--- /dev/null
+/*
+ * Copyright (C) 2008 ZXing authors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.zxing.web.generator.client;
+
+import com.google.gwt.core.client.EntryPoint;
+import com.google.gwt.dom.client.Element;
+import com.google.gwt.http.client.URL;
+import com.google.gwt.user.client.DOM;
+import com.google.gwt.user.client.ui.Button;
+import com.google.gwt.user.client.ui.ChangeListener;
+import com.google.gwt.user.client.ui.ClickListener;
+import com.google.gwt.user.client.ui.Grid;
+import com.google.gwt.user.client.ui.HTML;
+import com.google.gwt.user.client.ui.HorizontalPanel;
+import com.google.gwt.user.client.ui.Image;
+import com.google.gwt.user.client.ui.ListBox;
+import com.google.gwt.user.client.ui.RootPanel;
+import com.google.gwt.user.client.ui.SimplePanel;
+import com.google.gwt.user.client.ui.TextBox;
+import com.google.gwt.user.client.ui.VerticalPanel;
+import com.google.gwt.user.client.ui.Widget;
+import com.google.gwt.user.client.ui.HTMLTable.CellFormatter;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Entry point classes define <code>onModuleLoad()</code>. Setup the page, and loads
+ * all different generators.
+ *
+ * @author Yohann Coppel
+ */
+public class Generator implements EntryPoint {
+// public static final StringConstants S = GWT.create(StringConstants.class);
+ private final List<GeneratorSource> generators = new ArrayList<GeneratorSource>();
+ ListBox genList = new ListBox();
+ ListBox sizeList = new ListBox();
+ Image result = new Image("");//http://chart.apis.google.com/chart?cht=qr&chs=300x300&chl=http://google.com");
+ Grid topPanel = new Grid(5, 1);
+ GeneratorSource selectedGenerator = null;
+ private Button generateButton;
+ VerticalPanel rightPanel = new VerticalPanel();
+ TextBox urlResult = new TextBox();
+ HTML downloadText = new HTML("<a href=\"\" id=\"downloadlink\" >Download</a> or embed with this URL:");
+ //Element errorElement = null;
+
+ public void onModuleLoad() {
+ loadGenerators();
+
+ HorizontalPanel mainPanel = new HorizontalPanel();
+ setupLeftPanel();
+ topPanel.getElement().setId("leftpanel");
+ Widget leftPanel = topPanel;
+
+ mainPanel.add(leftPanel);
+
+ SimplePanel div = new SimplePanel();
+ SimplePanel div2 = new SimplePanel();
+ div2.add(result);
+ div2.getElement().setId("innerresult");
+ div.add(div2);
+ div.getElement().setId("imageresult");
+
+ urlResult.getElement().setId("urlresult");
+ downloadText.getElement().setId("downloadText");
+ rightPanel.add(div);
+ rightPanel.add(downloadText);
+ rightPanel.add(urlResult);
+ mainPanel.add(rightPanel);
+ mainPanel.getElement().setId("mainpanel");
+ RootPanel.get("ui").add(mainPanel);
+ //RootPanel.get().add(output);
+ //output.setHeight("200px");
+ //output.setWidth("500px");
+ setWidget(1);
+ invalidateBarcode();
+ }
+
+ private void setWidget(int id) {
+ if (id >= 0 && id < generators.size()) {
+ topPanel.setWidget(1, 0, generators.get(id).getWidget());
+ genList.setSelectedIndex(id);
+ selectedGenerator = generators.get(id);
+ eraseErrorMessage();
+ invalidateBarcode();
+ genList.setFocus(false);
+ selectedGenerator.setFocus();
+ }
+ }
+
+ private void loadGenerators() {
+ generators.add(new CalendarEventGenerator(changeListener));
+ generators.add(new ContactInfoGenerator(changeListener));
+ generators.add(new EmailGenerator(changeListener));
+ generators.add(new GeoLocationGenerator(changeListener));
+ generators.add(new PhoneNumberGenerator(changeListener));
+ generators.add(new SmsAddressGenerator(changeListener));
+ generators.add(new TextGenerator(changeListener));
+ generators.add(new UrlGenerator(changeListener));
