From 2de957bd0b9d56fc5e40c833b8d404474c93992f Mon Sep 17 00:00:00 2001
From: Ludovic Fauvet <etix@l0cal.com>
Date: Thu, 10 Dec 2009 15:13:55 +0100
Subject: [PATCH] PreviewWidget: GUI support for markers

---
 src/GUI/PreviewRuler.cpp  | 47 ++++++++++++++++++++++++++++++++++++++-
 src/GUI/PreviewRuler.h    | 12 ++++++++++
 src/GUI/PreviewWidget.cpp | 13 +++++++++++
 src/GUI/PreviewWidget.h   |  2 ++
 4 files changed, 73 insertions(+), 1 deletion(-)

diff --git a/src/GUI/PreviewRuler.cpp b/src/GUI/PreviewRuler.cpp
index 5b493151..aa3cf643 100644
--- a/src/GUI/PreviewRuler.cpp
+++ b/src/GUI/PreviewRuler.cpp
@@ -34,6 +34,8 @@ PreviewRuler::PreviewRuler( QWidget* parent ) :
 {
     setMouseTracking( true );
     m_isSliding = false;
+    m_markerStart = MARKER_DEFAULT;
+    m_markerStop = MARKER_DEFAULT;
 }
 
 void PreviewRuler::setRenderer( GenericRenderer* renderer )
@@ -48,6 +50,8 @@ void PreviewRuler::setRenderer( GenericRenderer* renderer )
              this, SLOT( update() ) );
     connect( m_renderer, SIGNAL( frameChanged(qint64, MainWorkflow::FrameChangedReason) ),
              this, SLOT( updateTimecode( qint64 ) ) );
+    connect( m_renderer, SIGNAL( stopped() ),
+             this, SLOT( clear() ) );
 }
 
 void PreviewRuler::paintEvent( QPaintEvent * event )
@@ -56,7 +60,7 @@ void PreviewRuler::paintEvent( QPaintEvent * event )
     Q_ASSERT( m_renderer );
 
     QPainter painter( this );
-    QRect marks( 0, 0, width() - 1, MARK_LARGE + 1 );
+    QRect marks( 0, 3, width() - 1, MARK_LARGE + 1 );
 
     painter.setPen( QPen( QColor( 50, 50, 50 ) ) );
     painter.setBrush( QBrush( QColor( 50, 50, 50 ) ) );
@@ -139,6 +143,32 @@ void PreviewRuler::paintEvent( QPaintEvent * event )
         }
     }
 
+    // Draw the markers (if any)
+    painter.setPen( QPen( Qt::green, 2 ) );
+
+    if ( m_markerStart > MARKER_DEFAULT )
+    {
+        int markerPos = m_markerStart * width() / m_renderer->getLength();
+        QPolygon marker( 4 );
+        marker.setPoints( 4,
+                          markerPos + 8,    1,
+                          markerPos,        1,
+                          markerPos,        20,
+                          markerPos + 8,    20 );
+        painter.drawPolyline( marker );
+    }
+    if ( m_markerStop > MARKER_DEFAULT )
+    {
+        int markerPos = m_markerStop * width() / m_renderer->getLength();
+        QPolygon marker( 4 );
+        marker.setPoints( 4,
+                          markerPos - 8,    1,
+                          markerPos,        1,
+                          markerPos,        20,
+                          markerPos - 8,    20 );
+        painter.drawPolyline( marker );
+    }
+
     // Draw the pointer
     painter.setRenderHint( QPainter::Antialiasing );
     painter.setPen( QPen( Qt::white ) );
@@ -216,3 +246,18 @@ void PreviewRuler::updateTimecode( qint64 frames /*= -1*/ )
         }
     }
 }
+
+void PreviewRuler::setMarker( Marker m )
+{
+    if ( m == START )
+        m_markerStart = m_frame;
+    else
+        m_markerStop = m_frame;
+}
+
+void PreviewRuler::clear()
+{
+    m_markerStart = MARKER_DEFAULT;
+    m_markerStop = MARKER_DEFAULT;
+    m_frame = 0;
+}
diff --git a/src/GUI/PreviewRuler.h b/src/GUI/PreviewRuler.h
index 6bfcfd7f..0c209564 100644
--- a/src/GUI/PreviewRuler.h
+++ b/src/GUI/PreviewRuler.h
@@ -34,13 +34,22 @@
 #define MARK_MEDIUM 8
 #define MARK_LARGE 11
 
+#define MARKER_DEFAULT -1
+
 class PreviewRuler : public QWidget
 {
     Q_OBJECT
 public:
+    enum Marker
+    {
+        START,
+        STOP
+    };
+
     PreviewRuler( QWidget* parent = 0 );
     virtual ~PreviewRuler() { }
     void setRenderer( GenericRenderer* renderer );
+    void setMarker( Marker m );
 
 public slots:
     void setFrame( qint64 frame, bool broadcastEvent = false );
@@ -53,10 +62,13 @@ protected:
 
 private slots:
     void updateTimecode( qint64 frames = -1 );
+    void clear();
 
 private:
     GenericRenderer*    m_renderer;
     qint64              m_frame;
+    qint64              m_markerStart;
+    qint64              m_markerStop;
     bool                m_isSliding;
 
 signals:
diff --git a/src/GUI/PreviewWidget.cpp b/src/GUI/PreviewWidget.cpp
index 5d9de147..1dbe8773 100644
--- a/src/GUI/PreviewWidget.cpp
+++ b/src/GUI/PreviewWidget.cpp
@@ -72,6 +72,9 @@ PreviewWidget::PreviewWidget( GenericRenderer* genericRenderer, QWidget *parent
     connect( m_renderer,     SIGNAL( endReached() ),            this,       SLOT( endReached() ) );
     connect( m_ui->rulerWidget, SIGNAL( frameChanged(qint64, MainWorkflow::FrameChangedReason) ),
              m_renderer,       SLOT( previewWidgetCursorChanged(qint64) ) );
+
+    connect( m_ui->pushButtonMarkerStart, SIGNAL( clicked() ), this, SLOT( markerStartClicked() ) );
+    connect( m_ui->pushButtonMarkerStop, SIGNAL( clicked() ), this, SLOT( markerStopClicked() ) );
 }
 
 PreviewWidget::~PreviewWidget()
@@ -163,3 +166,13 @@ void                        PreviewWidget::stop()
     //Ugly but avoid code dupplication.
     on_pushButtonStop_clicked();
 }
+
+void                        PreviewWidget::markerStartClicked()
+{
+    m_ui->rulerWidget->setMarker( PreviewRuler::START );
+}
+
+void                        PreviewWidget::markerStopClicked()
+{
+    m_ui->rulerWidget->setMarker( PreviewRuler::STOP );
+}
diff --git a/src/GUI/PreviewWidget.h b/src/GUI/PreviewWidget.h
index 4c1944e3..3bd97b4b 100644
--- a/src/GUI/PreviewWidget.h
+++ b/src/GUI/PreviewWidget.h
@@ -66,6 +66,8 @@ private slots:
     void            videoPlaying();
     void            videoStopped();
     void            endReached();
+    void            markerStartClicked();
+    void            markerStopClicked();
 };
 
 #endif // PREVIEWWIDGET_H
-- 
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