Add a selectOnFocus property to QgsFilterLineEdit

python/gui/qgsfilterlineedit.sip

@@ -177,6 +177,21 @@ class QgsFilterLineEdit : QLineEdit
  Show a spinner icon. This can be used for search boxes to indicate that
  something is going on in the background.
 
+.. versionadded:: 3.0
+%End
+
+    bool selectOnFocus() const;
+%Docstring
+ Will select all text when this widget receives the focus.
+
+.. versionadded:: 3.0
+ :rtype: bool
+%End
+
+    void setSelectOnFocus( bool selectOnFocus );
+%Docstring
+ Will select all text when this widget receives the focus.
+
 .. versionadded:: 3.0
 %End
 
@@ -209,6 +224,14 @@ class QgsFilterLineEdit : QLineEdit
  Show a spinner icon. This can be used for search boxes to indicate that
  something is going on in the background.
 
+.. versionadded:: 3.0
+%End
+
+
+    void selectOnFocusChanged();
+%Docstring
+ Will select all text when this widget receives the focus.
+
 .. versionadded:: 3.0
 %End
 

src/gui/qgsfilterlineedit.cpp

@@ -102,7 +102,7 @@ void QgsFilterLineEdit::mouseMoveEvent( QMouseEvent *e )
 void QgsFilterLineEdit::focusInEvent( QFocusEvent *e )
 {
   QLineEdit::focusInEvent( e );
-  if ( e->reason() == Qt::MouseFocusReason && isNull() )
+  if ( e->reason() == Qt::MouseFocusReason && ( isNull() || mSelectOnFocus ) )
   {
     mFocusInEvent = true;
     selectAll();
@@ -197,6 +197,20 @@ void QgsFilterLineEdit::updateBusySpinner()
   update();
 }
 
+bool QgsFilterLineEdit::selectOnFocus() const
+{
+  return mSelectOnFocus;
+}
+
+void QgsFilterLineEdit::setSelectOnFocus( bool selectOnFocus )
+{
+  if ( mSelectOnFocus == selectOnFocus )
+    return;
+
+  mSelectOnFocus = selectOnFocus;
+  emit selectOnFocusChanged();
+}
+
 bool QgsFilterLineEdit::showSpinner() const
 {
   return mShowSpinner;

src/gui/qgsfilterlineedit.h

@@ -199,6 +199,20 @@ class GUI_EXPORT QgsFilterLineEdit : public QLineEdit
      */
     void setShowSpinner( bool showSpinner );
 
+    /**
+     * Will select all text when this widget receives the focus.
+     *
+     * \since QGIS 3.0
+     */
+    bool selectOnFocus() const;
+
+    /**
+     * Will select all text when this widget receives the focus.
+     *
+     * \since QGIS 3.0
+     */
+    void setSelectOnFocus( bool selectOnFocus );
+
   public slots:
 
     /**
@@ -231,6 +245,14 @@ class GUI_EXPORT QgsFilterLineEdit : public QLineEdit
      */
     void showSpinnerChanged();
 
+
+    /**
+     * Will select all text when this widget receives the focus.
+     *
+     * \since QGIS 3.0
+     */
+    void selectOnFocusChanged();
+
   protected:
     void mousePressEvent( QMouseEvent *e ) override;
     void mouseMoveEvent( QMouseEvent *e ) override;
@@ -255,6 +277,7 @@ class GUI_EXPORT QgsFilterLineEdit : public QLineEdit
     QString mStyleSheet;
     bool mFocusInEvent = false;
     bool mClearHover = false;
+    bool mSelectOnFocus = false;
 
     QSize mClearIconSize;
     QPixmap mClearIconPixmap;