GameBrowser: Resize the grid cells when the icon size changes under the popup

The screen under a popup is only laid out, not recreated, so the grid kept the
cell size it was created with.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Common/UI/ViewGroup.h

@@ -327,6 +327,11 @@ public:
 	void SetPadding(const Margins &padding) {
 		padding_ = padding;
 	}
+	// Takes effect at the next layout.
+	void SetCellSize(int columnWidth, int rowHeight) {
+		settings_.columnWidth = columnWidth;
+		settings_.rowHeight = rowHeight;
+	}
 
 private:
 	GridLayoutSettings settings_;

UI/GameBrowser.cpp

@@ -302,6 +302,15 @@ void GameBrowser::Update() {
 	}
 }
 
+void GameBrowser::Measure(const UIContext &dc, UI::MeasureSpec horiz, UI::MeasureSpec vert) {
+	// Under a popup (like the one with the icon size buttons), the screen isn't recreated or updated,
+	// only laid out, so the grid picks up a new size here.
+	if (gameGrid_) {
+		gameGrid_->SetCellSize(150 * g_Config.fGameGridScale, 85 * g_Config.fGameGridScale);
+	}
+	LinearLayout::Measure(dc, horiz, vert);
+}
+
 void GameBrowser::Draw(UIContext &dc) {
 	using namespace UI;
 
@@ -396,6 +405,7 @@ void GameBrowser::Refresh() {
 	auto mm = GetI18NCategory(I18NCat::MAINMENU);
 
 	gameList_ = nullptr;
+	gameGrid_ = nullptr;
 
 	LinearLayout *topBar = new LinearLayout(ORIENT_HORIZONTAL, new LinearLayoutParams(FILL_PARENT, WRAP_CONTENT, Margins(0, 12, 8, 0)));
 	Add(topBar);
@@ -490,7 +500,9 @@ void GameBrowser::Refresh() {
 	gridSettingsChoice->OnClick.Handle(this, &GameBrowser::GridSettingsClick);
 
 	if (gridStyle) {
-		gameList_ = new UI::GridLayoutList(UI::GridLayoutSettings(150 * g_Config.fGameGridScale, 85 * g_Config.fGameGridScale), new LinearLayoutParams(FILL_PARENT, WRAP_CONTENT, Margins(0, 0, 6, 0)));
+		// Measure sets the cell size.
+		gameGrid_ = new UI::GridLayoutList(UI::GridLayoutSettings(), new LinearLayoutParams(FILL_PARENT, WRAP_CONTENT, Margins(0, 0, 6, 0)));
+		gameList_ = gameGrid_;
 	} else {
 		UI::LinearLayout *gl = new UI::LinearLayoutList(ORIENT_VERTICAL, new LinearLayoutParams(FILL_PARENT, WRAP_CONTENT));
 		gl->SetSpacing(4.0f);

UI/GameBrowser.h

@@ -46,6 +46,7 @@ public:
 	bool Key(const KeyInput &key) override;
 	bool Touch(const TouchInput &input) override;
 	void SetSearchFilter(const std::string &filter, bool setKeyboardFocus);
+	void Measure(const UIContext &dc, UI::MeasureSpec horiz, UI::MeasureSpec vert) override;
 	void Draw(UIContext &dc) override;
 	void Update() override;
 	void RequestRefresh() {
@@ -86,6 +87,8 @@ private:
 	void OnHomebrewStore(UI::EventParams &e);
 
 	UI::ViewGroup *gameList_ = nullptr;
+	// Same as gameList_ in the grid view, else null.
+	UI::GridLayoutList *gameGrid_ = nullptr;
 	PathBrowser path_;
 	int *viewMode_ = nullptr;
 	BrowseFlags browseFlags_;