CN101387954B - Method for implementing stretchable writing electronic curtain - Google Patents
Method for implementing stretchable writing electronic curtain Download PDFInfo
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- CN101387954B CN101387954B CN2007101215369A CN200710121536A CN101387954B CN 101387954 B CN101387954 B CN 101387954B CN 2007101215369 A CN2007101215369 A CN 2007101215369A CN 200710121536 A CN200710121536 A CN 200710121536A CN 101387954 B CN101387954 B CN 101387954B
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Abstract
A method which realizes an electronic curtain screen capable of stretchable coating belongs to the technical field of electronic information. The steps of the method comprise creating a window body object, at least creating an area with the area not zero to display a handle in an optional position in the window body, and simultaneously at least creating a rectangular curtain screen corresponding to the handle, creating an area for window body display, placing the window body in the display area and drawing a window, when a mouse is moved in an optional area of the handle to click and drag, dynamically changing the position of the handle and the size of the area of the rectangular curtain screen according to the displacement of the current click of the mouse, simultaneously utilizing the rectangular curtain screen with changed area to create a new display area, and placing the window body in the new display area to draw a window again. After the function of the invention is started, users can choose whether to cover demonstration contents according to needs, when users need to use the curtain screen to cover a part or the total demonstration contents, users can stretch the curtain screen from a certain direction or a certain angle to cover the contents which is not needed to demonstrate by dragging an optional handle.
Description
Technical field
The invention belongs to electronic information technical field, relate to the INTERFACE DESIGN of computer application software, relate in particular to a kind of can be from the user interface of the stretched curtain in optional position in the screen window.
Background technology
In traditional office meeting and the teaching environment equipment, tool authority no more than office's blank and blackboard for education, and be considered to the office and the indispensable equipment of imparting knowledge to students always.Along with the development of infotech, the needs in market and the reduction of cost, electronic whiteboard begins to enter into office and classroom, and traditional blackboard and blank begin progressively to be replaced by electronic equipment.Electronic whiteboard is health and health not only, and makes clerical workforce and the activity of teacher in meeting and classroom have more inspiration and interactive.
Electronic whiteboard is a kind of new high-tech product that has compiled multiple high-tech means research and development such as most advanced and sophisticated electronic technology, software engineering, and it in conjunction with computing machine and projector, can realize with no paper office and teaching by using electromagnetic induction principle.Along with the popularization of electronic whiteboard technology, the application software that matches with it also grows up.At present, existing on the market electronic whiteboard software all can allow the user write on computer electronic documents and freely annotate and comment on by instruments such as hand-written writing on the blackboard pens, demonstrates and education activities by information-based equipment such as projector simultaneously; The user is at annotations and comments and when explaining orally, electronic whiteboard software also provides some subsidiary functions, strengthens explaining orally effect such as inserting resources such as picture, flash animation; Utilize functions such as magnifier, spotlight, the curtain content that gives top priority to what is the most important, thereby improve the effect that teachers and students exchange mutually.In these aids, " curtain " function is mainly used in the part viewing area of blocking screen." curtain " instrument of seeing on the market at present normally shelters from the displaying contents in the whole screen at the very start, and the user needs the size of manual adjustments and change " curtain " area, the displaying contents under just seeing in one deck window.For example, Canada SMART Board interactive electronic white board software is when enabling " curtain " function, be exactly directly to eject one full frame " curtain " to cover in whole demo content, the user need pass through the size of input equipment (mouse, handwriting pad etc.) manual adjustments " curtain " area, thereby adjust the size of its masked areas area, and the user can only write and smear in masked areas not, and the stretching mode of its interface and " curtain " as shown in Figure 1.
This shows that this " curtain " though instrument has played the effect of blocking demo content, function singleness is not easy operation.The user often only needs the shield portions demo content at the beginning, when especially needing demo content deduced and elaborate, often do not wish on presentation file, to delineate and write the project effect that too much " person's handwriting " influences demonstration document, this just needs the interface can also deduce the window area that also can remove at any time for user writing in the outer zone of floating supply when not influencing the file project effect.
Therefore, a kind of easy to operate, both can block demo content according to user's needs, the design and development that can be used as " curtain " instrument of writing application area again becomes urgent problem.
Summary of the invention
The purpose of this invention is to provide a kind of method that realizes the electronic curtain of stretchable writing.
For achieving the above object, take following method:
(1) creates a forms object;
(2) any position in forms is created a non-vanishing zone of area at least and is used to show handle, creates one and the corresponding rectangle curtain of handle simultaneously;
(3) create the zone that is used for the forms demonstration;
(4) forms are inserted in the above-mentioned viewing area and draw window;
(5) when mouse is clicked in arbitrary handle in window and is dragged; displacement according to current mouse point dynamically changes the position of handle and the area size of corresponding curtain rectangle thereof; the curtain that utilizes area to change is simultaneously created new viewing area; and forms are inserted in this zone repaint window; when user's mouse dragged in the zone beyond the handle in curtain, user handwriting can be drawn according to the mouse motion track by system.
The invention has the beneficial effects as follows, the electronic curtain that utilizes method provided by the present invention to develop, the user is after opening the curtain instrument, curtain does not hide demo content at once, the user is only when needs use " curtain " to hide part or all of demo content, click and also to pull arbitrary handle control in the window, can be from a certain direction or the stretched curtain of a certain angle in order to hide required content; In addition, stretched curtain can also be drawn out user handwriting with the mouse moving track.
Description of drawings
Fig. 1 is curtain interface and the drawing process of Canadian SMART Board;
Fig. 2 is the zone that utilizes the member function establishment different shape of CRgn class;
Fig. 3 asks friendship, cutting, union operation to two zones that existed;
Fig. 4 is static irregular forms visioning procedure figure;
Fig. 5 is that curtain pulled out condition of the present invention is enumerated figure;
Fig. 6 is the process flow diagram that the present invention stretches from screen four sides control curtain;
Fig. 7 is a left side of the present invention curtain drawing process process flow diagram;
Fig. 8 is the user interface screen shot of the present invention according to Fig. 6 and the described flow process exploitation of Fig. 7;
Fig. 9 is the present invention's screenshot capture of curtain stretching in actual applications;
Figure 10 be the present invention in actual application, the user draws the screenshot capture of user handwriting on the curtain that has stretched.
Embodiment
In the overwhelming majority's window application, the rectangle forms of the regular positive square that its forms all are to use, for example Chang Yong " notepad ", " clearance " or the like.The exploitation of rectangle forms has programming and realizes simply, the advantage that style is succinct, and it is enough so use in common document application program and simple trivial games.Just show slightly stiff but in some program, use,, will make program development more diversified if adopt irregular forms to substitute the rectangle forms.The Media Player 9.0 that typical example has windows to carry, the Media Player of redaction has the option of individual control panel, choose these panels, player just occurs with the panel-shaped of choosing, and player is at this moment wanted vivid and interesting than the ancient rectangular interfaces of the Media Player of former version.
All Windows forms all are arranged in a zone that is called " region ", if the size of forms exceeds the scope of " region ", windows can crop that part of forms that exceed " region " scope automatically, makes it invisible.So the establishment of irregular forms mainly is divided into following two steps:
The first step: create irregular " region ".
Second step: forms are put among " region " of establishment.
Second step only need be called a statement and can be realized in practical programs exploitation.For example: can call the api function SetWindowRgn of SDK in software development kit SDK program development, this function prototype is as follows:
int?SetWindowRgn(HWND?hWnd，HRGN?hRgn，BOOL?bRedraw)；
Annotate: wherein hWnd is a forms handle to be provided with, hRgn " region " handle for having created, and whether the bRedraw representative will redraw forms.
And in the MFC program development, can call the member function SetWindowRgn (HRGN hRgn, BOOL bRedraw) of the window class CWnd in the class libraries software development kit that Microsoft provides; Api function of the same name among the function of this function and parameter meaning and the SDK is identical.
With respect to second step, it is complicated many that the realization of the first step is wanted, and irregular forms are complicated more, and the process of creating its " region " is also complicated more.Below describe the notion and the establishment thereof in " region " zone in detail.The object of " region " in MFC is realized by the CRgn class." region " zone that the CRgn class provides following various initialization member functions to be used to create different shape comprises rectangle, ellipse, polygon etc., as shown in Figure 2.Its function prototype is as follows:
BOOL CreateRectRgnIndirect (LPCRECT lpRect); // establishment rectangle
BOOL CreateEllipticRgnIndirect (LPCRECT lpRect); // create oval
BOOL CreatePolyPolygonRgn (LPPOINT lpPoints, LPINT lpPolyCounts, intnCount, int nPolyFillMode); // establishment polygon
In actual exploitation of the present invention, using maximum is to utilize rectangular configuration or rectangular object to create the zone.
