ExtJS：class 范围内的问题
ExtJS: Issue with scope in class
我一直面临选择具有范围的确切组件的问题。正如您将在下面注意到的，我在 gridpanel 中创建了 2 个不同的函数。其中之一为 confirm 创建了 Ext.MessageBox。其他函数创建 Ext.window.Window 取决于 button 单击 MessageBox。
这里的事情是；它应该 destroy 将 component 与 cancel 和 no 按钮相关联。由于 var me = this 状态，两个按钮总是指向 gridpanel 并破坏 gridpanel 本身。
如何将 destroy 方法直接指向相关的 component？
Ext.define('MyApp.FooGrid', {
extend: 'Ext.grid.Panel',
reference: 'fooGrid',
getGridMenu: function () {
// Here is the 'Update' function; with right-click user being able to see `contextmenu`
var me = this;
var ret = [
{
text: 'Update',
listeners: {
click: me.onUpdate,
scope: me
}
}
];
return me.callParent().concat(ret);
},
onUpdate: function () {
var me = this,
gridRec = this.getSelectionModel().getSelection(); // Here being able to retrieve row data.
Ext.MessageBox.confirm(translations.confirm, translations.confirmChange, me.change, me);
return gridRec;
},
change: function (button) {
var me = this;
var selectedRec = me.onUpdate();
var selectedRecEmail = selectedRec[0].data.email; //Retrieves selected record's email with right-click action
if (button === "yes") {
return new Ext.window.Window({
alias: 'updateWin',
autoShow: true,
title: translations.update,
modal: true,
width: 350,
height: 200,
items: [
{
xtype: 'container',
height: 10
},
{
xtype: 'textfield',
width: 300,
readOnly: true,
value: selectedRecEmail //Display selected record email
},
{
xtype: 'textfield',
width: 300,
fieldLabel: translations.newPassword
}
],
dockedItems: [
{
xtype: 'toolbar',
dock: 'bottom',
items: [
{
xtype: 'tbfill'
},
{
xtype: 'button',
text: translations.cancel,
listeners: {
click: function () {
me.destroy(); // Here is the bug: When user clicks on this button; should destroy current window but it destroys 'gridpanel' itself
}
}
},
{
xtype: 'button',
text: translations.save,
listeners: {
click: function () {
console.log("I'll save you!");
}
}
}
]
}
]
});
} else {
console.log('this is no!');
me.destroy(); // Another bug raises through here: If user will click on No then 'messagebox' should destroy. This one is destroys the gridpanel as well.
}
}
});
How can I point destroy method directly to related component?
首先在确认框按钮的(No)点击，你不需要破坏它会在你点击进入No时自动隐藏框。
对于更新 window 而不是使用 me.destroy() 你需要直接使用 button.up('window').destroy() 所以它只会破坏你的更新 window 而不是 grid .
而且你不需要在 change 函数中再次调用 me.onUpdate() 否则它会再次显示确认框。您可以像这样 me.getSelection().
直接在 change 函数上获取选定的记录
在这个 Fiddle 中，我使用您的代码创建了一个演示，我已经努力得到结果。
代码片段
Ext.application({
name: 'Fiddle',
launch: function () {
Ext.create('Ext.data.Store', {
storeId: 'demostore',
fields: ['name', 'email', 'phone'],
data: [{
name: 'Lisa',
email: 'lisa@simpsons.com',
phone: '555-111-1224'
}, {
name: 'Bart',
email: 'bart@simpsons.com',
phone: '555-222-1234'
}, {
name: 'Homer',
email: 'homer@simpsons.com',
phone: '555-222-1244'
}, {
name: 'Marge',
email: 'marge@simpsons.com',
phone: '555-222-1254'
}]
});
Ext.create('Ext.grid.Panel', {
title: 'Demo GRID',
store: 'demostore',
columns: [{
text: 'Name',
dataIndex: 'name'
}, {
text: 'Email',
dataIndex: 'email',
flex: 1
}, {
text: 'Phone',
dataIndex: 'phone'
}],
height: 200,
listeners: {
itemcontextmenu: function (grid, record, item, index, e, eOpts) {
e.stopEvent();
grid.up('grid').getGridMenu().showAt(e.getXY());
}
},
renderTo: Ext.getBody(),
getGridMenu: function () {
var me = this;
if (!me.contextMenu) {
me.contextMenu = Ext.create('Ext.menu.Menu', {
width: 200,
items: [{
text: 'Update',
handler: me.onUpdate,
scope: me
}]
});
}
return me.contextMenu;
},
onUpdate: function () {
var me = this;
Ext.MessageBox.confirm('Confirmation ', 'Are your sure ?', me.change, me);
},
change: function (button) {
var me = this,
selectedRecEmail = me.getSelection()[0].data.email; //Retrieves selected record's email with right-click action
if (button === "yes") {
return new Ext.window.Window({
autoShow: true,
title: 'Update',
modal: true,
width: 350,
height: 200,
items: [{
xtype: 'tbspacer',
height: 10
}, {
xtype: 'textfield',
width: 300,
readOnly: true,
value: selectedRecEmail //Display selected record email
}, {
xtype: 'textfield',
inputType:'password',
width: 300,
fieldLabel: 'New Password'
}],
dockedItems: [{
xtype: 'toolbar',
dock: 'bottom',
items: [{
xtype: 'tbfill'
}, {
xtype: 'button',
text: 'cancel',
listeners: {
click: function (btn) {
btn.up('window').destroy(); // Here is the bug: When user clicks on this button; should destroy current window but it destroys 'gridpanel' itself
}
}
}, {
xtype: 'button',
text: 'save',
listeners: {
click: function () {
console.log("I'll save you!");
}
}
}]
}]
});
}
}
});
}
});
我一直面临选择具有范围的确切组件的问题。正如您将在下面注意到的，我在 gridpanel 中创建了 2 个不同的函数。其中之一为 confirm 创建了 Ext.MessageBox。其他函数创建 Ext.window.Window 取决于 button 单击 MessageBox。
这里的事情是；它应该 destroy 将 component 与 cancel 和 no 按钮相关联。由于 var me = this 状态，两个按钮总是指向 gridpanel 并破坏 gridpanel 本身。
如何将 destroy 方法直接指向相关的 component？
Ext.define('MyApp.FooGrid', {
extend: 'Ext.grid.Panel',
reference: 'fooGrid',
getGridMenu: function () {
// Here is the 'Update' function; with right-click user being able to see `contextmenu`
var me = this;
var ret = [
{
text: 'Update',
listeners: {
click: me.onUpdate,
scope: me
}
}
];
return me.callParent().concat(ret);
},
onUpdate: function () {
var me = this,
gridRec = this.getSelectionModel().getSelection(); // Here being able to retrieve row data.
Ext.MessageBox.confirm(translations.confirm, translations.confirmChange, me.change, me);
return gridRec;
},
change: function (button) {
var me = this;
var selectedRec = me.onUpdate();
var selectedRecEmail = selectedRec[0].data.email; //Retrieves selected record's email with right-click action
if (button === "yes") {
return new Ext.window.Window({
alias: 'updateWin',
autoShow: true,
title: translations.update,
modal: true,
width: 350,
height: 200,
items: [
{
xtype: 'container',
height: 10
},
{
xtype: 'textfield',
width: 300,
readOnly: true,
value: selectedRecEmail //Display selected record email
},
{
xtype: 'textfield',
width: 300,
fieldLabel: translations.newPassword
}
],
dockedItems: [
{
xtype: 'toolbar',
dock: 'bottom',
items: [
{
xtype: 'tbfill'
},
{
xtype: 'button',
text: translations.cancel,
listeners: {
click: function () {
me.destroy(); // Here is the bug: When user clicks on this button; should destroy current window but it destroys 'gridpanel' itself
}
}
},
{
xtype: 'button',
text: translations.save,
listeners: {
click: function () {
console.log("I'll save you!");
}
}
}
]
}
]
});
} else {
console.log('this is no!');
me.destroy(); // Another bug raises through here: If user will click on No then 'messagebox' should destroy. This one is destroys the gridpanel as well.
}
}
});
How can I point destroy method directly to related component?
首先在确认框按钮的(No)点击，你不需要破坏它会在你点击进入No时自动隐藏框。
对于更新 window 而不是使用 me.destroy() 你需要直接使用 button.up('window').destroy() 所以它只会破坏你的更新 window 而不是 grid .
而且你不需要在 change 函数中再次调用 me.onUpdate() 否则它会再次显示确认框。您可以像这样 me.getSelection().
change 函数上获取选定的记录
在这个 Fiddle 中，我使用您的代码创建了一个演示，我已经努力得到结果。
代码片段
Ext.application({
name: 'Fiddle',
launch: function () {
Ext.create('Ext.data.Store', {
storeId: 'demostore',
fields: ['name', 'email', 'phone'],
data: [{
name: 'Lisa',
email: 'lisa@simpsons.com',
phone: '555-111-1224'
}, {
name: 'Bart',
email: 'bart@simpsons.com',
phone: '555-222-1234'
}, {
name: 'Homer',
email: 'homer@simpsons.com',
phone: '555-222-1244'
}, {
name: 'Marge',
email: 'marge@simpsons.com',
phone: '555-222-1254'
}]
});
Ext.create('Ext.grid.Panel', {
title: 'Demo GRID',
store: 'demostore',
columns: [{
text: 'Name',
dataIndex: 'name'
}, {
text: 'Email',
dataIndex: 'email',
flex: 1
}, {
text: 'Phone',
dataIndex: 'phone'
}],
height: 200,
listeners: {
itemcontextmenu: function (grid, record, item, index, e, eOpts) {
e.stopEvent();
grid.up('grid').getGridMenu().showAt(e.getXY());
}
},
renderTo: Ext.getBody(),
getGridMenu: function () {
var me = this;
if (!me.contextMenu) {
me.contextMenu = Ext.create('Ext.menu.Menu', {
width: 200,
items: [{
text: 'Update',
handler: me.onUpdate,
scope: me
}]
});
}
return me.contextMenu;
},
onUpdate: function () {
var me = this;
Ext.MessageBox.confirm('Confirmation ', 'Are your sure ?', me.change, me);
},
change: function (button) {
var me = this,
selectedRecEmail = me.getSelection()[0].data.email; //Retrieves selected record's email with right-click action
if (button === "yes") {
return new Ext.window.Window({
autoShow: true,
title: 'Update',
modal: true,
width: 350,
height: 200,
items: [{
xtype: 'tbspacer',
height: 10
}, {
xtype: 'textfield',
width: 300,
readOnly: true,
value: selectedRecEmail //Display selected record email
}, {
xtype: 'textfield',
inputType:'password',
width: 300,
fieldLabel: 'New Password'
}],
dockedItems: [{
xtype: 'toolbar',
dock: 'bottom',
items: [{
xtype: 'tbfill'
}, {
xtype: 'button',
text: 'cancel',
listeners: {
click: function (btn) {
btn.up('window').destroy(); // Here is the bug: When user clicks on this button; should destroy current window but it destroys 'gridpanel' itself
}
}
}, {
xtype: 'button',
text: 'save',
listeners: {
click: function () {
console.log("I'll save you!");
}
}
}]
}]
});
}
}
});
}
});