QT Mac TitleBar 处理

一、 QWidget 相关方法 setWindowFlags

1. 设置无边框、透明背景

    setWindowFlags(Qt::FramelessWindowHint | Qt::WindowSystemMenuHint);
    setAttribute(Qt::WA_TranslucentBackground, true);

2. QDialog 默认没有最小化按钮，且不能全屏

    setWindowFlags(windowFlags() & ~Qt::Dialog);
    setWindowFlags(windowFlags() | Qt::Window | Qt::WindowFullscreenButtonHint);

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默认TitleBar
QQ

在mac中 TitleBar 默认是独立在页面之外的，要想实现类似QQ这种内嵌到页面中的，需要使用Mac原生的API。暂时没有找到怎么用QT实现。

1. 通过QWidget获取Window

    NSView *view = (NSView *) widget->winId();
    NSWindow *window = [view window];

2. 设置TitleBar 透明

    window.titlebarAppearsTransparent = YES;

3. 隐藏标题

    window.titleVisibility = NSWindowTitleHidden;

4. 设置按钮融合进页面

// NSWindowStyleMaskFullSizeContentView 设置TitleBar不额外占用空间
    window.styleMask = NSWindowStyleMaskClosable | NSWindowStyleMaskMiniaturizable
                       | NSWindowStyleMaskResizable | NSWindowStyleMaskTitled
                       | NSWindowStyleMaskFullSizeContentView;

5. 设置window透明背景

    window.opaque = NO;
    window.backgroundColor = [NSColor clearColor];

6. 修改按钮禁用

NSButton *button = [window standardWindowButton:NSWindowZoomButton];
[button setEnabled:NO];

7. TitleBar默认高度很低，也无法修改。如果要像QQ一样将系统按钮移动位置，需要获取到系统按钮，加入到自己的页面上
   设置window 代理

window.delegate = [YSWindowDelegate defalut];

window 全屏化之后 按钮又会重新回到原始状态，所以需要在回调中 重新修改按钮的位置

- (void)windowWillExitFullScreen:(NSNotification *)notification {
    NSWindow *window = notification.object;
    NSButton *button1 = [window standardWindowButton:NSWindowZoomButton];
    button1.hidden = YES;
    NSButton *button2 = [window standardWindowButton:NSWindowCloseButton];
    button2.hidden = YES;

    NSButton *button3 = [window standardWindowButton:NSWindowMiniaturizeButton];
    button3.hidden = YES;

}

- (void)windowDidExitFullScreen:(NSNotification *)notification {
    NSLog(@"windowDidExitFullScreen --%@", notification);
    NSWindow *window = notification.object;
    NSButton *button = [window standardWindowButton:NSWindowZoomButton];
    button.hidden = NO;
    button.frame = NSMakeRect(button.frame.origin.x, 30, button.frame.size.width, button.frame.size.height);
    [self.view addSubview:button];
    
    
    NSButton *button1 = [window standardWindowButton:NSWindowCloseButton];
    button1.hidden = NO;
    button1.frame = NSMakeRect(button1.frame.origin.x, 30, button1.frame.size.width, button1.frame.size.height);
    [self.view addSubview:button1];

    
    NSButton *button2 = [window standardWindowButton:NSWindowMiniaturizeButton];
    button2.hidden = NO;
    button2.frame = NSMakeRect(button2.frame.origin.x, 30, button2.frame.size.width, button2.frame.size.height);
    [self.view addSubview:button2];

}

8. 默认情况TitleBar 只有22的高度，通过以下方法可以调整TitleBar的高度，这个时候就可以调整系统按钮的坐标，也可以在titlebar上面添加视图

        NSTitlebarAccessoryViewController *vc = [[NSTitlebarAccessoryViewController alloc] init];
        vc.view = [[NSView alloc] initWithFrame:((NSView *)window.contentView).frame];
        [window addTitlebarAccessoryViewController:vc];

        NSButton *button = [window standardWindowButton:NSWindowZoomButton];
        NSRect rect = button.frame;
        rect.origin.y -= 30;
        button.frame = rect;