[FEATURE] Show recent colors in layer right click menus

python/core/qgscolorscheme.sip

@@ -194,6 +194,12 @@ class QgsRecentColorScheme : QgsColorScheme
                                            const QColor &baseColor = QColor() );
 
     virtual QgsRecentColorScheme* clone() const /Factory/;
+
+    /** Adds a color to the list of recent colors.
+     * @param color color to add
+     * @note added in QGIS 2.14
+     */
+    static void addRecentColor( const QColor& color );
 };
 
 /** \ingroup core

python/gui/qgscolorswatchgrid.sip

@@ -139,6 +139,23 @@ class QgsColorSwatchGridAction: QWidgetAction
      */
     void setContext( const QString &context );
 
+    /** Sets whether the parent menu should be dismissed and closed when a color is selected
+     * from the action's color widget.
+     * @param dismiss set to true (default) to immediately close the menu when a color is selected
+     * from the widget. If set to false, the colorChanged signal will be emitted but the menu will
+     * stay open.
+     * @see dismissOnColorSelection()
+     * @note added in QGIS 2.14
+     */
+    void setDismissOnColorSelection( bool dismiss );
+
+    /** Returns whether the parent menu will be dismissed after a color is selected from the
+     * action's color widget.
+     * @see setDismissOnColorSelection
+     * @note added in QGIS 2.14
+     */
+    bool dismissOnColorSelection() const;
+
   public slots:
 
     /** Reload colors from scheme and redraws the widget

src/app/qgsapplayertreeviewmenuprovider.cpp

@@ -142,6 +142,19 @@ QMenu* QgsAppLayerTreeViewMenuProvider::createContextMenu()
             //store the layer id in action, so we can later retrieve the corresponding layer
             colorAction->setProperty( "layerId", vlayer->id() );
             menuStyleManager->addAction( colorAction );
+
+            //add recent colors action
+            QList<QgsRecentColorScheme *> recentSchemes;
+            QgsColorSchemeRegistry::instance()->schemes( recentSchemes );
+            if ( !recentSchemes.isEmpty() )
+            {
+              QgsColorSwatchGridAction* recentColorAction = new QgsColorSwatchGridAction( recentSchemes.at( 0 ), menuStyleManager, "symbology", menuStyleManager );
+              recentColorAction->setProperty( "layerId", vlayer->id() );
+              recentColorAction->setDismissOnColorSelection( false );
+              menuStyleManager->addAction( recentColorAction );
+              connect( recentColorAction, SIGNAL( colorChanged( const QColor& ) ), this, SLOT( setVectorSymbolColor( const QColor& ) ) );
+            }
+
             menuStyleManager->addSeparator();
             QAction* editSymbolAction = new QAction( tr( "Edit Symbol..." ), menuStyleManager );
             //store the layer id in action, so we can later retrieve the corresponding layer
@@ -260,6 +273,20 @@ QMenu* QgsAppLayerTreeViewMenuProvider::createContextMenu()
           colorAction->setProperty( "layerId", symbolNode->layerNode()->layerId() );
           colorAction->setProperty( "ruleKey", symbolNode->data( QgsLayerTreeModelLegendNode::RuleKeyRole ).toString() );
           menu->addAction( colorAction );
+
+          //add recent colors action
+          QList<QgsRecentColorScheme *> recentSchemes;
+          QgsColorSchemeRegistry::instance()->schemes( recentSchemes );
+          if ( !recentSchemes.isEmpty() )
+          {
+            QgsColorSwatchGridAction* recentColorAction = new QgsColorSwatchGridAction( recentSchemes.at( 0 ), menu, "symbology", menu );
+            recentColorAction->setProperty( "layerId", symbolNode->layerNode()->layerId() );
+            recentColorAction->setProperty( "ruleKey", symbolNode->data( QgsLayerTreeModelLegendNode::RuleKeyRole ).toString() );
+            recentColorAction->setDismissOnColorSelection( false );
+            menu->addAction( recentColorAction );
+            connect( recentColorAction, SIGNAL( colorChanged( const QColor& ) ), this, SLOT( setSymbolLegendNodeColor( const QColor& ) ) );
+          }
+
           menu->addSeparator();
         }
 

src/core/qgscolorscheme.cpp

@@ -81,6 +81,42 @@ QgsRecentColorScheme* QgsRecentColorScheme::clone() const
   return new QgsRecentColorScheme();
 }
 
+void QgsRecentColorScheme::addRecentColor( const QColor& color )
+{
+  if ( !color.isValid() )
+  {
+    return;
+  }
+
+  //strip alpha from color
+  QColor opaqueColor = color;
+  opaqueColor.setAlpha( 255 );
+
+  QSettings settings;
+  QList< QVariant > recentColorVariants = settings.value( QString( "/colors/recent" ) ).toList();
+
+  //remove colors by name
+  for ( int colorIdx = recentColorVariants.length() - 1; colorIdx >= 0; --colorIdx )
+  {
+    if (( recentColorVariants.at( colorIdx ).value<QColor>() ).name() == opaqueColor.name() )
+    {
+      recentColorVariants.removeAt( colorIdx );
+    }
+  }
+
+  //add color
+  QVariant colorVariant = QVariant( opaqueColor );
+  recentColorVariants.prepend( colorVariant );
+
+  //trim to 20 colors
+  while ( recentColorVariants.count() > 20 )
+  {
+    recentColorVariants.pop_back();
+  }
+
+  settings.setValue( QString( "/colors/recent" ), recentColorVariants );
+}
+
 
 QgsCustomColorScheme::QgsCustomColorScheme() : QgsColorScheme()
 {

src/core/qgscolorscheme.h

@@ -192,6 +192,12 @@ class CORE_EXPORT QgsRecentColorScheme : public QgsColorScheme
                                            const QColor &baseColor = QColor() ) override;
 
     QgsRecentColorScheme* clone() const override;
+
+    /** Adds a color to the list of recent colors.
+     * @param color color to add
+     * @note added in QGIS 2.14
+     */
+    static void addRecentColor( const QColor& color );
 };
 
 /** \ingroup core

src/gui/qgscolorbuttonv2.cpp

@@ -513,38 +513,7 @@ void QgsColorButtonV2::setColor( const QColor &color )
 
 void QgsColorButtonV2::addRecentColor( const QColor& color )
 {
-  if ( !color.isValid() )
-  {
-    return;
-  }
-
-  //strip alpha from color
-  QColor opaqueColor = color;
-  opaqueColor.setAlpha( 255 );
-
-  QSettings settings;
-  QList< QVariant > recentColorVariants = settings.value( QString( "/colors/recent" ) ).toList();
-
-  //remove colors by name
-  for ( int colorIdx = recentColorVariants.length() - 1; colorIdx >= 0; --colorIdx )
-  {
-    if (( recentColorVariants.at( colorIdx ).value<QColor>() ).name() == opaqueColor.name() )
-    {
-      recentColorVariants.removeAt( colorIdx );
-    }
-  }
-
-  //add color
-  QVariant colorVariant = QVariant( opaqueColor );
-  recentColorVariants.prepend( colorVariant );
-
-  //trim to 20 colors
-  while ( recentColorVariants.count() > 20 )
-  {
-    recentColorVariants.pop_back();
-  }
-
-  settings.setValue( QString( "/colors/recent" ), recentColorVariants );
+  QgsRecentColorScheme::addRecentColor( color );
 }
 
 void QgsColorButtonV2::setButtonBackground( const QColor &color )

src/gui/qgscolorswatchgrid.cpp

@@ -362,6 +362,7 @@ QgsColorSwatchGridAction::QgsColorSwatchGridAction( QgsColorScheme* scheme, QMen
     : QWidgetAction( parent )
     , mMenu( menu )
     , mSuppressRecurse( false )
+    , mDismissOnColorSelection( true )
 {
   mColorSwatchGrid = new QgsColorSwatchGrid( scheme, context, parent );
 
@@ -411,7 +412,7 @@ void QgsColorSwatchGridAction::setColor( const QColor &color )
 {
   emit colorChanged( color );
   QAction::trigger();
-  if ( mMenu )
+  if ( mMenu && mDismissOnColorSelection )
   {
     mMenu->hide();
   }

src/gui/qgscolorswatchgrid.h

@@ -195,6 +195,23 @@ class GUI_EXPORT QgsColorSwatchGridAction: public QWidgetAction
      */
     void setContext( const QString &context );
 
+    /** Sets whether the parent menu should be dismissed and closed when a color is selected
+     * from the action's color widget.
+     * @param dismiss set to true (default) to immediately close the menu when a color is selected
+     * from the widget. If set to false, the colorChanged signal will be emitted but the menu will
+     * stay open.
+     * @see dismissOnColorSelection()
+     * @note added in QGIS 2.14
+     */
+    void setDismissOnColorSelection( bool dismiss ) { mDismissOnColorSelection = dismiss; }
+
+    /** Returns whether the parent menu will be dismissed after a color is selected from the
+     * action's color widget.
+     * @see setDismissOnColorSelection
+     * @note added in QGIS 2.14
+     */
+    bool dismissOnColorSelection() const { return mDismissOnColorSelection; }
+
   public slots:
 
     /** Reload colors from scheme and redraws the widget
@@ -214,6 +231,7 @@ class GUI_EXPORT QgsColorSwatchGridAction: public QWidgetAction
 
     //used to supress recursion with hover events
     bool mSuppressRecurse;
+    bool mDismissOnColorSelection;
 
   private slots: