我确实有一个奇怪的问题。我编写了一个dockview。
它基本上是一个内部有三个垂直子视图的NSView。所以我有一个左侧船坞,一个中间视图和一个右侧船坞。两个码头都可以折叠。折叠时,中间视图会调整大小。
我正在使用CoreAnimation
来设置折叠过程的动画。这几乎是正确的。
如果我解开左侧停靠点,则会调用右侧停靠drawRect
方法,尽管它不脏。
如果我停用animator
并直接设置新的帧大小,则在拆除时不会重绘右侧的停靠点,因此我假设帧的计算是正确的。
以下是折叠码头的代码:
- (void) mouseDown:(NSEvent *)event
{
// Exit method if already animating a dock
if(is_animating)
{
return;
}
NSPoint firstPoint = [self convertPoint:[event locationInWindow] fromView:nil];
unsigned long divider = [self mousePointInCollapseRect:firstPoint];
// If not clicked on a divider don't animate anything
if(divider == NSNotFound)
{
return;
}
NSView* main_view = [[self subviews] objectAtIndex:VIEW_MIDDLE];
NSView* collapse_view = [[self subviews] objectAtIndex:(divider == 0)? VIEW_LEFT : VIEW_RIGHT];
NSRect cframe = [collapse_view frame]; // New collapsable frame
NSRect mframe = [main_view frame]; // New main frame
if([self isSubviewCollapsed:collapse_view] == NO)
{
if(divider == 0)
{
cframe.size.width = 0.0;
mframe.origin.x -= (dock_width_left + DIVIDER_THICKNESS);
mframe.size.width += (dock_width_left + DIVIDER_THICKNESS);
}
else
{
mframe.size.width += (collapse_view.frame.size.width + DIVIDER_THICKNESS);
cframe.size.width = 0.0;
cframe.origin.x = mframe.origin.x + mframe.size.width;
}
// Turn off autoresizesSubviews on the collapsible subview
[collapse_view setAutoresizesSubviews:NO];
[NSAnimationContext beginGrouping];
[[NSAnimationContext currentContext] setDuration:(ANIMATION_DURATION)];
[[collapse_view animator] setFrame:cframe];
[[main_view animator] setFrame:mframe];
[NSAnimationContext endGrouping];
}
else
{
// Uncollapse dock
if(divider == 0)
{
// Left dock
cframe.size.width = dock_width_left;
mframe.origin.x = (COLLAPSEBAR_THICKNESS + dock_width_left + DIVIDER_THICKNESS);
mframe.size.width -= (dock_width_left + DIVIDER_THICKNESS);
}
else
{
// Right dock
mframe.size.width -= (dock_width_right + DIVIDER_THICKNESS);
cframe.size.width = dock_width_right;
cframe.origin.x = mframe.origin.x + mframe.size.width + DIVIDER_THICKNESS;
}
[NSAnimationContext beginGrouping];
[[NSAnimationContext currentContext] setDuration:ANIMATION_DURATION];
[[main_view animator] setFrame:mframe];
[[collapse_view animator] setFrame:cframe];
[NSAnimationContext endGrouping];
//Restore Autoresizing on subview
[self performSelector:@selector(restoreAutoResizingOfSubview:) withObject:collapse_view afterDelay:ANIMATION_DURATION + 0.05];
}
is_animating = YES;
[self performSelector:@selector(animationEnded) withObject:nil afterDelay:ANIMATION_DURATION + 0.05];
}
那么为什么要重新绘制非脏视图?