Qt: Move zoom logic entirely to game list widget

src/duckstation-qt/gamelistwidget.cpp

@@ -49,6 +49,7 @@ static constexpr int MAX_ICON_SIZE = 80;
 static constexpr float MIN_COVER_SCALE = 0.1f;
 static constexpr float DEFAULT_COVER_SCALE = 0.45f;
 static constexpr float MAX_COVER_SCALE = 2.0f;
+static constexpr float COVER_SCALE_STEP = 0.05f;
 
 static const char* SUPPORTED_FORMATS_STRING =
   QT_TRANSLATE_NOOP(GameListWidget, ".cue (Cue Sheets)\n"
@@ -1427,6 +1428,22 @@ bool GameListWidget::isShowingGameGrid() const
   return (m_ui.stack->currentIndex() == VIEW_MODE_GRID);
 }
 
+void GameListWidget::zoomOut()
+{
+  if (isShowingGameList())
+    m_list_view->adjustIconSize(-ICON_SIZE_STEP);
+  else if (isShowingGameGrid())
+    m_grid_view->adjustZoom(-COVER_SCALE_STEP);
+}
+
+void GameListWidget::zoomIn()
+{
+  if (isShowingGameList())
+    m_list_view->adjustIconSize(ICON_SIZE_STEP);
+  else if (isShowingGameGrid())
+    m_grid_view->adjustZoom(COVER_SCALE_STEP);
+}
+
 void GameListWidget::refresh(bool invalidate_cache)
 {
   cancelRefresh();
@@ -2023,16 +2040,6 @@ void GameListListView::adjustIconSize(int delta)
   m_model->setIconSize(new_size);
 }
 
-void GameListListView::zoomIn()
-{
-  adjustIconSize(ICON_SIZE_STEP);
-}
-
-void GameListListView::zoomOut()
-{
-  adjustIconSize(-ICON_SIZE_STEP);
-}
-
 GameListGridView::GameListGridView(GameListModel* model, GameListSortModel* sort_model, QWidget* parent)
   : QListView(parent), m_model(model)
 {
@@ -2062,9 +2069,9 @@ void GameListGridView::wheelEvent(QWheelEvent* e)
     if (dy != 0)
     {
       if (dy < 0)
-        zoomOut();
+        adjustZoom(-COVER_SCALE_STEP);
       else
-        zoomIn();
+        adjustZoom(COVER_SCALE_STEP);
 
       return;
     }
@@ -2085,22 +2092,6 @@ void GameListGridView::adjustZoom(float delta)
   m_model->setCoverScale(new_scale);
 }
 
-void GameListGridView::zoomIn()
-{
-  adjustZoom(0.05f);
-}
-
-void GameListGridView::zoomOut()
-{
-  adjustZoom(-0.05f);
-}
-
-void GameListGridView::setZoomPct(int int_scale)
-{
-  const float new_scale = std::clamp(static_cast<float>(int_scale) / 100.0f, MIN_COVER_SCALE, MAX_COVER_SCALE);
-  m_model->setCoverScale(new_scale);
-}
-
 void GameListGridView::updateLayout()
 {
   const int icon_width = m_model->getCoverArtSize();

src/duckstation-qt/gamelistwidget.h

@@ -177,16 +177,12 @@ public:
   void setFixedColumnWidth(const QFontMetrics& fm, int column, int str_width);
   void setAndSaveColumnHidden(int column, bool hidden);
 
-public Q_SLOTS:
-  void zoomOut();
-  void zoomIn();
+  void adjustIconSize(int delta);
 
 protected:
   void wheelEvent(QWheelEvent* e) override;
 
 private:
-  void adjustIconSize(int delta);
-
   void onHeaderSortIndicatorChanged(int, Qt::SortOrder);
   void onHeaderContextMenuRequested(const QPoint& point);
 
@@ -212,10 +208,9 @@ public:
   int horizontalOffset() const override;
   int verticalOffset() const override;
 
+  void adjustZoom(float delta);
+
 public Q_SLOTS:
-  void zoomOut();
-  void zoomIn();
-  void setZoomPct(int int_scale);
   void updateLayout();
 
 protected:
@@ -223,8 +218,6 @@ protected:
   void resizeEvent(QResizeEvent* e) override;
 
 private:
-  void adjustZoom(float delta);
-
   GameListModel* m_model = nullptr;
   int m_horizontal_offset = 0;
   int m_vertical_offset = 0;
@@ -253,6 +246,9 @@ public:
   bool isShowingGameList() const;
   bool isShowingGameGrid() const;
 
+  void zoomOut();
+  void zoomIn();
+
   const GameList::Entry* getSelectedEntry() const;
 
 Q_SIGNALS:

src/duckstation-qt/mainwindow.cpp

@@ -1460,10 +1460,7 @@ void MainWindow::onViewZoomInActionTriggered()
   if (!isShowingGameList())
     return;
 
-  if (m_game_list_widget->isShowingGameList())
-    m_game_list_widget->getListView()->zoomIn();
-  else if (m_game_list_widget->isShowingGameGrid())
-    m_game_list_widget->getGridView()->zoomIn();
+  m_game_list_widget->zoomIn();
 }
 
 void MainWindow::onViewZoomOutActionTriggered()
@@ -1471,10 +1468,7 @@ void MainWindow::onViewZoomOutActionTriggered()
   if (!isShowingGameList())
     return;
 
-  if (m_game_list_widget->isShowingGameList())
-    m_game_list_widget->getListView()->zoomOut();
-  else if (m_game_list_widget->isShowingGameGrid())
-    m_game_list_widget->getGridView()->zoomOut();
+  m_game_list_widget->zoomOut();
 }
 
 void MainWindow::onGitHubRepositoryActionTriggered()