2015-05-19 16:05题主

window下form表单怎么设置控件全部不能编辑

功能描述:grid 数据是通过新建个window完成的,当选择grid一条数据,打开window,window里面是grid行数据的详细信息,当满足某条件时,这个window里面的控件值是全都不能修改,类似于只能查看,不可进行修改。怎么实现窗口里面控件全不可编辑,只读。
window里面是个form表单,form里面是各种组件,不想每个组件都设为只读,有很多组件的,有没有简单办法?

2015-05-20 18:25#1

2015-05-21 14:09#2
好使是好使,能不能用readonly 什么的,这个就变成灰色的,效果不太理想呀
2015-05-21 17:22#3

2015-05-21 17:23#4
各种输入组件如textfield都是继承自field类的,所以可以批量查询出来
2015-06-03 18:05#5
query是神马用途?我看语法有点复杂,哪位大神能普及一下用法吗?
2015-06-10 14:19#6
found:
prevField = myField.previousNode('textfield');

To match only the exact type, pass the "shallow" flag by adding (true) to xtype (See AbstractComponent's isXType method):

prevTextField = myField.previousNode('textfield(true)');

You can search Components by their id or itemId property, prefixed with a #:

#myContainer

Component xtype and id or itemId can be used together to avoid possible id collisions between Components of different types:

panel#myPanel

When Component's id or xtype contains dots, you can escape them in your selector:

my\.panel#myPanel

Keep in mind that JavaScript treats the backslash character in a special way, so you need to escape it, too, in the actual code:

var myPanel = Ext.ComponentQuery.query('my\\.panel#myPanel');

Traversing Component tree

Components can be found by their relation to other Components. There are several relationship operators, mostly taken from CSS selectors:

  • E F All descendant Components of E that match F
  • E > F All direct children Components of E that match F
  • E ^ F All parent Components of E that match F

Expressions between relationship operators are matched left to right, i.e. leftmost selector is applied first, then if one or more matches are found, relationship operator itself is applied, then next selector expression, etc. It is possible to combine relationship operators in complex selectors:

window[title="Input form"] textfield[name=login] ^ form > button[action=submit]

That selector can be read this way: Find a window with title "Input form", in that window find a TextField with name "login" at any depth (including subpanels and/or FieldSets), then find an Ext.form.Panel that is a parent of the TextField, and in that form find a direct child that is a button with custom property action set to value "submit".

Whitespace on both sides of ^ and > operators is non-significant, i.e. can be omitted, but usually is used for clarity.

Searching by Component attributes

Components can be searched by their object property values (attributes). To do that, use attribute matching expression in square brackets:

  • component[autoScroll] - matches any Component that has autoScroll property with any truthy (non-empty, not false) value.
  • panel[title="Test"] - matches any Component that has title property set to "Test". Note that if the value does not contain spaces, the quotes are optional.

Attributes can use any of the operators in DomQuery's operators to compare values.

Prefixing the attribute name with an at sign @ means that the property must be the object's ownProperty, not a property from the prototype chain.

Specifications like [propName] check that the property is a truthy value. To check that the object has an ownProperty of a certain name, regardless of the value use the form [?propName].

The specified value is coerced to match the type of the property found in the candidate Component using Ext.coerce.

If you need to find Components by their itemId property, use the #id form; it will do the same as [itemId=id] but is easier to read.

If you need to include a metacharacter like (, ), [, ], etc., in the query, escape it by prefixing it with a backslash:

 var component = Ext.ComponentQuery.query('[myProperty=\\[foo\\]]');

Attribute matching operators

The '=' operator will return the results that exactly match the specified object property (attribute):

Ext.ComponentQuery.query('panel[cls=my-cls]');

Will match the following Component:

Ext.create('Ext.window.Window', {
    cls: 'my-cls'
});

But will not match the following Component, because 'my-cls' is one value among others:

 Ext.create('Ext.panel.Panel', {
     cls: 'foo-cls my-cls bar-cls'
 });

You can use the '~=' operator instead, it will return Components with the property that exactly matches one of the whitespace-separated values. This is also true for properties that only have one value:

Ext.ComponentQuery.query('panel[cls~=my-cls]');

Will match both Components:

Ext.create('Ext.panel.Panel', {
    cls: 'foo-cls my-cls bar-cls'
});

Ext.create('Ext.window.Window', {
    cls: 'my-cls'
});

Generally, '=' operator is more suited for object properties other than CSS classes, while '~=' operator will work best with properties that hold lists of whitespace-separated CSS classes.

