com.google.appinventor.client.explorer.youngandroid.AssetList.java Source code

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Here is the source code for com.google.appinventor.client.explorer.youngandroid.AssetList.java

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// -*- mode: java; c-basic-offset: 2; -*-
// Copyright 2009-2011 Google, All Rights reserved
// Copyright 2011-2012 MIT, All rights reserved
// Released under the Apache License, Version 2.0
// http://www.apache.org/licenses/LICENSE-2.0

package com.google.appinventor.client.explorer.youngandroid;

import com.google.appinventor.client.Ode;
import static com.google.appinventor.client.Ode.MESSAGES;
import com.google.appinventor.client.explorer.project.Project;
import com.google.appinventor.client.explorer.project.ProjectChangeListener;
import com.google.appinventor.client.explorer.project.ProjectNodeContextMenu;
import com.google.appinventor.client.output.OdeLog;
import com.google.appinventor.client.widgets.TextButton;
import com.google.appinventor.client.wizards.FileUploadWizard;
import com.google.appinventor.shared.rpc.project.ProjectNode;
import com.google.appinventor.shared.rpc.project.youngandroid.YoungAndroidAssetNode;
import com.google.appinventor.shared.rpc.project.youngandroid.YoungAndroidAssetsFolder;
import com.google.appinventor.shared.rpc.project.youngandroid.YoungAndroidProjectNode;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.logical.shared.SelectionEvent;
import com.google.gwt.event.logical.shared.SelectionHandler;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.SimplePanel;
import com.google.gwt.user.client.ui.Tree;
import com.google.gwt.user.client.ui.TreeItem;
import com.google.gwt.user.client.ui.VerticalPanel;

/**
 * The asset list shows all the project's assets, and lets the
 * user delete assets.
 *
 */

public class AssetList extends Composite implements ProjectChangeListener {

    // The asset "list" is represented as a tree and follows the same GWT conventions.
    private Tree assetList;
    private final VerticalPanel panel;

    private long projectId;
    private Project project;
    private YoungAndroidAssetsFolder assetsFolder;

    /**
     * Creates a new AssetList
     */
    public AssetList() {

        assetList = new Tree();
        assetList.setWidth("100%");

        panel = new VerticalPanel();
        panel.setWidth("100%");

        panel.add(assetList);

        TextButton addButton = new TextButton(MESSAGES.addButton());
        addButton.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                if (assetsFolder != null) {
                    FileUploadWizard uploader = new FileUploadWizard(assetsFolder);
                    uploader.show();
                }
            }
        });

        SimplePanel buttonPanel = new SimplePanel();
        buttonPanel.setStyleName("ode-PanelButtons");
        buttonPanel.add(addButton);

        panel.add(buttonPanel);
        panel.setCellHorizontalAlignment(buttonPanel, VerticalPanel.ALIGN_CENTER);

        initWidget(panel);

        assetList.addSelectionHandler(new SelectionHandler<TreeItem>() {
            @Override
            public void onSelection(SelectionEvent<TreeItem> event) {
                TreeItem selected = event.getSelectedItem();
                ProjectNode node = (ProjectNode) selected.getUserObject();
                // The actual menu is determined by what is registered for the filenode
                // type in CommandRegistry.java
                ProjectNodeContextMenu.show(node, selected.getWidget());
            }
        });
    }

    /*
     * Populate the asset tree with files from the project's assets folder.
     */
    private void refreshAssetList() {
        OdeLog.log("AssetList: refreshing for project " + projectId);
        assetList.clear();

        if (assetsFolder != null) {
            for (ProjectNode node : assetsFolder.getChildren()) {
                // Add the name to the tree. We need to enclose it in a span
                // because the CSS style for selection specifies a span.
                String nodeName = node.getName();
                if (nodeName.length() > 20)
                    nodeName = nodeName.substring(0, 8) + "..."
                            + nodeName.substring(nodeName.length() - 9, nodeName.length());
                TreeItem treeItem = new TreeItem(new HTML("<span>" + nodeName + "</span>"));
                // keep a pointer from the tree item back to the actual node
                treeItem.setUserObject(node);
                assetList.addItem(treeItem);
            }
        }
    }

    public void refreshAssetList(long projectId) {
        OdeLog.log("AssetList: switching projects from  " + this.projectId + " to " + projectId);

        if (project != null) {
            project.removeProjectChangeListener(this);
        }

        this.projectId = projectId;
        if (projectId != 0) {
            project = Ode.getInstance().getProjectManager().getProject(projectId);
            assetsFolder = ((YoungAndroidProjectNode) project.getRootNode()).getAssetsFolder();
            project.addProjectChangeListener(this);
        } else {
            project = null;
            assetsFolder = null;
        }

        refreshAssetList();
    }

    // ProjectChangeListener implementation
    @Override
    public void onProjectLoaded(Project project) {
        OdeLog.log("AssetList: got onProjectLoaded for " + project.getProjectId() + ", current project is "
                + projectId);
        refreshAssetList();
    }

    @Override
    public void onProjectNodeAdded(Project project, ProjectNode node) {
        OdeLog.log("AssetList: got projectNodeAdded for node " + node.getFileId() + " and project "
                + project.getProjectId() + ", current project is " + projectId);
        if (node instanceof YoungAndroidAssetNode) {
            refreshAssetList();
        }
    }

    @Override
    public void onProjectNodeRemoved(Project project, ProjectNode node) {
        OdeLog.log("AssetLIst: got onProjectNodeRemoved for node " + node.getFileId() + " and project "
                + project.getProjectId() + ", current project is " + projectId);
        if (node instanceof YoungAndroidAssetNode) {
            refreshAssetList();
        }
    }
}