我不知道创建treepanel pickerfield的正确方法。现在我这样做：
{
xtype:'pickerfield',
width:'34%',
emptyText: 'Choose layer',
createPicker: function(){
return Ext.create('Ext.tree.Panel',{
hidden: true,
floating: true,
minHeight: 300,
pickerField: this,
root: {
text: 'Root',
expanded: true,
children:[{
text: 'Standard',
expanded: true,
children: [{
text: 'Open Street Map',
checked: true,
leaf: true,
itemId: 'OMS'
},{
text: 'MapQuest',
leaf: false,
children:[{
text: 'Road',
leaf:true,
checked: false,
itemId: 'MapQuest',
val: 'osm'
},{
text: 'Satellite',
leaf:true,
checked: false,
itemId: 'MapQuest',
val: 'sat'
},{
text: 'Hybride',
leaf:true,
checked: false,
itemId: 'MapQuest',
val: 'hyb'
}]
}]
}]
}
});
}
}
部分工作。当我第一次点击选择器时，它会向我显示一个treepanel，但是当我展开一些节点（leaf = false）时，它会被关闭。当我检查树叶时也是如此 - 我不希望这样，因为允许用户检查多个节点。此外，即使我检查一些叶子，选择器的值保持不变（它一直显示emptyText值）。那么，如何解决这一切呢？
答案 0 :(得分：3)
您可以使用以下示例：
Ext.define('Ext.ux.TreeCombo',
{
extend: 'Ext.form.field.Picker',
alias: 'widget.treecombo',
tree: false,
constructor: function(config)
{
this.addEvents(
{
"itemclick" : true
});
this.listeners = config.listeners;
this.callParent(arguments);
},
records: [],
recursiveRecords: [],
ids: [],
selectChildren: true,
canSelectFolders: true,
multiselect: false,
displayField: 'text',
valueField: 'id',
treeWidth: 300,
matchFieldWidth: false,
treeHeight: 400,
masN: 0,
recursivePush: function(node, setIds)
{
var me = this;
me.addRecRecord(node);
if(setIds) me.addIds(node);
node.eachChild(function(nodesingle)
{
if(nodesingle.hasChildNodes() == true)
{
me.recursivePush(nodesingle, setIds);
}
else
{
me.addRecRecord(nodesingle);
if(setIds) me.addIds(nodesingle);
}
});
},
recursiveUnPush: function(node)
{
var me = this;
me.removeIds(node);
node.eachChild(function(nodesingle)
{
if(nodesingle.hasChildNodes() == true)
{
me.recursiveUnPush(nodesingle);
}
else me.removeIds(nodesingle);
});
},
addRecRecord: function(record)
{
var me = this;
for(var i=0,j=me.recursiveRecords.length;i<j;i++)
{
var item = me.recursiveRecords[i];
if(item)
{
if(item.getId() == record.getId()) return;
}
}
me.recursiveRecords.push(record);
},
afterLoadSetValue: false,
setValue: function(valueInit)
{
if(typeof valueInit == 'undefined') return;
var me = this,
tree = this.tree,
values = (valueInit == '') ? [] : valueInit.split(','),
valueFin = [];
inputEl = me.inputEl;
if(tree.store.isLoading())
{
me.afterLoadSetValue = valueInit;
}
if(inputEl && me.emptyText && !Ext.isEmpty(values))
{
inputEl.removeCls(me.emptyCls);
}
if(tree == false) return false;
var node = tree.getRootNode();
if(node == null) return false;
me.recursiveRecords = [];
me.recursivePush(node, false);
me.records = [];
Ext.each(me.recursiveRecords, function(record)
{
var id = record.get(me.valueField),
index = values.indexOf(''+id);
if(me.multiselect == true) record.set('checked', false);
if(index != -1)
{
valueFin.push(record.get(me.displayField));
if(me.multiselect == true) record.set('checked', true);
me.addRecord(record);
}
});
me.value = valueInit;
me.setRawValue(valueFin.join(', '));
me.checkChange();
me.applyEmptyText();
return me;
},
getValue: function()
{
return this.value;
},
getSubmitValue: function()
{
return this.value;
},
checkParentNodes: function(node)
{
if(node == null) return;
var me = this,
checkedAll = true;
node.eachChild(function(nodesingle)
{
var id = nodesingle.getId(),
index = me.ids.indexOf(''+id);
if(index == -1) checkedAll = false;
});
if(checkedAll == true)
{
me.addIds(node);
me.checkParentNodes(node.parentNode);
}
else
{
me.removeIds(node);
me.checkParentNodes(node.parentNode);
}
},
initComponent: function()
{
var me = this;
me.tree = Ext.create('Ext.tree.Panel',
{
alias: 'widget.assetstree',
hidden: true,
minHeight: 300,
rootVisible: (typeof me.rootVisible != 'undefined') ? me.rootVisible : true,
floating: true,
useArrows: true,
width: me.treeWidth,
autoScroll: true,
height: me.treeHeight,
store: me.store,
listeners:
{
load: function(store, records)
{
if(me.afterLoadSetValue != false)
{
me.setValue(me.afterLoadSetValue);
}
},
itemclick: function(view, record, item, index, e, eOpts)
{
me.itemTreeClick(view, record, item, index, e, eOpts, me)
}
}
});
if(me.tree.getRootNode().get('checked') != null) me.multiselect = true;
this.createPicker = function()
{
var me = this;
return me.tree;
};
this.callParent(arguments);
},
addIds: function(record)
{
var me = this;
if(me.ids.indexOf(''+record.getId()) == -1) me.ids.push(''+record.get(me.valueField));
},
removeIds: function(record)
{
var me = this,
index = me.ids.indexOf(''+record.getId());
if(index != -1)
{
me.ids.splice(index, 1);
}
},
addRecord: function(record)
{
var me = this;
for(var i=0,j=me.records.length;i<j;i++)
{
var item = me.records[i];
if(item)
{
if(item.getId() == record.getId()) return;
}
}
me.records.push(record);
},
removeRecord: function(record)
{
var me = this;
for(var i=0,j=me.records.length;i<j;i++)
{
var item = me.records[i];
if(item && item.getId() == record.getId()) delete(me.records[i]);
}
},
itemTreeClick: function(view, record, item, index, e, eOpts, treeCombo)
{
var me = treeCombo,
checked = !record.get('checked');//it is still not checked if will be checked in this event
if(me.multiselect == true) record.set('checked', checked);//check record
var node = me.tree.getRootNode().findChild(me.valueField, record.get(me.valueField), true);
if(node == null)
{
if(me.tree.getRootNode().get(me.valueField) == record.get(me.valueField)) node = me.tree.getRootNode();
else return false;
}
if(me.multiselect == false) me.ids = [];
//if it can't select folders and it is a folder check existing values and return false
if(me.canSelectFolders == false && record.get('leaf') == false)
{
me.setRecordsValue(view, record, item, index, e, eOpts, treeCombo);
return false;
}
//if record is leaf
if(record.get('leaf') == true)
{
if(checked == true)
{
me.addIds(record);
}
else
{
me.removeIds(record);
}
}
else //it's a directory
{
me.recursiveRecords = [];
if(checked == true)
{
if(me.multiselect == false)
{
if(me.canSelectFolders == true) me.addIds(record);
}
else
{
if(me.canSelectFolders == true)
{
me.recursivePush(node, true);
}
}
}
else
{
if(me.multiselect == false)
{
if(me.canSelectFolders == true) me.recursiveUnPush(node);
else me.removeIds(record);
}
else me.recursiveUnPush(node);
}
}
//this will check every parent node that has his all children selected
if(me.canSelectFolders == true && me.multiselect == true) me.checkParentNodes(node.parentNode);
me.setRecordsValue(view, record, item, index, e, eOpts, treeCombo);
},
fixIds: function()
{
var me = this;
for(var i=0,j=me.ids.length;i<j;i++)
{
if(me.ids[i] == 'NaN') me.ids.splice(i, 1);
}
},
setRecordsValue: function(view, record, item, index, e, eOpts, treeCombo)
{
var me = treeCombo;
me.fixIds();
me.setValue(me.ids.join(','));
me.fireEvent('itemclick', me, record, item, index, e, eOpts, me.records, me.ids);
if(me.multiselect == false) me.onTriggerClick();
}
});
var storeMenu = Ext.create('Ext.data.TreeStore',
{
root:
{
text: 'Root',
id: '0',
expanded: true,
children:
[
{id: '1', text: 'First node', leaf: false, children:
[
{id: '3', text: 'First child node', leaf: true},
{id: '4', text: 'Second child node', leaf: true}
]
},
{id: '2', text: 'Second node', leaf: true}
]
},
folderSort: false
});
Ext.onReady(function() {
Ext.create('Ext.ux.TreeCombo', {
margin:10,
width:120,
height: 10,
treeHeight: 10,
treeWidth: 240,
renderTo: 'treecombo3',
store: storeMenu,
selectChildren: false,
canSelectFolders: true
,itemTreeClick: function(view, record, item, index, e, eOpts, treeCombo)
{
var id = record.data.id;
}
});
});