C# 检测光标是否在控件范围内
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Detect if cursor is within the bounds of a control
提问by P.Brian.Mackey
I have a user control
我有一个用户控件
public partial class UserControl1 : UserControl, IMessageFilter
{
public UserControl1()
{
InitializeComponent();
Application.AddMessageFilter(this);
}
public bool PreFilterMessage(ref Message m)
{
var mouseLocation = Cursor.Position;
if (Bounds.Contains(PointToClient(mouseLocation)))
{
bool aBool = true;//breakpoint
bool two = aBool;//just assignment so compiler doesn't optimize my bool out
}
if (m.Msg != 0x20a) // Scrolling Message
{
return false;//ignore message
}
return false;
}
}
When I float over the user control contained in a parent form, the breakpoint is not hit. The breakpoint is hit in close proximity, but I can be in an actual textbox inside the user control and not get a hit. How can I accurately determine if I am within the bounds of this user control?
当我浮动在父窗体中包含的用户控件上时，不会命中断点。断点非常接近，但我可以在用户控件内的实际文本框中而不会被击中。如何准确确定我是否在此用户控件的范围内？
FWIW, I have two monitors. It does not appear to make a difference which monitor I am using.
FWIW，我有两个显示器。我使用的显示器似乎没有区别。
采纳答案by Jay Riggs
Try your hit testing against Control.ClientRectanglerather than Control.Bounds:
尝试针对Control.ClientRectangle而不是针对您的命中测试Control.Bounds：
if (ClientRectangle.Contains(PointToClient(Control.MousePosition))) {
bool aBool = true;//breakpoint
bool two = aBool;
}
回答by Hamid
just for fast trick, You can trigger all userconrol's control with one event and handle the mouse over events. for example if you had two textbox in your usercontrol
只是为了快速技巧，您可以使用一个事件触发所有用户控制的控件并处理鼠标悬停事件。例如，如果您的用户控件中有两个文本框
textBox1.MouseMove += new MouseEventHandler(controls_MouseMove);
textBox2.MouseMove += new MouseEventHandler(controls_MouseMove);
...
void controls_MouseMove(object sender, MouseEventArgs e)
{
Control subc=sender as Control;
int mouseX = MousePosition.X;
....
}
