JP3647556B2 - Cursor detection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cursor detection apparatus suitable for use in a computer apparatus or the like that performs multi-window display in which a plurality of windows are formed and displayed on a single display screen, and in particular, windows with complicated shapes are displayed in an overlapping manner. In some cases, the present invention relates to a cursor detection apparatus capable of detecting a window where a cursor is located at high speed and accurately.
[0002]
[Prior art]
Nowadays, so-called multi-window display is generally performed in which a plurality of windows are formed on a display screen of a monitor device, and an image or the like based on data from a computer device is displayed in each window.
[0003]
As such multi-window display, as shown in FIG. 10A, image data W1 displayed on each window in accordance with the shape of each window on the image memory 101 having a storage area corresponding to the display screen 100. ... W3 is controlled in writing, and this is read out and displayed in synchronism with the display scanning, and a drawing area composition method and a storage area corresponding to the display screen 104 as shown in FIG. The image data W1 to W3 of each window are written and controlled on a plurality of image memories 105 to 106 provided for each window, and read and controlled in synchronization with display scanning, and read from each image memory 105 to 106. The displayed image data W1 to W3 are displayed by being controlled by the changeover switch 108 according to the shape of each window. Expressions "and it has been known.
[0004]
The “rendering composition method” is configured to read and control image data W1 to W3 of each window on one image memory 101, so that a still image is displayed on a rather simple window. Suitable for.
[0005]
On the other hand, since the “compositing method at the time of display” allows image data W1 to W3 of each window to be separately written and controlled on a plurality of image memories 105 to 106, for example, a complicated character such as an animation character is used. It is also possible to deal with display of shape windows and moving images.
[0006]
Here, in a computer system that executes an application program for each window, it is necessary to detect a window designated by a user with a cursor and execute the application program according to the detection result. For this reason, in the computer system, a display control unit or firmware that manages the cursor position detects the cursor position.
[0007]
Specifically, as shown in FIG. 11, the computer system includes a pointing device 110 such as a mouse and a tablet, a keyboard 111, a secondary storage device 112 such as a magneto-optical disk drive device, and an image memory such as a frame memory. 113, a window detection unit 114, and a display control unit 115 to which a monitor device 116 is connected are connected to a processor 117 via a bus line 118, respectively.
[0008]
In such a computer system, the display control unit 115 displays the image data written in the image memory 113 by the above-described “rendering composition method” or “display composition method” on the monitor device 116 in a multi-window, and The image data is stored in the secondary storage device 112. Further, the processor 117 detects a cursor position on the display screen that is moved and controlled in accordance with the operation of the pointing device 110 or the keyboard 111, and the window detection unit 114 is based on the cursor position detected by the processor 117. Currently, the window in which the cursor is located is detected, and the processor 117 executes the application program for each window accordingly.
[0009]
For example, as shown in FIG. 12, first to third windows W1 to W3 each having a rectangular shape are displayed on the display screen of the monitor device 116, and the cursor 120 is positioned on the second window. If so, the processor 117 forms coordinates with the upper left corner of the display screen as the origin O, the horizontal direction of the display screen as the X axis, and the vertical direction of the display screen as the Y axis. Is detected in the form of coordinate data (in this case, X4, Y3) and supplied to the window detector 114.
[0010]
Next, the processor 117 detects the display priority of each of the windows W1 to W3 displayed on the display screen based on the display control data from the display control unit 115, and the first display priority. The coordinate data indicating the display area of the window having the rank is supplied to the window detection unit 114.
[0011]
In this case, assuming that display priority is given in order from the first window W1 displayed in front of the display screen, the processor 117 first forms a rectangular shape that forms the display area of the first window W1. The coordinate data (X3, Y5 and X7, Y7) on the diagonal line are supplied to the window detector 114.
[0012]
When the cursor 120 exists in the first window W1, the X-axis coordinate data (X4) of the cursor 120 is greater than or equal to the X-axis coordinate data (X3) of one end of the diagonal line, and the other end of the diagonal line Similarly, the Y-axis coordinate data (Y3) of the cursor 120 is equal to or greater than the Y-axis coordinate data (Y5) of one end of the diagonal line, and the other end of the diagonal line. It should be less than the coordinate data (Y7) of the Y axis.
[0013]
Therefore, the window detection unit 114 compares the coordinate data (X4, Y3) of the cursor 120 with the coordinate data of the first window W1, so that the X-axis and Y-axis coordinate data of the cursor 120 is obtained. It is determined whether or not both of the above conditions are satisfied. Then, when the coordinate data of the X-axis and the Y-axis of the cursor 120 satisfy both the above-described conditions, it is determined that the cursor 120 exists in the first window W1.
[0014]
  In this case, since the cursor 120 is located in the display area of the second window W2, the Y-axis coordinate data (Y3) of the cursor 120 is the Y-axis coordinate data (one of the diagonal lines of the first window W1) ( Y5) Since the following condition is satisfied, the predetermined condition is not satisfied. For this reason, the processor 117 performs coordinate data (X on the diagonal line) indicating the display area of the second window W2 having the next highest priority.2, Y2And X6, Y6) Is supplied to the window detection unit 114.
[0015]
The window detection unit 114 next compares the coordinate data of the second window W2 with the coordinate data of the cursor 120, and determines whether or not both the above conditions are satisfied.
[0016]
In this case, the X-axis coordinate data X4 of the cursor 120 is greater than or equal to the X-axis coordinate data X2 at one end on the diagonal line of the second window W2 and less than or equal to the X-axis coordinate data X6 at the other end (X2 ≦ X4 ≦ X6), the Y-axis coordinate data Y3 of the cursor 120 is equal to or greater than the Y-axis coordinate data Y2 at one end on the diagonal, and is equal to or less than the Y-axis coordinate data Y6 at the other end (Y2 ≦ Y3 ≦ Y6). In order to satisfy a predetermined condition, the window detection unit 114 determines that the cursor 120 exists in the second window W2, and supplies data indicating this to the processor 117.
[0017]
When the window in which the cursor 120 exists is detected, the processor 117 executes the application program specified by this window.
[0018]
If the coordinate data of the cursor 120 and the coordinate data of the second window W2 are compared, and if it is determined that the above condition is still not satisfied, the processor 117 next determines the priority order. The high coordinate data of the third window W3 is supplied to the window detection unit 114, and the window detection unit 114 compares the coordinate data of the cursor 120 with the coordinate data of the third window W3.
[0019]
Next, the description has been given of the case where each of the windows W1 to W3 has a rectangular shape. However, when the shape of the window has a complicated shape as shown in FIG. As shown by the dotted line in FIG. 8A, one window is divided by horizontal straight lines to form a plurality of rectangular display areas R1 to R5 as shown in FIG. Similarly to the above, coordinate data is supplied to the window detection unit 114 in order from the window W1 with the highest priority. At this time, each coordinate data of the display areas R1 to R5 formed by the division is detected by the window detection. Supplied to the unit 114. The window detection unit 114 compares the coordinate data of the cursor 120 with the coordinate data of the display areas R1 to R5, respectively, as described above.
[0020]
As a result, it is possible to detect the window where the cursor 120 is positioned corresponding to a complicated shape, and to execute an application program corresponding to the window.
[0021]
[Problems to be solved by the invention]
However, when the shape of the window is complicated, the conventional computer system divides the window into a plurality of rectangular display areas, compares the coordinate data of each display area with the coordinate data of the cursor, Since the number of rectangular display areas formed by the division increases, there is a problem that it takes time to detect the window where the cursor is located. Such a problem becomes more prominent when the shape of the window is a particularly complicated shape such as an animation character.
[0022]
In a computer system that executes an application program for each window, the application program cannot be executed until the window where the cursor is located is detected. Therefore, the time required to detect the window where the cursor is located is reduced. Shortening is a very important issue in order to increase the system speed that has been desired.
[0023]
The present invention has been made in view of the above-described problems, and can accurately and quickly detect a window where a cursor is located from a plurality of windows displayed in a multi-window regardless of the shape of the window. An object of the present invention is to provide a simple cursor detection device.
[0024]
[Means for Solving the Problems]
The cursor detection apparatus according to the first aspect of the present invention writes window image information to be displayed in each window into a plurality of storage means corresponding to each window, and the window image information written in each storage means. At the time of display in which each window image information read out from each storage means is selected at the same time in synchronization with the display scanning of the display means and is selected for each pixel according to the display priority order of the window and supplied to the display means A cursor detection device for detecting a window where a cursor on a display screen is located from a plurality of windows displayed in a multi-window by a composition method, and for solving the above-described problem, a cursor position detection means, a window image It has detection means, coincidence detection means, and window detection means.
[0025]
  In such a cursor detection device, the cursor position detection means detects the position of the cursor on the display screen displayed in a multi-window.Processing is performed in synchronization with the display scanning of the display means.. Further, the window image detecting means detects whether or not the information read from each storage means is window image information displayed in the window.Processing is performed in synchronization with the display scanning of the display means.. The coincidence detection means includes each detection output from the window image detection means and the cursor position detection means.As information indicating the timing of the current cursor display positionBy comparing the cursor position detection output with the display scanning of the display means, it is detected whether or not the cursor is positioned within the window image of the window image information detected by the window image detection means.
[0026]
Here, when a part of each window is overlapped and displayed in a multi-window, if the cursor is located in a part other than the overlapping part of each window, the cursor is displayed in the window image. There is only one detection output from the coincidence detection means indicating the position. Therefore, when only one detection output indicating that the cursor is positioned in the window image is supplied from the coincidence detection unit, the window detection unit detects a storage unit storing the window image information. The window displaying the window image information stored in the storage means is detected as the window where the cursor is located.
[0027]
On the other hand, when a part of each window is overlapped and displayed in a multi-window, when the cursor is positioned in the overlapping part of each window, the coincidence detection means displays each window. Detection output for the number of overlapping sheets is obtained. For this reason, the window detection means detects a storage means storing the window image information of the window having the highest display priority among the windows displaying the respective window image information, and is stored in the storage means. The window displaying the window image information is detected as the window where the cursor is located.
[0028]
As a result, the window where the cursor is located can be detected accurately and at high speed from a plurality of windows displayed in multiple windows regardless of the shape of the window.
[0029]
Next, when one window image is written in the one storage means, the upper limit of the number of windows that can be displayed by multi-window display is the number of the storage means. For this reason, the cursor detection apparatus according to the second aspect of the present invention is provided with a plurality of window writing control means for controlling writing of a plurality of window image information to one storage means.
[0030]
However, in the method of detecting the window where the cursor is located, the window where the cursor is located is indirectly detected by detecting the storage means storing the window image where the cursor is located. Therefore, when a plurality of window images are written in one storage means by the plurality of window writing control means, the storage means can be detected, but the plurality of window images written in the storage means can be detected. It cannot be detected in which window the cursor is located.
[0031]
  Therefore, in the cursor detection device, when a plurality of window image information is written in one storage means by the plurality of window writing control means, the window detection means displays the window image of the window where the cursor is located. After detecting the storage means storing the information, the display positions of the plurality of windows based on the plurality of window image information stored in the storage meansHighThe display position of each window is sequentially detected, and the display position of the cursor detected by the cursor position detecting means is sequentially compared. Then, the window first detected as the cursor is positioned is detected as the window where the cursor is positioned.
[0032]
As a result, the number of windows that can be displayed in multiple windows can be expanded to a number greater than the number of storage means provided, and the window where the cursor is located can be detected quickly and accurately.
[0033]
Next, according to a third aspect of the present invention, there is provided a cursor detection device for detecting a window in which a cursor is positioned on a display screen from a plurality of windows displayed in a multi-window by the above-described display composition method. Although it is an apparatus, as other means for solving the above-mentioned problems, it has cursor position detecting means, discrimination information writing means, window image detecting means, coincidence detecting means, and window detecting means. .
[0034]
  In such a cursor detection device, the discrimination information writing means controls to write discrimination information that can be discriminated with respect to the window image information in an area other than the area where the window image information is written in each storage means. The window image detecting means detects the window image information from the window image information and the discrimination information read from each storage means.Is performed in synchronization with the display scanning of the display means., The coincidence detection means is supplied from the window image detection meansAs information indicating whether it is window image informationEach detection output and the above cursor position detection meansAs information indicating the timing of the current cursor display positionBy comparing the cursor position detection output with the display scanning of the display means, it is detected whether or not the cursor is positioned within the window image detected by the window image detection means.
[0035]
  The window detection means outputs a detection output indicating that the cursor is positioned in the window image from the coincidence detection means.Only oneWhen supplied, the window displaying the window image information is detected as the window where the cursor is positioned, and when a plurality of detection outputs indicating that the cursor is positioned in the window image are supplied from the coincidence detecting means, Of the windows displaying each window image information, the window with the highest display priority is detected as the window where the cursor is located.
[0036]
Since the cursor detection device writes the discrimination information together with the window image information to each storage means, the discrimination between the window image information and other information is accurate when detecting the window where the cursor is located. The window where the cursor is located can be performed accurately and at high speed.
[0037]
  Next, the cursor detection device according to the present invention described in claim 4 writes the window image information to be displayed in each window into the storage means,The noteWritten in memoryeachCursor detection that detects the window where the cursor is located on the display screen from the multiple windows displayed in a multi-window display by the composition method at the time of drawing that supplies the window image information to the display means in synchronization with the display scanning of the monitor device In order to solve the above-described problem, the apparatus includes a plurality of temporary storage means, discrimination information writing means, cursor position detection means, and window detection means.
[0038]
In such a cursor detection apparatus, window image information to be displayed in each window is written in the plurality of temporary storage means before being written in the storage means. The discrimination information writing means controls to write discrimination information that can be discriminated with respect to the window image information in an area other than the area where the window image information is written in each temporary storage means.
[0039]
The window image information written in each temporary storage means is synthesized on the storage means by being written on the storage means, and read out collectively in synchronism with the display scanning of the display means, so-called drawing. A multi-window display is made by the time composition method.
[0040]
  The window detecting means is a display priority order of windows for displaying each window image.HighIn turn, each window image information and discrimination information is read from each temporary storage means.,UpDetected by cursor position detection meansIndicates the position coordinates of the cursorCursor position informationShowIt is detected whether the information at the cursor position is window image information or discrimination information. Then, the window having the window image information first determined that the information on which the cursor is positioned is the window image information is detected as the window on which the cursor is positioned.
