add demo_view_module.c

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@965 bbd45198-f89e-11dd-88c7-29a3b14d5316

examples/gui/demo_view_module.c

+/*
+ * 程序清单：DC上显示图像演示
+ *
+ * 这个例子会在创建出的view上显示图像
+ */
+
+#include "demo_view.h"
+#include <rtgui/widgets/button.h>
+#include <rtgui/widgets/filelist_view.h>
+#include <string.h>
+
+static rt_module_t module = RT_NULL;
+static rtgui_view_t* _view = RT_NULL;
+
+/* 打开按钮的回调函数 */
+static void open_btn_onbutton(rtgui_widget_t* widget, struct rtgui_event* event)
+{
+	rtgui_filelist_view_t *view;
+	rtgui_workbench_t *workbench;
+	rtgui_rect_t rect;
+
+	/* 获得顶层的workbench */
+	workbench = RTGUI_WORKBENCH(rtgui_widget_get_toplevel(widget));
+	rtgui_widget_get_rect(RTGUI_WIDGET(workbench), &rect);
+
+	/* WIN32平台上和真实设备上的初始路径处理 */
+#ifdef _WIN32
+	view = rtgui_filelist_view_create(workbench, "d:\\", "*.*", &rect);
+#else
+	view = rtgui_filelist_view_create(workbench, "/", "*.*", &rect);
+#endif
+	/* 模态显示一个文件列表视图，以提供给用户选择图像文件 */
+	if (rtgui_view_show(RTGUI_VIEW(view), RT_TRUE) == RTGUI_MODAL_OK)
+	{
+		char path[32], name[8];
+
+		/* 设置文件路径的标签 */
+		rtgui_filelist_view_get_fullpath(view, path, sizeof(path));
+#if 0
+		if (module != RT_NULL) 
+		{
+			rt_module_unload(module);
+			module = RT_NULL;
+		}
+#endif
+		rt_memset(name, 0, sizeof(name));
+
+		/* 获得图像的类型 */
+		if (rt_strstr(path, ".mo") != RT_NULL)
+		{
+			memcpy(name, "mod", 4);
+		}	
+
+		/* 如果图像文件有效，创建相应的rtgui_image对象 */
+		if (name[0] != '\0')
+			module = rt_module_load_from_file(name, path);
+	}
+
+	/* 删除 文件列表 视图 */
+	rtgui_view_destroy(RTGUI_VIEW(view));
+	rtgui_view_show(_view, RT_FALSE);
+}
+
+/* 创建用于显示应用模块的演示视图 */
+rtgui_view_t* demo_view_module(rtgui_workbench_t* workbench)
+{
+	rtgui_rect_t rect;
+	rtgui_button_t* open_btn;
+
+	/* 先创建一个演示视图 */
+	_view = demo_view(workbench, "应用模块演示");
+
+	/* 添加一个按钮 */
+	demo_view_get_rect(_view, &rect);
+	rect.x1 += 5; rect.x2 = rect.x1 + 120;
+	rect.y2 = rect.y1 + 20;
+	open_btn = rtgui_button_create("打开应用模块");
+	rtgui_container_add_child(RTGUI_CONTAINER(_view), RTGUI_WIDGET(open_btn));
+	rtgui_widget_set_rect(RTGUI_WIDGET(open_btn), &rect);
+	rtgui_button_set_onbutton(open_btn, open_btn_onbutton);
+
+	return _view;
+}