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2010年8月7日 #

     摘要: 之前项目有个模块要求用树形解决,附带要实现checkbox,增删修改以及copy/cut/paste等等功能; 因为之前写的人用了xloadTree,其他功能都实现了,但是客户要求要有cookie功能,实现不了麻烦啊~ 正巧现在在学习用Ext,发现Ext的tree本身就很强大基本的功能都可以实现。 Code highlighting produced by Actipro Cod...  阅读全文
posted @ 2010-08-08 23:17 Chucky 阅读(1957) | 评论 (0)编辑 收藏

Border布局作为Ext中整个框架的布局应该说很普遍,一般North放一个应用的Logo bar,West一般会作为导航栏的放置位置;
而Center(East)往往作为整个应用的核心部分,而South位置也往往放置一些应用的版权等信息。

而导航栏一般会采用的呈现方式一般无非是Treepanel或者根据模块放置多个Panel,而多数会采用的布局方式,往往是
Accordion的布局。比如像这样(偷个懒直接用设计器写的):
MyViewportUi = Ext.extend(Ext.Viewport, {
    layout: 'border',
    initComponent: 
function() {
        
this.items = [
            {
                xtype: 'panel',
                title: 'north',
                region: 'north'
            },
            {
                xtype: 'panel',
                title: 'west',
                region: 'west',
                width: 
201,
                split: 
true,
                layout: 'accordion',
                activeItem: 
0,
                items: [
                    {
                        xtype: 'panel',
                        title: 'panel1',
                        layout: 'column',
                        width: 
180,
                        items: [
                            {
                                xtype: 'button',
                                text: 'Button1',
                                scale: 'large'
                            },
                            {
                                xtype: 'button',
                                text: 'Button2',
                                scale: 'large'
                            },
                            {
                                xtype: 'button',
                                text: 'Button3',
                                scale: 'large'
                            },
                            {
                                xtype: 'button',
                                text: 'Button4',
                                scale: 'large'
                            },
                            {
                                xtype: 'button',
                                text: 'Button5',
                                scale: 'large'
                            },
                            {
                                xtype: 'button',
                                text: 'Button6',
                                scale: 'large'
                            }
                        ]
                    },
                    {
                        xtype: 'panel',
                        title: 'panel2'
                    },
                    {
                        xtype: 'panel',
                        title: 'panel3'
                    }
                ]
            },
            {
                xtype: 'panel',
                title: 'east',
                region: 'center'
            },
            {
                xtype: 'panel',
                title: 'south',
                region: 'south'
            }
        ];
        MyViewportUi.superclass.initComponent.call(
this);
    }
});
一个基本的框架就产生了,而问题也随之而来。最主要的问题是IE和FF显示不一样。应该说FF显示很正常,按键根据导航栏的大小,改变每一行显示的数量;
而IE呢,在第一次导航栏宽带变大的时候,一切正常;而当导航栏宽度缩小的时候,原来每行的按键数却并不变。想想这Ext都3.2了,不会还有这么脑残的bug吧;
google了下,国内似乎对这个问题也没有什么讨论的;于是直接去官网的论坛问。

最初别人的提议是,更改westPanel的属性
layout: {
    type: 'accordion',
    autoWidth: 
false
}
等于禁止westPanel的子栏目自动变化宽度,试了如果westPanel的子栏目只有一个工作正常,但是如果多个的话,又悲剧了~

因为每次只有1个子栏目的宽度在变化,所以产生这个问题也不足为奇了。

最后某个网友提供了一个自己写的补丁,问题解决了。
Ext.layout.AccordionPatch = Ext.extend(Ext.layout.Accordion, {
    
    inactiveItems: [],
//ADDED

    
// private
    onLayout : function(ct, target){//ADDED
        Ext.layout.AccordionPatch.superclass.onLayout.call(this, ct, target);
        
if(this.autoWidth === false) {
            
for(var i = 0; i < this.inactiveItems.length; i++) {
                
var item = this.inactiveItems[i];
                item.setSize(target.getStyleSize());
            }
        }
    },
    
// private
    beforeExpand : function(p, anim){//MODFIED
        var ai = this.activeItem;
        
if(ai){
            
if(this.sequence){
                
delete this.activeItem;
                ai.collapse({callback:
function(){
                    p.expand(anim 
|| true);
                }, scope: 
this});
                
return false;
            }
else{
                ai.collapse(
this.animate);
                
if(this.autoWidth === false && this.inactiveItems.indexOf(ai) == -1)//*****
                    this.inactiveItems.push(ai);//*****
            }
        }
        
this.activeItem = p;
        
if(this.activeOnTop){
            p.el.dom.parentNode.insertBefore(p.el.dom, p.el.dom.parentNode.firstChild);
        }
        
if(this.autoWidth === false && this.inactiveItems.indexOf(this.activeItem) != -1)//*****
            this.inactiveItems.remove(this.activeItem);//*****
        this.layout();
    }
    
});

Ext.Container.LAYOUTS['accordionpatch'] 
= Ext.layout.AccordionPatch; 
配合补丁,westPanel的属性也要有相应的变化
layout: {
    type:
'accordionpatch',
    autoWidth: false
}




posted @ 2010-08-07 13:24 Chucky 阅读(316) | 评论 (0)编辑 收藏