[0041]
Thereby, even when the drawing composition method is adopted as the multi-window display method, the window where the cursor is located can be detected at high speed and accurately.
[0042]
  Next, according to a fifth aspect of the present invention, there is provided a cursor detection device for detecting a window in which a cursor on a display screen is located from a plurality of windows displayed in a multi-window by the above-described composition method at the time of drawing. Although it is an apparatus, as another means for solving the above-mentioned problem, when the window shape at the time of multi-window display is a simple shape (predetermined shape) such as a rectangular shape or a regular square shape, for example, The window image information of each window is written and controlled in the storage means, and the window shape isOgataWhen it is a shape other than the shape (when it is a complicated shape), it has a write control means for controlling the window image information of each window to the temporary storage means.
[0043]
  In this case, the window detection meansRectangularWhen the window image information of the window shape is written in the storage means, the display position of each window according to each window image information written in the storage means is set as the display priority of each window.HighThe display position of each window is sequentially detected and the display position of the cursor detected by the cursor position detection means is sequentially compared, and the window first detected as the cursor is positioned is set as the window where the cursor is positioned. To detect.
[0044]
  Also,OgataWhen window image information of a window shape other than the shape is written in each temporary storage means, the window detection means displays the display priority order of the windows for displaying the window images.HighIn turn, each window image information and discrimination information is read from each temporary storage means.,UpDetected by cursor position detection meansIndicates the position coordinates of the cursorCursor position informationShowIt is detected whether the information at the cursor position is window image information or discrimination information. Then, the window having the window image information first determined that the information on which the cursor is positioned is the window image information is detected as the window on which the cursor is positioned.
[0045]
This makes it possible to select a storage means for writing the window image information according to the complexity of the window shape, etc., and to detect the window where the cursor is located by an optimum method according to the window shape Can do. For this reason, the window in which the cursor is located can be detected quickly and accurately.
[0046]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a preferred embodiment of a cursor detection device according to the present invention will be described in detail with reference to the drawings.
[0047]
The cursor detection device according to the present invention can be applied to a multi-window display device that performs multi-window display by the “composition method at the time of display”.
[0048]
As shown in FIG. 1, the multi-window display device according to the first embodiment of the present invention has a plurality of window image generators (images) for forming images (window images) to be displayed in each window during multi-window display. WG1 to WGn) 1, a window detection unit 2 that detects a window where the cursor is located on the display screen, and a window device from each window image generation unit 1 that selects a window image according to the shape of the window to be displayed and monitors The data selector 3 supplied to 4 is connected to a processor 5 that controls the entire multi-window display device.
[0049]
Each window image generator 1 stores in the image memory 7 image data 7 for storing image data of an image to be displayed in the window, and timing data synchronized with scanning of the monitor device 4 supplied from the processor 5. An address generation circuit 6 for generating address data for reading out the image data and whether the image data read from the image memory 7 is in the window or outside the window for each pixel. The mask circuit 8 is configured to determine and output enable data (e1 to en) when it is within the window.
[0050]
The window detection unit 2 is provided corresponding to the number of vertical position detection circuits 9 and horizontal position detection circuits 10 that detect the position of the cursor on the display screen, and the number of the window image generation units 1. A plurality of AND gates 11 for detecting coincidence between the cursor position detection data indicating the position of the cursor detected by the position detection circuits 9 and 10 and the enable data from each window image generation unit 1, and a window supplied from the processor 5 The window image generation unit 1 forming the window image on which the cursor is positioned is detected based on the priority order data indicating the display priority order and the coincidence detection data supplied from each AND gate 11, and this window image generation unit And a priority encoder 12 for supplying an identification code indicating 1 to the processor 5
[0051]
As shown in FIG. 2, the vertical position detection circuit 9 includes a Y coordinate register 15 for storing the Y coordinate data of the cursor displayed on the display screen, and a horizontal synchronization counter 16 for counting the horizontal synchronization signal of the monitor device. And the vertical position of the cursor on the display screen (display screen) by detecting the coincidence of the Y coordinate data from the Y coordinate register 15 and the count data from the horizontal synchronization counter 16. And a coincidence detection circuit 17 for detecting the vertical position).
[0052]
The horizontal position detection circuit 10 includes an X coordinate register 18 for storing X coordinate data of the cursor displayed on the display screen as shown in FIG. 2 and the number of dots (pixel number) in the horizontal direction of the monitor device. The dot counter 19 that counts the X coordinate data from the X coordinate register 18 and the count data from the dot counter 19 are detected to detect the horizontal position of the cursor on the display screen (the horizontal position of the display screen). ), And a coincidence detection circuit 20 for detecting coincidence between the horizontal direction coincidence detection data and the vertical direction coincidence detection data from the coincidence detection circuit 17.
[0053]
Next, the operation of the multi-window display device according to the first embodiment having such a configuration will be described.
[0054]
First, in FIG. 1, when multi-window display is designated, the processor 5 detects the shape of each window and supplies shape data indicating the window shape to the address generation circuit 6 of each window image generation unit 1. Then, the image data of the image to be displayed in each window is supplied to the image memory 7 of each window image generation unit 1. When the shape data is supplied, each address generation circuit 6 forms a write address corresponding to the window shape indicated by the shape data, and supplies it to each image memory 7 and each mask circuit 8. As a result, image data is written on each image memory 7 in accordance with each window shape.
[0055]
Next, each address generation circuit 6 forms a read address for reading the image data written in each image memory 7 in synchronization with the horizontal synchronization signal supplied from the processor 5, and this is formed in each image memory 7. To supply. As a result, the image data written in each image memory 7 is read out and supplied to the data selector via the mask circuit 8.
[0056]
Note that this read address is not for reading only the image data written in each of the image memories 7, but for reading out the image data and data in an area other than the area in which the image data is written. .
[0057]
Each mask circuit 8 is supplied with a write address corresponding to each window shape from the processor 5 as described above. Therefore, each mask circuit 8 determines for each pixel whether or not the image data read from each image memory 7 is displayed in the window based on the write address. When it is displayed in the window, enable data (e1 to en) is formed and supplied to the data selector and each AND gate 11 described later.
[0058]
The data selector 3 is supplied with priority data indicating the priority of each window displayed in a multi-window manner from the processor 5. For example, the priority order data is assigned in order from the window located in front of the display screen (in the order of W1, W2, W3... In FIG. 1). The data selector 3 selects the image data read from each image memory 7 based on the priority data and the enable data from each mask circuit 8 and supplies it to the monitor device 4. Thereby, an image corresponding to each image data can be displayed in each shape window, and multi-window display by a so-called “display composition method” can be performed.
[0059]
Next, on the display screen displayed in such a multi-window, a cursor is displayed at a position designated by a cross key or a mouse of the keyboard. The multi-window display device has the following characteristic features. By the operation, the window where the cursor is located is identified and detected from among the windows displayed in the multi-window.
[0060]
That is, when the multi-window display is designated, the processor 5 performs multi-window display by controlling each unit as described above, and displays the cursor on the vertical position detection circuit 9 and the horizontal position detection circuit 10. Y coordinate data Y0 indicating the vertical position on the screen and X coordinate data X0 indicating the horizontal position of the cursor on the display screen are supplied.
[0061]
Specifically, the vertical position detection circuit 9 and the horizontal position detection circuit 10 are configured as shown in FIG. 2, and the processor 5 supplies the Y coordinate data Y0 to the Y coordinate register 15. At the same time, the X coordinate data X 0 is supplied to the X coordinate register 18.
[0062]
Further, when reading out the image data written in each image memory 7, the processor 5 supplies each address generation circuit 6 with a horizontal synchronizing signal synchronized with the display scanning of the monitor device 4 and shown in FIG. This is supplied to the horizontal synchronization counter 16 of the vertical position detection circuit 9.
[0063]
Further, the processor 5 forms a dot clock synchronized with the scanning of each pixel of each line of the monitor device 4, and supplies this to the dot counter 19 of the horizontal position detection circuit 10 shown in FIG.
[0064]
  The Y coordinate register 15 detects the coincidence of Y coordinate data Y0 indicating the vertical position of the display screen of the cursor.circuit17 is supplied. The horizontal synchronization counter 16 counts horizontal synchronization signals for one frame (or one field) and supplies the count data to the coincidence detection circuit 17. The coincidence detection circuit 17 compares the Y coordinate data Y0 and the count data, and supplies the vertical direction coincidence detection data to the coincidence detection circuit 20 of the horizontal direction position detection circuit 10 at the timing when both coincide.
[0065]
The horizontal synchronization counter 16 counts the horizontal synchronization signal, thereby supplying count data indicating the line currently being scanned by the monitor device 4 to the coincidence detection circuit 17. The Y coordinate register 15 supplies the coincidence detection circuit 17 with Y coordinate data Y0 indicating the vertical position of the cursor display screen, that is, the line where the cursor is located. For this reason, the coincidence detection circuit 17 can detect the line on the monitor device 4 where the cursor is located by detecting the coincidence of both.
[0066]
  Next, the X coordinate register 18 detects coincidence of the X coordinate data X0 indicating the horizontal position of the display screen of the cursor.circuit20 is supplied. The dot counter 16 counts dot clocks synchronized with scanning of each pixel of each line of the monitor device 4 and supplies the count data to the coincidence detection circuit 20.
[0067]
The coincidence detection circuit 20 compares the X coordinate data X0 and the dot clock count data. If the X coordinate data X0 and the dot clock count data match, the position of the cursor in the horizontal direction on the display screen is detected. Therefore, the coincidence detection circuit 20 forms horizontal direction coincidence detection data indicating that the horizontal position of the cursor has been detected at the timing when the X coordinate data X0 and the count data coincide. When the horizontal direction coincidence detection data is formed, the horizontal direction coincidence detection data is compared with the vertical direction coincidence detection data supplied from the horizontal synchronization counter 16 to detect a coincidence between them.
[0068]
The coincidence of the horizontal direction coincidence detection data and the vertical direction coincidence detection data indicates that the scanning timing of the monitor device is the timing of the current cursor display position. Therefore, the coincidence detection circuit 20 forms cursor detection data at the timing when the horizontal direction coincidence detection data coincides with the vertical direction coincidence detection data, and supplies this to each AND gate 11 shown in FIG.
[0069]
Next, as described above, each mask circuit 8 of each window image generation unit 1 determines, for each pixel, whether or not the image data read from each image memory 7 is displayed in the window. When it is determined and displayed in the window, enable data (e1 to en) is supplied to each AND gate 11. Therefore, each AND gate 11 receives enable data (e1 to en) supplied from each window image generation unit 1 and cursor detection data supplied from the coincidence detection circuit 20 of the horizontal position detection circuit 10. In comparison, the coincidence detection data is supplied to the priority encoder 12 at the timing when the two coincide.
[0070]
Each of the enable data (e1 to en) is data output when scanning the pixels of the image displayed in the window, and the cursor detection data is data output when scanning the display position of the cursor on the display screen. It is. Therefore, for example, as shown in FIG. 1, when two windows are overlapped and displayed in a multi-window, and the cursor is positioned at the overlapping portion, the window image forming the two window images is displayed. The coincidence detection data is output from the two AND gates 11 to which the enable data from the generation unit 1 is supplied.
[0071]
When the cursor is located in a portion other than the overlapping portion, only one AND gate 11 to which enable data from the window image generation unit 1 forming the window where the cursor is located is supplied. The coincidence detection data is output.
[0072]
The priority encoder 12 is supplied with display priority data indicating the display priority of each window displayed in a multi-window from the processor 5. This display priority is updated whenever the display order of windows is changed by an instruction from the user or the like.
[0073]
When two or more coincidence detection data are supplied from each of the AND gates 11, the priority encoder 12 is prioritized by the display priority data (the one with a lower display priority: in the case of FIG. A window image generator that selects coincidence detection data corresponding to the window W2 if the cursor is positioned at the overlapping portion of the window W3 and supplies enable data to the AND gate 11 that outputs the coincidence detection data. 1 is detected. Then, an identification code indicating the window image generation unit 1 is formed and supplied to the processor 5.
[0074]
As a result, even when the windows overlap and are displayed in multiple windows, the window where the cursor is located can be accurately detected from the windows.
[0075]
When only one coincidence detection data is supplied from each AND gate 11, the priority encoder 12 supplies enable data to the AND gate 11 that outputs the coincidence detection data regardless of the display priority data. The window image generation unit 1 is detected, and an identification code indicating the window image generation unit 1 is supplied to the processor 5.
[0076]
When the identification code is supplied, the processor 5 fetches the identification code as data indicating the window where the cursor is located, and executes the application program corresponding to the window.
[0077]
As described above, the multi-window display device according to the first embodiment of the present invention displays the display position of the cursor and the display position of the display image on the monitor device when the multi-window display is performed. The window image generation unit 1 that forms the window with the highest display priority is detected from the window images corresponding to the display position of the cursor, and the window image generator 1 detects the window. The window formed by the image generation unit 1 is detected as the window where the cursor is currently located. As a result, it is possible to accurately detect the window where the cursor is located regardless of the number, shape, overlap, and the like of the windows displayed in the multi-window.
[0078]
In addition, since the detection of such a window is performed in synchronization with the display scanning of the monitor device 4, the detection of the window where the cursor is located can be performed within the display period of one frame. That is, when the television system of the monitor device 4 is the NTSC system, which is a Japanese standard system, the cursor position can be detected at a high speed within 1/30 seconds. For this reason, when the multi-window display device is applied to a computer device that executes an application program for each window, the application program can be started within a display period of one frame, thereby improving responsiveness. Can do.
[0079]
Here, although the multi-window display device according to the first embodiment has been described as one window image being written and controlled in each image memory 7 of each window image generation unit 1, the multi-window display device has been described. The window display device can form a plurality of windows more than the number of window image generation units 1 provided by controlling the writing of a plurality of window images to each image memory 7.
[0080]
In this case, the processor 5 combines and controls writing of a plurality of window images in one image memory 7. As a result, a plurality of window images are read out from one window image generating unit 1 at the time of reading, and the number of window images generating unit 1 provided in the multi-window display device on the monitor device 4 is more than the number of window images. A number of windows can be displayed.
[0081]
As described above, when a plurality of window images are combined and written and displayed in one image memory 7, the detection operation of the window on which the cursor is positioned is as shown in the flowcharts of FIGS.
[0082]
First, the flowchart shown in FIG. 3 starts when multi-window display is executed, and proceeds to step S1.
[0083]
In step S1, as described above, the processor 5 detects the window image generation unit 1 forming the window image where the cursor is located based on the cursor display position, enable data, and priority data, and performs step. Proceed to S2.
[0084]
In step S2, the processor 5 determines whether or not one window image generation unit 1 detected as forming the window image on which the cursor is located combines a plurality of windows. In step S3, it is detected that the cursor is positioned in the window formed by the window image generating unit 1, and all the routines in the flowchart shown in FIG.
[0085]
On the other hand, if it is determined in step S2 that the plurality of windows are combined (Yes), the processor 5 proceeds to step S11 to execute the flowchart of the subroutine shown in FIG.
[0086]
In step S11, the processor 5 detects the cursor position (the X coordinate data X0 and the Y coordinate data Y0) on the display screen of the monitor device 4, and proceeds to step S12.
[0087]
Next, in step S12, the processor 5 detects coordinate data indicating the display area of each window Wi (1 ≦ i ≦ n) displayed in a multi-window on the display screen based on the display priority. Then, the process proceeds to step S13.
[0088]
That is, the display priorities of the windows displayed in the multi-window are assigned in order from the front of the display screen. Therefore, the processor 5 first obtains the X coordinate data Xj, Y coordinate data Yj of one end of the diagonal line of the display area of the first window W1 and the X coordinate data Xj + 1, Y coordinate data Yj + 1 of the other end of the diagonal line. Detect and proceed to step S13.
[0089]
Next, in step S13, the processor 5 compares the coordinate data of the cursor with the coordinate data of the first window W1, and the coordinate data of the X axis of the cursor is at one end of the diagonal line of the first window W1. Whether or not the X-axis coordinate data is equal to or greater than the X-axis coordinate data of the other end, and is equal to or greater than the Y-axis coordinate data of one end of the diagonal and equal to or less than the Y-axis coordinate data of the other end (Xj ≦ X0.ltoreq.Xj + 1 and Yj.ltoreq.Y0.ltoreq.Yj + 1) are determined. If yes, the subroutine is terminated and the process proceeds to step S3 shown in FIG. 3, and if no, the process returns to step S12.
[0090]
That is, in this step S13, by comparing the coordinate data indicating the position of the cursor with the coordinate data at both ends of the diagonal line forming the first window W1, is the cursor positioned in the first window W1? Determine whether or not. If both of the above conditions “Xj ≦ X0 ≦ Xj + 1 and Yj ≦ Y0 ≦ Yj + 1” are not satisfied, it is determined whether or not this condition is satisfied in the second window W2 having the next highest priority. Therefore, the process returns to step S12.
[0091]
Next, when returning to step S12, the processor 5 detects the coordinate data of the opposite ends of the diagonal line of the display area of the second window W2 having the next highest priority, and proceeds to step S13. In step S13, the coordinate data of the cursor and the coordinate data of the second window W2 are compared again to determine whether or not the above condition is satisfied.
[0092]
Thus, the multi-window display device detects the window in which the cursor is located by detecting the coordinate data of each window in the order of priority and sequentially comparing this with the coordinate data of the cursor.
[0093]
Next, when it is determined Yes in step S13 and the process proceeds to step S3 shown in FIG. 3, the processor 5 determines that the cursor is positioned in the window finally detected in step S13, and the process in FIG. All the routines in the flowchart shown in FIG.
[0094]
In the multi-window display device according to the first embodiment, even when a plurality of windows are formed and displayed by one window image generation unit 1, the coordinates of each window formed by the window image generation unit 1 are displayed. The window in which the cursor is located can be detected by sequentially comparing the data and the coordinate data of the cursor. For this reason, it is possible to detect a window where the cursor is positioned in correspondence with a complicated and many multi-window display.
[0095]
Next, a multi-window display device according to the second embodiment of the present invention will be described. In the multi-window display device according to the first embodiment described above, the mask circuit 8 determines whether or not the image data read from the image memory is in the window. When the window image is written in the image memory, the multi-window display device according to the second embodiment writes predetermined color data (for example, transparent color data) that is not used in the window image in an area other than the window area. By detecting this transparent color data at the time of reading, it is determined whether or not the image data read from the image memory is in the window.
[0096]
In the description of the multi-window display device according to the second embodiment, the same reference numerals are given to the portions showing the same operations as those of the multi-window display device according to the first embodiment described above, and the detailed description thereof will be omitted. Description is omitted.
[0097]
That is, the multi-window display device according to the second embodiment includes a plurality of window image generation units (WG1 to WGn) 25 that generate window images for performing multi-window display as shown in FIG. When a window image is written, for example, based on the transparent color image drawing unit 27 that controls writing of transparent color data that is not used in the window image to an area outside the window, and the transparent color data written in the image memory. The window detection unit 26 detects the window where the cursor is located, the processor 28 controls the operation of the entire multi-window display device, and the data selector 3 to which the monitor device 4 is connected.
[0098]
Each window image generation unit 1 includes an image memory for writing and reading a window image, and an address generation circuit for forming a write address and a read address for writing and reading a window image in the image memory. Yes.
[0099]
  As shown in FIG. 5, the window detection unit 26 includes the vertical position detection circuit 9, the horizontal position detection circuit 10, the plurality of AND gates 11, the priority encoder 12, and the transparent color read from the image memory. Transparent color detection circuit that detects image data read together with data and supplies the detected data to each AND gate 11 as enable data30It consists of and.
[0100]
  Transparent color detection circuit30Is a transparent color image register that outputs transparent color data at the timing when the transparent color data written in each image memory is read out.31And the transparent color image register31And a plurality of comparators 29 for supplying enable data to the AND gates 11 when the transparent color data from the image data is compared with the data read from each image memory.
[0101]
Next, the operation of the multi-window display device according to the second embodiment having such a configuration will be described.
[0102]
In the multi-window display device according to the second embodiment, when the multi-window display is designated by the user, the processor 28 sends the window shape data indicating the designated window shape to the address generation circuit of the window image generation unit 25. The window image to be displayed on the window is supplied to the image memory.
[0103]
When the window shape data is supplied, the address generation circuit forms write address data corresponding to the shape and supplies it to the image memory. As a result, a window image is written in the image memory corresponding to the window shape.
[0104]
When the window image is written in the image memory, the transparent color image drawing unit 27 has a transparent color which is data of a color not used in the window image in an area other than the area where the window image is written. The image memory is controlled so as to write data. As a result, a window image is written in the image memory corresponding to the window shape, and transparent color data is written in the other area.
[0105]
Next, when each data is written in each image memory of each window image generation unit 25 in this way, the processor 28 designates reading of the data written in each image memory. When reading of data is designated, the address generation circuit forms read address data for reading all the data written in the respective image memories in synchronization with the display scanning of the monitor device 4, and stores the read address data in the image memory To supply. As a result, the transparent color data as well as the image data are read from the image memory for each scanning line, and supplied to the data selector 3 and the window detection unit 26 described later.
