My own listbox
My own listbox
- Subject: My own listbox
- From: "Vitaly Ovchinnikov" <email@hidden>
- Date: Sat, 2 Aug 2008 12:21:02 +0400
Hello,
In windows there is a control called "Listbox". It looks like grid
with single column without header. Several rows and maybe a scrollbar.
Example is here:
http://www.java2s.com/Tutorial/VBImages/ListBoxSelectionEventAddValue.PNG
I need to create control that works similar way. It will not be
actually a listbox, but it will work the same way: few objects - rows
and an optional scrollbar. As a "good" cocoa programmer I derived
NSControl and implemented -drawRect to draw my own rows. Then I put
this control to the window in Interface Builder and embed it into
NSScrollView. Here the problem starts. How can I tell NSScrollView
what size does my control have? I tried to implement -bounds and
-frame methods, but scroller became crazy. I tried this code:
- (NSRect) frame
{
NSRect rc = [super frame];
rc.size.height = number_of_rows * height_of_row;
return rc;
}
- (NSRect) bounds {.. the same..}
NSScrollView shows scrollbar with correct proportions, but then I drag
it - it scrolls my control to the wrong direction. I tried to play
with -isFlipped - no success.
So I need some similar source to take a look for what I missed. Does
anybody have one?
Thank you.
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