Java tutorial
/******************************************************************************* * This file is part of OpenNMS(R). * * Copyright (C) 2012-2014 The OpenNMS Group, Inc. * OpenNMS(R) is Copyright (C) 1999-2014 The OpenNMS Group, Inc. * * OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc. * * OpenNMS(R) is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published * by the Free Software Foundation, either version 3 of the License, * or (at your option) any later version. * * OpenNMS(R) 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with OpenNMS(R). If not, see: * http://www.gnu.org/licenses/ * * For more information contact: * OpenNMS(R) Licensing <license@opennms.org> * http://www.opennms.org/ * http://www.opennms.com/ *******************************************************************************/ package org.opennms.features.gwt.ksc.add.client.view; import java.util.List; import org.opennms.features.gwt.ksc.add.client.KscReport; import com.google.gwt.cell.client.AbstractSafeHtmlCell; import com.google.gwt.core.client.GWT; import com.google.gwt.dom.client.Style.Unit; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.KeyDownEvent; import com.google.gwt.event.dom.client.KeyDownHandler; import com.google.gwt.event.dom.client.KeyUpEvent; import com.google.gwt.event.dom.client.KeyUpHandler; import com.google.gwt.event.logical.shared.ResizeEvent; import com.google.gwt.event.logical.shared.ResizeHandler; import com.google.gwt.safehtml.shared.SafeHtml; import com.google.gwt.safehtml.shared.SafeHtmlBuilder; import com.google.gwt.text.shared.SafeHtmlRenderer; import com.google.gwt.uibinder.client.UiBinder; import com.google.gwt.uibinder.client.UiField; import com.google.gwt.uibinder.client.UiHandler; import com.google.gwt.uibinder.client.UiTemplate; import com.google.gwt.user.cellview.client.CellList; import com.google.gwt.user.cellview.client.SimplePager; import com.google.gwt.user.client.Window; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.Composite; import com.google.gwt.user.client.ui.FlowPanel; import com.google.gwt.user.client.ui.Label; import com.google.gwt.user.client.ui.LayoutPanel; import com.google.gwt.user.client.ui.PopupPanel; import com.google.gwt.user.client.ui.PopupPanel.PositionCallback; import com.google.gwt.user.client.ui.TextBox; import com.google.gwt.user.client.ui.Widget; import com.google.gwt.view.client.ListDataProvider; import com.google.gwt.view.client.SelectionChangeEvent; import com.google.gwt.view.client.SingleSelectionModel; public class KscAddGraphViewImpl extends Composite implements KscAddGraphView<KscReport> { public class KscReportCell extends AbstractSafeHtmlCell<KscReport> { public KscReportCell() { super(new SafeHtmlRenderer<KscReport>() { @Override public SafeHtml render(final KscReport reportDetail) { return new SafeHtml() { private static final long serialVersionUID = -8194796300806582660L; @Override public String asString() { return reportDetail.getLabel(); } }; } @Override public void render(final KscReport reportDetail, final SafeHtmlBuilder builder) { builder.appendEscaped(reportDetail.getLabel()); } }); } @Override protected void render(final Context context, final SafeHtml value, final SafeHtmlBuilder sb) { sb.append(value); } } private static KscAddGraphViewImplUiBinder uiBinder = GWT.create(KscAddGraphViewImplUiBinder.class); @UiTemplate("KscAddGraphViewImpl.ui.xml") interface KscAddGraphViewImplUiBinder extends UiBinder<Widget, KscAddGraphViewImpl> { } @UiField LayoutPanel m_layoutPanel; @UiField TextBox m_titleBox; @UiField TextBox m_textBox; @UiField Button m_addButton; @UiField Label m_titleLabel; @UiField Label m_reportLabel; CellList<KscReport> m_reportList; SimplePager m_pager; PopupPanel m_popupPanel; private Presenter<KscReport> m_presenter; private ListDataProvider<KscReport> m_dataList; private SingleSelectionModel<KscReport> m_selectionModel; private PositionCallback m_repositionPopupPanel; public KscAddGraphViewImpl() { initWidget(uiBinder.createAndBindUi(this)); m_layoutPanel.setSize("100%", "75px"); m_textBox.addKeyDownHandler(new KeyDownHandler() { @Override public void onKeyDown(final KeyDownEvent event) { if (m_presenter != null) { m_presenter.onKeyCodeEvent(event, getSearchText()); } } }); m_textBox.addKeyUpHandler(new KeyUpHandler() { @Override public void onKeyUp(final KeyUpEvent event) { if (m_presenter != null) { m_presenter.onKeyCodeEvent(event, getSearchText()); } } }); m_selectionModel = new SingleSelectionModel<KscReport>(); m_selectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() { @Override public void onSelectionChange(final SelectionChangeEvent event) { if (getSelectedReport() != null) { m_textBox.setValue(getSelectedReport().getLabel(), false); m_popupPanel.hide(); } } }); m_titleLabel.getElement().getStyle().setFontSize(12, Unit.PX); m_reportLabel.getElement().getStyle().setFontSize(12, Unit.PX); m_reportList = new CellList<KscReport>(new KscReportCell()); m_reportList.setPageSize(10); m_reportList.getElement().getStyle().setFontSize(12, Unit.PX); m_reportList.setSelectionModel(m_selectionModel); m_dataList = new ListDataProvider<KscReport>(); m_dataList.addDataDisplay(m_reportList); m_pager = new SimplePager(); m_pager.setStyleName("onms-table-no-borders-margin"); m_pager.getElement().getStyle().setWidth(100, Unit.PCT); m_pager.setDisplay(m_reportList); final FlowPanel flowPanel = new FlowPanel(); flowPanel.add(m_reportList); flowPanel.add(m_pager); m_popupPanel = new PopupPanel(); m_popupPanel.add(flowPanel); m_popupPanel.setAutoHideEnabled(true); m_popupPanel.setAnimationEnabled(false); m_popupPanel.setModal(false); m_popupPanel.getElement().getStyle().setBorderWidth(1, Unit.PX); m_popupPanel.getElement().getStyle().setBorderColor("#B5B8C8"); m_popupPanel.getElement().getStyle().setPadding(1, Unit.PX); m_repositionPopupPanel = new PositionCallback() { @Override public void setPosition(final int offsetWidth, final int offsetHeight) { m_popupPanel.setWidth((getOffsetWidth() - 5) + "px"); m_popupPanel.setPopupPosition(getAbsoluteLeft(), getAbsoluteTop() + 74); } }; Window.addResizeHandler(new ResizeHandler() { @Override public void onResize(final ResizeEvent event) { if (m_popupPanel.isShowing()) { m_popupPanel.setPopupPositionAndShow(m_repositionPopupPanel); } } }); } @Override public String getSearchText() { return m_textBox.getText(); } @Override public void setPresenter(final Presenter<KscReport> presenter) { m_presenter = presenter; } @Override public void setDataList(final List<KscReport> dataList) { m_dataList.setList(dataList); } @Override public String getTitle() { return m_titleBox.getValue(); } @Override public void setTitle(final String title) { m_titleBox.setValue(title == null ? "" : title); } @Override public KscReport getSelectedReport() { return m_selectionModel.getSelectedObject(); } @Override public void select(final KscReport report) { m_selectionModel.setSelected(report, true); } @Override public void clearSelection() { m_selectionModel.setSelected(m_selectionModel.getSelectedObject(), false); } @UiHandler("m_addButton") public void handleAddButton(final ClickEvent event) { m_presenter.onAddButtonClicked(); } @Override public boolean isPopupShowing() { return m_popupPanel.isShowing(); } @Override public void hidePopup() { m_popupPanel.hide(); } @Override public void showPopup() { if (!m_popupPanel.isShowing()) { m_popupPanel.setPopupPositionAndShow(m_repositionPopupPanel); } } }