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use egui::{
Align, Align2, Color32, Context, FontId, Frame, Image, Layout, Margin, PointerButton, Pos2,
Rect, Rgba, Sense, TextStyle, TopBottomPanel, Vec2, ViewportCommand, vec2,
};
use crate::{TitleBar, titlebar::control_buttons::WindowControlIcon};
/// Get the title bar height based on the platform.
/// - macOS: 28.0 pixels (thinner title bar)
/// - Windows/Linux: 32.0 pixels (standard title bar)
pub fn title_bar_height() -> f32 {
#[cfg(target_os = "macos")]
{
28.0
}
#[cfg(not(target_os = "macos"))]
{
32.0
}
}
impl TitleBar {
/// Display the title bar in the egui context
///
/// This is the main method to render the title bar. It automatically
/// chooses the appropriate rendering method based on the platform:
/// - macOS: Uses native traffic light buttons
/// - Windows/Linux: Uses generic window control buttons
///
/// # Arguments
/// * `ctx` - The egui context
///
/// # Examples
///
/// ```rust
/// fn update(&mut self, ctx: &Context, frame: &mut eframe::Frame) {
/// self.title_bar.show(ctx);
///
/// CentralPanel::default().show(ctx, |ui| {
/// ui.label("Main content");
/// });
/// }
/// ```
pub fn show(&mut self, ctx: &Context) {
#[cfg(target_os = "macos")]
{
self.render_macos_title_bar(ctx);
}
#[cfg(not(target_os = "macos"))]
{
self.render_generic_title_bar(ctx);
}
}
/// Render a macOS-style title bar with traffic light controls.
pub fn render_macos_title_bar(&mut self, ctx: &Context) {
let content_rect = ctx.content_rect();
if content_rect.width() < 100.0 || content_rect.height() < 100.0 {
return;
}
TopBottomPanel::top(self.id)
.exact_height(28.0)
.frame(
Frame::new()
.fill(self.background_color)
.inner_margin(Margin::same(0))
.outer_margin(Margin::same(0)),
)
.show(ctx, |ui| {
let title_bar_rect = ui.available_rect_before_wrap();
if title_bar_rect.width() <= 0.0 || title_bar_rect.height() <= 0.0 {
return;
}
let title_bar_response =
ui.interact(title_bar_rect, self.id, Sense::click_and_drag());
if title_bar_response.drag_started_by(PointerButton::Primary) {
ctx.send_viewport_cmd(ViewportCommand::StartDrag);
}
if title_bar_response.double_clicked() {
let is_maximized = ctx.input(|i| i.viewport().maximized.unwrap_or(false));
ctx.send_viewport_cmd(ViewportCommand::Maximized(!is_maximized));
}
ui.horizontal(|ui| {
ui.with_layout(Layout::left_to_right(Align::Center), |ui| {
let is_fullscreen =
ui.ctx().input(|i| i.viewport().fullscreen.unwrap_or(false));
if is_fullscreen {
// No need to render traffic light controls in fullscreen mode
// Just render menu items instead
return self.render_menu_items(ui, ctx);
}
// Save spacing to restore after rendering is done.
// We'll use custom spacing so reset current one to be 0
let prev_spacing = ui.spacing().item_spacing;
ui.spacing_mut().item_spacing = Vec2::ZERO;
let spacing_size = 8.0;
ui.add_space(spacing_size);
// Figure out traffic lights zone geometry
let controls_start = Pos2::new(ui.cursor().min.x, spacing_size);
let buttons_count = 3.0;
let button_size = 12.0;
let spacings_count = 2.0;
let buttons_width = buttons_count * button_size;
let spacing_width = spacings_count * spacing_size;
let controls_width = buttons_width + spacing_width;
let controls_height = button_size;
let rect = Rect::from_min_size(
controls_start,
vec2(controls_width, controls_height),
);
// Check if traffic lights controls are hovered.
// In this case buttons should be 'active' even in case of not focused window
let controls_hovered = ui
.ctx()
.input(|i| i.pointer.latest_pos().map_or(false, |p| rect.contains(p)));
let window_active =
ui.ctx().input(|i| i.viewport().focused.unwrap_or(true));
let colored = controls_hovered || window_active;
let show_icons = controls_hovered;
// Figure out inactive color depending on luminance of titlebar
let rgba: Rgba = self.background_color.into();
let luminance = 0.2126 * rgba.r() + 0.7152 * rgba.g() + 0.0722 * rgba.b();
let inactive_color = if luminance < 0.55 {
Color32::from_rgb(120, 120, 120)
} else {
Color32::from_rgb(220, 220, 220)
};
let close_background_color = if colored {
Color32::from_rgb(255, 95, 87)
} else {
inactive_color
};
let close_icon_color = Color32::from_rgb(115, 0, 0);
let close_response = self.render_traffic_light(
ui,
close_background_color,
show_icons.then(|| WindowControlIcon::Close),
close_icon_color,
button_size,
);
if close_response.clicked() {
ctx.send_viewport_cmd(ViewportCommand::Close);
}
ui.add_space(spacing_size);
let miniaturize_background_color = if colored {
Color32::from_rgb(255, 189, 46)
} else {
inactive_color
};
let miniaturize_icon_color = Color32::from_rgb(152, 85, 1);
let miniaturize_response = self.render_traffic_light(
ui,
miniaturize_background_color,
show_icons.then(|| WindowControlIcon::Minimize),
miniaturize_icon_color,
button_size,
);
if miniaturize_response.clicked() {
ctx.send_viewport_cmd(ViewportCommand::Minimized(true));
}
ui.add_space(spacing_size);
let zoom_background_color = if colored {
Color32::from_rgb(40, 201, 55)
} else {
inactive_color
};
let zoom_icon_color = Color32::from_rgb(0, 97, 0);
let option_down = ui.ctx().input(|i| i.modifiers.alt);
if option_down {
let is_maximized =
ui.ctx().input(|i| i.viewport().maximized.unwrap_or(false));
let zoom_response = self.render_traffic_light(
ui,
zoom_background_color,
show_icons.then(|| WindowControlIcon::Restore),
zoom_icon_color,
button_size,
);
if zoom_response.clicked() {
// Handle classic zoom (Option-click)
ui.ctx()
.send_viewport_cmd(ViewportCommand::Maximized(!is_maximized));
}
} else {
let is_fullscreen =
ui.ctx().input(|i| i.viewport().fullscreen.unwrap_or(false));
let zoom_response = self.render_traffic_light(
ui,
zoom_background_color,
show_icons.then(|| WindowControlIcon::Maximize),
zoom_icon_color,
button_size,
);
if zoom_response.clicked() {
// Handle zoom (fullscreen case)
ui.ctx()
.send_viewport_cmd(ViewportCommand::Fullscreen(!is_fullscreen));
}
}
// Add a bit more space after traffic light controls
ui.add_space(spacing_size);
ui.add_space(spacing_size);
// Restore previous spacing configuration
ui.spacing_mut().item_spacing = prev_spacing;
self.render_menu_items(ui, ctx);
});
ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
self.render_custom_icons(ui);
ui.add_space(8.0);
});
});
if let Some(ref title_text) = self.title {
if self.should_show_title() {
let font = TextStyle::Body.resolve(ui.style());
let galley = ui.fonts_mut(|f| {
f.layout_no_wrap(title_text.clone(), font, self.title_color)
});
let center_x = title_bar_rect.center().x;
let center_y = title_bar_rect.min.y + 14.0;
let title_pos = Pos2::new(
center_x - galley.size().x / 2.0,
center_y - galley.size().y / 2.0,
);
ui.painter().galley(title_pos, galley, self.title_color);
}
}
});
self.render_submenu(ctx);
}
/// Render a platform-generic title bar (Windows/Linux-style).
