Fix rule based settings not saved (fix #15146, #15147, #15148)

Author: nyalldawson

python/gui/qgsscalerangewidget.sip

@@ -37,4 +37,13 @@ class QgsScaleRangeWidget : QWidget
     void setMaximumScale( double scale );
 
     void setScaleRange( double min, double max );
+
+  signals:
+
+    /** Emitted when the scale range set in the widget is changed.
+     * @param min minimum scale
+     * @param max maximum scale
+     * @note added in QGIS 2.16
+     */
+    void rangeChanged( double min, double max );
 };

src/gui/qgsscalerangewidget.cpp

@@ -64,6 +64,9 @@ QgsScaleRangeWidget::QgsScaleRangeWidget( QWidget *parent )
   mLayout->setColumnStretch( 3, 0 );
   mLayout->setColumnStretch( 4, 0 );
   mLayout->setColumnStretch( 5, 3 );
+
+  connect( mMinimumScaleWidget, SIGNAL( scaleChanged( double ) ), this, SLOT( emitRangeChanged() ) );
+  connect( mMaximumScaleWidget, SIGNAL( scaleChanged( double ) ), this, SLOT( emitRangeChanged() ) );
 }
 
 QgsScaleRangeWidget::~QgsScaleRangeWidget()
@@ -123,3 +126,8 @@ void QgsScaleRangeWidget::setScaleRange( double min, double max )
   setMinimumScale( min );
 }
 
+void QgsScaleRangeWidget::emitRangeChanged()
+{
+  emit rangeChanged( minimumScale(), maximumScale() );
+}
+

src/gui/qgsscalerangewidget.h

@@ -62,6 +62,19 @@ class GUI_EXPORT QgsScaleRangeWidget : public QWidget
 
     void setScaleRange( double min, double max );
 
+  signals:
+
+    /** Emitted when the scale range set in the widget is changed.
+     * @param min minimum scale
+     * @param max maximum scale
+     * @note added in QGIS 2.16
+     */
+    void rangeChanged( double min, double max );
+
+  private slots:
+
+    void emitRangeChanged();
+
   private:
     //! pointer to the map canvas used for current buttons.
     QgsMapCanvas* mCanvas;

src/gui/symbology-ng/qgsrulebasedrendererv2widget.cpp

@@ -656,7 +656,11 @@ QgsRendererRulePropsWidget::QgsRendererRulePropsWidget( QgsRuleBasedRendererV2::
   connect( btnExpressionBuilder, SIGNAL( clicked() ), this, SLOT( buildExpression() ) );
   connect( btnTestFilter, SIGNAL( clicked() ), this, SLOT( testFilter() ) );
   connect( editFilter, SIGNAL( textChanged( QString ) ), this, SIGNAL( widgetChanged() ) );
-
+  connect( editLabel, SIGNAL( textChanged( QString ) ), this, SIGNAL( widgetChanged() ) );
+  connect( editDescription, SIGNAL( textChanged( QString ) ), this, SIGNAL( widgetChanged() ) );
+  connect( groupSymbol, SIGNAL( toggled( bool ) ), this, SIGNAL( widgetChanged() ) );
+  connect( groupScale, SIGNAL( toggled( bool ) ), this, SIGNAL( widgetChanged() ) );
+  connect( mScaleRangeWidget, SIGNAL( rangeChanged( double, double ) ), this, SIGNAL( widgetChanged() ) );
 }
 
 QgsRendererRulePropsWidget::~QgsRendererRulePropsWidget()