Java tutorial
/******************************************************************************* * Copyright (c) 2010 Ericsson. * 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: * Ericsson - Initial API and implementation *******************************************************************************/ package org.eclipse.cdt.dsf.gdb.internal.ui.tracepoints; import java.text.Collator; import java.util.Locale; import org.eclipse.cdt.dsf.gdb.internal.ui.GdbUIPlugin; import org.eclipse.cdt.dsf.gdb.internal.ui.tracepoints.TraceControlView.FailedTraceVariableCreationException; import org.eclipse.cdt.dsf.gdb.service.IGDBTraceControl.ITraceVariableDMData; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.swt.SWT; import org.eclipse.swt.events.DisposeEvent; import org.eclipse.swt.events.DisposeListener; import org.eclipse.swt.events.FocusEvent; import org.eclipse.swt.events.FocusListener; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.graphics.Image; 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.Control; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.TableItem; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.plugin.AbstractUIPlugin; public final class TraceVarDetailsDialog extends Dialog { private Button createButton = null; private Button refreshButton = null; private Table table = null; private TraceControlView fView = null; private Text nameInput = null; private Text valueInput = null; private Image warningImage = null; private Label warningIconLabel = null; private Label warningTextLabel = null; public TraceVarDetailsDialog(Shell shell, TraceControlView view) { super(shell); setShellStyle(getShellStyle() | SWT.RESIZE | SWT.MAX); fView = view; } @Override protected Control createDialogArea(Composite parent) { getShell().setText(TracepointsMessages.TraceControlView_trace_variable_details_dialog_title); Composite composite = new Composite(parent, SWT.NONE); GridLayout gridLayout = new GridLayout(1, false); composite.setLayout(gridLayout); composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); // Create the table to show the existing variables and their values Composite tableComposite = new Composite(composite, SWT.NONE); gridLayout = new GridLayout(1, false); tableComposite.setLayout(gridLayout); tableComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true)); table = new Table(tableComposite, SWT.BORDER | SWT.HIDE_SELECTION); final GridData gridData = new GridData(SWT.FILL, SWT.FILL, true, true); gridData.heightHint = 6 * table.getItemHeight(); table.setLayoutData(gridData); table.setLinesVisible(true); table.setHeaderVisible(true); final TableColumn nameTableColumn = new TableColumn(table, SWT.NONE); nameTableColumn.setWidth(150); nameTableColumn.setText(TracepointsMessages.TraceControlView_trace_variable_details_column_name); nameTableColumn.setAlignment(SWT.LEFT); final TableColumn initValTableColumn = new TableColumn(table, SWT.NONE); initValTableColumn.setWidth(120); initValTableColumn.setText(TracepointsMessages.TraceControlView_trace_variable_details_column_init_value); initValTableColumn.setAlignment(SWT.RIGHT); final TableColumn currentValTableColumn = new TableColumn(table, SWT.NONE); currentValTableColumn.setWidth(120); currentValTableColumn .setText(TracepointsMessages.TraceControlView_trace_variable_details_column_curr_value); currentValTableColumn.setAlignment(SWT.RIGHT); refreshButton = new Button(tableComposite, SWT.NONE); refreshButton.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, true, false, 2, 1)); refreshButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { handleRefresh(); } }); refreshButton.setText(TracepointsMessages.TraceControlView_trace_variable_details_refresh_button); refreshButton.setEnabled(true); Label separator = new Label(composite, SWT.SEPARATOR | SWT.HORIZONTAL); separator.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); // Create the section to create a new variable Composite createComposite = new Composite(composite, SWT.NONE); gridLayout = new GridLayout(1, false); createComposite.setLayout(gridLayout); createComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false)); // Now a composite just for the input Composite inputComposite = new Composite(createComposite, SWT.NONE); gridLayout = new GridLayout(2, false); gridLayout.marginWidth = 0; gridLayout.marginHeight = 0; inputComposite.setLayout(gridLayout); inputComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false)); Label nameLabel = new Label(inputComposite, SWT.NONE); nameLabel.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false)); nameLabel.setText(TracepointsMessages.TraceControlView_trace_variable_details_name_label); nameInput = new Text(inputComposite, SWT.BORDER); nameInput.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); Label valueLabel = new Label(inputComposite, SWT.NONE); valueLabel.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false)); valueLabel.setText(TracepointsMessages.TraceControlView_trace_variable_details_value_label); valueInput = new Text(inputComposite, SWT.BORDER); valueInput.