source: branches/4.5.1/src/gui/kernel/qcocoapanel_mac.mm

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#import <private/qcocoapanel_mac_p.h>
#ifdef QT_MAC_USE_COCOA
#import <private/qt_cocoa_helpers_mac_p.h>
#import <private/qcocoawindow_mac_p.h>
#import <private/qcocoawindowdelegate_mac_p.h>
#import <private/qcocoaview_mac_p.h>
#import <private/qcocoawindowcustomthemeframe_mac_p.h>

#include <QtGui/QWidget>

QT_FORWARD_DECLARE_CLASS(QWidget);
QT_BEGIN_NAMESPACE
extern Qt::MouseButton cocoaButton2QtButton(NSInteger buttonNum); // qcocoaview.mm
QT_END_NAMESPACE
QT_USE_NAMESPACE

@implementation QT_MANGLE_NAMESPACE(QCocoaPanel)

- (BOOL)canBecomeKeyWindow
{
    QWidget *widget = [self QT_MANGLE_NAMESPACE(qt_qwidget)];

    bool isToolTip = (widget->windowType() == Qt::ToolTip);
    bool isPopup = (widget->windowType() == Qt::Popup);
    return !(isPopup || isToolTip);
}

/***********************************************************************
  BEGIN Copy and Paste between QCocoaWindow and QCocoaPanel
  This is a bit unfortunate, but thanks to the dynamic dispatch we
  have to duplicate this code or resort to really silly forwarding methods
**************************************************************************/

/*
    The methods keyDown, keyUp, and flagsChanged... These really shouldn't ever
    get hit. We automatically say we can be first responder if we are a window.
    So, the handling should get handled by the view. This is here more as a
    last resort (i.e., this is code that can potentially be removed).
 */

- (void)keyDown:(NSEvent *)theEvent
{
    bool keyOK = qt_dispatchKeyEvent(theEvent, [self QT_MANGLE_NAMESPACE(qt_qwidget)]);
    if (!keyOK)
        [super keyDown:theEvent];
}

- (void)keyUp:(NSEvent *)theEvent
{
    bool keyOK = qt_dispatchKeyEvent(theEvent, [self QT_MANGLE_NAMESPACE(qt_qwidget)]);
    if (!keyOK)
        [super keyUp:theEvent];
}

- (void)flagsChanged:(NSEvent *)theEvent
{
    qt_dispatchModifiersChanged(theEvent, [self QT_MANGLE_NAMESPACE(qt_qwidget)]);
    [super flagsChanged:theEvent];
}


- (void)tabletProximity:(NSEvent *)tabletEvent
{
    qt_dispatchTabletProximityEvent(tabletEvent);
}

- (void)sendEvent:(NSEvent *)event
{
    [self retain];

    QWidget *widget = [[QT_MANGLE_NAMESPACE(QCocoaWindowDelegate) sharedDelegate] qt_qwidgetForWindow:self];
    QT_MANGLE_NAMESPACE(QCocoaView) *view = static_cast<QT_MANGLE_NAMESPACE(QCocoaView) *>(qt_mac_nativeview_for(widget));
    Qt::MouseButton mouseButton = cocoaButton2QtButton([event buttonNumber]);

    // sometimes need to redirect mouse events to the popup.
    QWidget *popup = qAppInstance()->activePopupWidget();
    if (popup && popup != widget) {
        switch([event type])
        {
        case NSLeftMouseDown:
            qt_mac_handleMouseEvent(view, event, QEvent::MouseButtonPress, mouseButton);
            // Don't call super here. This prevents us from getting the mouseUp event,
            // which we need to send even if the mouseDown event was not accepted.
            // (this is standard Qt behavior.)
            break;
        case NSRightMouseDown:
        case NSOtherMouseDown:
            if (!qt_mac_handleMouseEvent(view, event, QEvent::MouseButtonPress, mouseButton))
                [super sendEvent:event];
            break;
        case NSLeftMouseUp:
        case NSRightMouseUp:
        case NSOtherMouseUp:
            if (!qt_mac_handleMouseEvent(view, event, QEvent::MouseButtonRelease, mouseButton))
                [super sendEvent:event];
            break;
        case NSMouseMoved:
            qt_mac_handleMouseEvent(view, event, QEvent::MouseMove, Qt::NoButton);
            break;
        case NSLeftMouseDragged:
        case NSRightMouseDragged:
        case NSOtherMouseDragged:
            [QT_MANGLE_NAMESPACE(QCocoaView) currentMouseEvent]->view = view;
            [QT_MANGLE_NAMESPACE(QCocoaView) currentMouseEvent]->theEvent = event;
            if (!qt_mac_handleMouseEvent(view, event, QEvent::MouseMove, mouseButton))
                [super sendEvent:event];
            break;
        default:
            [super sendEvent:event];
            break;
        }
    } else {
        [super sendEvent:event];
    }
    qt_mac_dispatchNCMouseMessage(self, event, [self QT_MANGLE_NAMESPACE(qt_qwidget)], leftButtonIsRightButton);


    [self release];
}

- (BOOL)makeFirstResponder:(NSResponder *)responder
{
    // For some reason Cocoa wants to flip the first responder
    // when Qt doesn't want to, sorry, but "No" :-)
    if (responder == nil && qApp->focusWidget())
        return NO;
    return [super makeFirstResponder:responder];
}

/***********************************************************************
  END Copy and Paste between QCocoaWindow and QCocoaPanel
***********************************************************************/
+ (Class)frameViewClassForStyleMask:(NSUInteger)styleMask
{
    if (styleMask & QtMacCustomizeWindow)
        return [QT_MANGLE_NAMESPACE(QCocoaWindowCustomThemeFrame) class];
    return [super frameViewClassForStyleMask:styleMask];
}

@end
#endif