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Improved Image Control
Message
 
À
04/12/2007 10:58:21
Information générale
Forum:
Visual FoxPro
Catégorie:
Classes - VCX
Versions des environnements
Visual FoxPro:
VFP 9 SP2
Divers
Thread ID:
01273066
Message ID:
01273068
Vues:
23
Cesar,
System.PRG is missing in the ZIP.
Where I could found it?

>I've been working on the improvement of the image control, basically in order to fix the PictureVal bugs, and to add some cool and new functions.
>
>At the link below you can download one of the first versions of a prototype
>It's very primitive yet, but it can show you what I want to achieve.
>
>http://weblogs.foxite.com/files/cesarchalom/imagex/ImageX.zip
>
>
>Below is the todo list, showing what has been done till now.
>
>List of the improvements or fixes added:
>
>- Rotate and Flip
>- AngleRotation
>- Make BackGround Transparent
>- Select the color to become transparent - Default is the color from pixel (0,0)
>- Reliable PICTUREVAL
>- Allow aplying GDI+ directly, using some techniques from the ImageCanvas, like "oGfx" and "oBmp"
>- Resize (Partial, see the Zoom property)
>- Mouse Events
>- Zoom
>
>- SaveAs
>&& This.oBmp.Save("c:Image.PNG", .Imaging.ImageFormat.Png)
>- Print
>&& This.oBmp.ToPrinter()
>
>
>To do List:
>
>- Effects (Negative, GreyScale, Brightness, etc)
>- Smoothing Mode
>- Interpolation Mode
>- Enable the "BeforeDraw" method
>- Change Color Depth
>- Region select
>- Copy/Paste (selection) into another Image control
>- Copy (selection) to clipboard for use in other applications
>- Compatibility with VFP Report Engine
>- Alternative text for the case the image could not be loaded, or empty()
>- Add reliable OBJTOCLIENT() function to allow objects to be inside PageFrames.
>- Control the Visible event (now it is always visible)
>
>
>I'm based in Craig Boyd's article published in FoxTalk some years ago.
>It contains a VCX that is only a place holder, and contains the methods and properties that i need.
>In the SCX, you'll find all the codes responsible for the image rendering.
>
>Please run the file TESTIMAGEX2.scx, to understand what I made so far.
>
>There are really few people that have tried this before, and I trust very much in your opinions regarding this.
>
>The main issue problem is the flickering when the form is resized.
>
>For this class, I didn't use the API BeginPaint. All I did was to call "Thisform.Draw" to make VFP redraw its controls.
>
>During resize, to avoid the flickering, I thought of UNBINDING the WM_PAINT Windows event, and then call BeginPaint and then Thisform.Draw(), and after this is finished, Bind the WM_PAINT event again...
>
>But in my first insight this did not work.
>
>Do you have any suggestions regarding this ?
>
>This version uses a VFP Container as placeHolder.
>For the future, I want to use the original Image Object. If the Picture property is not empty, then it will behave as it should by default.
>Then, BINDEVENT the PictureVal property, and for the case it receives a value, then my control would manage the images.
>
>
>Thanks in advance for any suggestions or feedback !
Against Stupidity the Gods themselves Contend in Vain - Johann Christoph Friedrich von Schiller
The only thing normal about database guys is their tables.
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