> OK, it seems no one has an answer. :-( > Has anyone ever implemented a magnifying lens mechanism on images > with behaviour more or less similar to my intentions? If yes, how was > that made?
The problem may be that pressing a mouse button on a window may "capture" the mouse and connect it to the window that you clicked into, ignoring any newly popped up windows until you release the moue button again. However, this depends very much on your window manager, something we have very little influence on from the FLTK side of the world. My suggested solution would be to customize the drawing function of the widget containing the image, and then - depending on some flag you would set in the handle() function - draw the magnifying class on top of the image, avoiding another window altogether. You can even go and create an image with a magnifying glass, antialiase edges and a drop shadow to give the impression of depth... . Plus, if the magnifier must overlap other parts of the window, you can draw it in the top-levels draw() function, but you must make sure to set damage flags correctly when the mouse moves. The only drawback is, that you magnifying glass can not leave the top-level window. Matthias ---- http://robowerk.com/ _______________________________________________ fltk mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk
