rt-thread-official/examples/gui/demo_view_scrollbar.c

#include "demo_view.h"
#include <rtgui/rtgui_system.h>
#include <rtgui/widgets/label.h>
#include <rtgui/widgets/scrollbar.h>

rtgui_container_t *demo_view_scrollbar(void)
{
	rtgui_container_t *container;
	rtgui_rect_t rect;
	rtgui_label_t *label;
	rtgui_scrollbar_t* hbar;
	rtgui_scrollbar_t* vbar;

	/* create a demo container */
	container = demo_view("ScrollBar View");

	/* get demo container rect */
	demo_view_get_rect(container, &rect);
	label = rtgui_label_create("horizontal bar:");
	rtgui_container_add_child(container, RTGUI_WIDGET(label));
	rect.x1 += 5; rect.x2 -= 5;
	rect.y1 += 5; rect.y2 = rect.y1 + 18;
	rtgui_widget_set_rect(RTGUI_WIDGET(label), &rect);
	rect.y1 += 20; rect.y2 = rect.y1 + 18;
	hbar = rtgui_scrollbar_create(RTGUI_HORIZONTAL, &rect);
	rtgui_container_add_child(container, RTGUI_WIDGET(hbar));

	/* get demo container rect */
	demo_view_get_rect(container, &rect);
	label = rtgui_label_create("vertical bar:");
	rtgui_container_add_child(container, RTGUI_WIDGET(label));
	rect.x1 += 5; rect.x2 -= 5;
	rect.y1 += 45; rect.y2 = rect.y1 + 18;
	rtgui_widget_set_rect(RTGUI_WIDGET(label), &rect);
	rect.x1 += 110; rect.x2 = rect.x1 + 20;
	rect.y1 += 18 + 5; rect.y2 = rect.y1 + 150;
	vbar = rtgui_scrollbar_create(RTGUI_VERTICAL, &rect);
	rtgui_container_add_child(container, RTGUI_WIDGET(vbar));
	rtgui_scrollbar_set_line_step(vbar, 1);
	// RTGUI_WIDGET_DISABLE(RTGUI_WIDGET(vbar));

	return container;
}