Java tutorial
/** Exhibit A - UIRF Open-source Based Public Software License. * * The contents of this file are subject to the UIRF Open-source Based * Public Software License(the "License"); you may not use this file except * in compliance with the License. You may obtain a copy of the License at * openelis.uhl.uiowa.edu * * Software distributed under the License is distributed on an "AS IS" * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the * License for the specific language governing rights and limitations * under the License. * * The Original Code is OpenELIS code. * * The Initial Developer of the Original Code is The University of Iowa. * Portions created by The University of Iowa are Copyright 2006-2008. All * Rights Reserved. * * Contributor(s): ______________________________________. * * Alternatively, the contents of this file marked * "Separately-Licensed" may be used under the terms of a UIRF Software * license ("UIRF Software License"), in which case the provisions of a * UIRF Software License are applicable instead of those above. */ package org.openelis.ui.widget.table; import java.util.ArrayList; import java.util.Iterator; import org.openelis.ui.common.data.QueryData; import org.openelis.ui.resources.CheckboxCSS; import org.openelis.ui.resources.UIResources; import org.openelis.ui.widget.Check; import org.openelis.ui.widget.CheckBox; import com.google.gwt.core.client.Scheduler; import com.google.gwt.dom.client.NativeEvent; import com.google.gwt.dom.client.Style.Unit; import com.google.gwt.dom.client.TableCellElement; import com.google.gwt.event.dom.client.BlurEvent; import com.google.gwt.event.dom.client.BlurHandler; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.KeyCodes; import com.google.gwt.event.shared.GwtEvent; import com.google.gwt.safehtml.shared.SafeHtml; import com.google.gwt.safehtml.shared.SafeHtmlBuilder; import com.google.gwt.user.client.DOM; import com.google.gwt.user.client.Event; import com.google.gwt.user.client.ui.AbsolutePanel; import com.google.gwt.user.client.ui.HTMLTable; import com.google.gwt.user.client.ui.HasAlignment; import com.google.gwt.user.client.ui.HasHorizontalAlignment; import com.google.gwt.user.client.ui.HasWidgets; import com.google.gwt.user.client.ui.IsWidget; import com.google.gwt.user.client.ui.Widget; /** * This class is used by Table to edit and render columns that use CheckBox * @author tschmidt * */ public class CheckBoxCell implements CellEditor, CellRenderer, IsWidget, HasWidgets.ForIsWidget { /** * Widget used to edit the cell */ private CheckBox editor; private boolean query; private ColumnInt column; private String align = "center"; protected CheckboxCSS css; public CheckBoxCell() { setEditor(new CheckBox()); } /** * Constructor that takes the editor to be used for the cell. * * @param editor */ public CheckBoxCell(CheckBox editor) { setEditor(editor); } public void setEditor(CheckBox editor) { this.editor = editor; css = UIResources.INSTANCE.checkbox(); css.ensureInjected(); editor.setEnabled(true); //editor.addBlurHandler(new BlurHandler() { // public void onBlur(BlurEvent event) { // column.finishEditing(); // } // }); } public Object finishEditing() { if (query) { return editor.getQuery(); } return editor.getValue(); } public ArrayList<Exception> validate(Object value) { if (query) { return editor.getValidateExceptions(); } return editor.getValidateExceptions(); } /** * Returns the current widget set as this cells editor. */ @SuppressWarnings("rawtypes") public void startEditing(Object value, final Container container, NativeEvent event) { query = false; editor.setQueryMode(false); editor.setValue((String) value); if (Event.getTypeInt(event.getType()) == Event.ONCLICK) { ClickEvent.fireNativeEvent(event, editor.getCheck()); column.finishEditing(); } container.setEditor(editor); if (container.getElement().getParentElement() != null) { container.getElement().getParentElement().setAttribute("align", align); } editor.setFocus(true); } @SuppressWarnings("rawtypes") public void startEditingQuery(QueryData qd, Container container, NativeEvent event) { query = true; editor.setQueryMode(true); editor.setQuery(qd); if (Event.getTypeInt(event.getType()) == Event.ONCLICK) { ClickEvent.fireNativeEvent(event, editor.getCheck()); Scheduler.get().scheduleDeferred(new Scheduler.ScheduledCommand() { @Override public void execute() { column.finishEditing(); } }); } else { container.setEditor(editor); DOM.setStyleAttribute(container.getElement(), "align", align); } } /** * Gets Formatted value from editor and sets it as the cells display */ public void render(HTMLTable table, int row, int col, Object value) { query = false; editor.setQueryMode(false); if (editor.getMode() == Check.Mode.TWO_STATE && value == null) value = "N"; render((String) value, table, row, col); } public String display(Object value) { return null; } /** * Sets the QueryData to the editor and sets the Query string into the cell * text */ public void renderQuery(HTMLTable table, int row, int col, QueryData qd) { String value; query = true; editor.setQueryMode(true); if (qd == null) value = null; else value = qd.getQuery(); editor.setValue(value); render(value, table, row, col); } public boolean ignoreKey(int keyCode) { switch (keyCode) { case KeyCodes.KEY_ENTER: return true; default: return false; } } public Widget getWidget() { return editor; } @Override public void setColumn(ColumnInt col) { this.column = col; } private void render(String value, HTMLTable table, int row, int col) { table.setWidget(row, col, getCheckDiv(value)); if (align.equalsIgnoreCase("left")) table.getCellFormatter().setHorizontalAlignment(row, col, HasHorizontalAlignment.ALIGN_LEFT); else if (align.equalsIgnoreCase("right")) table.getCellFormatter().setHorizontalAlignment(row, col, HasHorizontalAlignment.ALIGN_RIGHT); else table.getCellFormatter().setHorizontalAlignment(row, col, HasHorizontalAlignment.ALIGN_CENTER); } public SafeHtml bulkRender(Object value) { SafeHtmlBuilder builder = new SafeHtmlBuilder(); String algn; if (align.equalsIgnoreCase("left")) algn = HasHorizontalAlignment.ALIGN_LEFT.getTextAlignString(); else if (align.equalsIgnoreCase("right")) algn = HasHorizontalAlignment.ALIGN_RIGHT.getTextAlignString(); else algn = HasHorizontalAlignment.ALIGN_CENTER.getTextAlignString(); builder.appendHtmlConstant("<span align='" + algn + "'>"); builder.appendHtmlConstant(getCheckDiv((String) value).getElement().getString()); builder.appendHtmlConstant("</span>"); return builder.toSafeHtml(); } private AbsolutePanel getCheckDiv(String value) { String style; AbsolutePanel div; if (value == null) style = css.Unknown(); else if ("Y".equals(value)) style = css.Checked(); else style = css.Unchecked(); div = new AbsolutePanel(); div.setStyleName(style); return div; } public void setCss(CheckboxCSS css) { this.css = css; css.ensureInjected(); } public void setAlign(String align) { this.align = align; } @Override public void add(Widget w) { // TODO Auto-generated method stub } @Override public void clear() { // TODO Auto-generated method stub } @Override public Iterator<Widget> iterator() { // TODO Auto-generated method stub return null; } @Override public boolean remove(Widget w) { // TODO Auto-generated method stub return false; } @Override public void add(IsWidget w) { assert w instanceof CheckBox; setEditor((CheckBox) w); } @Override public boolean remove(IsWidget w) { // TODO Auto-generated method stub return false; } @Override public Widget asWidget() { // TODO Auto-generated method stub return null; } }