javascript - Integrate virtual keyboard into extjs 4.2 form

Question

I'm adding the virtual keyboard from http://www.greywyvern.com/code/javascript/keyboard to a text field of an extjs 4.2 form.

It basically works, see here: http://jsfiddle.net/g5VN8/1/

1) My first question is: is this really the best way to connect them? Looks ugly to me with a timer instead of events to keep the extjs value up to date.

Plus I can't overcome the following two issues:

2) the keyboard icon is wrapped to a new line. It should instead be at the end of the field, on the right side, just as in the examples here: http://www.greywyvern.com/code/javascript/keyboard

3) The field focus doesn't work. I have it in a show listener. Even when wrapped in a window.setTimeout() it doesn't work, so it's not a timing issue. No error is thrown.

Here is a copy-paste (stackoverflow's rules). I'll keep both places up to date.

Ext.onReady(function() {    
    Ext.QuickTips.init();

    var formPanel = Ext.create('Ext.form.Panel', {
        renderTo: Ext.getBody(),
        bodyStyle: 'padding: 5px 5px 0 5px;',
        defaults: {
            anchor: '100%',
         },
        items: [{
            xtype:'textfield',
            name: 'string',
            fieldLabel: 'String',
            maxLength:30, enforceMaxLength:true,
            allowBlank: false,
            listeners: {
                show: function(field) {
                    //focus the field when the window shows
                    field.focus(true, 1000); //TODO: doesn't work, no error
                },
                afterrender:function(cmp){
                    cmp.inputEl.set({ //see http://jsfiddle.net/4TSDu/19/
                        autocomplete:'on'
                    });

                    //attach the keyboard
                    //because it modifies the dom directly we need to hack it to 
                    //inform extjs (really, ext has no such listener option?)
                    var interval = window.setInterval(function() {
                        try {
                            var newValue = cmp.inputEl.dom.value;
                            var oldValue = cmp.getValue();
                            if (newValue != oldValue) {
                                //only do it then, cause it also moves the cursor 
                                //to the end and that sucks.
                                cmp.setValue( newValue );
                            }
                        } catch (e) {
                            //form was removed
                            window.clearInterval(interval);
                        }
                    }, 100);
                    // see http://www.greywyvern.com/code/javascript/keyboard
                    VKI_attach(cmp.inputEl.dom); 
                }
            }
        }],
        buttons: [{
            text: 'Alert string',
            handler: function() {
                var stringField = this.up('form').getForm().findField('string');
                alert(stringField.getValue());
            }
        }]
    });
});

score 0 · Accepted Answer

您可以将侦听器附加到键盘，当用户单击 VKI 键时，您会触发文本字段更改事件。

Ext.getBody().on({
mousedown: function (ev) {
    if (ev.target.tagName === 'TD') {
        // We trigger change event only on textfield with the focus
        if (document.activeElement) {
            if (document.activeElement.id === cmp.inputEl.dom.id) cmp.fireEvent('change');
        }
    }
}, 
delegate: '#keyboardInputMaster'
});

这是因为 ExtJS 4 用“style=width:100%”写入输入字段。一种简单的方法是向文本字段添加负边距

fieldStyle: 'margin-right:-40px'
奇怪的 ExtJS 行为。您必须关注输入元素，而不是文本字段组件
```
Ext.defer(function () {
    cmp.inputEl.dom.focus();
}, 100);
```

你可以在这里看到整个解决方案：http: //jsfiddle.net/EGbLn/3/

score 0 · Accepted Answer

避免使用计时器。请改用常规的 dom 事件侦听器。

afterrender: function (cmp) {
    ...

    // simply attach this to the change event from dom element
    cmp.inputEl.dom.addEventListener('change', function(){
        cmp.setValue(this.value);
    });

    ...
}

（已由 Samy Rancho 回答）
```
fieldStyle: 'margin-right:-40px',
```

再次，避免使用计时器和类似的东西。只需添加以下内容：

afterrender: function (cmp) {
    ...

    //focus on field
    cmp.inputEl.dom.focus();

    ...
}

在这里找到更新的小提琴：http: //jsfiddle.net/g5VN8/11/

javascript - Integrate virtual keyboard into extjs 4.2 form

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