litesoft
@ 965
litesoft / trunk / GWT_Sandbox / FormEngine / src / com / temp / foundation / client / widget / table / CachedDataTable.java
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package com.temp.foundation.client.widget.table; import com.google.gwt.dom.client.Style.*; import com.google.gwt.event.dom.client.*; import com.google.gwt.user.cellview.client.*; import com.google.gwt.user.client.ui.*; import com.google.gwt.view.client.*; import com.temp.foundation.client.widget.table.CustomDataTable.*; import com.temp.common.shared.*; import com.temp.common.shared.utils.*; import java.util.*; /** * @param <R> the row type * * @author paule * To use CachedDataTable: * <pre> * 1) instantiate: * table = new CachedDataTable<RowType>(...) * * 2) add Columns: * table.addColumn(...) * * 3) set data of type List<RowType> * table.setData(...) * * And you're done! * </pre> */ @SuppressWarnings("rawtypes") public class CachedDataTable<R extends DataRow<F>, F> extends Composite implements LoadingProgressListener { public static final String DEFAULT_HEIGHT = "350px"; public static final String DEFAULT_WIDTH = "100%"; private static class SortFieldComparatorDirection { String sortByField; Comparator comparator; SortDirection sortDirection; SortFieldComparatorDirection( String _sortByField, Comparator _comparator, SortDirection _sortDirection ) { sortByField = _sortByField; comparator = _comparator; sortDirection = _sortDirection; } String getSortByField() { return sortByField; } Comparator getComparator() { return comparator; } SortDirection getSortDirection() { return sortDirection; } void setSortDirection( SortDirection _sortDirection ) { sortDirection = _sortDirection; } } // table CustomDataTable<R, F> dataTable; Map<String, Column<R, ?>> fieldColumns = new HashMap<String, Column<R, ?>>(); Map<String, Comparator> fieldComparators = new HashMap<String, Comparator>(); // data List<R> fullDataList = new ArrayList<R>(); LinkedHashMap<String, List<R>> pageMarkerDataList = new LinkedHashMap<String, List<R>>(); Map<String, String> nextPageMarkerMap = new HashMap<String, String>(); LinkedList<SortFieldComparatorDirection> sortQueue = new LinkedList<SortFieldComparatorDirection>(); public CachedDataTable() { this( CustomDataTable.DEFAULT_RESULTS_PER_PAGE, true, null, false, null, null, null, DEFAULT_WIDTH, DEFAULT_HEIGHT ); } public CachedDataTable( String title ) { this( CustomDataTable.DEFAULT_RESULTS_PER_PAGE, true, title, true, null, null, null, DEFAULT_WIDTH, DEFAULT_HEIGHT ); } public CachedDataTable( String title, ClickHandler downloadCSVButtonClickHandler ) { this( CustomDataTable.DEFAULT_RESULTS_PER_PAGE, true, title, true, null, null, downloadCSVButtonClickHandler, DEFAULT_WIDTH, DEFAULT_HEIGHT ); } public CachedDataTable( int pageSize, boolean supportPaging, String width, String height ) { this( pageSize, supportPaging, null, false, null, null, null, width, height ); } public CachedDataTable( String title, int pageSize, boolean supportPaging, String width, String height ) { this( pageSize, supportPaging, title, true, null, null, null, width, height ); } public CachedDataTable( String title, int pageSize, boolean supportPaging, boolean includeRowNumber, String width, String height ) { this( pageSize, supportPaging, title, true, null, null, null, includeRowNumber, width, height ); } public CachedDataTable( int pageSize, boolean supportPaging, String title, boolean includeTitleBar, Widget topWidget, Widget bottomWidget, final ClickHandler downloadCSVButtonClickHandler, String width, String height ) { this( pageSize, supportPaging, title, includeTitleBar, topWidget, bottomWidget, downloadCSVButtonClickHandler, true, width, height ); } private CachedDataTable( int pageSize, boolean supportPaging, String title, boolean includeTitleBar, Widget topWidget, Widget bottomWidget, final ClickHandler downloadCSVButtonClickHandler, boolean includeRowNumber, String width, String height ) { boolean includeDownloadCSVButton = (downloadCSVButtonClickHandler != null); dataTable = new CustomDataTable<R, F>( pageSize, supportPaging, title, new DataTableUpdater() { public void updateDataTable() { String