[needs-docs][layouts] Move pushbutton actions for map items up to

a toolbar in the map item properties panel

This moves the
- refresh preview
- set to map canvas extent
- view extent in map canvas

buttons from being oversized push buttons within the item properties
panel up to a new toolbar at the top of this panel. Apart from looking
better, it means these important actions are always visible regardless
of the scroll position of the item properties panel itself.
Additionally, it makes it possible to add MORE actions here without
overloading the UI (e.g. "set canvas extent to item extent")

TODO: better icons

python/gui/auto_generated/layout/qgslayoutdesignerinterface.sip.in

@@ -44,6 +44,12 @@ open layout designer dialogs.
 %End
   public:
 
+    enum StandardTool
+    {
+      ToolMoveItemContent,
+      ToolMoveItemNodes,
+    };
+
     QgsLayoutDesignerInterface( QObject *parent /TransferThis/ = 0 );
 %Docstring
 Constructor for QgsLayoutDesignerInterface.
@@ -389,6 +395,13 @@ Removes the specified ``dock`` widget from layout designer (without deleting it)
 
 
 .. versionadded:: 3.4
+%End
+
+    virtual void activateTool( StandardTool tool ) = 0;
+%Docstring
+Activates a standard layout designer ``tool``.
+
+.. versionadded:: 3.6
 %End
 
   public slots:

python/gui/auto_generated/layout/qgslayoutitemwidget.sip.in

@@ -10,7 +10,6 @@
 
 
 
-
 class QgsLayoutConfigObject: QObject
 {
 %Docstring
@@ -99,6 +98,14 @@ Sets the ``string`` to use to describe the current report type (e.g.
 "atlas" or "report").
 Subclasses which display this text to users should override this
 and update their widget labels accordingly.
+%End
+
+    virtual void setDesignerInterface( QgsLayoutDesignerInterface *iface );
+%Docstring
+Sets the the layout designer interface in which the widget is
+being shown.
+
+.. versionadded:: 3.6
 %End
 
   protected:

src/app/layout/qgslayoutdesignerdialog.cpp

@@ -214,6 +214,23 @@ void QgsAppLayoutDesignerInterface::removeDockWidget( QDockWidget *dock )
   mDesigner->removeDockWidget( dock );
 }
 
+void QgsAppLayoutDesignerInterface::activateTool( QgsLayoutDesignerInterface::StandardTool tool )
+{
+  switch ( tool )
+  {
+    case QgsLayoutDesignerInterface::ToolMoveItemContent:
+      if ( !mDesigner->mActionMoveItemContent->isChecked() )
+        mDesigner->mActionMoveItemContent->trigger();
+      break;
+
+    case QgsLayoutDesignerInterface::ToolMoveItemNodes:
+      if ( !mDesigner->mActionEditNodesItem->isChecked() )
+        mDesigner->mActionEditNodesItem->trigger();
+      break;
+
+  }
+}
+
 void QgsAppLayoutDesignerInterface::close()
 {
   mDesigner->close();
@@ -1096,6 +1113,7 @@ void QgsLayoutDesignerDialog::showItemOptions( QgsLayoutItem *item, bool bringPa
   if ( ! widget )
     return;
 
+  widget->setDesignerInterface( iface() );
   widget->setReportTypeString( reportTypeString() );
 
   if ( QgsLayoutPagePropertiesWidget *ppWidget = qobject_cast< QgsLayoutPagePropertiesWidget * >( widget.get() ) )

src/app/layout/qgslayoutdesignerdialog.h

@@ -77,6 +77,7 @@ class QgsAppLayoutDesignerInterface : public QgsLayoutDesignerInterface
     QToolBar *atlasToolbar() override;
     void addDockWidget( Qt::DockWidgetArea area, QDockWidget *dock ) override;
     void removeDockWidget( QDockWidget *dock ) override;
+    void activateTool( StandardTool tool ) override;
 
   public slots:
 

src/app/layout/qgslayoutmapwidget.cpp

@@ -30,6 +30,7 @@
 #include "qgsstyle.h"
 #include "qgslayoutundostack.h"
 #include "qgslayoutatlas.h"
+#include "qgslayoutdesignerinterface.h"
 #include <QMenu>
 #include <QMessageBox>
 
