add buffer animation demo.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@691 bbd45198-f89e-11dd-88c7-29a3b14d5316

3 files changed, 126 insertions, 0 deletions

diff --git a/examples/gui/SConscript b/examples/gui/SConscript
index fd84f72d9a..87fbfdb291 100644
--- a/examples/gui/SConscript
+++ b/examples/gui/SConscript
@@ -7,6 +7,7 @@ demo_listview.c
 demo_panel_single.c

 demo_view.c

 demo_view_animation.c

+demo_view_buffer_animation.c

 demo_view_box.c

 demo_view_button.c

 demo_view_checkbox.c

diff --git a/examples/gui/demo_view_buffer_animation.c b/examples/gui/demo_view_buffer_animation.c
new file mode 100644
index 0000000000..51a4e425de
--- /dev/null
+++ b/examples/gui/demo_view_buffer_animation.c
@@ -0,0 +1,124 @@
+#include <rtgui/dc.h>

+#include <rtgui/rtgui_system.h>

+#include <rtgui/widgets/view.h>

+#include "demo_view.h"

+

+/*

+ * ֱ����DC�ϻ�ͼ��ʵ�ֶ���Ч��

+ *

+ * �����������ڶ�ʱ�������ģ������·�����ʾ����

+ * "�����ҷ�"

+ */

+static rt_int8_t dx = 1, dy = 1;

+static rtgui_rect_t text_rect;

+static rtgui_timer_t *timer;

+static struct rtgui_dc *dc_buffer;

+static void timeout(struct rtgui_timer* timer, void* parameter)

+{

+	struct rtgui_dc* dc;

+	rtgui_rect_t rect;

+	rtgui_widget_t *widget;

+

+	/* �ؼ�(view)ͨ��parameter�������ݸ���ʱ�� */

+	widget = (rtgui_widget_t*)parameter;

+

+	/* ��ÿؼ�������DC */

+	dc = rtgui_dc_begin_drawing(widget);

+	if (dc == RT_NULL) /* ��������������DC�����أ�����ؼ��򸸿ؼ�������״̬��DC�ǻ�ȡ���ɹ��ģ� */

+		return ;

+

+	/* ���demo view������ͼ��������Ҫ�����жϱ߽� */

+	demo_view_get_rect(RTGUI_VIEW(widget), &rect);

+	rect.y2 -= 5;

+

+	/* �ж��Ƿ��ǵ�һ�λ�ͼ */

+	if ((text_rect.x1 == 0) && (text_rect.y1 == 0))

+	{

+		rtgui_rect_moveto(&text_rect, rect.x1, rect.y1);

+	}

+

+    /* ����dx��dy */

+	if (text_rect.x2 >= rect.x2) dx = -1;

+	if (text_rect.x1 < rect.x1)  dx = 1;

+	if (text_rect.y2 >= rect.y2) dy = -1;

+	if (text_rect.y1 < rect.y1) dy = 1;

+

+    /* �ƶ��ı����λ�� */

+	text_rect.x1 += dx; text_rect.x2 += dx;

+	text_rect.y1 += dy; text_rect.y2 += dy;

+

+    /* ��ͼ */

+	rect = text_rect;

+	rect.x2 += 2; rect.y2 += 2;

+	rtgui_dc_blit(dc_buffer, NULL, dc, &rect);

+

+	/* ��ͼ��� */

+	rtgui_dc_end_drawing(dc);

+}

+

+static rt_bool_t animation_event_handler(rtgui_widget_t* widget, rtgui_event_t *event)

+{

+	if (event->type == RTGUI_EVENT_PAINT)

+	{

+		struct rtgui_dc* dc;

+		rtgui_rect_t rect;

+

+		/* ��Ϊ�õ���demo view�����汾����һ���ֿؼ��������ڻ�ͼʱ��Ҫ��demo view�Ȼ�ͼ */

+		rtgui_view_event_handler(widget, event);

+

+		/* ��ÿؼ�������DC */

+		dc = rtgui_dc_begin_drawing(widget);

+		if (dc == RT_NULL) /* ��������������DC�����أ�����ؼ��򸸿ؼ�������״̬��DC�ǻ�ȡ���ɹ��ģ� */

+			return RT_FALSE;

+

+        /* ���demo view������ͼ������ */

+        demo_view_get_rect(RTGUI_VIEW(widget), &rect);

+

+		/* ��ͼ */

+		rect = text_rect;

+		rtgui_rect_inflate(&rect, +1);

+		rtgui_dc_blit(dc_buffer, NULL, dc, &rect);

+

+		/* ��ͼ��� */

+		rtgui_dc_end_drawing(dc);

+	}

+	else

+	{

+		/* ����Ĭ�ϵ��¼��������� */

+		return rtgui_view_event_handler(widget, event);

+	}

+

+	return RT_FALSE;

+}

+

+rtgui_view_t *demo_view_buffer_animation(rtgui_workbench_t* workbench)

+{

+	rtgui_view_t *view;

+

+	view = demo_view(workbench, "DC ����");

+	if (view != RT_NULL)

+		rtgui_widget_set_event_handler(RTGUI_WIDGET(view), animation_event_handler);

+

+	rtgui_font_get_metrics(RTGUI_WIDGET_FONT(RTGUI_WIDGET(view)), "�����ҷ�", &text_rect);

+	if (dc_buffer == RT_NULL)

+	{

+		rtgui_rect_t rect;

+

+		rect.x1 = 0; rect.x2 = rtgui_rect_width(text_rect) + 2;

+		rect.y1 = 0; rect.y2 = rtgui_rect_height(text_rect) + 2;

+

+		/* ���� DC Buffer���� 50���� 50 */

+		dc_buffer = rtgui_dc_buffer_create(rtgui_rect_width(rect), rtgui_rect_height(rect));

+		RTGUI_DC_FC(dc_buffer) = RTGUI_WIDGET_BACKGROUND(RTGUI_WIDGET(view));

+		rtgui_dc_fill_rect(dc_buffer, &rect);

+		RTGUI_DC_FC(dc_buffer) = black;

+		rect.x1 = 1; rect.y1 = 1;

+		rtgui_dc_draw_text(dc_buffer, "�����ҷ�", &rect);

+	}

+

+	/* ������ʱ���Դ������� */

+	timer = rtgui_timer_create(2, RT_TIMER_FLAG_PERIODIC, timeout, (void*)view);

+	rtgui_timer_start(timer);

+

+	return view;

+}

diff --git a/examples/gui/demo_workbench.c b/examples/gui/demo_workbench.c
index 88d84c7f5b..53a9e07abc 100644
--- a/examples/gui/demo_workbench.c
+++ b/examples/gui/demo_workbench.c
@@ -54,6 +54,7 @@ static void workbench_entry(void* parameter)
 	demo_view_dc(workbench);
 	demo_view_dc_buffer(workbench);
 	demo_view_animation(workbench);
+	demo_view_buffer_animation(workbench);
 	demo_view_window(workbench);
 	demo_view_label(workbench);
 	demo_view_button(workbench);