Java tutorial
/* * Copyright 2011-2012 Amazon Technologies, Inc. * * 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://aws.amazon.com/apache2.0 * * This file 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.amazonaws.eclipse.codedeploy.explorer.editor.table; import org.eclipse.jface.layout.TreeColumnLayout; import org.eclipse.jface.resource.JFaceResources; import org.eclipse.jface.viewers.ColumnPixelData; import org.eclipse.jface.viewers.ColumnWeightData; import org.eclipse.jface.viewers.TreePath; import org.eclipse.jface.viewers.TreeViewer; import org.eclipse.swt.SWT; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Tree; import org.eclipse.swt.widgets.TreeColumn; import org.eclipse.ui.forms.IFormColors; import org.eclipse.ui.forms.widgets.FormToolkit; import com.amazonaws.eclipse.codedeploy.explorer.editor.DeploymentGroupEditorInput; /** * S3 object listing with virtual directory support. */ public class DeploymentsTableView extends Composite { static final int DEPLOYMENT_ID_COL = 0; static final int INSTANCE_ID_COL = 1; static final int LIFECYCLE_EVENT_COL = 2; static final int STATUS_COL = 3; static final int START_TIME_COL = 4; static final int END_TIME_COL = 5; static final int REVISION_LOCATION_COL = 6; static final int LOGS_COL = 7; private final TreeViewer viewer; private final DeploymentsTableViewTreePathContentCache contentCache; private final LoadingContentProvider loadingContentProvider; private Label tableTitleLabel; public DeploymentsTableView(DeploymentGroupEditorInput editorInput, Composite composite, FormToolkit toolkit, int style) { super(composite, style); contentCache = new DeploymentsTableViewTreePathContentCache(editorInput); loadingContentProvider = new LoadingContentProvider(); viewer = createControls(toolkit); } private TreeViewer createControls(FormToolkit toolkit) { GridLayout gridLayout = new GridLayout(1, false); gridLayout.marginWidth = 0; gridLayout.marginHeight = 0; setLayout(gridLayout); Composite sectionComp = toolkit.createComposite(this, SWT.None); sectionComp.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); sectionComp.setLayout(new GridLayout(1, false)); Composite headingComp = toolkit.createComposite(sectionComp, SWT.None); headingComp.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false, 1, 1)); headingComp.setLayout(new GridLayout()); tableTitleLabel = toolkit.createLabel(headingComp, "Deployments"); tableTitleLabel.setFont(JFaceResources.getHeaderFont()); tableTitleLabel.setForeground(toolkit.getColors().getColor(IFormColors.TITLE)); Composite tableHolder = toolkit.createComposite(sectionComp, SWT.None); tableHolder.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 1, 1)); FillLayout layout = new FillLayout(); layout.marginHeight = 0; layout.marginWidth = 10; layout.type = SWT.VERTICAL; tableHolder.setLayout(layout); Composite tableComp = toolkit.createComposite(tableHolder, SWT.None); final TreeColumnLayout tableColumnLayout = new TreeColumnLayout(); tableComp.setLayout(tableColumnLayout); final TreeViewer viewer = new TreeViewer(tableComp, SWT.BORDER | SWT.VIRTUAL | SWT.MULTI | SWT.H_SCROLL); viewer.getTree().setLinesVisible(true); viewer.getTree().setHeaderVisible(true); viewer.setUseHashlookup(true); viewer.setLabelProvider(new DeploymentsTableViewLabelProvider()); viewer.setContentProvider(new DeploymentsTableViewContentProvider(this.viewer, this.contentCache)); Tree tree = viewer.getTree(); createColumns(tableColumnLayout, tree); viewer.setInput(loadingContentProvider); updateRefreshProgress(0, false); // Async load top-level data new Thread(new Runnable() { public void run() { Display.getDefault().syncExec(new Runnable() { public void run() { // Preserve the current column widths int[] colWidth = new int[viewer.getTree().getColumns().length]; int i = 0; for (TreeColumn col : viewer.getTree().getColumns()) { colWidth[i++] = col.getWidth(); } i = 0; for (TreeColumn col : viewer.getTree().getColumns()) { tableColumnLayout.setColumnData(col, new ColumnPixelData(colWidth[i])); } } }); // Cache the children of all the top-level elements before // updating the tree view loadAllTopLevelElements(); Display.getDefault().syncExec(new Runnable() { public void run() { viewer.setInput(contentCache); } }); } }).start(); return viewer; } private void createColumns(TreeColumnLayout tableColumnLayout, Tree tree) { TreeColumn column = new TreeColumn(tree, SWT.NONE); column.setText("Deployment ID"); ColumnWeightData cwd_column = new ColumnWeightData(10); cwd_column.minimumWidth = 1; tableColumnLayout.setColumnData(column, cwd_column); TreeColumn column_1 = new TreeColumn(tree, SWT.NONE); column_1.setText("EC2 Instance"); tableColumnLayout.setColumnData(column_1, new ColumnWeightData(10)); TreeColumn column_2 = new TreeColumn(tree, SWT.NONE); column_2.setText("Lifecycle Event"); tableColumnLayout.setColumnData(column_2, new ColumnWeightData(8)); TreeColumn column_3 = new TreeColumn(tree, SWT.NONE); column_3.setText("Status"); tableColumnLayout.setColumnData(column_3, new ColumnWeightData(6)); TreeColumn column_4 = new TreeColumn(tree, SWT.NONE); column_4.setText("Start Time"); tableColumnLayout.setColumnData(column_4, new ColumnWeightData(12)); TreeColumn column_5 = new TreeColumn(tree, SWT.NONE); column_5.setText("End Time"); tableColumnLayout.setColumnData(column_5, new ColumnWeightData(12)); TreeColumn column_6 = new TreeColumn(tree, SWT.NONE); column_6.setText("Revision"); tableColumnLayout.setColumnData(column_6, new ColumnWeightData(20)); TreeColumn column_7 = new TreeColumn(tree, SWT.NONE); column_7.setText("Logs"); tableColumnLayout.setColumnData(column_7, new ColumnWeightData(15)); } private volatile boolean isRefreshing = false; public void refreshAsync() { if (isRefreshing) { return; } new Thread(new Runnable() { public void run() { isRefreshing = true; updateRefreshProgress(0, true); // Cache the children of all the top-level elements before // updating the tree view contentCache.refresh(); loadAllTopLevelElements(); Display.getDefault().syncExec(new Runnable() { public void run() { viewer.setInput(contentCache); } }); isRefreshing = false; } }).start(); } private void loadAllTopLevelElements() { Object[] topLevelElements = contentCache.getChildren(new TreePath(new Object[0])); int progressPerElement = 100 / (topLevelElements.length + 1); int loadedElements = 1; updateRefreshProgress(loadedElements++ * progressPerElement, true); for (Object topLevelElement : topLevelElements) { contentCache.getChildren(new TreePath(new Object[] { topLevelElement })); updateRefreshProgress(loadedElements++ * progressPerElement, true); } Display.getDefault().syncExec(new Runnable() { public void run() { tableTitleLabel.setText("Deployments"); tableTitleLabel.pack(); } }); } private void updateRefreshProgress(final int progress, boolean inDisplayThread) { if (inDisplayThread) { Display.getDefault().syncExec(new Runnable() { public void run() { updateRefreshProgress(progress, false); } }); } else { tableTitleLabel.setText(String.format("Deployments (loading... %d%%)", Math.min(100, progress))); tableTitleLabel.pack(); } } }