// simple button
if (gui.button("Cancel"))
	do_cancel_action();

	int mouse_x, mouse_y;

	uint keysPressed = handle_input(x, y);
	int w, h;
	SDL_GetWindowSize(gWindow, &w, &h);
	ui.set_text_align(ALIGN_LEFT);

	ui.begin_frame(w, h, x, y, -mouse_wheel, last_char, keysPressed);
	last_char = 0;
	mouse_wheel = 0;

	ui.begin_rollout(rollout);
	static bool collapsed = false;
	if (ui.collapse("Collapse", collapsed))
		collapsed = !collapsed;

	if (!collapsed) {
		ui.indent();
		ui.button("Button1");
		ui.button("Button2");
		ui.button("Button3");
		ui.button("Button4");
		ui.separator(true);

		static char combo_value[100] = "Item1";
		if (ui.combo("Combo Box", combo_value)) {
			if (ui.combo_item("Item1"))
				strcpy(combo_value, "Item1");
			if (ui.combo_item("Item2"))
				strcpy(combo_value, "Item2");
			if (ui.combo_item("Item3"))
				strcpy(combo_value, "Item3");
			if (ui.combo_item("Item4"))
				strcpy(combo_value, "Item4");
		}
		ui.separator();

		static bool checked = false;
		if (ui.check("Checkbox", checked))
			checked = !checked;

		ui.separator(true);
		ui.texture("texture.jpg");
		ui.rectangle(100);
		ui.texture(nullptr);

		ui.separator();
		ui.separator(true);
		ui.label("Edit text");
		static char edit_value[256];
		bool edit_finished = false;
		ui.edit(edit_value, 256, &edit_finished);
		ui.separator(true);

		ui.label("Label");
		ui.value("Value");
		static float val = 1.0f;
		ui.slider("Slider", &val, 0.0f, 10.0f, 1.0f);

		ui.separator(true);
		ui.label("Progress bar");
		static float progress = 7.0f;
		ui.progress(progress, 0.0f, 10.0f, 1.0f);

		ui.row(3);
		ui.button("Item1");
		ui.button("Item2");
		ui.button("Item3");
		ui.end_row();

		static char str_property[100] = "Property Val";
		ui.property("Property", str_property, 100, NULL);
		ui.draw_text(5, 5, 0, "Draw item", 0xffffffff);

		ui.unindent();
	}
	ui.end_rollout();

	ui.begin_rollout(vert_rollout);

	char str[100];
	static int selected = -1;
	for (int i = 0; i < 100; ++i) {
		sprintf(str, "item %d", i);
		if (ui.item(str, i == selected))
			selected = i;
	}

	ui.end_rollout();

	ui.end_frame();