Meanwhile, the CRgn class of MFC also provides corresponding member function to allow the developer that cutting, union operation are carried out in any two zones of being created, so that create more complicated " region " zone of shape.This function prototype is as follows:
int?CombineRgn(CRgn*pRgn1，CRgn*pRgn2，int?nCombineMode)；
Preceding two parametric representations will be carried out two zones that existed of cutting, merging.The indicate action type of carrying out of the 3rd parameter nCombineMode, its concrete value and implication see table, and promptly the developer can carry out different operations to zone 1 and regional 2, as shown in Figure 3.
| nCombineMode | Implication | |
| RGN_AND | Can ask and operate |
|
| | Zone | 1 is copied to current region, ignores |
| RGN_DIFF | Can from |
|
| RGN_OR | Can ask and operate |
|
| RGN_XOR | Can carry out xor operation to |
In addition, almost each member function of CRgn class all has api function of the same name corresponding with it in SDK.As shown in Figure 4, the establishment of static irregular forms can reduce following concrete steps and realizes:
Step (1) is created a forms object.
Step (2) is created several region objects.
Step (3) is carried out cutting, is merged and to obtain a new region object the section object of having created as required.
Step (4) is put into new region object with the forms of creating, and obtains irregular forms.
The establishment of above-mentioned irregular forms is created under specified criteria, still belongs to static and creates, and can not adjust and change the shape of forms demonstration according to user's operation at any time, and this also is a problem whereabouts to be solved by this invention.
The present invention as shown in Figure 5, is divided into following two kinds of situations at the drawing process of curtain described in the specific implementation process:
Situation 1: any up and down layback is stretched curtain in the screen window, and this moment, the change of curtain was the change of single direction area size.
Situation 2: a certain point in the screen window, with arbitrarily angled stretching curtain, this moment, curtain can be from laterally, vertically both direction change simultaneously.
Now the concrete performance history of stretching curtain with situation 1 any up and down layback in the screen window is an example, realizes that with regard to its technology details is specifically described, and as shown in Figure 6, is divided into following steps:
Step (1) is at first created a forms object.
Step (2) in forms around any position, create 4 non-vanishing zones of area and be used for showing " handle ", present embodiment about the screen window frame, about respectively create the viewing area of the non-vanishing rectangular area of area everywhere as handle; Correspondingly, respectively create " curtain " that 1 rectangle is used to show its correspondence for above-mentioned 4 handles.
Step (3) is created the zone that is used to show forms, and above-mentioned 4 " handle " zones are asked also, obtains 1 new zone, this zone=handle area 1 ∪ handle area 2 ∪ ... ∪ handle area 4.
Step (4) is inserted the forms object of creating in above-mentioned " demonstration " zone and is drawn window.
Step (5) utilizes the window message response function to catch user's mouse point data point, if do not show " curtain " on the forms, when promptly the curtain area is zero, directly enters step (6); Otherwise, jump to step (7).
When step (6) is clicked in described any one " handle " zone of step (2) and is dragged when user's mouse, which " handle " what need judgement user mouse drag is, judge promptly which " handle " rectangular area it is in, because present embodiment respectively is provided with one " handle " at window border, the situation of " handle " that drags according to the user takes following four kinds of measures to handle:
First kind of situation, if mouse point is clicked in upside " handle " rectangular area and is dragged, catch and recording user mouse point, data according to mouse point length travel Δ y, calculate and the position of change back upside " handle " rectangle and the area of curtain, and, simultaneously forms are inserted in new " demonstration " zone and redraw forms with new " demonstration " zone of " curtain " rectangle establishment that area (enlarging/dwindle) changes.
Second kind of situation, if mouse point is clicked in downside " handle " rectangular area and is dragged, catch and recording user mouse point, data according to mouse length travel Δ y, calculate and the position of change back downside " handle " rectangle and the area of curtain, and, simultaneously forms are inserted in new " demonstration " zone and redraw forms with new " demonstration " zone of " curtain " rectangle establishment that area (enlarging/dwindle) changes.