@@ -41,9 +42,9 @@ QgsLayoutMapWidget::QgsLayoutMapWidget( QgsLayoutItemMap *item )
 
   setupUi( this );
   connect( mScaleLineEdit, &QLineEdit::editingFinished, this, &QgsLayoutMapWidget::mScaleLineEdit_editingFinished );
-  connect( mSetToMapCanvasExtentButton, &QPushButton::clicked, this, &QgsLayoutMapWidget::mSetToMapCanvasExtentButton_clicked );
-  connect( mViewExtentInCanvasButton, &QPushButton::clicked, this, &QgsLayoutMapWidget::mViewExtentInCanvasButton_clicked );
-  connect( mUpdatePreviewButton, &QPushButton::clicked, this, &QgsLayoutMapWidget::mUpdatePreviewButton_clicked );
+  connect( mActionSetToCanvasExtent, &QAction::triggered, this, &QgsLayoutMapWidget::setToMapCanvasExtent );
+  connect( mActionViewExtentInCanvas, &QAction::triggered, this, &QgsLayoutMapWidget::viewExtentInCanvas );
+  connect( mActionUpdatePreview, &QAction::triggered, this, &QgsLayoutMapWidget::updatePreview );
   connect( mFollowVisibilityPresetCheckBox, &QCheckBox::stateChanged, this, &QgsLayoutMapWidget::mFollowVisibilityPresetCheckBox_stateChanged );
   connect( mKeepLayerListCheckBox, &QCheckBox::stateChanged, this, &QgsLayoutMapWidget::mKeepLayerListCheckBox_stateChanged );
   connect( mKeepLayerStylesCheckBox, &QCheckBox::stateChanged, this, &QgsLayoutMapWidget::mKeepLayerStylesCheckBox_stateChanged );
@@ -77,9 +78,12 @@ QgsLayoutMapWidget::QgsLayoutMapWidget( QgsLayoutItemMap *item )
   connect( mOverviewListWidget, &QListWidget::itemChanged, this, &QgsLayoutMapWidget::mOverviewListWidget_itemChanged );
   connect( mLabelSettingsButton, &QPushButton::clicked, this, &QgsLayoutMapWidget::showLabelSettings );
 
+  connect( mActionMoveContent, &QAction::triggered, this, &QgsLayoutMapWidget::switchToMoveContentTool );
   setPanelTitle( tr( "Map Properties" ) );
   mMapRotationSpinBox->setClearValue( 0 );
 
+  mDockToolbar->setIconSize( QgisApp::instance()->iconSize( true ) );
+
   //add widget for general composer item properties
   mItemPropertiesWidget = new QgsLayoutItemPropertiesWidget( this, item );
   mainLayout->addWidget( mItemPropertiesWidget );
@@ -163,6 +167,11 @@ void QgsLayoutMapWidget::setReportTypeString( const QString &string )
   mAtlasPredefinedScaleRadio->setToolTip( tr( "Use one of the predefined scales of the project where the %1 feature best fits." ).arg( string ) );
 }
 
+void QgsLayoutMapWidget::setDesignerInterface( QgsLayoutDesignerInterface *iface )
+{
+  mInterface = iface;
+}
+
 bool QgsLayoutMapWidget::setNewItem( QgsLayoutItem *item )
 {
   if ( item->type() != QgsLayoutItemRegistry::LayoutMap )
@@ -352,6 +361,12 @@ void QgsLayoutMapWidget::showLabelSettings()
   openPanel( w );
 }
 
+void QgsLayoutMapWidget::switchToMoveContentTool()
+{
+  if ( mInterface )
+    mInterface->activateTool( QgsLayoutDesignerInterface::ToolMoveItemContent );
+}
+
 void QgsLayoutMapWidget::mAtlasCheckBox_toggled( bool checked )
 {
   if ( !mMapItem )
@@ -512,7 +527,7 @@ void QgsLayoutMapWidget::rotationChanged( double value )
   mMapItem->invalidateCache();
 }
 
-void QgsLayoutMapWidget::mSetToMapCanvasExtentButton_clicked()
+void QgsLayoutMapWidget::setToMapCanvasExtent()
 {
   if ( !mMapItem )
   {
@@ -543,7 +558,7 @@ void QgsLayoutMapWidget::mSetToMapCanvasExtentButton_clicked()
   mMapItem->layout()->undoStack()->endCommand();
 }
 
-void QgsLayoutMapWidget::mViewExtentInCanvasButton_clicked()
+void QgsLayoutMapWidget::viewExtentInCanvas()
 {
   if ( !mMapItem )
   {
@@ -779,8 +794,8 @@ void QgsLayoutMapWidget::blockAllSignals( bool b )
   mFollowVisibilityPresetCombo->blockSignals( b );
   mKeepLayerListCheckBox->blockSignals( b );
   mKeepLayerStylesCheckBox->blockSignals( b );
-  mSetToMapCanvasExtentButton->blockSignals( b );
-  mUpdatePreviewButton->blockSignals( b );
+  mActionSetToCanvasExtent->blockSignals( b );
+  mActionUpdatePreview->blockSignals( b );
 
   blockOverviewItemsSignals( b );
 }
@@ -830,7 +845,7 @@ void QgsLayoutMapWidget::handleChangedAnnotationDisplay( QgsLayoutItemMapGrid::B
   mMapItem->layout()->undoStack()->endCommand();
 }
 
