本文介绍了Sencha Ext JS 4，使用另一个面板创建可拖动面板时出现问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我试着在sencha论坛上问这个问题，但没有任何运气： http://www.sencha.com/forum/showthread.php?175816-Attempting-to-create-draggable-panel-within-another-panel-stuck-in-upper-left-corner
我正在尝试在另一个面板中添加一个小面板，并允许用户在屏幕上拖动它。
Ext.define('CS.view.StartScreen', { extend: 'Ext.panel.Panel',
alias: 'widget.startscreen',
items: [{
xtype: 'panel',
title: 'Hello',
// closable: true,
// collapsible: true,
draggable: true,
// resizable: true,
// maximizable: true,
constrain: true,
height: 300,
width: 300
}],
dockedItems: [{
xtype: 'toolbar',
dock: 'bottom',
layout: 'hbox',
pack: 'center',
items: [
{xtype: 'button', text: 'Click Me'}
]
}]
});
但是，每当我尝试拖动面板时，它都会捕捉回左上角。有人能告诉我我做错了什么吗？谢谢！
编辑%1 有问题的应用程序的完整代码：
app.js
Ext.Loader.setConfig({
enabled: true
});
Ext.application({
name: 'CS',
appFolder: 'ccms/app',
autoCreateViewport: true,
controllers: [
'TestCreator',
'Primary',
'Manager'
],
launch: function(){
}
});
TestCreator.js
Ext.define('CS.controller.TestCreator', {
extend: 'Ext.app.Controller',
views: [
'testcreator.ViewTestCreator'
],
init: function(){
console.log('testcreator init');
this.control({
});
}
});
Primary.js
Ext.define('CS.controller.Primary',{
extend: 'Ext.app.Controller',
views: [
'ViewLogin',
],
init: function(){
this.control({
'viewport': {
afterrender: function(viewport, opts){
viewport.add([{
xtype: 'viewlogin',
itemId: 'viewlogin'
}]);
}
},
'viewlogin button[text = Submit]': {
click: function(btn, e, eOpts){
var form = btn.up('form').getForm();
form.submit({
success: function(form, action){
console.log(action.result);
btn.up('viewport').remove('viewlogin');
var viewport = Ext.ComponentQuery.query('viewport');
if(viewport.length > 0)
viewport[0].add({xtype: 'dashboard'});
},
failure: function(form, action){
},
scope: this
});
}
}
});
}
});
Manager.js
Ext.define('CS.controller.Manager', {
extend: 'Ext.app.Controller',
views: [
'ViewDashboard'
],
init: function(){
this.control({
'viewport > formbuilder': {
render: function(){
console.log('render yo');
}
}
});
}
});
Viewport.js
Ext.define('CS.view.Viewport', {
extend: 'Ext.container.Viewport',
layout: 'fit'
})
ViewLogin.js
Ext.define('CS.view.ViewLogin',{
extend: 'Ext.panel.Panel',
alias: 'widget.viewlogin',
layout: {
type: 'vbox',
align: 'center',
pack: 'start'
},
items: [{
flex: 1,
border: false
},{
xtype: 'form',
url: '/index.php/auth',
baseParams: {
csrf_token: Ext.util.Cookies.get('ci_csrf'),
cs_method: 'user_login'
},
width: 300,
layout: 'anchor',
title: 'Login',
defaults: {
margin: '5 5 5 5'
},
items: [{
xtype: 'textfield',
fieldLabel: 'Username',
inputType: 'text',
name: 'username'
},{
xtype: 'textfield',
fieldLabel: 'Password',
inputType: 'password',
name: 'password'
}],
buttons: [{
text: 'Reset',
handler: function() {
console.log('button pressed');
this.up('form').getForm().reset();
}
},{
text: 'Submit'
}]
},{
flex: 2,
border: false
}]
});
ViewDashboard.js
Ext.define('CS.view.ViewDashboard', {
extend: 'Ext.panel.Panel',
alias: 'widget.dashboard',
layout: 'fit',
bodyStyle: {"background-color":"#FF6600"},
items: [{
xtype: 'testcreator'
}],
dockedItems: [{
xtype: 'toolbar',
dock: 'bottom',
layout: 'hbox',
pack: 'center',
items: [{
xtype: 'splitbutton',
text: 'Applications',
handler: function(){
console.log('splitbutton');
},
menu: new Ext.menu.Menu({
items: [
{text: 'Item 1', hander: function(){}},
{text: 'Item 2', hander: function(){}},
]
})
}]
}],
listeners: {
render: function(sender){
console.log(sender);
sender.dropZone = new Ext.dd.DropZone(sender.body, {
getTargetFromEvent: function(e) {
console.log('getTargetFromEvent');
var temp = {
x: e.getX() - this.DDMInstance.deltaX,
y: e.getY() - this.DDMInstance.deltaY
};
console.log(temp);
return temp;
},
// On entry into a target node, highlight that node.
onNodeEnter : function(target, dd, e, data){
// Ext.fly(target).addCls('my-row-highlight-class');
},
// On exit from a target node, unhighlight that node.
onNodeOut : function(target, dd, e, data){
// Ext.fly(target).removeCls('my-row-highlight-class');
},
onNodeOver : function(target, dd, e, data){
return Ext.dd.DropZone.prototype.dropAllowed;
},
onNodeDrop : function(target, dd, e, data){
console.log('onNodeDrop');
data.panel.setPosition(50, 50, true);
return true;
}
});
}
}
});
TestCreator.js
Ext.define('CS.view.testcreator.ViewTestCreator', {
extend: 'Ext.panel.Panel',
alias: 'widget.testcreator',
layout: {
type: 'hbox',
pack: 'start',
align: 'stretch'
},
draggable: true,
title: 'Form Builder',
width: 600,
height: 450,
dockedItems: [{
xtype: 'toolbar',
dock: 'top',
layout: 'hbox',
items: [{
text: 'File'
},{
text: 'Edit'
},{
text: 'Help'
}]
}],
items: [{
html: 'panel 1',
flex: 1
},{
html: 'panel 2',
flex: 2
}]
});
推荐答案
您必须为CS.view.StartScreen实现drop zone。例如，您可以将以下呈现处理程序添加到代码中：
render: function(sender) {
sender.dropZone = new Ext.dd.DropZone(sender.body, {
getTargetFromEvent: function(e) {
return {
x: e.getX() - this.DDMInstance.deltaX,
y: e.getY() - this.DDMInstance.deltaY
};
},
onNodeOver : function(target, dd, e, data){
return Ext.dd.DropZone.prototype.dropAllowed;
},
onNodeDrop : function(target, dd, e, data){
data.panel.setPosition(target.x, target.y);
return true;
}
});
}
工作示例：http://jsfiddle.net/lolo/5MXJ9/2/
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