KR100678900B1 - Apparatus and method for displaying graphic object concurrently - Google Patents

Abstract

The present invention relates to an apparatus and method for simultaneously displaying a graphic object, and to prevent a transient phenomenon of a window system caused by a visually recognized event interval when a plurality of graphic objects are displayed on a screen by an event handler. To this end, a double buffering technique is used. The present invention relates to an apparatus and method for simultaneously displaying graphic objects displaying all graphic objects after capturing a time point at which an event is delivered to the last graphic object.

An apparatus for simultaneously displaying a graphic object according to an embodiment of the present invention includes an event check unit for checking whether an event for a display of a graphic object occurs, a buffer for storing the graphic object processed according to the event, and the occurrence And a determination unit for confirming the number of confirmed events and the number of processed graphic objects, and a display unit for displaying the stored graphic objects according to the verification result.

Events, messages, graphic objects, event handlers, double buffering

Description

Apparatus and method for displaying graphic object concurrently}

1 is a view showing the structure of a conventional window application program.

2 is a block diagram illustrating an apparatus for simultaneously displaying graphic objects according to an exemplary embodiment of the present invention.

3A is a flowchart illustrating a count increase by confirming an event occurrence according to an embodiment of the present invention.

3B is a flowchart illustrating a process of simultaneously displaying graphic objects according to an embodiment of the present invention.

4 is a diagram illustrating displaying a plurality of windows using one variable according to an embodiment of the present invention.

5 is a diagram illustrating displaying a plurality of windows using a plurality of variables according to an embodiment of the present invention.

6 is a block diagram illustrating a digital TV for simultaneously displaying graphic objects according to an embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

210: event check unit 220: determination unit

230: display unit 240: buffer

The present invention relates to an apparatus and method for simultaneously displaying graphic objects. More particularly, the present invention relates to transients of a window system generated due to visually recognized event intervals when a plurality of graphic objects are displayed on a screen by an event handler. In order to prevent the phenomenon, a double buffering technique is used. The present invention relates to an apparatus and method for simultaneously displaying graphic objects displaying all graphic objects after capturing a time point at which an event is delivered to the last graphic object.

As functions of home appliances increase and become more complicated, a window system may be used to effectively output graphic objects on a screen.

Various home appliances such as digital TVs, refrigerators with home bars, and home pads provide visual services to the user, thereby allowing the user to use the product more conveniently and intimately. Therefore, a window system that shows excellent performance for graphic output is applied to home appliances.

In general, a window system uses events to communicate with an application, and the application can run on the window system by defining handlers for the events.

Thus, unlike procedurally structured programs, Windows programs are called event driven or message driven programs.

1 is a view showing the structure of a conventional window application program.

As shown in the figure, a window application (hereinafter referred to as an application) 10 includes a message loop 12 and a window procedure 13, which are processed in each program. . In general, the application program 10 is composed of at least one window, and there is a window called a main window. In addition, if the application 10 uses several windows, the messages generated in each window are transmitted to the window procedure 13 by the message loop 12.

When the application program having the window 10 is executed, one message queue 11 is allocated to each application program 10. Next, when an event occurs in a window of each application 10, the Windows operating system inserts a message (event) generated in the message queue 11 of the application 10. At this time, the application program 10 receiving the message processes the message delivered by the Windows operating system in the message loop 12 and delivers the message to the window procedure 13. The message passed to the window procedure 13 is that the appropriate processing routine specified for processing the message in the window procedure 13 is performed.

When a graphic object is displayed on the screen, an event according to each object is generated and each object is displayed on the screen by the window procedure 13. In this case, when a plurality of objects are displayed on a poor-performance system, the display interval of the objects may be visually recognized according to the event occurrence interval or the processing capability of the window procedure. In order to prevent this, double buffering The technique is used.

Double buffering does not display graphic objects directly on the screen, but first displays them in a buffer (memory) and later on the screen.

