CN111523288B - Display method and device for aerial view of PDF document - Google Patents
Display method and device for aerial view of PDF document Download PDFInfo
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- CN111523288B CN111523288B CN202010329254.3A CN202010329254A CN111523288B CN 111523288 B CN111523288 B CN 111523288B CN 202010329254 A CN202010329254 A CN 202010329254A CN 111523288 B CN111523288 B CN 111523288B
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Abstract
The invention provides a display method and a device for a bird's eye view of a PDF document, wherein the method comprises the following steps: displaying a front view of a target PDF file in a first display area of a target application, and displaying a bird's-eye view of the target PDF file in a second display area of the target application, wherein the bird's-eye view is a picture obtained by shrinking an original view of the target PDF file by a first scale, and all or part of the original view is displayed in the front view; and displaying a target view area corresponding to the selected operation in the original view in the main view according to the selected operation of the aerial view. According to the invention, the PDF document is displayed in the front view, and the aerial view of the PDF document is displayed at the same time, so that the display content of the PDF can be flexibly positioned through the front view and the aerial view, the positioning operation of a design engineer on a large drawing is greatly facilitated, and the aesthetic efficiency of the design engineer is improved.
Description
Technical Field
The invention relates to the field of document processing, in particular to a display method and a display device for a bird's eye view of a PDF document.
Background
There is currently a trend in paperless offices, PDF has become an important delivery format for digital esthetics as the most common printing format. The mainstream PDF readers on the market have poor professional properties, and cannot meet the operation habits of operators, for example, when a design engineer in the construction industry examines large drawings and single-page drawings in PDF format, the drawing needs to be adapted through complicated operations, such as zooming in or zooming out the drawing with a ctrl+mouse wheel, moving the drawing with a left mouse button, and clicking the full-view display of a toolbar. Thereby severely affecting the aesthetic efficiency of the design engineer.
Disclosure of Invention
The embodiment of the invention provides a method and a device for displaying a PDF document, which at least solve the problems that the PDF reader in the related art is poor in professional and cannot meet the operation behavior habit of a design engineer on PDF format drawings, so that the drawing examination efficiency of the design engineer is seriously influenced.
According to an embodiment of the present invention, there is provided a display method of a PDF document, including: displaying a front view of a target PDF file in a first display area of a target application, and displaying a bird's-eye view of the target PDF file in a second display area of the target application, wherein the bird's-eye view is a picture obtained by shrinking an original view of the target PDF file by a first scale, and all or part of the original view is displayed in the front view; and displaying a target view area corresponding to the selected operation in the original view in the main view according to the selected operation of the aerial view.
Optionally, the front view in the first display area is displayed according to a PDF coordinate system, and the bird's eye view in the second display area is displayed according to a Windows coordinate system.
Optionally, the bird's eye view includes a plurality of sub-areas divided by M rows and N columns, where M and N are both positive integers.
Optionally, a corresponding digital identifier is displayed on each sub-region of the plurality of sub-regions.
Optionally, according to a selected operation on the aerial view, displaying a target view area corresponding to the selected operation in the original view in the main view includes: determining the selected subarea in the aerial view according to the corresponding relation between the input number keys and the number identifiers of the subareas; obtaining a target view area in the main view corresponding to a sub-area in the aerial view through coordinate transformation from a Windows coordinate system to a PDF coordinate system; and adjusting the target view area according to the display proportion of the first display area, and displaying the target view area in the front view.
Optionally, according to a selected operation on the aerial view, displaying a target view area corresponding to the selected operation in the original view in the main view includes: acquiring a first coordinate position of a cursor when clicking in the aerial view; obtaining a second coordinate position in the main view corresponding to the first coordinate position in the bird's-eye view through coordinate transformation from a Windows coordinate system to a PDF coordinate system; and determining the target view area by taking the second coordinate position as a center according to the display proportion of the first display area, and displaying the target view area in the front view.
Optionally, the method further comprises: acquiring a first area displayed in the front view currently; calculating the first region into a second region in the aerial view through coordinate transformation from a PDF coordinate system to a Windows coordinate system; and drawing the boundary of the second area in the bird's eye view to highlight the second area.
