Java tutorial
/******************************************************************************* * This file is part of OpenNMS(R). * * Copyright (C) 2010-2011 The OpenNMS Group, Inc. * OpenNMS(R) is Copyright (C) 1999-2011 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 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 General Public License for more details. * * You should have received a copy of the GNU 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.dashboard.client.portlet; import org.opennms.features.dashboard.client.dnd.ResizeDragController; import com.allen_sauer.gwt.dnd.client.DragController; import com.google.gwt.core.client.GWT; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.user.client.DOM; import com.google.gwt.user.client.ui.FocusPanel; import com.google.gwt.user.client.ui.Grid; import com.google.gwt.user.client.ui.HTMLTable.CellFormatter; import com.google.gwt.user.client.ui.Image; import com.google.gwt.user.client.ui.Panel; import com.google.gwt.user.client.ui.Widget; import com.google.gwt.user.client.ui.SimplePanel; /** * author: Tharindu Munasinghe (tharindumunasinghe@gmail.com) * org.opennms.features.dashboard */ public abstract class BasicPortlet extends FocusPanel implements IBasicPortlet { // protected WidgetResource imageResource = WidgetResource.WIDGETRESOURCE; // protected WidgetCssResource cssResource = // imageResource.widgetsCssResource(); public static final int DIRECTION_EAST = 0x0001; public static final int DIRECTION_NORTH = 0x0002; public static final int DIRECTION_SOUTH = 0x0004; public static final int DIRECTION_WEST = 0x0008; public static final DirectionConstant EAST = new DirectionConstant(DIRECTION_EAST, "e"); public static final DirectionConstant NORTH = new DirectionConstant(DIRECTION_NORTH, "n"); public static final DirectionConstant NORTH_EAST = new DirectionConstant(DIRECTION_NORTH | DIRECTION_EAST, "ne"); public static final DirectionConstant NORTH_WEST = new DirectionConstant(DIRECTION_NORTH | DIRECTION_WEST, "nw"); public static final DirectionConstant SOUTH = new DirectionConstant(DIRECTION_SOUTH, "s"); public static final DirectionConstant SOUTH_EAST = new DirectionConstant(DIRECTION_SOUTH | DIRECTION_EAST, "se"); public static final DirectionConstant SOUTH_WEST = new DirectionConstant(DIRECTION_SOUTH | DIRECTION_WEST, "sw"); public static final DirectionConstant WEST = new DirectionConstant(DIRECTION_WEST, "w"); private static final int BORDER_THICKNESS = 2; protected static final int TITLE_HEIGHT = 22; protected static final int BUTTON_PANEL_HEIGHT = 23; private static BasicPortlet focusedPortlet; /** * Main layout panel of the portlet */ private Grid mainPanel; /** * Panel which contains the title & the body panel */ private Widget eastWidget; private boolean initialLoad = false; private Widget southWidget; private Panel cornerWidget; private Grid containerPanel; protected FocusPanel titlePanel; protected SimplePanel contentpanel; protected ClickHandler closeHandler; private DragController moveDragController; private ResizeDragController resizeDragController; private int contentHeight; private int contentWidth; public BasicPortlet() { mainPanel = new Grid(3, 3); mainPanel.getCellFormatter().setWidth(0, 0, BORDER_THICKNESS + "px"); mainPanel.getCellFormatter().setHeight(0, 0, BORDER_THICKNESS + "px"); mainPanel.getCellFormatter().setWidth(2, 2, BORDER_THICKNESS + "px"); mainPanel.getCellFormatter().setHeight(2, 2, BORDER_THICKNESS + "px"); mainPanel.setCellSpacing(0); mainPanel.setCellPadding(0); this.add(mainPanel); this.addStyleName("popup-WindowPanel"); mainPanel.addStyleName("borderPanel"); DOM.setStyleAttribute(this.getElement(), "zIndex", "20000"); DOM.setStyleAttribute(this.getElement(), "borderColor", "#C3D9FF"); DOM.setStyleAttribute(this.getElement(), "border", "none"); DOM.setStyleAttribute(this.getElement(), "background", "none"); DOM.setStyleAttribute(this.getElement(), "padding", "0px"); DOM.setStyleAttribute(this.getElement(), "outline", "0 none"); containerPanel = new Grid(2, 1); containerPanel.setSize("100%", "100%"); containerPanel.setCellSpacing(0); containerPanel.setCellPadding(0); mainPanel.setWidget(1, 1, containerPanel); titlePanel = new FocusPanel(); containerPanel.setWidget(0, 0, titlePanel); CellFormatter cellFormatter = containerPanel.getCellFormatter(); cellFormatter.setHeight(0, 0, TITLE_HEIGHT + "px"); titlePanel.setStyleName("popup-WindowPanel-title"); // titlePanel.setSize("100%", TITLE_HEIGHT + "px"); titlePanel.setWidth("100%"); contentpanel = new SimplePanel(); contentpanel.setSize("100%", "100%"); containerPanel.setWidget(1, 0, contentpanel); setupCell(0, 0, NORTH_WEST); setupCell(0, 1, NORTH); setupCell(0, 2, NORTH_EAST); setupCell(1, 0, WEST); eastWidget = setupCell(1, 2, EAST); eastWidget.setSize(BORDER_THICKNESS + "px", "100%"); setupCell(2, 0, SOUTH_WEST); southWidget = setupCell(2, 1, SOUTH); southWidget.setSize("100%", BORDER_THICKNESS + "px"); cornerWidget = setupCell(2, 2, SOUTH_EAST); DOM.setStyleAttribute(cornerWidget.getElement(), "position", "absolute"); Image corner = new Image(GWT.getHostPageBaseURL() + "images/resize_corner.png"); cornerWidget.add(corner); DOM.setStyleAttribute(corner.getElement(), "position", "absolute"); DOM.setStyleAttribute(corner.getElement(), "right", "2px"); DOM.setStyleAttribute(corner.getElement(), "bottom", "4px"); closeHandler = new ClickHandler() { public void onClick(ClickEvent arg0) { try { BasicPortlet.this.setVisible(false); BasicPortlet.this.removeFromParent(); } catch (Exception e) { // TODO: handle exception } } }; titlePanel.addClickHandler(new ClickHandler() { public void onClick(ClickEvent arg0) { selectItem(); } }); } private Panel setupCell(int row, int col, DirectionConstant direction) { final FocusPanel widget = new FocusPanel(); widget.setPixelSize(BORDER_THICKNESS, BORDER_THICKNESS); mainPanel.setWidget(row, col, widget); return widget; } @Override public void makeResizable(ResizeDragController resizeDragController) { if (this.resizeDragController == null) { this.resizeDragController = resizeDragController; } makeNotResizable(); addResizeHandle(eastWidget, EAST); addResizeHandle(southWidget, SOUTH); addResizeHandle(cornerWidget, SOUTH_EAST); } @Override public void makeDraggable(DragController moveDragController) { if (this.moveDragController == null) { this.moveDragController = moveDragController; } makeNotDraggable(); moveDragController.makeDraggable(this, titlePanel); } @Override public void makeNotResizable() { removeResizeHandle(eastWidget, EAST); removeResizeHandle(southWidget, SOUTH); removeResizeHandle(cornerWidget, SOUTH_EAST); } private void addResizeHandle(Widget w, DirectionConstant direction) { resizeDragController.makeDraggable(w, direction); w.addStyleName("Resize-" + direction.directionLetters); } private void removeResizeHandle(Widget w, DirectionConstant direction) { if (resizeDragController != null) { try { resizeDragController.makeNotDraggable(w); } catch (Exception e) { // TODO: handle exception } } w.removeStyleName("Resize-" + direction.directionLetters); } @Override public void makeNotDraggable() { if (moveDragController != null) { try { moveDragController.makeNotDraggable(this); } catch (Exception e) { // TODO: handle exception } } } @Override protected void onLoad() { super.onLoad(); if (!initialLoad && mainPanel.getOffsetHeight() != 0) { initialLoad = true; setContentSize(mainPanel.getOffsetWidth(), mainPanel.getOffsetHeight()); } } @Override public void setContentSize(int width, int height) { if (width != contentWidth) { contentWidth = width; } if (height != contentHeight) { contentHeight = height; } mainPanel.setPixelSize(contentWidth, contentHeight); } public void selectItem() { if (focusedPortlet != this) { if (focusedPortlet != null) { focusedPortlet.removeStyleName("demo-gridview-widget-focus"); focusedPortlet.setStyleName("demo-gridview-widget"); } focusedPortlet = this; focusedPortlet.removeStyleName("demo-gridview-widget"); focusedPortlet.setStyleName("demo-gridview-widget-focus"); } } @Override public void setHeight(String height) { mainPanel.setHeight(height); } @Override public void setWidth(String width) { mainPanel.setWidth(width); } @Override public void setPixelSize(int width, int height) { mainPanel.setPixelSize(width, height); } @Override public void setSize(String width, String height) { mainPanel.setSize(width, height); } @Override public void clearPortletContent() { contentpanel.clear(); } @Override public void addPortletContent(Widget w) { contentpanel.add(w); } @Override public Widget asWidget() { return this; } @Override public void removeFromParent() { super.removeFromParent(); } @Override public int getContentHeight() { return contentHeight; } @Override public int getContentWidth() { return contentWidth; } @Override public void selectPortlet() { } }