My program's view is based on the CZoomView by Brad Pirtle(codeguru.com Doc-View catagory), which is derieved from CSrollView.
I used the SelectStockObject(BLACK_PEN) to do most of my drawing, so when I zoom in and out the lines stay a the same thickness(1 pixel), this works great.
The problem is when certain items are selected they are redrawn using a brush similar to the PS_ALTERNATE pen in NT (Drawing dotted lines - Jean-Edouard Lachand-Robert/GDI catagory). This works great when you stay in the default zoom mode, but when you zoom in/out the lines really look bad. Sometimes some lines are thicker than others.
What I would like to do is keep them(the dotted lines) at the same 1 pixel width regaurdless of how far in/out you zoom.
I also implement the DrawDragRect, which as you might guessed works great in the default mode. When I zoom in/out things get crazy, it does not redraw it's self correctly. I've testet the CRectTracker which uses the DrawDragRect and it works fine at any zoom. When I call the DrawDragRect I pass it a CSize(1,1) like CRectTracker.
Can anybody help? I'm really stuck :(