[needs-docs] Add an indicator icon for layers with an unknown/invalid CRS

src/app/CMakeLists.txt

@@ -62,6 +62,7 @@ SET(QGIS_APP_SRCS
   qgslayertreeviewembeddedindicator.cpp
   qgslayertreeviewfilterindicator.cpp
   qgslayertreeviewmemoryindicator.cpp
+  qgslayertreeviewnocrsindicator.cpp
   qgslayertreeviewnonremovableindicator.cpp
   qgslayertreeviewbadlayerindicator.cpp
   qgsmapcanvasdockwidget.cpp
@@ -309,6 +310,7 @@ SET (QGIS_APP_MOC_HDRS
   qgslayertreeviewembeddedindicator.h
   qgslayertreeviewmemoryindicator.h
   qgslayertreeviewfilterindicator.h
+  qgslayertreeviewnocrsindicator.h
   qgslayertreeviewnonremovableindicator.h
   qgslayertreeviewbadlayerindicator.h
   qgsmapcanvasdockwidget.h

src/app/qgisapp.cpp

@@ -224,6 +224,7 @@ Q_GUI_EXPORT extern int qt_defaultDpiX();
 #include "qgslayertreeviewmemoryindicator.h"
 #include "qgslayertreeviewbadlayerindicator.h"
 #include "qgslayertreeviewnonremovableindicator.h"
+#include "qgslayertreeviewnocrsindicator.h"
 #include "qgslayout.h"
 #include "qgslayoutatlas.h"
 #include "qgslayoutcustomdrophandler.h"
@@ -4160,6 +4161,7 @@ void QgisApp::initLayerTreeView()
   new QgsLayerTreeViewFilterIndicatorProvider( mLayerTreeView );  // gets parented to the layer view
   new QgsLayerTreeViewEmbeddedIndicatorProvider( mLayerTreeView );  // gets parented to the layer view
   new QgsLayerTreeViewMemoryIndicatorProvider( mLayerTreeView );  // gets parented to the layer view
+  new QgsLayerTreeViewNoCrsIndicatorProvider( mLayerTreeView );  // gets parented to the layer view
   QgsLayerTreeViewBadLayerIndicatorProvider *badLayerIndicatorProvider = new QgsLayerTreeViewBadLayerIndicatorProvider( mLayerTreeView );  // gets parented to the layer view
   connect( badLayerIndicatorProvider, &QgsLayerTreeViewBadLayerIndicatorProvider::requestChangeDataSource, this, &QgisApp::changeDataSource );
   new QgsLayerTreeViewNonRemovableIndicatorProvider( mLayerTreeView );  // gets parented to the layer view

src/app/qgslayertreeviewnocrsindicator.cpp

@@ -0,0 +1,65 @@
+/***************************************************************************
+  qgslayertreeviewnocrsindicator.h
+  --------------------------------------
+  Date                 : October 2019
+  Copyright            : (C) 2019 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 "qgslayertreeviewnocrsindicator.h"
+#include "qgslayertreeview.h"
+#include "qgslayertree.h"
+#include "qgslayertreemodel.h"
+#include "qgslayertreeutils.h"
+#include "qgsvectorlayer.h"
+#include "qgisapp.h"
+
+QgsLayerTreeViewNoCrsIndicatorProvider::QgsLayerTreeViewNoCrsIndicatorProvider( QgsLayerTreeView *view )
+  : QgsLayerTreeViewIndicatorProvider( view )
+{
+}
+
+void QgsLayerTreeViewNoCrsIndicatorProvider::onIndicatorClicked( const QModelIndex &index )
+{
+  QgsLayerTreeNode *node = mLayerTreeView->layerTreeModel()->index2node( index );
+  if ( !QgsLayerTree::isLayer( node ) )
+    return;
+
+  // TODO
+}
+
+bool QgsLayerTreeViewNoCrsIndicatorProvider::acceptLayer( QgsMapLayer *layer )
+{
+  return layer &&  layer->isSpatial() && !layer->crs().isValid();
+}
+
+QString QgsLayerTreeViewNoCrsIndicatorProvider::iconName( QgsMapLayer *layer )
+{
+  Q_UNUSED( layer )
+  return QStringLiteral( "/mIconProjectionDisabled.svg" );
+}
+
+QString QgsLayerTreeViewNoCrsIndicatorProvider::tooltipText( QgsMapLayer *layer )
+{
+  Q_UNUSED( layer )
+  return tr( "<b>Layer has no coordinate reference system set!</b><br>This layer is not georeferenced and has no geographic location available." );
+}
+
+void QgsLayerTreeViewNoCrsIndicatorProvider::connectSignals( QgsMapLayer *layer )
+{
+  QgsLayerTreeViewIndicatorProvider::connectSignals( layer );
+  connect( layer, &QgsMapLayer::crsChanged, this, &QgsLayerTreeViewNoCrsIndicatorProvider::onLayerChanged );
+}
+
+void QgsLayerTreeViewNoCrsIndicatorProvider::disconnectSignals( QgsMapLayer *layer )
+{
+  QgsLayerTreeViewIndicatorProvider::disconnectSignals( layer );
+  disconnect( layer, &QgsMapLayer::crsChanged, this, &QgsLayerTreeViewNoCrsIndicatorProvider::onLayerChanged );
+}

src/app/qgslayertreeviewnocrsindicator.h

@@ -0,0 +1,43 @@
+/***************************************************************************
+  qgslayertreeviewnocrsindicator.h
+  --------------------------------------
+  Date                 : October 2019
+  Copyright            : (C) 2019 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.                                   *
+ *                                                                         *
+ ***************************************************************************/
+
+#ifndef QGSLAYERTREEVIEWNOCRSINDICATOR_H
+#define QGSLAYERTREEVIEWNOCRSINDICATOR_H
+
+#include "qgslayertreeviewindicatorprovider.h"
+
+//! Adds indicators showing whether layers have an unknown/not set CRS
+class QgsLayerTreeViewNoCrsIndicatorProvider : public QgsLayerTreeViewIndicatorProvider
+{
+    Q_OBJECT
+  public:
+    explicit QgsLayerTreeViewNoCrsIndicatorProvider( QgsLayerTreeView *view );
+
+  protected:
+
+    void connectSignals( QgsMapLayer *layer ) override;
+    void disconnectSignals( QgsMapLayer *layer ) override;
+
+  protected slots:
+
+    void onIndicatorClicked( const QModelIndex &index ) override;
+
+  private:
+    bool acceptLayer( QgsMapLayer *layer ) override;
+    QString iconName( QgsMapLayer *layer ) override;
+    QString tooltipText( QgsMapLayer *layer ) override;
+};
+
+#endif // QGSLAYERTREEVIEWNOCRSINDICATOR_H