Java tutorial
/** * Catroid: An on-device visual programming system for Android devices * Copyright (C) 2010-2014 The Catrobat Team * (<http://developer.catrobat.org/credits>) * * This program 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. * * An additional term exception under section 7 of the GNU Affero * General Public License, version 3, is available at * http://developer.catrobat.org/license_additional_term * * 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.catrobat.html5player.client; import com.google.gwt.canvas.client.Canvas; import com.google.gwt.core.client.EntryPoint; 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.Window; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.FileUpload; import com.google.gwt.user.client.ui.FlowPanel; import com.google.gwt.user.client.ui.FormPanel; import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteEvent; import com.google.gwt.user.client.ui.Label; import com.google.gwt.user.client.ui.Panel; import com.google.gwt.user.client.ui.RootPanel; import com.google.gwt.user.client.ui.TextArea; import com.google.gwt.user.client.ui.VerticalPanel; public class Html5Player implements EntryPoint { private FlowPanel mainPanel = new FlowPanel(); private Button playButton = new Button("Play"); private Button showLogButton = new Button("ShowLogBox"); private Button rotateLeftButton = new Button("rotateLeft"); private Button rotateRightButton = new Button("rotateRight"); private Button rePlayButton = new Button("RePlay"); private Button zoomInButton = new Button("+"); private Button zoomOutButton = new Button("-"); private TextArea logBox = new TextArea(); private VerticalPanel screenPanel = new VerticalPanel(); private Label uploadLabel = new Label("Upload a project file:"); private Canvas rootCanvas; private ServerConnectionCalls server; //private ListBox projectListBox = new ListBox(); private static int rotationAngle = 0; Button uploadButton = new Button("Upload File"); final FormPanel form = new FormPanel(); //########################################################################## public void onModuleLoad() { mainPanel.add(rotateLeftButton); mainPanel.add(rotateRightButton); final String projectFileUrl = Window.Location.getParameter("projectfileurl"); final String projectNumber = Window.Location.getParameter("projectnumber"); if (projectFileUrl != null) { mainPanel.add(rePlayButton); mainPanel.add(zoomInButton); mainPanel.add(zoomOutButton); mainPanel.add(screenPanel); } else { // String projectPath = Window.Location.getParameter("projectpath"); // if(projectPath != null && !projectPath.equals("")) // { // Const.PROJECT_PATH = projectPath; // } if (projectNumber == null) { // mainPanel.add(playButton); // playButton.ensureDebugId("playButton"); // // mainPanel.add(projectListBox); // playButton.ensureDebugId("projectListBox"); // // mainPanel.add(showLogButton); // showLogButton.ensureDebugId("showLogBox"); // // mainPanel.add(screenPanel); // screenPanel.add(logBox); mainPanel.add(rePlayButton); mainPanel.add(zoomInButton); mainPanel.add(zoomOutButton); VerticalPanel panel = new VerticalPanel(); //create a file upload widget final FileUpload fileUpload = new FileUpload(); //create upload button //pass action to the form to point to service handling file //receiving operation. form.setAction(GWT.getModuleBaseURL() + "fileupload"); // set form to use the POST method, and multipart MIME encoding. form.setEncoding(FormPanel.ENCODING_MULTIPART); form.setMethod(FormPanel.METHOD_POST); fileUpload.setName("uploadFormElement"); panel.add(fileUpload); //add a button to upload the file panel.add(uploadButton); uploadButton.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { //get the filename to be uploaded String filename = fileUpload.getFilename(); if (filename.length() == 0) { Window.alert("No File Specified!"); } else { form.submit(); } } }); form.add(panel); mainPanel.add(uploadLabel); mainPanel.add(form); mainPanel.add(screenPanel); } else { mainPanel.add(rePlayButton); mainPanel.add(zoomInButton); mainPanel.add(zoomOutButton); mainPanel.add(screenPanel); } } if (Scene.get().createScene() == false) { //TODO exception if canvas not supported? CatrobatDebug.error("Canvas not supported"); return; } rootCanvas = Scene.get().getCanvas(); screenPanel.add(rootCanvas); rootCanvas.ensureDebugId("rootCanvas"); //populateProjectsListBox(); RootPanel.get("firstWindow").add(mainPanel); final Stage stage = Stage.getInstance(); stage.setCanvas(rootCanvas); stage.setLogBox(logBox); stage.defaultLogBoxSettings(); server = new ServerConnectionCalls(); playButton.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { rotationAngle = 0; rotateDirection(0, screenPanel); CatrobatDebug.info("Play button was clicked, project: " + projectNumber + " is selected"); stage.clearStage(); stage.displayLoadingImage(); stage.setProjectNumber(projectNumber); //get xml-projectfile from server server.getXML(projectNumber); } }); form.addSubmitCompleteHandler(new FormPanel.SubmitCompleteHandler() { @Override public void onSubmitComplete(SubmitCompleteEvent event) { //Window.alert(event.getResults()); rotationAngle = 0; rotateDirection(0, screenPanel); //int selectedIndex = projectListBox.getSelectedIndex(); //String projectNumber = projectListBox.getValue(selectedIndex); stage.clearStage(); stage.displayLoadingImage(); stage.setProjectNumber(projectNumber); server.getXML(); } }); //handle click on the log-button // showLogButton.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { logBox.setVisible(!logBox.isVisible()); } }); //handle click on the rotateLeft-button // rotateLeftButton.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { rotateLeft(screenPanel); } }); //handle click on the rotateRight-button // rotateRightButton.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { rotateRight(screenPanel); } }); //handle click on the replay-button // rePlayButton.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { stage.clearStage(); stage.displayLoadingImage(); stage.setProjectNumber(projectNumber); if (projectNumber != null) { server.getXML(projectNumber); } else { server.getXML(); } } }); //handle click on the zoomIn-button // zoomInButton.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { double twice = 2; Scene.get().zoomScene(twice); } }); //handle click on the zoomOut-button // zoomOutButton.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { double half = 0.5; Scene.get().zoomScene(half); } }); //handle click on the canvas // rootCanvas.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { stage.getSpriteManager().handleScreenClick( getRelativeXforRotation(event.getRelativeX(rootCanvas.getCanvasElement()), event.getRelativeY(rootCanvas.getCanvasElement()), screenPanel), getRelativeYforRotation(event.getRelativeX(rootCanvas.getCanvasElement()), event.getRelativeY(rootCanvas.getCanvasElement()), screenPanel)); } }); // if(projectNumber != null) // { // CatrobatDebug.on(); // stage.clearStage(); // // stage.displayLoadingImage(); // // stage.setProjectNumber(projectNumber); // server.getXML(projectNumber); // } if (projectFileUrl != null) { stage.clearStage(); stage.displayLoadingImage(); server.getXMLFromProjectFileUrl(projectFileUrl); } } public static int getRelativeXforRotation(int x, int y, Panel panel) { int width = panel.getOffsetWidth(); if (width == 0) width = getNumberFromCssAttribut(panel.getElement().getStyle().getWidth()); int height = panel.getOffsetHeight(); if (height == 0) height = getNumberFromCssAttribut(panel.getElement().getStyle().getHeight()); if (rotationAngle == 180 || rotationAngle == -180) { return width - x; } else if (rotationAngle == 90 || rotationAngle == -270) { return y; } else if (rotationAngle == -90 || rotationAngle == 270) { return width - y; } return x; } public static int getRelativeYforRotation(int x, int y, Panel panel) { int width = panel.getOffsetWidth(); if (width == 0) width = getNumberFromCssAttribut(panel.getElement().getStyle().getWidth()); int height = panel.getOffsetHeight(); if (height == 0) height = getNumberFromCssAttribut(panel.getElement().getStyle().getHeight()); if (rotationAngle == 180 || rotationAngle == -180) { return height - y; } else if (rotationAngle == 90 || rotationAngle == -270) { return height - x; } else if (rotationAngle == -90 || rotationAngle == 270) { return x; } return y; } public static void rotateRight(Panel panel) { rotateDirection(90, panel); } public static void rotateLeft(Panel panel) { rotateDirection(-90, panel); } private static void rotateDirection(int degree, Panel panel) { int width = panel.getOffsetWidth(); if (width == 0) width = getNumberFromCssAttribut(panel.getElement().getStyle().getWidth()); int height = panel.getOffsetHeight(); if (height == 0) height = getNumberFromCssAttribut(panel.getElement().getStyle().getHeight()); int translation = 0; rotationAngle = (rotationAngle + degree) % 360; if (Math.abs(rotationAngle) != 0 && Math.abs(rotationAngle) != 180) { if ((degree > 0)) { translation = (width / 2) - (height / 2); } else { translation = (height / 2) - (width / 2); } if (rotationAngle != degree) { translation = translation * -1; } } CatrobatDebug .debug("translation: " + translation + " rotationAngle: " + rotationAngle + " degree: " + degree); panel.getElement().getStyle().setProperty("transform", "rotate(" + rotationAngle + "deg) translate(" + translation + "px," + translation + "px)"); panel.getElement().getStyle().setProperty("WebkitTransform", "rotate(" + rotationAngle + "deg) translate(" + translation + "px," + translation + "px)"); panel.getElement().getStyle().setProperty("MsTransform", "rotate(" + rotationAngle + "deg) translate(" + translation + "px," + translation + "px)"); panel.getElement().getStyle().setProperty("OTransform", "rotate(" + rotationAngle + "deg) translate(" + translation + "px," + translation + "px)"); panel.getElement().getStyle().setProperty("MozTransform", "rotate(" + rotationAngle + "deg) translate(" + translation + "px," + translation + "px)"); } private static int getNumberFromCssAttribut(String attr) { if (attr != null && !attr.equals("")) { String numberPart = attr.trim().split("[a-z]")[0]; return Integer.parseInt(numberPart); } return 0; } public static int getRotationAngle() { return rotationAngle; } }