如何在C#MonoMac中捕获鼠标事件

时间:2015-05-20 10:22:18

标签: c# xamarin mono nswindow monomac

首先,我的目标是务实创建(没有控制器或类似的东西,只有单一类)无边界的NSWindow。在这个窗口中,我想跟踪鼠标事件,例如:鼠标按下,鼠标移动。就这么简单。

我需要在Monomac项目中使用Xamarin Studio在C#中执行此操作。我的窗口非常简单

public class MyWindow : NSWindow
{
    public MyWindow()
        :base(new RectangleF (0, 0, 100, 100), 
            NSWindowStyle.Closable | NSWindowStyle.Resizable | NSWindowStyle.Titled, NSBackingStore.Buffered, 
            false)
    {
        this.StyleMask = NSWindowStyle.Borderless;
        this.MakeKeyAndOrderFront( null );
    }
}

现在,据我所知,我应该将NSView添加到具有声明事件的NSWindow类中。所以我创建了NSView类:

public class MouseTracking : NSView
{
    public NSTrackingArea tracking;

    public override bool AcceptsFirstResponder ()
    {
        return true;
    }

    public override void DrawRect(RectangleF dirtyRect)
    {
        base.DrawRect(dirtyRect);
        var context = NSGraphicsContext.CurrentContext.GraphicsPort;
        var rectangle = new RectangleF (0,0, this.Frame.Width, this.Frame.Height);
        NSColor.Blue.Set ();
        context.FillRect (rectangle);
    }

    public override void UpdateTrackingAreas()
    {
        if (tracking != null)
        {
            this.RemoveTrackingArea(tracking);
            tracking.Release();
        }
        tracking = new NSTrackingArea(this.Frame,NSTrackingAreaOptions.MouseEnteredAndExited | NSTrackingAreaOptions.ActiveAlways ,this, null);
        this.AddTrackingArea(tracking);
    }

    public override void MouseMoved(NSEvent theEvent)
    {
        Console.WriteLine("MouseMoved");
    }

    public override void MouseExited(NSEvent theEvent)
    {
        Console.WriteLine("MouseExitedTest");
    }
}

我的问题是如何将MouseTracking nsview添加到MyWindow并使这些鼠标事件可用?我在MyWindow构造函数中尝试过:

        MouseTracking tracking = new MouseTracking ();
        this.ContentView.AddSubview (tracking);

但是,这不起作用..我只想这样做(WinForms中的两行):

this.MouseDown += new System.Windows.Forms.MouseEventHandler(this.panel1_MouseDown);

private void panel1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e) { }

谢谢,求助

1 个答案:

答案 0 :(得分:0)

您不需要DrawRect来捕获鼠标事件。你需要构造函数:

    public MouseTracking(NSCoder coder)
        :base(coder)
    {
    }

    public MouseTracking(RectangleF frameRect)
        :base(frameRect)
    {
    }

你可能还需要(也许你还不知道)覆盖这个标志:

    public override bool AcceptsFirstMouse (NSEvent theEvent)
    {
        return true;
    }

是的,你将MouseTracking添加到MyWindow,就像你写的一样,所以:

    this.ContentView.AddSubview (tracking);