当按钮仍然按下时如何转移鼠标操作的控制权
我有一系列 Panel 事件 - MouseDown 、 MouseMove 、 MouseUp 。我还在该 Panel 上为 Label 提供了事件处理程序。但在某些情况下，我希望 Label 的 MouseMove 处理程序将操作的控制权“转移”到 Panel 的处理程序。问题是该操作被“锁定”到Label，因此诸如panel1.MouseMove += ...之类的内容将无济于事，因为panel1.MouseMove在 。有没有办法“转移控制权”？MouseUp 之前不会引发
这是我所拥有的一个简单示例：（label1 位于 panel1 上）。
public Form1()
{
InitializeComponent();
label1.MouseDown += label1_MouseDown;
}
void label1_MouseDown(object sender, MouseEventArgs e)
{
panel1.MouseMove += panel1_MouseMove;
}
void panel1_MouseMove(object sender, MouseEventArgs e)
{
Text = "success";
}
在 MouseUp 之前，文本不会更改。
I have a series of events for a Panel – MouseDown , MouseMove , MouseUp. I also have event handlers for a Label on that Panel. But in certain cases I want the MouseMove handler of the Label to "transfer control" of the operation to the Panel's handlers. Problem is that the action is "locked" to the Label, so something like panel1.MouseMove += ... won't help because the panel1.MouseMove won't be raised until a MouseUp. Is there any way to "transfer control" of the operation?
Here's a simple example of what I have: (label1 is on panel1).
public Form1()
{
InitializeComponent();
label1.MouseDown += label1_MouseDown;
}
void label1_MouseDown(object sender, MouseEventArgs e)
{
panel1.MouseMove += panel1_MouseMove;
}
void panel1_MouseMove(object sender, MouseEventArgs e)
{
Text = "success";
}
The Text isn't changed until MouseUp.
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需要时，您只需在
label1_MouseDown中调用panel1_MouseMove即可。You could simply call the
panel1_MouseMoveinlabel1_MouseDownwhen needed.