void EnableLinkEvents()
{
if (!linkEventEnabled)
{
linkEventEnabled = true;
AllocEventBox();
EventsRootWidget.AddEvents((int)Gdk.EventMask.PointerMotionMask);
EventsRootWidget.MotionNotifyEvent += HandleMotionNotifyEvent;
EventsRootWidget.AddEvents((int)Gdk.EventMask.ButtonReleaseMask);
EventsRootWidget.ButtonReleaseEvent += HandleButtonReleaseEvent;
EventsRootWidget.AddEvents((int)Gdk.EventMask.LeaveNotifyMask);
EventsRootWidget.LeaveNotifyEvent += HandleLeaveNotifyEvent;
}
}
void SubscribeCursorEnterLeaveEvent()
{
if (!cursorEnterLeaveSubscribed)
{
cursorEnterLeaveSubscribed = true; // subscribe only once
EventsRootWidget.AddEvents((int)Gdk.EventMask.EnterNotifyMask);
EventsRootWidget.AddEvents((int)Gdk.EventMask.LeaveNotifyMask);
EventsRootWidget.EnterNotifyEvent += (o, args) => {
immediateCursorChange = true;
if (gdkCursor != null)
{
((Gtk.Widget)o).GdkWindow.Cursor = gdkCursor;
}
};
EventsRootWidget.LeaveNotifyEvent += (o, args) => {
immediateCursorChange = false;
((Gtk.Widget)o).GdkWindow.Cursor = null;
};
}
}
public virtual void EnableEvent(object eventId)
{
if (eventId is WidgetEvent)
{
WidgetEvent ev = (WidgetEvent)eventId;
switch (ev)
{
case WidgetEvent.DragLeave:
AllocEventBox();
EventsRootWidget.DragLeave += HandleWidgetDragLeave;
break;
case WidgetEvent.DragStarted:
AllocEventBox();
EventsRootWidget.DragBegin += HandleWidgetDragBegin;
break;
case WidgetEvent.KeyPressed:
Widget.KeyPressEvent += HandleKeyPressEvent;
break;
case WidgetEvent.KeyReleased:
Widget.KeyReleaseEvent += HandleKeyReleaseEvent;
break;
case WidgetEvent.GotFocus:
EventsRootWidget.AddEvents((int)Gdk.EventMask.FocusChangeMask);
Widget.FocusGrabbed += HandleWidgetFocusInEvent;
break;
case WidgetEvent.LostFocus:
EventsRootWidget.AddEvents((int)Gdk.EventMask.FocusChangeMask);
Widget.FocusOutEvent += HandleWidgetFocusOutEvent;
break;
case WidgetEvent.MouseEntered:
AllocEventBox();
EventsRootWidget.AddEvents((int)Gdk.EventMask.EnterNotifyMask);
EventsRootWidget.EnterNotifyEvent += HandleEnterNotifyEvent;
break;
case WidgetEvent.MouseExited:
AllocEventBox();
EventsRootWidget.AddEvents((int)Gdk.EventMask.LeaveNotifyMask);
EventsRootWidget.LeaveNotifyEvent += HandleLeaveNotifyEvent;
break;
case WidgetEvent.ButtonPressed:
AllocEventBox();
EventsRootWidget.AddEvents((int)Gdk.EventMask.ButtonPressMask);
EventsRootWidget.ButtonPressEvent += HandleButtonPressEvent;
break;
case WidgetEvent.ButtonReleased:
AllocEventBox();
EventsRootWidget.AddEvents((int)Gdk.EventMask.ButtonReleaseMask);
EventsRootWidget.ButtonReleaseEvent += HandleButtonReleaseEvent;
break;
case WidgetEvent.MouseMoved:
AllocEventBox();
EventsRootWidget.AddEvents((int)Gdk.EventMask.PointerMotionMask);
EventsRootWidget.MotionNotifyEvent += HandleMotionNotifyEvent;
break;
case WidgetEvent.BoundsChanged:
Widget.SizeAllocated += HandleWidgetBoundsChanged;
break;
case WidgetEvent.MouseScrolled:
AllocEventBox();
EventsRootWidget.AddEvents((int)Gdk.EventMask.ScrollMask);
Widget.ScrollEvent += HandleScrollEvent;
break;
}
if ((ev & dragDropEvents) != 0 && (enabledEvents & dragDropEvents) == 0)
{
// Enabling a drag&drop event for the first time
AllocEventBox();
EventsRootWidget.DragDrop += HandleWidgetDragDrop;
EventsRootWidget.DragMotion += HandleWidgetDragMotion;
EventsRootWidget.DragDataReceived += HandleWidgetDragDataReceived;
}
if ((ev & WidgetEvent.PreferredSizeCheck) != 0)
{
EnableSizeCheckEvents();
}
enabledEvents |= ev;
}
}