Ext开发的行拖动效果

var app = {};Ext.onReady(function(){Ext.QuickTips.init();Ext.Msg.minWidth =300;var myData = [ {id:1,'projectId': 100, 'project': 'Ext Forms: Field Anchoring', 'taskId': 112, 'description': 'Integrate 2.0 Forms with 2.0 Layouts', 'estimate': 6, 'rate': 150, 'due':'06/24/2007'}, {id:2,'projectId': 100, 'project': 'Ext Forms: Field Anchoring', 'taskId': 113, 'description': 'Implement AnchorLayout', 'estimate': 4, 'rate': 150, 'due':'06/25/2007'}, {id:3,projectId: 100, project: 'Ext Forms: Field Anchoring', taskId: 114, description: 'Add support for multiple types of anchors', estimate: 4, rate: 150, due:'06/27/2007'}, {id:4,projectId: 100, project: 'Ext Forms: Field Anchoring', taskId: 115, description: 'Testing and debugging', estimate: 8, rate: 0, due:'06/29/2007'}, {id:5,projectId: 101, project: 'Ext Grid: Single-level Grouping', taskId: 101, description: 'Add required rendering "hooks" to GridView', estimate: 6, rate: 100, due:'07/01/2007'}, {id:6,projectId: 101, project: 'Ext Grid: Single-level Grouping', taskId: 102, description: 'Extend GridView and override rendering functions', estimate: 6, rate: 100, due:'07/03/2007'}, {id:7,projectId: 101, project: 'Ext Grid: Single-level Grouping', taskId: 103, description: 'Extend Store with grouping functionality', estimate: 4, rate: 100, due:'07/04/2007'}, {id:8,projectId: 101, project: 'Ext Grid: Single-level Grouping', taskId: 121, description: 'Default CSS Styling', estimate: 2, rate: 100, due:'07/05/2007'}, {id:9,projectId: 101, project: 'Ext Grid: Single-level Grouping', taskId: 104, description: 'Testing and debugging', estimate: 6, rate: 100, due:'07/06/2007'}, {id:10,projectId: 102, project: 'Ext Grid: Summary Rows', taskId: 105, description: 'Ext Grid plugin integration', estimate: 4, rate: 125, due:'07/01/2007'}, {id:11,projectId: 102, project: 'Ext Grid: Summary Rows', taskId: 106, description: 'Summary creation during rendering phase', estimate: 4, rate: 125, due:'07/02/2007'}, {id:12,projectId: 102, project: 'Ext Grid: Summary Rows', taskId: 107, description: 'Dynamic summary updates in editor grids', estimate: 6, rate: 125, due:'07/05/2007'}, {id:13,projectId: 102, project: 'Ext Grid: Summary Rows', taskId: 108, description: 'Remote summary integration', estimate: 4, rate: 125, due:'07/05/2007'}, {id:14,projectId: 102, project: 'Ext Grid: Summary Rows', taskId: 109, description: 'Summary renderers and calculators', estimate: 4, rate: 125, due:'07/06/2007'}, {id:15,projectId: 102, project: 'Ext Grid: Summary Rows', taskId: 110, description: 'Integrate summaries with GroupingView', estimate: 10, rate: 125, due:'07/11/2007'}, {id:16,projectId: 102, project: 'Ext Grid: Summary Rows', taskId: 111, description: 'Testing and debugging', estimate: 8, rate: 125, due:'07/15/2007'}];var store = new Ext.data.Store({reader : new Ext.data.JsonReader({fields : [{name :'id', type:'int'},{name: 'projectId', type: 'int'}, {name: 'project', type: 'string'}, {name: 'taskId', type: 'int'}, {name: 'description', type: 'string'}, {name: 'estimate', type: 'float'}, {name: 'rate', type: 'float'}, {name: 'cost', type: 'float'}, {name: 'due', type: 'date', dateFormat:'m/d/Y'} ]}),listeners :{scope : this,load : function(){if(grid){grid.getSelectionModel().selectFirstRow();}}}});store.loadData(myData);var grid = new Ext.grid.GridPanel({height : 350,width : 800,enableDragDrop : true,store : store,title : '行拖动',frame : true,enableDrag : true,columns: [{header : 'id',dataIndex : 'id'},{ id: 'description', header: 'Task', sortable: true, dataIndex: 'description' },{ header: 'Project', sortable: true, dataIndex: 'project' },{ header: 'Due Date', sortable: true, dataIndex: 'due', renderer: Ext.util.Format.dateRenderer('m/d/Y') },{ header: 'Estimate', sortable: true, dataIndex: 'estimate', renderer : function(v){ return v +' hours'; } },{ header: 'Rate', sortable: true, renderer: Ext.util.Format.usMoney, dataIndex: 'rate' },{ id: 'cost', header: 'Cost', sortable: false, groupable: false, renderer: function(v, params, record){ return Ext.util.Format.usMoney(record.data.estimate * record.data.rate); }, dataIndex: 'cost', Renderer: Ext.util.Format.usMoney } ], stripeRows : true, tbar : [{ text : '上移', scope : this, handler : function(){ buttonMove(-1); } },{ text : '下移', scope : this, handler : function(){ buttonMove(1); } },'-']});function buttonMove(toward){var sm = grid.getSelectionModel();var data = sm.getSelections();if(sm.hasSelection()){var rec = sm.getSelected();var ds = grid.getStore();var rowIndex = ds.indexOfId(rec.id) +　toward;var ri=[];for(var i=1;i<data.length;i++){var index = ds.indexOfId(data[i].id);ri.push(index);}if(toward==1){ri.sort(function(x,y){if(parseInt(x)>parseInt(y))return 1;elsereturn -1;})}else{ri.sort(function(x,y){if(parseInt(x)>parseInt(y))return -1;elsereturn 1;})}for(var i=0;i<ri.length;++i){if(rowIndex == ri[i])rowIndex += toward;}if(rowIndex < 0){Ext.Msg.alert('提示','记录已在顶部！');}elseif(rowIndex >= ds.getCount()){Ext.Msg.alert('提示','记录已在底部！');}else{move(rowIndex,data);}}else{Ext.Msg.alert('提示','请选择记录！');}}function move(rindex,data){var ds = grid.getStore();var rdata = ds.getAt(rindex);var toward = 0;var index = ds.indexOfId(data[0].id);if(rindex > index)toward = 1;for(var i=0;i<data.length;i++){ds.remove(ds.getById(data[i].id));}rindex = ds.indexOfId(rdata.id) + toward;for(var i=0;i<data.length;i++){ds.insert(rindex,data[i]);rindex++;}var sm = grid.getSelectionModel();if(sm)sm.selectRecords(data);}var mainPanel = new Ext.Panel({renderTo : 'panel1',layout : 'fit',items : [grid]});});

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