+ }
+
+ public void setupLeftPanel() {
+ topPanel.setHTML(2, 0,
+ "<span id=\"errorMessageID\" class=\""+StylesDefs.ERROR_MESSAGE+"\"></span>");
+
+ // fills up the list of generators
+ for(GeneratorSource generator: generators) {
+ genList.addItem(generator.getName());
+ setGridStyle(generator.getWidget());
+ }
+
+ sizeList.addItem("S", "120");
+ sizeList.addItem("M", "230");
+ sizeList.addItem("L", "350");
+ sizeList.setSelectedIndex(2);
+
+ // updates the second row of the table with the content of the selected
+ // generator
+ genList.addChangeListener(new ChangeListener() {
+ public void onChange(Widget sender) {
+ int i = genList.getSelectedIndex();
+ setWidget(i);
+ }
+ });
+
+ // grid for the generator picker
+ Grid selectionTable = new Grid(1, 2);
+ selectionTable.setText(0, 0, "Contents");
+ selectionTable.setWidget(0, 1, genList);
+ setGridStyle(selectionTable);
+
+ topPanel.setWidget(0, 0, selectionTable);
+
+ // grid for the generate button
+ Grid generateGrid = new Grid(1, 2);
+ setGridStyle(generateGrid);
+
+ generateButton = new Button("Generate →");
+ generateButton.addClickListener(new ClickListener() {
+ public void onClick(Widget sender) {
+ generate();
+ }
+ });
+ generateGrid.setWidget(0,1,generateButton);
+ topPanel.setWidget(4, 0, generateGrid);
+
+ Grid sizeTable = new Grid(1, 2);
+ sizeTable.setText(0, 0, "Barcode size");
+ sizeTable.setWidget(0, 1, sizeList);
+ setGridStyle(sizeTable);
+ topPanel.setWidget(3, 0, sizeTable);
+ }
+
+ protected void setGridStyle(Grid grid) {
+ grid.getColumnFormatter().addStyleName(0, "firstColumn");
+ grid.getColumnFormatter().addStyleName(1, "secondColumn");
+ CellFormatter cellFormatter = grid.getCellFormatter();
+ for(int i = 0; i < grid.getRowCount(); ++i) {
+ cellFormatter.addStyleName(i, 0, "firstColumn");
+ cellFormatter.addStyleName(i, 1, "secondColumn");
+ }
+ }
+
+ protected String getUrl(int sizeX, int sizeY, String content) {
+ String result = "http://chart.apis.google.com/chart?cht=qr&chs=";
+ result += sizeX;
+ result += "x";
+ result += sizeY;
+ result += "&chl=";
+ result += URL.encode(content);
+ return result;
+ }
+
+ private void generate() {
+ try {
+ String text = selectedGenerator.getText();
+ eraseErrorMessage();
+ int size = Integer.parseInt(sizeList
+ .getValue(sizeList.getSelectedIndex()));
+ String url = getUrl(size, size, text);
+ result.setUrl(url);
+ result.setVisible(true);
+ urlResult.setText(url);
+ urlResult.setVisible(true);
+ Element linkElement = DOM.getElementById("downloadlink");
+ linkElement.setAttribute("href", url);
+ downloadText.setVisible(true);
+ } catch (GeneratorException ex) {
+ invalidateBarcode();
+ String error = ex.getMessage();
+ showErrorMessage(error);
+ }
+ }
+
+ public void invalidateBarcode() {
+ result.setVisible(false);
+ urlResult.setText("");
+ urlResult.setVisible(false);
+ Element linkElement = DOM.getElementById("downloadlink");
+ linkElement.setAttribute("href", "");
+ downloadText.setVisible(false);
+ }
+
+ public void showErrorMessage(String error) {
+ Element errorElement = DOM.getElementById("errorMessageID");
+ errorElement.setInnerHTML(error);
+ }
+
+ public void eraseErrorMessage() {
+ Element errorElement = DOM.getElementById("errorMessageID");
+ errorElement.setInnerHTML(" ");
+ }
+
+ public ChangeListener changeListener = new ChangeListener() {
+ public void onChange(Widget sender) {
+ try {
+ selectedGenerator.validate(sender);
+ eraseErrorMessage();
+ } catch (GeneratorException ex) {
+ String error = ex.getMessage();
+ showErrorMessage(error);
+ invalidateBarcode();
+ }
+ }
+ };
+
+}
projects / zxing.git / blobdiff