The third situation, if mouse point is clicked in rectangular area, right side " handle " and is dragged, catch and recording user mouse point, data according to mouse transversal displacement Δ x, calculate and the position of right side " handle ", change back rectangle and the area of curtain, and, simultaneously forms are inserted in new " demonstration " zone and redraw forms with new " demonstration " zone of " curtain " rectangle establishment that area (enlarging/dwindle) changes.
The 4th kind of situation, if mouse point is clicked in rectangular area, left side " handle " and is dragged, catch and recording user mouse point, data according to mouse transversal displacement Δ x, calculate and the position of left side, change back " handle " rectangle and the area of curtain, and, simultaneously forms are inserted in new " demonstration " zone and redraw forms with new " demonstration " zone of " curtain " rectangle establishment that area (enlarging/dwindle) changes.
Show under the situation of " curtain " on step (7) forms that when user's mouse dragged, the user can continue stretch " curtain " in " curtain " corresponding " handle " rectangular area; When user's mouse dragged in " handle " zone in addition in " curtain ", user handwriting can be drawn according to the mouse motion track by system.
Except above-mentioned " zone " object, the present invention has also used the object of " point " and " rectangle " in implementation procedure.It is as follows now to make brief of the introduction:
In the present embodiment, the rectangle class represents that with CRect it has four member variable: top, left, bottom and right, represents the coordinate in the upper left corner and the lower right corner respectively.The point class represents that with CPoint its member variable is respectively: x and y, CPoint class formation as shown in Figure 6.Because the present invention can be about forms in specific implementation process, about 4 directions stretched " curtain ", existing drawing process with regard to left side " curtain " is specifically introduced, as shown in Figure 7, concrete steps are as follows:
When step (1) user's mouse is pressed in zone, left side " handle ", catch the data of mouse point point by window message response function OnLButtonDown (UINT nFlags, CPoint point), and be recorded as Pre_pt.
When step (2) continues to drag to the right when user's mouse, catch the data of current mouse point point by window message response function OnMouseMove (UINTnFlags, CPoint point), and be recorded as Cur_pt.
The difference Δ x=Pre_pt.x-Cur_pt.x of the horizontal ordinate after step (3) computing mouse moves if Δ x is non-vanishing, directly enters step (4); Otherwise return step (2).
Laterally change takes place because left side " curtain " in drawing process, is actually the right coordinate of " curtain " rectangle in step (4), therefore only needs to add Δ x with the right coordinate of left side " curtain ", can obtain new " curtain " rectangle; In addition, because in the process that mouse drags to the right, therefore left side " handle " also can calculate the reposition in left side " handle " according to Δ x equally along with mouse generation transversal displacement.
Step (5) is created " demonstration " zone of forms again according to new left side " curtain " rectangle.
Step (6) is inserted forms in above-mentioned " demonstration " zone, repaints forms.
When step (7) stops to move and lifts when user's mouse, stop to stretch " curtain "; Otherwise, jump to step (2).
In sum, the calculating of " Δ x " is the key point of cross directional stretch " curtain " in the step (3).By that analogy, the difference Δ y=Pre_pt.y-Cur_pt.y that the key of longitudinal stretching " curtain " is to calculate along slope coordinate omits concrete computation process herein.
The user interface screenshot capture of the present invention as shown in Figure 8 that adopts above-mentioned steps to develop, this user interface covers on the Powerpoint application window.Display text is the content on the Powerpoint lantern slide among the figure, four buttons on the window border are four " handles " being used to pull " curtain " that the present invention provides for the user, the figure illustrates under the original state, " curtain " be the user interface of stretched state not.
As shown in Figure 9, the user can be by pulling " handle ", from about, about four different directions stretched " curtain ".In the actual use, as shown in figure 10, the user can also write " person's handwriting " so that demo content is carried out refinement and analysis on " curtain " of drawn.
Claims (10)
1. method that realizes the electronic curtain of stretchable writing comprises:
(1) creates a forms object;
(2) any position in forms is created a non-vanishing zone of area at least and is used to show handle, creates one and the corresponding rectangle curtain of handle simultaneously at least;
(3) create the zone that is used for the forms demonstration;
(4) forms are inserted in the above-mentioned viewing area and draw window;
When (5) in mouse moves to arbitrary handle area, clicking and dragging; displacement according to current mouse point; dynamically change the position of handle and the area size of corresponding curtain rectangle thereof; the curtain rectangle that changes with area is created new viewing area simultaneously; and forms are inserted in the new viewing area repaint window; when user's mouse dragged in the zone beyond the handle in curtain, user handwriting can be drawn according to the mouse motion track by system.