-void QgsLayoutMapWidget::mUpdatePreviewButton_clicked()
+void QgsLayoutMapWidget::updatePreview()
 {
   if ( !mMapItem )
   {

src/app/layout/qgslayoutmapwidget.h

@@ -39,12 +39,13 @@ class QgsLayoutMapWidget: public QgsLayoutItemBaseWidget, private Ui::QgsLayoutM
     explicit QgsLayoutMapWidget( QgsLayoutItemMap *item );
 
     void setReportTypeString( const QString &string ) override;
+    void setDesignerInterface( QgsLayoutDesignerInterface *iface ) override;
 
   public slots:
     void mScaleLineEdit_editingFinished();
-    void mSetToMapCanvasExtentButton_clicked();
-    void mViewExtentInCanvasButton_clicked();
-    void mUpdatePreviewButton_clicked();
+    void setToMapCanvasExtent();
+    void viewExtentInCanvas();
+    void updatePreview();
     void mFollowVisibilityPresetCheckBox_stateChanged( int state );
     void mKeepLayerListCheckBox_stateChanged( int state );
     void mKeepLayerStylesCheckBox_stateChanged( int state );
@@ -118,9 +119,12 @@ class QgsLayoutMapWidget: public QgsLayoutItemBaseWidget, private Ui::QgsLayoutM
     void mapCrsChanged( const QgsCoordinateReferenceSystem &crs );
     void overviewSymbolChanged();
     void showLabelSettings();
+    void switchToMoveContentTool();
+
   private:
     QPointer< QgsLayoutItemMap > mMapItem;
     QgsLayoutItemPropertiesWidget *mItemPropertiesWidget = nullptr;
+    QgsLayoutDesignerInterface *mInterface = nullptr;
 
     //! Sets extent of composer map from line edits
     void updateComposerExtentFromGui();

src/gui/layout/qgslayoutdesignerinterface.h

@@ -66,6 +66,13 @@ class GUI_EXPORT QgsLayoutDesignerInterface: public QObject
 
   public:
 
+    //! Standard designer tools which are always available for use
+    enum StandardTool
+    {
+      ToolMoveItemContent, //!< Move item content tool
+      ToolMoveItemNodes, //!< Move item nodes tool
+    };
+
     /**
      * Constructor for QgsLayoutDesignerInterface.
      */
@@ -329,6 +336,13 @@ class GUI_EXPORT QgsLayoutDesignerInterface: public QObject
      */
     virtual void removeDockWidget( QDockWidget *dock ) = 0;
 
+    /**
+     * Activates a standard layout designer \a tool.
+     *
+     * \since QGIS 3.6
+     */
+    virtual void activateTool( StandardTool tool ) = 0;
+
   public slots:
 
     /**

src/gui/layout/qgslayoutitemwidget.cpp

@@ -180,6 +180,11 @@ void QgsLayoutItemBaseWidget::setReportTypeString( const QString & )
 {
 }
 
+void QgsLayoutItemBaseWidget::setDesignerInterface( QgsLayoutDesignerInterface * )
+{
+
+}
+
 void QgsLayoutItemBaseWidget::registerDataDefinedButton( QgsPropertyOverrideButton *button, QgsLayoutObject::DataDefinedProperty property )
 {
   mConfigObject->initializeDataDefinedButton( button, property );

src/gui/layout/qgslayoutitemwidget.h

@@ -23,7 +23,7 @@
 #include <QObject>
 #include <QPointer>
 
-
+class QgsLayoutDesignerInterface;
 class QgsPropertyOverrideButton;
 
 // NOTE - the inheritance here is tricky, as we need to avoid the multiple inheritance
@@ -151,6 +151,14 @@ class GUI_EXPORT QgsLayoutItemBaseWidget: public QgsPanelWidget
      */
     virtual void setReportTypeString( const QString &string );
 
+    /**
+     * Sets the the layout designer interface in which the widget is
+     * being shown.
+     *
+     * \since QGIS 3.6
+     */
+    virtual void setDesignerInterface( QgsLayoutDesignerInterface *iface );
+
   protected:
 
     /**