Get cursor position with respect to the control - C#

问题

I want to get the mouse position with respect to the control in which mouse pointer is present. That means when I place the cursor to the starting point (Top-Left corner) of control it should give (0,0). I am using the following code:

    private void panel1_MouseMove(object sender, MouseEventArgs e)
    {
        this.Text = Convert.ToString(Cursor.Position.X + ":" + Cursor.Position.Y);         
    }

But this gives the position with respect to the screen not to the control.

Code sample will be appreciated.

回答1:

You can directly use the Location property of the MouseEventArgs argument passed to your event-handler.

private void panel1_MouseMove(object sender, MouseEventArgs e)
{
    Text = e.Location.X + ":" + e.Location.Y;      
}

回答2:

Use Control.PointToClient to convert a point from screen-relative coords to control-relative coords. If you need to go the other way, use PointToScreen.

回答3:

The following will give you mouse coordinates relative to your control. For example, this results in (0,0) if mouse is over top left corner of the control:

var coordinates = yourControl.PointToClient(Cursor.Position);

回答4:

One can use following methods for getting the relative from absolute and absolute from relative coordinates:

Point Control.PointToClient(Point point);

Point Control.PointToScreen(Point point);

回答5:

Cursor.Position return Point on Screen, but Control.PointToClient(Cursor.Position) returns point on control (e.g. control -> panel). In your case, you have e.Locate which return point on control.

回答6:

Simply subtract from the cursor position the Left and Top coordinates of the control:

this.Text = Convert.ToString(
    Cursor.Position.X - this.Left + ":" +
    Cursor.Position.Y - this.Top);

回答7:

I use MouseLocation and PointToClient to check. And then use it in a timer!

bool IsMouseHover(Control c, Control container)
        {
            Point p = Control.MousePosition;
            Point p1 = c.PointToClient(p);
            Point p2 = container.PointToClient(p);
            if (c.DisplayRectangle.Contains(p1) && container.DisplayRectangle.Contains(p2))
            {
                return true;
            }
            return false;
        }

回答8:

private void lienzo_MouseLeftButtonDown_1(object sender, MouseButtonEventArgs e)
{
    Point coordenadas = new Point();
    coordenadas = Mouse.GetPosition(lienzo);

    string msg = "Coordenadas mouse :" + coordenadas.X + "," + coordenadas.Y;
    MessageBoxResult resultado;
    string titulo = "Informacion";
    MessageBoxButton botones = MessageBoxButton.OK;
    MessageBoxImage icono = MessageBoxImage.Information;

    resultado = MessageBox.Show(msg, titulo, botones, icono);
}

Where "lienzo" is my canvas panel

来源：https://stackoverflow.com/questions/8201286/get-cursor-position-with-respect-to-the-control-c-sharp

标签

winforms

mouse

mouse-position