Merge pull request #2580 from nirvn/projection_selector_dbl_click_v5

[projection selector] apply selected projection on double click

python/gui/qgsprojectionselector.sip

@@ -105,4 +105,7 @@ class QgsProjectionSelector : QWidget
     //! Notify others that the widget is now fully initialized, including deferred selection of projection
     //! @note added in 2.4
     void initialized();
+    //! Apply projection on double click
+    //! @note added in 2.14
+    void projectionDoubleClicked();
 };

src/gui/qgsgenericprojectionselector.cpp

@@ -36,6 +36,9 @@ QgsGenericProjectionSelector::QgsGenericProjectionSelector( QWidget *parent,
 
   //we will show this only when a message is set
   textEdit->hide();
+
+  //apply selected projection upon double click on item
+  connect( projectionSelector, SIGNAL( projectionDoubleClicked() ), this, SLOT( accept() ) );
 }
 
 void QgsGenericProjectionSelector::setMessage( QString theMessage )

src/gui/qgsprojectionselector.cpp

@@ -18,6 +18,7 @@
 #include "qgsapplication.h"
 #include "qgslogger.h"
 #include "qgscoordinatereferencesystem.h"
+#include "qgsmessagelog.h"
 
 //qt includes
 #include <QFileInfo>
@@ -718,6 +719,24 @@ void QgsProjectionSelector::on_lstCoordinateSystems_currentItemChanged( QTreeWid
   }
 }
 
+void QgsProjectionSelector::on_lstCoordinateSystems_itemDoubleClicked( QTreeWidgetItem *current, int column )
+{
+  Q_UNUSED( column );
+
+  QgsDebugMsg( "Entered." );
+
+  if ( !current )
+  {
+    QgsDebugMsg( "no current item" );
+    return;
+  }
+
+  // If the item has children, it's not an end node in the tree, and
+  // hence is just a grouping thingy, not an actual CRS.
+  if ( current->childCount() == 0 )
+    emit projectionDoubleClicked();
+}
+
 void QgsProjectionSelector::on_lstRecent_currentItemChanged( QTreeWidgetItem *current, QTreeWidgetItem * )
 {
   QgsDebugMsg( "Entered." );
@@ -735,6 +754,23 @@ void QgsProjectionSelector::on_lstRecent_currentItemChanged( QTreeWidgetItem *cu
     lstCoordinateSystems->setCurrentItem( nodes.first() );
 }
 
+void QgsProjectionSelector::on_lstRecent_itemDoubleClicked( QTreeWidgetItem *current, int column )
+{
+  Q_UNUSED( column );
+
+  QgsDebugMsg( "Entered." );
+
+  if ( !current )
+  {
+    QgsDebugMsg( "no current item" );
+    return;
+  }
+
+  QList<QTreeWidgetItem*> nodes = lstCoordinateSystems->findItems( current->text( QGIS_CRS_ID_COLUMN ), Qt::MatchExactly | Qt::MatchRecursive, QGIS_CRS_ID_COLUMN );
+  if ( !nodes.isEmpty() )
+    emit projectionDoubleClicked();
+}
+
 void QgsProjectionSelector::hideDeprecated( QTreeWidgetItem *item )
 {
   if ( item->data( 0, Qt::UserRole ).toBool() )

src/gui/qgsprojectionselector.h

@@ -192,9 +192,13 @@ class GUI_EXPORT QgsProjectionSelector : public QWidget, private Ui::QgsProjecti
     //! Most recently used projections (trimmed at 25 entries)
     QStringList mRecentProjections;
 
-    //! hide deprecated CRSes
+    //! Hide deprecated CRSes
     void hideDeprecated( QTreeWidgetItem *item );
 
+    //! Apply projection on double click
+    void on_lstCoordinateSystems_itemDoubleClicked( QTreeWidgetItem *current, int column );
+    void on_lstRecent_itemDoubleClicked( QTreeWidgetItem *current, int column );
+
   private slots:
     //! get list of authorities
     QStringList authorities();
@@ -208,6 +212,9 @@ class GUI_EXPORT QgsProjectionSelector : public QWidget, private Ui::QgsProjecti
     //! Notify others that the widget is now fully initialized, including deferred selection of projection
     //! @note added in 2.4
     void initialized();
+    //! Apply projection on double click
+    //! @note added in 2.14
+    void projectionDoubleClicked();
 };
 
 #endif