void host_MouseDown(object sender, MouseEventArgs e)
{
if (bounds.Contains(e.X, e.Y))
{
// arg is relative to this control
MouseEventArgs arg = new MouseEventArgs(e.Button, e.Clicks, e.X - Left, e.Y - Top, e.Delta);
WindowlessControl eventReciever = null;
// Event needs to go to most-nested control than contains click
foreach (WindowlessControl c in controls)
{
if (c.bounds.Contains(arg.X, arg.Y))
{
c.host_MouseDown(this, arg);
eventReciever = c;
mouseLock = eventReciever;
}
}
// If no nested control get click, this control gets it
if (eventReciever == null)
{
OnMouseDown(arg);
mouseLock = this;
}
}
}
/// <summary>
/// Finds the control at the specified location relative to this
/// control's bounds.
/// </summary>
/// <param name="point"></param>
/// <returns>The most-nested control at the specified point. If there
/// are overlapping controls at the point, the top-most will be
/// returned. If the point is outside this controls bounds, the return
/// value is null.</returns>
private WindowlessControl FindControlAt(Point point)
{
if (point.X < 0 || point.Y < 0 || point.X >= Width || point.Y >= Height)
{
return(null);
}
// We loop through all controls, rather than returning first hit.
// This way, when controls overlap, we find the top-most (will be
// later in collection).
WindowlessControl result = this; // If no contained controls are found, we should return this.
foreach (WindowlessControl c in controls)
{
if (c.bounds.Contains(point))
{
Point relativePoint = point;
relativePoint.Offset(-c.Left, -c.Top);
// Recursion finds most-nested control
WindowlessControl containedControl = c.FindControlAt(relativePoint);
if (containedControl == null)
{
result = c;
}
else
{
result = containedControl;
}
}
}
return(result);
}
public void Dispose()
{
if (source != null)
{
source.ResumePaint();
}
source = null;
}
private void ClearMouseContainer()
{
WindowlessControl c = mouseContainer;
mouseContainer = null;
if (c != null)
{
c.OnMouseLeave();
}
}
private void SwitchMouseFocus(WindowlessControl newMouseContainer)
{
WindowlessControl oldMouseContainer = mouseContainer;
mouseContainer = newMouseContainer;
if (oldMouseContainer != null)
{
oldMouseContainer.OnMouseLeave();
}
if (newMouseContainer != null)
{
newMouseContainer.OnMouseEnter();
}
}
/// <summary>
/// Causes the MouseLeave event to raised if necessary by removing this control as the mouse container.
/// </summary>
private void FreeMouse()
{
WindowlessControl root = Root;
if (root.mouseContainer == this)
{
root.ClearMouseContainer();
}
foreach (WindowlessControl c in controls)
{
if (root.mouseContainer == c)
{
root.ClearMouseContainer();
}
}
}
void host_MouseUp(object sender, MouseEventArgs e)
{
MouseEventArgs arg = new MouseEventArgs(e.Button, e.Clicks, e.X - Left, e.Y - Top, e.Delta);
if (mouseLock == null)
{
// If there is no lock, route event normally.
if (bounds.Contains(e.X, e.Y))
{
WindowlessControl eventReciever = null;
// Event needs to go to most-nested control than contains mouse
foreach (WindowlessControl c in controls)
{
if (c.bounds.Contains(arg.X, arg.Y))
{
c.host_MouseUp(this, arg);
eventReciever = c;
}
}
// If no nested control get click, this control gets it
if (eventReciever == null)
{
OnMouseUp(arg);
}
}
}
else if (mouseLock == this)
{
OnMouseUp(arg);
}
else
{
mouseLock.host_MouseUp(this, arg);
}
mouseLock = null;
}
public SuspendPaintOperation(WindowlessControl source)
{
this.source = source;
}
protected virtual void OnParentChanged(WindowlessControl oldParent)
{
}
void host_MouseMove(object sender, MouseEventArgs e)
{
if (!visible)
{
return;
}
MouseEventArgs arg = new MouseEventArgs(e.Button, e.Clicks, e.X - Left, e.Y - Top, e.Delta);
if (mouseLock == null)
{
// Root control manages mouse focus
if (isRoot)
{
WindowlessControl newMouseContainer = FindControlAt(e.Location);
if (newMouseContainer != mouseContainer)
{
SwitchMouseFocus(newMouseContainer);
}
}
// If there is no lock, route event normally.
if (!bounds.Contains(e.X, e.Y))
{
//LoseMouse();
}
else
{
WindowlessControl eventReciever = null;
// Event needs to go to most-nested control than contains mouse
foreach (WindowlessControl c in controls)
{
if (!c.bounds.Contains(arg.X, arg.Y))
{
//c.LoseMouse();
}
else
{
c.host_MouseMove(this, arg);
eventReciever = c;
}
}
// If no nested control gets click, this control gets it
if (eventReciever == null)
{
OnMouseMove(arg);
}
//GetMouse();
}
}
else if (mouseLock == this)
{
OnMouseMove(arg);
}
else
{
mouseLock.host_MouseMove(this, arg);
}
}