Add layout view to layout designer

Author: nyalldawson

src/app/layout/qgslayoutdesignerdialog.cpp

@@ -20,6 +20,7 @@
 #include "qgssettings.h"
 #include "qgisapp.h"
 #include "qgslogger.h"
+#include "qgslayoutview.h"
 
 QgsAppLayoutDesignerInterface::QgsAppLayoutDesignerInterface( QgsLayoutDesignerDialog *dialog )
   : QgsLayoutDesignerInterface( dialog )
@@ -55,6 +56,26 @@ QgsLayoutDesignerDialog::QgsLayoutDesignerDialog( QWidget *parent, Qt::WindowFla
   setDockOptions( dockOptions() | QMainWindow::GroupedDragging ) ;
 #endif
 
+  //create layout view
+  QGridLayout *viewLayout = new QGridLayout();
+  viewLayout->setSpacing( 0 );
+  viewLayout->setMargin( 0 );
+  viewLayout->setContentsMargins( 0, 0, 0, 0 );
+  centralWidget()->layout()->setSpacing( 0 );
+  centralWidget()->layout()->setMargin( 0 );
+  centralWidget()->layout()->setContentsMargins( 0, 0, 0, 0 );
+  mView = new QgsLayoutView();
+  //mView->setMapCanvas( mQgis->mapCanvas() );
+  mView->setContentsMargins( 0, 0, 0, 0 );
+  //mView->setHorizontalRuler( mHorizontalRuler );
+  //mView->setVerticalRuler( mVerticalRuler );
+  viewLayout->addWidget( mView, 1, 1 );
+  //view does not accept focus via tab
+  mView->setFocusPolicy( Qt::ClickFocus );
+  mViewFrame->setLayout( viewLayout );
+  mViewFrame->setContentsMargins( 0, 0, 0, 1 ); // 1 is deliberate!
+  mView->setFrameShape( QFrame::NoFrame );
+
   connect( mActionClose, &QAction::triggered, this, &QWidget::close );
 
   // populate with initial items...

src/app/layout/qgslayoutdesignerdialog.h

@@ -21,6 +21,8 @@
 #include "qgslayoutdesignerinterface.h"
 
 class QgsLayoutDesignerDialog;
+class QgsLayoutView;
+
 
 class QgsAppLayoutDesignerInterface : public QgsLayoutDesignerInterface
 {
@@ -108,6 +110,8 @@ class QgsLayoutDesignerDialog: public QMainWindow, private Ui::QgsLayoutDesigner
 
     QActionGroup *mToolsActionGroup = nullptr;
 
+    QgsLayoutView *mView = nullptr;
+
 
     //! Save window state
     void saveWindowState();

src/gui/layout/qgslayoutview.cpp

@@ -21,7 +21,9 @@
 QgsLayoutView::QgsLayoutView( QWidget *parent )
   : QGraphicsView( parent )
 {
-
+  setResizeAnchor( QGraphicsView::AnchorViewCenter );
+  setMouseTracking( true );
+  viewport()->setMouseTracking( true );
 }
 
 QgsLayout *QgsLayoutView::currentLayout()

src/ui/layout/qgslayoutdesignerbase.ui

@@ -33,6 +33,9 @@
     <property name="bottomMargin">
      <number>0</number>
     </property>
+    <property name="spacing">
+     <number>0</number>
+    </property>
     <item row="0" column="0">
      <widget class="QFrame" name="mViewFrame">
       <property name="mouseTracking">
@@ -42,7 +45,7 @@
        <enum>QFrame::StyledPanel</enum>
       </property>
       <property name="frameShadow">
-       <enum>QFrame::Raised</enum>
+       <enum>QFrame::Plain</enum>
       </property>
      </widget>
     </item>