BT: qt demo takes 100% of the cpu on X11

The tick timer is always active, even if the moving gree Qt logo is not visible.
But the code that is supposed to pause it when the app loose the focus doesn't works if
the moving Qt logo is not visible.

Also the call to syncX makes Xorg takes lot of cpu.

It doesn't fix the fact that the timer is still running while the green logo is not visible,
but at least doesn't take the cpu anymore if qtdemo loose the focus.

Task-number: 255020
Reviewed-by: Richard Moe Gustavsen

1 files changed, 2 insertions, 11 deletions

diff --git a/demos/qtdemo/mainwindow.cpp b/demos/qtdemo/mainwindow.cpp
index 8723823526..16ca95fbe8 100644
--- a/demos/qtdemo/mainwindow.cpp
+++ b/demos/qtdemo/mainwindow.cpp
@@ -190,7 +190,6 @@ void MainWindow::switchTimerOnOff(bool on)
 
     if (on && !Colors::noTimerUpdate){
         this->useTimer = true;
-        this->setViewportUpdateMode(QGraphicsView::NoViewportUpdate);
         this->fpsTime = QTime::currentTime();
         this->updateTimer.start(int(1000 / Colors::fps));
     }
@@ -262,10 +261,6 @@ void MainWindow::tick()
     if (MenuManager::instance()->ticker)
         MenuManager::instance()->ticker->tick();
 
-    this->viewport()->update();
-    if (Colors::softwareRendering)
-        QApplication::syncX();
-
     if (this->useTimer)
         this->updateTimer.start(int(1000 / Colors::fps));
 }
@@ -435,9 +430,7 @@ void MainWindow::focusInEvent(QFocusEvent *)
     if (MenuManager::instance()->ticker)
         MenuManager::instance()->ticker->pause(false);
 
-    int code = MenuManager::instance()->currentMenuCode;
-    if (code == MenuManager::ROOT || code == MenuManager::MENU1)
-        this->switchTimerOnOff(true);
+    this->switchTimerOnOff(true);
 
     this->pausedLabel->setRecursiveVisible(false);
 }
@@ -450,9 +443,7 @@ void MainWindow::focusOutEvent(QFocusEvent *)
     if (MenuManager::instance()->ticker)
         MenuManager::instance()->ticker->pause(true);
 
-    int code = MenuManager::instance()->currentMenuCode;
-    if (code == MenuManager::ROOT || code == MenuManager::MENU1)
-        this->switchTimerOnOff(false);
+    this->switchTimerOnOff(false);
 
     this->pausedLabel->setRecursiveVisible(true);
 }