[0106]
When the image data and the transparent color data are read from each image memory, the processor 28 selects and controls the data selector so as to select only the image data in each window. Thereby, only the image data can be selected and supplied to the monitor device 4 from the image data and the transparent color data read from each image memory. In each image memory, a window image is written corresponding to each window shape. Therefore, by selecting only the image data read from each image memory and supplying it to the monitor device 4, a multi-window display can be performed on the display screen of the monitor device 4.
[0107]
Next, when the window where the cursor is located is detected from the windows displayed in the multi-window as described above, the multi-window display device operates as follows.
[0108]
That is, in FIG. 6, when the multi-window display is executed, the processor 28 detects the Y coordinate data Y0 and the X coordinate data X0 as the position of the cursor on the display screen as described above, and uses this as the vertical position. This is supplied to the detection circuit 9 and the horizontal direction detection circuit 10, respectively. As a result, the position of the cursor on the display screen is detected at the timing synchronized with the display scanning of the monitor device as described above, and this detection output is supplied to each AND gate 11.
[0109]
  On the other hand, the processor 28 converts the address of the transparent color data written in each image memory into the transparent color image register.31To supply. Transparent color image register31Forms transparent color data for each window image generation unit 25 at a timing synchronized with the display scanning of the monitor device, and supplies this to each comparator 29.
[0110]
  Each comparator 29 is supplied with the image data and the transparent color data read from the image memory of each window image generation unit 25, and each of the data and the transparent color image register.31Compare with transparent color data from. When the image data read from the image memory is supplied to the comparator 29, the two do not match, and when the transparent color data read from the image memory is supplied to the comparator 29, both are Match. For this reason, each comparator 29 forms enable data (e1 to en), respectively, when the two do not match, that is, while the image data read from the image memory is supplied. This is supplied to the AND gate 11.
[0111]
Each AND gate 11 supplies the coincidence detection output to the priority encoder 12 at the timing when the cursor position detection output coincides with the enable data from each comparator 29 as described above. When two or more coincidence detection outputs are supplied from each AND gate 11, the priority encoder 12 detects the window image generation unit 25 forming the window image of the window with the highest priority, and generates this window image. The identification code of the unit 25 is supplied to the processor 28.
[0112]
Thus, the processor 28 detects the window formed by the window image generation unit 25 indicated by the identification code as the window where the cursor is currently located.
[0113]
  As described above, when the multi-window display device according to the second embodiment writes the window image in the image memory, it writes the transparent color data in an area other than the window area, and the data read from the image memory The transparent color image register at the timing of reading the transparent color data from the image memory31The comparator 29 compares the transparent data output from the first and second comparators 29, and if the two do not match, enable data is formed and supplied to each AND gate 11.
[0114]
Therefore, the mask circuit 8 provided in each window image generation unit 1 of the multi-window display device according to the first embodiment described above can be omitted, and the configuration of the window image generation unit 25 is simplified. In addition, the same effects as the multi-window display device according to the first embodiment described above can be obtained.
[0115]
Next, a multi-window display device according to the third embodiment of the present invention will be described. In the multi-window display device according to the first and second embodiments described above, the cursor detection device according to the present invention is applied to a multi-window display device that performs multi-window display by the “composition method at the time of display”. However, the multi-window display device according to the third embodiment is applied to a multi-window display device that performs multi-window display by the “rendering composition method”.
[0116]
In the description of the multi-window display device according to the third embodiment, the same reference numerals are given to the portions showing the same operations as those of the multi-window display device according to the first and second embodiments described above. Detailed description thereof is omitted.
[0117]
That is, the multi-window display device according to the third embodiment includes a window image generating unit 35 that collectively forms window images displayed in a multi-window and supplies them to the monitor device 4 as shown in FIG. A plurality of bitmap memories (BM1 to BMn) 36 to which each window image is written and read, and a transparent color image drawing unit for writing transparent color data to an area other than the window image writing area of each bitmap memory 36. 37, a window detection unit 38 for detecting a window where the cursor is located by a detection method described later, and a processor 39 for controlling the operation of the entire multi-window display device.
[0118]
The window image generation unit 35 includes an image memory in which a multi-window image is written and read, and an address generation circuit that controls writing to and reading from the image memory.
[0119]
Next, the operation of the multi-window display device according to the third embodiment having such a configuration will be described.
[0120]
First, when performing multi-window display, the processor 39 controls the writing of each window image to each bitmap memory 36, and the write address data of each window image written to each bitmap memory 36 is a transparent color image. This is supplied to the drawing unit 37. Based on the write address data, the transparent color image drawing unit 37 detects the writing area of each window image written in each bitmap memory 36, and writes the transparent color data in an area other than the writing area. Write control is performed on each bitmap memory 36. As a result, the transparent color data is written in each bitmap memory 36 in an area other than the window image writing area, for example, as shown by hatching in FIG.
[0121]
Next, when the window image and the transparent color data are written in each bitmap memory 36, the processor 39 reads them and supplies them to the image memory of the window image generation unit 35, and sets the write address of each window image. And supplied to the address generation circuit. The address generation circuit supplies the write address set by the processor 39 to the image memory. As a result, the window image read from each bitmap memory 36 is combined into one multi-window image.
[0122]
Next, when a multi-window image is formed on the image memory, the processor 39 sets a read address and supplies it to the address generation circuit. The address generation circuit supplies the read address set by the processor 39 to the image memory. As a result, the multi-window image written in the image memory is read out, supplied to the monitor device, and displayed in a multi-window.
[0123]
Next, the detection operation for detecting the window in which the cursor is located from the windows displayed in the multi-window by the “drawing composition method” is as shown in the flowchart of FIG.
[0124]
The flowchart shown in FIG. 9 starts when multi-window display is executed, and proceeds to step S21.
[0125]
In step S21, the processor 39 detects the display position of the cursor displayed on the display screen, supplies X coordinate data X0 and Y coordinate data Y0 indicating the display position to the window detection unit 38, and proceeds to step S22. move on.
[0126]
In step S22, the window detection unit 38 first forms a first window W1 having the highest priority (the window displayed in the forefront of the display screen) from the windows displayed in the multi-window. The present bitmap memory 36 is detected, and the process proceeds to step S23.
[0127]
In step S23, the window detection unit 38 receives the X coordinate data X0 and Y coordinate data Y0 indicating the display position of the cursor supplied from the processor 39, and the X coordinate data and Y coordinate of the display position of the first window W1. Based on the data, an image on the bitmap memory where the cursor is located is detected, and the process proceeds to step S24.
[0128]
In step S24, the window detection unit 38 determines whether or not the image on the bitmap memory where the cursor is located is an image of transparent color data (or outside the bitmap memory area). If Yes, step S22 is performed. Returning to step S25, the process proceeds to step S25.
[0129]
When the process returns to step S22, the window detection unit 38 detects the bitmap memory 36 forming the second window W2 having the next highest priority from the windows displayed in the multi-window, and the process proceeds to step S23. Proceed to
[0130]
In step S23, the window detection unit 38 receives the X coordinate data X0 and Y coordinate data Y0 indicating the display position of the cursor supplied from the processor 39, and the X coordinate data and Y coordinate of the display position of the second window W2. Based on the data, an image on the bitmap memory where the cursor is located is detected, and the process proceeds to step S24.