Here, a problem in applying double buffering is that when the main window and the lower layer windows are not output to the screen by one thread, the output order is unclear and it is difficult to capture when they are all displayed in the buffer. .

Japanese Patent Laid-Open No. Hei 10-011258 discloses a system in which, when a user opens a new window and is typing text into an existing window, the user keeps the focus until the new window is clicked so that the user can delay the focus transition to the new window. . However, this does not mean that graphic objects are not simultaneously output on the screen due to the transient phenomenon of the window, and are not useful in home appliances such as digital TVs.

According to the present invention, when a plurality of graphic objects are displayed on a screen by an event handler, an object of the present invention is to display all graphic objects after capturing a time point at which an event is delivered and processed in the last graphic object.

The object of the present invention is not limited to the above-mentioned object, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, an apparatus for simultaneously displaying a graphic object according to an embodiment of the present invention, an event check unit for confirming whether or not an event for the display of the graphic object, and the graphic object processed according to the event A buffer for storing, a determination unit for confirming the number of occurrence of the event confirmed and the number of the processed graphic object, and a display unit for displaying the stored graphic object in accordance with the confirmation result.

According to an embodiment of the present invention, a method of simultaneously displaying a graphic object includes determining whether an event for a display of a graphic object occurs, storing the graphic object processed according to the event, and confirming the occurrence of the event. Confirming the number of events and the number of processed graphic objects, and displaying the stored graphic objects according to the verification result.

Specific details of other embodiments are included in the detailed description and the drawings.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, only the embodiments are to make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram illustrating an apparatus for simultaneously displaying graphic objects according to an exemplary embodiment of the present invention.

The apparatus for simultaneously displaying graphic objects includes an event checker 210, a determiner 220, a display 230, and a buffer 240.

The event check unit 210 checks whether an event for the display of the graphic object occurs.

Here, the graphic object is an object which is at least one of a window, a frame, a dialog, a button, a check box, a radio box, a list, a scroll bar, and a menu bar. Each graphic object is processed according to an event generated by a thread.

In this case, since each graphic object may belong to a different thread or a different process, it may not be known exactly when the event is processed.

Windows applications typically consist of one or more windows, with message loops and window procedures. In addition, one or more message queues are allocated per application. In most cases, one message queue is allocated per message loop.

Next, when an event occurs for the display of a graphic object in the application's window, the Windows operating system or window manager puts the message in the application's message queue. The event check unit 210 checks whether an event for displaying a graphic object is output in the message queue.

At this point, the application that receives the message processes the message delivered by the Windows operating system in a message loop and passes it to the window procedure. The message about the display of the graphic object passed to the window procedure is performed by a suitable processing routine specified for processing the message.

The buffer 240 temporarily stores the graphic object processed by the window procedure according to whether an event confirmed by the event checker 210 occurs.

Here, storage does not simply store data of a graphic object in memory, but refers to a state in which a graphic object is drawn on the memory by allocating a memory for an area to be actually displayed on the screen and is not output only to the screen.

The determination unit 220 checks the number of occurrences of the event confirmed by the event checker 210 and the number of graphic objects processed by the window procedure.

In practice, the determination unit 220 confirms the number of occurrences of confirmed events and the number of processed graphic objects using variables stored in a separate area, and the value of the variable each time the event checker 210 confirms occurrence of an event. Increases the value by 1 and decreases the value of the variable by 1 whenever the graphic object is processed by the window procedure.

Thus, since the time point at which the value of the variable becomes 0 is the time point when the processing of all graphic objects to be displayed on the screen is completed, the determination unit 220 displays the graphic object stored in the buffer 240 through the display unit 230. Display on the screen.

3A to 3B are flowcharts illustrating a process of simultaneously displaying graphic objects according to an exemplary embodiment of the present invention.

