Move handling of layout manager from qgisapp -> QgsAppWindowManager

Author: nyalldawson

src/app/qgisapp.cpp

@@ -210,7 +210,6 @@ Q_GUI_EXPORT extern int qt_defaultDpiX();
 #include "qgslayoutcustomdrophandler.h"
 #include "qgslayoutdesignerdialog.h"
 #include "qgslayoutmanager.h"
-#include "qgslayoutmanagerdialog.h"
 #include "qgslayoutqptdrophandler.h"
 #include "qgslayoutapputils.h"
 #include "qgslocatorwidget.h"
@@ -10587,13 +10586,7 @@ void QgisApp::reloadConnections()
 
 void QgisApp::showLayoutManager()
 {
-  if ( !mLayoutManagerDialog )
-  {
-    mLayoutManagerDialog = new QgsLayoutManagerDialog( this, Qt::Window );
-    mLayoutManagerDialog->setAttribute( Qt::WA_DeleteOnClose );
-  }
-  mLayoutManagerDialog->show();
-  mLayoutManagerDialog->activate();
+  static_cast< QgsAppWindowManager * >( QgsGui::windowManager() )->openApplicationDialog( QgsAppWindowManager::DialogLayoutManager );
 }
 
 QgsVectorLayer *QgisApp::addVectorLayer( const QString &vectorLayerPath, const QString &name, const QString &providerKey )

src/app/qgisapp.h

@@ -64,7 +64,6 @@ class QgsMasterLayoutInterface;
 class QgsLayoutCustomDropHandler;
 class QgsLayoutDesignerDialog;
 class QgsLayoutDesignerInterface;
-class QgsLayoutManagerDialog;
 class QgsMapCanvas;
 class QgsMapCanvasDockWidget;
 class QgsMapLayer;
@@ -2202,8 +2201,6 @@ class APP_EXPORT QgisApp : public QMainWindow, private Ui::MainWindow
     QgsDockWidget *mMapStylingDock = nullptr;
     QgsLayerStylingWidget *mMapStyleWidget = nullptr;
 
-    QPointer< QgsLayoutManagerDialog > mLayoutManagerDialog;
-
     //! Persistent tile scale slider
     QgsTileScaleWidget *mpTileScaleWidget = nullptr;
 

src/app/qgsappwindowmanager.cpp

@@ -17,12 +17,14 @@
 #include "qgsstylemanagerdialog.h"
 #include "qgsstyle.h"
 #include "qgisapp.h"
-
+#include "qgslayoutmanagerdialog.h"
 
 QgsAppWindowManager::~QgsAppWindowManager()
 {
   if ( mStyleManagerDialog )
     delete mStyleManagerDialog;
+  if ( mLayoutManagerDialog )
+    delete mLayoutManagerDialog;
 }
 
 QWidget *QgsAppWindowManager::openStandardDialog( QgsWindowManagerInterface::StandardDialog dialog )
@@ -43,3 +45,22 @@ QWidget *QgsAppWindowManager::openStandardDialog( QgsWindowManagerInterface::Sta
   }
   return nullptr;
 }
+
+QWidget *QgsAppWindowManager::openApplicationDialog( QgsAppWindowManager::ApplicationDialog dialog )
+{
+  switch ( dialog )
+  {
+    case DialogLayoutManager:
+    {
+      if ( !mLayoutManagerDialog )
+      {
+        mLayoutManagerDialog = new QgsLayoutManagerDialog( QgisApp::instance(), Qt::Window );
+        mLayoutManagerDialog->setAttribute( Qt::WA_DeleteOnClose );
+      }
+      mLayoutManagerDialog->show();
+      mLayoutManagerDialog->activate();
+    }
+    return nullptr;
+  }
+  return nullptr;
+}

src/app/qgsappwindowmanager.h

@@ -21,6 +21,7 @@
 #include <QPointer>
 
 class QgsStyleManagerDialog;
+class QgsLayoutManagerDialog;
 
 /**
  * \ingroup gui
@@ -30,13 +31,31 @@ class QgsAppWindowManager : public QgsWindowManagerInterface
 {
   public:
 
+    //! Application-only QGIS dialogs
+    enum ApplicationDialog
+    {
+      DialogLayoutManager = 0, //!< Layout manager dialog
+    };
+
     QgsAppWindowManager() = default;
     ~QgsAppWindowManager();
 
     QWidget *openStandardDialog( QgsWindowManagerInterface::StandardDialog dialog ) override;
 
+    /**
+     * Opens an instance of a application QGIS dialog. Depending on the dialog,
+     * this may either open a new instance of the dialog or bring an
+     * existing instance to the foreground.
+     *
+     * Returns the dialog if shown, or nullptr if the dialog either could not be
+     * created.
+     */
+    QWidget *openApplicationDialog( ApplicationDialog dialog );
+
   private:
     QPointer< QgsStyleManagerDialog > mStyleManagerDialog;
+    QPointer< QgsLayoutManagerDialog > mLayoutManagerDialog;
+
 };