[0131]
In step S24, the window detection unit 38 determines whether or not the image on the bitmap memory where the cursor is located is an image of transparent color data. If yes, the process returns to step S22. If no, the window detection unit 38 returns to step S22. Proceed to S25.
[0132]
The window detection unit 38 thus detects window images in order of priority and detects the position of the cursor in the window image. If the image on which the cursor is positioned is an image of transparent color data, the routines shown in steps S22 to S24 are repeated, and if the image on which the cursor is positioned is not transparent color data, the process proceeds to step S25. .
[0133]
If the image where the cursor is located is not an image of transparent color data, it indicates that the cursor is located within the window. Therefore, in step S25, the window detection unit 38 forms an identification code indicating this window, supplies it to the processor 39, and ends all the routines in the flowchart shown in FIG.
[0134]
The processor 39 detects the window where the cursor is located by this identification code, and executes the application program corresponding to the window.
[0135]
As described above, when the multi-window display device according to the third embodiment performs multi-window display by the “drawing composition method”, the cursor displayed on the display screen is arranged in the order of position and priority. The read window image on each bitmap memory 36 is compared, and a window in which window image data other than transparent color data is written at a position where the cursor is located is detected as a window where the cursor is currently located. As a result, the cursor position and the window image on each bitmap memory 36 are compared in the order of priority of the windows, and the time required for detection depends on the number of windows. Even when the condition is complicated, it is possible to detect the window where the cursor is positioned at a higher speed than before, and to obtain substantially the same effect as the multi-window display device according to each of the above-described embodiments.
[0136]
Next, a multi-window display device according to a fourth embodiment of the present invention will be described.
[0137]
The multi-window display device according to the third embodiment described above writes a window image to each bitmap memory 36 regardless of the shape of the window. The multi-window display device according to the fourth embodiment The display device uses the bitmap memory 36 when the window shape is a shape other than a rectangular shape (or a rectangular shape such as a regular square shape). When the window shape is a rectangular shape, An image memory is used.
[0138]
The multi-window display device according to the fourth embodiment is structurally the same as the multi-window display device according to the third embodiment described above. Suppose that FIG. 7 is used.
[0139]
First, when performing multi-window display, the processor 39 detects the shape of each window. If the window has a shape other than a rectangle, the processor 39 controls the writing of the window image into the bitmap memory 36. If the window has a rectangular shape, the processor 39 controls the writing of the window image into the image memory of the window image generation unit 35.
[0140]
Further, when the window image is written in the bitmap memory 36 or the image memory, the transparent color image drawing unit 37 clears the transparent color data in an area other than the area where the window image is written as described with reference to FIG. Write control.
[0141]
Next, when the window shape is a shape other than a rectangle, and this window image is written in each bitmap memory 36, the processor 39 reads the window image from each bitmap memory 36 and sends it to the address generation circuit 35. Through the image memory of the window image generation unit 35. As a result, each window image having a window shape other than a rectangle is synthesized on the image memory to form a multi-window image.
[0142]
Next, when a multi-window image is formed on the image memory, the processor 39 reads out the multi-window image via the address generation circuit 35 and supplies it to the monitor device 4. Thereby, a window image having a window shape other than the rectangle is displayed in a multi-window.
[0143]
On the other hand, when the window shape is rectangular, and this window image is written in the image memory of the window image generation unit 35, a multi-window image composed of a plurality of rectangular window images is already formed in the image memory. Will be. Therefore, the processor 39 reads out and controls the multi-window image written in the image memory via the address generation circuit 35 and supplies it to the monitor device 4. As a result, a rectangular window-shaped window image is displayed in multiple windows.
[0144]
Next, the operation of detecting the window where the cursor is located from among the windows displayed in the multi-window as described above will be described.
[0145]
First, when the window shape is a shape other than a rectangle and a window image is written in each bitmap memory 36, the processor 39 will be described with reference to the flowchart of FIG. 9 in the description of the third embodiment. The window in which the cursor is located is detected from the windows having a shape other than the rectangle by the same detection operation as that performed.
[0146]
That is, since the description is duplicated, in brief, in this case, the processor 39 detects the coordinate data of each window having a shape other than the rectangle displayed in the multi-window in order of display priority (step S22), and these are displayed as a cursor. (Step S23), it is detected whether the window image where the cursor is located is an image of transparent color data (or an image located outside the window) (step S24). If the window image where the cursor is located is not an image of transparent color data, the window is detected as the window where the cursor is located (step S25).
[0147]
On the other hand, when the window shape is rectangular and the window image is written in the image memory of the window image generation unit 35, the processor 39 uses the flowchart of FIG. 4 in the description of the first embodiment. The window in which the cursor is located is detected from the windows having the rectangular shape by the same detection operation as described above.
[0148]
Since this also overlaps with the description, in this case, the processor 39 first detects the coordinate data of the cursor (step S11), and obtains the coordinate data at both ends of the diagonal line of each window written in the image memory. Detection is performed in the order of display priority (step S12). Then, by comparing the coordinate data of each window with the coordinate data of the cursor, it is determined whether or not the above conditions (Xj ≦ X0 ≦ Xj + 1, Yj ≦ Y0 ≦ Yj + 1) are satisfied (step S13). Is satisfied, it is determined that the cursor is positioned in the window (step S3 shown in FIG. 3).
[0149]
As described above, the multi-window display device according to the fourth embodiment performs multi-window display and cursor detection using the bitmap memory 36 when the window shape is other than a rectangle, and the window shape is rectangular. In the case of, multi-window display and cursor detection are performed using the image memory of the window image generation unit 35. As a result, optimal cursor detection can be performed according to the window shape to be displayed in a multi-window, cursor detection can be performed more accurately and at high speed, and the same as the multi-window display device according to each of the above-described embodiments. An effect can be obtained.
[0150]
In the description of each embodiment described above, the detection of the window where the cursor is located is performed by hardware. However, this is on condition that each unit is operated in synchronization with the display scanning of the monitor device. Of course, it may be performed in software, and various modifications can be made according to the design or the like as long as the technical idea of the present invention is not deviated.
[0151]
【The invention's effect】
The cursor detection device according to the present invention can accurately and quickly detect a window where a cursor is located from a plurality of windows displayed in a multi-window regardless of the number, shape, complexity, and the like of the windows.
[0152]
Therefore, when the cursor detection device is provided in a computer device or the like that executes an application program for each window, the responsiveness can be improved, and a more preferable user interface can be provided.
[Brief description of the drawings]
FIG. 1 is a block diagram of a first embodiment in which a cursor detection device according to the present invention is applied to a multi-window display device using a display time composition method.
FIG. 2 is a block diagram of a vertical position detector and a horizontal position detector provided in the multi-window display device according to the first embodiment.
FIG. 3 is a flowchart for explaining a detection operation of a window where the cursor is located in the multi-window display device according to the first embodiment.
FIG. 4 is a flowchart of a subroutine for explaining a detection operation of a window where a cursor is located in the multi-window display device according to the first embodiment.
