Desktop: UI scale preference (#3475)

* ui scale preference

* cleanup

* add update ui scale message to SIDE_EFFECT_FREE_MESSAGES

* fix mac title bar height

* hide UI preference section on web

* set % as unit of ui scale

editor/src/messages/dialog/preferences_dialog/preferences_dialog_message_handler.rs

@@ -1,4 +1,4 @@
-use crate::consts::{VIEWPORT_ZOOM_WHEEL_RATE, VIEWPORT_ZOOM_WHEEL_RATE_CHANGE};
+use crate::consts::{UI_SCALE_DEFAULT, UI_SCALE_MAX, UI_SCALE_MIN, VIEWPORT_ZOOM_WHEEL_RATE, VIEWPORT_ZOOM_WHEEL_RATE_CHANGE};
 use crate::messages::layout::utility_types::widget_prelude::*;
 use crate::messages::portfolio::document::utility_types::wires::GraphWireStyle;
 use crate::messages::preferences::SelectionMode;
@@ -36,250 +36,273 @@ impl PreferencesDialogMessageHandler {
 	const TITLE: &'static str = "Editor Preferences";
 
 	fn layout(&self, preferences: &PreferencesMessageHandler) -> Layout {
+		let mut rows = Vec::new();
+
 		// ==========
 		// NAVIGATION
 		// ==========
+		{
+			let header = vec![TextLabel::new("Navigation").italic(true).widget_instance()];
 
-		let navigation_header = vec![TextLabel::new("Navigation").italic(true).widget_instance()];
+			let zoom_rate_description = "Adjust how fast zooming occurs when using the scroll wheel or pinch gesture (relative to a default of 50).";
+			let zoom_rate_label = vec![
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				TextLabel::new("Zoom Rate").tooltip_label("Zoom Rate").tooltip_description(zoom_rate_description).widget_instance(),
+			];
+			let zoom_rate = vec![
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				NumberInput::new(Some(map_zoom_rate_to_display(preferences.viewport_zoom_wheel_rate)))
+					.tooltip_label("Zoom Rate")
+					.tooltip_description(zoom_rate_description)
+					.mode_range()
+					.int()
+					.min(1.)
+					.max(100.)
+					.on_update(|number_input: &NumberInput| {
+						if let Some(display_value) = number_input.value {
+							let actual_rate = map_display_to_zoom_rate(display_value);
+							PreferencesMessage::ViewportZoomWheelRate { rate: actual_rate }.into()
+						} else {
+							PreferencesMessage::ViewportZoomWheelRate { rate: VIEWPORT_ZOOM_WHEEL_RATE }.into()
+						}
+					})
+					.widget_instance(),
+			];
 
-		let zoom_rate_description = "Adjust how fast zooming occurs when using the scroll wheel or pinch gesture (relative to a default of 50).";
-		let zoom_rate_label = vec![
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			TextLabel::new("Zoom Rate").tooltip_label("Zoom Rate").tooltip_description(zoom_rate_description).widget_instance(),
-		];
-		let zoom_rate = vec![
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			NumberInput::new(Some(map_zoom_rate_to_display(preferences.viewport_zoom_wheel_rate)))
-				.tooltip_label("Zoom Rate")
-				.tooltip_description(zoom_rate_description)
-				.mode_range()
-				.int()
-				.min(1.)
-				.max(100.)
-				.on_update(|number_input: &NumberInput| {
-					if let Some(display_value) = number_input.value {
-						let actual_rate = map_display_to_zoom_rate(display_value);
-						PreferencesMessage::ViewportZoomWheelRate { rate: actual_rate }.into()
-					} else {
-						PreferencesMessage::ViewportZoomWheelRate { rate: VIEWPORT_ZOOM_WHEEL_RATE }.into()
-					}
-				})
-				.widget_instance(),
-		];
+			let checkbox_id = CheckboxId::new();
+			let zoom_with_scroll_description = "Use the scroll wheel for zooming instead of vertically panning (not recommended for trackpads).";
+			let zoom_with_scroll = vec![
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				CheckboxInput::new(preferences.zoom_with_scroll)
+					.tooltip_label("Zoom with Scroll")
+					.tooltip_description(zoom_with_scroll_description)
+					.on_update(|checkbox_input: &CheckboxInput| {
+						PreferencesMessage::ModifyLayout {
+							zoom_with_scroll: checkbox_input.checked,
+						}
+						.into()
+					})
+					.for_label(checkbox_id)
+					.widget_instance(),
+				TextLabel::new("Zoom with Scroll")
+					.tooltip_label("Zoom with Scroll")
+					.tooltip_description(zoom_with_scroll_description)
+					.for_checkbox(checkbox_id)
+					.widget_instance(),
+			];
 
-		let checkbox_id = CheckboxId::new();
-		let zoom_with_scroll_description = "Use the scroll wheel for zooming instead of vertically panning (not recommended for trackpads).";
-		let zoom_with_scroll = vec![
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			CheckboxInput::new(preferences.zoom_with_scroll)
-				.tooltip_label("Zoom with Scroll")
-				.tooltip_description(zoom_with_scroll_description)
-				.on_update(|checkbox_input: &CheckboxInput| {
-					PreferencesMessage::ModifyLayout {
-						zoom_with_scroll: checkbox_input.checked,
-					}
-					.into()
-				})
-				.for_label(checkbox_id)
-				.widget_instance(),
-			TextLabel::new("Zoom with Scroll")
-				.tooltip_label("Zoom with Scroll")
-				.tooltip_description(zoom_with_scroll_description)
-				.for_checkbox(checkbox_id)
-				.widget_instance(),
-		];
+			rows.extend_from_slice(&[header, zoom_rate_label, zoom_rate, zoom_with_scroll]);
+		}
 
 		// =======
 		// EDITING
 		// =======
+		{
+			let header = vec![TextLabel::new("Editing").italic(true).widget_instance()];
 
-		let editing_header = vec![TextLabel::new("Editing").italic(true).widget_instance()];
+			let selection_label = vec![
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				TextLabel::new("Selection")
+					.tooltip_label("Selection")
+					.tooltip_description("Choose how targets are selected within dragged rectangular and lasso areas.")
+					.widget_instance(),
+			];
 
-		let selection_label = vec![
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			TextLabel::new("Selection")
-				.tooltip_label("Selection")
-				.tooltip_description("Choose how targets are selected within dragged rectangular and lasso areas.")
-				.widget_instance(),
-		];
+			let selection_mode = RadioInput::new(vec![
+				RadioEntryData::new(SelectionMode::Touched.to_string())
+					.label(SelectionMode::Touched.to_string())
+					.tooltip_label(SelectionMode::Touched.to_string())
+					.tooltip_description(SelectionMode::Touched.tooltip_description())
+					.on_update(move |_| {
+						PreferencesMessage::SelectionMode {
+							selection_mode: SelectionMode::Touched,
+						}
+						.into()
+					}),
+				RadioEntryData::new(SelectionMode::Enclosed.to_string())
+					.label(SelectionMode::Enclosed.to_string())
+					.tooltip_label(SelectionMode::Enclosed.to_string())
+					.tooltip_description(SelectionMode::Enclosed.tooltip_description())
+					.on_update(move |_| {
+						PreferencesMessage::SelectionMode {
+							selection_mode: SelectionMode::Enclosed,
+						}
+						.into()
+					}),
+				RadioEntryData::new(SelectionMode::Directional.to_string())
+					.label(SelectionMode::Directional.to_string())
+					.tooltip_label(SelectionMode::Directional.to_string())
+					.tooltip_description(SelectionMode::Directional.tooltip_description())
+					.on_update(move |_| {
+						PreferencesMessage::SelectionMode {
+							selection_mode: SelectionMode::Directional,
+						}
+						.into()
+					}),
+			])
+			.selected_index(Some(preferences.selection_mode as u32))
+			.widget_instance();
+			let selection_mode = vec![
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				selection_mode,
+			];
 
