CN102855132A - Method and system for selection of graphic objects - Google Patents
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- CN102855132A CN102855132A CN2011101813049A CN201110181304A CN102855132A CN 102855132 A CN102855132 A CN 102855132A CN 2011101813049 A CN2011101813049 A CN 2011101813049A CN 201110181304 A CN201110181304 A CN 201110181304A CN 102855132 A CN102855132 A CN 102855132A
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Abstract
The invention is suitable for the technical field of computer drawing technique and provides a method and a system for selection of graphic objects. The method includes the following steps: obtaining coordinates of the graphic object section points input in a drawing region by a user, obtaining corresponding color values of pixel points of the coordinates in a hidden region and determining the graphic objects selected in the drawing region according to the obtained color value. The drawing region comprises at least one graphic object which has unique identification number. The hidden region is identical with the drawing region in size, position and coordinate system and contains graphic objects corresponding to the drawing region. The graphic objects have different color values corresponding to the identification number of the graphic objects in the drawing region. The method and the system are simple and convenient due to the fact that distance calculation and comparison are not required to be conducted on each graphic object in the drawing region and the obtained coordinates.
Description
Technical field
The invention belongs to the computer drawing technology field, relate in particular to a kind of choosing method and system of Drawing Object.
Background technology
Computer graphics refers to use mapping software and computer hardware, a technology of real time graphic display, aided drawing and design, fast development along with the science and technology of taking as the leading factor with computing machine, computer graphics has entered a lot of fields, become the important means of engineering and scientific research, therefore, higher requirement has all been proposed for draughting accuracy and the speed of mapping software.At present, in the software of existing drawing function, when the user will choose a certain curve in the curve viewing area, need to obtain the coordinate of current mouse point, then this coordinate points is compared search with other curve in the viewing area, thereby the curve of determining to choose is with prompting user.When prior art is chosen object at definite mouse, the coordinate points obtained and every curve in the viewing area need to be calculated distance and comparison, choose the process complexity, calculated amount is large.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of choosing method of Drawing Object, be intended to solve prior art when definite mouse is chosen object, the coordinate points obtained and every curve in the viewing area need to be calculated distance and comparison, choose the process complexity, the problem that calculated amount is large.
The embodiment of the invention is achieved in that a kind of choosing method of Drawing Object, and described method comprises the steps:
Obtain the user at the coordinate of the Drawing Object selected point of drawing area input, described drawing area comprises at least one Drawing Object, and described Drawing Object has unique identification number;
Obtain the color value of pixel correspondence in hidden area of described coordinate, described hidden area is identical with the drawing area size, the position is identical, coordinate system is identical, and comprise the Drawing Object corresponding with drawing area, described each Drawing Object has different color values, and described color value is corresponding with the identification number of drawing area Drawing Object;
According to the described color value that obtains, determine the Drawing Object of choosing at drawing area.
The embodiment of the invention also provides a kind of selecting system of Drawing Object, and described system comprises:
The coordinate acquiring unit is used for obtaining the user at the coordinate of the Drawing Object selected point of drawing area input, and described drawing area comprises at least one Drawing Object, and described Drawing Object has unique identification number;
The color value acquiring unit, be used for obtaining the pixel of described coordinate at color value corresponding to hidden area, described hidden area is identical with the drawing area size, the position is identical, coordinate system is identical, and comprise the Drawing Object corresponding with drawing area, described each Drawing Object has different color values, and described color value is corresponding with the identification number of drawing area Drawing Object;
Choose the unit, for the color value that obtains according to described color value acquiring unit, determine the Drawing Object of choosing at drawing area.
In embodiments of the present invention, by setting up the identical hidden area of the even drawing area of size, position, coordinate system and Drawing Object, and the different color value that has according to each Drawing Object of hidden area, and the corresponding relation of the identification number of this color value and drawing area Drawing Object, determined easily the Drawing Object that the user chooses at drawing area, need not the coordinate points that will obtain and each Drawing Object in the drawing area and calculate distance and comparison, simple, convenient.
Description of drawings
Fig. 1 is the realization flow figure of the choosing method of the Drawing Object that proposes of the invention process one;
Fig. 2 is the realization flow figure of the choosing method of the Drawing Object that proposes of the invention process two;
Fig. 3 is the realization flow figure of the choosing method of the Drawing Object that proposes of the invention process three;
Fig. 4 a is the synoptic diagram of the drawing area of the invention process three propositions;
Fig. 4 b is the synoptic diagram of the hidden area of the invention process three propositions;
Fig. 5 is the structure of the selecting system of the Drawing Object that proposes of the invention process four.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
The embodiment of the invention is by setting up size, position, coordinate system and the identical hidden area of the even drawing area of Drawing Object, and the different color value that has according to each Drawing Object of hidden area, and the corresponding relation of the identification number of this color value and drawing area Drawing Object, determined easily the Drawing Object that the user chooses at drawing area, simple and convenient.
The embodiment of the invention provides a kind of choosing method of Drawing Object, and described method comprises the steps:
Obtain the user at the coordinate of the Drawing Object selected point of drawing area input, described drawing area comprises at least one Drawing Object, and described Drawing Object has unique identification number;
Obtain the color value of pixel correspondence in hidden area of described coordinate, described hidden area is identical with the drawing area size, the position is identical, coordinate system is identical, and comprise the Drawing Object corresponding with drawing area, described each Drawing Object has different color values, and described color value is corresponding with the identification number of drawing area Drawing Object;
According to the described color value that obtains, determine the Drawing Object of choosing at drawing area.
The embodiment of the invention also provides a kind of selecting system of Drawing Object, and described system comprises:
The coordinate acquiring unit is used for obtaining the user at the coordinate of the Drawing Object selected point of drawing area input, and described drawing area comprises at least one Drawing Object, and described Drawing Object has unique identification number;
The color value acquiring unit, be used for obtaining the pixel of described coordinate at color value corresponding to hidden area, described hidden area is identical with the drawing area size, the position is identical, coordinate system is identical, and comprise the Drawing Object corresponding with drawing area, described each Drawing Object has different color values, and described color value is corresponding with the identification number of drawing area Drawing Object;
Choose the unit, for the color value that obtains according to described color value acquiring unit, determine the Drawing Object of choosing at drawing area.
Below in conjunction with specific embodiment realization of the present invention is described in detail:
Embodiment one
The application scenarios of the embodiment of the invention can be that the drawing area of working as mapping software has a plurality of Drawing Objects, when the user wants to choose a certain Drawing Object in a plurality of Drawing Objects, how choose fast by mouse and want the Drawing Object chosen, then can adopt the method for the embodiment of the invention.
Fig. 1 shows the realization flow figure of the choosing method of the Drawing Object that the invention process one proposes, and details are as follows:
In step S101, obtain the user at the coordinate of the Drawing Object selected point of drawing area input, drawing area comprises at least one Drawing Object, and Drawing Object has unique identification number.
In embodiments of the present invention, when the user will obtain certain Drawing Object of drawing area, then in drawing area, click a point on this Drawing Object, with the Drawing Object of determining to choose at drawing area.
In embodiments of the present invention, figure can be used for Drawing Object is carried out unique sign to the identification number of picture, has determined that the identification number of Drawing Object just can be determined the graph of a correspondence object.
In step S102, obtain the color value of pixel correspondence in hidden area of coordinate, hidden area is identical with the drawing area size, the position is identical, coordinate system is identical, and comprise the Drawing Object corresponding with drawing area, each Drawing Object has different color values, and color value is corresponding with the identification number of drawing area Drawing Object.
In embodiments of the present invention, set up a hidden area identical with the drawing area size, that the position is identical, coordinate system is identical, the Drawing Object of all draftings of drawing area all is plotted to this hidden area, and each Drawing Object of drawing all uses different color values.Therefore, when mouse when drawing area moves, the coordinate of the relative drawing area of mouse can find corresponding position coordinates at hidden area equally.
In step S103, according to the color value that obtains, determine the Drawing Object of choosing at drawing area.
In embodiments of the present invention, when the Drawing Object selected point be a plurality of Drawing Objects overlap pixel the time, the color value of then choosing the pixel of last drafting at hidden area is the color value of selected point.The color value that can certainly choose the point that is positioned at top layer is the color value of selected point.
In embodiments of the present invention, by setting up the identical hidden area of the even drawing area of size, position, coordinate system and Drawing Object, and the different color value that has according to each Drawing Object of hidden area, and the corresponding relation of the identification number of this color value and drawing area Drawing Object, determined easily the Drawing Object that the user chooses at drawing area, need not the coordinate points that will obtain and each Drawing Object in the drawing area and calculate distance and comparison, simple, convenient.
Embodiment two
Fig. 2 shows the realization flow figure of the choosing method of the Drawing Object that the invention process two proposes, and details are as follows:
In step S201, obtain the user at the coordinate of the Drawing Object selected point of drawing area input, drawing area comprises at least one Drawing Object, and Drawing Object has unique identification number.
In step S202, obtain the color value of pixel correspondence in hidden area of coordinate, hidden area is identical with the drawing area size, the position is identical, coordinate system is identical, and comprise the Drawing Object corresponding with drawing area, each Drawing Object has different color values, and color value is corresponding with the identification number of drawing area Drawing Object.Identification number.
In step S203, according to the corresponding relation of color value and identification number, determine the identification number of the Drawing Object chosen at drawing area.
In step S204, at drawing area, choosing identification number graph of a correspondence object is the Drawing Object of choosing.
In embodiments of the present invention, when the user will be when drawing area be chosen certain Drawing Object, then can select this object by certain coordinate points that mouse is clicked on this Drawing Object, yet, when the user does not click on Drawing Object, but near the scope of click Drawing Object, then can adopt following steps:
In embodiments of the present invention, among the step S202, the color value of Drawing Object in default color value scope the pass corresponding with identification number is: the color value of Drawing Object is corresponding with identification number in default color value scope.
In embodiments of the present invention, the default color value scope zone that color value corresponding to each Drawing Object and the color value in the adjacent scope of this color value thereof consist of of serving as reasons.
Then specifically comprise among the step S203: search the affiliated default color value scope of color value of obtaining, determine that the identification number corresponding with default color value scope is the identification number of choosing Drawing Object.
In embodiments of the present invention, near color value that can each Drawing Object is corresponding and the color value in the setting range the even identification number of color value is set up corresponding relation, no matter the color value that namely ought obtain is that the color value in the setting range all can be thought correspondingly with the identification number of this Drawing Object near color value corresponding to this Drawing Object or this color value, has avoided user's mouse to click outside Drawing Object and can't choose object.
Embodiment three
In embodiments of the present invention, for convenient, at drawing area, can be with the digital number of the Drawing Object identification number as Drawing Object, at hidden area, can be with the digital number value of the described Drawing Object color value as Drawing Object, wherein, digital number can be the sequence number that Drawing Object is drawn, and also can be according to the sequence number of subscribing the rule establishment, specifically can realize in the following ways:
Fig. 3 shows the realization flow figure of the choosing method of the Drawing Object that the invention process three proposes, and details are as follows:
In step S301, obtain the user at the coordinate of the Drawing Object selected element of drawing area input, drawing area comprises at least one Drawing Object, and Drawing Object has unique digital number.
In step S302, get the color value of pixel correspondence in hidden area of coordinate, hidden area is identical with the drawing area size, the position is identical, coordinate system is identical, and comprise the Drawing Object corresponding with drawing area, each Drawing Object has different color values, and color value is corresponding with the digital number of drawing area Drawing Object.
