How do you smoothly pop open a left side section on a form?
Posted on 2007-11-14
I am developing a wizard for a program I am working on. I just got to the point of incorporating a tree view on the left side of the wizard so the user can more easily move around the wizard (there will be instances when the wizard has over 100 panels). I want the tree view to be hidden at first and come up only when the user clicks on a splitter (code responding to a button press would work too, don't concentrate on using a splitter). The arrangement of the form is the tree view on the left with a splitter left aligned to it, a panel on the right that contains a top panel (the parent for the wizard panels) and a bottom panel for the usual wizard navigation buttons.
The issue I am working on is this... when the form needs to display or hide the tree on the left I will need to resize and move the form so the panel appears to pop up on the left of the form (everything else stays in place). I already have this working. The issue I need to resolve is how to keep the controls in the non-tree view portion of the form from flickering while the tree view is hidden and shown (thus changing the left side and width of the form by 161. I have tried the LockWindowUpdate. I have tried the DisableAlign and EnableAlign at the form level. I even tried to temporarily stop window message processing by hooking the MessageProc.
What I am looking for is a simple example. If you can get the example to work with:
1) a tree view left aligned and a parent panel client aligned
2) some buttons in the right bottom panel (bottom aligned within the parent panel)
3) some controls in the right top panel (client aligned within the right side parent panel)
and show me the code that can pop it open or closed on the left side, smoothly, the points are yours.