AWTK可以直接加载XML格式的和二进制格式的界面描述数据,从性能和资源开销的角度考虑,二进制格式是更好的选择,AWTK提供了工具将XML格式转换成二进制格式的界面描述数据,也提供了将QT的UI文件和微软的RC文件转换成AWTK XML格式的界面描述文件的工具,其工作流程如下:
AWTK的UI Builder还在意淫之中,打算用AWTK本身来开发,可能需要等到2018年底了,目前可以使用Qt Designer或微软的VC来做界面(主要生成各个控件的坐标),再转换成AWTK XML UI文件,适当的编辑之后,转换成AWTK二进制的UI数据。
AWTK XML界面描述数据非常紧凑和直观:
- name 是控件的名称,创建完成之后可以用widget_look_up函数找到指定名称的控件。
- x x坐标
- y y坐标
- w 宽度
- h 高度
- text 文本
- value 值
x/y/w/h 可以使用AWTK的layout参数。
<window name="main" x="0" y="0" w="320" h="480">
<button name="inc" x="10" y="5" w="40%" h="30" text="Inc"/>
<button name="dec" x="right:10" y="5" w="40%" h="30" text="Dec"/>
<image name="img" x="10" y="230" w="100" h="100"/>
<label name="" x="10" y="40" w="80" h="30" text="Left"/>
<label name="" x="100" y="40" w="80" h="30" text="Center"/>
<label name="" x="200" y="40" w="80" h="30" text="Right"/>
<progress_bar name="bar1" x="10" y="80" w="168" h="30" value="40"/>
<progress_bar name="bar2" x="260" y="80" w="30" h="118" value="20" vertical="true"/>
<check_button name="c1" x="10" y="150" w="80" h="30" text="Book"/>
<check_button name="c2" x="100" y="150" w="80" h="30" text="Food"/>
<radio_button name="r1" x="10" y="200" w="80" h="30" text="Book"/>
<radio_button name="r2" x="100" y="200" w="80" h="30" text="Food"/>
<radio_button name="r3" x="190" y="200" w="80" h="30" text="Pencil" value="true"/>
<button name="dialog" x="10" y="260" w="40%" h="30" text="Dialog"/>
<button name="dialog2" x="right:10" y="260" w="40%" h="30" text="Dialog2"/>
</window>
XML UI文件写好后,可以用预览工具预览。如:
./bin/preview_ui demos/assets/raw/ui/main.xml
对XML预览的效果满意之后,把它转换成二进制的格式:
./bin/xml_to_ui window1.xml window1.data
为了方便在没有文件系统的嵌入式系统中使用,直接生成常量数据,和程序一起编译。如:
1 const unsigned char ui_window1[] = {
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在程序中引用,并放入资源管理器中:
#include "res/ui/window1.data"
...
assets_manager_add((const asset_info_t*)ui_window1);
在需要打开该窗口时,调用window_open函数(对话框用dialog_open):
widget_t* win = window_open(name);
widget_child_on(win, "ok", EVT_CLICK, on_ok, win);
widget_child_on(win, "cancel", EVT_CLICK, on_cancel, win);
转换工具在bin/qt_to_xml目录下,使用方法:
Usage: ./bin/qt_to_xml in_filename out_filename
Ex: ./bin/qt_to_xml demo1.ui demo1.xml