您好StackOverFlow社区，
嗯，我认为我需要制作一个DataPicker，它只显示当前月份和一个月前的日期，就在今年，这就是问题：只是告诉我现在的日子或过去的日子没有未来的日期。
我从Ext.Picker.Date文件中创建了'自己''xtype'。现在我只有现在的一年，现在的月份和一个飞蛾，但是如果我选择每个月的前几个月，如果我选择现在的每个星期显示直到现在的一天，我就无法做到这一点< / p>
请有人帮助我。
这是我的代码：
Ext.define('myMoney.view.MyCal', {
extend: 'Ext.picker.Picker',
xtype: 'myCal',
requires: ['Ext.DateExtras'],
config: {
yearFrom: new Date().getFullYear(),
yearTo: new Date().getFullYear(),
monthText: 'Mes',
dayText: 'Dias',
yearText: 'Años',
slotOrder: ['month', 'day', 'year']
},
initialize: function() {
this.callParent();
this.on({
scope: this,
delegate: '> slot',
slotpick: this.onSlotPick
});
},
setValue: function(value, animated) {
if (Ext.isDate(value)) {
value = {
day : value.getDate(),
month: value.getMonth() + 1,
year : value.getFullYear()
};
}
this.callParent([value, animated]);
},
getValue: function(useDom) {
var values = {},
items = this.getItems().items,
ln = items.length,
daysInMonth, day, month, year, item, i;
for (i = 0; i < ln; i++) {
item = items[i];
if (item instanceof Ext.picker.Slot) {
values[item.getName()] = item.getValue(useDom);
}
}
//if all the slots return null, we should not reutrn a date
if (values.year === null && values.month === null && values.day === null) {
return null;
}
year = Ext.isNumber(values.year) ? values.year : 1;
month = Ext.isNumber(values.month) ? values.month : 1;
day = Ext.isNumber(values.day) ? values.day : 1;
if (month && year && month && day) {
daysInMonth = this.getDaysInMonth(month, year);
}
day = (daysInMonth) ? Math.min(day, daysInMonth): day;
return new Date(year, month - 1, day);
},
/**
* Updates the yearFrom configuration
*/
updateYearFrom: function() {
if (this.initialized) {
this.createSlots();
}
},
/**
* Updates the yearTo configuration
*/
updateYearTo: function() {
if (this.initialized) {
this.createSlots();
}
},
/**
* Updates the monthText configuration
*/
updateMonthText: function(newMonthText, oldMonthText) {
var innerItems = this.getInnerItems,
ln = innerItems.length,
item, i;
//loop through each of the current items and set the title on the correct slice
if (this.initialized) {
for (i = 0; i < ln; i++) {
item = innerItems[i];
if ((typeof item.title == "string" && item.title == oldMonthText) || (item.title.html == oldMonthText)) {
item.setTitle(newMonthText);
}
}
}
},
/**
* Updates the dayText configuraton
*/
updateDayText: function(newDayText, oldDayText) {
var innerItems = this.getInnerItems,
ln = innerItems.length,
item, i;
//loop through each of the current items and set the title on the correct slice
if (this.initialized) {
for (i = 0; i < ln; i++) {
item = innerItems[i];
if ((typeof item.title == "string" && item.title == oldDayText) || (item.title.html == oldDayText)) {
item.setTitle(newDayText);
}
}
}
},
/**
* Updates the yearText configuration
*/
updateYearText: function(yearText) {
var innerItems = this.getInnerItems,
ln = innerItems.length,
item, i;
//loop through each of the current items and set the title on the correct slice
if (this.initialized) {
for (i = 0; i < ln; i++) {
item = innerItems[i];
if (item.title == this.yearText) {
item.setTitle(yearText);
}
}
}
},
// @private
constructor: function() {
this.callParent(arguments);
this.createSlots();
},
/**
* Generates all slots for all years specified by this component, and then sets them on the component
* @private
*/
createSlots: function() {
var me = this,
slotOrder = this.getSlotOrder(),
yearsFrom = me.getYearFrom(),
yearsTo = me.getYearTo(),
years = [],
days = [],
months = [],
ln, tmp, i,
daysInMonth;
// swap values if user mixes them up.
