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#1 Posted : Wednesday, January 19, 2011 4:47:07 AM(UTC)
username77

Groups: Registered
Posts: 36

Thanks: 4 times

Hello

Im using WindowsFormApp in vb.net , LT v17

It's possible to move (navigate) on image by using the arrow keys (or combined ctrl + arrow Up/Down/Left/Right) in RasterimageViewer?

Best Regards
AN
 

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#2 Posted : Wednesday, January 19, 2011 5:28:22 AM(UTC)
Maen Hasan

Groups: Registered, Tech Support
Posts: 1,328

Was thanked: 1 time(s) in 1 post(s)

Yes, you can move the image on the rasterImageViewer control by changing the rasterImageViewer1.ScrollPosition property value.
You need to change the rasterImageViewer1.ScrollPosition property value inside the rasterImageViewer.KeyUp event.
The code will be something as follows:
+----------+
private void Form1_Load(object sender, EventArgs e)
{
RasterCodecs codecs = new RasterCodecs();
rasterImageViewer1.Image = codecs.Load(@"C:\DelMe\OCR1.TIF");
rasterImageViewer1.KeyUp += new KeyEventHandler(rasterImageViewer1_KeyUp);
}

void rasterImageViewer1_KeyUp(object sender, KeyEventArgs e)
{
switch (e.KeyCode)
{
case Keys.Up:                    
rasterImageViewer1.ScrollPosition = new Point(rasterImageViewer1.ScrollPosition.X, rasterImageViewer1.ScrollPosition.Y - 10);                    
break;
case Keys.Down:
rasterImageViewer1.ScrollPosition = new Point(rasterImageViewer1.ScrollPosition.X, rasterImageViewer1.ScrollPosition.Y + 10);
break;
case Keys.Left:
rasterImageViewer1.ScrollPosition = new Point(rasterImageViewer1.ScrollPosition.X - 10, rasterImageViewer1.ScrollPosition.Y);
break;
case Keys.Right:
rasterImageViewer1.ScrollPosition = new Point(rasterImageViewer1.ScrollPosition.X + 10, rasterImageViewer1.ScrollPosition.Y);
break;
}

rasterImageViewer1.Refresh();
}
+----------+

Thanks,
Maen Badwan
LEADTOOLS Technical Support
 
#3 Posted : Wednesday, January 19, 2011 6:55:49 AM(UTC)
username77

Groups: Registered
Posts: 36

Thanks: 4 times

Wonderful !

Thanks Maen.
 
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