Java tutorial
/** * @author Nigel Cook * * (C) Copyright 2010-2012. Nigel Cook. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * Licensed under the terms described in LICENSE file that accompanied this code, (the "License"); you may not use this file * except in compliance with the License. * * 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 n3phele.client.widgets; import n3phele.client.N3phele; import n3phele.client.presenter.RepoContentActivity; import com.google.gwt.cell.client.Cell; import com.google.gwt.core.client.GWT; import com.google.gwt.event.dom.client.ChangeEvent; import com.google.gwt.event.dom.client.ChangeHandler; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.user.cellview.client.CellWidget; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.FileUpload; import com.google.gwt.user.client.ui.FlexTable; import com.google.gwt.user.client.ui.FlowPanel; import com.google.gwt.user.client.ui.FormPanel; import com.google.gwt.user.client.ui.HTML; import com.google.gwt.user.client.ui.Hidden; import com.google.gwt.user.client.ui.HorizontalPanel; import com.google.gwt.user.client.ui.Image; import com.google.gwt.user.client.ui.InlineHTML; import com.google.gwt.user.client.ui.PopupPanel; import com.google.gwt.user.client.ui.PushButton; import com.google.gwt.user.client.ui.TextBox; /** * @author Nigel Cook * * (C) Copyright 2010. All rights reserved. * * */ public class S3UploadPanel extends FormPanel implements UploadPanel { private static S3UploadPanel instance = null; private PopupPanel uploadPopup; private FlexTable table; private HorizontalPanel header; private PushButton quitWidget; private TextBox filename; private HTML destination; private FlowPanel flow; private Hidden key; private Hidden awsAccessKeyId; private Hidden acl; private Hidden policy; private Hidden signature; private Hidden contentType; private RepoContentActivity activity; private String path; private String canonicalName; private Button upload; private FileUpload fileUpload; private Hidden success_action; private boolean cancelled = true; protected S3UploadPanel() { this.setWidth("500px"); flow = new FlowPanel(); this.add(flow); this.addStyleName(N3phele.n3pheleResource.css().workspacePanel()); Cell<MenuItem> cell = new IconTextCell<MenuItem>(32, 32); header = new HorizontalPanel(); header.setWidth("100%"); header.addStyleName(N3phele.n3pheleResource.css().workspacePanelHeader()); header.add(new CellWidget<MenuItem>(cell, new MenuItem(N3phele.n3pheleResource.uploadIcon(), "File Upload", null))); flow.add(header); quitWidget = new PushButton(new Image(N3phele.n3pheleResource.dialog_close()), new ClickHandler() { @Override public void onClick(ClickEvent event) { cancelled = true; S3UploadPanel.this.uploadPopup.hide(); } }); quitWidget.setWidth(N3phele.n3pheleResource.dialog_close().getWidth() + 4 + "px"); quitWidget.setHeight(N3phele.n3pheleResource.dialog_close().getHeight() + 4 + "px"); header.add(quitWidget); header.setCellHorizontalAlignment(quitWidget, HorizontalPanel.ALIGN_RIGHT); header.setCellVerticalAlignment(quitWidget, HorizontalPanel.ALIGN_TOP); this.setEncoding(FormPanel.ENCODING_MULTIPART); this.setMethod(FormPanel.METHOD_POST); key = new Hidden("key"); flow.add(key); awsAccessKeyId = new Hidden("AWSAccessKeyId"); flow.add(awsAccessKeyId); acl = new Hidden("acl", "private"); flow.add(acl); success_action = new Hidden("success_action_status", "201"); flow.add(success_action); policy = new Hidden("policy"); flow.add(policy); signature = new Hidden("signature"); flow.add(signature); contentType = new Hidden("Content-Type"); flow.add(contentType); table = new FlexTable(); flow.add(table); table.setWidth("490px"); fileUpload = new FileUpload(); fileUpload.setName("file"); fileUpload.setWidth("100%"); fileUpload.addChangeHandler(new