If an event occurs for the display of a graphic object, such as when the application is initially running, when certain areas of the main window need to be redrawn, or when the InvalidateRect function is called, the Windows operating system raises the event that occurred in the application's message queue. To insert (S310), the event check unit 210 checks whether or not an event occurs for the display of the graphic object by using it (S320).

Accordingly, the determination unit 220 increases and stores the variable set in the separate area by 1 with respect to the number of confirmed events that occur (S330).

The graphic object is processed according to the message transmitted to the window procedure (S340). Accordingly, the determination unit 220 decreases and stores a variable set in a separate area by 1 for the number of processed graphic objects (S340). S350).

In operation S360, the graphic object is stored in the buffer 240.

The process of confirming the event occurrence and the increase or decrease of the variable according to the processing of the graphic object are determined by the number of graphic objects configured by the application and output on the screen. The determination unit 220 determines that the value of the variable is 0. Check (S370). Since the time point at which the value of the variable becomes 0 is the processing time of all graphic objects to be displayed on the screen, the determination unit 220 displays the graphic object stored in the buffer 240 on the screen through the display unit 230. (S380).

4 is a diagram illustrating displaying a plurality of windows using one variable according to an embodiment of the present invention.

A plurality of windows may be displayed by one application program or a plurality of application programs. FIG. 4 is a diagram illustrating displaying a plurality of windows 410 and 420 using one variable 430.

Window A 410 is a window composed of seven graphic objects in one main window and six buttons, and window B 420 is a window composed of three graphic objects in one main window and two buttons.

Here, the variables for managing the number of event occurrence checks and the number of graphic object processing for each window are set as global variables (Count _{_total} ).

When an event occurs to display a graphic object for the window A 410, the child window of the window A 410, the window B 420, or the child window of the window B 420, the event checker 210 determines the graphic object. Check whether the event occurs on the display.

Thus, when the occurrence of the event is confirmed by the event checker 210, Count _{_total} 430 increases by one, and when the graphic object is processed by the window procedure, Count _{_total} 430 decreases by one.

The value of the global variable Count _{_total} (430) is calculated regardless of the window, and before the result is 0, the window A 410, the child window of window A 410, window B 420, and window B 420 The child windows of are stored in the buffer 240 and are not displayed on the screen. When the result of the global variable Count _{_total} 430 becomes 0, the window A 410, the window A child window, the window B 420 and The child windows of window B 420 are displayed at the same time.

5 is a diagram illustrating displaying a plurality of windows using a plurality of variables according to an embodiment of the present invention.

A plurality of windows may be displayed by one application program or a plurality of application programs. FIG. 5 is a diagram illustrating displaying a plurality of windows 510 and 520 using a plurality of variables 530 and 540.

Window A 510 is a window composed of seven graphic objects in one main window and six buttons, and window B 520 is a window composed of three graphic objects in one main window and two buttons.

Here, the variables for managing the number of event occurrence checks and the number of graphic object processing for each window are shown to be set to a local variable, window A (510) is shown to be set to the local variable Count _{_A} (530), window B ( 520 shows that the local variable Count _{_B} 540 is set.

When an event occurs to display a graphic object for a window A 510, a child window of window A 510, a window B 520, or a child window of window B 520, the event checker 210 may display the graphic object. It is to check whether or not an event occurs for the display of.

Accordingly, the determination unit 220 searches for which window of the event is confirmed to occur. Thus, if the event that has been confirmed to occur is an event of a child window of the window A 510 or the window A 510, the count _{_A} 530 is increased by one, and the event of the child window of the window B 520 or the window B 520 is increased. If so, increase the Count _{_B} (540) by one. When the graphic object is processed by the window procedure, _{Count_A} 530 or _{Count_B} 540 decreases by one.

In this way, the value of the local variable Count _{_ A} 530 or Count _{_ B} 540 is calculated according to the window and whether or not to display is determined according to each calculation result. That is, even though the value of Count _{_A} 530, which is a local variable of Window A 510, is not 0, if the value of Count _{_B} 540, which is a local variable of Window B 520, is 0, the window A 510 is still buffered. The window B 520 is stored on the screen 240 and displayed on the screen through the display 230.

