// Lower a popup to the bottom of the mapped list.
public void LowerPopup(PopupWindow popup)
{
int index;
lock (this)
{
for (index = list.Length - 1; index >= 0; --index)
{
if (list[index] == popup)
{
while (index > 0)
{
list[index] = list[index - 1];
--index;
}
list[0] = popup;
return;
}
}
}
}
// Change the "lastEntered" and "lastChildEntered" window.
// The popup is entered before the child and left after.
private void ChangeEntered(PopupWindow popup, InputOutputWidget child)
{
PopupWindow before = null;
PopupWindow after = null;
InputOutputWidget childBefore = null;
InputOutputWidget childAfter = null;
lock (this)
{
if (lastEntered != popup)
{
before = lastEntered;
after = popup;
lastEntered = popup;
}
if (lastChildEntered != child)
{
childBefore = lastChildEntered;
childAfter = child;
lastChildEntered = child;
}
}
if (before != null)
{
if (childBefore != null)
{
FakeLeave(childBefore);
}
FakeLeave(before);
}
if (after != null)
{
FakeEnter(after);
if (childAfter != null)
{
FakeEnter(childAfter);
}
}
}
// 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;
}
}
// 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;
}
}
// Change the "lastEntered" and "lastChildEntered" window.
// The popup is entered before the child and left after.
private void ChangeEntered(PopupWindow popup, InputOutputWidget child)
{
PopupWindow before = null;
PopupWindow after = null;
InputOutputWidget childBefore = null;
InputOutputWidget childAfter = null;
lock(this)
{
if(lastEntered != popup)
{
before = lastEntered;
after = popup;
lastEntered = popup;
}
if(lastChildEntered != child)
{
childBefore = lastChildEntered;
childAfter = child;
lastChildEntered = child;
}
}
if(before != null)
{
if (childBefore != null)
FakeLeave(childBefore);
FakeLeave(before);
}
if(after != null)
{
FakeEnter(after);
if (childAfter != null)
FakeEnter(childAfter);
}
}
// Lower a popup to the bottom of the mapped list.
public void LowerPopup(PopupWindow popup)
{
int index;
lock(this)
{
for(index = list.Length - 1; index >= 0; --index)
{
if(list[index] == popup)
{
while(index > 0)
{
list[index] = list[index - 1];
--index;
}
list[0] = popup;
return;
}
}
}
}
// Remove a popup from the mapped list.
public void RemovePopup(PopupWindow popup)
{
int index;
lock(this)
{
for(index = list.Length - 1; index >= 0; --index)
{
if(list[index] == popup)
{
// Remove the item from the list.
PopupWindow[] newList;
newList = new PopupWindow [list.Length - 1];
Array.Copy(list, 0, newList, 0, index);
Array.Copy(list, index + 1, newList, index,
list.Length - index - 1);
list = newList;
// If this was the entered window, then
// send it a fake "LeaveNotify" event.
if(lastChildEntered != null &&
lastChildEntered.Parent == popup)
{
FakeLeave(lastChildEntered);
lastChildEntered = null;
}
if(lastEntered == popup)
{
lastEntered = null;
FakeLeave(popup);
}
// If this was the button window, then clear it.
if(lastButton == popup)
{
lastButton = null;
}
// If the list is now empty, then ungrab.
if(list.Length == 0)
{
Ungrab();
}
return;
}
}
}
}
// Add a popup to the top of the mapped list.
public void AddPopup(PopupWindow popup)
{
int index;
lock(this)
{
// See if the popup is already in the list.
for(index = 0; index < list.Length; ++index)
{
if(list[index] == popup)
{
while(index < (list.Length - 1))
{
list[index] = list[index + 1];
++index;
}
list[index] = popup;
return;
}
}
// Re-allocate the list and add the new item.
PopupWindow[] newList = new PopupWindow [list.Length + 1];
Array.Copy(list, 0, newList, 0, list.Length);
newList[list.Length] = popup;
list = newList;
// If the list now contains one item, then grab.
if(list.Length == 1)
{
Grab();
}
}
}
