WPF,窗口拖动事件与窗口内控件点击事件
帮手程序(assister.exe)在运行鼠标自动操作脚本时,可以弹出置顶的悬浮窗口,实时显示程序运行状态。悬浮窗口上一个小按钮可以快速切换回帮手程序主窗口。如图:
这个悬浮窗口可以自由拖动到屏幕任意位置,避免遮挡其他操作窗口。实现该功能时,通常只需在窗口控件中处理PreviewMouseLeftButtonDown事件,并执行以下代码:
private void MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
if (e.LeftButton == MouseButtonState.Pressed)
{
this.DragMove();
}
}
然而,由于窗口内部包含按钮控件需要响应点击操作,上述代码会导致按钮点击事件无法触发。
修改后的解决方案是让窗口处理以下三个关键事件:
<Window
...
PreviewMouseLeftButtonDown="Window_PreviewMouseLeftButtonDown"
PreviewMouseMove="Window_PreviewMouseMove"
PreviewMouseLeftButtonUp="Window_PreviewMouseLeftButtonUp"
...
Topmost="True"
WindowStyle="None"
AllowsTransparency="True"
Background="Transparent"
>
private void Window_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
_mousePressedPosition = e.GetPosition(this);
}
private void Window_PreviewMouseMove(object sender, MouseEventArgs e)
{
if (Mouse.LeftButton == MouseButtonState.Pressed && _mousePressedPosition != e.GetPosition(this))
{
_isMouseDragMove = true;
DragMove();
}
}
private void Window_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
if (_isMouseDragMove)
{
_isMouseDragMove = false;
e.Handled = true;
}
}
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