I have a bit of a situation. I have a UserControl which I will want to drag around a panel, I've found many tutorials on dragging things into controls, but I actually wish to change the X,Y location of the control.
I've tried using this:
... customControl.MouseDown += new MouseEventHandler(DragIt); } public void DragIt(object sender, MouseEventArgs e) { customControl.Location = new Point(e.X, e.Y); } |
But it would only drag when its clicked, and wouldn't simulate a real drag across the screen.
If anyone could help, I'd appreciate it. :)
Dragging an UserControl
Wolvorine
Looking at what you wrote, I seems it would move your control's top left corner to where ever on the control you clicked the mouse Is that correct
The way I have managed it in the past is along the lines of:
Save the controls original position and the point where the mouse was clicked down.
protected
override void OnMouseDown(MouseEventArgs e){
oldPoint =
Form.MousePosition;moving =
true; // Is we move while mouse button is held down then Yes we are moving.oldX = this.Location.X; // Controls locations
oldY = this.Location.Y; // ""
}
// Then for every mouse move event move your control by the same amount:
protected
override void OnMouseMove(MouseEventArgs e){
if (moving){
int xDiff, yDiff;newPoint =
Form.MousePosition;xDiff = newPoint.X - oldPoint.X; // How much have we moved
yDiff = newPoint.Y - oldPoint.Y;
oldPoint.X = newPoint.X; // Update the oldpoint to the new point.
oldPoint.Y = newPoint.Y;
oldX = oldX + xDiff; // Now define the new location for the control
oldY = oldY + yDiff;
this.Location =
new Point( oldX, oldY);}
}
// NOTE: IMPORTANT
// Then finally on the "mouseup" event set "moving" back to false
Probably not the most attractive or efficient way of doing it but it worked for me.
Hope it helps