pageMarker = dataTable.getPageMarker(); List<R> dataList = new ArrayList<R>(); for ( List<R> pagedDataList : pageMarkerDataList.values() ) { dataList.addAll( pagedDataList ); } sort( dataList ); refreshData( dataList ); List<R> dataListPage = pageMarkerDataList.get( pageMarker ); String nextPageMarker = nextPageMarkerMap.get( pageMarker ); dataTable.setData( dataListPage, nextPageMarker ); } public void onDataTableDownloadCSVButtonClick( ClickEvent event ) { downloadCSVButtonClickHandler.onClick( event ); } }, topWidget, bottomWidget, includeTitleBar, includeDownloadCSVButton, includeRowNumber, width, height ); initWidget( dataTable ); } public void setTitle( String title ) { dataTable.setTitle( title ); } public void setSelectionModel( SelectionModel<R> selectionModel ) { dataTable.setSelectionModel( selectionModel ); } public SelectionModel<? super R> getSelectionModel() { return dataTable.getSelectionModel(); } @Override public void loadingReset() { dataTable.loadingReset(); } @Override public void loadingStarted() { dataTable.loadingStarted(); } @Override public void loadingCompleted( boolean successfully ) { dataTable.loadingCompleted( successfully ); } /** * Adds a column * * @param fields - the column / "field" definitions */ public <FIELD extends DataRowField> void addColumns( FIELD... fields ) { if ( fields != null ) { for ( FIELD field : fields ) { addColumn( field ); } } } /** * Adds a column * * @param field - the column or "field" definition */ public <FIELD extends DataRowField> void addColumn( FIELD field ) { if ( show( field ) ) { addComparator( dataTable.addColumn( field ), field, getComparator( field ) ); } } /** * Adds a column * * @param column - the column * @param field - the column definition "field" */ public <FIELD extends DataRowField> void addColumn( Column<R, ?> column, FIELD field ) { if ( show( field ) ) { addComparator( dataTable.addColumn( column, field ), field, getComparator( field ) ); } } /** * Adds a column * * @param field - the column or "field" definition * @param comparator - the comparator */ public <FIELD extends DataRowField> void addColumn( FIELD field, Comparator comparator ) { if ( show( field ) ) { addComparator( dataTable.addColumn( field ), field, comparator ); } } /** * Adds a column * * @param column - the column * @param field - the column definition "field" * @param comparator - the comparator */ public <FIELD extends DataRowField> void addColumn( Column<R, ?> column, FIELD field, Comparator comparator ) { if ( show( field ) ) { addComparator( dataTable.addColumn( column, field ), field, comparator ); } } private <FIELD extends DataRowField> boolean show( FIELD field ) { if ( field == null ) { return false; } return (field instanceof ColumnHidable) ? !((ColumnHidable) field).hideColumn() : true; } /** * Adds a column with a comparator. * * @param column - the column * @param columnHeader - the column header that appears at the top of the table * @param fieldName - must be unique among columns (used as key for columns for sorting) * @param comparator - the comparator */ public void addColumn( Column<R, ?> column, String columnHeader, String fieldName, Comparator comparator ) { dataTable.addColumn( column, columnHeader, fieldName ); addComparator( column, fieldName, comparator ); } /** * Adds a column * * @param column - the column * @param columnHeader - the column header to be displayed */ public void addColumn( Column<R, ?> column, String columnHeader, String fieldName ) { dataTable.addColumn( column, columnHeader, fieldName ); } public void addColumn( Column<R, ?> column, String columnHeader, String fieldName, int width, Unit widthUnit ) { dataTable.addColumn( column, columnHeader, fieldName, width, widthUnit ); } public void addColumn( Column<R, ?> column, String columnHeader, String fieldName, Comparator comparator, int width, Unit widthUnit ) { dataTable.addColumn( column, columnHeader, fieldName, width, widthUnit ); addComparator( column, fieldName, comparator ); } private <FIELD extends DataRowField> Comparator<?