2. method according to claim 1 is characterized in that, described mouse moves to click and drag in arbitrary handle area and comprises: a certain point in the screen window, laterally single direction drags.
3. method according to claim 1 is characterized in that, described mouse moves to click and drag in arbitrary handle area and comprises: a certain point in the screen window, vertically single direction drags.
4. method according to claim 1 is characterized in that, described mouse moves to click and drag in arbitrary handle area and comprises: a certain point in the screen window drags with arbitrarily angled.
5. method according to claim 1 is characterized in that, described displacement according to current mouse point dynamically changes the position of handle and the area size of corresponding curtain rectangle comprises:
Data Pre_pt when seizure mouse point is pressed;
Catch the data Cur_pt that mouse is put the current mouse point when mobile;
Computing mouse moves the poor of back and the coordinate of mouse when pressing.
6. method according to claim 1 is characterized in that, described displacement according to current mouse point dynamically changes the position of handle and the area size of corresponding curtain rectangle comprises:
Data Pre_pt when seizure mouse point is pressed;
The data Cur_pt of the current mouse point when seizure mouse point lifts;
Computing mouse lifts the poor of back and the coordinate of mouse when pressing.
7. according to claim 5 or 6 described methods, it is characterized in that, laterally drag handle, the difference Δ x that is calculated as the horizontal ordinate after mouse point moves of the difference of coordinate.
8. according to claim 5 or 6 described methods, it is characterized in that, vertically drag handle, the difference of coordinate is the difference Δ y of the along slope coordinate after mouse point moves.
9. according to claim 5 or 6 described methods, it is characterized in that with the arbitrarily angled handle that drags, the difference of coordinate comprises the difference Δ x and the Δ y of horizontal and vertical two coordinates after mouse point moves.
10. method according to claim 1 is characterized in that, described handle is four.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101630240B (en) * | 2009-08-18 | 2011-11-09 | 深圳雅图数字视频技术有限公司 | Electronic white board equipment and drawing method thereof |
| CN102053867B (en) * | 2009-10-28 | 2015-06-17 | 腾讯科技（深圳）有限公司 | Method and device for dynamically switching pictures |
| CN102135876B (en) * | 2010-01-21 | 2015-05-20 | 腾讯科技（深圳）有限公司 | Method and system for generating irregular skin |
| CN102955647B (en) * | 2011-08-22 | 2015-06-03 | 联想(北京)有限公司 | Display method and display device |
| KR101932718B1 (en) | 2012-02-24 | 2018-12-26 | 삼성전자주식회사 | Device and method for changing size of display window on screen |
| CN104317485B (en) * | 2014-10-29 | 2018-03-23 | 广州视睿电子科技有限公司 | electronic blackboard display control method and device |
| CN106126024A (en) * | 2016-06-23 | 2016-11-16 | 福建天泉教育科技有限公司 | A kind of method and system of display highlighting content |
| CN108205407B (en) * | 2016-12-20 | 2021-07-06 | 夏普株式会社 | Display device, display method, and storage medium |
| CN110688047A (en) * | 2018-07-06 | 2020-01-14 | 北京豆网科技有限公司 | User terminal and graphic user interface processing method |
| CN109388298A (en) * | 2018-08-23 | 2019-02-26 | 深圳点猫科技有限公司 | A kind of program window moving method and electronic equipment based on education operating system |
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| CN1949841A (en) * | 2005-10-12 | 2007-04-18 | 乐金电子（沈阳）有限公司 | Captions treater for image display and method thereof |
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| CN1581045A (en) * | 2003-08-11 | 2005-02-16 | 张玉红 | Infrared positioning mouse teacher's pointer |
| CN1949841A (en) * | 2005-10-12 | 2007-04-18 | 乐金电子（沈阳）有限公司 | Captions treater for image display and method thereof |
| WO2007068082A1 (en) * | 2005-11-14 | 2007-06-21 | Oz Communications Inc. | Context sensitive concealment of an input field |
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