Re: Resizing (Zoom In/Out) images using RasterImageList

Hi.
I'm trying to resize all images in the RasterImageList (Zoom In/Zoom Out) using a VB.Net 2008 TrackBar control . I'm trying to simulate the iPhoto/iTunes (Mac OSX) softwares' behaviour after dragging a trackbar control (Zoom In - Left to Right / Zoom Out - Right to Left).

After resizing (Zoom In), all images show a poor quality . How to resize all of the images, preserving their original quality ?

Thanks.
Alexandre.

Visual Studio VB.NET 2008
LEADTOOLS Raster Imaging Pro for .Net EVAL 15

Alexandre,
How exactly are you resizing the images? What is the method that you are using to zoom in/out images?

Hi Adam.
I resolve the problem using the object RasterPaintProperties. Like this code below:

Dim RasterPaint As New RasterPaintProperties

RasterPaint.PaintDisplayMode = RasterPaintDisplayModeFlags.Bicubic
RasterPaint.PaintEngine = RasterPaintEngine.GdiPlus2
RasterPaint.UsePaintPalette = True
imageList.PaintProperties = RasterPaint

Now I'm trying to resize all the images using something like the property ScaleFactor used by RasterImageViewer.
But in a RasterImageList does't exist this property. The properties ItemSpacingSize, ItemImageSize, ItemSize accept only
the SIZE type. The idea will be manipulate these properties using somethin like ScaleFactor.

Thanks.
Alexandre

Alexandre,
The item size can only be passed as a 'Size' structure. So you will have to calculate the new item size based on the desired scale factor and pass the new size structure to the RasterImageList Class.

Ok Adam.
I understood what you said but when I change the size (with the new scale factor)
and pass the new size structure to the RasterImageList, nothing happens.
What I have to do to "force" a "Refresh" to show it in that new size?

Thanks.
Alexandre

Hi Adam.
I solved the problem. Thank you for your help.
Happy New Year!

Alexandre.