From 351747745aa0cca64a314c033376e75171041de4 Mon Sep 17 00:00:00 2001
From: Shane Kearns <shane.kearns@sosco.com>
Date: Thu, 24 Sep 2009 19:13:22 +0200
Subject: Stop fluidlauncher timers when in background to save battery Changed
 fluidlauncher to use a stacked widget instead of two top level windows. Used
 the ActivationChange event to get notification from the OS window system when
 fluidlauncher is active. Slideshow related timers are stopped when the window
 is deactivated and restarted when activated.

Task-number: QT-886
Reviewed-by: Alessandro Portale
---
 demos/embedded/fluidlauncher/fluidlauncher.cpp | 27 +++++++++++++++++++++++---
 demos/embedded/fluidlauncher/fluidlauncher.h   |  5 ++++-
 demos/embedded/fluidlauncher/slideshow.cpp     |  5 ++---
 demos/embedded/fluidlauncher/slideshow.h       |  2 +-
 4 files changed, 31 insertions(+), 8 deletions(-)

diff --git a/demos/embedded/fluidlauncher/fluidlauncher.cpp b/demos/embedded/fluidlauncher/fluidlauncher.cpp
index 808f362..3cd3f3c 100644
--- a/demos/embedded/fluidlauncher/fluidlauncher.cpp
+++ b/demos/embedded/fluidlauncher/fluidlauncher.cpp
@@ -54,6 +54,10 @@ FluidLauncher::FluidLauncher(QStringList* args)
     slideShowWidget = new SlideShow();
     inputTimer = new QTimer();
 
+    addWidget(pictureFlowWidget);
+    addWidget(slideShowWidget);
+    setCurrentWidget(pictureFlowWidget);
+
     QRect screen_size = QApplication::desktop()->screenGeometry();
 
     QObject::connect(pictureFlowWidget, SIGNAL(itemActivated(int)), this, SLOT(launchApplication(int)));
@@ -80,7 +84,7 @@ FluidLauncher::FluidLauncher(QStringList* args)
     if (success) {
       populatePictureFlow();
 
-      pictureFlowWidget->showFullScreen();
+      showFullScreen();
       inputTimer->start();
     } else {
         pictureFlowWidget->setAttribute(Qt::WA_DeleteOnClose, true);
@@ -222,7 +226,6 @@ void FluidLauncher::launchApplication(int index)
     }
 
     inputTimer->stop();
-    pictureFlowWidget->hide();
 
     QObject::connect(demoList[index], SIGNAL(demoFinished()), this, SLOT(demoFinished()));
 
@@ -234,6 +237,7 @@ void FluidLauncher::switchToLauncher()
 {
     slideShowWidget->stopShow();
     inputTimer->start();
+    setCurrentWidget(pictureFlowWidget);
 }
 
 
@@ -253,11 +257,28 @@ void FluidLauncher::switchToSlideshow()
 {
     inputTimer->stop();
     slideShowWidget->startShow();
+    setCurrentWidget(slideShowWidget);
 }
 
 void FluidLauncher::demoFinished()
 {
-    pictureFlowWidget->showFullScreen();
+    setCurrentWidget(pictureFlowWidget);
     inputTimer->start();
 }
 
+void FluidLauncher::changeEvent(QEvent* event)
+{
+    if (event->type() == QEvent::ActivationChange) {
+        if (isActiveWindow()) {
+            if(currentWidget() == pictureFlowWidget) {
+                resetInputTimeout();
+            } else {
+                slideShowWidget->startShow();
+            }
+        } else {
+            inputTimer->stop();
+            slideShowWidget->stopShow();
+        }
+    }
+    QStackedWidget::changeEvent(event);
+}
diff --git a/demos/embedded/fluidlauncher/fluidlauncher.h b/demos/embedded/fluidlauncher/fluidlauncher.h
index 2c40526..ff742e2 100644
--- a/demos/embedded/fluidlauncher/fluidlauncher.h
+++ b/demos/embedded/fluidlauncher/fluidlauncher.h
@@ -50,7 +50,7 @@
 #include "slideshow.h"
 #include "demoapplication.h"
 
-class FluidLauncher : public QObject
+class FluidLauncher : public QStackedWidget
 {
     Q_OBJECT
 
@@ -65,6 +65,9 @@ public slots:
     void inputTimedout();
     void demoFinished();
 
+protected:
+    void changeEvent(QEvent *event);
+
 private:
     PictureFlow* pictureFlowWidget;
     SlideShow* slideShowWidget;
diff --git a/demos/embedded/fluidlauncher/slideshow.cpp b/demos/embedded/fluidlauncher/slideshow.cpp
index a397c2b..55daedf 100644
--- a/demos/embedded/fluidlauncher/slideshow.cpp
+++ b/demos/embedded/fluidlauncher/slideshow.cpp
@@ -83,7 +83,8 @@ void SlideShowPrivate::showNextSlide()
 
 
 
-SlideShow::SlideShow()
+SlideShow::SlideShow(QWidget* parent) :
+    QWidget(parent)
 {
     d = new SlideShowPrivate;
 
@@ -125,7 +126,6 @@ void SlideShow::clearImages()
 
 void SlideShow::startShow()
 {
-    showFullScreen();
     d->interSlideTimer.start(d->slideInterval, this);
     d->showNextSlide();
     update();
@@ -134,7 +134,6 @@ void SlideShow::startShow()
 
 void SlideShow::stopShow()
 {
-    hide();
     d->interSlideTimer.stop();
 }
 
diff --git a/demos/embedded/fluidlauncher/slideshow.h b/demos/embedded/fluidlauncher/slideshow.h
index 6d51662..214652e 100644
--- a/demos/embedded/fluidlauncher/slideshow.h
+++ b/demos/embedded/fluidlauncher/slideshow.h
@@ -53,7 +53,7 @@ class SlideShow : public QWidget
     Q_PROPERTY(int slideInterval READ slideInterval WRITE setSlideInterval)
 
 public:
-    SlideShow();
+    SlideShow(QWidget* parent = 0);
     ~SlideShow();
     void addImage(QString filename);
     void addImageDir(QString dirName);
-- 
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