Initial project import

tools/v/examples/gg/moving_square.v

@@ -0,0 +1,34 @@
+import gg
+
+struct App {
+mut:
+	x f64 = 100.0
+	y f64 = 100.0
+}
+
+mut app := &App{}
+gg.start(
+	window_title: 'Moving Square'
+	width:        640
+	height:       480
+	update_fn:    fn [mut app] (dt f32, ctx &gg.Context) {
+		println(' frame: ${ctx.frame:6} | dt: ${dt:9.6f}s')
+		if ctx.pressed_keys[gg.KeyCode.right] {
+			app.x = app.x + 200 * dt
+		}
+		if ctx.pressed_keys[gg.KeyCode.left] {
+			app.x = app.x - 200 * dt
+		}
+		if ctx.pressed_keys[gg.KeyCode.down] {
+			app.y = app.y + 200 * dt
+		}
+		if ctx.pressed_keys[gg.KeyCode.up] {
+			app.y = app.y - 200 * dt
+		}
+	}
+	frame_fn:     fn [mut app] (ctx &gg.Context) {
+		ctx.begin()
+		ctx.draw_rect_filled(int(app.x), int(app.y), 50, 50, gg.red)
+		ctx.end()
+	}
+)