visual-studio 热获取相对于控件左上角的光标位置？
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Hot to get cursor position relative to upper left corner of the control?
提问by Alexander Stalt
When I clicked on a control,
当我点击一个控件时，
How to get cursor position relative to upper left corner of a (winforms) control ?
如何获取相对于（winforms）控件左上角的光标位置？
C#, VS 2005
C#，VS 2005
PS: I'm asking on context of tooltip "show" method which need that coordinates ..
PS：我在询问需要该坐标的工具提示“显示”方法的上下文..
回答by Bolek Tekielski
This is my code to set tooltips on a composite control, might give you a clue (LED derivers from UserControl):
这是我在复合控件上设置工具提示的代码，可能会给您一个线索（来自 UserControl 的 LED 派生器）：
public LED()
{
InitializeComponent();
m_Image = global::AdvAdmittance.Controls.Properties.Resources.ledgray_small;
m_ToolTip = new ToolTip();
m_ToolTip.AutoPopDelay = 5000;
m_ToolTip.InitialDelay = 1000;
m_ToolTip.ReshowDelay = 500;
m_ToolTip.ShowAlways = true;
m_LedPictureBox.MouseHover += new EventHandler(m_LedPictureBox_MouseHover);
m_LedPictureBox.MouseLeave += new EventHandler(m_LedPictureBox_MouseLeave);
m_LedPictureBox.Click += new EventHandler(m_LedPictureBox_Click);
}
void m_LedPictureBox_MouseHover(object sender, EventArgs e)
{
if (m_ToolTipText != string.Empty)
{
Point toolTipPoint = this.Parent.PointToClient(Cursor.Position);
toolTipPoint.Y -= 20;
m_ToolTip.Show(m_ToolTipText, this.Parent, toolTipPoint);
}
}
void m_LedPictureBox_MouseLeave(object sender, EventArgs e)
{
m_ToolTip.Hide(this.m_LedPictureBox);
}
回答by Alexander Stalt
Ahh, Thanks for an answer.
啊，谢谢解答。
All I need is a PointToClient method.
我只需要一个 PointToClient 方法。
I hope (maybe) it will be useful for other people, here "my" code.
我希望（也许）它对其他人有用，这里是“我的”代码。
I took almost all code from http://support.microsoft.com/kb/322634and modified three lines:
我从http://support.microsoft.com/kb/322634 中获取了几乎所有代码 并修改了三行：
void treeView1_MouseMove(object sender, MouseEventArgs e)
{
// Get the node at the current mouse pointer location.
TreeNode theNode = this.treeView1.GetNodeAt(e.X, e.Y);
// Set a ToolTip only if the mouse pointer is actually paused on a node.
if ((theNode != null))
{
// Verify that the tag property is not "null".
if (theNode.Tag != null)
{
// Change the ToolTip only if the pointer moved to a new node.
if (theNode.Tag.ToString() != this.toolTip1.GetToolTip(this.treeView1))
{
//this.toolTip1.SetToolTip(this.treeView1, theNode.Tag.ToString());
Point c = System.Windows.Forms.Cursor.Position;
Point p = treeView1.PointToClient(c);
this.toolTip1.Show(theNode.Tag.ToString(), treeView1, p);
}
}
else
{
this.toolTip1.SetToolTip(this.treeView1, "");
}
}
else // Pointer is not over a node so clear the ToolTip.
{
this.toolTip1.SetToolTip(this.treeView1, "");
}
}
