496 lines
12 KiB
Markdown
496 lines
12 KiB
Markdown
# bricks的事件处理
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bricks的事件处理是在控件描述文件的binds区域中添加事件处理说明来实现的
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## bricks支持的事件处理类型
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* urlwidget
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* method
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* script
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* registerfunction
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* event
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例外还支持一种混合型
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* actions
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在事件处理定义中使用"actiontype"属性来定义事件处理类型
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## 事件处理定义数据要素
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所有事件处理类型都有的数据要素有
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### wid
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事件发起方id,关于wid规则请查看[控件id](widgetid.md)
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### event
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支持控件的html原生事件以及控件类中定义的事件,或者是event事件处理类型中dispatch_event属性中定义的事件
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### actiontype
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指定事件处理类型,支持“urlwidget", "method", "script", "registerfunction", "event", 或者“actions”混合型
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### conform
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对象类型,确认控件的options,如存在,则此绑定需要用户确认后再执行
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### datawidget
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给事件添加动态参数时定义获取动态参数的控件的id,关于datawidget规则请查看[控件id](widgetid.md)
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如果不需要使用动态参数,那么datawidget, datamethod, datascript, dataparams这几个属性可以不设置。
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### datamethod
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获取动态参数的方法
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### datascript
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获取动态参数的脚本
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### dataparams
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获取动态参数时需给定的参数, 可选,对象类型,k,v形式给定参数
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### 获取动态参数说明
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绑定任务获取实时数据作为参数,需要给定以下属性:
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* datawidget:字符串或控件类型,获取实时数据的控件
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* datamethod:字符串类型,控件的方法,使用params作为参数调用,
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获取实时数据的方法
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* datascript:字符串类型, js脚本,使用return返回数据
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* dataparams:参数
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datamethod 优先datascript,从datawidget控件中通过datamethod
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### target
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字符串或控件实例,目标控件实例,如果是字符串,使用”getWidgetById“函数获得目标控件实例,关于target规则请查看[控件id](widgetid.md)
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### conform
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如果一个事件处理需要用户确认,可以在事件处理中指定一个conform属性来引发,当此事件发生时,会弹出一个确认窗口,用户确认后才会处理此事件,否则不处理
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不同的事件处理方法也有部分不同的事件处理属性,一下分别说明:
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### urlwidget方法
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urlwidget事件处理方法是从后台获取一个控件描述文件,动态生成bricks控件,并将控件添加(添加,添加或替换)到事件处理指定的控件中。
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urlwidget绑定需要一个options属性和一个mode属性,在此属性中需要
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* url:字符串类型, 获取desc数据的url
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* mehtod:字符串类型,url调用的方法,缺省”GET“
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* params:对象类型,调用的参数, 从datawidget获取的数据影响此属性
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绑定创建的控件添加到target控件中
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例子
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```
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{
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"widgettype":"VBox",
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"options":{
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"width":"100%",
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"height":"100%"
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},
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"subwidgets":[
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{
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"widgettype":"HBox",
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"options":{
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"height":"40px"
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},
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"subwidgets":[
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{
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"id":"replace",
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"widgettype":"Button",
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"options":{
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"width":"80px",
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"i18n":true,
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"label":"replace mode"
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}
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},
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{
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"id":"insert",
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"widgettype":"Button",
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"options":{
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"width":"80px",
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"i18n":true,
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"label":"insert mode"
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}
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},
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{
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"id":"append",
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"widgettype":"Button",
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"options":{
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"width":"80px",
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"i18n":true,
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"label":"append mode"
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}
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}
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]
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},
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{
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"id":"main",
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"widgettype":"Filler"
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}
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],
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"binds":[
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{
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"wid":"replace",
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"event":"click",
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"actiontype":"urlwidget",
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"target":"main",
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"options":{
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"url":"{{entire_url('replace_text.ui')}}",
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"params":{
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"text":"Insert before"
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}
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}
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},
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{
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"wid":"insert",
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"event":"click",
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"actiontype":"urlwidget",
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"target":"main",
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"options":{
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"url":"{{entire_url('insert_text.ui')}}",
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"params":{
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"text":"Insert before"
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}
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},
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"mode":"insert"
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},
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{
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"wid":"append",
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"event":"click",
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"actiontype":"urlwidget",
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"target":"main",
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"options":{
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"url":"{{entire_url('subtext.ui')}}",
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"params":{
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"text":"Append After"
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}
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},
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"mode":"append"
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}
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]
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}
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```
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在上述例子中,我们使用了一个竖向排列的容器(VBox),并在此容器中添加了两个字控件,分别是一个横向排列的容器HBox,和一个填充器(Filler)
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并在横向排列的子控件中添加了3个按钮控件, 每个Button定义了id, 分别是replace,insert,和append,在主控件(VBox)的binds中分别定义了三个事件处理,分别对应于3个Button的click事件,演示了三种子控件在target控件中插入的模式(替换所有子控件,插入在已有子控件之前,添加到已有子控件之后)
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### method方法
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需要指定target参数和method参数,
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* target:类型为字符串或控件类型,
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如果是字符串,使用“getWidgetById”函数获取控件实例。
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* method:字符串,target实例的方法,
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* params:传递给方法的参数
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method绑定方法,将事件绑定到target控件的一个方法,并用params传递参数