> getComparator( FIELD field ) { if ( field instanceof Comparator ) { return (Comparator) field; } if ( field instanceof ComparatorSource ) { return ((ComparatorSource) field).getComparator(); } return null; } private <FIELD extends DataRowField> void addComparator( Column<R, ?> column, FIELD field, Comparator comparator ) { addComparator( column, field.name(), comparator ); } private void addComparator( Column<R, ?> column, String fieldName, Comparator comparator ) { if ( comparator != null ) { fieldComparators.put( fieldName, comparator ); fieldColumns.put( fieldName, column ); } } private void addToSortQueue( String sortByField, SortDirection sortDirection ) { if ( StringUtils.isBlank( sortByField ) ) { return; } Comparator comparator = fieldComparators.get( sortByField ); if ( comparator == null ) { return; } SortFieldComparatorDirection sortParams = !sortQueue.isEmpty() ? sortQueue.getLast() : null; if ( sortParams != null && sortParams.getSortByField().equals( sortByField ) ) { sortParams.setSortDirection( sortDirection ); } else { if ( sortQueue.size() == fieldComparators.size() && !sortQueue.isEmpty() ) { // remove the head of the list; sortQueue.remove(); } sortQueue.add( new SortFieldComparatorDirection( sortByField, comparator, sortDirection ) ); } } /** * Sort the dataList * * @param dataList - the unsorted data */ @SuppressWarnings("unchecked") public void sort( List<R> dataList ) { if ( dataList == null || dataList.isEmpty() ) { return; } String sortByField = dataTable.getSortByField(); SortDirection sortDirection = dataTable.getSortDirection(); addToSortQueue( sortByField, sortDirection ); List<R> sortedDataList = new ArrayList<R>( dataList ); for ( SortFieldComparatorDirection sortParams : sortQueue ) { final Comparator comparator = sortParams.getComparator(); final Column<R, ?> column = fieldColumns.get( sortParams.getSortByField() ); //Window.alert("sort by " + sortParams.getSortByField() + ", " + sortParams.getSortDirection().name()); Collections.sort( sortedDataList, new Comparator<R>() { public int compare( R data1, R data2 ) { Object key1 = column.getValue( data1 ); Object key2 = column.getValue( data2 ); //Window.alert("" + key1 + " (" + comparator.compare(key1, key2) + ") " + key2); return comparator.compare( key1, key2 ); } } ); dataList.clear(); dataList.addAll( sortedDataList ); if ( sortParams.getSortDirection() == SortDirection.DESC ) { Collections.reverse( dataList ); } } } private void refreshData( List<R> dataList ) { int numResultsPerPage = dataTable.getResultsPerPage(); // break up the data list into page chunks pageMarkerDataList.clear(); nextPageMarkerMap.clear(); int pagedDataCounter = 0; String pageMarker = null; int pageMarkerCounter = 0; int dataCounter = 0; for ( R data : dataList ) { List<R> pagedDataList = pageMarkerDataList.get( pageMarker ); if ( pagedDataList == null ) { pagedDataList = new ArrayList<R>( numResultsPerPage ); pageMarkerDataList.put( pageMarker, pagedDataList ); } pagedDataList.add( data ); pagedDataCounter++; dataCounter++; if ( pagedDataCounter == numResultsPerPage ) { if ( dataCounter < dataList.size() ) { String nextPageMarker = "" + (++pageMarkerCounter); nextPageMarkerMap.put( pageMarker, nextPageMarker ); pageMarker = nextPageMarker; pagedDataCounter = 0; } else { nextPageMarkerMap.put( pageMarker, null ); } } } } public void setData( List<R> dataList ) { List<R> newList = (dataList != null && !dataList.isEmpty()) ? new ArrayList<R>( dataList ) : new ArrayList<R>(); clear(); fullDataList = newList; refreshData( fullDataList ); dataTable.setData( pageMarkerDataList.get( null ), nextPageMarkerMap.get( null ) ); } public List<R> getData() { return fullDataList; } public void clear() { dataTable.reset(); fullDataList.clear(); sortQueue.clear(); pageMarkerDataList.clear(); nextPageMarkerMap.clear(); } public void redraw() { dataTable.redraw(); } public void addRow( R row ) { fullDataList.add( row ); setData( fullDataList ); } } |
Commits for litesoft/trunk/GWT_Sandbox/FormEngine/src/com/temp/foundation/client/widget/table/CachedDataTable.java
Revision | Author | Commited | Message |
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965 | GeorgeS | Fri 01 Aug, 2014 03:20:35 +0000 | ! |