pub fn render_generic_title_bar(&mut self, ctx: &Context) {
let content_rect = ctx.content_rect();
if content_rect.width() < 100.0 || content_rect.height() < 100.0 {
return;
}
TopBottomPanel::top(self.id)
.exact_height(32.0)
.frame(
Frame::new()
.fill(self.background_color)
.inner_margin(Margin::same(0))
.outer_margin(Margin::same(0)),
)
.show(ctx, |ui| {
let title_bar_rect = ui.available_rect_before_wrap();
if title_bar_rect.width() <= 0.0 || title_bar_rect.height() <= 0.0 {
return;
}
let title_bar_response =
ui.interact(title_bar_rect, self.id, Sense::click_and_drag());
if title_bar_response.drag_started_by(PointerButton::Primary) {
ctx.send_viewport_cmd(ViewportCommand::StartDrag);
}
if title_bar_response.double_clicked() {
let is_maximized = ctx.input(|i| i.viewport().maximized.unwrap_or(false));
ctx.send_viewport_cmd(ViewportCommand::Maximized(!is_maximized));
}
ui.horizontal(|ui| {
ui.with_layout(Layout::left_to_right(Align::Center), |ui| {
let icon_size = 20.0;
let title_bar_height = 32.0;
let icon_center_y = title_bar_height / 2.0;
let icon_response = ui.allocate_rect(
Rect::from_center_size(
Pos2::new(16.0, icon_center_y),
Vec2::new(icon_size, icon_size),
),
Sense::click(),
);
ui.put(
icon_response.rect,
Image::new(self.get_app_icon())
.fit_to_exact_size(Vec2::new(icon_size, icon_size)),
);
if let Some(ref title) = self.title {
if self.should_show_title() {
let title_width = ui.fonts_mut(|f| {
f.layout_no_wrap(
title.clone(),
FontId::proportional(self.title_font_size),
self.title_color,
)
.size()
.x
}) + 8.0;
let title_response = ui.allocate_response(
Vec2::new(title_width, 32.0),
Sense::hover(),
);
let painter = ui.painter();
painter.text(
Pos2::new(title_response.rect.left() + 4.0, icon_center_y),
Align2::LEFT_CENTER,
title,
FontId::proportional(self.title_font_size),
self.title_color,
);
}
}
self.render_menu_items(ui, ctx);
});
ui.with_layout(Layout::right_to_left(Align::Center), |ui| {
ui.spacing_mut().item_spacing = Vec2::ZERO;
let close_response = self
.render_window_control_button_with_drawn_icon(
ui,
WindowControlIcon::Close,
self.close_hover_color,
self.close_icon_color,
16.0,
)
.on_hover_text("Close");
if close_response.clicked() {
ctx.send_viewport_cmd(ViewportCommand::Close);
}
let is_maximized = ctx.input(|i| i.viewport().maximized.unwrap_or(false));
let maximize_response = self
.render_window_control_button_with_drawn_icon(
ui,
if is_maximized {
WindowControlIcon::Restore
} else {
WindowControlIcon::Maximize
},
self.hover_color,
if is_maximized {
self.restore_icon_color
} else {
self.maximize_icon_color
},
14.0,
)
.on_hover_text(if is_maximized { "Restore" } else { "Maximize" });
if maximize_response.clicked() {
ctx.send_viewport_cmd(ViewportCommand::Maximized(!is_maximized));
}
let minimize_response = self
.render_window_control_button_with_drawn_icon(
ui,
WindowControlIcon::Minimize,
self.hover_color,
self.minimize_icon_color,
14.0,
)
.on_hover_text("Minimize");
if minimize_response.clicked() {
ctx.send_viewport_cmd(ViewportCommand::Minimized(true));
}
self.render_custom_icons(ui);
});
});
});
self.render_submenu(ctx);
}
}