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例子
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```
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{
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"widgettype":"VBox",
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"options":{
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"width":"100%",
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"height":"100%"
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},
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"subwidgets":[
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{
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"widgettype":"HBox",
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"options":{
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"height":"40px"
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},
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"subwidgets":[
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{
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"id":"changetext",
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"widgettype":"Button",
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"options":{
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"dynsize":false,
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"width":"80px",
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"i18n":true,
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"label":"Change text"
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}
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},
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{
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"id":"smaller",
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"widgettype":"Button",
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"options":{
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"dynsize":false,
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"width":"80px",
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"i18n":true,
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"label":"Small size"
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}
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},
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{
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"id":"larger",
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"widgettype":"Button",
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"options":{
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"dynsize":false,
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"width":"80px",
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"i18n":true,
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"label":"larger size"
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}
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}
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]
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},
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{
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"widgettype":"Filler",
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"options":{},
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"subwidgets":[
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{
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"id":"text_1",
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"widgettype":"Text",
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"options":{
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"dynsize":true,
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"text":"original text"
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}
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}
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]
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}
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],
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"binds":[
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{
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"wid":"changetext",
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"event":"click",
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"actiontype":"method",
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"target":"text_1",
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"params":"new text",
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"method":"set_text"
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},
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{
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"wid":"smaller",
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"event":"click",
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"actiontype":"method",
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"target":"app",
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"method":"textsize_smaller"
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},
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{
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"wid":"larger",
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"event":"click",
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"actiontype":"method",
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"target":"app",
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"method":"textsize_bigger"
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}
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]
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}
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```
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上述例子中,三个Button分别驱动app中textsize_smaller(),textsize_bigger()来改变bricks字符大小,从而影响到text_1控件的显示大小
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### script方法
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绑定脚本,此方法将事件绑定到一个脚本,支持以下属性
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* script:字符串,脚本正文
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* params:对象类型,脚本可以访问params变量来获取参数。
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脚本中可以使用以下变量:
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* this 事件处理中target对应的控件实例
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* params:参数对象,datawidget获得的数据会添加到params中
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例子
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```
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{
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"id":"insert",
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"widgettype":"Button",
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"options":{
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"width":"80px",
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"i18n":true,
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"label":"click me"
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},
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"binds":[
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{
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"wid":"self",
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"event":"click",
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"actiontype":"script",
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"target":"self",
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"script":"console.log(this, params, event);"
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}
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]
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}
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```
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在上述例子中定义了使用“script”事件处理方法来处理Button的“click事件”, 在click后在控制台上把事件传过来的参数显示出来
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### registerfunction方法
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事件绑定一个注册函数, 参看[RegisterFunction](registerfunction.md)
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支持以下属性:
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* rfname:字符串,已注册的函数名称
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* params:对象类型,调用注册函数时作为参数传递给注册函数。
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```
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<link rel="stylesheet" href="http://localhost:80/bricks/css/bricks.css">
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<!-- support IE8 (for Video.js versions prior to v7) -->
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<script src="http://localhost:80/bricks/3parties/videojs-ie8.min.js"></script>
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</head>
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<body>
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<script src="http://localhost:80/bricks/3parties/marked.min.js"></script>
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<script src="http://localhost:80/bricks/3parties/xterm.js"></script>
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<script src="http://localhost:80/bricks/3parties/video.min.js"></script>
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<script src="http://localhost:80/bricks/3parties/recorder.wav.min.js"></script>
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<!--- <script src="http://localhost:80/bricks/3parties/videojs-contrib-hls.min.js"></script> --->
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<script src="http://localhost:80/bricks/bricks.js"></script>
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<script>
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/*
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if (bricks.is_mobile()){
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alert('wh=' + window.innerWidth + ':' + window.innerHeight);
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}
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*/
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var myfunc = function(params){
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this.set_text(params.text);
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}
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bricks.RF.register('setText', myfunc);
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const opts = {
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"widget": {
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"widgettype":"VBox",
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"options":{
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"width":"100%",
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"height":"100%"
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},
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"subwidgets":[
