Make style model refresh icons when svg cache fetches a remote image

Author: nyalldawson

src/core/symbology/qgsstylemodel.cpp

@@ -16,6 +16,8 @@
 #include "qgsstylemodel.h"
 #include "qgsstyle.h"
 #include "qgssymbollayerutils.h"
+#include "qgsapplication.h"
+#include "qgssvgcache.h"
 #include <QIcon>
 
 const double ICON_PADDING_FACTOR = 0.16;
@@ -38,6 +40,13 @@ QgsStyleModel::QgsStyleModel( QgsStyle *style, QObject *parent )
   connect( mStyle, &QgsStyle::rampRenamed, this, &QgsStyleModel::onRampRename );
 
   connect( mStyle, &QgsStyle::entityTagsChanged, this, &QgsStyleModel::onTagsChanged );
+
+  // when a remote svg has been fetched, update the model's decorations.
+  // this is required if a symbol utilizes remote svgs, and the current icons
+  // have been generated using the temporary "downloading" svg. In this case
+  // we require the preview to be regenerated to use the correct fetched
+  // svg
+  connect( QgsApplication::svgCache(), &QgsSvgCache::remoteSvgFetched, this, &QgsStyleModel::rebuildSymbolIcons );
 }
 
 QVariant QgsStyleModel::data( const QModelIndex &index, int role ) const
@@ -403,6 +412,12 @@ void QgsStyleModel::onTagsChanged( int entity, const QString &name, const QStrin
   emit dataChanged( i, i );
 }
 
+void QgsStyleModel::rebuildSymbolIcons()
+{
+  mSymbolIconCache.clear();
+  emit dataChanged( index( 0, 0 ), index( mSymbolNames.count() - 1, 0 ), QVector<int>() << Qt::DecorationRole );
+}
+
 //
 // QgsStyleProxyModel
 //

src/core/symbology/qgsstylemodel.h

@@ -96,6 +96,7 @@ class CORE_EXPORT QgsStyleModel: public QAbstractItemModel
     void onRampChanged( const QString &name );
     void onRampRename( const QString &oldName, const QString &newName );
     void onTagsChanged( int entity, const QString &name, const QStringList &tags );
+    void rebuildSymbolIcons();
 
   private:
 

src/gui/symbology/qgssymbolslistwidget.cpp

@@ -29,7 +29,6 @@
 #include "qgssettings.h"
 #include "qgsnewauxiliarylayerdialog.h"
 #include "qgsauxiliarystorage.h"
-#include "qgssvgcache.h"
 #include "qgsstylemodel.h"
 
 #include <QAction>
@@ -210,13 +209,6 @@ QgsSymbolsListWidget::QgsSymbolsListWidget( QgsSymbol *symbol, QgsStyle *style,
   connect( btnSaveSymbol, &QPushButton::clicked, this, &QgsSymbolsListWidget::saveSymbol );
 
   connect( mOpacityWidget, &QgsOpacityWidget::opacityChanged, this, &QgsSymbolsListWidget::opacityChanged );
-
-  // when a remote svg has been fetched, update the widget's previews
-  // this is required if the symbol utilizes remote svgs, and the current previews
-  // have been generated using the temporary "downloading" svg. In this case
-  // we require the preview to be regenerated to use the correct fetched
-  // svg
-  connect( QgsApplication::svgCache(), &QgsSvgCache::remoteSvgFetched, this, &QgsSymbolsListWidget::updateModelFilters );
 }
 
 QgsSymbolsListWidget::~QgsSymbolsListWidget()