Fix style dock button not synced to dock state (fix #14862)

Add a new class QgsDockWidget which has finer control over setting
and retrieving the dock visibility, to account for dock widgets
which are open but hidden by other docks

python/gui/gui.sip

@@ -63,6 +63,7 @@
 %Include qgsdetaileditemwidget.sip
 %Include qgsdial.sip
 %Include qgsdialog.sip
+%Include qgsdockwidget.sip
 %Include qgsencodingfiledialog.sip
 %Include qgserrordialog.sip
 %Include qgsexpressionbuilderdialog.sip

python/gui/qgsdockwidget.sip

@@ -0,0 +1,61 @@
+/** \ingroup gui
+ * \class QgsDockWidget
+ * QDockWidget subclass with more fine-grained control over how the widget is closed or opened.
+ * \note added in 2.16
+ */
+
+class QgsDockWidget : QDockWidget
+{
+%TypeHeaderCode
+#include <qgsdockwidget.h>
+%End
+
+  public:
+
+    /** Constructor for QgsDockWidget.
+     * @param parent parent widget
+     */
+    explicit QgsDockWidget( QWidget* parent /TransferThis/ = nullptr );
+
+  public slots:
+
+    /** Sets the dock widget as visible to a user, ie both shown and raised to the front.
+     * @param visible set to true to show the dock to the user, or false to hide the dock.
+     * When setting a dock as user visible, the dock will be opened (if it is not already
+     * opened) and raised to the front.
+     * When setting as hidden, the following logic is used:
+     * - hiding a dock which is open but not raised (ie hidden by another tab) will have no
+     * effect, and the dock will still be opened and hidden by the other tab
+     * - hiding a dock which is open and raised (ie, user visible) will cause the dock to
+     * be closed
+     * - hiding a dock which is closed has no effect and raises no signals
+     * @see isUserVisible()
+     */
+    void setUserVisible( bool visible );
+
+    /** Returns true if the dock is both opened and raised to the front (ie not hidden by
+     * any other tabs.
+     * @see setUserVisible()
+     */
+    bool isUserVisible() const;
+
+  protected:
+
+    virtual void closeEvent( QCloseEvent * );
+    virtual void showEvent( QShowEvent* event );
+
+  signals:
+
+    /** Emitted when dock widget is closed (or opened).
+     * @param wasClosed will be true if dock widget was closed, or false if dock widget was opened
+     * @see opened()
+     */
+    void closed( bool wasClosed );
+
+    /** Emitted when dock widget is opened (or closed).
+     * @param wasOpened will be true if dock widget was opened, or false if dock widget was closed
+     * @see closed()
+     */
+    void opened( bool wasOpened );
+
+};

src/app/qgisapp.cpp

@@ -135,6 +135,7 @@
 #include "qgsdatasourceuri.h"
 #include "qgsdatumtransformdialog.h"
 #include "qgsdoublespinbox.h"
+#include "qgsdockwidget.h"
 #include "qgsdxfexport.h"
 #include "qgsdxfexportdialog.h"
 #include "qgsdecorationcopyright.h"
@@ -769,13 +770,13 @@ QgisApp::QgisApp( QSplashScreen *splash, bool restorePlugins, bool skipVersionCh
   mUndoDock->hide();
 
   startProfile( "Map Style dock" );
-  mMapStylingDock = new QDockWidget( this );
+  mMapStylingDock = new QgsDockWidget( this );
   mMapStylingDock->setWindowTitle( tr( "Map Styling" ) );
   mMapStylingDock->setObjectName( "MapStyling" );
   mMapStyleWidget = new QgsMapStylingWidget( mMapCanvas, mMapStylePanelFactories );
   mMapStylingDock->setWidget( mMapStyleWidget );
   connect( mMapStyleWidget, SIGNAL( styleChanged( QgsMapLayer* ) ), this, SLOT( updateLabelToolButtons() ) );
-//  connect( mMapStylingDock, SIGNAL( visibilityChanged( bool ) ), mActionStyleDock, SLOT( setChecked( bool ) ) );
+  connect( mMapStylingDock, SIGNAL( visibilityChanged( bool ) ), mActionStyleDock, SLOT( setChecked( bool ) ) );
 
   addDockWidget( Qt::RightDockWidgetArea, mMapStylingDock );
   mMapStylingDock->hide();
@@ -5800,7 +5801,7 @@ void QgisApp::setMapStyleDockLayer( QgsMapLayer* layer )
 
 void QgisApp::mapStyleDock( bool enabled )
 {
-  mMapStylingDock->setVisible( enabled );
+  mMapStylingDock->setUserVisible( enabled );
   setMapStyleDockLayer( activeLayer() );
 }
 

src/app/qgisapp.h

@@ -49,6 +49,7 @@ class QgsStatusBarMagnifierWidget;
 class QgsStatusBarScaleWidget;
 class QgsContrastEnhancement;
 class QgsCustomLayerOrderWidget;
+class QgsDockWidget;
 class QgsDoubleSpinBox;
 class QgsFeature;
 class QgsGeometry;
@@ -1730,7 +1731,7 @@ class APP_EXPORT QgisApp : public QMainWindow, private Ui::MainWindow
     QgsSnappingDialog *mSnappingDialog;
 
     QgsPluginManager *mPluginManager;
-    QDockWidget *mMapStylingDock;
+    QgsDockWidget *mMapStylingDock;
     QgsMapStylingWidget* mMapStyleWidget;
 