-		let selection_mode = RadioInput::new(vec![
-			RadioEntryData::new(SelectionMode::Touched.to_string())
-				.label(SelectionMode::Touched.to_string())
-				.tooltip_label(SelectionMode::Touched.to_string())
-				.tooltip_description(SelectionMode::Touched.tooltip_description())
-				.on_update(move |_| {
-					PreferencesMessage::SelectionMode {
-						selection_mode: SelectionMode::Touched,
-					}
-					.into()
-				}),
-			RadioEntryData::new(SelectionMode::Enclosed.to_string())
-				.label(SelectionMode::Enclosed.to_string())
-				.tooltip_label(SelectionMode::Enclosed.to_string())
-				.tooltip_description(SelectionMode::Enclosed.tooltip_description())
-				.on_update(move |_| {
-					PreferencesMessage::SelectionMode {
-						selection_mode: SelectionMode::Enclosed,
-					}
-					.into()
-				}),
-			RadioEntryData::new(SelectionMode::Directional.to_string())
-				.label(SelectionMode::Directional.to_string())
-				.tooltip_label(SelectionMode::Directional.to_string())
-				.tooltip_description(SelectionMode::Directional.tooltip_description())
-				.on_update(move |_| {
-					PreferencesMessage::SelectionMode {
-						selection_mode: SelectionMode::Directional,
-					}
-					.into()
-				}),
-		])
-		.selected_index(Some(preferences.selection_mode as u32))
-		.widget_instance();
-		let selection_mode = vec![
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			selection_mode,
-		];
+			rows.extend_from_slice(&[header, selection_label, selection_mode]);
+		}
+
+		// ==========
+		// UI
+		// ==========
+		#[cfg(not(target_family = "wasm"))]
+		{
+			let header = vec![TextLabel::new("UI").italic(true).widget_instance()];
+
+			let scale_description = "Adjust the scale of the user interface (100 is default).";
+			let scale_label = vec![
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				TextLabel::new("Scale").tooltip_label("Scale").tooltip_description(scale_description).widget_instance(),
+			];
+			let scale = vec![
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				NumberInput::new(Some(ui_scale_to_display(preferences.ui_scale)))
+					.tooltip_label("Scale")
+					.tooltip_description(scale_description)
+					.mode_range()
+					.int()
+					.min(ui_scale_to_display(UI_SCALE_MIN))
+					.max(ui_scale_to_display(UI_SCALE_MAX))
+					.unit("%")
+					.on_update(|number_input: &NumberInput| {
+						if let Some(display_value) = number_input.value {
+							let scale = map_display_to_ui_scale(display_value);
+							PreferencesMessage::UIScale { scale }.into()
+						} else {
+							PreferencesMessage::UIScale { scale: UI_SCALE_DEFAULT }.into()
+						}
+					})
+					.widget_instance(),
+			];
+
+			rows.extend_from_slice(&[header, scale_label, scale]);
+		}
 
 		// ============
 		// EXPERIMENTAL
 		// ============
+		{
+			let header = vec![TextLabel::new("Experimental").italic(true).widget_instance()];
 
-		let experimental_header = vec![TextLabel::new("Experimental").italic(true).widget_instance()];
+			let node_graph_section_description = "Configure the appearance of the wires running between node connections in the graph.";
+			let node_graph_wires_label = vec![
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				TextLabel::new("Node Graph Wires")
+					.tooltip_label("Node Graph Wires")
+					.tooltip_description(node_graph_section_description)
+					.widget_instance(),
+			];
+			let graph_wire_style = RadioInput::new(vec![
+				RadioEntryData::new(GraphWireStyle::Direct.to_string())
+					.label(GraphWireStyle::Direct.to_string())
+					.tooltip_label(GraphWireStyle::Direct.to_string())
+					.tooltip_description(GraphWireStyle::Direct.tooltip_description())
+					.on_update(move |_| PreferencesMessage::GraphWireStyle { style: GraphWireStyle::Direct }.into()),
+				RadioEntryData::new(GraphWireStyle::GridAligned.to_string())
+					.label(GraphWireStyle::GridAligned.to_string())
+					.tooltip_label(GraphWireStyle::GridAligned.to_string())
+					.tooltip_description(GraphWireStyle::GridAligned.tooltip_description())
+					.on_update(move |_| PreferencesMessage::GraphWireStyle { style: GraphWireStyle::GridAligned }.into()),
+			])
+			.selected_index(Some(preferences.graph_wire_style as u32))
+			.widget_instance();
+			let graph_wire_style = vec![
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				graph_wire_style,
+			];
 
-		let node_graph_section_description = "Configure the appearance of the wires running between node connections in the graph.";
-		let node_graph_wires_label = vec![
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			TextLabel::new("Node Graph Wires")
-				.tooltip_label("Node Graph Wires")
-				.tooltip_description(node_graph_section_description)
-				.widget_instance(),
-		];
-		let graph_wire_style = RadioInput::new(vec![
-			RadioEntryData::new(GraphWireStyle::Direct.to_string())
-				.label(GraphWireStyle::Direct.to_string())
-				.tooltip_label(GraphWireStyle::Direct.to_string())
-				.tooltip_description(GraphWireStyle::Direct.tooltip_description())
-				.on_update(move |_| PreferencesMessage::GraphWireStyle { style: GraphWireStyle::Direct }.into()),
-			RadioEntryData::new(GraphWireStyle::GridAligned.to_string())
-				.label(GraphWireStyle::GridAligned.to_string())
-				.tooltip_label(GraphWireStyle::GridAligned.to_string())
-				.tooltip_description(GraphWireStyle::GridAligned.tooltip_description())
-				.on_update(move |_| PreferencesMessage::GraphWireStyle { style: GraphWireStyle::GridAligned }.into()),
-		])
-		.selected_index(Some(preferences.graph_wire_style as u32))
-		.widget_instance();
-		let graph_wire_style = vec![
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			graph_wire_style,
-		];
+			let checkbox_id = CheckboxId::new();
+			let vello_description = "Use the experimental Vello renderer instead of SVG-based rendering.".to_string();
+			#[cfg(target_family = "wasm")]
+			let mut vello_description = vello_description;
+			#[cfg(target_family = "wasm")]
+			vello_description.push_str("\n\n(Your browser must support WebGPU.)");
 
-		let checkbox_id = CheckboxId::new();
-		let vello_description = "Use the experimental Vello renderer instead of SVG-based rendering.".to_string();
-		#[cfg(target_family = "wasm")]
-		let mut vello_description = vello_description;
-		#[cfg(target_family = "wasm")]
-		vello_description.push_str("\n\n(Your browser must support WebGPU.)");
+			let use_vello = vec![
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				CheckboxInput::new(preferences.use_vello && preferences.supports_wgpu())
+					.tooltip_label("Vello Renderer")
+					.tooltip_description(vello_description.clone())
+					.disabled(!preferences.supports_wgpu())
+					.on_update(|checkbox_input: &CheckboxInput| PreferencesMessage::UseVello { use_vello: checkbox_input.checked }.into())
+					.for_label(checkbox_id)
+					.widget_instance(),
+				TextLabel::new("Vello Renderer")
+					.tooltip_label("Vello Renderer")
+					.tooltip_description(vello_description)
+					.disabled(!preferences.supports_wgpu())
+					.for_checkbox(checkbox_id)
+					.widget_instance(),
+			];
 
-		let use_vello = vec![
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			CheckboxInput::new(preferences.use_vello && preferences.supports_wgpu())
-				.tooltip_label("Vello Renderer")
-				.tooltip_description(vello_description.clone())
-				.disabled(!preferences.supports_wgpu())
-				.on_update(|checkbox_input: &CheckboxInput| PreferencesMessage::UseVello { use_vello: checkbox_input.checked }.into())
-				.for_label(checkbox_id)
-				.widget_instance(),
-			TextLabel::new("Vello Renderer")
-				.tooltip_label("Vello Renderer")
-				.tooltip_description(vello_description)
-				.disabled(!preferences.supports_wgpu())
-				.for_checkbox(checkbox_id)
-				.widget_instance(),
-		];
-
-		let checkbox_id = CheckboxId::new();
-		let vector_mesh_description = "
+			let checkbox_id = CheckboxId::new();
+			let vector_mesh_description = "
 			Allow the Pen tool to produce branching geometry, where more than two segments may be connected to one anchor point.\n\
 			\n\
 			Currently, vector meshes do not properly render strokes (branching joins) and fills (multiple regions).
 			"
-		.trim();
-		let vector_meshes = vec![
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			CheckboxInput::new(preferences.vector_meshes)
-				.tooltip_label("Vector Meshes")
-				.tooltip_description(vector_mesh_description)
-				.on_update(|checkbox_input: &CheckboxInput| PreferencesMessage::VectorMeshes { enabled: checkbox_input.checked }.into())
-				.for_label(checkbox_id)
-				.widget_instance(),
-			TextLabel::new("Vector Meshes")
-				.tooltip_label("Vector Meshes")
-				.tooltip_description(vector_mesh_description)
-				.for_checkbox(checkbox_id)
-				.widget_instance(),
-		];
+			.trim();
+			let vector_meshes = vec![
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				CheckboxInput::new(preferences.vector_meshes)
+					.tooltip_label("Vector Meshes")
+					.tooltip_description(vector_mesh_description)
+					.on_update(|checkbox_input: &CheckboxInput| PreferencesMessage::VectorMeshes { enabled: checkbox_input.checked }.into())
+					.for_label(checkbox_id)
+					.widget_instance(),
+				TextLabel::new("Vector Meshes")
+					.tooltip_label("Vector Meshes")
+					.tooltip_description(vector_mesh_description)
+					.for_checkbox(checkbox_id)
+					.widget_instance(),
+			];
 
-		let checkbox_id = CheckboxId::new();
-		let brush_tool_description = "
+			let checkbox_id = CheckboxId::new();
+			let brush_tool_description = "
 			Enable the Brush tool to support basic raster-based layer painting.\n\
 			\n\
 			This legacy tool has performance and quality limitations and is slated for replacement in future versions of Graphite that will focus on raster graphics editing.
 			"
-		.trim();
-		let brush_tool = vec![
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			Separator::new(SeparatorType::Unrelated).widget_instance(),
-			CheckboxInput::new(preferences.brush_tool)
-				.tooltip_label("Brush Tool")
-				.tooltip_description(brush_tool_description)
-				.on_update(|checkbox_input: &CheckboxInput| PreferencesMessage::BrushTool { enabled: checkbox_input.checked }.into())
-				.for_label(checkbox_id)
-				.widget_instance(),
-			TextLabel::new("Brush Tool")
-				.tooltip_label("Brush Tool")
-				.tooltip_description(brush_tool_description)
-				.for_checkbox(checkbox_id)
-				.widget_instance(),
-		];
+			.trim();
+			let brush_tool = vec![
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				Separator::new(SeparatorType::Unrelated).widget_instance(),
+				CheckboxInput::new(preferences.brush_tool)
+					.tooltip_label("Brush Tool")
+					.tooltip_description(brush_tool_description)
+					.on_update(|checkbox_input: &CheckboxInput| PreferencesMessage::BrushTool { enabled: checkbox_input.checked }.into())
+					.for_label(checkbox_id)
+					.widget_instance(),
+				TextLabel::new("Brush Tool")
+					.tooltip_label("Brush Tool")
+					.tooltip_description(brush_tool_description)
+					.for_checkbox(checkbox_id)
+					.widget_instance(),
+			];
 
-		Layout(vec![
-			// NAVIGATION
-			LayoutGroup::Row { widgets: navigation_header },
-			// Navigation: Zoom Rate
-			LayoutGroup::Row { widgets: zoom_rate_label },
-			LayoutGroup::Row { widgets: zoom_rate },
-			// Navigation: Zoom with Scroll
-			LayoutGroup::Row { widgets: zoom_with_scroll },
-			//
-			// EDITING
-			LayoutGroup::Row { widgets: editing_header },
-			// Editing: Selection
-			LayoutGroup::Row { widgets: selection_label },
-			LayoutGroup::Row { widgets: selection_mode },
-			//
-			// EXPERIMENTAL
-			LayoutGroup::Row { widgets: experimental_header },
-			// Experimental: Node Graph Wires
-			LayoutGroup::Row { widgets: node_graph_wires_label },
-			LayoutGroup::Row { widgets: graph_wire_style },
-			// Experimental: Vello Renderer
-			LayoutGroup::Row { widgets: use_vello },
-			// Experimental: Vector Meshes
-			LayoutGroup::Row { widgets: vector_meshes },
-			// Experimental: Brush Tool
-			LayoutGroup::Row { widgets: brush_tool },
-		])
+			rows.extend_from_slice(&[header, node_graph_wires_label, graph_wire_style, use_vello, vector_meshes, brush_tool]);
+		}
+
+		Layout(rows.into_iter().map(|r| LayoutGroup::Row { widgets: r }).collect())
 	}
 
