Improvements for merge tool. Show a progress dialog during the merge and make the item showing the attribute values after the merge editable

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@10943 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: mhugent

src/app/qgisapp.cpp

@@ -53,6 +53,7 @@
 #include <QPrinter>
 #include <QProcess>
 #include <QProgressBar>
+#include <QProgressDialog>
 #include <QRegExp>
 #include <QRegExpValidator>
 #include <QSettings>
@@ -4139,7 +4140,7 @@ void QgisApp::deletePart()
   mMapCanvas->setMapTool( mMapTools.mDeletePart );
 }
 
-QgsGeometry* QgisApp::unionGeometries(const QgsVectorLayer* vl, QgsFeatureList& featureList) const
+QgsGeometry* QgisApp::unionGeometries(const QgsVectorLayer* vl, QgsFeatureList& featureList)
 {
   if(!vl || featureList.size() < 2)
   {
@@ -4153,8 +4154,20 @@ QgsGeometry* QgisApp::unionGeometries(const QgsVectorLayer* vl, QgsFeatureList&
     return 0;
   }
 
+  QProgressDialog progress(tr("Merging features..."), tr("Abort"), 0, featureList.size(), this);
+  progress.setWindowModality(Qt::WindowModal);
+
+  QApplication::setOverrideCursor( Qt::WaitCursor );
+
   for(int i = 1; i < featureList.size(); ++i)
   {
+    if(progress.wasCanceled())
+    {
+      delete unionGeom;
+      QApplication::restoreOverrideCursor();
+      return 0;
+    }
+    progress.setValue(i);
     QgsGeometry* currentGeom = featureList[i].geometry();
     if(currentGeom)
     {
@@ -4167,6 +4180,9 @@ QgsGeometry* QgisApp::unionGeometries(const QgsVectorLayer* vl, QgsFeatureList&
       }
     }
   }
+
+  QApplication::restoreOverrideCursor();
+  progress.setValue(featureList.size());
   return unionGeom;
 }
 

src/app/qgisapp.h

@@ -667,7 +667,7 @@ class QgisApp : public QMainWindow
     bool saveDirty();
     /** Helper function to union several geometries together (used in function mergeSelectedFeatures)
       @return 0 in case of error*/
-    QgsGeometry* unionGeometries(const QgsVectorLayer* vl, QgsFeatureList& featureList) const;
+    QgsGeometry* unionGeometries(const QgsVectorLayer* vl, QgsFeatureList& featureList);
 
     /// QgisApp aren't copyable
     QgisApp( QgisApp const & );

src/app/qgsmergeattributesdialog.cpp

@@ -248,7 +248,7 @@ void QgsMergeAttributesDialog::refreshMergedValue(int col)
 
     //insert string into table widget
    QTableWidgetItem* newTotalItem = new QTableWidgetItem(evalText);
-   newTotalItem->setFlags(Qt::ItemIsEnabled | Qt::ItemIsSelectable);
+   newTotalItem->setFlags(Qt::ItemIsEnabled | Qt::ItemIsSelectable | Qt::ItemIsEditable);
    mTableWidget->setItem(mTableWidget->rowCount() - 1, col, newTotalItem);
 }