layout - एक्स्टजेएस 4 में कस्टम अतिप्रवाहहैंडलर कार्यान्वयन



extjs extjs4 (1)

हमें टूलबार लेआउट के लिए ओवरफ्लोहैंडर को कार्यान्वित करने की आवश्यकता है, जो दूसरे टूलबार को जोड़ देगा और पहले उपकरण पट्टी से द्वार को लपेटेगा जब उन्हें प्रदर्शित नहीं किया जा सकता क्योंकि टूलबार के कंटेनर की पर्याप्त चौड़ाई नहीं है सबसे पहले, हमें Ext.panel.Panel को ओवरराइड करना होगा:

Ext4.override(Ext4.panel.Panel, {
    bridgeToolbars: function () {
        var toolbar;
        this.callParent(arguments);
        if (this.tbar2) {
            if (Ext4.isArray(this.tbar2)) {
                toolbar = {
                    xtype: 'toolbar',
                    items: this.tbar2
                };
            } else if (!toolbar.xtype) {
                toolbar.xtype = 'toolbar';
            }
            toolbar.dock = 'top';
            toolbar.isTbar2 = true;
            this.dockedItems = this.dockedItems.concat(toolbar);
            this.tbar2 = null;
        }
    },
    onRender: function () {
        this.callParent(arguments);
        var topBars = this.getDockedItems('toolbar[dock="top"]'),
            i,
            len;
        for (i = 0, len = topBars.length; i < len; i++) {
            if (topBars[i].isTbar2) {
                this.tbar2 = topBars[i];
                break;
            }
        }
    },
    /**
     * Creates, if not exists, and returns toolbar at passed position
     * @param {Ext.panel.Panel} panel
     * @param {String} position
     * @return {Ext.toolbar.Toolbar}
     */
    getDynamicTBar: function (position) {
        var panel = this,
            params,
            tb;
        position = position || 'top';
        if (position === 'tbar2') {
            tb = panel.tbar2;
            params = {
                dock: 'top',
                isTbar2: true,
                layout: {
                    overflowHandler: 'Scroller'
                }
            };
        } else {
            tb = panel.getDockedItems('toolbar[dock="' + position + '"]');
            params = {
                dock: position
            };
            if (tb.length > 0) {
                tb = tb[0];
            }
        }
        if (!tb) {
            tb = Ext4.create('Ext4.toolbar.Toolbar', params);
            panel.addDocked(tb);
            if (position === 'tbar2') {
                panel.tbar2 = tb;
            }
        }
        return tb;
    }
});

अगला, हमें क्लास Ext4.layout.container.boxOverflow.TBar2 बनाने की आवश्यकता है (यह बहुत लंबा नाम है क्योंकि ExtJS खोजों को हेन्डलफ़ो (जो स्ट्रिंग का उदाहरण है) को हार्डकोड एक्स्ट 4। लेआउट। कॉन्टैनेयर.बॉक्सओवरफ्लो नेमस्पेस में है)।

/**
 * @class Ext4.layout.container.boxOverflow.TBar2
 * Class for using as overflowHandler
 * @extends Ext.layout.container.boxOverflow.None
 */
Ext4.define('Ext4.layout.container.boxOverflow.TBar2', {
    extend: 'Ext4.layout.container.boxOverflow.None',

    /**
     * @private
     * @property {Boolean} initialized
     */
    initialized: false,

    constructor: function () {
        /**
         * @private
         * @property {Array} tbar2Items
         * List of moved components
         */
        this.tbar2Items = [];
        return this.callParent(arguments);
    },

    beginLayout: function (ownerContext) {
        if (!this.initialized) {
            this.layout.owner.ownerCt.on('afterlayout', this.createTBar2, this);
            this.initialized = true;
        }
        this.callParent(arguments);
        this.clearOverflow(ownerContext);
    },

    beginLayoutCycle: function (ownerContext, firstCycle) {
        this.callParent(arguments);
        if (!firstCycle) {
            this.clearOverflow(ownerContext);
            this.layout.cacheChildItems(ownerContext);
        }
    },

    getOverflowCls: function () {
        return Ext4.baseCSSPrefix + this.layout.direction + '-box-overflow-body';
    },

    /**
     * @private
     * @property {Object} _asLayoutRoot
     */
    _asLayoutRoot: {
        isRoot: true
    },

    clearOverflow: function () {
        // If afterlayout is not processing and tbar2 already created,
        // we can to move components from tbar2 to first toolbar, because now
        // there isn't any overflow
        if (!this.processing && this.tbar2) {
            this.tbar2.items.each(function (item) {
                this.tbar1.add(item);
                // change ui from saved property, or CSS will be incorrect
                item.ui = item.origUI;
            }, this);
            this.tbar2.removeAll(false);
            this.tbar2.hide();
        }
        this.tbar2Items.length = 0;
    },

    /**
     * @private
     * Creates tbar2 and does other routines
     */
    createTBar2: function () {
        // if afterlayout event is still processing,
        // or we don't need to handle toolbar overflow, just return from function
        if (this.processing || !this.doTbar2) {
            return;
        }
        this.processing = true;
        this.doTbar2 = false;
        var me = this,
            ownerContext = this.mOwnerContext,
            layout = me.layout,
            owner = layout.owner,
            names = layout.getNames(),
            startProp = names.x,
            sizeProp = names.width,
            plan = ownerContext.state.boxPlan,
            available = plan.targetSize[sizeProp],
            childItems = ownerContext.childItems,
            len = childItems.length,
            childContext,
            comp, i, props,
            tbarOwner = owner.ownerCt;

        me.tbar1 = owner;
        // save components which will be moved
        owner.suspendLayouts();
        me.tbar2Items.length = 0;
        for (i = 0; i < len; i++) {
            childContext = childItems[i];
            props = childContext.props;
            if (props[startProp] + props[sizeProp] > available) {
                comp = childContext.target;
                me.tbar2Items.push(comp);
                // save original ui property
                comp.origUI = comp.ui;
                owner.remove(comp, false);
            }
        }
        owner.resumeLayouts();

        // add tbar2 to the layout cycle (you can see very similar code in clearOverflow
        // method of Ext.layout.container.boxOverflow.Menu)
        tbarOwner.suspendLayouts();
        me.tbar2 = tbarOwner.getDynamicTBar('tbar2');
        me.tbar2.show();
        // moving components
        Ext4.each(me.tbar2Items, function (item, index) {
            me.tbar2.insert(index, item);
            item.ui = item.origUI;
        });
        tbarOwner.resumeLayouts(this._asLayoutRoot);
        this.processing = false;
    },

    handleOverflow: function (ownerContext) {
        // set flag and store context for later using
        this.doTbar2 = true;
        this.mOwnerContext = ownerContext;
    }

});

कृपया ध्यान दें मैं एक्स्टजेएस 4 बूटस्ट्रैप का उपयोग करता हूं (क्योंकि मेरे वेब ऐप में एक्स्टजेडी 2.3 भी है), इसलिए आपके कोड में आपको एक्स्ट का इस्तेमाल करना चाहिए Ext. Ext4. बजाय

मेरे पास दो toolbars साथ पैनल है I मैं overflowHandler रूप में उपयोग करने के लिए कस्टम क्लास कैसे लागू कर सकता हूं, जो घटकों को पहली टूलबार ओवरफ्लो पर दूसरी टूलबार पर ले जाएगा?

मैंने Ext.layout.container.boxOverflow.Menu कोड का उपयोग करने की कोशिश की, लेकिन मेरी दूसरी टूलबार बस छुपाता है।

यह मेरा कोड है, जिसे ExtJS 4 वितरण से toolbar overflow उदाहरण के साथ मिश्रित किया गया था।

Ext.require(['Ext.window.Window', 'Ext.toolbar.Toolbar', 'Ext.menu.ColorPicker', 'Ext.form.field.Date']);
Ext.onReady(function(){

    /**
     * Override for implementing tbar2 
     */
    Ext.override(Ext.panel.Panel, {
        bridgeToolbars : function () {
            var toolbar;
            this.callParent(arguments);
            if (this.tbar2) {
                if (Ext.isArray(this.tbar2)) {
                    toolbar = {
                        xtype : 'toolbar',
                        items : this.tbar2
                    };
                }
                else if (!toolbar.xtype) {
                    toolbar.xtype = 'toolbar';
                }
                toolbar.dock = 'top';
                toolbar.isTbar2 = true;
                this.dockedItems = this.dockedItems.concat(toolbar);
                this.tbar2 = null;
            }
        },
        onRender       : function () {
            this.callParent(arguments);
            var topBars = this.getDockedItems('toolbar[dock="top"]'),
                i,
                len;
            for (i = 0, len = topBars.length; i < len; i++) {
                if (topBars[i].isTbar2) {
                    this.tbar2 = topBars[i];
                    break;
                }
            }
        },
        /**
         * Lazy creates new toolbar and returns it
         * @param {Ext.panel.Panel} panel
         * @param {String} position
         * @return {Ext.toolbar.Toolbar}
         */
        getDynamicTBar : function (position) {
            var panel = this,
                params,
                tb;
            position = position || 'top';
            if (position === 'tbar2') {
                tb = panel.tbar2;
                params = {dock : 'top', isTbar2 : true};
            }
            else {
                tb = panel.getDockedItems('toolbar[dock="' + position + '"]');
                params = {dock : position};
                if (tb.length > 0) {
                    tb = tb[0];
                }
            }
            if (!tb) {
                console.log('created tb at ' + position);
                tb = Ext.create('Ext.toolbar.Toolbar', params);
                panel.addDocked(tb);
            }
            return tb;
        }
    });

    Ext.define('Ext.layout.container.boxOverflow.TBar2', {
        extend : 'Ext.layout.container.boxOverflow.None',

        constructor : function () {
            this.tbar2Items = [];
            return this.callParent(arguments);
        },

        beginLayout : function (ownerContext) {
            this.callParent(arguments);
            this.clearOverflow(ownerContext);
        },

        beginLayoutCycle : function (ownerContext, firstCycle) {
            this.callParent(arguments);
            if (!firstCycle) {
                this.clearOverflow(ownerContext);
                this.layout.cacheChildItems(ownerContext);
            }
        },

        getOverflowCls : function () {
            return Ext.baseCSSPrefix + this.layout.direction + '-box-overflow-body';
        },

