ExtJS——阻止组合框在触发点击时加载

Question

我正在使用自定义 "treecombo" 组件。这是来源：

/*
Tree combo
Use with 'Ext.data.TreeStore'


If store root note has 'checked' property tree combo becomes multiselect combo (tree store must have records with 'checked' property)


Has event 'itemclick' that can be used to capture click


Options:
selectChildren - if set true and if store isn't multiselect, clicking on an non-leaf node selects all it's children
canSelectFolders - if set true and store isn't multiselect clicking on a folder selects that folder also as a value


Use:


single leaf node selector:
selectChildren: false
canSelectFolders: false
- this will select only leaf nodes and will not allow selecting non-leaf nodes


single node selector (can select leaf and non-leaf nodes)
selectChildren: false
canSelectFolders: true
- this will select single value either leaf or non-leaf


children selector:
selectChildren: true
canSelectFolders: true
- clicking on a node will select it's children and node, clicking on a leaf node will select only that node


This config:
selectChildren: true
canSelectFolders: false
- is invalid, you cannot select children without node


*/
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();
    }   
});

我正在使用这些自定义组件中的 4 个，所有这些组件都有自己的商店，它们都会在应用程序启动时加载。但是当触发器被点击时，它再次发出加载商店的请求。我怎样才能停止在触发点击时发出请求？数据集很大，商店已经加载，所以它不必要地发出另一个请求。

我也没有看到触发点击事件，否则我本可以检查商店数量并可能返回 false。

提前致谢

Answer 1

在您的组合框中，将此配置添加到提前加载的组合框中。

queryMode: 'local'

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