import term.ui as tui const ( colors = [ tui.Color{33, 150, 243} tui.Color{0, 150, 136} tui.Color{205, 220, 57} tui.Color{255, 152, 0} tui.Color{244, 67, 54} tui.Color{156, 39, 176} ] ) struct Point { x int y int } struct App { mut: tui &tui.Context = 0 points []Point color tui.Color = colors[0] color_idx int cut_rate f64 = 5 } fn frame(x voidptr) { mut app := &App(x) app.tui.clear() if app.points.len > 0 { app.tui.set_bg_color(app.color) mut last := app.points[0] for point in app.points { // if the cursor moves quickly enough, different events are not // necessarily touching, so we need to draw a line between them app.tui.draw_line(last.x, last.y, point.x, point.y) last = point } app.tui.reset() l := int(app.points.len / app.cut_rate) + 1 app.points = app.points[l..].clone() } ww := app.tui.window_width app.tui.bold() app.tui.draw_text(ww / 6, 2, 'V term.input: cursor chaser demo') app.tui.draw_text((ww - ww / 6) - 14, 2, 'cut rate: ${(100 / app.cut_rate):3.0f}%') app.tui.horizontal_separator(3) app.tui.reset() app.tui.flush() } fn event(e &tui.Event, x voidptr) { mut app := &App(x) match e.typ { .key_down { match e.code { .escape { exit(0) } .space, .enter { app.color_idx++ if app.color_idx == colors.len { app.color_idx = 0 } app.color = colors[app.color_idx] } else {} } } .mouse_move, .mouse_drag, .mouse_down { app.points << Point{ e.x, e.y } } .mouse_scroll { d := if e.direction == .up { 0.1 } else { -0.1 } app.cut_rate += d if app.cut_rate < 1 { app.cut_rate = 1 } } else {} } } mut app := &App{} app.tui = tui.init( user_data: app, frame_fn: frame, event_fn: event, hide_cursor: true ) app.tui.run()