[gui]add example

components/gui/Kconfig

@@ -72,6 +72,10 @@ config RTGUI_IMAGE_CONTAINER
     bool "Use image container"
     default n
     
+config RTGUI_USING_DEMO
+    bool "Display an example of GUI"
+    default n
+    
 endif
 
 endmenu

components/gui/example/SConscript

@@ -0,0 +1,10 @@
+from building import *
+
+cwd = GetCurrentDir()
+src = Glob('*.c')
+
+CPPPATH = [cwd]
+
+group = DefineGroup('gui_demo', src, depend = ['RTGUI_USING_DEMO'], CPPPATH = CPPPATH)
+
+Return('group')

components/gui/example/gui_demo.c

@@ -0,0 +1,144 @@
+#include <rtthread.h>
+
+#if defined(RT_USING_GUIENGINE) && defined(RTGUI_USING_DEMO)
+
+#include <rtgui/rtgui.h>
+#include <rtgui/rtgui_system.h>
+#include <rtgui/rtgui_app.h>
+#include <rtgui/image.h>
+#include <rtgui/widgets/window.h>
+#include <rtgui/dc.h>
+
+#include "gui_demo.h"
+
+static rt_bool_t show_demo(struct rtgui_win *win)
+{
+    struct rtgui_dc *dc;
+    rtgui_rect_t rect;
+
+    dc = rtgui_dc_begin_drawing(RTGUI_WIDGET(win));
+    if (dc == RT_NULL)
+    {
+        rt_kprintf("dc is null \n");
+        return RT_FALSE;
+    }
+    rtgui_dc_get_rect(dc, &rect);
+
+    /* draw circular */
+    {
+        rt_int16_t x, y, r;
+
+        x = rect.x2 / 2 / 2;
+        y = rect.y2 / 2 / 2;
+        r = x > y ? y : x;
+        r -= y / 10;
+        rtgui_dc_draw_circle(dc, x, y, r);
+    }
+
+    /* draw image */
+    {
+        rtgui_rect_t draw_rect;
+        struct rtgui_image *img;
+
+        img = rtgui_image_create_from_mem("png", _picture_png, sizeof(_picture_png), RT_TRUE);
+        if (img != RT_NULL)
+        {
+            draw_rect.x1 = rect.x2 / 2 + (rect.x2 / 2 - img->w) / 2;
+            draw_rect.y1 = (rect.y2 / 2 - img->h) / 2;
+            draw_rect.x2 = draw_rect.x1 + img->w;
+            draw_rect.y2 = draw_rect.y1 + img->h;
+            rtgui_image_blit(img, dc, &draw_rect);
+        }
+    }
+
+    /* draw text */
+    {
+        rtgui_color_t fc;
+        rtgui_rect_t draw_rect;
+        char *text_buf = "Hello RT-thread!";
+
+        fc = RTGUI_DC_FC(dc);
+        RTGUI_DC_FC(dc) = RED;
+        draw_rect.x1 = rect.x2 * 2 / 5;
+        draw_rect.y1 = rect.y2 * 3 / 4;
+        draw_rect.x2 = rect.x2;
+        draw_rect.y2 = rect.y2;
+        rtgui_dc_draw_text(dc, text_buf, &draw_rect);
+        RTGUI_DC_FC(dc) = fc;
+    }
+
+    rtgui_dc_end_drawing(dc, RT_TRUE);
+
+    return RT_TRUE;
+}
+
+rt_bool_t dc_event_handler(struct rtgui_object *object, rtgui_event_t *event)
+{
+    rt_bool_t err;
+    struct rtgui_win *win = RTGUI_WIN(object);
+
+    err = rtgui_win_event_handler(RTGUI_OBJECT(win), event);
+    if (event->type == RTGUI_EVENT_PAINT)
+        show_demo(win);
+
+    return err;
+}
+
+static void rt_gui_demo_entry(void *parameter)
+{
+    struct rtgui_win *main_win;
+    struct rtgui_app *app;
+
+    /* create gui app */
+    app = rtgui_app_create("gui_demo");
+    if (app == RT_NULL)
+        return;
+
+    main_win = rtgui_mainwin_create(RT_NULL, "UiWindow", RTGUI_WIN_STYLE_NO_TITLE);
+    if (main_win == RT_NULL)
+    {
+        rtgui_app_destroy(app);
+        return;
+    }
+    rtgui_object_set_event_handler(RTGUI_OBJECT(main_win), dc_event_handler);
+    rtgui_win_show(main_win, RT_FALSE);
+
+    rtgui_app_run(app);
+    rtgui_win_destroy(main_win);
+    rtgui_app_destroy(app);
+}
+
+int rt_gui_demo_init(void)
+{
+    rt_thread_t tid;
+    rt_device_t device;
+    rt_err_t  err;
+    
+    device = rt_device_find("lcd");
+    if (device == RT_NULL)
+    {
+        rt_kprintf("Not found LCD driver\n");
+        return RT_ERROR;
+    }
+    
+    err = rt_device_open(device, RT_DEVICE_OFLAG_RDWR);
+    if (err != RT_EOK)
+    {
+        rt_kprintf("Open LCD driver fail\n");
+        return RT_ERROR;
+    }
+    
+    /* set graphic device */
+    rtgui_graphic_set_device(device);
+    
+    tid = rt_thread_create("mygui",
+        rt_gui_demo_entry, RT_NULL,
+        2048, 25, 10);
+
+    if (tid != RT_NULL)
+        rt_thread_startup(tid);
+
+    return 0;
+}
+INIT_APP_EXPORT(rt_gui_demo_init);
+#endif /* RT_USING_RTGUI */