Add possibility for point cloud renderers to create checkable legend …

…nodes (not implemented for any renderers yet)
qgis · Dec 3, 2020 · 91048d4 · 91048d4
1 parent 9bcdcf6
commit 91048d4
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diff --git a/python/core/auto_generated/pointcloud/qgspointcloudrenderer.sip.in b/python/core/auto_generated/pointcloud/qgspointcloudrenderer.sip.in
@@ -218,6 +218,20 @@ Calls to :py:func:`~QgsPointCloudRenderer.stopRender` must always be preceded by
    the renderer should instead be cloned and :py:func:`~QgsPointCloudRenderer.startRender`/:py:func:`~QgsPointCloudRenderer.stopRender` called on the clone.
 
 .. seealso:: :py:func:`startRender`
+%End
+
+    virtual bool legendItemChecked( const QString &key );
+%Docstring
+Returns ``True`` if the legend item with the specified ``key`` is checked.
+
+.. seealso:: :py:func:`checkLegendItem`
+%End
+
+    virtual void checkLegendItem( const QString &key, bool state = true );
+%Docstring
+Called when the check state of the legend item with the specified ``key`` is changed.
+
+.. seealso:: :py:func:`legendItemChecked`
 %End
 
     void setPointSize( double size );

diff --git a/src/core/layertree/qgslayertreemodellegendnode.cpp b/src/core/layertree/qgslayertreemodellegendnode.cpp
@@ -27,6 +27,8 @@
 #include "qgssymbollayerutils.h"
 #include "qgsimageoperation.h"
 #include "qgsvectorlayer.h"
+#include "qgspointcloudlayer.h"
+#include "qgspointcloudrenderer.h"
 #include "qgsrasterrenderer.h"
 #include "qgsexpressioncontextutils.h"
 #include "qgsfeatureid.h"
@@ -974,6 +976,14 @@ QVariant QgsRasterSymbolLegendNode::data( int role ) const
       if ( !mCheckable )
         return QVariant();
 
+      if ( QgsPointCloudLayer *pclayer = qobject_cast<QgsPointCloudLayer *>( mLayerNode->layer() ) )
+      {
+        if ( !pclayer->renderer() )
+          return QVariant();
+
+        return pclayer->renderer()->legendItemChecked( mRuleKey ) ? Qt::Checked : Qt::Unchecked;
+      }
+
       return QVariant();
     }
 
@@ -990,7 +1000,23 @@ bool QgsRasterSymbolLegendNode::setData( const QVariant &value, int role )
   if ( !mCheckable )
     return false;
 
-  return false;
+  if ( QgsPointCloudLayer *pclayer = qobject_cast<QgsPointCloudLayer *>( mLayerNode->layer() ) )
+  {
+    if ( !pclayer->renderer() )
+      return false;
+
+    pclayer->renderer()->checkLegendItem( mRuleKey, value == Qt::Checked );
+
+    emit dataChanged();
+    pclayer->emitStyleChanged();
+
+    pclayer->triggerRepaint();
+    return true;
+  }
+  else
+  {
+    return false;
+  }
 }
 
 

diff --git a/src/core/pointcloud/qgspointcloudrenderer.cpp b/src/core/pointcloud/qgspointcloudrenderer.cpp
@@ -91,6 +91,16 @@ void QgsPointCloudRenderer::stopRender( QgsPointCloudRenderContext & )
 #endif
 }
 
+bool QgsPointCloudRenderer::legendItemChecked( const QString & )
+{
+  return false;
+}
+
+void QgsPointCloudRenderer::checkLegendItem( const QString &, bool )
+{
+
+}
+
 double QgsPointCloudRenderer::maximumScreenError() const
 {
   return mMaximumScreenError;

diff --git a/src/core/pointcloud/qgspointcloudrenderer.h b/src/core/pointcloud/qgspointcloudrenderer.h
@@ -290,6 +290,20 @@ class CORE_EXPORT QgsPointCloudRenderer
      */
     virtual void stopRender( QgsPointCloudRenderContext &context );
 
+    /**
+     * Returns TRUE if the legend item with the specified \a key is checked.
+     *
+     * \see checkLegendItem()
+     */
+    virtual bool legendItemChecked( const QString &key );
+
+    /**
+     * Called when the check state of the legend item with the specified \a key is changed.
+     *
+     * \see legendItemChecked()
+     */
+    virtual void checkLegendItem( const QString &key, bool state = true );
+
     /**
      * Sets the point \a size. Point size units are specified via setPointSizeUnit().
      * \see pointSize()