Java tutorial
/** * Copyright 2008-2015 Qualogy Solutions B.V. * * 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.qualogy.qafe.gwt.client.ui.renderer; import java.util.Iterator; import com.google.gwt.core.client.GWT; import com.google.gwt.dom.client.InputElement; 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.client.DOM; import com.google.gwt.user.client.Element; import com.google.gwt.user.client.Event; 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.FormPanel; import com.google.gwt.user.client.ui.Grid; import com.google.gwt.user.client.ui.HasWidgets; import com.google.gwt.user.client.ui.Hidden; import com.google.gwt.user.client.ui.HorizontalPanel; import com.google.gwt.user.client.ui.Hyperlink; import com.google.gwt.user.client.ui.Label; import com.google.gwt.user.client.ui.UIObject; import com.google.gwt.user.client.ui.Widget; import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteEvent; import com.google.gwt.user.client.ui.FormPanel.SubmitCompleteHandler; import com.qualogy.qafe.gwt.client.context.ClientApplicationContext; import com.qualogy.qafe.gwt.client.factory.MainFactoryActions; import com.qualogy.qafe.gwt.client.ui.renderer.events.CallbackHandler; import com.qualogy.qafe.gwt.client.vo.ui.ComponentGVO; import com.qualogy.qafe.gwt.client.vo.ui.FileUploadGVO; public class FileUploadRenderer extends AbstractComponentRenderer { public UIObject render(ComponentGVO component, String uuid, String parent, String context) { HorizontalPanel uiObject = null; final String finalParent = parent; if (component != null) { if (component instanceof FileUploadGVO) { if (component.getMenu() != null) { final ComponentGVO finalComponentGVO = component; final String finalUuid = uuid; uiObject = new HorizontalPanel() { @Override public void onBrowserEvent(Event event) { if (event.getTypeInt() == Event.ONCONTEXTMENU) { DOM.eventPreventDefault(event); applyContextMenu(event, finalComponentGVO, finalUuid, finalParent); } super.onBrowserEvent(event); } @Override protected void setElement(Element elem) { super.setElement(elem); sinkEvents(Event.ONCONTEXTMENU); } }; } else { uiObject = new HorizontalPanel(); } final FormPanel formPanel = new FormPanel(); formPanel.setAction(GWT.getModuleBaseURL() + "/rpc.upload"); formPanel.setEncoding(FormPanel.ENCODING_MULTIPART); formPanel.setMethod(FormPanel.METHOD_POST); final Button uploadButtonComponent = new Button("Upload"); uploadButtonComponent.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { formPanel.submit(); } }); final FileUpload fileUploadComponent = new FileUpload(); fileUploadComponent.setName("uploadElement"); fileUploadComponent.addChangeHandler(new ChangeHandler() { public void onChange(ChangeEvent event) { String filename = fileUploadComponent.getFilename(); boolean enabled = (filename != null) && (filename.length() > 0); uploadButtonComponent.setEnabled(enabled); } }); Hidden appId = new Hidden(); final String appID = ClientApplicationContext.getInstance().getWindowSession(); appId.setName("APPUUID=" + appID); Hidden windowId = new Hidden(); windowId.setName("WINDOWID=" + parent); Grid gridPanel = new Grid(2, 4); gridPanel.setWidget(0, 0, fileUploadComponent); gridPanel.setWidget(0, 1, uploadButtonComponent); gridPanel.setWidget(0, 2, appId); gridPanel.setWidget(0, 3, windowId); formPanel.add(gridPanel); RendererHelper.fillIn(component, formPanel, uuid, parent, context); formPanel.addSubmitCompleteHandler(new SubmitCompleteHandler() { public void onSubmitComplete(SubmitCompleteEvent event) { String uuId = event.getResults(); boolean success = false; if (uuId != null && uuId.indexOf("=") > 0) { uuId = uuId.substring(uuId.indexOf("=") + 1); success = true; } if (formPanel instanceof HasWidgets) { HasWidgets hasWidgets = (HasWidgets) formPanel; Iterator<Widget> itr = hasWidgets.iterator(); while (itr.hasNext()) { Widget widget = itr.next(); if (widget instanceof Grid) { Grid gridPanel = (Grid) widget; final FileUpload fileUpload = (FileUpload) gridPanel.getWidget(0, 0); final Button uploadButton = (Button) gridPanel.getWidget(0, 1); if (success) { fileUpload.setVisible(false); uploadButton.setVisible(false); String fileName = event.getResults().substring(0, event.getResults().indexOf("#")); final String viewUrl = GWT.getModuleBaseURL() + "/rpc.view?APPUUID=" + appID + "&WINDOWID=" + finalParent + "&VIEW=" + uuId; final Label fileNameLabel = new Label(fileName); DOM.setStyleAttribute(fileNameLabel.getElement(), "textDecoration", "underline"); DOM.setStyleAttribute(fileNameLabel.getElement(), "cursor", "hand"); fileNameLabel.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { Window.open(viewUrl, "UploadedFile", null); } }); fileNameLabel.setVisible(true); final Label clearLabel = new Label("Clear"); clearLabel.setVisible(true); final String finalUuId = uuId; DOM.setStyleAttribute(clearLabel.getElement(), "textDecoration", "underline"); DOM.setStyleAttribute(clearLabel.getElement(), "cursor", "hand"); clearLabel.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { MainFactoryActions.removeUploadedFile(appID, finalParent, finalUuId); DOM.setElementAttribute(fileUpload.getElement(), "fu-uuid", ""); fileNameLabel.setVisible(false); clearLabel.setVisible(false); fileUpload.setVisible(true); uploadButton.setVisible(true); init(fileUpload, uploadButton); } }); gridPanel.setWidget(1, 0, fileNameLabel); gridPanel.setWidget(1, 1, clearLabel); DOM.setElementAttribute(fileUpload.getElement(), "fu-uuid", uuId); CallbackHandler.createCallBack(formPanel, "onfinish", null, null); } else { Hyperlink fileNameLabel = (Hyperlink) gridPanel.getWidget(1, 0); fileNameLabel.setText("Uploading unsuccessfull."); fileNameLabel.setVisible(true); } } } } } }); uiObject.add(formPanel); init(fileUploadComponent, uploadButtonComponent); } } return uiObject; } private void init(FileUpload fileUpload, Button uploadButton) { if (fileUpload != null) { ((InputElement) fileUpload.getElement().cast()).setValue(""); } if (uploadButton != null) { uploadButton.setEnabled(false); } } }