QML Designer: reload QML puppet when adding fonts

Automatically reload QML when importing fonts,
so that the newly added font can be viewed in 2D preview right away.

Note, this causes a visible flicker in the 2D preview.
If anyone has ideas how to make it smoother, I'm open to suggestions.

Fixes: QDS-14900
Change-Id: Ib7a354d0e25a087aabe690ebdafbf131b579dd40
Reviewed-by: Marco Bubke <marco.bubke@qt.io>

src/plugins/qmldesigner/components/componentcore/modelnodeoperations.cpp

@@ -1129,7 +1129,11 @@ static QString getAssetDefaultDirectory(const QString &assetDir, const QString &
 
 AddFilesResult addFontToProject(const QStringList &fileNames, const QString &defaultDir, bool showDialog)
 {
-    return addFilesToProject(fileNames, getAssetDefaultDirectory("fonts", defaultDir), showDialog);
+    const AddFilesResult result = addFilesToProject(fileNames,
+                                                    getAssetDefaultDirectory("fonts", defaultDir),
+                                                    showDialog);
+    QmlDesignerPlugin::viewManager().view()->resetPuppet();
+    return result;
 }
 
 AddFilesResult addSoundToProject(const QStringList &fileNames, const QString &defaultDir, bool showDialog)

src/plugins/qmldesigner/components/componentcore/viewmanager.cpp

@@ -512,6 +512,11 @@ const AbstractView *ViewManager::view() const
     return &d->nodeInstanceView;
 }
 
+AbstractView *ViewManager::view()
+{
+    return &d->nodeInstanceView;
+}
+
 TextEditorView *ViewManager::textEditorView()
 {
     return &d->textEditorView;

src/plugins/qmldesigner/components/componentcore/viewmanager.h

@@ -72,6 +72,7 @@ public:
     void nextFileIsCalledInternally();
 
     const AbstractView *view() const;
+    AbstractView *view();
     TextEditorView *textEditorView();
 
     void emitCustomNotification(const QString &identifier, const QList<ModelNode> &nodeList,