QNX: Add option to disable screen power save from an envvar

Qt itself has no API for disabling screen power save, although this might make an interesting addition at some point. Instead we make the QNX QPA plugin determine if power save should be disabled from the QQNX_DISABLE_POWER_SAVE environment variable. This would typically be set in the application's bar descriptor file. Change-Id: Ie195ecd0496efd533ad9a32b65883283f471c534 Reviewed-by: Kevin Krammer <[email protected]> Reviewed-by: Rafael Roquetto <[email protected]>
wangkaigithub · Jun 19, 2013 · 5f49467 · 5f49467
1 parent 249c5f0
commit 5f49467
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/src/plugins/platforms/qnx/qqnxrootwindow.cpp b/src/plugins/platforms/qnx/qqnxrootwindow.cpp
@@ -162,6 +162,16 @@ QQnxRootWindow::QQnxRootWindow(const QQnxScreen *screen)
     if (result != 0)
         qFatal("QQnxRootWindow: failed to set window source position, errno=%d", errno);
 
+    // Optionally disable the screen power save
+    bool ok = false;
+    const int disablePowerSave = qgetenv("QQNX_DISABLE_POWER_SAVE").toInt(&ok);
+    if (ok && disablePowerSave) {
+        const int mode = SCREEN_IDLE_MODE_KEEP_AWAKE;
+        result = screen_set_window_property_iv(m_window, SCREEN_PROPERTY_IDLE_MODE, &mode);
+        if (result != 0)
+            qWarning("QQnxRootWindow: failed to disable power saving mode");
+    }
+
     createWindowGroup();
 
     // Don't post yet. This will be lazily done from QQnxScreen upon first posting of