FIG. 5 is a block diagram of a second embodiment in which the cursor detection device according to the present invention is applied to a multi-window display device using a display time composition method.
FIG. 6 is a block diagram of a window detection unit provided in the multi-window display device according to the second embodiment.
FIG. 7 is a block diagram of a third embodiment (and a fourth embodiment) in which the cursor detection device according to the present invention is applied to a drawing multi-window display device.
FIG. 8 is a schematic diagram for explaining transparent color data drawn in a bitmap memory by a transparent color image drawing unit provided in the multi-window display device according to the third embodiment.
FIG. 9 is a flowchart for explaining a detection operation of a window where a cursor is positioned in the multi-window display device according to the third embodiment.
FIG. 10 is a diagram for explaining both a drawing time composition method and a display time composition method for performing multi-window display;
FIG. 11 is a block diagram of a conventional computer system that performs multi-window display.
FIG. 12 is a schematic diagram for explaining an operation of detecting a window where a cursor is located from among windows displayed in a multi-window in a conventional computer system.
FIG. 13 is a schematic diagram for explaining an operation of detecting a window where a cursor is located from each window having a shape other than a rectangular shape displayed in a multi-window in a conventional computer system.
[Explanation of symbols]
  DESCRIPTION OF SYMBOLS 1 ... Window image generation part, 2 ... Window detection part, 3 ... Data selector
  4 ... monitor device, 5 ... processor, 6 ... address generation circuit, 7 ... image memory
  8 ... Mask circuit, 9 ... Vertical position detection circuit, 10 ... Horizontal position detection circuit
  11 ... AND gate, 12 ... Priority encoder
  27 ... Transparent color image drawing unit, 28 ...Processor29 ... Comparator
  30 ... Transparent color detection circuit, 31 ... Transparent color image register
  36 ... Bitmap memory

Claims (5)

The window image information to be displayed in each window is written in a plurality of storage means corresponding to each window, and the window image information written in each storage means is read out simultaneously in synchronization with the display scanning of the display means. Each window image information read from each storage means is selected for each pixel in accordance with the display priority order of the windows and supplied to the display means from among a plurality of windows displayed in a multi-window by a display-time composition method. A cursor detection device for detecting a window where a cursor is positioned on a display screen,
Cursor position detecting means for performing processing for detecting the position of the cursor on the display screen in synchronization with the display scanning of the display means;
Window image detecting means for performing processing for detecting whether or not the information read from each storage means is window image information displayed in the window in synchronization with display scanning of the display means; ,
The respective detection outputs from the window image detection means and the cursor position detection output as information indicating the timing of the current cursor display position from the cursor position detection means are synchronized with the display scanning of the display means. And a coincidence detecting means for detecting whether or not the cursor is positioned in the window image of the window image information detected by the window image detecting means,
When only one detection output indicating that the cursor is positioned in the window image is supplied from the coincidence detection means, the storage means storing the window image information is detected and stored in the storage means. When a window for displaying window image information is detected as a window where the cursor is located, and a plurality of detection outputs indicating that the cursor is located within the window image are supplied from the coincidence detecting means, each window image information is displayed. The storage means storing the window image information of the window having the highest display priority among the windows to be detected is detected, and the window displaying the window image information stored in the storage means is detected as the window where the cursor is positioned. And a window detecting means. A plurality of window writing control means for writing and controlling a plurality of window image information to one storage means
When a plurality of window image information is written in one storage means by the multiple window writing control means, the window detection means is a storage means in which the window image information of the window where the cursor is located is stored. after the detection, the display position of multiple windows with multiple windows image information stored in said storing means, detects the display priority in descending order of the respective windows, the display position of each window, the cursor position detector 2. The cursor detection apparatus according to claim 1, wherein the cursor is sequentially compared with the display position of the cursor detected by the means, and the window first detected as the cursor is positioned is detected as the window where the cursor is positioned. The window image information to be displayed in each window is written in a plurality of storage means corresponding to each window, and the window image information written in each storage means is read out simultaneously in synchronization with the display scanning of the display means. Each window image information read from each storage means is selected for each pixel in accordance with the display priority order of the windows and supplied to the display means from among a plurality of windows displayed in a multi-window by a display-time composition method. A cursor detection device for detecting a window where a cursor is positioned on a display screen,
Cursor position detecting means for performing processing for detecting the position of the cursor on the display screen in synchronization with the display scanning of the display means;
Discriminating information writing means for writing discriminating information discriminating with respect to the window image information in an area other than the area where the window image information is written in each storage means,
Window image detection means for performing processing for detecting the window image information from the window image information and the discrimination information read from each storage means in synchronization with display scanning of the display means;
Each detection output as information indicating whether or not the window image information is from the window image detection means, and the cursor position as information indicating the timing of the current cursor display position from the cursor position detection means A coincidence detecting means for detecting whether or not the cursor is positioned in the window image detected by the window image detecting means by comparing the detection output with the display scanning of the display means;
When only one detection output indicating that the cursor is located in the window image is supplied from the coincidence detection means, the window displaying the window image information is detected as the window where the cursor is located, and the coincidence detection means When a plurality of detection outputs indicating that the cursor is located in the window image is supplied from among the windows displaying the window image information, the window having the highest display priority is detected as the window where the cursor is located. And a window detecting means. Writing each window image information to be displayed on each window in the storage unit, the multi-window by drawing upon the synthesis method of supplying the read display means in synchronism with the display scanning of the monitor device each window image information written in 該記憶means A cursor detection device for detecting a window in which a cursor on a display screen is located from a plurality of displayed windows,
A plurality of temporary storage means for respectively writing window image information to be displayed in each window before being written to the storage means;
Discrimination information writing means for writing and controlling discrimination information that can be discriminated with respect to the window image information in an area other than the area in which the window image information is written in each temporary storage means;
Cursor position detecting means for detecting the position of the cursor on the display screen;
High display priority of a window that displays each window image sequentially, each read each window image information and determination information from the temporary storage means, the upper Symbol cursor position information indicating a position coordinate of the cursor is detected by the cursor position detector It is detected whether the information at the cursor position indicated by is the window image information or the discrimination information, and the window having the window image information first determined that the information at the cursor is the window image information is And a window detecting means for detecting as a window where the cursor is located. If the window shape during multi-window display was rectangular shape, the window image information of the respective windows to the write control in the storage means, when the window shape is a shape other than rectangular shape, each of its Write control means for controlling the window image information of the window to be written in each temporary storage means,
When the window image information of the rectangular window shape is written in the storage unit, the window detection unit displays the display position of each window based on each window image information written in the storage unit. detected in order of priority, the display position of each window, the cursor position detecting means sequentially comparing the display position of the detected cursor by the first detected window as the cursor is located, the cursor detected as a window located, rectangular if the window shape window image information other than the shape is written to the temporary storage unit above order high display priority of a window that displays each window image, each temporary memory means reading each window image information and determination information from the upper Symbol cursor position detection Information at the cursor indicated by the cursor position information indicating the position coordinates of the detected cursor to detect whether the identification information is the window image information by means, when information in which the cursor is located is a window image information 5. The cursor detection apparatus according to claim 4, wherein a window having the window image information determined first is detected as a window where the cursor is located.

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