public sealed class MouseEventBubbler
{
private readonly Control _attachTo;
public MouseEventBubbler(Control attachTo)
{
_attachTo = attachTo;
_attachTo.MouseMove += _attachTo_MouseMove;
_attachTo.ControlAdded += _attachTo_ControlAdded;
_attachTo.ControlRemoved += _attachTo_ControlRemoved;
foreach (Control control in _attachTo.Controls)
{
AttachToControl(control);
}
}
public void _attachTo_MouseMove(object sender, MouseEventArgs e)
{
OnMouseMove(e);
}
public event MouseEventHandler MouseMove;
private void _attachTo_ControlAdded(object sender, ControlEventArgs e)
{
AttachToControl(e.Control);
}
private void _attachTo_ControlRemoved(object sender, ControlEventArgs e)
{
DetachFromControl(e.Control);
}
private void AttachToControl(Control c)
{
c.MouseMove += Child_MouseMove;
c.ControlAdded += Child_ControlAdded;
c.ControlRemoved += Child_ControlRemoved;
AttachToChildren(c);
}
private void AttachToChildren(Control parent)
{
foreach (Control child in parent.Controls)
{
AttachToControl(child);
}
}
private void DetachFromControl(Control c)
{
DetachFromChildren(c);
c.MouseMove -= Child_MouseMove;
c.ControlAdded -= Child_ControlAdded;
c.ControlRemoved -= Child_ControlRemoved;
}
private void DetachFromChildren(Control parent)
{
foreach (Control child in parent.Controls)
{
DetachFromControl(child);
}
}
private void Child_ControlAdded(object sender, ControlEventArgs e)
{
AttachToControl(e.Control);
}
private void Child_ControlRemoved(object sender, ControlEventArgs e)
{
DetachFromControl(e.Control);
}
private void Child_MouseMove(object sender, MouseEventArgs e)
{
var pt = e.Location;
var child = (Control)sender;
do
{
pt.Offset(child.Left, child.Top);
child = child.Parent;
}
while (child != _attachTo);
var newArgs = new MouseEventArgs(e.Button, e.Clicks, pt.X, pt.Y, e.Delta);
OnMouseMove(newArgs);
}
private void OnMouseMove(MouseEventArgs newArgs)
{
var h = MouseMove;
if (h != null)
{
h(this, newArgs);
}
}
}
