/// <summary>
/// Process mouse events from the parent window
/// </summary>
/// <param name="sender">The object which initiates the event</param>
/// <param name="args">The context of the event</param>
public bool WindowOnMouseEvent(object sender, MouseEventArgs args)
{
var isClickEvent = args is MouseButtonEventArgs;
var focused = false;
var prevFocusedControl = _focusedControl;
// process the mouse events from the top-down, focusing on the topmost control if it's clicked on
foreach (var control in Controls.OrderByDescending(control => control.ZIndex))
{
var stage = control.ProcessMouseEvent(sender, args);
if (stage != EventStage.Handled || !control.CanFocus || focused)
{
continue;
}
SetFocus(control);
focused = true;
}
// if nothing was clicked on, blur all controls
if (!focused && isClickEvent)
{
SetFocus(null);
}
// return if we don't need to process click or double click events
if (_focusedControl == null || _focusedControl != prevFocusedControl ||
!(args is MouseButtonEventArgs buttonEvent) ||
buttonEvent.IsPressed)
{
return(focused);
}
var now = DateTime.Now;
// check eligibility of click events
var doubleClick = _focusedControl == _clickedControl &&
(now - _clickTime).TotalMilliseconds < KNativeMethods.GetDoubleClickTime();
var result = _focusedControl.ProcessMouseEvent(sender, new KMouseClickEventArgs(args, doubleClick));
// reset the clicked control after double click events
_clickTime = now;
_clickedControl = doubleClick ? null : _focusedControl;
return(result == EventStage.Handled);
}
/// <summary>
/// Sets the focus to the specified control
/// </summary>
/// <param name="needle">The control to focus on. Pass null to blur all elements.</param>
private void SetFocus(KuatControl needle)
{
_focusedControl = needle;
foreach (var control in Controls)
{
var wasFocus = control.HasFocus;
control.HasFocus = control == needle;
if (wasFocus && !control.HasFocus)
{
control.OnBlur(this, EventArgs.Empty);
}
else if (!wasFocus && control.HasFocus)
{
control.OnFocus(this, EventArgs.Empty);
}
}
}
