如何禁用`dijit / form / Select`中的选项焦点？ [英] How to disable focus for an option in `dijit/form/Select`?
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问题描述
我需要更改小部件的行为 dijit / form / Select 。
I need to change behavior for a widget dijit/form/Select.
小部件不应该允许焦点（从鼠标或使用键盘）为具有属性禁用的选项：true 。
Widget should not allow focus (from mouse or using the keyboard) for options which have property disabled: true.
我想知道如果你能指出我如何实现这个结果。
I would like to know if you can point me out how to achieve this result.
require([
'dijit/form/Select',
'dojo/_base/window',
'dojo/domReady!'
], function(Select, win) {
var select = new Select({
name: 'select2',
options: [{
label: '<i>Swedish Cars</i>',
value: '',
disabled: true
},
{
label: 'Volvo',
value: 'volvo'
},
{
label: 'Saab',
value: 'saab',
selected: true
},
{
label: '<i>German Cars</i>',
value: '',
disabled: true
},
{
label: 'Mercedes',
value: 'mercedes'
},
{
label: 'Audi',
value: 'audi'
}
]
}, 'select');
select.on('change', function(evt) {
console.log('myselect_event');
});
});
<link rel="stylesheet" href="//ajax.googleapis.com/ajax/libs/dojo/1.12.1/dijit/themes/claro/claro.css" />
<script>
window.dojoConfig = {
parseOnLoad: false,
async: true
};
</script>
<script src="//ajax.googleapis.com/ajax/libs/dojo/1.12.1/dojo/dojo.js"></script>
<body class="claro">
<div id="select"></div>
</body>
推荐答案
我可以使用猴子补丁解决这个问题。
I was able to solve this issue using a monkey patch.
解决方案包括：
- 在标签中添加标记，以便我们自定义
- 添加属性已禁用：项目选项中为true，因此项目不会触发
onChange。 - 使用鼠标和键盘时，禁用关注组合项目。
我仍然很有趣，
require([
'dijit/form/Select',
'dojo/_base/window',
'dojo/domReady!'
], function(Select, win) {
var select = new Select({
name: 'select2',
options: [{
label: '<i>Swedish Cars</i>',
value: '',
group: true,
disabled: true
}, {
label: 'Volvo',
value: 'volvo'
}, {
label: 'Saab',
value: 'saab',
selected: true
}, {
label: '<i>German Cars</i>',
value: '',
group: true,
disabled: true
}, {
label: 'Mercedes',
value: 'mercedes'
}, {
label: 'Audi',
value: 'audi'
}]
}, 'select');
select.on('change', function(value) {
alert(value);
});
select.dropDown._onUpArrow = function() {
this.dropDown.focusPrev()
}.bind(select);
select.dropDown._onDownArrow = function() {
this.dropDown.focusNext()
}.bind(select);
select.dropDown.focusNext = function() {
var next = this.dropDown._getNextFocusableChild(this.dropDown.focusedChild, 1);
var nextSuccessive;
var nextFinal;
if (next.option.group) {
var next = this.dropDown._getNextFocusableChild(this.dropDown.focusedChild, 1);
this.dropDown.focusChild(next);
nextSuccessive = this.dropDown._getNextFocusableChild(this.dropDown.focusedChild, 1);
nextFinal = nextSuccessive;
} else {
nextFinal = next;
}
this.dropDown.focusChild(nextFinal);
}.bind(select);
select.dropDown.focusPrev = function() {
var prev = this.dropDown._getNextFocusableChild(this.dropDown.focusedChild, -1);
var prevSuccessive;
var prevFinal;
if (prev.option.group) {
var prev = this.dropDown._getNextFocusableChild(this.dropDown.focusedChild, -1);
this.dropDown.focusChild(prev);
prevSuccessive = this.dropDown._getNextFocusableChild(this.dropDown.focusedChild, -1);
prevFinal = prevSuccessive;
} else {
prevFinal = prev;
}
this.dropDown.focusChild(prevFinal, true);
}.bind(select);
select.dropDown.onItemHover = function( /*MenuItem*/ item) {
if (item.option.group) {
item._set("hovering", false);
console.log('skip hover');
return;
}
if (this.activated) {
this.set("selected", item);
if (item.popup && !item.disabled && !this.hover_timer) {
this.hover_timer = this.defer(function() {
this._openItemPopup(item);
}, this.popupDelay);
}
} else if (this.passivePopupDelay < Infinity) {
if (this.passive_hover_timer) {
this.passive_hover_timer.remove();
}
this.passive_hover_timer = this.defer(function() {
this.onItemClick(item, {
type: "click"
});
}, this.passivePopupDelay);
}
this._hoveredChild = item;
item._set("hovering", true);
}.bind(select.dropDown);
select.dropDown._onItemFocus = function( /*MenuItem*/ item) {
if (item.option.group) {
return;
}
if (this._hoveredChild && this._hoveredChild != item) {
this.onItemUnhover(this._hoveredChild);
}
this.set("selected", item);
}.bind(select.dropDown);
});
<link rel="stylesheet" href="//ajax.googleapis.com/ajax/libs/dojo/1.12.1/dijit/themes/claro/claro.css" />
<script>
window.dojoConfig = {
parseOnLoad: false,
async: true
};
</script>
<script src="//ajax.googleapis.com/ajax/libs/dojo/1.12.1/dojo/dojo.js"></script>
<body class="claro">
<div id="select"></div>
</body>
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