Java tutorial
/* * Sencha GXT 2.3.1 - Sencha for GWT * Copyright(c) 2007-2013, Sencha, Inc. * licensing@sencha.com * * http://www.sencha.com/products/gxt/license/ */ package com.extjs.gxt.ui.client.widget.grid; import java.util.ArrayList; import java.util.List; import java.util.Map; import com.extjs.gxt.ui.client.Style.HorizontalAlignment; import com.extjs.gxt.ui.client.core.El; import com.extjs.gxt.ui.client.core.FastMap; import com.extjs.gxt.ui.client.data.ModelData; import com.extjs.gxt.ui.client.store.ListStore; import com.extjs.gxt.ui.client.widget.BoxComponent; import com.extjs.gxt.ui.client.widget.ComponentHelper; import com.google.gwt.i18n.client.NumberFormat; import com.google.gwt.user.client.DOM; import com.google.gwt.user.client.Element; import com.google.gwt.user.client.Event; import com.google.gwt.user.client.ui.FlexTable; import com.google.gwt.user.client.ui.HTML; import com.google.gwt.user.client.ui.HasHorizontalAlignment; import com.google.gwt.user.client.ui.SimplePanel; import com.google.gwt.user.client.ui.Widget; /** * Column footer widget for Grid, which renders one to many aggregation rows. */ public class ColumnFooter extends BoxComponent { public class Foot extends SimplePanel { public Foot(AggregationRowConfig<?> config, String id) { setStyleName("x-grid3-cell-inner"); } public void setHtml(String html) { setWidget(new HTML(html)); } public void setWidget(Widget widget) { super.setWidget(widget); } } public class FooterRow extends BoxComponent { protected FlexTable table; protected AggregationRowConfig<?> config; public FooterRow(AggregationRowConfig<?> config) { this.config = config; rows.add(this); } public void setHtml(int column, String html) { Foot f = (Foot) table.getWidget(0, column); f.setHtml(html); } public void setWidget(int column, Widget widget) { Foot f = (Foot) table.getWidget(0, column); f.setWidget(widget); } @Override protected void doAttachChildren() { super.doAttachChildren(); ComponentHelper.doAttach(table); } @Override protected void doDetachChildren() { super.doDetachChildren(); ComponentHelper.doDetach(table); } @Override protected void onRender(Element target, int index) { super.onRender(target, index); setElement(DOM.createDiv(), target, index); setStyleName("x-grid3-footer-row"); table = new FlexTable(); table.setStyleName("x-grid3-row-table"); table.setCellPadding(0); table.setCellSpacing(0); int cols = cm.getColumnCount(); for (int i = 0; i < cols; i++) { Foot f = new Foot(config, cm.getDataIndex(i)); String cellStyle = config.getCellStyle(cm.getDataIndex(i)); if (cellStyle == null) { cellStyle = ""; } table.setWidget(0, i, f); table.getCellFormatter().setStyleName(0, i, "x-grid3-cell x-grid3-footer-cell x-grid3-td-" + cm.getColumnId(i) + " " + cellStyle); HorizontalAlignment align = cm.getColumnAlignment(i); if (align == HorizontalAlignment.RIGHT) { table.getCellFormatter().setHorizontalAlignment(0, i, HasHorizontalAlignment.ALIGN_RIGHT); } else if (align == HorizontalAlignment.CENTER) { table.getCellFormatter().setHorizontalAlignment(0, i, HasHorizontalAlignment.ALIGN_CENTER); } else { table.getCellFormatter().setHorizontalAlignment(0, i, HasHorizontalAlignment.ALIGN_LEFT); } if (cm.isHidden(i)) { updateColumnHidden(i, true); } } el().appendChild(table.getElement()); } } protected Grid<ModelData> grid; protected ColumnModel cm; protected List<FooterRow> rows = new ArrayList<FooterRow>(); @SuppressWarnings({ "unchecked", "rawtypes" }) public ColumnFooter(Grid grid, ColumnModel cm) { this.grid = grid; this.cm = cm; } public void add(FooterRow row) { rows.add(row); } public void remove(FooterRow row) { rows.remove(row); } public void updateColumnHidden(int column, boolean hidden) { for (int i = 0; i < rows.size(); i++) { FooterRow footerRow = rows.get(i); Element td = footerRow.table.getFlexCellFormatter().getElement(0, column); td.getStyle().setProperty("display", hidden ? "none" : ""); } } public void updateColumnWidth(int column, int width) { if (!cm.isHidden(column)) { for (int i = 0; i < rows.size(); i++) { FooterRow row = rows.get(i); El.fly(row.table.getCellFormatter().getElement(0, column)).setWidth(width, true); Widget w = row.table.getWidget(0, column); El.fly(w.getElement()).setWidth(width - 2, true); } } } public void updateTotalWidth(int offset, int width) { for (int i = 0; i < rows.size(); i++) { FooterRow row = rows.get(i); row.setWidth(offset); row.table.getElement().getStyle().setPropertyPx("width", width); } } @Override protected void onRender(Element target, int index) { super.onRender(target, index); setElement(DOM.createDiv(), target, index); setStyleName("x-grid3-footer"); setStyleAttribute("overflow", "hidden"); int rows = cm.getAggregationRows().size(); for (int i = 0; i < rows; i++) { FooterRow row = new FooterRow(cm.getAggregationRow(i)); row.render(getElement()); } refresh(); sinkEvents(Event.MOUSEEVENTS); } @Override protected void doAttachChildren() { super.doAttachChildren(); for (FooterRow row : rows) { ComponentHelper.doAttach(row); } } @Override protected void doDetachChildren() { super.doAttachChildren(); for (FooterRow row : rows) { ComponentHelper.doDetach(row); } } @SuppressWarnings({ "unchecked", "rawtypes" }) protected void refresh() { ListStore<ModelData> store = grid.getStore(); int cols = cm.getColumnCount(); int models = grid.getStore().getCount(); int rowcount = rows.size(); for (int i = 0; i < rowcount; i++) { AggregationRowConfig<?> config = cm.getAggregationRow(i); FooterRow footer = rows.get(i); for (int j = 0; j < cols; j++) { String name = cm.getDataIndex(j); updateColumnWidth(j, cm.getColumnWidth(j)); if (config.getHtml(name) != null) { footer.setHtml(j, config.getHtml(name)); continue; } else if (config.getWidget(name) != null) { footer.setWidget(j, config.getWidget(name)); continue; } Number value = null; SummaryType<?> type = config.getSummaryType(name); if (type != null) { Map<String, Object> data = new FastMap<Object>(); for (int k = 0; k < models; k++) { value = type.render(value, store.getAt(k), name, data); } } if (config.getModel() != null) { Object obj = config.getModel().get(name); if (obj != null) { if (obj instanceof Number) { value = (Number) obj; } else if (obj instanceof Widget) { footer.setWidget(j, (Widget) obj); continue; } else { footer.setHtml(j, obj.toString()); continue; } } } NumberFormat format = config.getSummaryFormat(name); if (format != null && value != null) { String svalue = format.format(value.doubleValue()); footer.setHtml(j, svalue); continue; } AggregationRenderer<?> renderer = config.getRenderer(name); if (renderer != null) { Object obj = renderer.render(value, j, (Grid) grid, (ListStore) store); if (obj instanceof Widget) { footer.setWidget(j, (Widget) obj); } else if (obj != null) { footer.setHtml(j, obj.toString()); } } } } } }