The '^=' operator will return Components with specified attribute that start with the passed value:

Ext.ComponentQuery.query('panel[title^=Sales]');

Will match the following Component:

Ext.create('Ext.panel.Panel', {
    title: 'Sales estimate for Q4'
});

The '$=' operator will return Components with specified properties that end with the passed value:

Ext.ComponentQuery.query('field[fieldLabel$=name]');

Will match the following Component:

Ext.create('Ext.form.field.Text', {
    fieldLabel: 'Enter your name'
});

The '/=' operator will return Components with specified properties that match the passed regular expression:

Ext.ComponentQuery.query('button[action/="edit|save"]');

Will match the following Components with a custom action property:

Ext.create('Ext.button.Button', {
     action: 'edit'
});

Ext.create('Ext.button.Button', {
     action: 'save'
});

When you need to use meta characters like [], (), etc. in your query, make sure to escape them with back slashes:

Ext.ComponentQuery.query('panel[title="^Sales for Q\\[1-4\\]"]');

The following test will find panels with their ownProperty collapsed being equal to false. It will not match a collapsed property from the prototype chain.

Ext.ComponentQuery.query('panel[@collapsed=false]');

Member expressions from candidate Components may be tested. If the expression returns a truthy value, the candidate Component will be included in the query:

var disabledFields = myFormPanel.query("{isDisabled()}");

Such expressions are executed in Component's context, and the above expression is similar to running this snippet for every Component in your application:

 if (component.isDisabled()) {
     matches.push(component);
 }

It is important to use only methods that are available in every Component instance to avoid run time exceptions. If you need to match your Components with a custom condition formula, you can augment Ext.Component to provide custom matcher that will return false by default, and override it in your custom classes:

 Ext.define('My.Component', {
     override: 'Ext.Component',
     myMatcher: function() { return false; }
 });

 Ext.define('My.Panel', {
     extend: 'Ext.panel.Panel',
     requires: ['My.Component'],     // Ensure that Component override is applied
     myMatcher: function(selector) {
         return selector === 'myPanel';
     }
 });

After that you can use a selector with your custom matcher to find all instances of My.Panel:

 Ext.ComponentQuery.query("{myMatcher('myPanel')}");

However if you really need to use a custom matcher, you may find it easier to implement a custom Pseudo class instead (see below).

Conditional matching

Attribute matchers can be combined to select only Components that match all conditions (logical AND operator):

Ext.ComponentQuery.query('panel[cls~=my-cls][floating=true][title$="sales data"]');

E.g., the query above will match only a Panel-descended Component that has 'my-cls' CSS class and is floating and with a title that ends with "sales data".

Expressions separated with commas will match any Component that satisfies either expression (logical OR operator):

Ext.ComponentQuery.query('field[fieldLabel^=User], field[fieldLabel*=password]');

E.g., the query above will match any field with field label starting with "User", or any field that has "password" in its label.

If you need to include a comma in an attribute matching expression, escape it with a backslash:

Ext.ComponentQuery.query('field[fieldLabel^="User\\, foo"], field[fieldLabel*=password]');

Pseudo classes

Pseudo classes may be used to filter results in the same way as in Ext.dom.Query. There are five default pseudo classes:

  • not Negates a selector.
  • first Filters out all except the first matching item for a selector.
  • last Filters out all except the last matching item for a selector.
  • focusable Filters out all except Components which are currently able to recieve focus.
  • nth-child Filters Components by ordinal position in the selection.