     QgsComposerManager *mComposerManager;

src/gui/CMakeLists.txt

@@ -204,6 +204,7 @@ SET(QGIS_GUI_SRCS
   qgsdetaileditemwidget.cpp
   qgsdial.cpp
   qgsdialog.cpp
+  qgsdockwidget.cpp
   qgsencodingfiledialog.cpp
   qgserrordialog.cpp
   qgsexpressionbuilderdialog.cpp
@@ -360,6 +361,7 @@ SET(QGIS_GUI_MOC_HDRS
   qgsdetaileditemwidget.h
   qgsdial.h
   qgsdialog.h
+  qgsdockwidget.h
   qgsencodingfiledialog.h
   qgserrordialog.h
   qgsexpressionbuilderdialog.h

src/gui/qgsdockwidget.cpp

@@ -0,0 +1,71 @@
+/***************************************************************************
+                             qgsdockwidget.cpp
+                             -----------------
+    begin                : June 2016
+    copyright            : (C) 2016 by Nyall Dawson
+    email                : nyall dot dawson at gmail dot com
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+
+#include "qgsdockwidget.h"
+
+
+QgsDockWidget::QgsDockWidget( QWidget* parent )
+    : QDockWidget( parent )
+    , mVisibleAndActive( false )
+{
+  connect( this, SIGNAL( visibilityChanged( bool ) ), this, SLOT( handleVisibilityChanged( bool ) ) );
+}
+
+void QgsDockWidget::setUserVisible( bool visible )
+{
+  if ( visible )
+  {
+    if ( mVisibleAndActive )
+      return;
+
+    show();
+    raise();
+  }
+  else
+  {
+    if ( !mVisibleAndActive )
+      return;
+
+    hide();
+  }
+}
+
+bool QgsDockWidget::isUserVisible() const
+{
+  return mVisibleAndActive;
+}
+
+void QgsDockWidget::closeEvent( QCloseEvent* e )
+{
+  emit closed( true );
+  emit opened( false );
+  QDockWidget::closeEvent( e );
+}
+
+void QgsDockWidget::showEvent( QShowEvent* e )
+{
+  emit closed( false );
+  emit opened( true );
+  QDockWidget::showEvent( e );
+}
+
+void QgsDockWidget::handleVisibilityChanged( bool visible )
+{
+  mVisibleAndActive = visible;
+}
+

src/gui/qgsdockwidget.h

@@ -0,0 +1,86 @@
+/***************************************************************************
+                             qgsdockwidget.h
+                             ---------------
+    begin                : June 2016
+    copyright            : (C) 2016 by Nyall Dawson
+    email                : nyall dot dawson at gmail dot com
+ ***************************************************************************/
+
+/***************************************************************************
+ *                                                                         *
+ *   This program is free software; you can redistribute it and/or modify  *
+ *   it under the terms of the GNU General Public License as published by  *
+ *   the Free Software Foundation; either version 2 of the License, or     *
+ *   (at your option) any later version.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#include <QDockWidget>
+
+/** \ingroup gui
+ * \class QgsDockWidget
+ * QDockWidget subclass with more fine-grained control over how the widget is closed or opened.
+ * \note added in 2.16
+ */
+
+class GUI_EXPORT QgsDockWidget : public QDockWidget
+{
+    Q_OBJECT
+
+  public:
+
+    /** Constructor for QgsDockWidget.
+     * @param parent parent widget
+     */
+    explicit QgsDockWidget( QWidget* parent = nullptr );
+
+  public slots:
+
+    /** Sets the dock widget as visible to a user, ie both shown and raised to the front.
+     * @param visible set to true to show the dock to the user, or false to hide the dock.
+     * When setting a dock as user visible, the dock will be opened (if it is not already
+     * opened) and raised to the front.
+     * When setting as hidden, the following logic is used:
+     * - hiding a dock which is open but not raised (ie hidden by another tab) will have no
+     * effect, and the dock will still be opened and hidden by the other tab
+     * - hiding a dock which is open and raised (ie, user visible) will cause the dock to
+     * be closed
+     * - hiding a dock which is closed has no effect and raises no signals
+     * @see isUserVisible()
+     */
+    void setUserVisible( bool visible );
+
+    /** Returns true if the dock is both opened and raised to the front (ie not hidden by
+     * any other tabs.
+     * @see setUserVisible()
+     */
+    bool isUserVisible() const;
+
+  protected:
+
+    virtual void closeEvent( QCloseEvent * ) override;
+    virtual void showEvent( QShowEvent* event ) override;
+
+  signals:
+
+    /** Emitted when dock widget is closed (or opened).
+     * @param wasClosed will be true if dock widget was closed, or false if dock widget was opened
+     * @see opened()
+     */
+    void closed( bool wasClosed );
+
+    /** Emitted when dock widget is opened (or closed).
+     * @param wasOpened will be true if dock widget was opened, or false if dock widget was closed
+     * @see closed()
+     */
+    void opened( bool wasOpened );
+
+  private slots:
+
+    void handleVisibilityChanged( bool visible );
+
+  private:
+
+    bool mVisibleAndActive;
+
+};

tests/src/gui/CMakeLists.txt

@@ -129,6 +129,7 @@ ADD_QGIS_TEST(zoomtest testqgsmaptoolzoom.cpp)
 ADD_QGIS_TEST(doublespinbox testqgsdoublespinbox.cpp)
 ADD_QGIS_TEST(dualviewtest testqgsdualview.cpp)
 ADD_QGIS_TEST(attributeformtest testqgsattributeform.cpp)
+ADD_QGIS_TEST(dockwidget testqgsdockwidget.cpp)
 ADD_QGIS_TEST(fieldexpressionwidget testqgsfieldexpressionwidget.cpp)
 ADD_QGIS_TEST(filewidget testqgsfilewidget.cpp)
 ADD_QGIS_TEST(focuswatcher testqgsfocuswatcher.cpp)