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