root / src / gr / ebs / gss / client / CellTreeView.java @ b2b07869
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/*
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* Copyright 2011 Electronic Business Systems Ltd.
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*
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* This file is part of GSS.
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*
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* GSS is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GSS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GSS. If not, see <http://www.gnu.org/licenses/>.
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*/
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package gr.ebs.gss.client; |
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import gr.ebs.gss.client.rest.GetCommand; |
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import gr.ebs.gss.client.rest.resource.FolderResource; |
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import gr.ebs.gss.client.rest.resource.FolderResource; |
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import gr.ebs.gss.client.rest.resource.UserResource; |
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import java.util.Arrays; |
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import com.google.gwt.cell.client.AbstractCell; |
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import com.google.gwt.cell.client.Cell; |
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import com.google.gwt.core.client.GWT; |
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import com.google.gwt.resources.client.ClientBundle; |
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import com.google.gwt.resources.client.ImageResource; |
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import com.google.gwt.safehtml.shared.SafeHtmlBuilder; |
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import com.google.gwt.user.cellview.client.CellTree; |
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import com.google.gwt.user.cellview.client.TreeNode; |
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import com.google.gwt.user.cellview.client.HasKeyboardSelectionPolicy.KeyboardSelectionPolicy; |
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import com.google.gwt.user.client.DeferredCommand; |
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import com.google.gwt.user.client.IncrementalCommand; |
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import com.google.gwt.user.client.ui.Composite; |
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import com.google.gwt.user.client.ui.Tree; |
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import com.google.gwt.view.client.AsyncDataProvider; |
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import com.google.gwt.view.client.HasData; |
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import com.google.gwt.view.client.ListDataProvider; |
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import com.google.gwt.view.client.Range; |
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import com.google.gwt.view.client.SingleSelectionModel; |
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import com.google.gwt.view.client.TreeViewModel; |
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import com.google.gwt.view.client.TreeViewModel.DefaultNodeInfo; |
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/**
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* @author kman
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*
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*/
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public class CellTreeView extends Composite{ |
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public static final boolean DONE = false; |
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Images images; |
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private final ListDataProvider<FolderResource> rootNodes = new ListDataProvider<FolderResource>(); |
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SingleSelectionModel<FolderResource> selectionModel = new SingleSelectionModel<FolderResource>(); |
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/**
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* Specifies the images that will be bundled for this Composite and other
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* inherited images that will be included in the same bundle.
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*/
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public interface Images extends ClientBundle, Tree.Resources, FolderContextMenu.Images { |
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@Source("gr/ebs/gss/resources/folder_home.png") |
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ImageResource home(); |
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@Source("gr/ebs/gss/resources/folder_yellow.png") |
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ImageResource folderYellow(); |
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@Source("gr/ebs/gss/resources/mimetypes/document.png") |
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ImageResource document(); |
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@Source("gr/ebs/gss/resources/internet.png") |
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ImageResource othersShared(); |
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@Source("gr/ebs/gss/resources/edit_user.png") |
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ImageResource myShared(); |
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@Source("gr/ebs/gss/resources/folder_user.png") |
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ImageResource sharedFolder(); |
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@Source("gr/ebs/gss/resources/trashcan_empty.png") |
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ImageResource trash(); |
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} |
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/**
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*
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*/
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public CellTreeView(final Images _images) { |
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images = _images; |
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TreeViewModel model = new CustomTreeModel();
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/*
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* Create the tree using the model. We use <code>null</code> as the default
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* value of the root node. The default value will be passed to
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* CustomTreeModel#getNodeInfo();
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*/
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CellTree tree = new CellTree(model, null); |
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tree.setKeyboardSelectionPolicy(KeyboardSelectionPolicy.ENABLED); |
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initWidget(tree); |
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DeferredCommand.addCommand(new IncrementalCommand() {
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@Override
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public boolean execute() { |
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return fetchRootFolders();
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} |
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}); |
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} |
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public boolean fetchRootFolders() { |
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UserResource userResource = GSS.get().getCurrentUserResource(); |
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if (userResource == null) |
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return !DONE;
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final String path = userResource.getFilesPath(); |
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GetCommand<FolderResource> gf = new GetCommand<FolderResource>(FolderResource.class, path, null) { |
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@Override
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public void onComplete() { |
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FolderResource rootResource = getResult(); |
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rootNodes.setList(Arrays.asList((FolderResource)rootResource));
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} |
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@Override
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public void onError(Throwable t) { |
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GWT.log("Error fetching root folder", t);
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GSS.get().displayError("Unable to fetch root folder");
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} |
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}; |
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DeferredCommand.addCommand(gf); |
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return DONE;
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} |
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public Images getImages() {
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return images;
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} |
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class CustomTreeModel implements TreeViewModel{ |
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private final Cell<FolderResource> departmentCell = new AbstractCell<FolderResource>(){ |
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@Override
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public void render(com.google.gwt.cell.client.Cell.Context arg0, FolderResource arg1, SafeHtmlBuilder arg2) { |
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arg2.appendEscaped(arg1.getName()); |
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} |
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}; |
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@Override
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public <T> NodeInfo<?> getNodeInfo(T value) {
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if(value==null){ |
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return new DefaultNodeInfo<FolderResource>(rootNodes, departmentCell, |
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selectionModel, null);
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} |
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else if (value instanceof FolderResource) { |
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// Second level.
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FolderDataProvider dataProvider = new FolderDataProvider(
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((FolderResource) value).getUri()); |
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return new DefaultNodeInfo<FolderResource>(dataProvider, departmentCell, |
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selectionModel, null);
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} |
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// TODO Auto-generated method stub
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return null; |
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} |
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@Override
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public boolean isLeaf(Object value) { |
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/*if(value instanceof FolderResource)
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return ((FolderResource)value).getFolders().size()==0;*/
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return false; |
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} |
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} |
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class FolderDataProvider extends AsyncDataProvider<FolderResource>{ |
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private final String department; |
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public FolderDataProvider(String department) { |
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super(null); |
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this.department = department;
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} |
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/*@Override
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public void addDataDisplay(HasData<FolderResource> display) {
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super.addDataDisplay(display);
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// Request the count anytime a view is added.
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requestFactory.employeeRequest().countEmployeesByDepartment(department).fire(
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new Receiver<Long>() {
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@Override
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public void onSuccess(Long response) {
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updateRowCount(response.intValue(), true);
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}
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});
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}*/
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@Override
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protected void onRangeChanged(final HasData<FolderResource> view) { |
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Range range = view.getVisibleRange(); |
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GetCommand<FolderResource> gf = new GetCommand<FolderResource>(FolderResource.class, department, null) { |
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@Override
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public void onComplete() { |
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FolderResource rootResource = getResult(); |
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if(rootResource.getFolders().size()!=0){ |
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updateRowCount(rootResource.getFolders().size(), true);
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updateRowData(0,rootResource.getFolders());
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} |
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else{
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updateRowCount(rootResource.getFolders().size(), true);
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updateRowData(0,rootResource.getFolders());
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removeDataDisplay(view); |
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} |
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} |
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@Override
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public void onError(Throwable t) { |
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GWT.log("Error fetching root folder", t);
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GSS.get().displayError("Unable to fetch root folder");
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} |
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}; |
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DeferredCommand.addCommand(gf); |
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} |
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} |
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} |