Hi,
I've taken the Audio Unit (AU) code for carbon overlay windows over a
cocoa view and modified it for my purposes as a proof of concept test.
I needed to make some changes to improve the AU code in my case (the
left edge of the cocoa view can move because it is on the right side
of a split view).
I have managed to remove the problems associated with the code except
for one which is some tearing during redrawing in the carbon window
when the cocoa window is being grown vertically and horizontally
rapidly. Does anyone have some ideas as to how to remove the tearing.
I've included the relevant bits of the proof of concept code below
which is part of a class overriding a NSView.
There is one odd thing about the code, and that is I load a carbon
window with the defined views from a nib file, I then create the
overlay window, insert the views into the created overlay window, then
dispose of the nib window, and then add the overlay window into the
cocoa window group.
Thanks
Kevin
//
-----------------------------------------------------------------------------
// fitCarbonWindowToCocoaView
//
-----------------------------------------------------------------------------
- (void)fitCarbonWindowToCocoaView
{
NSRect cocoaViewFrame = [self frame];
HIRect windowRect, cocoaWindowRect;
// windowRect.size.width = cocoaViewFrame.size.width+0.5;
// windowRect.size.height = cocoaViewFrame.size.height+0.5;
windowRect.size.width = cocoaViewFrame.size.width;
windowRect.size.height = cocoaViewFrame.size.height;
NSPoint position = [[[self window] contentView] convertPoint:[self
frame].origin
fromView:self];
HIWindowGetBounds((WindowRef)[[self window] windowRef],
kWindowContentRgn,
kHICoordSpaceScreenPixel,
&cocoaWindowRect);
windowRect.origin.x = cocoaWindowRect.origin.x + position.x / 2;
windowRect.origin.y = (cocoaWindowRect.origin.y +
cocoaWindowRect.size.height)
- (position.y +
cocoaViewFrame.size.height);
HIWindowSetBounds(carbonWindow, kWindowContentRgn,
kHICoordSpaceScreenPixel,
&windowRect);
}
//
-----------------------------------------------------------------------------
// setFrame
//
-----------------------------------------------------------------------------
- (void)setFrame:(NSRect)theFrame
{
[super setFrame:theFrame];
[self fitCarbonWindowToCocoaView];
}
//
-----------------------------------------------------------------------------
// createCarbonOverlayWindow
//
-----------------------------------------------------------------------------
- (void)createCarbonOverlayWindow
{
HIViewRef carbonWindowRootControl;
HIViewRef tmpWindowRootControl;
HIViewRef viewToSwitchWindow;
OSStatus result1, result2;
WindowRef tempWindow = MyCreateWindow();
Rect bounds = {0,0,373,480};
if (!tempWindow)
{
NSLog(@"createCarbonOverlayWindow: Could not load carbon window from
nib.");
return;
}
HideWindow(tempWindow);
result1 = CreateNewWindow(kOverlayWindowClass,
kWindowStandardHandlerAttribute | kWindowCompositingAttribute |
kWindowOpaqueForEventsAttribute, &bounds, &carbonWindow);
SetThemeWindowBackground(carbonWindow, kThemeTextColorWhite, YES);
SetWindowActivationScope(carbonWindow,
kWindowActivationScopeIndependent);
if (result1)
{
NSLog(@"createCarbonOverlayWindow: window creation failed result1=
%d, result2=%d", result1, result2);
return;
}
result1 = GetRootControl(carbonWindow, &carbonWindowRootControl);
result2 = GetRootControl(tempWindow, &tmpWindowRootControl);
if (result1 || result2)
NSLog(@"createCarbonOverlayWindow: Error getting root control
result1=%d, result2=%d", result1, result2);
viewToSwitchWindow = HIViewGetFirstSubview(tmpWindowRootControl);
if (!viewToSwitchWindow)
{
NSLog(@"Failure to get subview");
return;
}
result1 = HIViewAddSubview(carbonWindowRootControl,
viewToSwitchWindow);
if (result1)
{
NSLog(@"createCarbonOverlayWindow: failed to add the hiview");
return;
}
// PrintToConsoleCarbonHIViewTree(carbonWindowRootControl, 0);
[self fitCarbonWindowToCocoaView];
NSWindow *cocoaWindow = [self window];
WindowRef cocoaWindowRef = (WindowRef)[cocoaWindow windowRef];
NSWindow *mixedWindow = [[NSWindow alloc]
initWithWindowRef:carbonWindow];
WindowGroupRef group;
CreateWindowGroup(0, &group);
SetWindowGroupParent(group, GetWindowGroup(cocoaWindowRef));
ChangeWindowGroupAttributes(group, kWindowGroupAttrLayerTogether |
kWindowGroupAttrSharedActivation |
kWindowGroupAttrHideOnCollapse, 0);
SetWindowGroup(cocoaWindowRef, group);
SetWindowGroup(carbonWindow, group);
[cocoaWindow addChildWindow:mixedWindow ordered:NSWindowAbove];
DisposeWindow(tempWindow);
ShowWindow(carbonWindow);
}
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