Optionally, the method further comprises: and selecting or setting the number and arrangement modes of the subareas in the aerial view.
According to another embodiment of the present invention, there is provided a display device of a PDF document including: a first display module, configured to display a front view of a target PDF file in a first display area of a target application, and display a bird's-eye view of the target PDF file in a second display area of the target application, where the bird's-eye view is a picture obtained by shrinking an original view of the target PDF file by a first scale, and all or part of the original view is displayed in the front view; and the second display module is used for displaying a target view area corresponding to the selected operation in the original view in the front view according to the selected operation on the aerial view.
According to a further embodiment of the invention, there is also provided a storage medium having stored therein a computer program, wherein the computer program is arranged to perform the steps of any of the method embodiments described above when run.
According to a further embodiment of the invention, there is also provided an electronic device comprising a memory having stored therein a computer program and a processor arranged to run the computer program to perform the steps of any of the method embodiments described above.
In the embodiment of the invention, the PDF document is displayed in the front view, and the aerial view of the PDF document is displayed at the same time, so that the display content of the PDF can be flexibly positioned through the front view and the aerial view, the positioning operation of a design engineer on a large drawing is greatly facilitated, and the drawing examination efficiency of the design engineer is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a flowchart of a method of displaying a PDF document according to an embodiment of the invention;
FIG. 2 is a flowchart of a method of displaying a PDF document according to another embodiment of the invention;
FIG. 3 is a schematic overall interface diagram according to an embodiment of the invention;
FIG. 4 is a schematic diagram of a dynamic interface according to an embodiment of the invention;
fig. 5 is a schematic diagram of a display device of a PDF document according to an embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the drawings in conjunction with embodiments. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
Example 1
In this embodiment, a method for displaying a PDF document is provided, and fig. 1 is a flowchart of a method according to an embodiment of the present invention, as shown in fig. 1, where the flowchart includes the following steps:
step S102, displaying a front view of a target PDF file in a first display area of a target application, and displaying a bird 'S-eye view of the target PDF file in a second display area of the target application, wherein the bird' S-eye view is a picture obtained by shrinking an original view of the target PDF file by a first proportion, and all or part of the original view is displayed in the front view;
step S104, displaying a target view area corresponding to the selected operation in the original view in the main view according to the selected operation on the bird' S eye view.
In this embodiment, the front view in the first display area is displayed according to a PDF coordinate system, and the bird's eye view in the second display area is displayed according to a Windows coordinate system.
In this embodiment, the bird's eye view includes a plurality of sub-areas divided by M rows and N columns, where M and N are both positive integers.
In this embodiment, a corresponding digital identifier is displayed on each of the plurality of sub-regions.
In step S104 in the present embodiment, the bird' S eye view may be subjected to the following selection operation by a numeric keyboard or a mouse.
Determining the selected subarea in the aerial view according to the corresponding relation between the input number keys and the number identifiers of the subareas; obtaining a target view area in the main view corresponding to a sub-area in the aerial view through coordinate transformation from a Windows coordinate system to a PDF coordinate system; and adjusting the target view area according to the display proportion of the first display area, and displaying the target view area in the front view.
Acquiring a first coordinate position of a cursor when clicking in the aerial view; obtaining a second coordinate position in the main view corresponding to the first coordinate position in the bird's-eye view through coordinate transformation from a Windows coordinate system to a PDF coordinate system; and determining the target view area by taking the second coordinate position as a center according to the display proportion of the first display area, and displaying the target view area in the front view.
In this embodiment, the method may further include: acquiring a first area displayed in the front view currently; calculating the first region into a second region in the aerial view through coordinate transformation from a PDF coordinate system to a Windows coordinate system; and drawing the boundary of the second area in the bird's eye view to highlight the second area.
In this embodiment, the method may further include: and selecting or setting the number and arrangement modes of the subareas in the aerial view.
In the embodiment of the invention, the PDF document is displayed in the front view, and the aerial view of the PDF document is displayed at the same time, so that the display content of the PDF can be flexibly positioned through the front view and the aerial view, the positioning operation of a design engineer on a large drawing is greatly facilitated, and the drawing examination efficiency of the design engineer is improved.
In order to facilitate understanding of the technical solution provided by the present invention, the following detailed description will be provided with reference to the embodiments of the specific application scenario.
Example 2
The present embodiment is described taking a graphic document of PDF as an example. As shown in fig. 2, the display method of the PDF drawing provided in this embodiment includes the following steps:
in step S201, when a PDF-format drawing file is double-clicked to open the PDF drawing, the PDF drawing is displayed in the front view, and the bird' S eye view of the PDF document is displayed in the lower left corner portion of the display interface, as shown in fig. 3. The bird's eye view displays the entire contents of the PDF document in a thumbnail.
Step S202, a display mode of the bird' S eye view is selected. The bird's-eye view may be divided into M rows and N columns of cells, and the display mode of the bird's-eye view may be selected by a label thereon. In this embodiment, three display modes of the bird's eye view are available: 3*3, 2 x 2 and hand drawn. When different labels are clicked, the bird's eye view displays the corresponding cell arrangement mode through zooming.
For example, when the (1) 3×3 tab is clicked, the Width value of the PDF document is the main view port Width 3 (Width representation), and the Height value of the PDF document is the main view port Height 3 (Height representation). The pixel Width of the PDF document is Width-100%, and the pixel Width of the PDF document is Height-100%. At this time, the Width is divided by Width-100% to obtain a lateral proportion x-scale, and the Height is divided by Height-100% to obtain a longitudinal proportion y-scale. And taking the smaller value of the x-scale and the y-scale as the scaling scale of the PDF document.
In step S203, a number is displayed on each cell, and when the corresponding number key is clicked by the keyboard, the main view port drawing is reduced to the size of the cell and PDF content in the corresponding cell is displayed.
In step S204, when a certain cell in the bird' S eye view is clicked, for example, as shown in fig. 4, when a cell with a reference numeral 5 is clicked, PDF content in the cell is enlarged to the front view size and displayed in the front view.
In this embodiment, the main view area follows the PDF coordinate system, namely: when the PDF angle is 0 degree, the lower left angle is the origin of coordinates, the right side of the origin is the X-axis direction, and the upper volume of the origin is the Y-axis direction; when the PDF angle is 90 degrees, the upper left angle is the origin of coordinates, the lower side of the origin is the X-axis direction, and the right side of the origin is the Y-axis direction; when the PDF angle is 180 degrees, the upper right angle is the origin of coordinates, the left side of the origin is the X-axis direction, and the lower side of the origin is the Y-axis direction; when the PDF angle is 270 degrees, the lower right angle is the origin of coordinates, the upper side of the origin is the X-axis direction, and the left side of the origin is the Y-axis direction. The bird's eye view region follows the Windows coordinate system, namely: the upper left corner is the origin of coordinates, the right side of the origin is the X-axis direction, and the lower side of the origin is the Y-axis direction.
The Windows coordinate point in the bird's eye view and the PDF coordinate point in the front view may be correspondingly converted by the following algorithm. The coordinate algorithm of the present embodiment is described as follows:
(1) clicking the aerial view region by a mouse to obtain Windows coordinate points (a, b);
(2) calculating the ratio of the length a in the X-axis direction to the width of the aerial view picture: dividing a by the width of the aerial view picture to obtain scaleX;
(3) calculating the ratio of the length b in the Y-axis direction to the height of the aerial view picture: b, dividing the bird's eye view picture height to obtain scaleY;
(4) calculating coordinate points (c, d) in the PDF main view area corresponding to the points (a, b) in the step (1);
(5) when the PDF angle is 0 degrees, c=width of PDF times scaleX; d = height of PDF multiplied by (1-scaleY);
(6) when the PDF angle is 90 degrees, c=width of PDF times scaleY; d = height of PDF multiplied by scaleX;
(7) when the PDF angle is 180 degrees, c=width of PDF times (1-scaleX); d = height of PDF multiplied by (1-scaleY);
(8) when the PDF angle is 270 degrees, c=width of PDF times (1-scaleY); d = height of PDF multiplied by (1-scaleX);
(9) the PDF front view area coordinates (c, d) are thus calculated.
Step S205, red frame tracking is performed on the corresponding cell of the bird' S eye view. In this embodiment, in the bird's eye view, the ' onpaint ' message function and the ' gdi+ ' graphics processing technology of the Windows window may be used, and in combination with the PDF area displayed in the PDF main view area, the bird's eye view red frame area is converted by coordinates, so that the drawing of the red rectangular pattern is implemented in the bird's eye view. Thereby indicating that the content being displayed in the PDF view is located at a specific location and boundary of the bird's eye view.
From the description of the above embodiments, it will be clear to a person skilled in the art that the method according to the above embodiments may be implemented by means of software plus the necessary general hardware platform, but of course also by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, or a network device, etc.) to perform the method according to the embodiments of the present invention.
Example 3
The embodiment also provides a display device of a PDF document, which is used to implement the foregoing embodiments and preferred embodiments, and is not described in detail. As used below, the term "module" or "unit" may be a combination of software and/or hardware that implements the predetermined functionality. While the means described in the following embodiments are preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.
Fig. 5 is a block diagram of a display device of a PDF document according to an embodiment of the present invention, and the device includes a first display module 10 and a second module 20 as shown in fig. 5.
A first display module 10, configured to display a front view of a target PDF file in a first display area of a target application, and display a bird's-eye view of the target PDF file in a second display area of the target application, where the bird's-eye view is a picture obtained by shrinking an original view of the target PDF file by a first scale, and all or part of the original view is displayed in the front view.
And the second display module 20 is configured to display, in the main view, a target view area corresponding to the selected operation in the original view according to the selected operation on the bird's eye view.
It should be noted that each of the above modules may be implemented by software or hardware, and for the latter, it may be implemented by, but not limited to: the modules are all located in the same processor; alternatively, the above modules may be located in different processors in any combination.
Example 4
An embodiment of the invention also provides a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the method embodiments described above when run.
Alternatively, in the present embodiment, the above-described storage medium may be configured to store a computer program for performing the steps of:
s1, displaying a front view of a target PDF file in a first display area of a target application, and displaying a bird 'S-eye view of the target PDF file in a second display area of the target application, wherein the bird' S-eye view is a picture obtained by shrinking an original view of the target PDF file by a first proportion, and all or part of the original view is displayed in the front view;
and S2, displaying a target view area corresponding to the selected operation in the original view in the front view according to the selected operation of the aerial view.
In the present embodiment, the storage medium may include, but is not limited to: a usb disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing a computer program.
Example 5
An embodiment of the invention also provides an electronic device comprising a memory having stored therein a computer program and a processor arranged to run the computer program to perform the steps of any of the method embodiments described above.
Optionally, the electronic apparatus may further include a transmission device and an input/output device, where the transmission device is connected to the processor, and the input/output device is connected to the processor.
Alternatively, in the present embodiment, the above-described processor may be configured to execute the following steps by a computer program:
s1, displaying a front view of a target PDF file in a first display area of a target application, and displaying a bird 'S-eye view of the target PDF file in a second display area of the target application, wherein the bird' S-eye view is a picture obtained by shrinking an original view of the target PDF file by a first proportion, and all or part of the original view is displayed in the front view;
and S2, displaying a target view area corresponding to the selected operation in the original view in the front view according to the selected operation of the aerial view.
Alternatively, specific examples in this embodiment may refer to examples described in the foregoing embodiments and optional implementations, and this embodiment is not described herein.
It will be appreciated by those skilled in the art that the modules or steps of the invention described above may be implemented in a general purpose computing device, they may be concentrated on a single computing device, or distributed across a network of computing devices, they may alternatively be implemented in program code executable by computing devices, so that they may be stored in a memory device for execution by computing devices, and in some cases, the steps shown or described may be performed in a different order than that shown or described, or they may be separately fabricated into individual integrated circuit modules, or multiple modules or steps within them may be fabricated into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A display method of a PDF file, comprising:
selecting or setting the number and arrangement mode of subareas in a bird's-eye view, wherein the bird's-eye view comprises a plurality of subareas divided according to M rows and N columns, and M and N are positive integers;
displaying a front view of a target PDF file in a first display area of a target application, and displaying a bird's-eye view of the target PDF file in a second display area of the target application, wherein the bird's-eye view is a picture obtained by shrinking an original view of the target PDF file by a first scale, and all or part of the original view is displayed in the front view;
according to the selection operation of the aerial view, displaying a target view area corresponding to the selection operation in the original view in the main view, including: clicking any target subarea in the plurality of subareas, magnifying a target view area corresponding to the target subarea to a main view size, and displaying the target view area in the main view.