 	pub fn send_layout(&self, responses: &mut VecDeque<Message>, layout_target: LayoutTarget, preferences: &PreferencesMessageHandler) {
@@ -351,3 +374,13 @@ fn map_zoom_rate_to_display(rate: f64) -> f64 {
 	let display = 50. + distance_from_reference;
 	display.clamp(1., 100.).round()
 }
+
+/// Maps display values in percent to actual ui scale.
+fn map_display_to_ui_scale(display: f64) -> f64 {
+	display / 100.
+}
+
+/// Maps actual ui scale back to display values in percent.
+fn ui_scale_to_display(scale: f64) -> f64 {
+	scale * 100.
+}

editor/src/messages/frontend/frontend_message.rs

@@ -338,6 +338,9 @@ pub enum FrontendMessage {
 		width: f64,
 		height: f64,
 	},
+	UpdateUIScale {
+		scale: f64,
+	},
 
 	#[cfg(not(target_family = "wasm"))]
 	RenderOverlays {

editor/src/messages/preferences/preferences_message.rs

@@ -17,4 +17,5 @@ pub enum PreferencesMessage {
 	ModifyLayout { zoom_with_scroll: bool },
 	GraphWireStyle { style: GraphWireStyle },
 	ViewportZoomWheelRate { rate: f64 },
+	UIScale { scale: f64 },
 }

editor/src/messages/preferences/preferences_message_handler.rs

@@ -1,4 +1,4 @@
-use crate::consts::VIEWPORT_ZOOM_WHEEL_RATE;
+use crate::consts::{UI_SCALE_DEFAULT, VIEWPORT_ZOOM_WHEEL_RATE};
 use crate::messages::input_mapper::key_mapping::MappingVariant;
 use crate::messages::portfolio::document::utility_types::wires::GraphWireStyle;
 use crate::messages::preferences::SelectionMode;
@@ -14,6 +14,7 @@ pub struct PreferencesMessageHandler {
 	pub brush_tool: bool,
 	pub graph_wire_style: GraphWireStyle,
 	pub viewport_zoom_wheel_rate: f64,
+	pub ui_scale: f64,
 }
 
 impl PreferencesMessageHandler {
@@ -42,6 +43,7 @@ impl Default for PreferencesMessageHandler {
 			brush_tool: false,
 			graph_wire_style: GraphWireStyle::default(),
 			viewport_zoom_wheel_rate: VIEWPORT_ZOOM_WHEEL_RATE,
+			ui_scale: UI_SCALE_DEFAULT,
 		}
 	}
 }
@@ -61,6 +63,7 @@ impl MessageHandler<PreferencesMessage, ()> for PreferencesMessageHandler {
 				responses.add(PreferencesMessage::ModifyLayout {
 					zoom_with_scroll: self.zoom_with_scroll,
 				});
+				responses.add(FrontendMessage::UpdateUIScale { scale: self.ui_scale });
 			}
 			PreferencesMessage::ResetToDefaults => {
 				refresh_dialog(responses);
@@ -99,6 +102,10 @@ impl MessageHandler<PreferencesMessage, ()> for PreferencesMessageHandler {
 			PreferencesMessage::ViewportZoomWheelRate { rate } => {
 				self.viewport_zoom_wheel_rate = rate;
 			}
+			PreferencesMessage::UIScale { scale } => {
+				self.ui_scale = scale;
+				responses.add(FrontendMessage::UpdateUIScale { scale: self.ui_scale });
+			}
 		}
 
 		responses.add(FrontendMessage::TriggerSavePreferences { preferences: self.clone() });