if (yearsFrom > yearsTo) {
tmp = yearsFrom;
yearsFrom = yearsTo;
yearsTo = tmp;
}
for (i = yearsFrom; i <= yearsTo; i++) {
years.push({
text: i,
value: i
});
}
daysInMonth = this.getDaysInMonth(1, new Date().getFullYear());
for (i = 0; i < daysInMonth; i++) {
days.push({
text: i + 1,
value: i + 1
});
}
//Aqui estoy editando el mes para que solo muestre el mes actual y el anterior
var ahora = new Date();
var miMes = ahora.getMonth();
var miMesCorto = Ext.Date.getShortMonthName(miMes);
var miNumMes = Ext.Date.monthNumbers[miMesCorto];
for (i = miNumMes-1, ln = miNumMes+1; i < ln; i++) {
months.push({
text: Ext.Date.monthNames[i],
value: i + 1
});
}
var slots = [];
slotOrder.forEach(function(item) {
slots.push(this.createSlot(item, days, months, years));
}, this);
me.setSlots(slots);
},
/**
* Returns a slot config for a specified date.
* @private
*/
createSlot: function(name, days, months, years) {
switch (name) {
case 'year':
return {
name: 'year',
align: 'center',
data: years,
title: this.getYearText(),
flex: 3
};
case 'month':
return {
name: name,
align: 'right',
data: months,
title: this.getMonthText(),
flex: 4
};
case 'day':
return {
name: 'day',
align: 'center',
data: days,
title: this.getDayText(),
flex: 2
};
}
},
onSlotPick: function() {
var value = this.getValue(true),
slot = this.getDaySlot(),
year = value.getFullYear(),
month = value.getMonth(),
days = [],
daysInMonth, i;
if (!value || !Ext.isDate(value) || !slot) {
return;
}
//get the new days of the month for this new date
//Hay que asegurarse que no tome una fecha en futuro
daysInMonth = this.getDaysInMonth(month + 1, year);
for (i = 0; i < daysInMonth; i++) {
days.push({
text: i + 1,
value: i + 1
});
}
// We dont need to update the slot days unless it has changed
if (slot.getData().length == days.length) {
return;
}
// Now we have the correct amounnt of days for the day slot, lets update it
var store = slot.getStore(),
viewItems = slot.getViewItems(),
valueField = slot.getValueField(),
index, item;
slot.setData(days);
index = store.find(valueField, value.getDate());
if (index == -1) {
return;
}
item = Ext.get(viewItems[index]);
slot.selectedIndex = index;
slot.scrollToItem(item);
// slot._value = value;
},
getDaySlot: function() {
var innerItems = this.getInnerItems(),
ln = innerItems.length,
i, slot;
if (this.daySlot) {
return this.daySlot;
}
for (i = 0; i < ln; i++) {
slot = innerItems[i];
if (slot.isSlot && slot.getName() == "day") {
this.daySlot = slot;
return slot;
}
}
return null;
},
// @private
getDaysInMonth: function(month, year) {
var daysInMonth = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
return month == 2 && this.isLeapYear(year) ? 29 : daysInMonth[month-1];
},
// @private
isLeapYear: function(year) {
return !!((year & 3) === 0 && (year % 100 || (year % 400 === 0 && year)));
},
onDoneButtonTap: function() {
var oldValue = this._value,
newValue = this.getValue(true),
testValue = newValue;
if (Ext.isDate(newValue)) {
testValue = newValue.toDateString();
}
if (Ext.isDate(oldValue)) {
oldValue = oldValue.toDateString();
}
if (testValue != oldValue) {
this.fireEvent('change', this, newValue);
}
this.hide();
}
});
我知道，源代码很大，但是有人可以告诉我应该怎样做才能解决这个问题？