See also the synoptic diagram that Fig. 4 a-4b shows drawing area and hidden area, wherein Fig. 4 a is the synoptic diagram of drawing area, wherein the ID value of Drawing Object 1 is 1, the ID value of Drawing Object 2 is 2, the ID value of Drawing Object 3 is 3, reaching Fig. 4 b is the synoptic diagram of hidden area, wherein the color value of the color value of the color value of Drawing Object 1=1, Drawing Object 2=2, Drawing Object 3=3.
In step S303, according to the corresponding relation of color value and digital number, determine the digital number of the Drawing Object chosen at drawing area.
In step S304, at drawing area, digital number graph of a correspondence object is the Drawing Object of choosing.
In embodiments of the present invention, the Drawing Object of drawing area is demarcated unique digital number, with the index of this digital number as Drawing Object, set up one and drawing area position, size, coordinate system is identical hidden area all, all objects of drawing area are plotted to this hidden area according to original coordinate, and the color value of drawing uses the digital number of object, when mouse moves to a certain position, read the pixel color of hidden area corresponding point, digital number corresponding relation according to object in the color value that obtains and the drawing area is chosen Drawing Object, by using digital number as the color value of Drawing Object, and choose the Drawing Object of unique digital number by color value, very simple and convenient.
For the ease of understanding, below with a concrete realization example embodiment of the invention is described, at this not in order to limit the present invention.
3.1, take C++bulder as example, use the TImage control to set up a drawing area A, called after ImgTop, and then set up a TBitmap object, as hidden area B, its size and coordinate arrange same ImgTop.:
Graphics::TBitmap?*bmap＝new?Graphics::TBitmap；
bmap-＞Width＝Form1-＞ImgTop-＞Width；
bmap-＞Height＝Form1-＞ImgTop-＞Height；
bmap-＞Top＝Form1-＞ImgTop-＞Top；
bmap-＞ImgTmp-＞Left＝Form1-＞ImgTop-＞Left；
After establishing hidden area B, empty hidden area B stand-by.
3.2, set up an array of depositing Drawing Object and use MyCav, store the curve of drafting with MyCav, specifically can be in the following ways:
MyCav[n when herein, at every turn drawing]. identification number is set to n,, the identification number of counting like this group number and Drawing Object is corresponding.
3.3, in drawing area A, draw a curve, from (x0, y0) to (x1, y1), be saved in MyCav[1 such as straight line] the position, as follows:
Form1-＞ImgTop-＞Canvas-＞MoveTo(x0，y0)；
Form1-＞ImgTop-＞Canvas-＞LineTo(x1，y1)；
This curve object is saved in the position of the sequence number 1 of MyCav array.
MyCav[1].id＝1；
MyCav[1].x0＝x0；
MyCav[1].y0＝y0；
MyCav[1].x1＝x1；
MyCav[1].y1＝y1；
3.4, the Drawing Object in drawing area A, set up, equally also in hidden area B, draw, and the paintbrush of curve plotting to establish wider, like this so that correspondence is picked up scope when choosing object.
bmap-＞Canvas-＞Pen-＞Width＝N
Coming the scope of picking up of corresponding setting with N, is 1 such as the live width of using at drawing area, can choose corresponding curve in 1 pixel and be illustrated in to differ during N=3.
Then be the same curve of drawing same coordinate at hidden area:
Bmap-＞Canvas-＞Pen-＞Color=1; The // 1st, for the digital number of curve object
bmap-＞Canvas-＞MoveTo(x0，y0)；
bmap-＞Canvas-＞LineTo(x1，y1)；
3.5, obtain mouse at the relative position of drawing area, mouse can trigger mobile when drawing area moves or clicks or click event, and is as follows:
void__fastcall?TForm1::ImgTopMouseDown(TObject*Sender，
TMouseButton?Button，TShiftState?Shift，int?X，int?Y)
void__fastcall?TForm1::ImgTopMouseMove(TObject*Sender，TShiftState?Shift，int?X，int?Y)
Parameter X and Y be exactly this moment mouse in the position of the relative drawing area of drawing area (0,0) point.
3.6, after obtaining the position (X, Y) of mouse, read the color value of this pixel value of hidden area:
n＝bmap-＞Canvas-＞Pixels[X][Y]；
If n in the scope of curve object, the curve of mouse indication be exactly sequence number be the curve object of n, namely MyCav[n] this object.
Embodiment four
Fig. 5 shows the structure of the selecting system of the Drawing Object that the invention process four proposes, for convenience of explanation, only show the part relevant with the embodiment of the invention, this device can be software unit, hardware cell or the soft or hard combining unit that is built in portable terminal.
In embodiments of the present invention, the selecting system of Drawing Object specifically comprises: coordinate acquiring unit 51, color value acquiring unit 52 and choose unit 53.
Coordinate acquiring unit 51 obtains the user at the coordinate of the Drawing Object selected point of drawing area input, and drawing area comprises at least one Drawing Object, and Drawing Object has unique identification number.
In embodiments of the present invention, identification number is the digital number of order.
Color value acquiring unit 52 obtains the color value of pixel correspondence in hidden area of coordinate, hidden area is identical with the drawing area size, the position is identical, coordinate system is identical, and comprise the Drawing Object corresponding with drawing area, each Drawing Object has different color values, and color value is corresponding with the identification number of drawing area Drawing Object.
Choose unit 53 according to the color value that color value acquiring unit 52 obtains, determine the Drawing Object of choosing at drawing area.
In embodiments of the present invention, choosing unit 53 specifically comprises identification number determination module 531 and chooses module 532, wherein, identification number determination module 531 is according to the color value that obtains and the corresponding relation of identification number, determines the identification number of the Drawing Object chosen at drawing area.At drawing area, the identification number graph of a correspondence object of choosing module 532 to choose identification number determination module 531 to determine is the Drawing Object of choosing.
In embodiments of the present invention, the color value of Drawing Object is corresponding with identification number in default color value scope; Then identification number determination module 531 is searched the affiliated default color value scope of color value of obtaining, and determines that the identification number corresponding with default color value scope is the identification number of choosing Drawing Object.
In embodiments of the present invention, when the Drawing Object selected point was the pixel of a plurality of Drawing Objects coincidences, color value acquiring unit 52 is chosen the pixel of last drafting at hidden area color value was the color value of selected point.
In sum the embodiment of the invention to have a mind to effect as follows:
1, by setting up size, position, coordinate system and the identical hidden area of the even drawing area of Drawing Object, and the different color value that has according to each Drawing Object of hidden area, and the corresponding relation of the identification number of this color value and drawing area Drawing Object, determined easily the Drawing Object that the user chooses at drawing area, need not the coordinate points that will obtain and each Drawing Object in the drawing area and calculate distance and comparison, simple, convenient.
2, set up corresponding relation by the even identification number of color value near the setting range color value that each Drawing Object is corresponding and the color value, no matter the color value that namely ought obtain is that the color value in the setting range all can be thought correspondingly with the identification number of this Drawing Object near color value corresponding to this Drawing Object or this color value, has avoided user's mouse to click outside Drawing Object and can't choose object.
3, by the Drawing Object of drawing area is demarcated unique digital number, with the index of this digital number as Drawing Object, set up one and drawing area position, size, coordinate system is identical hidden area all, all objects of drawing area are plotted to this hidden area according to original coordinate, and the color value of drawing uses the digital number of object, when mouse moves to a certain position, read the pixel color of hidden area corresponding point, digital number corresponding relation according to object in the color value that obtains and the drawing area is chosen Drawing Object, by using digital number as the color value of Drawing Object, and choose the Drawing Object of unique digital number by color value, very simple and convenient.
It should be noted that among the said system embodiment that included unit is just divided according to function logic, but is not limited to above-mentioned division, as long as can realize corresponding function; In addition, the concrete title of each functional unit also just for the ease of mutual differentiation, is not limited to protection scope of the present invention.
In addition, one of ordinary skill in the art will appreciate that all or part of step that realizes in the various embodiments described above method is to come the relevant hardware of instruction to finish by program, corresponding program can be stored in the computer read/write memory medium, described storage medium is such as ROM/RAM, disk or CD etc.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the choosing method of a Drawing Object is characterized in that, described method comprises the steps:
Obtain the user at the coordinate of the Drawing Object selected point of drawing area input, described drawing area comprises at least one Drawing Object, and described Drawing Object has unique identification number;
Obtain the color value of pixel correspondence in hidden area of described coordinate, described hidden area is identical with the drawing area size, the position is identical, coordinate system is identical, and comprise the Drawing Object corresponding with drawing area, described each Drawing Object has different color values, and described color value is corresponding with the identification number of drawing area Drawing Object;
According to the described color value that obtains, determine the Drawing Object of choosing at drawing area.
2. the method for claim 1 is characterized in that, and is described according to the described color value that obtains, and determines that the step of the Drawing Object chosen at drawing area specifically comprises:
According to the corresponding relation of the described color value that obtains and described identification number, determine the identification number of the Drawing Object chosen at drawing area;
At drawing area, choosing described identification number graph of a correspondence object is the Drawing Object of choosing.
3. method as claimed in claim 2 is characterized in that, the pass that the color value of described Drawing Object is corresponding with the identification number of drawing area Drawing Object is: the color value of described Drawing Object is corresponding with described identification number in default color value scope; Then
Described corresponding relation according to the described color value that obtains and described identification number, determine that the step of the identification number of the Drawing Object chosen at drawing area is specially:
Search the affiliated default color value scope of the described color value that obtains, determine that the identification number corresponding with described default color value scope is the described identification number of choosing Drawing Object.
4. the method for claim 1 is characterized in that, when described Drawing Object selected point be a plurality of Drawing Objects overlap pixel the time, the color value of then choosing the pixel of last drafting at hidden area is the color value of described selected point.
5. such as the described method of the arbitrary claim of claim 1 to 4, it is characterized in that, at drawing area, with the digital number of the Drawing Object identification number as Drawing Object, at hidden area, with the digital number value of the described Drawing Object color value as Drawing Object.
6. the selecting system of a Drawing Object is characterized in that, described system comprises:
The coordinate acquiring unit is used for obtaining the user at the coordinate of the Drawing Object selected point of drawing area input, and described drawing area comprises at least one Drawing Object, and described Drawing Object has unique identification number;
The color value acquiring unit, be used for obtaining the pixel of described coordinate at color value corresponding to hidden area, described hidden area is identical with the drawing area size, the position is identical, coordinate system is identical, and comprise the Drawing Object corresponding with drawing area, described each Drawing Object has different color values, and described color value is corresponding with the identification number of drawing area Drawing Object;
Choose the unit, for the color value that obtains according to described color value acquiring unit, determine the Drawing Object of choosing at drawing area.
7. system as claimed in claim 6 is characterized in that, the described unit 53 of choosing specifically comprises:
The identification number determination module is used for the corresponding relation according to the described color value that obtains and described identification number, determines the identification number of the Drawing Object chosen at drawing area;
Choose module, be used at drawing area, the identification number graph of a correspondence object of choosing described identification number determination module to determine is the Drawing Object of choosing.
8. system as claimed in claim 7 is characterized in that, the color value of described Drawing Object is corresponding with described identification number in default color value scope; Then
Described identification number determination module is used for searching the affiliated default color value scope of the described color value that obtains, and determines that the identification number corresponding with described default color value scope is the described identification number of choosing Drawing Object.
9. system as claimed in claim 6, it is characterized in that, described color value acquiring unit is used for when described Drawing Object selected point is the pixel of a plurality of Drawing Objects coincidences, and the color value of then choosing the pixel of last drafting at hidden area is the color value of described selected point.
10. such as the described system of the arbitrary claim of claim 6 to 10, it is characterized in that, at drawing area, with the digital number of the Drawing Object identification number as Drawing Object, at hidden area, with the digital number value of the described Drawing Object color value as Drawing Object.
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