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Implemented apple API extension allowing delegate to constrain divider

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position to certain positions while dragging


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@8850 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
nico 2001-01-28 17:43:13 +00:00
parent e87db4cf8f
commit 0526fde72e
1 changed files with 29 additions and 0 deletions
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29
Source/NSSplitView.m
View file

@ -81,6 +81,9 @@
float divVertical, divHorizontal; float divVertical, divHorizontal;
NSDate *farAway = [NSDate distantFuture]; NSDate *farAway = [NSDate distantFuture];
unsigned int eventMask = NSLeftMouseUpMask | NSLeftMouseDraggedMask; unsigned int eventMask = NSLeftMouseUpMask | NSLeftMouseDraggedMask;
/* YES if delegate implements splitView:constrainSplitPosition:ofSubviewAt:*/
BOOL delegateConstrains = NO;
/* if there are less the two subviews, there is nothing to do */ /* if there are less the two subviews, there is nothing to do */
if (count < 2) if (count < 2)
@ -164,6 +167,18 @@
prev = v; prev = v;
} }
} }
/* Check if the delegate wants to constrain the spliview divider to
certain positions */
if (_delegate
&& [_delegate
respondsToSelector:
@selector(splitView:constrainSplitPosition:ofSubviewAt:)])
{
delegateConstrains = YES;
}
if (_isVertical == NO) if (_isVertical == NO)
{ {
divVertical = _dividerWidth; divVertical = _dividerWidth;
@ -239,6 +254,20 @@
while ([e type] != NSLeftMouseUp) while ([e type] != NSLeftMouseUp)
{ {
p = [self convertPoint: [e locationInWindow] fromView: nil]; p = [self convertPoint: [e locationInWindow] fromView: nil];
if (delegateConstrains)
{
if (_isVertical)
{
p.x = [_delegate splitView: self constrainSplitPosition: p.x
ofSubviewAt: offset];
}
else
{
p.y = [_delegate splitView: self constrainSplitPosition: p.y
ofSubviewAt: offset];
}
}
if (_isVertical == NO) if (_isVertical == NO)
{ {
if (p.y < minCoord) if (p.y < minCoord)