Java tutorial
/******************************************************************************* * Copyright (c) 2005, 2007 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Zend and IBM - Initial implementation *******************************************************************************/ /** * */ package org2.eclipse.php.internal.debug.ui.preferences; import org.eclipse.jface.viewers.CheckboxTableViewer; import org.eclipse.jface.viewers.DoubleClickEvent; import org.eclipse.jface.viewers.IDoubleClickListener; import org.eclipse.jface.viewers.ISelectionChangedListener; import org.eclipse.jface.viewers.IStructuredContentProvider; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.ITableLabelProvider; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.SelectionChangedEvent; import org.eclipse.jface.viewers.TableLayout; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.viewers.Viewer; import org.eclipse.jface.viewers.ViewerComparator; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ControlAdapter; import org.eclipse.swt.events.ControlEvent; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Group; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableColumn; import org2.eclipse.php.internal.debug.core.debugger.AbstractDebuggerConfiguration; import org2.eclipse.php.internal.debug.core.debugger.IDebuggerConfiguration; import org2.eclipse.php.internal.debug.core.preferences.PHPDebuggersRegistry; import org2.eclipse.php.internal.debug.ui.PHPDebugUIMessages; import org2.eclipse.php.util.SWTUtil; /** * A PHP debuggers table. * * @author Shalom Gibly */ public class PHPDebuggersTable { /** * The main list control */ private TableViewer fPHPDebuggers; private Button fSettingsButton; // column weights private float fWeight1 = 3 / 5F; private float fWeight2 = 1.9F / 5F; // ignore column re-sizing when the table is being resized private boolean fResizingTable = false; /** * Creates this control inside the given control. * * @param ancestor containing control */ public void createControl(final Composite ancestor) { // Create a 'cosmetic' composite to fit the dialog style of margins. Composite comp = new Composite(ancestor, SWT.NULL); GridLayout layout = new GridLayout(); comp.setLayout(layout); GridData data = new GridData(GridData.FILL_BOTH); comp.setLayoutData(data); final Group parent = new Group(comp, SWT.NULL); parent.setText(PHPDebugUIMessages.PHPDebuggersTable_installedDebuggers); layout = new GridLayout(); layout.numColumns = 2; layout.marginHeight = 0; layout.marginWidth = 0; parent.setLayout(layout); final Font font = ancestor.getFont(); parent.setFont(font); data = new GridData(GridData.FILL_BOTH); parent.setLayoutData(data); final Table table = new Table(parent, SWT.BORDER | SWT.MULTI | SWT.FULL_SELECTION); data = new GridData(GridData.FILL_BOTH); data.heightHint = 35; table.setLayoutData(data); table.setFont(font); table.setHeaderVisible(true); table.setLinesVisible(true); final TableLayout tableLayout = new TableLayout(); table.setLayout(tableLayout); final TableColumn debuggerTypeColumn = new TableColumn(table, SWT.NULL); debuggerTypeColumn.setText(PHPDebugUIMessages.PHPDebuggersTable_debuggerType); final TableColumn debugPortColumn = new TableColumn(table, SWT.NULL); debugPortColumn.setText(PHPDebugUIMessages.PHPDebuggersTable_port); fPHPDebuggers = new CheckboxTableViewer(table); fPHPDebuggers.setLabelProvider(new PHPDebuggersLabelProvider()); fPHPDebuggers.setContentProvider(new PHPDebuggersContentProvider()); fPHPDebuggers.addSelectionChangedListener(new ISelectionChangedListener() { public void selectionChanged(final SelectionChangedEvent evt) { enableButtons(); } }); fPHPDebuggers.addDoubleClickListener(new IDoubleClickListener() { public void doubleClick(final DoubleClickEvent e) { if (!fPHPDebuggers.getSelection().isEmpty()) { editSettings(); } } }); final Composite buttons = new Composite(parent, SWT.NULL); buttons.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_BEGINNING)); layout = new GridLayout(); layout.marginHeight = 0; layout.marginWidth = 0; buttons.setLayout(layout); buttons.setFont(font); fSettingsButton = createPushButton(buttons, PHPDebugUIMessages.PHPDebuggersTable_configure); fSettingsButton.addListener(SWT.Selection, new Listener() { public void handleEvent(final Event evt) { editSettings(); } }); fPHPDebuggers.setComparator(new ViewerComparator() { public int compare(Viewer viewer, Object e1, Object e2) { if (e1 instanceof IDebuggerConfiguration && e2 instanceof IDebuggerConfiguration) { return ((IDebuggerConfiguration) e2).getName() .compareTo(((IDebuggerConfiguration) e1).getName()); } return super.compare(viewer, e1, e2); } }); configureTableResizing(parent, buttons, table, debuggerTypeColumn, debugPortColumn); fillWithWorkspaceDebuggers(); enableButtons(); Display.getDefault().asyncExec(new Runnable() { public void run() { resizeTable(parent, buttons, table, debuggerTypeColumn, debugPortColumn); } }); } /** * Set the debuggers to their default values (ports etc.) */ public void performDefaults() { AbstractDebuggerConfiguration[] debuggersConfigurations = PHPDebuggersRegistry.getDebuggersConfigurations(); if (debuggersConfigurations == null) { return; } for (AbstractDebuggerConfiguration conf : debuggersConfigurations) { conf.applyDefaults(); } fPHPDebuggers.refresh(); } private void configureTableResizing(final Composite parent, final