Problem You need to make a snapshot of a widget.
Solution This code is based on advice given by Jeroen in a post to the FOX users' mailing list:
void makeSnapshot(const FXDrawable* drawable)
{
// Construct and create an FXImage object
FXPNGImage snapshot(getApp(), NULL, 0, drawable->getWidth(), drawable->getHeight());
snapshot.create();
// Create a window device context and lock it onto the image
FXDCWindow dc(&snapshot);
// Draw from the widget to this
dc.drawArea(drawable, 0, 0, drawable->getWidth(), drawable->getHeight(), 0, 0);
// Release lock
dc.end();
// Grab pixels from server side back to client side
snapshot.restore();
// Save recovered pixels to a file
FXFileStream stream;
if (stream.open("snapshot.png", FXStreamSave))
{
snapshot.savePixels(stream);
stream.close();
}
}
Contributor(s) Lyle Johnson
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