Java tutorial
package org.sigmah.client.ui.view.contact; /* * #%L * Sigmah * %% * Copyright (C) 2010 - 2016 URD * %% * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this program. If not, see * <http://www.gnu.org/licenses/gpl-3.0.html>. * #L% */ import com.google.gwt.event.logical.shared.ResizeEvent; import com.google.gwt.event.logical.shared.ResizeHandler; import com.google.gwt.i18n.client.DateTimeFormat; import com.google.gwt.user.client.Timer; import com.google.gwt.user.client.Window; import com.google.gwt.user.client.ui.Image; import com.extjs.gxt.ui.client.Style; import com.extjs.gxt.ui.client.event.BaseEvent; import com.extjs.gxt.ui.client.event.Events; import com.extjs.gxt.ui.client.event.Listener; import com.extjs.gxt.ui.client.store.ListStore; import com.extjs.gxt.ui.client.util.Padding; import com.extjs.gxt.ui.client.widget.LayoutContainer; import com.extjs.gxt.ui.client.widget.grid.ColumnConfig; import com.extjs.gxt.ui.client.widget.grid.ColumnData; import com.extjs.gxt.ui.client.widget.grid.ColumnModel; import com.extjs.gxt.ui.client.widget.grid.Grid; import com.extjs.gxt.ui.client.widget.grid.GridCellRenderer; import com.extjs.gxt.ui.client.widget.layout.VBoxLayout; import java.util.Arrays; import java.util.List; import org.sigmah.client.i18n.I18N; import org.sigmah.client.ui.presenter.contact.ContactHistoryPresenter; import org.sigmah.client.ui.view.base.AbstractView; import org.sigmah.client.ui.widget.layout.Layouts; import org.sigmah.client.ui.widget.panel.Panels; import org.sigmah.client.util.ImageProvider; import org.sigmah.offline.sync.SuccessCallback; import org.sigmah.shared.command.result.ContactHistory; public class ContactHistoryView extends AbstractView implements ContactHistoryPresenter.View { private static final int RESIZE_DELAY = 200; private static final int PADDING = 10; private LayoutContainer container; private Grid<ContactHistory> contactHistoryGrid; private ImageProvider imageProvider; @Override public void initialize() { contactHistoryGrid = new Grid<ContactHistory>(new ListStore<ContactHistory>(), buildColumnModel()); contactHistoryGrid.getView().setForceFit(true); contactHistoryGrid.setAutoHeight(true); contactHistoryGrid.addListener(Events.ViewReady, new Listener<BaseEvent>() { @Override public void handleEvent(BaseEvent be) { resizeGrid(contactHistoryGrid, container, true); } }); Window.addResizeHandler(new ResizeHandler() { @Override public void onResize(ResizeEvent event) { resizeGrid(contactHistoryGrid, container, false); } }); container = Panels.content(null, false, Layouts.vBoxLayout(VBoxLayout.VBoxLayoutAlign.STRETCH, new Layouts.LayoutOptions(new Padding(10))), "x-border-layout-ct"); container.setScrollMode(Style.Scroll.AUTOY); container.add(contactHistoryGrid); add(container); } @Override public void updateGridData(List<ContactHistory> contactHistories) { contactHistoryGrid.getStore().removeAll(); contactHistoryGrid.getStore().add(contactHistories); resizeGrid(contactHistoryGrid, container, false); } @Override public void setImageProvider(ImageProvider imageProvider) { this.imageProvider = imageProvider; } private ColumnModel buildColumnModel() { ColumnConfig dateColumn = new ColumnConfig(ContactHistory.UPDATED_AT, 120); dateColumn.setRenderer(new GridCellRenderer<ContactHistory>() { @Override public Object render(ContactHistory contactHistory, String property, ColumnData config, int rowIndex, int colIndex, ListStore store, Grid grid) { return DateTimeFormat.getFormat(DateTimeFormat.PredefinedFormat.DATE_TIME_SHORT) .format(contactHistory.getUpdatedAt()); } }); dateColumn.setHeaderText(I18N.CONSTANTS.contactHistoryUpdatedAtHeader()); ColumnConfig userColumn = new ColumnConfig(ContactHistory.USER_FULL_NAME, I18N.CONSTANTS.contactHistoryUserHeader(), 150); ColumnConfig changeTypeColumn = new ColumnConfig(ContactHistory.FORMATTED_CHANGE_TYPE, I18N.CONSTANTS.contactHistoryChangeTypeHeader(), 150); ColumnConfig subjectColumn = new ColumnConfig(ContactHistory.SUBJECT, I18N.CONSTANTS.contactHistorySubjectHeader(), 150); ColumnConfig valueColumn = new ColumnConfig(ContactHistory.FORMATTED_VALUE, 150); valueColumn.setRenderer(new GridCellRenderer<ContactHistory>() { @Override public Object render(ContactHistory contactHistory, String property, ColumnData config, int rowIndex, int colIndex, ListStore<ContactHistory> store, Grid<ContactHistory> grid) { if (contactHistory.getValueType() == ContactHistory.ValueType.STRING) { return contactHistory.getFormattedValue(); } final Image image = new Image(); image.setWidth("100px"); imageProvider.provideDataUrl(contactHistory.getFormattedValue(), new SuccessCallback<String>() { @Override public void onSuccess(String dataUrl) { image.setUrl(dataUrl); } }); return image; } }); valueColumn.setHeaderText(I18N.CONSTANTS.contactHistoryValueHeader()); ColumnConfig commentColumn = new ColumnConfig(ContactHistory.COMMENT, I18N.CONSTANTS.contactHistoryCommentHeader(), 150); return new ColumnModel( Arrays.asList(dateColumn, userColumn, changeTypeColumn, subjectColumn, valueColumn, commentColumn)); } private void resizeGrid(final Grid grid, final LayoutContainer container, final boolean canBeDelayed) { new Timer() { @Override public void run() { if (!grid.isVisible()) { if (canBeDelayed) { this.schedule(RESIZE_DELAY); } return; } grid.setAutoHeight(false); int height; int maxHeight = container.getHeight() - PADDING * 2; int unwrappedGridHeight = grid.getView().getScroller().firstChild().getHeight() + grid.getView().getHeader().getHeight(); if (unwrappedGridHeight < maxHeight) { height = unwrappedGridHeight; } else { height = maxHeight; } if (grid.getHeight() == height) { return; } grid.setHeight(height); grid.getView().layout(); } }.schedule(RESIZE_DELAY); } }