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); // And a composite for the create button and its warning icon and text Composite createButtonComposite = new Composite(createComposite, SWT.NONE); gridLayout = new GridLayout(3, false); gridLayout.marginWidth = 0; gridLayout.marginHeight = 0; createButtonComposite.setLayout(gridLayout); createButtonComposite.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); createButton = new Button(createButtonComposite, SWT.NONE); createButton.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false)); createButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { handleCreate(); } }); createButton.setText(TracepointsMessages.TraceControlView_trace_variable_details_create_button); createButton.setEnabled(true); warningIconLabel = new Label(createButtonComposite, SWT.NONE); warningIconLabel.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, false, false)); warningImage = AbstractUIPlugin .imageDescriptorFromPlugin(GdbUIPlugin.PLUGIN_ID, "icons/full/obj16/warning.gif").createImage(); //$NON-NLS-1$ warningIconLabel.setImage(warningImage); warningIconLabel.setVisible(false); warningTextLabel = new Label(createButtonComposite, SWT.NONE); warningTextLabel.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false)); parent.addDisposeListener(new DisposeListener() { @Override public void widgetDisposed(DisposeEvent e) { if (warningImage != null) warningImage.dispose(); } }); // When the user goes into either input field, then pressing return // should try to create the command FocusListener clearWarningFocusListener = new FocusListener() { @Override public void focusGained(FocusEvent e) { getShell().setDefaultButton(createButton); } @Override public void focusLost(FocusEvent e) { } }; nameInput.addFocusListener(clearWarningFocusListener); valueInput.addFocusListener(clearWarningFocusListener); // When the user modifies any entry in the input, we should clear any warning ModifyListener clearWarningListener = new ModifyListener() { @Override public void modifyText(ModifyEvent e) { setWarningVisible(false); } }; nameInput.addModifyListener(clearWarningListener); valueInput.addModifyListener(clearWarningListener); resetInputFields(); handleRefresh(); return composite; } /** * Set the visibility of the warning. Should be set to true when there * is a problem creating the specific variable; false otherwise * * @param visible * True for visible, false for hidden. */ public void setWarningVisible(boolean visible) { if (warningIconLabel == null) return; warningIconLabel.setVisible(visible); if (visible == false) { if (warningTextLabel != null) { warningTextLabel.setText(""); //$NON-NLS-1$ } } } /** * Set the visibility of the warning icon to true and set its * text to the parameter message. */ public void setWarningVisible(String message) { if (warningIconLabel == null || warningTextLabel == null) return; warningTextLabel.setText(message); warningIconLabel.setVisible(true); nameInput.setFocus(); } @Override protected void createButtonsForButtonBar(Composite parent) { // create Close button only createButton(parent, IDialogConstants.CLOSE_ID, IDialogConstants.CLOSE_LABEL, true); } @Override protected void buttonPressed(int buttonId) { if (IDialogConstants.CLOSE_ID == buttonId) { close(); } } protected void handleRefresh() { ITraceVariableDMData[] vars = fView.getTraceVarList(); if (vars == null) { setWarningVisible(TracepointsMessages.TraceControlView_refresh_variable_error); createButton.setEnabled(false); return; } // Remove the warning and re-enable the create button, since we now // have a list of trace variables. setWarningVisible(false); createButton.setEnabled(true); table.removeAll(); for (ITraceVariableDMData var : vars) { String currentVal = var.getValue(); if (currentVal == null) { currentVal = ""; //$NON-NLS-1$ } addTableItem(var.getName(), var.getInitialValue(), currentVal); } } private void addTableItem(String name, String initVal, String currentVal) { // Find where to insert the new element int index = -1; TableItem[] items = table.getItems(); Collator collator = Collator.getInstance(Locale.getDefault()); for (int i = 0; i < items.length; i++) { String rowName = items[i].getText(0); if (collator.compare(name, rowName) < 0) { index = i; break; } } if (index == -1) { index = items.length; } TableItem tableItem = new TableItem(table, SWT.NONE, index); tableItem.setText(0, name); tableItem.setText(1, initVal); tableItem.setText(2, currentVal); } protected void resetInputFields() { nameInput.setText(""); //$NON-NLS-1$ valueInput.setText("0"); //$NON-NLS-1$ } protected void handleCreate() { String name = nameInput.getText(); if (name != null && name.length() > 0) { String value = valueInput.getText(); if (value != null && value.length() == 0) { value = null; // No value specified } try { fView.createVariable(name, value); resetInputFields(); nameInput.setFocus(); handleRefresh(); } catch (FailedTraceVariableCreationException e) { setWarningVisible(e.getMessage()); } } else { setWarningVisible(TracepointsMessages.TraceControlView_create_variable_empty_name_error); } } }