自定义ExtJS控件之下拉树和下拉表格附源码
更新时间:2013年10月15日 16:53:57 作者:
在Ext官方的例子中只有下拉列表控件,但是在实际业务中只有下拉列表无法满足需求的,对于刚使用Ext的人来说,自定义一个控件好难,下面是具体的实现
简介
在Ext官方的例子中只有下拉列表控件,但是在实际业务中只有下拉列表无法满足需求的,像下拉树和下拉表格都是很常见的控件,对于刚使用Ext的人来说,自定义一个控件好难,其实多读官方的源码有些事情就不会那么难了。下面是下拉树的代码:
Ext.define('ComboTreeBox',{
extend : 'Ext.form.field.ComboBox',
multiSelect : true,
createPicker : function(){
var me = this;
//创建树控件
var picker = Ext.create('Ext.tree.Panel', {
store: me.store,
rootVisible: false,
selModel: {
mode: me.multiSelect ? 'SIMPLE' : 'SINGLE'
},
floating: true,
hidden: true,
focusOnToFront: false
});
//注册事件用于选择用户选择的值
me.mon(picker, {
itemclick: me.onItemClick,
refresh: me.onListRefresh,
scope: me
});
me.mon(picker.getSelectionModel(), {
beforeselect: me.onBeforeSelect,
beforedeselect: me.onBeforeDeselect,
selectionchange: me.onListSelectionChange,
scope: me
});
this.picker = picker;
return picker;
},
onItemClick: function(picker, record){
/*
* If we're doing single selection, the selection change events won't fire when
* clicking on the selected element. Detect it here.
*/
var me = this,
selection = me.picker.getSelectionModel().getSelection(),
valueField = me.valueField;
if (!me.multiSelect && selection.length) {
if (record.get(valueField) === selection[0].get(valueField)) {
// Make sure we also update the display value if it's only partial
me.displayTplData = [record.data];
me.setRawValue(me.getDisplayValue());
me.collapse();
}
}
}
});
下拉树的代码很简单,只要集成Ext.form.field.ComboBox类,然后重写createPicker方法就可以了,同理下拉表格也是如此,下面是下拉表格的代码:
Ext.define('ComboGridBox',{
extend : 'Ext.form.field.ComboBox',
multiSelect : true,
createPicker : function(){
var me = this;
var picker = Ext.create('Ext.grid.Panel', {
title : '下拉表格',
store: me.store,
frame : true,
resizable : true,
columns : [{
text : '#ID',
dataIndex : 'id'
},{
text : '名称' ,
dataIndex : 'name'
},{
text : '描述' ,
dataIndex : 'desc'
}],
selModel: {
mode: me.multiSelect ? 'SIMPLE' : 'SINGLE'
},
floating: true,
hidden: true,
width : 300,
columnLines : true,
focusOnToFront: false
});
me.mon(picker, {
itemclick: me.onItemClick,
refresh: me.onListRefresh,
scope: me
});
me.mon(picker.getSelectionModel(), {
beforeselect: me.onBeforeSelect,
beforedeselect: me.onBeforeDeselect,
selectionchange: me.onListSelectionChange,
scope: me
});
this.picker = picker;
return picker;
},
onItemClick: function(picker, record){
/*
* If we're doing single selection, the selection change events won't fire when
* clicking on the selected element. Detect it here.
*/
var me = this,
selection = me.picker.getSelectionModel().getSelection(),
valueField = me.valueField;
if (!me.multiSelect && selection.length) {
if (record.get(valueField) === selection[0].get(valueField)) {
// Make sure we also update the display value if it's only partial
me.displayTplData = [record.data];
me.setRawValue(me.getDisplayValue());
me.collapse();
}
}
},
matchFieldWidth : false,
onListSelectionChange: function(list, selectedRecords) {
var me = this,
isMulti = me.multiSelect,
hasRecords = selectedRecords.length > 0;
// Only react to selection if it is not called from setValue, and if our list is
// expanded (ignores changes to the selection model triggered elsewhere)
if (!me.ignoreSelection && me.isExpanded) {
if (!isMulti) {
Ext.defer(me.collapse, 1, me);
}
/*
* Only set the value here if we're in multi selection mode or we have
* a selection. Otherwise setValue will be called with an empty value
* which will cause the change event to fire twice.
*/
if (isMulti || hasRecords) {
me.setValue(selectedRecords, false);
}
if (hasRecords) {
me.fireEvent('select', me, selectedRecords);
}
me.inputEl.focus();
}
console.log(me.getValue());
},
doAutoSelect: function() {
var me = this,
picker = me.picker,
lastSelected, itemNode;
if (picker && me.autoSelect && me.store.getCount() > 0) {
// Highlight the last selected item and scroll it into view
lastSelected = picker.getSelectionModel().lastSelected;
itemNode = picker.view.getNode(lastSelected || 0);
if (itemNode) {
picker.view.highlightItem(itemNode);
picker.view.el.scrollChildIntoView(itemNode, false);
}
}
}
});
下拉表格也是继承了Ext.form.field.ComboBox这个类,重写了createPicker方法。
开发下拉树和下拉表格看起来so easy,只要研究透了Ext的运行机制,一切都会so easy
控件效果
实例下载
实例中的资源为myeclipse项目,导入即可运行,自己添加ext的js和css文件,实例中没有ext的基础文件。
下载地址
在Ext官方的例子中只有下拉列表控件,但是在实际业务中只有下拉列表无法满足需求的,像下拉树和下拉表格都是很常见的控件,对于刚使用Ext的人来说,自定义一个控件好难,其实多读官方的源码有些事情就不会那么难了。下面是下拉树的代码:
复制代码 代码如下:
Ext.define('ComboTreeBox',{
extend : 'Ext.form.field.ComboBox',
multiSelect : true,
createPicker : function(){
var me = this;
//创建树控件
var picker = Ext.create('Ext.tree.Panel', {
store: me.store,
rootVisible: false,
selModel: {
mode: me.multiSelect ? 'SIMPLE' : 'SINGLE'
},
floating: true,
hidden: true,
focusOnToFront: false
});
//注册事件用于选择用户选择的值
me.mon(picker, {
itemclick: me.onItemClick,
refresh: me.onListRefresh,
scope: me
});
me.mon(picker.getSelectionModel(), {
beforeselect: me.onBeforeSelect,
beforedeselect: me.onBeforeDeselect,
selectionchange: me.onListSelectionChange,
scope: me
});
this.picker = picker;
return picker;
},
onItemClick: function(picker, record){
/*
* If we're doing single selection, the selection change events won't fire when
* clicking on the selected element. Detect it here.
*/
var me = this,
selection = me.picker.getSelectionModel().getSelection(),
valueField = me.valueField;
if (!me.multiSelect && selection.length) {
if (record.get(valueField) === selection[0].get(valueField)) {
// Make sure we also update the display value if it's only partial
me.displayTplData = [record.data];
me.setRawValue(me.getDisplayValue());
me.collapse();
}
}
}
});
下拉树的代码很简单,只要集成Ext.form.field.ComboBox类,然后重写createPicker方法就可以了,同理下拉表格也是如此,下面是下拉表格的代码:
复制代码 代码如下:
Ext.define('ComboGridBox',{
extend : 'Ext.form.field.ComboBox',
multiSelect : true,
createPicker : function(){
var me = this;
var picker = Ext.create('Ext.grid.Panel', {
title : '下拉表格',
store: me.store,
frame : true,
resizable : true,
columns : [{
text : '#ID',
dataIndex : 'id'
},{
text : '名称' ,
dataIndex : 'name'
},{
text : '描述' ,
dataIndex : 'desc'
}],
selModel: {
mode: me.multiSelect ? 'SIMPLE' : 'SINGLE'
},
floating: true,
hidden: true,
width : 300,
columnLines : true,
focusOnToFront: false
});
me.mon(picker, {
itemclick: me.onItemClick,
refresh: me.onListRefresh,
scope: me
});
me.mon(picker.getSelectionModel(), {
beforeselect: me.onBeforeSelect,
beforedeselect: me.onBeforeDeselect,
selectionchange: me.onListSelectionChange,
scope: me
});
this.picker = picker;
return picker;
},
onItemClick: function(picker, record){
/*
* If we're doing single selection, the selection change events won't fire when
* clicking on the selected element. Detect it here.
*/
var me = this,
selection = me.picker.getSelectionModel().getSelection(),
valueField = me.valueField;
if (!me.multiSelect && selection.length) {
if (record.get(valueField) === selection[0].get(valueField)) {
// Make sure we also update the display value if it's only partial
me.displayTplData = [record.data];
me.setRawValue(me.getDisplayValue());
me.collapse();
}
}
},
matchFieldWidth : false,
onListSelectionChange: function(list, selectedRecords) {
var me = this,
isMulti = me.multiSelect,
hasRecords = selectedRecords.length > 0;
// Only react to selection if it is not called from setValue, and if our list is
// expanded (ignores changes to the selection model triggered elsewhere)
if (!me.ignoreSelection && me.isExpanded) {
if (!isMulti) {
Ext.defer(me.collapse, 1, me);
}
/*
* Only set the value here if we're in multi selection mode or we have
* a selection. Otherwise setValue will be called with an empty value
* which will cause the change event to fire twice.
*/
if (isMulti || hasRecords) {
me.setValue(selectedRecords, false);
}
if (hasRecords) {
me.fireEvent('select', me, selectedRecords);
}
me.inputEl.focus();
}
console.log(me.getValue());
},
doAutoSelect: function() {
var me = this,
picker = me.picker,
lastSelected, itemNode;
if (picker && me.autoSelect && me.store.getCount() > 0) {
// Highlight the last selected item and scroll it into view
lastSelected = picker.getSelectionModel().lastSelected;
itemNode = picker.view.getNode(lastSelected || 0);
if (itemNode) {
picker.view.highlightItem(itemNode);
picker.view.el.scrollChildIntoView(itemNode, false);
}
}
}
});
下拉表格也是继承了Ext.form.field.ComboBox这个类,重写了createPicker方法。
开发下拉树和下拉表格看起来so easy,只要研究透了Ext的运行机制,一切都会so easy
控件效果
实例下载
实例中的资源为myeclipse项目,导入即可运行,自己添加ext的js和css文件,实例中没有ext的基础文件。
下载地址
相关文章
JavaScript的Ext JS框架中的GridPanel组件使用指南
GridPanel和TreePnal功能类似,都是Ext JS中的表格便携利器,相比之下GridPanel还要更强大并且更复杂一些,下面我们就来整理一下JavaScript的Ext JS框架中的GridPanel组件使用指南2016-05-05常用Extjs工具:Extjs.util.Format使用方法
常用Extjs工具:Extjs.util.Format使用方法,需要的朋友可以参考下2012-03-03extjs DataReader、JsonReader、XmlReader的构造方法
DataReader、JsonReader、XmlReader的构造方法,需要的朋友可以参考下。2009-11-11ExtJs3.0中Store添加 baseParams 的Bug
今天发现了一个ExtJS3.0中的Bug 以前用2.0的时候,喜欢这样增加参数2010-03-03
最新评论