Just one delegate method seems to do it for me, but I wrote this quick so I
might be overlooking something:
- (void)splitView:(NSSplitView *)sender
resizeSubviewsWithOldSize:(NSSize)oldSize
{
float desiredTopViewHeight = [_topView frame].size.height;
[sender adjustSubviews];
NSRect frameOne = [_topView frame];
NSRect frameTwo = [_bottomView frame];
frameOne.size.height = desiredTopViewHeight;
frameTwo.size.height = [sender frame].size.height -
desiredTopViewHeight - [sender dividerThickness];
[_topView setFrame:frameOne];
[_bottomView setFrame:frameTwo];
}
--Andy
On Tuesday, September 15, 2009, at 10:01AM, "Graham Cox"
<graham....@bigpond.com> wrote:
>Ok, I'm beating my head on this one, wasting time I have better things
>to spend it on. NSSplitView is a travesty, but we're stuck with it, so
>I need to know the magic incantation of delegate methods and other
>voodoo needed to implement the following for a split view with one
>upper and one lower pane.
>
>1. When I drag the splitter directly, it moves allowing me to position
>it where I want within the constrained min and max of the contained
>views.
>2. When the window resizes I want the split to stay exactly where it
>is relative to the top of the window. I do not want it to move
>proportionally which seems to be the default. In other words the
>window resize affects the bottom pane only, even though the top one
>can be resized by the split. Whoever decided that was a sensible
>behaviour for the default anyway?
>3. When the window is resized programatically as well as drag-resized,
>2. needs to be true also.
>
>This seems so simple and obvious that I'm finding it very frustrating
>that nothing I have tried works.
>
>What I have tried:
>
>- (BOOL)splitView:(NSSplitView *)splitView shouldAdjustSizeOfSubview:
>(NSView *)subview
>
>I've tried returning NO for the times when the window is being
>resized, assuming that this would effectively lock the split in place.
>It's not even called except once when the view is instantiated. I'm
>guessing then that this is meant to indicate the general disposition
>of view splitting, called just once for all time. The docs are unclear
>on this to say the least.
>
>- (CGFloat)splitView:(NSSplitView *)splitView constrainSplitPosition:
>(CGFloat)proposedPosition ofSubviewAt:(NSInteger)dividerIndex
>
>This is at only called during manual dragging, so can't be used to
>constrain the split during window resize, as even though the split is
>being moved at that time, this isn't checked. In any case there's no
>way to obtain the current split position at the start of the window
>resize so I can return it to effect a "lock".
>
>- (void)splitViewWillResizeSubviews:(NSNotification *)aNotification
>
>This is called in both cases - dragging the split and resizing the
>window. But what can I do with it? Since there's no way to get the
>split position at the start of a resize I can't set it from here or
>anywhere else.
>
>Any ideas what I can do?
>
>
>--Graham
>
>
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