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<pre class="prettyprint lang-js">/*!
* Ext JS Library 3.3.0
* Copyright(c) 2006-2010 Ext JS, Inc.
* licensing@extjs.com
* http://www.extjs.com/license
*/
Ext.ns('Ext.ux.grid');
/**
* @class Ext.ux.grid.BufferView
* @extends Ext.grid.GridView
* A custom GridView which renders rows on an as-needed basis.
*/
Ext.ux.grid.BufferView = Ext.extend(Ext.grid.GridView, {
<div id="cfg-Ext.ux.grid.BufferView-rowHeight"></div>/**
* @cfg {Number} rowHeight
* The height of a row in the grid.
*/
rowHeight: 19,
<div id="cfg-Ext.ux.grid.BufferView-borderHeight"></div>/**
* @cfg {Number} borderHeight
* The combined height of border-top and border-bottom of a row.
*/
borderHeight: 2,
<div id="cfg-Ext.ux.grid.BufferView-scrollDelay"></div>/**
* @cfg {Boolean/Number} scrollDelay
* The number of milliseconds before rendering rows out of the visible
* viewing area. Defaults to 100. Rows will render immediately with a config
* of false.
*/
scrollDelay: 100,
<div id="cfg-Ext.ux.grid.BufferView-cacheSize"></div>/**
* @cfg {Number} cacheSize
* The number of rows to look forward and backwards from the currently viewable
* area. The cache applies only to rows that have been rendered already.
*/
cacheSize: 20,
<div id="cfg-Ext.ux.grid.BufferView-cleanDelay"></div>/**
* @cfg {Number} cleanDelay
* The number of milliseconds to buffer cleaning of extra rows not in the
* cache.
*/
cleanDelay: 500,
initTemplates : function(){
Ext.ux.grid.BufferView.superclass.initTemplates.call(this);
var ts = this.templates;
// empty div to act as a place holder for a row
ts.rowHolder = new Ext.Template(
'<div class="x-grid3-row {alt}" style="{tstyle}"></div>'
);
ts.rowHolder.disableFormats = true;
ts.rowHolder.compile();
ts.rowBody = new Ext.Template(
'<table class="x-grid3-row-table" border="0" cellspacing="0" cellpadding="0" style="{tstyle}">',
'<tbody><tr>{cells}</tr>',
(this.enableRowBody ? '<tr class="x-grid3-row-body-tr" style="{bodyStyle}"><td colspan="{cols}" class="x-grid3-body-cell" tabIndex="0" hidefocus="on"><div class="x-grid3-row-body">{body}</div></td></tr>' : ''),
'</tbody></table>'
);
ts.rowBody.disableFormats = true;
ts.rowBody.compile();
},
getStyleRowHeight : function(){
return Ext.isBorderBox ? (this.rowHeight + this.borderHeight) : this.rowHeight;
},
getCalculatedRowHeight : function(){
return this.rowHeight + this.borderHeight;
},
getVisibleRowCount : function(){
var rh = this.getCalculatedRowHeight(),
visibleHeight = this.scroller.dom.clientHeight;
return (visibleHeight < 1) ? 0 : Math.ceil(visibleHeight / rh);
},
getVisibleRows: function(){
var count = this.getVisibleRowCount(),
sc = this.scroller.dom.scrollTop,
start = (sc === 0 ? 0 : Math.floor(sc/this.getCalculatedRowHeight())-1);
return {
first: Math.max(start, 0),
last: Math.min(start + count + 2, this.ds.getCount()-1)
};
},
doRender : function(cs, rs, ds, startRow, colCount, stripe, onlyBody){
var ts = this.templates,
ct = ts.cell,
rt = ts.row,
rb = ts.rowBody,
last = colCount-1,
rh = this.getStyleRowHeight(),
vr = this.getVisibleRows(),
tstyle = 'width:'+this.getTotalWidth()+';height:'+rh+'px;',
// buffers
buf = [],
cb,
c,
p = {},
rp = {tstyle: tstyle},
r;
for (var j = 0, len = rs.length; j < len; j++) {
r = rs[j]; cb = [];
var rowIndex = (j+startRow),
visible = rowIndex >= vr.first && rowIndex <= vr.last;
if (visible) {
for (var i = 0; i < colCount; i++) {
c = cs[i];
p.id = c.id;
p.css = i === 0 ? 'x-grid3-cell-first ' : (i == last ? 'x-grid3-cell-last ' : '');
p.attr = p.cellAttr = "";
p.value = c.renderer(r.data[c.name], p, r, rowIndex, i, ds);
p.style = c.style;
if (p.value === undefined || p.value === "") {
p.value = " ";
}
if (r.dirty && typeof r.modified[c.name] !== 'undefined') {
p.css += ' x-grid3-dirty-cell';
}
cb[cb.length] = ct.apply(p);
}
}
var alt = [];
if(stripe && ((rowIndex+1) % 2 === 0)){
alt[0] = "x-grid3-row-alt";
}
if(r.dirty){
alt[1] = " x-grid3-dirty-row";
}
rp.cols = colCount;
if(this.getRowClass){
alt[2] = this.getRowClass(r, rowIndex, rp, ds);
}
rp.alt = alt.join(" ");
rp.cells = cb.join("");
buf[buf.length] = !visible ? ts.rowHolder.apply(rp) : (onlyBody ? rb.apply(rp) : rt.apply(rp));
}
return buf.join("");
},
isRowRendered: function(index){
var row = this.getRow(index);
return row && row.childNodes.length > 0;
},
syncScroll: function(){
Ext.ux.grid.BufferView.superclass.syncScroll.apply(this, arguments);
this.update();
},
// a (optionally) buffered method to update contents of gridview
update: function(){
if (this.scrollDelay) {
if (!this.renderTask) {
this.renderTask = new Ext.util.DelayedTask(this.doUpdate, this);
}
this.renderTask.delay(this.scrollDelay);
}else{
this.doUpdate();
}
},
onRemove : function(ds, record, index, isUpdate){
Ext.ux.grid.BufferView.superclass.onRemove.apply(this, arguments);
if(isUpdate !== true){
this.update();
}
},
doUpdate: function(){
if (this.getVisibleRowCount() > 0) {
var g = this.grid,
cm = g.colModel,
ds = g.store,
cs = this.getColumnData(),
vr = this.getVisibleRows(),
row;
for (var i = vr.first; i <= vr.last; i++) {
// if row is NOT rendered and is visible, render it
if(!this.isRowRendered(i) && (row = this.getRow(i))){
var html = this.doRender(cs, [ds.getAt(i)], ds, i, cm.getColumnCount(), g.stripeRows, true);
row.innerHTML = html;
}
}
this.clean();
}
},
// a buffered method to clean rows
clean : function(){
if(!this.cleanTask){
this.cleanTask = new Ext.util.DelayedTask(this.doClean, this);
}
this.cleanTask.delay(this.cleanDelay);
},
doClean: function(){
if (this.getVisibleRowCount() > 0) {
var vr = this.getVisibleRows();
vr.first -= this.cacheSize;
vr.last += this.cacheSize;
var i = 0, rows = this.getRows();
// if first is less than 0, all rows have been rendered
// so lets clean the end...
if(vr.first <= 0){
i = vr.last + 1;
}
for(var len = this.ds.getCount(); i < len; i++){
// if current row is outside of first and last and
// has content, update the innerHTML to nothing
if ((i < vr.first || i > vr.last) && rows[i].innerHTML) {
rows[i].innerHTML = '';
}
}
}
},
removeTask: function(name){
var task = this[name];
if(task && task.cancel){
task.cancel();
this[name] = null;
}
},
destroy : function(){
this.removeTask('cleanTask');
this.removeTask('renderTask');
Ext.ux.grid.BufferView.superclass.destroy.call(this);
},
layout: function(){
Ext.ux.grid.BufferView.superclass.layout.call(this);
this.update();
}
});// We are adding these custom layouts to a namespace that does not
// exist by default in Ext, so we have to add the namespace first:
Ext.ns('Ext.ux.layout');
<div id="cls-Ext.ux.layout.CenterLayout"></div>/**
* @class Ext.ux.layout.CenterLayout
* @extends Ext.layout.FitLayout
* <p>This is a very simple layout style used to center contents within a container. This layout works within
* nested containers and can also be used as expected as a Viewport layout
extjs3源文件下载
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extjs3源文件下载 （4616个子文件） 
ext-all.css 135KB ext-all.css 132KB ext-all.css 132KB ext-all.css 132KB ext-all.css 132KB ext-all-notheme.css 97KB xtheme-access.css 40KB xtheme-blue.css 38KB yourtheme.css 37KB xtheme-gray.css 37KB xtheme-gray.css 37KB xtheme-gray.css 37KB silk.css 17KB calendar.css 17KB ux-all.css 17KB desktop.css 13KB grid.css 11KB form.css 11KB extjs.css 8KB button.css 8KB panel.css 7KB tabs.css 7KB grid.css 6KB style.css 6KB style.css 6KB grid.css 6KB docs.css 6KB docs.css 6KB grid.css 6KB panel-reset.css 6KB GroupTab.css 6KB core.css 5KB toolbar.css 5KB feed-viewer.css 5KB feed-viewer.css 5KB layout.css 5KB date-picker.css 5KB tree.css 4KB feed-viewer-access.css 4KB menu.css 4KB tree.css 4KB form.css 4KB window.css 3KB tree.css 3KB tree.css 3KB button.css 3KB print.css 3KB print.css 3KB toolbar.css 3KB tasks.css 3KB tabs.css 3KB date-picker.css 3KB editor.css 3KB tabs.css 3KB resizable.css 3KB date-picker.css 3KB date-picker.css 3KB statusbar.css 3KB form.css 3KB tabs.css 3KB forum.css 3KB toolbar.css 3KB toolbar.css 3KB qtips.css 3KB form.css 2KB layout-browser.css 2KB button.css 2KB button.css 2KB restful.css 2KB img-org.css 2KB panel.css 2KB panel.css 2KB slider.css 2KB panel.css 2KB window.css 2KB menu.css 2KB chooser.css 2KB window.css 2KB window.css 2KB core.css 2KB resizable.css 2KB resizable.css 2KB core.css 2KB resizable.css 2KB menu.css 2KB list-view.css 1KB core.css 1KB RowEditor.css 1KB box.css 1KB box.css 1KB box.css 1KB box.css 1KB menu.css 1KB examples.css 1KB organizer.css 1KB Spinner.css 1KB toolbars.css 1KB bubble.css 1KB ColumnNodeUI.css 1KB layout.css 1KB共 4616 条
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资源评论
龙哥搞java2012-12-04还好吧，和我想要的有区别，不过应该能用！
