Fix a crash in the smart playlist preview when the moodbar column is enabled

src/library/libraryview.cpp

@@ -531,7 +531,7 @@ void LibraryView::FilterReturnPressed() {
 }
 
 void LibraryView::NewSmartPlaylist() {
-  Wizard* wizard = new Wizard(app_->library_backend(), this);
+  Wizard* wizard = new Wizard(app_, app_->library_backend(), this);
   wizard->setAttribute(Qt::WA_DeleteOnClose);
   connect(wizard, SIGNAL(accepted()), SLOT(NewSmartPlaylistFinished()));
 
@@ -539,7 +539,7 @@ void LibraryView::NewSmartPlaylist() {
 }
 
 void LibraryView::EditSmartPlaylist() {
-  Wizard* wizard = new Wizard(app_->library_backend(), this);
+  Wizard* wizard = new Wizard(app_, app_->library_backend(), this);
   wizard->setAttribute(Qt::WA_DeleteOnClose);
   connect(wizard, SIGNAL(accepted()), SLOT(EditSmartPlaylistFinished()));
 

src/smartplaylists/querywizardplugin.cpp

@@ -71,8 +71,8 @@ public:
 };
 
 
-QueryWizardPlugin::QueryWizardPlugin(LibraryBackend* library, QObject* parent)
-  : WizardPlugin(library, parent),
+QueryWizardPlugin::QueryWizardPlugin(Application* app, LibraryBackend* library, QObject* parent)
+  : WizardPlugin(app, library, parent),
     search_page_(NULL),
     previous_scrollarea_max_(0)
 {
@@ -118,6 +118,7 @@ int QueryWizardPlugin::CreatePages(QWizard* wizard, int finish_page_id) {
   QVBoxLayout* terms_page_layout = static_cast<QVBoxLayout*>(search_page_->layout());
   terms_page_layout->addStretch();
   search_page_->preview_ = new SearchPreview(search_page_);
+  search_page_->preview_->set_application(app_);
   search_page_->preview_->set_library(library_);
   terms_page_layout->addWidget(search_page_->preview_);
 
@@ -136,6 +137,7 @@ int QueryWizardPlugin::CreatePages(QWizard* wizard, int finish_page_id) {
   sort_ui_->limit_none->setChecked(true);
 
   // Set up the preview widget that's already at the bottom of the sort page
+  sort_ui_->preview->set_application(app_);
   sort_ui_->preview->set_library(library_);
   connect(sort_ui_->field, SIGNAL(toggled(bool)), SLOT(UpdateSortPreview()));
   connect(sort_ui_->field_value, SIGNAL(currentIndexChanged(int)), SLOT(UpdateSortPreview()));

src/smartplaylists/querywizardplugin.h

@@ -39,7 +39,7 @@ class QueryWizardPlugin : public WizardPlugin {
   Q_OBJECT
 
 public:
-  QueryWizardPlugin(LibraryBackend* library, QObject* parent);
+  QueryWizardPlugin(Application* app, LibraryBackend* library, QObject* parent);
   ~QueryWizardPlugin();
 
   QString type() const { return "Query"; }

src/smartplaylists/searchpreview.cpp

@@ -49,6 +49,10 @@ SearchPreview::~SearchPreview() {
   delete ui_;
 }
 
+void SearchPreview::set_application(Application* app) {
+  ui_->tree->SetApplication(app);
+}
+
 void SearchPreview::set_library(LibraryBackend* backend) {
   backend_ = backend;
 

src/smartplaylists/searchpreview.h

@@ -23,6 +23,7 @@
 
 #include <QWidget>
 
+class Application;
 class LibraryBackend;
 class Playlist;
 class Ui_SmartPlaylistSearchPreview;
@@ -36,6 +37,7 @@ public:
   SearchPreview(QWidget *parent = 0);
   ~SearchPreview();
 
+  void set_application(Application* app);
   void set_library(LibraryBackend* backend);
 
   void Update(const Search& search);

src/smartplaylists/wizard.cpp

@@ -55,8 +55,9 @@ public:
   Ui_SmartPlaylistWizardFinishPage* ui_;
 };
 
-Wizard::Wizard(LibraryBackend* library, QWidget* parent)
+Wizard::Wizard(Application* app, LibraryBackend* library, QWidget* parent)
   : QWizard(parent),
+    app_(app),
     library_(library),
     type_page_(new TypePage(this)),
     finish_page_(new FinishPage(this)),
@@ -83,7 +84,7 @@ Wizard::Wizard(LibraryBackend* library, QWidget* parent)
   connect(type_mapper_, SIGNAL(mapped(int)), SLOT(TypeChanged(int)));
 
   new QVBoxLayout(type_page_);
-  AddPlugin(new QueryWizardPlugin(library_, this));
+  AddPlugin(new QueryWizardPlugin(app_, library_, this));
 
   // Skip the type page - remove this when we have more than one type
   setStartId(2);

src/smartplaylists/wizard.h

@@ -22,6 +22,7 @@
 
 #include <QWizard>
 
+class Application;
 class LibraryBackend;
 class Ui_SmartPlaylistWizardFinishPage;
 
@@ -35,7 +36,7 @@ class Wizard : public QWizard {
   Q_OBJECT
 
 public:
-  Wizard(LibraryBackend* library, QWidget* parent);
+  Wizard(Application* app, LibraryBackend* library, QWidget* parent);
   ~Wizard();
 
   void SetGenerator(GeneratorPtr gen);
@@ -54,6 +55,7 @@ private slots:
   void TypeChanged(int index);
 
 private:
+  Application* app_;
   LibraryBackend* library_;
   TypePage* type_page_;
   FinishPage* finish_page_;

src/smartplaylists/wizardplugin.cpp

@@ -19,8 +19,9 @@
 
 namespace smart_playlists {
 
-WizardPlugin::WizardPlugin(LibraryBackend* library, QObject* parent)
+WizardPlugin::WizardPlugin(Application* app, LibraryBackend* library, QObject* parent)
   : QObject(parent),
+    app_(app),
     library_(library),
     start_page_(-1)
 {

src/smartplaylists/wizardplugin.h

@@ -22,6 +22,7 @@
 
 #include "generator_fwd.h"
 
+class Application;
 class LibraryBackend;
 
 class QWizard;
@@ -32,7 +33,7 @@ class WizardPlugin : public QObject {
   Q_OBJECT
 
 public:
-  WizardPlugin(LibraryBackend* library, QObject* parent);
+  WizardPlugin(Application* app, LibraryBackend* library, QObject* parent);
 
   virtual QString type() const = 0;
   virtual QString name() const = 0;
@@ -48,6 +49,7 @@ public:
 protected:
   virtual int CreatePages(QWizard* wizard, int finish_page_id) = 0;
 
+  Application* app_;
   LibraryBackend* library_;
 
 private: