MWsWindowVisibilityNotifier Class Reference
| class MWsWindowVisibilityNotifier : public MWsObjectProvider |
This interface may be implemented by a render stage wishing to take over responsibility from WSERV, for updating a window's visible region. For example, if a render stage introduces non-WSERV visuals which overlap WSERV windows, WSERV may need to receive updated window visibility information.
Immediately after sucessfully obtaining this interface, WSERV will call RegisterWindowVisibilityObserver to provide a means for the render stage to notify WSERV when window visibility changes.
MWsWindowVisibilityObserver
Inherits from
- MWsWindowVisibilityNotifier
Member Functions Documentation
RegisterWindow(const MWsWindow &)
| void | RegisterWindow | ( | const MWsWindow & | aWindow | ) | [pure virtual] |
Register to be notified when visibility of a specific window changes. After registering a window, the render stage must immediately provide the current visible region by calling VisibilityChanged() and later, in response to SendVisibilityChanges, call SetWindowVisibility. RegisterWindow and UnregisterWindow are symmetrical operations. For each call to RegisterWindow, there will follow exactly one call to UnregisterWindow. MWsWindowVisibilityObserver
Parameters
| const MWsWindow & aWindow | Window for which WSERV needs accurate visibility information. |
RegisterWindowVisibilityObserver(MWsWindowVisibilityObserver *)
Register to be notified when window visibility changes.
SendVisibilityChanges()
| void | SendVisibilityChanges | ( | ) | [pure virtual] |
Asks the render stage to call SetWindowVisibility for each window whose visible region has changed. All visible region changes must be sent before this method returns. MWsWindowVisibilityObserver
UnregisterWindow(const MWsWindow &)
| void | UnregisterWindow | ( | const MWsWindow & | aWindow | ) | [pure virtual] |
Stops visibility notifications being sent for the specified window. RegisterWindow and UnregisterWindow are symmetrical operations. For each call to RegisterWindow, there will follow exactly one call to UnregisterWindow.
Parameters
| const MWsWindow & aWindow | Window for which visibility notifications are no longer required. |
Copyright ©2010 Nokia Corporation and/or its subsidiary(-ies).
All rights
reserved. Unless otherwise stated, these materials are provided under the terms of the Eclipse Public License
v1.0.