        _asLayoutRoot : { isRoot : true },

        clearOverflow : function () {
            if (this.tbar2) {
                this.tbar2.suspendLayouts();
                this.tbar2.hide();
                this.tbar2.resumeLayouts(this._asLayoutRoot);
            }
            this.tbar2Items.length = 0;
        },

        handleOverflow : function (ownerContext) {

            var me = this,
                layout = me.layout,
                owner = layout.owner,
                names = layout.getNames(),
                startProp = names.x,
                sizeProp = names.width,
                plan = ownerContext.state.boxPlan,
                available = plan.targetSize[sizeProp],
                childItems = ownerContext.childItems,
                len = childItems.length,
                childContext,
                comp, i, props,
                tbarOwner = owner.ownerCt;
            owner.suspendLayouts();
            // Hide all items which are off the end, and store them to allow them to be restored
            // before each layout operation.
            me.tbar2Items.length = 0;
            for (i = 0; i < len; i++) {
                childContext = childItems[i];
                props = childContext.props;
                if (props[startProp] + props[sizeProp] > available) {
                    comp = childContext.target;
                    me.tbar2Items.push(comp);
                    owner.remove(comp, false);
                }
            }
            owner.resumeLayouts();
            if (!me.tbar2 && (tbarOwner instanceof Ext.panel.Panel)) {
                me.tbar2 = tbarOwner.getDynamicTBar('tbar2');
            }
            me.tbar2.suspendLayouts();
            me.tbar2.show();

            Ext.each(me.tbar2Items, function(item, index) {
                me.tbar2.add(item);
            });
            me.tbar2.resumeLayouts(me._asLayoutRoot);
        }

    });


    var handleAction = function(action){
        Ext.example.msg('<b>Action</b>', 'You clicked "' + action + '"');
    };

    var colorMenu = Ext.create('Ext.menu.ColorPicker', {
        handler: function(cm, color){
            Ext.example.msg('Color Selected', '<span style="color:#' + color + ';">You choose {0}.</span>', color);
        }
    });

    var showDate = function(d, value) {
        Ext.example.msg('<b>Action date</b>', 'You picked ' + Ext.Date.format(value, d.format));
    };

    var fromPicker = false;

    Ext.create('Ext.window.Window', {
        title: 'Standard',
        closable: false,
        height:250,
        width: 500,
        bodyStyle: 'padding:10px',
        contentEl: 'content',
        autoScroll: true,
        tbar: Ext.create('Ext.toolbar.Toolbar', {
            layout: {
                overflowHandler: 'TBar2'
            },
            items: [{
                xtype:'splitbutton',
                text: 'Menu Button',
                iconCls: 'add16',
                handler: Ext.Function.pass(handleAction, 'Menu Button'),
                menu: [{text: 'Menu Item 1', handler: Ext.Function.pass(handleAction, 'Menu Item 1')}]
            },'-',{
                xtype:'splitbutton',
                text: 'Cut',
                iconCls: 'add16',
                handler: Ext.Function.pass(handleAction, 'Cut'),
                menu: [{text: 'Cut menu', handler: Ext.Function.pass(handleAction, 'Cut menu')}]
            },{
                text: 'Copy',
                iconCls: 'add16',
                handler: Ext.Function.pass(handleAction, 'Copy')
            },{
                text: 'Paste',
                iconCls: 'add16',
                menu: [{text: 'Paste menu', handler: Ext.Function.pass(handleAction, 'Paste menu')}]
            },'-',{
                text: 'Format',
                iconCls: 'add16',
                handler: Ext.Function.pass(handleAction, 'Format')
            },'->', {
                fieldLabel: 'Action',
                labelWidth: 70,
                width: 180,
                xtype: 'datefield',
                labelSeparator: '',
                enableKeyEvents: true,
                listeners: {
                    expand: function(){
                        fromPicker = true;
                    },
                    collapse: function(){
                        fromPicker = false;  
                    },
                    change: function(d, newVal, oldVal) {
                        if (fromPicker || !d.isVisible()) {
                            showDate(d, newVal);
                        }
                    },
                    keypress: {
                        buffer: 500,
                        fn: function(field){
                            var value = field.getValue();
                            if (value !== null && field.isValid()) {
                                showDate(field, value);
                            }
                        }
                    }
                }
            }, {
                text: 'Sell',
                iconCls: 'money-down',
                enableToggle: true,
                toggleHandler: function(button, pressed) {
                    Ext.example.msg('<b>Action</b>', 'Right ToggleButton ' + (pressed ? 'Buy' : 'Sell'));
                    button.setText(pressed ? 'Buy' : 'Sell')
                    button.setIconCls(pressed ? 'money-up' : 'money-down')
                }
            }, {
                text: 'Choose a Color',
                menu: colorMenu // <-- submenu by reference
            }]
        })
    }).show();
});