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ExtJS自定义控件 之一:datetimefield控件

时间:2016-05-06 16:22:49      阅读:271      评论:0      收藏:0      [点我收藏+]

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这一年都在使用ExtJS 5.0开发系统,经常会遇到的一个场景就是时间日期的选择了。比如说,预定场地的时候就必须由用户选择预定的日期和时间。

可惜的是,ExtJS 5.0没有自带一个可以同时选择日期时间的控件(ExtJS 6.0已经推出了,还没用过,不知道加入这种控件没~),通常偷懒的做法就是,先放一个日期控件,然后再放一个时间控件。用户使用的时候,先选择日期,再选择时间,最后用很别扭的办法将日期和时间拼装起来。

理想的状态是,提供给用户一个可以同时选择时间和日期的控件,并且数据是“日期+时间”的Date类型。既符合使用习惯,又方便开发。

故第二种偷懒的方式是,从网上扒一个现成的解决方案来用。此法最快,但是在过程中遇到了一个问题,现成可以搜索到的方案都有点旧,大多数还停留在ExtJS 2.X、3.X和4.X版本,自从ExtJS从4升级到5之后,API改变了许多,所以并不能直接使用。

最后只能是自己写一个。准确来说,应该是拿了一份现成的代码修改,这个代码在ExtJS 5.0下不能正确运行,但是需要修改的量非常少,所以很感谢这份现成代码的作者,可惜没有署名,不知道是谁。

ExtJS 5.0上测试成功,实现方法是:

1、自定义一个时间选择器TimePickerField,继承自Ext.form.field.Base,由三个NumberField组成。

    Ext.define(‘MyApp.ux.DateTimeField.TimePickerField‘, {
        extend: ‘Ext.form.field.Base‘,
        alias: ‘widget.timepicker‘,

        alternateClassName: ‘Ext.form.field.TimePickerField‘,

        requires: [‘Ext.form.field.Number‘],
        inputType: ‘text‘,
        fieldLabel: ‘时间‘,
        labelWidth: 40,
        style: ‘padding:4px 0; margin: 0; ‘,
        value: null,
        spinnerCfg: {
            width: 50,
        },

        initComponent: function() {
            var me = this;
            me.value = me.value || Ext.Date.format(new Date(), ‘H:i:s‘);
            me.callParent(arguments);
            me.spinners = [];
            var cfg = Ext.apply({}, me.spinnerCfg, {
    //          readOnly: me.readOnly,
                disabled: me.disabled,
                style: ‘float: left‘,
                listeners: {
                  change: {
                    fn: me.onSpinnerChange,
                    scope: me
                  }
                }
            });
            me.hoursSpinner = Ext.create(‘Ext.form.field.Number‘, Ext.apply({}, cfg, {
    //          minValue: -1,
    //          maxValue: 24,
                    minNum: 0,
                    maxNum: 23,
              }));
            me.minutesSpinner = Ext.create(‘Ext.form.field.Number‘, Ext.apply({}, cfg, {
    //          minValue: -1,
    //          maxValue: 60,
                        minNum: 0,
                        maxNum: 59,
              }));
            me.secondsSpinner = Ext.create(‘Ext.form.field.Number‘, Ext.apply({}, cfg, {
    //          minValue: -1,
    //          MAXVALUE: 60,
                        minNum: 0,
                        maxNum: 59,
              }));
            me.spinners.push(me.hoursSpinner, me.minutesSpinner, me.secondsSpinner);
        },

        onRender: function() {
            var me = this, spinnerWrapDom, spinnerWrap;
            me.callParent(arguments);
            spinnerWrap = Ext.get(Ext.DomQuery.selectNode(‘div‘, this.el.dom));
            me.callSpinnersFunction(‘render‘, spinnerWrap);
            this.el.dom.getElementsByTagName(‘input‘)[0].style.display = ‘none‘;
            var newTimePicker = Ext.DomHelper.append(spinnerWrap, {
                tag: ‘div‘,
                cls: ‘x-form-clear-left‘
            }, true);
            this.setRawValue(this.value);
        },
        _valueSplit: function(v) {
            if(Ext.isDate(v)) {
              v = Ext.Date.format(v, ‘H:i:s‘);
            }
            var split = v.split(‘:‘);
            return {
                h: split.length > 0 ? split[0] : 0,
                m: split.length > 1 ? split[1] : 0,
                s: split.length > 2 ? split[2] : 0
            };
        },
        onSpinnerChange: function() {
            if(!this.rendered) {
              return;
            }
            //限制时间范围
            var args = arguments; //this, newValue, oldValue, eOpts
            args[0].setValue( (args[1]>args[0].maxNum) ? args[0].minNum : args[0].value );
            args[0].setValue( (args[1]<args[0].minNum) ? args[0].maxNum : args[0].value );
            this.fireEvent(‘change‘, this, this.getValue(), this.getRawValue());
        },

