Some visual tweaks to property assistant widget

Author: nyalldawson

src/gui/qgspropertyassistantwidget.cpp

@@ -164,7 +164,7 @@ void QgsPropertyAssistantWidget::updatePreview()
   mPreviewList.clear();
 
   QList<double> breaks = QgsSymbolLayerUtils::prettyBreaks( minValueSpinBox->value(),
-                         maxValueSpinBox->value(), 4 );
+                         maxValueSpinBox->value(), 8 );
 
   QList< QgsSymbolLegendNode* > nodes = mTransformerWidget->generatePreviews( breaks, mLayerTreeLayer, mSymbol.get(), minValueSpinBox->value(),
                                         maxValueSpinBox->value() );
@@ -181,7 +181,9 @@ void QgsPropertyAssistantWidget::updatePreview()
     const QSize minSize( node->minimumIconSize() );
     node->setIconSize( minSize );
     widthMax = qMax( minSize.width(), widthMax );
-    mPreviewList.appendRow( new QStandardItem( node->data( Qt::DecorationRole ).value<QPixmap>(), QString::number( breaks[i] ) ) );
+    QStandardItem* item = new QStandardItem( node->data( Qt::DecorationRole ).value<QPixmap>(), QString::number( breaks[i] ) );
+    item->setEditable( false );
+    mPreviewList.appendRow( item );
     delete node;
     i++;
   }

src/ui/qgspropertyassistantwidgetbase.ui

@@ -121,6 +121,14 @@
           <height>16777215</height>
          </size>
         </property>
+        <property name="toolTip">
+         <string>Fetch value range from layer</string>
+        </property>
+        <property name="icon">
+         <iconset>
+          <normalon>:/images/themes/default/mActionDraw.svg</normalon>
+         </iconset>
+        </property>
        </widget>
       </item>
       <item row="0" column="1" colspan="2">