add prefix_xml_ui tool and update docs

README.md

@@ -84,6 +84,9 @@ demos\demo1
 
 ## 最新动态
 
+* 2018/03/11
+    * 增加XML界面描述文件预览工具。
+  
 * 2018/03/10 
     * lua绑定及相关示例完成。
     * 支持从UI描述文件创建界面。

demos/.gitignore

@@ -1,3 +1,5 @@
 demo1
-demo1.exp
-demo1.lib
+demoui
+prefix_xml_ui
+*.exe
+*.lib

demos/README.md

@@ -4,6 +4,11 @@
 
 * demo1  按传统方式创建界面。
 * demoui 从UI资源文件中创建界面。
+* ./prefix\_xml\_ui 预览XML界面描述文件。
+
+```
+./prefix\_xml\_ui ../tools/ui_gen/window1.xml 
+```
 
 ### 源代码介绍
 

demos/SConscript

@@ -10,5 +10,8 @@ env['LINKFLAGS'] = env['OS_SUBSYSTEM_WINDOWS'] + env['LINKFLAGS'];
 env.Program('demo1', ['demo_main.c', 'demo1_app.c']);
 env.Program('demoui', ['demo_ui_app.c', 'demo_main.c']);
 
+env['LIBS'] = ['xml'] + env['LIBS']
+env.Program('prefix_xml_ui', ['prefix_xml_ui.c']);
+
 
 

demos/prefix_xml_ui.c

@@ -0,0 +1,83 @@
+/**
+ * File:   demo_main.c
+ * Author: Li XianJing <xianjimli@hotmail.com>
+ * Brief:  demo main
+ *
+ * Copyright (c) 2018 - 2018  Li XianJing <xianjimli@hotmail.com>
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * License file for more details.
+ *
+ */
+
+/**
+ * History:
+ * ================================================================
+ * 2018-02-16 Li XianJing <xianjimli@hotmail.com> created
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include "resource.h"
+#include "base/lftk.h"
+#include "base/mem.h"
+#include "ui_loader/ui_loader_xml.h"
+#include "ui_loader/ui_builder_default.h"
+
+static uint32_t s_heap_mem[2048];
+
+char* read_file(const char* file_name, uint32_t* length) {
+  struct stat st = {0};
+  if (stat(file_name, &st)) {
+    return NULL;
+  } else {
+    char* buffer = (char*)MEM_ALLOC(st.st_size + 1);
+    FILE* fp = fopen(file_name, "rb");
+    fread(buffer, 1, st.st_size, fp);
+    fclose(fp);
+    buffer[st.st_size] = '\0';
+    *length = st.st_size;
+
+    return buffer;
+  }
+}
+
+widget_t* prefix_xml_ui(const char* filename) {
+  uint32_t size = 0;
+  uint8_t* content = (uint8_t*)read_file(filename, &size);
+  ui_loader_t* loader = xml_ui_loader();
+  ui_builder_t* builder = ui_builder_default();
+  printf("preview %s\n", filename);
+  return_value_if_fail(content != NULL, NULL);  
+  ui_loader_load(loader, content, size, builder);
+  free(content);
+
+  return builder->root;
+}
+
+#if defined(WIN32)
+#include <windows.h>
+int WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hprevinstance, LPSTR lpcmdline, int ncmdshow) {
+  int argc = 1;
+  const char* filename = (lpcmdline && *lpcmdline) ? lpcmdline : "../tools/ui_gen/window1.xml";
+#else
+#include "base/mem.h"
+int main(int argc, char* argv[]) {
+  const char* filename = argc == 1 ? "../tools/ui_gen/window1.xml" : argv[1];
+#endif
+  widget_t* win = NULL;
+
+  lftk_init(320, 480, s_heap_mem, sizeof(s_heap_mem));
+  resource_init();
+  win = prefix_xml_ui(filename);
+  lftk_run();
+  widget_destroy(win);
+
+  return 0;
+}

src/base/window_manager.c

@@ -150,6 +150,10 @@ ret_t window_manager_on_paint_children(widget_t* widget, canvas_t* c) {
       }
     }
 
+    if(i < 0) {
+      i = 0;
+    }
+
     for (; i < nr; i++) {
       widget_t* iter = (widget_t*)(widget->children->elms[i]);
       if (iter->visible) {