110 lines
3.8 KiB
JavaScript
110 lines
3.8 KiB
JavaScript
//>>built
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define("dojox/grid/enhanced/plugins/_SelectionPreserver", [
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"dojo/_base/declare",
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"dojo/_base/lang",
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"dojo/_base/connect",
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'../../_SelectionPreserver'
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], function(declare, lang, connect, _SelectionPreserver){
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return declare("dojox.grid.enhanced.plugins._SelectionPreserver", _SelectionPreserver, {
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// summary:
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// Preserve selections across various user actions.
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//
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// description:
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// Extends dojox.grid._SelectionPreserver adding a bit more support to make selection persistence working well
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// with various EnhancedGrid features, e.g. filtering, nested sorting, pagination, select all etc.
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//
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// Precondition - Identifier(id) is required for store, as id is used for differentiating row items.
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// Known issue - The preserved selections might be inaccurate if some unloaded rows are previously selected by range(e.g.SHIFT + click)
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//
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// example:
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// | //To turn on this - set 'keepSelection' attribute to true
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// | <div dojoType="dojox.grid.EnhancedGrid" keepSelection = true .../>
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constructor: function(selection){
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var grid = this.grid;
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grid.onSelectedById = this.onSelectedById;
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this._oldClearData = grid._clearData;
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var self = this;
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grid._clearData = function(){
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self._updateMapping(!grid._noInternalMapping);
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self._trustSelection = [];
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self._oldClearData.apply(grid, arguments);
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};
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this._connects.push(
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connect.connect(selection, 'selectRange', lang.hitch(this, '_updateMapping', true, true, false)),
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connect.connect(selection, 'deselectRange', lang.hitch(this, '_updateMapping', true, false, false)),
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connect.connect(selection, 'deselectAll', lang.hitch(this, '_updateMapping', true, false, true))
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);
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},
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destroy: function(){
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this.inherited(arguments);
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this.grid._clearData = this._oldClearData;
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},
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reset: function(){
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this.inherited(arguments);
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this._idMap = [];
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this._trustSelection = [];
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this._defaultSelected = false;
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},
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_reSelectById: function(item, index){
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// summary:
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// Overwritten
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var s = this.selection, g = this.grid;
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if(item && g._hasIdentity){
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var id = g.store.getIdentity(item);
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if(this._selectedById[id] === undefined){
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if(!this._trustSelection[index]){
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s.selected[index] = this._defaultSelected;
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}
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}else{
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s.selected[index] = this._selectedById[id];
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}
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this._idMap.push(id);
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g.onSelectedById(id, index, s.selected[index]);
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}
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},
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_selectById: function(toSelect, inItemOrIndex){
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// summary:
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// Overwritten
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if(!this.inherited(arguments)){
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this._trustSelection[inItemOrIndex] = true;
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}
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},
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onSelectedById: function(id, rowIndex, value){},
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_updateMapping: function(trustSelection, isSelect, isForAll, from, to){
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// summary:
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// This function try to keep the selection info updated when range selection is performed.
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// 1. Calculate how many unloaded rows are there;
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// 2. update _selectedById data if grid.selection._selected can be trusted, so loaded but unselected rows can
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// be properly recorded.
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var s = this.selection, g = this.grid, flag = 0, unloaded = 0, i, id;
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for(i = g.rowCount - 1; i >= 0; --i){
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if(!g._by_idx[i]){
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++unloaded;
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flag += s.selected[i] ? 1 : -1;
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}else{
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id = g._by_idx[i].idty;
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if(id && (trustSelection || this._selectedById[id] === undefined)){
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this._selectedById[id] = !!s.selected[i];
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}
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}
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}
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if(unloaded){
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this._defaultSelected = flag > 0;
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}
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if(!isForAll && from !== undefined && to !== undefined){
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isForAll = !g.usingPagination && Math.abs(to - from + 1) === g.rowCount;
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}
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// When deselectAll, make sure every thing is deselected, even if it was selected but not loaded now.
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// This occurs only when pagination's "All" is used.
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if(isForAll && (!g.usingPagination || g.selectionMode === 'single')){
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for(i = this._idMap.length - 1; i >= 0; --i){
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this._selectedById[this._idMap[i]] = isSelect;
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}
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}
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}
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});
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});
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