        // 依次调用各输入框函数, call each spinner‘s function
        callSpinnersFunction: function(funName, args) {
            for(var i = 0; i < this.spinners.length; i++) {
                if( this.spinners[i][funName] != null && this.spinners[i][funName] != undefined ){
                    this.spinners[i][funName](args);
                }
            }
        },

        getRawValue: function() {
            if(!this.rendered) {
                var date = this.value || new Date();
                return this._valueSplit(date);
            }
            else {
                return {
                h: this.hoursSpinner.getValue(),
                m: this.minutesSpinner.getValue(),
                s: this.secondsSpinner.getValue()
                };
            }
        },
        setRawValue: function(value) {
            var v = this._valueSplit(value);
            if(this.hoursSpinner) {
                this.hoursSpinner.setValue(v.h);
                this.minutesSpinner.setValue(v.m);
                this.secondsSpinner.setValue(v.s);
            }
        },

        getValue: function() {
            var v = this.getRawValue();
            return Ext.String.leftPad(v.h, 2, ‘0‘) + ‘:‘ + Ext.String.leftPad(v.m, 2, ‘0‘) + ‘:‘
            + Ext.String.leftPad(v.s, 2, ‘0‘);
        },

        setValue: function(value) {
            this.value = Ext.isDate(value) ? Ext.Date.format(value, ‘H:i:s‘) : value;
            if(!this.rendered) {
                return;
            }
            this.setRawValue(this.value);
            this.validate();
        },

        disable: function() {
            this.callParent(arguments);
            this.callSpinnersFunction(‘disable‘, arguments);
        },

        enable: function() {
            this.callParent(arguments);
            this.callSpinnersFunction(‘enable‘, arguments);
        },

        setReadOnly: function() {
            this.callParent(arguments);
            this.callSpinnersFunction(‘setReadOnly‘, arguments);
        },

        clearInvalid: function() {
            this.callParent(arguments);
            this.callSpinnersFunction(‘clearInvalid‘, arguments);
        },

        isValid: function(preventMark) {
            return this.hoursSpinner.isValid(preventMark) && this.minutesSpinner.isValid(preventMark)
            && this.secondsSpinner.isValid(preventMark);
        },

        validate: function() {
            return this.hoursSpinner.validate() && this.minutesSpinner.validate() && this.secondsSpinner.validate();
        }
    });

2、自定义一个DateTimePicker,继承自Ext.picker.Date,实际上就是在原有的DateField的基础上增加TimePicker和一个确认按键。

    Ext.define(‘MyApp.ux.DateTimeField.DateTimePicker‘, {
        extend: ‘Ext.picker.Date‘,
        alias: ‘widget.datetimepicker‘,
        requires: [‘MyApp.ux.DateTimeField.TimePickerField‘,‘Ext.dom.Query‘],

        todayText: ‘现在‘,
        timeLabel: ‘时间‘,
        buttonText: ‘确定‘,

        initComponent: function() {
            this.callParent();
            this.value = this.value || new Date();
        },
        onRender: function(container, position) {
            this.callParent(arguments);
            var me = this;


            //确认按键
            var btnCfg = Ext.apply({}, {}, {
                style: ‘center‘,
                listeners: {
                    click: {
                        fn: function(){
                            this.confirmDate();
                        },
                        scope: me
                    }
                }
                });
            me.confirmBtn = Ext.create(‘Ext.Button‘, Ext.apply({}, btnCfg, {
                text: ‘确认‘,
            }));
            me.confirmBtn.render(this.el.child(‘div div.x-datepicker-footer‘));


            if(!this.timefield) {
                this.timefield = Ext.create(‘MyApp.ux.DateTimeField.TimePickerField‘, {
                    fieldLabel: this.timeLabel,
                    labelWidth: 40,
                    value: Ext.Date.format(this.value, ‘H:i:s‘),
                });
            }

            this.timefield.ownerCt = this;//指定范围
            this.timefield.on(‘change‘, this.timeChange, this);//

