// Send a fake "LeaveNotify" event to a popup window.
private static void FakeLeave(InputOutputWidget window)
{
if (window != null)
{
XEvent xevent = new XEvent();
xevent.xany.type__ =
(Xlib.Xint)(int)(EventType.LeaveNotify);
window.DispatchEvent(ref xevent);
}
}
// Dispatch an event to this widget.
internal override void DispatchEvent(ref XEvent xevent)
{
XKeySym keysym;
PopupWindow popup;
InputOutputWidget child = null;
switch ((EventType)(xevent.xany.type__))
{
case EventType.ButtonPress:
{
// A mouse button was pressed during the grab.
lock (this)
{
if (lastButton != null)
{
// We currently have a button window, so
// all mouse events should go to it.
popup = lastButton;
}
else
{
// Determine which popup contains the mouse.
// If nothing contains, then use the top.
popup = Find(xevent.xbutton.x_root,
xevent.xbutton.y_root, true);
}
lastButton = popup;
}
// Find the child window.
child = FindChild(popup, xevent.xbutton.x_root,
xevent.xbutton.y_root);
ChangeEntered(popup, child);
if (popup != null)
{
// Adjust the co-ordinates and re-dispatch.
xevent.xbutton.x__ =
(Xlib.Xint)(xevent.xbutton.x_root - popup.x);
xevent.xbutton.y__ =
(Xlib.Xint)(xevent.xbutton.y_root - popup.y);
popup.DispatchEvent(ref xevent);
// Re-dispatch to the child window if necessary.
if (child != null)
{
xevent.xbutton.x__ -= child.x;
xevent.xbutton.y__ -= child.y;
child.DispatchEvent(ref xevent);
}
}
}
break;
case EventType.ButtonRelease:
{
// A mouse button was released during the grab.
lock (this)
{
popup = lastButton;
if (popup != null)
{
// Reset "lastButton" if this is the last
// button to be released.
ModifierMask mask = ModifierMask.AllButtons;
mask &= (ModifierMask) ~((int)ModifierMask.Button1Mask <<
((int)(xevent.xbutton.button__) - 1));
if ((xevent.xbutton.state & mask) == 0)
{
lastButton = null;
}
}
}
// Find the child window.
child = FindChild(popup, xevent.xbutton.x_root,
xevent.xbutton.y_root);
ChangeEntered(popup, child);
if (popup != null)
{
// Adjust the co-ordinates and re-dispatch.
xevent.xbutton.x__ =
(Xlib.Xint)(xevent.xbutton.x_root - popup.x);
xevent.xbutton.y__ =
(Xlib.Xint)(xevent.xbutton.y_root - popup.y);
popup.DispatchEvent(ref xevent);
// Re-dispatch to the child window if necessary.
if (child != null)
{
xevent.xbutton.x__ -= child.x;
xevent.xbutton.y__ -= child.y;
child.DispatchEvent(ref xevent);
}
}
}
break;
case EventType.MotionNotify:
{
// The mouse pointer was moved during the grab.
lock (this)
{
// If there is a last button window, then use
// that, otherwise find the one under the mouse.
popup = lastButton;
if (popup == null)
{
popup = Find(xevent.xmotion.x_root,
xevent.xmotion.y_root, false);
}
}
// Find the child window.
child = FindChild(popup, xevent.xbutton.x_root,
xevent.xbutton.y_root);
ChangeEntered(popup, child);
if (popup != null)
{
// Adjust the co-ordinates and re-dispatch.
xevent.xmotion.x__ =
(Xlib.Xint)(xevent.xmotion.x_root - popup.x);
xevent.xmotion.y__ =
(Xlib.Xint)(xevent.xmotion.y_root - popup.y);
popup.DispatchEvent(ref xevent);
// Re-dispatch to the child window if necessary.
if (child != null)
{
xevent.xbutton.x__ -= child.x;
xevent.xbutton.y__ -= child.y;
child.DispatchEvent(ref xevent);
}
}
}
break;
case EventType.KeyPress:
{
// Convert the event into a symbol and a string.
if (keyBuffer == IntPtr.Zero)
{
keyBuffer = Marshal.AllocHGlobal(32);
}
keysym = 0;
int len = Xlib.XLookupString
(ref xevent.xkey, keyBuffer, 32,
ref keysym, IntPtr.Zero);
String str;
if (len > 0)
{
str = Marshal.PtrToStringAnsi(keyBuffer, len);
}
else
{
str = null;
}
// Dispatch the event to the top-most popup.
lock (this)
{
if (list.Length > 0)
{
popup = list[list.Length - 1];
}
else
{
popup = null;
}
}
if (popup != null)
{
// Find the child window.
child = FindFocusedChild(popup);
if (child == null)
{
popup.DispatchKeyEvent
((KeyName)keysym, xevent.xkey.state, str);
}
else
{
child.DispatchKeyEvent
((KeyName)keysym, xevent.xkey.state, str);
}
}
}
break;
case EventType.KeyRelease:
{
// Convert the event into a symbol and a string.
if (keyBuffer == IntPtr.Zero)
{
keyBuffer = Marshal.AllocHGlobal(32);
}
keysym = 0;
int len = Xlib.XLookupString
(ref xevent.xkey, keyBuffer, 32,
ref keysym, IntPtr.Zero);
// Dispatch the event to the top-most popup.
lock (this)
{
if (list.Length > 0)
{
popup = list[list.Length - 1];
}
else
{
popup = null;
}
}
if (popup != null)
{
// Find the child window.
child = FindFocusedChild(popup);
if (child == null)
{
popup.DispatchKeyReleaseEvent
((KeyName)keysym, xevent.xkey.state);
}
else
{
child.DispatchKeyReleaseEvent
((KeyName)keysym, xevent.xkey.state);
}
}
}
break;
default:
{
// Everything else is handled normally.
base.DispatchEvent(ref xevent);
}
break;
}
}
// Send a fake "LeaveNotify" event to a popup window.
private static void FakeLeave(InputOutputWidget window)
{
if(window != null)
{
XEvent xevent = new XEvent();
xevent.xany.type__ =
(Xlib.Xint)(int)(EventType.LeaveNotify);
window.DispatchEvent(ref xevent);
}
}