Small fixes to QgsProjectionSelectionWidget

Add API docs, const correctness, method for getting CRS, tab order
fixes.

Author: nyalldawson

python/gui/qgsprojectionselectionwidget.sip

@@ -1,17 +1,38 @@
-
+/**
+ * \class QgsProjectionSelectionWidget
+ * \ingroup gui
+ * \brief A widget for selecting a projection.
+ * \note added in QGIS 2.7
+ */
 class QgsProjectionSelectionWidget : QWidget
 {
 %TypeHeaderCode
 #include <qgsprojectionselectionwidget.h>
 %End
 
   public:
+
     explicit QgsProjectionSelectionWidget( QWidget *parent /TransferThis/ = 0 );
 
+    /* Returns the currently selected CRS for the widget
+     * @returns current CRS
+     */
+    QgsCoordinateReferenceSystem crs() const;
+
   signals:
+
+    /* Emitted when the selected CRS is changed
+     */
     void crsChanged( QgsCoordinateReferenceSystem );
 
   public slots:
+
+    /* Sets the current CRS for the widget
+     * @param crs new CRS
+     */
     void setCrs( QgsCoordinateReferenceSystem crs );
+
+    /* Opens the dialog for selecting a new CRS
+     */
     void selectCrs();
 };

src/gui/qgsprojectionselectionwidget.cpp

@@ -23,20 +23,22 @@
 QgsProjectionSelectionWidget::QgsProjectionSelectionWidget( QWidget *parent ) :
     QWidget( parent )
 {
-
   QHBoxLayout* layout = new QHBoxLayout();
   layout->setContentsMargins( 0, 0, 0, 0 );
   layout->setSpacing( 0 );
   setLayout( layout );
 
   mCrsLineEdit = new QLineEdit( tr( "invalid projection" ), this );
-  mCrsLineEdit->setReadOnly(true);
+  mCrsLineEdit->setReadOnly( true );
   layout->addWidget( mCrsLineEdit );
 
   mButton = new QToolButton( this );
   mButton->setIcon( QgsApplication::getThemeIcon( "mActionSetProjection.svg" ) );
   layout->addWidget( mButton );
 
+  setFocusPolicy( Qt::StrongFocus );
+  setFocusProxy( mButton );
+
   connect( mButton, SIGNAL( clicked() ), this, SLOT( selectCrs() ) );
 }
 
@@ -64,7 +66,7 @@ void QgsProjectionSelectionWidget::selectCrs()
 }
 
 
-void QgsProjectionSelectionWidget::setCrs( QgsCoordinateReferenceSystem crs )
+void QgsProjectionSelectionWidget::setCrs( const QgsCoordinateReferenceSystem& crs )
 {
   if ( crs.isValid() )
   {

src/gui/qgsprojectionselectionwidget.h

@@ -23,17 +23,38 @@
 
 #include "qgscoordinatereferencesystem.h"
 
+/**
+ * \class QgsProjectionSelectionWidget
+ * \ingroup gui
+ * \brief A widget for selecting a projection.
+ * \note added in QGIS 2.7
+ */
 class GUI_EXPORT QgsProjectionSelectionWidget : public QWidget
 {
     Q_OBJECT
   public:
     explicit QgsProjectionSelectionWidget( QWidget *parent = 0 );
 
+    /* Returns the currently selected CRS for the widget
+     * @returns current CRS
+     */
+    QgsCoordinateReferenceSystem crs() const { return mCrs; }
+
   signals:
+
+    /* Emitted when the selected CRS is changed
+     */
     void crsChanged( QgsCoordinateReferenceSystem );
 
   public slots:
-    void setCrs( QgsCoordinateReferenceSystem crs );
+
+    /* Sets the current CRS for the widget
+     * @param crs new CRS
+     */
+    void setCrs( const QgsCoordinateReferenceSystem& crs );
+
+    /* Opens the dialog for selecting a new CRS
+     */
     void selectCrs();
 
   private: