# aardio 范例: 实现下拉框



```aardio
//实现下拉框
import fonts.fontAwesome;
import win.ui;
/*DSG{{*/
var winform = win.form(text="aardio form";right=759;bottom=469)
winform.add(
dropdown={cls="plus";left=330;top=331;right=483;bottom=362;bgcolor=0xE6E6E6;border={color=0xFFE3C9;width=2};editable=1;font=LOGFONT(h=-13);forecolor=0xFFFFFF;iconStyle={align="right";font=LOGFONT(name='FontAwesome');padding={right=8}};iconText='\uF078';notify=1;paddingRight=28;textPadding={left=2;top=6;right=1;bottom=2};z=1};
menuItem={cls="plus";text="测试菜单 1";left=330;top=362;right=483;bottom=407;align="left";bgcolor=0xAFDB8A;border={left=1;right=1;bottom=1;color=0xFFE3C9};iconStyle={font=LOGFONT(name='FontAwesome');padding={left=22;top=2;right=115}};iconText='\uF21C';tabstop=1;textPadding={left=44};z=2};
menuItem2={cls="plus";text="测试菜单2";left=330;top=407;right=483;bottom=452;align="left";bgcolor=0xAFDB8A;border={left=1;right=1;bottom=1;color=0xFFE3C9};iconStyle={font=LOGFONT(name='FontAwesome');padding={left=22;top=2;right=118}};iconText='\uF1C9';ont=LOGFONT(name='FontAwesome';charset=0);tabstop=1;textPadding={left=44};z=3};
menuItem3={cls="plus";text="测试菜单 3";left=330;top=452;right=483;bottom=497;align="left";bgcolor=0xAFDB8A;border={left=1;right=1;bottom=1;color=0xFFE3C9};iconStyle={font=LOGFONT(name='FontAwesome');padding={left=22;top=2;right=119}};iconText='\uF18C';tabstop=1;textPadding={left=44};z=4}
)
/*}}*/

import win.ui.tabs;
var menu = win.ui.tabs(winform.menuItem,winform.menuItem2,winform.menuItem3)
menu.skin( { 
	foreground={
		default = 0xFFFFFFFF;
		hover= 0xFF8ADBAF;
	};
	checked = { 
		foreground={
			default = 0xFFDB8A8E;
			hover= 0xFF8ADBAF;
		}; 
	}
})

// 用户点选菜单项触发此事件,tab参数是点选的控件
menu.onOk = function(tab){
	winform.dropdown.setFocus(menu.selText)
}

// 切换到弹出列表模式,并使用参数指定的控件处理键盘事件
menu.initPopup(winform.dropdown.editBox)

// 禁止共享编辑框外观状态(focus状态除外)
winform.dropdown.editState = false
winform.dropdown.skin({
	background = { hover = 0xFFF78987 }
	checked = { 
		iconText = '\uF077';
	}  
})

// 显示弹出菜单，弹出菜单会自动修改winform.dropdown的checked属性为菜单打开状态
winform.dropdown.oncommand = function(id,event){ 
	if(winform.dropdown.checked ){
		menu.selText = winform.dropdown.text
		menu.popup(true,winform.dropdown)
	}  
}

winform.show() 
win.loopMessage();
```