refine radio button handling

ui/src/api.hxx

@@ -42,6 +42,13 @@ using ffi::Mode;
 using ffi::ShapeArgs;
 using ffi::RedrawArgs;
 
+/// Cast an integer to @c Mode, returning a fallback if the input is out of range.
+inline static Mode modeFromInt(std::uint32_t mode) {
+	if (mode > (std::uint32_t)Mode::Mesh)
+		return Mode::Solid;
+	return (Mode)mode;
+}
+
 class MutCore {
 	friend class BoxCore;
 

ui/src/main_window.cxx

@@ -37,7 +37,7 @@ void Hyperboloid::updateView() {
 	m_ui->layersDown->setMaximum(max_layers);
 	const auto color = m_ui->inBackground->color();
 	const ShapeArgs shape {
-		.mode = (Mode)m_ui->mode->checkedId(),
+		.mode = modeFromInt(m_ui->mode->checkedId()),
 		.sides = (std::uint32_t)m_ui->sides->value(),
 		.layers_up = (std::uint32_t)m_ui->layersUp->value(),
 		.layers_down = (std::uint32_t)m_ui->layersDown->value(),
@@ -57,9 +57,4 @@ void Hyperboloid::updateView() {
 	m_ui->viewport->setView(args);
 }
 
-void Hyperboloid::updateViewIf(bool update) {
-	if (update)
-		updateView();
-}
-
 #include "moc_main_window.cpp"

ui/src/main_window.hxx

@@ -17,7 +17,6 @@ public:
 public slots:
 	void updateModeUi();
 	void updateView();
-	void updateViewIf(bool update); // for radio buttons
 
 private:
 	const std::unique_ptr<Ui::MainWindow> m_ui;

ui/src/main_window.ui

@@ -618,7 +618,6 @@
  </connections>
  <slots>
   <slot>updateView()</slot>
-  <slot>updateViewIf(bool)</slot>
   <slot>updateModeUi()</slot>
  </slots>
  <buttongroups>