qsui: reduced cpu usage (patch by Hong Jen Yee)

git-svn-id: http://svn.code.sf.net/p/qmmp-dev/code/trunk/qmmp@5428 90c681e8-e032-0410-971d-27865f9a5e38

3 files changed, 21 insertions, 1 deletions

diff --git a/src/plugins/Ui/qsui/mainwindow.cpp b/src/plugins/Ui/qsui/mainwindow.cpp
index 399eff06a..794e4505e 100644
--- a/src/plugins/Ui/qsui/mainwindow.cpp
+++ b/src/plugins/Ui/qsui/mainwindow.cpp
@@ -214,6 +214,7 @@ void MainWindow::showState(Qmmp::State state)
     case Qmmp::Playing:
     {
         updateStatus();
+        m_analyzer->start();
         m_analyzer->setCover(MetaDataManager::instance()->getCover(m_core->url()));
         CoverWidget *cw = qobject_cast<CoverWidget *>(m_ui.coverDockWidget->widget());
         cw->setCover(MetaDataManager::instance()->getCover(m_core->url()));
@@ -224,6 +225,7 @@ void MainWindow::showState(Qmmp::State state)
         break;
     case Qmmp::Stopped:
         updateStatus();
+        m_analyzer->stop();
         m_timeLabel->clear();
         m_slider->setValue(0);
         m_analyzer->clearCover();
diff --git a/src/plugins/Ui/qsui/qsuianalyzer.cpp b/src/plugins/Ui/qsui/qsuianalyzer.cpp
index 3df0b7935..04c867ce7 100644
--- a/src/plugins/Ui/qsui/qsuianalyzer.cpp
+++ b/src/plugins/Ui/qsui/qsuianalyzer.cpp
@@ -45,6 +45,7 @@ QSUiAnalyzer::QSUiAnalyzer (QWidget *parent) : Visual (parent)
     m_offset = 0;
     m_update = false;
     m_show_cover = false;
+    m_running = false;
     m_pixLabel = new QLabel(this);
     createMenu();
 
@@ -156,7 +157,8 @@ void QSUiAnalyzer::hideEvent (QHideEvent *)
 
 void QSUiAnalyzer::showEvent (QShowEvent *)
 {
-    m_timer->start();
+	if(m_running)
+		m_timer->start();
 }
 
 void QSUiAnalyzer::resizeEvent(QResizeEvent *)
@@ -402,3 +404,16 @@ void QSUiAnalyzer::writeSettings()
     settings.setValue("vis_show_cover", m_coverAction->isChecked());
     settings.endGroup();
 }
+
+void QSUiAnalyzer::start()
+{
+	m_running = true;
+    if(isVisible())
+        m_timer->start();
+}
+
+void QSUiAnalyzer::stop()
+{
+	m_running = false;
+	m_timer->stop();
+}
diff --git a/src/plugins/Ui/qsui/qsuianalyzer.h b/src/plugins/Ui/qsui/qsuianalyzer.h
index c2032f402..1c68e84f9 100644
--- a/src/plugins/Ui/qsui/qsuianalyzer.h
+++ b/src/plugins/Ui/qsui/qsuianalyzer.h
@@ -42,6 +42,8 @@ public:
     void clear();
     void clearCover();
     QSize sizeHint() const;
+    void start();
+    void stop();
 
 public slots:
     void readSettings();
@@ -91,6 +93,7 @@ private:
     QActionGroup *m_fpsGroup;
     QActionGroup *m_analyzerFalloffGroup;
     QActionGroup *m_peaksFalloffGroup;
+    bool m_running;
 };