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{
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"widgettype":"HBox",
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"options":{
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"height":"40px"
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},
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"subwidgets":[
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{
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"id":"changetext",
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"widgettype":"Button",
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"options":{
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"dynsize":false,
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"width":"80px",
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"i18n":true,
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"label":"Change text"
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}
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},
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{
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"id":"smaller",
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"widgettype":"Button",
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"options":{
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"dynsize":false,
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"width":"80px",
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"i18n":true,
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"label":"Small size"
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}
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},
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{
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"id":"larger",
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"widgettype":"Button",
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"options":{
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"dynsize":false,
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"width":"80px",
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"i18n":true,
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"label":"larger size"
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}
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}
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]
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},
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{
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"widgettype":"Filler",
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"options":{},
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"subwidgets":[
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{
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"id":"text_1",
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"widgettype":"Text",
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"options":{
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"dynsize":true,
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"text":"original text"
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}
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}
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]
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}
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],
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"binds":[
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{
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"wid":"changetext",
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"event":"click",
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"actiontype":"registerfunction",
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"target":"text_1",
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"params":{
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"text":"new text"
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},
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"rfname":"setText"
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},
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{
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"wid":"smaller",
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"event":"click",
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"actiontype":"method",
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"target":"app",
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"method":"textsize_smaller"
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},
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{
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"wid":"larger",
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"event":"click",
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"actiontype":"method",
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"target":"app",
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"method":"textsize_bigger"
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}
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]
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} };
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const app = new bricks.App(opts);
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app.run();
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</script>
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</body>
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</html>
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```
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在上述例子中,使用bricks.RF注册了一个setText函数, 并在主控件的binds区域定义了当changetext按钮点击后调用注册函数“setText”来处理
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### event方法
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绑定事件,需指定target,触发target对象的一个事件
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支持以下属性
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dispatch_event:需触发的事件名
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params:传递给事件的参数,处理函数可以使用evemt.params获得此参数
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```
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{
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"widgettype":"VBox",
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"options":{},
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"subwidgets":[
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{
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"id":"btn1",
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"widgettype":"Button",
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"options":{
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"label":"press me"
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}
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},
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{
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"id":"txt1",
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"widgettype":"Text",
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"options":{
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"otext":"I will dispatch a event when btn1 pressed",
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"i18n":true
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}
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}
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],
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"binds":[
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{
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"wid":"btn1",
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"event":"click",
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"actiontype":"event",
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"target":"txt1",
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"dispatch_event":"gpc"
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},
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{
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"wid":"txt1",
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"event":"gpc",
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"actiontype":"script",
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"target":"self",
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"script":"alert('yield');"
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}
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]
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}
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```
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上述例子中,在主控件的binds区域定义了btn1的按钮点击后使用event处理类型来处理btn1的click事件,即转而触发“txt1”正文控件的“gpc”事件,并定义了当”txt1“正文控件在gpc事件发生后使用script事件处理方法alert一个消息
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## 定义需要确认的事件处理
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有时候我们需要客户确认后在处理事件,如果用户不确认,则放弃处理事件,比如在删除数据时我们通常需要用户确认一下
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例子
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```
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{
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"id":"insert",
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"widgettype":"Button",
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"options":{
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"width":"80px",
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"i18n":true,
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"label":"click me"
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},
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"binds":[
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{
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"wid":"self",
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"event":"click",
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"actiontype":"script",
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"conform":{
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"title":"conformtest",
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"message":"测试事件处理前的用户确认功能,确认码?"
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},
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"target":"self",
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"script":"alert('确认过眼神!')"
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}
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]
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}
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```
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上述例子中定义了Button的click事件使用script事件处理方式来处理,但是在处理前需要显示信息,让用户确认是否继续,如果用户放弃则不处理事件,确认后正常的处理事件。
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## actions方法
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|