The homescreenChanged(bool isOnCurrentHomescreen) signal from QMaemo5HomescreenAdaptor is always emitted with isOnCurrentHomescreen = false.

Using the QMaemo5HomescreenAdaptor class as provided in http://qt.gitorious.org/qt-labs/maemo5-homescreen the homescreenChanged(bool isOnCurrentHomescreen) signal is always emitted with isOnCurrentHomescreen = false, no matter if the homescreen widget is on the current screen or not.

To reproduce this issue create a homescreen widget and connect a slot of the widget to the adaptors homescreenChanged(bool isOnCurrentHomescreen) signal.
The actual outcome is that the signal is emitted always with isOnCurrentHomescreen = false.
Expected behavior would be that isOnCurrentHomescreen is true if the homescreen widget is shown on the current screen and only false if the widget is not displayed.
I attached a modified version of the qt4-homescreen-example which illustrates the issue (both as installable .deb file and source code).

This issue can be fixed as shown in the following diff:
— qmaemo5homescreenadaptor.cpp.orig 2010-12-18 17:02:51.407000259 +0100
+++ qmaemo5homescreenadaptor.cpp 2010-12-18 16:39:11.842000266 +0100
@@ -324,7 +324,7 @@
if (ev->xproperty.atom == hsAtoms[HildonAppletOnCurrentDesktop]) {
for (int i = 0; i < allDesktopItems.count(); ++i) {
if (allDesktopItems.at>appletWidget()>winId() == ev->xproperty.window)

{ - emit allDesktopItems.at(i)->homescreenChanged(ev->xproperty.window == 0); + emit allDesktopItems.at(i)->homescreenChanged(ev->xproperty.state == 0); retval = true; }

}