ChangeHandler() { @Override public void onChange(ChangeEvent event) { filename.setText(getFilename(fileUpload.getFilename())); upload.setEnabled(fileUpload.getFilename() != null && fileUpload.getFilename().length() > 0); } }); InlineHTML step1 = new InlineHTML("Step 1:"); step1.setStyleName(N3phele.n3pheleResource.css().repoContentElementName()); table.setWidget(0, 0, step1); InlineHTML step1Text = new InlineHTML("Choose file to upload"); step1Text.setStyleName(N3phele.n3pheleResource.css().repoContentElementName()); table.setWidget(0, 1, step1Text); table.setWidget(0, 2, fileUpload); InlineHTML step2 = new InlineHTML("Step 2:"); step2.setStyleName(N3phele.n3pheleResource.css().repoContentElementName()); table.setWidget(1, 0, step2); InlineHTML step2Text = new InlineHTML("Set Destination"); step2Text.setStyleName(N3phele.n3pheleResource.css().repoContentElementName()); table.setWidget(1, 1, step2Text); destination = new HTML("/"); table.setWidget(1, 2, destination); destination.setStyleName(N3phele.n3pheleResource.css().repoContentUploadPath()); filename = new TextBox(); table.setWidget(1, 3, filename); upload = new Button("upload"); upload.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { canonicalName = path; if (path == null || path.length() == 0) { canonicalName = filename.getText().trim(); } else { canonicalName = path + filename.getText().trim(); ; } if (activity != null) { upload.setEnabled(false); activity.getSignature(canonicalName); } } }); table.setWidget(2, 3, upload); this.addSubmitHandler(new SubmitHandler() { @Override public void onSubmit(SubmitEvent event) { GWT.log("submit ..." + event.toString()); } }); this.addSubmitCompleteHandler(new SubmitCompleteHandler() { @Override public void onSubmitComplete(SubmitCompleteEvent event) { cancelled = false; S3UploadPanel.this.uploadPopup.hide(); activity.uploadComplete(canonicalName); } }); flow.add(upload); table.getFlexCellFormatter().setColSpan(0, 2, 2); table.getFlexCellFormatter().setWidth(0, 0, "10%"); table.getFlexCellFormatter().setWidth(0, 2, "70%"); // table.getFlexCellFormatter().setWidth(1, 2, "200px"); table.getFlexCellFormatter().setWidth(1, 3, "30%"); } /* (non-Javadoc) * @see n3phele.client.widgets.UploadPanel#setSignature(java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String, java.lang.String) */ @Override public void setSignature(String url, String destination, String keyId, String base64Policy, String sign, String content) { //if(activity != null && this.destination.equals(canonicalName)) this.setAction(url); key.setValue(destination); awsAccessKeyId.setValue(keyId); policy.setValue(base64Policy); signature.setValue(sign); contentType.setValue(content); this.submit(); } /** * @param node * @param uploadPopup * @return */ public static UploadPanel getInstance(PopupPanel uploadPopup, String destination, RepoContentActivity activity) { if (instance == null) instance = new S3UploadPanel(); instance.uploadPopup = uploadPopup; instance.destination.setText(destination); instance.destination.setTitle(destination); instance.path = destination; instance.setActivity(activity); instance.canonicalName = null; instance.upload.setEnabled( instance.fileUpload.getFilename() != null && instance.fileUpload.getFilename().length() > 0); instance.cancelled = true; return instance; } private void setActivity(RepoContentActivity activity) { this.activity = activity; } private String getFilename(String canonicalName) { if (canonicalName == null || canonicalName.trim().length() == 0) return null; int index = Math.max(canonicalName.lastIndexOf("/"), canonicalName.lastIndexOf("\\")); return canonicalName.substring(index + 1); } /* (non-Javadoc) * @see n3phele.client.widgets.UploadPanel#isCancelled() */ @Override public boolean isCancelled() { return this.cancelled; } }