6 is a block diagram illustrating a digital TV for simultaneously displaying graphic objects according to an embodiment of the present invention.

Since a typical desktop or laptop has a relatively high performance, window transients rarely occur. However, since a consumer electronics product does not perform as well as a desktop or laptop, a window transient may frequently occur.

Fig. 6 shows that a device for simultaneously displaying a graphic object of the present invention is attached to a digital TV.

The digital TV further includes an image receiver 610 and a decoder 620 in addition to a device for simultaneously displaying graphic objects.

The image receiver 610 receives a compressed digital image received by wire or wirelessly, and may include a buffer for smooth flow of the received image. The compressed digital image received by the image receiver 610 is transmitted to the decoder 620.

The decoding unit 620 decompresses the compressed digital image received from the image receiving unit 610 to implement the original image, and may further perform digital image processing. The original image implemented by the decoding unit 620 is output to the screen through the display unit 230.

As such, the digital TV is not only used for TV reception, but also for the convenience of other users. In particular, in the case of a digital TV on a home network, a digital TV service controls not only various digital broadcasting services but also devices that make up the home network. It is also used to. In this case, a graphic user interface is used to allow a user to perform such a task, and window transients may occur in a digital TV having relatively low computing power.

The display 230 may display a graphic object even while displaying the broadcast content. The display 230 transmits the event checked by the event checker 210 to the determiner 220.

The determination unit 220 checks the number of generated events and the number of processed graphic objects and applies the number to a predetermined variable, thereby storing the corresponding graphic object in the buffer 240 according to the value of the variable or displaying the display unit. The graphic object stored in the buffer 240 is displayed on the screen through the 230.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

According to the apparatus and method for simultaneously displaying the graphic object of the present invention as described above, there are one or more of the following effects.

First, when a plurality of graphic objects are displayed on the screen by an event handler, all graphic objects are displayed after capturing the point of time when the event is delivered to the last graphic object, so that even a poor performance system can simultaneously display a plurality of graphic objects. There is this.

Claims (8)

An event check unit for checking whether an event for display of the graphic object occurs; A buffer to store the graphic object processed according to the event; A determination unit to confirm the number of occurrences of the confirmed event and the number of processed graphic objects; And And simultaneously displaying the graphic object including a display unit configured to display the stored graphic object according to the verification result. The method of claim 1, The graphic object is A device that simultaneously displays graphical objects that are at least one of windows, frames, dialogs, buttons, check boxes, radio boxes, lists, scroll bars, and menu bars. The method of claim 1, The determination unit And displaying a graphic object simultaneously identifying the number of occurrences of the confirmed event and the number of processed graphic objects using variables stored in a separate area. The method of claim 3, The determination unit When a graphic object is implemented by a plurality of applications, a graphic object for confirming the number of confirmed events and the number of processed graphic objects by selectively setting a variable for all graphic objects or a variable for each application. Display devices at the same time. (a) checking whether an event for display of the graphic object has occurred; (b) storing the graphic object processed according to the event; (c) confirming the number of generated events and the number of processed graphic objects; And and (d) displaying the stored graphic objects according to the verification result. The method of claim 5, The graphic object is A method of simultaneously displaying graphical objects that are at least one of windows, frames, dialogs, buttons, check boxes, radio boxes, lists, scroll bars, and menu bars. The method of claim 5, Step (c) is And confirming the number of occurrences of the confirmed event and the number of processed graphic objects using previously stored variables. The method of claim 7, wherein Step (c) is In the case where the graphic object is implemented by a plurality of applications, a step of confirming the number of confirmed events and the number of processed graphic objects by selectively setting a variable for all graphic objects or a variable for each application. How to display graphics objects that contain simultaneously.

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