Hi

 Anyone who can explain me how to draw gridlines over an image show in a WorkspaceViewer? The lines must have a width of 1px, independent of the zoom value of the viewer and the lines must be snapped to the pixels of the image.

Thanks in advance

Frans

Hello Frans,

 To add lines to your image you should use our canvas class's DrawLine function. Simply store a copy of your original AtalaImage and add lines whenever the zoom level changes.

AtalaImage origin = new AtalaImage("MyTiff.tif");

AddLineToViewer(origin,myViewer, 10);

public AddLineToViewer(AtalaImage origin, ImageViewer viewer, int x)

{

 viewer.Image = origin.Clone();

Canvas c = new Canvas(viewer.Image);

c.DrawLine(new Point(x,0) ,new Point(x,viewer.Image.Height));

}

Then whenever you want to redraw the line simply recall AddLineToViewer to add one line to the viewer.

Let me know if this helps.

~Kevin