2. The method of claim 1, wherein the front view in the first display area is displayed in a PDF coordinate system and the bird's eye view in the second display area is displayed in a Windows coordinate system.
3. The method of claim 2, wherein a corresponding numerical identifier is displayed on each of the plurality of sub-regions.
4. A method according to claim 3, wherein displaying a target view area in the original view corresponding to a selected operation of the bird's eye view in the front view, comprises:
determining the selected subarea in the aerial view according to the corresponding relation between the input number keys and the number identifiers of the subareas;
obtaining a target view area in the main view corresponding to a sub-area in the aerial view through coordinate transformation from a Windows coordinate system to a PDF coordinate system;
and adjusting the target view area according to the display proportion of the first display area, and displaying the target view area in the front view.
5. The method according to claim 2, wherein displaying a target view area corresponding to the selected operation in the original view in the front view according to the selected operation on the bird's eye view, comprises:
acquiring a first coordinate position of a cursor when clicking in the aerial view;
obtaining a second coordinate position in the main view corresponding to the first coordinate position in the bird's-eye view through coordinate transformation from a Windows coordinate system to a PDF coordinate system;
and determining the target view area by taking the second coordinate position as a center according to the display proportion of the first display area, and displaying the target view area in the front view.
6. The method of claim 5, wherein obtaining a second coordinate position in the main view corresponding to the first coordinate position in the bird's eye view by a coordinate transformation from a Windows coordinate system to a PDF coordinate system, comprises:
calculating a proportion scaleX of the length a in the X-axis direction accounting for the width of the aerial view picture and a proportion scaleY of the length b in the Y-axis direction accounting for the height of the aerial view picture in the aerial view according to the first coordinate positions (a, b);
the second coordinate position (c, d) is obtained according to the following formula:
when the angle of the PDF view of the front view is 0 degrees, c=width of PDF view times scaleX, d=height of PDF times (1-scaleY);
when the PDF view angle is 90 degrees, c=width of PDF view times scaleY, d=height of PDF times scaleX;
when the PDF view angle is 180 degrees, c=width of PDF view times (1-scaleX), d=height of PDF view times (1-scaleY);
when the PDF view angle is 270 degrees, c=width of PDF view times (1-scaleY), and d=height of PDF view times (1-scaleX).
7. The method as recited in claim 1, further comprising:
acquiring a first area displayed in the front view currently;
calculating the first region into a second region in the bird's eye view through coordinate transformation from a PDF coordinate system to a Windows coordinate system;
and drawing the boundary of the second area in the bird's eye view to highlight the second area.
8. A display device for a PDF file, comprising:
a first display module, configured to display a front view of a target PDF file in a first display area of a target application, and display a bird's-eye view of the target PDF file in a second display area of the target application, where the bird's-eye view is a picture obtained by shrinking an original view of the target PDF file by a first scale, and displays all or part of the original view in the front view, where the bird's-eye view includes a plurality of sub-areas divided by M rows and N columns, where M and N are both positive integers, and a number and an arrangement manner of the sub-areas in the bird's-eye view are selected or set in advance;
the second display module is configured to display, in the main view, a target view area corresponding to a selected operation in the original view according to the selected operation in the bird's eye view, where the second display module includes: clicking any target subarea in the plurality of subareas, magnifying a target view area corresponding to the target subarea to a main view size, and displaying the target view area in the main view.
9. A computer-readable storage medium, characterized in that the storage medium has stored therein a computer program, wherein the computer program, when executed by a processor, performs the method of any of claims 1 to 7.
10. An electronic device comprising a memory and a processor, characterized in that the memory has stored therein a computer program, the processor being arranged to run the computer program to perform the method of any of the claims 1 to 7.
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| CN202010329254.3A CN111523288B (en) | 2020-04-23 | 2020-04-23 | Display method and device for aerial view of PDF document |
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