use imgui::{FontGlyphRange, ImFontConfig, ImGui, ImGuiMouseCursor, Ui}; use std::time::Instant; #[derive(Copy, Clone, PartialEq, Debug, Default)] struct MouseState { pos: (i32, i32), pressed: (bool, bool, bool), wheel: f32, } pub fn run bool>(title: String, clear_color: [f32; 4], mut run_ui: F) { use glium::glutin; use glium::{Display, Surface}; use imgui_glium_renderer::Renderer; let mut events_loop = glutin::EventsLoop::new(); let context = glutin::ContextBuilder::new().with_vsync(true); let window = glutin::WindowBuilder::new() .with_title(title) .with_dimensions(1024, 768); let display = Display::new(window, context, &events_loop).unwrap(); let mut imgui = ImGui::init(); imgui.set_ini_filename(None); let config = ImFontConfig::new() .oversample_h(1) .pixel_snap_h(true) .size_pixels(13.0); config.rasterizer_multiply(1.75).add_font( &mut imgui.fonts(), include_bytes!("../mplus-1p-regular.ttf"), &FontGlyphRange::japanese(), ); config.merge_mode(true).add_default_font(&mut imgui.fonts()); let mut renderer = Renderer::init(&mut imgui, &display).expect("Failed to initialize renderer"); configure_keys(&mut imgui); let mut last_frame = Instant::now(); let mut mouse_state = MouseState::default(); let mut quit = false; loop { events_loop.poll_events(|event| { use glium::glutin::ElementState::Pressed; use glium::glutin::WindowEvent::*; use glium::glutin::{Event, MouseButton, MouseScrollDelta, TouchPhase}; if let Event::WindowEvent { event, .. } = event { match event { Closed => quit = true, KeyboardInput { input, .. } => { use glium::glutin::VirtualKeyCode as Key; let pressed = input.state == Pressed; match input.virtual_keycode { Some(Key::Tab) => imgui.set_key(0, pressed), Some(Key::Left) => imgui.set_key(1, pressed), Some(Key::Right) => imgui.set_key(2, pressed), Some(Key::Up) => imgui.set_key(3, pressed), Some(Key::Down) => imgui.set_key(4, pressed), Some(Key::PageUp) => imgui.set_key(5, pressed), Some(Key::PageDown) => imgui.set_key(6, pressed), Some(Key::Home) => imgui.set_key(7, pressed), Some(Key::End) => imgui.set_key(8, pressed), Some(Key::Delete) => imgui.set_key(9, pressed), Some(Key::Back) => imgui.set_key(10, pressed), Some(Key::Return) => imgui.set_key(11, pressed), Some(Key::Escape) => imgui.set_key(12, pressed), Some(Key::A) => imgui.set_key(13, pressed), Some(Key::C) => imgui.set_key(14, pressed), Some(Key::V) => imgui.set_key(15, pressed), Some(Key::X) => imgui.set_key(16, pressed), Some(Key::Y) => imgui.set_key(17, pressed), Some(Key::Z) => imgui.set_key(18, pressed), Some(Key::LControl) | Some(Key::RControl) => { imgui.set_key_ctrl(pressed) } Some(Key::LShift) | Some(Key::RShift) => imgui.set_key_shift(pressed), Some(Key::LAlt) | Some(Key::RAlt) => imgui.set_key_alt(pressed), Some(Key::LWin) | Some(Key::RWin) => imgui.set_key_super(pressed), _ => {} } } CursorMoved { position: (x, y), .. } => mouse_state.pos = (x as i32, y as i32), MouseInput { state, button, .. } => match button { MouseButton::Left => mouse_state.pressed.0 = state == Pressed, MouseButton::Right => mouse_state.pressed.1 = state == Pressed, MouseButton::Middle => mouse_state.pressed.2 = state == Pressed, _ => {} }, MouseWheel { delta: MouseScrollDelta::LineDelta(_, y), phase: TouchPhase::Moved, .. } | MouseWheel { delta: MouseScrollDelta::PixelDelta(_, y), phase: TouchPhase::Moved, .. } => mouse_state.wheel = y, ReceivedCharacter(c) => imgui.add_input_character(c), _ => (), } } }); let now = Instant::now(); let delta = now - last_frame; let delta_s = delta.as_secs() as f32 + delta.subsec_nanos() as f32 / 1_000_000_000.0; last_frame = now; update_mouse(&mut imgui, &mut mouse_state); let gl_window = display.gl_window(); let mouse_cursor = imgui.mouse_cursor(); if imgui.mouse_draw_cursor() || mouse_cursor == ImGuiMouseCursor::None { // Hide OS cursor gl_window .set_cursor_state(glutin::CursorState::Hide) .unwrap(); } else { // Set OS cursor gl_window .set_cursor_state(glutin::CursorState::Normal) .unwrap(); gl_window.set_cursor(match mouse_cursor { ImGuiMouseCursor::None => unreachable!("mouse_cursor was None!"), ImGuiMouseCursor::Arrow => glutin::MouseCursor::Arrow, ImGuiMouseCursor::TextInput => glutin::MouseCursor::Text, ImGuiMouseCursor::Move => glutin::MouseCursor::Move, ImGuiMouseCursor::ResizeNS => glutin::MouseCursor::NsResize, ImGuiMouseCursor::ResizeEW => glutin::MouseCursor::EwResize, ImGuiMouseCursor::ResizeNESW => glutin::MouseCursor::NeswResize, ImGuiMouseCursor::ResizeNWSE => glutin::MouseCursor::NwseResize, }); } let size_pixels = gl_window.get_inner_size().unwrap(); let hdipi = gl_window.hidpi_factor(); let size_points = ( (size_pixels.0 as f32 / hdipi) as u32, (size_pixels.1 as f32 / hdipi) as u32, ); let ui = imgui.frame(size_points, size_pixels, delta_s); if !run_ui(&ui) { break; } let mut target = display.draw(); target.clear_color( clear_color[0], clear_color[1], clear_color[2], clear_color[3], ); renderer.render(&mut target, ui).expect("Rendering failed"); target.finish().unwrap(); if quit { break; } } } fn configure_keys(imgui: &mut ImGui) { use imgui::ImGuiKey; imgui.set_imgui_key(ImGuiKey::Tab, 0); imgui.set_imgui_key(ImGuiKey::LeftArrow, 1); imgui.set_imgui_key(ImGuiKey::RightArrow, 2); imgui.set_imgui_key(ImGuiKey::UpArrow, 3); imgui.set_imgui_key(ImGuiKey::DownArrow, 4); imgui.set_imgui_key(ImGuiKey::PageUp, 5); imgui.set_imgui_key(ImGuiKey::PageDown, 6); imgui.set_imgui_key(ImGuiKey::Home, 7); imgui.set_imgui_key(ImGuiKey::End, 8); imgui.set_imgui_key(ImGuiKey::Delete, 9); imgui.set_imgui_key(ImGuiKey::Backspace, 10); imgui.set_imgui_key(ImGuiKey::Enter, 11); imgui.set_imgui_key(ImGuiKey::Escape, 12); imgui.set_imgui_key(ImGuiKey::A, 13); imgui.set_imgui_key(ImGuiKey::C, 14); imgui.set_imgui_key(ImGuiKey::V, 15); imgui.set_imgui_key(ImGuiKey::X, 16); imgui.set_imgui_key(ImGuiKey::Y, 17); imgui.set_imgui_key(ImGuiKey::Z, 18); } fn update_mouse(imgui: &mut ImGui, mouse_state: &mut MouseState) { let scale = imgui.display_framebuffer_scale(); imgui.set_mouse_pos( mouse_state.pos.0 as f32 / scale.0, mouse_state.pos.1 as f32 / scale.1, ); imgui.set_mouse_down(&[ mouse_state.pressed.0, mouse_state.pressed.1, mouse_state.pressed.2, false, false, ]); imgui.set_mouse_wheel(mouse_state.wheel / scale.1); mouse_state.wheel = 0.0; }