These pseudo classes can be used with other matchers or without them:

 // Select first direct child button in any panel
 Ext.ComponentQuery.query('panel > button:first');

 // Select last field in Profile form
 Ext.ComponentQuery.query('form[title=Profile] field:last');

 // Find first focusable Component in a panel and focus it
 panel.down(':focusable').focus();

 // Select any field that is not hidden in a form
 form.query('field:not(hiddenfield)');

Pseudo class nth-child can be used to find any child Component by its position relative to its siblings. This class' handler takes one argument that specifies the selection formula as Xn or Xn+Y:

 // Find every odd field in a form
 form.query('field:nth-child(2n+1)'); // or use shortcut: :nth-child(odd)

 // Find every even field in a form
 form.query('field:nth-child(2n)');   // or use shortcut: :nth-child(even)

 // Find every 3rd field in a form
 form.query('field:nth-child(3n)');

Pseudo classes can be combined to further filter the results, e.g., in the form example above we can modify the query to exclude hidden fields:

 // Find every 3rd non-hidden field in a form
 form.query('field:not(hiddenfield):nth-child(3n)');

Note that when combining pseudo classes, whitespace is significant, i.e. there should be no spaces between pseudo classes. This is a common mistake; if you accidentally type a space between field and :not, the query will not return any result because it will mean "find field's children Components that are not hidden fields...".

Custom pseudo classes

It is possible to define your own custom pseudo classes. In fact, a pseudo class is just a property in Ext.ComponentQuery.pseudos object that defines pseudo class name (property name) and pseudo class handler (property value):

// Function receives array and returns a filtered array.
Ext.ComponentQuery.pseudos.invalid = function(items) {
    var i = 0, l = items.length, c, result = [];
    for (; i < l; i++) {
        if (!(c = items[i]).isValid()) {
            result.push(c);
        }
    }
    return result;
};

var invalidFields = myFormPanel.query('field:invalid');
if (invalidFields.length) {
    invalidFields[0].getEl().scrollIntoView(myFormPanel.body);
    for (var i = 0, l = invalidFields.length; i < l; i++) {
        invalidFields[i].getEl().frame("red");
    }
}

Pseudo class handlers can be even more flexible, with a selector argument used to define the logic:

 // Handler receives array of itmes and selector in parentheses
 Ext.ComponentQuery.pseudos.titleRegex = function(components, selector) {
     var i = 0, l = components.length, c, result = [], regex = new RegExp(selector);
     for (; i < l; i++) {
         c = components[i];
         if (c.title && regex.test(c.title)) {
             result.push(c);
         }
     }
     return result;
 }

 var salesTabs = tabPanel.query('panel:titleRegex("sales\\s+for\\s+201[123]")');

Be careful when using custom pseudo classes with MVC Controllers: when you use a pseudo class in Controller's control or listen component selectors, the pseudo class' handler function will be called very often and may slow down your application significantly. A good rule of thumb is to always specify Component xtype with the pseudo class so that the handlers are only called on Components that you need, and try to make the condition checks as cheap in terms of execution time as possible. Note how in the example above, handler function checks that Component has a title first, before running regex test on it.

Query examples

Queries return an array of Components. Here are some example queries:

// retrieve all Ext.Panels in the document by xtype
var panelsArray = Ext.ComponentQuery.query('panel');

// retrieve all Ext.Panels within the container with an id myCt
var panelsWithinmyCt = Ext.ComponentQuery.query('#myCt panel');

// retrieve all direct children which are Ext.Panels within myCt
var directChildPanel = Ext.ComponentQuery.query('#myCt > panel');

// retrieve all grids or trees
var gridsAndTrees = Ext.ComponentQuery.query('gridpanel, treepanel');

// Focus first Component
myFormPanel.child(':focusable').focus();

// Retrieve every odd text field in a form
myFormPanel.query('textfield:nth-child(odd)');

// Retrieve every even field in a form, excluding hidden fields
myFormPanel.query('field:not(hiddenfield):nth-child(even)');

For easy access to queries based from a particular Container see the Ext.container.Container.queryExt.container.Container.down andExt.container.Container.child methods. Also see Ext.Component.up.

2015-06-23 08:42#7
query如果查指自定义属性?
如 textfield自定义属性abc=def,怎么查找这个textfield?

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