Allow changing label for multiple values at once in paletted renderer…

… widget
qgis · Apr 3, 2017 · 40027ab · 40027ab
1 parent 64084ae
commit 40027ab
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Showing 2 changed files with 30 additions and 0 deletions.
diff --git a/src/gui/raster/qgspalettedrendererwidget.cpp b/src/gui/raster/qgspalettedrendererwidget.cpp
@@ -32,6 +32,7 @@ QgsPalettedRendererWidget::QgsPalettedRendererWidget( QgsRasterLayer *layer, con
   contextMenu = new QMenu( tr( "Options" ), this );
   contextMenu->addAction( tr( "Change color" ), this, SLOT( changeColor() ) );
   contextMenu->addAction( tr( "Change transparency" ), this, SLOT( changeTransparency() ) );
+  contextMenu->addAction( tr( "Change label" ), this, SLOT( changeLabel() ) );
 
   mModel = new QgsPalettedRendererModel( this );
   mTreeView->setSortingEnabled( false );
@@ -202,6 +203,34 @@ void QgsPalettedRendererWidget::changeTransparency()
   }
 }
 
+void QgsPalettedRendererWidget::changeLabel()
+{
+  QItemSelection sel = mTreeView->selectionModel()->selection();
+
+  QModelIndex labelIndex = mModel->index( sel.first().top(), QgsPalettedRendererModel::LabelColumn );
+  QString currentLabel = mModel->data( labelIndex, Qt::DisplayRole ).toString();
+
+  bool ok;
+  QString newLabel = QInputDialog::getText( this, tr( "Label" ), tr( "Change label" ), QLineEdit::Normal, currentLabel, &ok );
+  if ( ok )
+  {
+    // don't want to emit widgetChanged multiple times
+    disconnect( mModel, &QgsPalettedRendererModel::classesChanged, this, &QgsPalettedRendererWidget::widgetChanged );
+
+    Q_FOREACH ( const QItemSelectionRange &range, sel )
+    {
+      Q_FOREACH ( const QModelIndex &index, range.indexes() )
+      {
+        labelIndex = mModel->index( index.row(), QgsPalettedRendererModel::LabelColumn );
+        mModel->setData( labelIndex, newLabel, Qt::EditRole );
+      }
+    }
+    connect( mModel, &QgsPalettedRendererModel::classesChanged, this, &QgsPalettedRendererWidget::widgetChanged );
+
+    emit widgetChanged();
+  }
+}
+
 //
 // QgsPalettedRendererModel
 //

diff --git a/src/gui/raster/qgspalettedrendererwidget.h b/src/gui/raster/qgspalettedrendererwidget.h
@@ -97,6 +97,7 @@ class GUI_EXPORT QgsPalettedRendererWidget: public QgsRasterRendererWidget, priv
     void addEntry();
     void changeColor();
     void changeTransparency();
+    void changeLabel();
 };
 
 #endif // QGSPALETTEDRENDERERWIDGET_H