            var table = Ext.get(Ext.DomQuery.selectNode(‘table‘, this.el.dom));

            var tfEl = Ext.DomHelper.insertAfter(table, {
                tag: ‘div‘,
                style: ‘border:0px;‘,
                children: [{
                    tag: ‘div‘,
                    cls: ‘x-datepicker-footer ux-timefield‘
                }]
            }, true);
            this.timefield.render(this.el.child(‘div div.ux-timefield‘));

            var p = this.getEl().parent(‘div.x-layer‘);
            if(p) {
                p.setStyle("height", p.getHeight() + 31);
            }
        },
        // listener 时间域修改, timefield change
        timeChange: function(tf, time, rawtime) {
            this.value = this.fillDateTime(this.value);
        },
        fillDateTime: function(value) {
            if(this.timefield) {
                var rawtime = this.timefield.getRawValue();
                value.setHours(rawtime.h);
                value.setMinutes(rawtime.m);
                value.setSeconds(rawtime.s);
            }
            return value;
        },
        changeTimeFiledValue: function(value) {
            this.timefield.un(‘change‘, this.timeChange, this);
            this.timefield.setValue(this.value);
            this.timefield.on(‘change‘, this.timeChange, this);
        },
        setValue: function(value) {
            this.value = value;
            this.changeTimeFiledValue(value);
            return this.update(this.value);
        },
        getValue: function() {
            return this.fillDateTime(this.value);
        },
        handleDateClick: function(e, t) {
            var me = this,
                handler = me.handler;
            e.stopEvent();
            if(!me.disabled && t.dateValue && !Ext.fly(t.parentNode).hasCls(me.disabledCellCls)) {
                me.doCancelFocus = me.focusOnSelect === false;
                me.setValue(this.fillDateTime(new Date(t.dateValue)));
                delete me.doCancelFocus;
                me.fireEvent(‘select‘, me, me.value);
                if(handler) {
                handler.call(me.scope || me, me, me.value);
                }
                me.onSelect();
            }
        },
        //确认按键 
        confirmDate: function(){
                var that = this;
                    that.fireEvent(‘select‘, that, that.value);//模拟用户选择
                    that.onSelect();
        },
        selectToday: function() {
            var me = this,
                btn = me.todayBtn,
                handler = me.handler;
            if(btn && !btn.disabled) {
                me.setValue(new Date());
                me.fireEvent(‘select‘, me, me.value);
                if(handler) {
                handler.call(me.scope || me, me, me.value);
                }
                me.onSelect();
            }
            return me;
        }
    });

3、将DateTimePicker装载到Ext.form.field.Date中,初始化日期时间的格式。

    Ext.define(‘MyApp.ux.DateTimeField.DateTimeField‘, {
            extend: ‘Ext.form.field.Date‘,
            alias: ‘widget.datetimefield‘,
            requires: [‘MyApp.ux.DateTimeField.DateTimePicker‘],
            initComponent: function() {
                this.format = this.format;
                this.callParent();
            },
            format: ‘Y-m-d H:i:s‘,
            createPicker: function() {
                var me = this,
                        format = Ext.String.format;
                return Ext.create(‘MyApp.ux.DateTimeField.DateTimePicker‘, {
                        ownerCt: me.ownerCt,
    //                  renderTo: document.body,
                        floating: true,
    //                  hidden: true,
                        focusOnShow: true,
                        minDate: me.minValue,
                        maxDate: me.maxValue,
                        disabledDatesRE: me.disabledDatesRE,
                        disabledDatesText: me.disabledDatesText,
                        disabledDays: me.disabledDays,
                        disabledDaysText: me.disabledDaysText,
                        format: me.format,
                        showToday: me.showToday,
                        startDay: me.startDay,
                        minText: format(me.minText, me.formatDate(me.minValue)),
                        maxText: format(me.maxText, me.formatDate(me.maxValue)),
                        listeners: {
                                scope: me,
                                select: me.onSelect
                        },
                        keyNavConfig: {
                                esc: function() {
                                    me.collapse();
                                }
                        }
                    });
            }
    });

将以上代码拷到ux当中,调用的时候可以Ext.create之,也可以require之后直接使用alias。
效果嘛,就像下图那样:
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介绍完毕。
谢谢大家。
技术分享

ExtJS自定义控件 之一:datetimefield控件

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原文地址:http://blog.csdn.net/yangholmes_blog/article/details/51330555

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