Restore rulers in layout designer

python/gui/gui_auto.sip

@@ -278,6 +278,7 @@
 %Include layertree/qgslayertreeviewdefaultactions.sip
 %Include layout/qgslayoutdesignerinterface.sip
 %Include layout/qgslayoutitemguiregistry.sip
+%Include layout/qgslayoutruler.sip
 %Include layout/qgslayoutview.sip
 %Include layout/qgslayoutviewtool.sip
 %Include layout/qgslayoutviewtooladditem.sip

python/gui/layout/qgslayoutruler.sip

@@ -0,0 +1,90 @@
+/************************************************************************
+ * This file has been generated automatically from                      *
+ *                                                                      *
+ * src/gui/layout/qgslayoutruler.h                                      *
+ *                                                                      *
+ * Do not edit manually ! Edit header and run scripts/sipify.pl again   *
+ ************************************************************************/
+
+
+
+class QgsLayoutRuler: QWidget
+{
+%Docstring
+ A custom ruler widget for use with QgsLayoutView, displaying the
+ current zoom and position of the visible layout and for interacting
+ with guides in a layout.
+
+.. versionadded:: 3.0
+%End
+
+%TypeHeaderCode
+#include "qgslayoutruler.h"
+%End
+  public:
+
+    explicit QgsLayoutRuler( QWidget *parent /TransferThis/ = 0, Qt::Orientation orientation = Qt::Horizontal );
+%Docstring
+ Constructor for QgsLayoutRuler, with the specified ``parent`` widget and ``orientation``.
+%End
+
+    virtual QSize minimumSizeHint() const;
+
+
+    void setSceneTransform( const QTransform &transform );
+%Docstring
+ Sets the current scene ``transform``. This is usually the transform set for a view
+ showing the associated scene, in order to synchronize the view's display of
+ the scene with the rulers.
+%End
+
+    QgsLayoutView *layoutView();
+%Docstring
+ Returns the current layout view associated with the ruler.
+.. seealso:: setLayoutView()
+ :rtype: QgsLayoutView
+%End
+
+    void setLayoutView( QgsLayoutView *view );
+%Docstring
+ Sets the current layout ``view`` to synchronize the ruler with.
+.. seealso:: layoutView()
+%End
+
+    int rulerSize() const;
+%Docstring
+ Returns the ruler size (either the height of a horizontal ruler or the
+ width of a vertical rule).
+ :rtype: int
+%End
+
+  public slots:
+
+    void setCursorPosition( QPointF position );
+%Docstring
+ Updates the ``position`` of the marker showing the current mouse position within
+ the view.
+ ``position`` is in layout coordinates.
+%End
+
+  protected:
+    virtual void paintEvent( QPaintEvent *event );
+
+    virtual void mouseMoveEvent( QMouseEvent *event );
+
+
+  signals:
+    void cursorPosChanged( QPointF );
+%Docstring
+Is emitted when mouse cursor coordinates change
+%End
+
+};
+
+/************************************************************************
+ * This file has been generated automatically from                      *
+ *                                                                      *
+ * src/gui/layout/qgslayoutruler.h                                      *
+ *                                                                      *
+ * Do not edit manually ! Edit header and run scripts/sipify.pl again   *
+ ************************************************************************/

python/gui/layout/qgslayoutview.sip

@@ -78,6 +78,18 @@ class QgsLayoutView: QGraphicsView
  Sets the zoom ``level`` for the view, where a zoom level of 1.0 corresponds to 100%.
 %End
 
+    void setHorizontalRuler( QgsLayoutRuler *ruler );
+%Docstring
+ Sets a horizontal ``ruler`` to synchronize with the view state.
+.. seealso:: setVerticalRuler()
+%End
+
+    void setVerticalRuler( QgsLayoutRuler *ruler );
+%Docstring
+ Sets a vertical ``ruler`` to synchronize with the view state.
+.. seealso:: setHorizontalRuler()
+%End
+
   public slots:
 
     void zoomFull();
@@ -122,6 +134,14 @@ class QgsLayoutView: QGraphicsView
 
     void emitZoomLevelChanged();
 
+    void updateRulers();
+%Docstring
+ Updates associated rulers after view extent or zoom has changed.
+ This should be called after calling any of the QGraphicsView
+ base class methods which alter the view's zoom level or extent,
+ i.e. QGraphicsView.fitInView().
+%End
+
   signals:
 
     void layoutSet( QgsLayout *layout );

src/app/layout/qgslayoutdesignerdialog.cpp

@@ -28,6 +28,7 @@
 #include "qgslayoutviewtoolselect.h"
 #include "qgsgui.h"
 #include "qgslayoutitemguiregistry.h"
+#include "qgslayoutruler.h"
 #include <QShortcut>
 #include <QComboBox>
 #include <QLineEdit>
@@ -88,11 +89,22 @@ QgsLayoutDesignerDialog::QgsLayoutDesignerDialog( QWidget *parent, Qt::WindowFla
   centralWidget()->layout()->setSpacing( 0 );
   centralWidget()->layout()->setMargin( 0 );
   centralWidget()->layout()->setContentsMargins( 0, 0, 0, 0 );
+
+  mHorizontalRuler = new QgsLayoutRuler( nullptr, Qt::Horizontal );
+  mVerticalRuler = new QgsLayoutRuler( nullptr, Qt::Vertical );
+  mRulerLayoutFix = new QWidget();
+  mRulerLayoutFix->setAttribute( Qt::WA_NoMousePropagation );
+  mRulerLayoutFix->setBackgroundRole( QPalette::Window );
+  mRulerLayoutFix->setFixedSize( mVerticalRuler->rulerSize(), mHorizontalRuler->rulerSize() );
+  viewLayout->addWidget( mRulerLayoutFix, 0, 0 );
+  viewLayout->addWidget( mHorizontalRuler, 0, 1 );
+  viewLayout->addWidget( mVerticalRuler, 1, 0 );
+
   mView = new QgsLayoutView();
   //mView->setMapCanvas( mQgis->mapCanvas() );
   mView->setContentsMargins( 0, 0, 0, 0 );
-  //mView->setHorizontalRuler( mHorizontalRuler );
-  //mView->setVerticalRuler( mVerticalRuler );
+  mView->setHorizontalRuler( mHorizontalRuler );
+  mView->setVerticalRuler( mVerticalRuler );
   viewLayout->addWidget( mView, 1, 1 );
   //view does not accept focus via tab
   mView->setFocusPolicy( Qt::ClickFocus );
@@ -186,6 +198,9 @@ QgsLayoutDesignerDialog::QgsLayoutDesignerDialog( QWidget *parent, Qt::WindowFla
   mView->setFocus();
   connect( mView, &QgsLayoutView::zoomLevelChanged, this, &QgsLayoutDesignerDialog::updateStatusZoom );
   connect( mView, &QgsLayoutView::cursorPosChanged, this, &QgsLayoutDesignerDialog::updateStatusCursorPos );
+  //also listen out for position updates from the horizontal/vertical rulers
+  connect( mHorizontalRuler, &QgsLayoutRuler::cursorPosChanged, this, &QgsLayoutDesignerDialog::updateStatusCursorPos );
+  connect( mVerticalRuler, &QgsLayoutRuler::cursorPosChanged, this, &QgsLayoutDesignerDialog::updateStatusCursorPos );
 
   restoreWindowState();
 }

src/app/layout/qgslayoutdesignerdialog.h

@@ -26,6 +26,7 @@ class QgsLayoutViewToolAddItem;
 class QgsLayoutViewToolPan;
 class QgsLayoutViewToolZoom;
 class QgsLayoutViewToolSelect;
+class QgsLayoutRuler;
 class QComboBox;
 class QSlider;
 class QLabel;
@@ -133,6 +134,9 @@ class QgsLayoutDesignerDialog: public QMainWindow, private Ui::QgsLayoutDesigner
     QActionGroup *mToolsActionGroup = nullptr;
 
     QgsLayoutView *mView = nullptr;
+    QgsLayoutRuler *mHorizontalRuler = nullptr;
+    QgsLayoutRuler *mVerticalRuler = nullptr;
+    QWidget *mRulerLayoutFix = nullptr;
 
     //! Combobox in status bar which shows/adjusts current zoom level
     QComboBox *mStatusZoomCombo = nullptr;

src/gui/CMakeLists.txt

@@ -159,6 +159,7 @@ SET(QGIS_GUI_SRCS
   layertree/qgslayertreeviewdefaultactions.cpp
 
   layout/qgslayoutitemguiregistry.cpp
+  layout/qgslayoutruler.cpp
   layout/qgslayoutview.cpp
   layout/qgslayoutviewmouseevent.cpp
   layout/qgslayoutviewrubberband.cpp
@@ -634,6 +635,7 @@ SET(QGIS_GUI_MOC_HDRS
 
   layout/qgslayoutdesignerinterface.h
   layout/qgslayoutitemguiregistry.h
+  layout/qgslayoutruler.h
   layout/qgslayoutview.h
   layout/qgslayoutviewtool.h
   layout/qgslayoutviewtooladditem.h