Reload merge data (#252,#241)

* Added reloadSource() method to Merge class.
* Added reload button to MergeView

backends/merge/Merge.cpp

@@ -77,6 +77,41 @@ namespace glabels
 		}
 
 
+		///
+		/// Reload source
+		///
+		void Merge::reloadSource()
+		{
+			//  temporary map of original selections
+			QMap<QString,bool> origSelectionMap;
+
+			for ( auto& record : mRecordList )
+			{
+				origSelectionMap[ record[ primaryKey() ] ] = record.isSelected();
+			}
+
+			// Clear the original records
+			mRecordList.clear();
+
+			// Read the new records, preserve any original selections
+			open();
+			for ( Record record = readNextRecord(); !record.isEmpty(); record = readNextRecord() )
+			{
+				auto key = record[ primaryKey() ];
+				auto it = origSelectionMap.find( key );
+				if ( it != origSelectionMap.end() )
+				{
+					record.setSelected( it.value() );
+				}
+
+				mRecordList.push_back( record );
+			}
+			close();
+
+			emit sourceChanged();
+		}
+
+
 		///
 		/// Get record list
 		///

backends/merge/Merge.h

@@ -70,6 +70,7 @@ namespace glabels
 			QString id() const;
 			QString source() const;
 			void setSource( const QString& source );
+			void reloadSource();
 
 			const QList<Record>& recordList( ) const;
 

glabels/MergeView.cpp

@@ -203,6 +203,15 @@ namespace glabels
 	}
 
 
+	///
+	/// Reload button clicked handler
+	///
+	void MergeView::onReloadButtonClicked()
+	{
+		mModel->merge()->reloadSource();
+	}
+
+
 	///
 	/// Cell changed handler
 	///

glabels/MergeView.h

@@ -70,6 +70,7 @@ namespace glabels
 		void onLocationBrowseButtonClicked();
 		void onSelectAllButtonClicked();
 		void onUnselectAllButtonClicked();
+		void onReloadButtonClicked();
 		void onCellChanged( int iRow, int iCol );
 
 

glabels/ui/MergeView.ui

@@ -131,6 +131,13 @@
             </property>
            </spacer>
           </item>
+          <item>
+           <widget class="QPushButton" name="pushButton">
+            <property name="text">
+             <string>Reload</string>
+            </property>
+           </widget>
+          </item>
          </layout>
         </item>
        </layout>
@@ -197,8 +204,8 @@
    <slot>onLocationBrowseButtonClicked()</slot>
    <hints>
     <hint type="sourcelabel">
-     <x>296</x>
-     <y>130</y>
+     <x>534</x>
+     <y>165</y>
     </hint>
     <hint type="destinationlabel">
      <x>565</x>
@@ -206,11 +213,28 @@
     </hint>
    </hints>
   </connection>
+  <connection>
+   <sender>pushButton</sender>
+   <signal>clicked()</signal>
+   <receiver>MergeView</receiver>
+   <slot>onReloadButtonClicked()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>510</x>
+     <y>552</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>539</x>
+     <y>602</y>
+    </hint>
+   </hints>
+  </connection>
  </connections>
  <slots>
   <slot>onSelectAllButtonClicked()</slot>
   <slot>onUnselectAllButtonClicked()</slot>
   <slot>onFormatComboActivated()</slot>
   <slot>onLocationBrowseButtonClicked()</slot>
+  <slot>onReloadButtonClicked()</slot>
  </slots>
 </ui>

translations/glabels_C.ts

@@ -301,6 +301,10 @@
         <source>Browse...</source>
         <translation type="unfinished"></translation>
     </message>
+    <message>
+        <source>Reload</source>
+        <translation type="unfinished"></translation>
+    </message>
 </context>
 <context>
     <name>ObjectEditor</name>