Composite buttons, final Table table, final TableColumn debuggerTypeColumn, final TableColumn debugPortColumn) { parent.addControlListener(new ControlAdapter() { public void controlResized(final ControlEvent e) { resizeTable(parent, buttons, table, debuggerTypeColumn, debugPortColumn); } }); table.addListener(SWT.Paint, new Listener() { public void handleEvent(final Event event) { table.removeListener(SWT.Paint, this); resizeTable(parent, buttons, table, debuggerTypeColumn, debugPortColumn); } }); debuggerTypeColumn.addControlListener(new ControlAdapter() { public void controlResized(final ControlEvent e) { if (debuggerTypeColumn.getWidth() > 0 && !fResizingTable) fWeight1 = getColumnWeight(0); } }); debugPortColumn.addControlListener(new ControlAdapter() { public void controlResized(final ControlEvent e) { if (debugPortColumn.getWidth() > 0 && !fResizingTable) fWeight2 = getColumnWeight(1); } }); } private void resizeTable(final Composite parent, final Composite buttons, final Table table, final TableColumn column1, final TableColumn column2) { fResizingTable = true; int parentWidth = -1; int parentHeight = -1; if (parent.isVisible()) { final Rectangle area = parent.getClientArea(); parentWidth = area.width; parentHeight = area.height; } else { final Point parentSize = parent.computeSize(SWT.DEFAULT, SWT.DEFAULT); parentWidth = parentSize.x; parentHeight = parentSize.y; } final Point preferredSize = table.computeSize(SWT.DEFAULT, SWT.DEFAULT); int width = parentWidth - 2 * table.getBorderWidth(); if (preferredSize.y > parentHeight) { // Subtract the scrollbar width from the total column width // if a vertical scrollbar will be required final Point vBarSize = table.getVerticalBar().getSize(); width -= vBarSize.x; } width -= buttons.getSize().x; final Point oldSize = table.getSize(); if (oldSize.x > width) { // table is getting smaller so make the columns // smaller first and then resize the table to // match the client area width column1.setWidth(Math.round(width * fWeight1)); column2.setWidth(Math.round(width * fWeight2)); table.setSize(width, parentHeight); } else { // table is getting bigger so make the table // bigger first and then make the columns wider // to match the client area width table.setSize(width, parentHeight); column1.setWidth(Math.round(width * fWeight1)); column2.setWidth(Math.round(width * fWeight2)); } fResizingTable = false; } private float getColumnWeight(final int col) { final Table table = fPHPDebuggers.getTable(); final int tableWidth = table.getSize().x; final int columnWidth = table.getColumn(col).getWidth(); if (tableWidth > columnWidth) return (float) columnWidth / tableWidth; switch (col) { case 0: return 3 / 5F; case 1: return 1.9F / 5F; default: return 1.9F / 5F; } } /* * Set the debuggers input to the table. */ private void fillWithWorkspaceDebuggers() { AbstractDebuggerConfiguration[] debuggersConfigurations = PHPDebuggersRegistry.getDebuggersConfigurations(); fPHPDebuggers.setInput(debuggersConfigurations); fPHPDebuggers.refresh(); } // Enable / Disable the setting button private void enableButtons() { IStructuredSelection selection = (IStructuredSelection) fPHPDebuggers.getSelection(); fSettingsButton.setEnabled(selection.size() == 1); } /** * Creates a push button. * * @param parent * @param label * @return */ protected Button createPushButton(final Composite parent, final String label) { return SWTUtil.createPushButton(parent, label, null); } /* * Edit the settings for the selected PHP debugger. */ private void editSettings() { final IStructuredSelection selection = (IStructuredSelection) fPHPDebuggers.getSelection(); final AbstractDebuggerConfiguration phpDebuggerConfiguration = (AbstractDebuggerConfiguration) selection .getFirstElement(); if (phpDebuggerConfiguration == null) { return; } // Open the edit dialog after creating it's content by calling the AbstractDebuggerConfiguration#openConfigurationDialog phpDebuggerConfiguration.openConfigurationDialog(Display.getDefault().getActiveShell()); fPHPDebuggers.refresh(phpDebuggerConfiguration); commitChanges(); } /* * Save the changes to the preferences. */ protected void commitChanges() { // TODO - Save the changes to the preferences (if needed). } /** * Content provider to show a list of PHP debuggers */ class PHPDebuggersContentProvider implements IStructuredContentProvider { public void dispose() { } public Object[] getElements(final Object input) { return PHPDebuggersRegistry.getDebuggersConfigurations(); } public void inputChanged(final Viewer viewer, final Object oldInput, final Object newInput) { } } /** * Label provider for installed PHPs table. */ class PHPDebuggersLabelProvider extends LabelProvider implements ITableLabelProvider { /** * @see ITableLabelProvider#getColumnImage(Object, int) */ public Image getColumnImage(final Object element, final int columnIndex) { return null; } /** * @see ITableLabelProvider#getColumnText(Object, int) */ public String getColumnText(final Object element, final int columnIndex) { if (element instanceof IDebuggerConfiguration) { IDebuggerConfiguration configuration = (IDebuggerConfiguration) element; switch (columnIndex) { case 0: return configuration.getName(); case 1: int port = configuration.getPort(); if (port < 0) { return PHPDebugUIMessages.PHPDebuggersTable_notDefined; } return String.valueOf(port); } } return element.toString(); } } }