Java tutorial
/* * Copyright 2009-2011 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.datatools.enablement.simpledb.editor.wizard; import java.lang.reflect.Field; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import java.util.ArrayList; import java.util.List; import org.eclipse.core.runtime.IStatus; import org.eclipse.datatools.sqltools.data.internal.core.editor.RowDataImpl; import org.eclipse.datatools.sqltools.data.internal.ui.editor.TableDataCell; import org.eclipse.datatools.sqltools.data.internal.ui.editor.TableDataEditor; import org.eclipse.jface.dialogs.IInputValidator; import org.eclipse.jface.dialogs.InputDialog; import org.eclipse.jface.viewers.StructuredSelection; import org.eclipse.jface.viewers.TableViewer; import org.eclipse.jface.window.Window; import org.eclipse.jface.wizard.WizardPage; import org.eclipse.swt.SWT; import org.eclipse.swt.events.MouseEvent; import org.eclipse.swt.events.MouseListener; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.layout.FormAttachment; import org.eclipse.swt.layout.FormData; import org.eclipse.swt.layout.FormLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.TableItem; import com.amazonaws.eclipse.datatools.enablement.simpledb.editor.Activator; import com.amazonaws.eclipse.datatools.enablement.simpledb.editor.Messages; public class SDBTableDataWizardPage extends WizardPage { private static final int INDENT = 6; private final TableDataEditor editor; private int col; private RowDataImpl rowData; private Table table; private Button edit; private Button add; private Button remove; private TableColumn tColumn; public SDBTableDataWizardPage(final TableDataEditor editor) { super(Messages.pageTitle); setTitle(Messages.pageTitle); setMessage(Messages.mainMessage); this.editor = editor; } public void createControl(final Composite parent) { Composite composite = new Composite(parent, SWT.NONE); FormLayout layout = new FormLayout(); layout.marginWidth = INDENT; layout.marginHeight = INDENT; composite.setLayout(layout); final Label l = new Label(composite, SWT.None); l.setText(Messages.labelEditAttributeValues); this.table = new Table(composite, SWT.FULL_SELECTION | SWT.HIDE_SELECTION | SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL | SWT.MULTI); this.add = new Button(composite, SWT.None); this.remove = new Button(composite, SWT.None); this.edit = new Button(composite, SWT.None); this.table.addSelectionListener(new SelectionListener() { public void widgetSelected(final SelectionEvent se) { SDBTableDataWizardPage.this.edit .setEnabled(SDBTableDataWizardPage.this.table.getSelection().length == 1); SDBTableDataWizardPage.this.remove .setEnabled(SDBTableDataWizardPage.this.table.getSelection().length > 0); } public void widgetDefaultSelected(final SelectionEvent arg0) { } }); this.table.addMouseListener(new MouseListener() { public void mouseUp(final MouseEvent arg0) { } public void mouseDown(final MouseEvent arg0) { } public void mouseDoubleClick(final MouseEvent arg0) { if (SDBTableDataWizardPage.this.table.getSelectionCount() > 0) { String newValue = getNewValue(SDBTableDataWizardPage.this.table.getSelection()[0].getText()); if (newValue != null) { SDBTableDataWizardPage.this.table.getSelection()[0].setText(newValue); SDBTableDataWizardPage.this.tColumn.pack(); } } } }); this.tColumn = new TableColumn(this.table, SWT.NONE); createContent(); this.tColumn.pack(); this.edit.addSelectionListener(new SelectionListener() { public void widgetSelected(final SelectionEvent arg0) { String newValue = getNewValue(SDBTableDataWizardPage.this.table.getSelection()[0].getText()); if (newValue != null) { SDBTableDataWizardPage.this.table.getSelection()[0].setText(newValue); SDBTableDataWizardPage.this.tColumn.pack(); } } public void widgetDefaultSelected(final SelectionEvent arg0) { } }); this.add.addSelectionListener(new SelectionListener() { public void widgetSelected(final SelectionEvent arg0) { String newValue = getNewValue(Messages.newValue); if (newValue != null) { TableItem item = createItem(newValue); SDBTableDataWizardPage.this.table.setSelection(item); SDBTableDataWizardPage.this.remove.setEnabled(true); SDBTableDataWizardPage.this.edit.setEnabled(true); SDBTableDataWizardPage.this.tColumn.pack(); } } public void widgetDefaultSelected(final SelectionEvent arg0) { } }); this.remove.addSelectionListener(new SelectionListener() { public void widgetSelected(final SelectionEvent arg0) { int[] selectionIndices = SDBTableDataWizardPage.this.table.getSelectionIndices(); SDBTableDataWizardPage.this.table.remove(selectionIndices); if (selectionIndices != null && SDBTableDataWizardPage.this.table.getItemCount() > 0) { int minSelected = Integer.MAX_VALUE; for (int i = 0; i < selectionIndices.length; i++) { if (selectionIndices[i] < minSelected) { minSelected = selectionIndices[i]; } } --minSelected; if (minSelected < 0 || minSelected == Integer.MAX_VALUE) { minSelected = 0; } try { SDBTableDataWizardPage.this.table.setSelection(minSelected); } catch (Exception e) { // just to be on the safe side e.printStackTrace(); } } SDBTableDataWizardPage.this.edit .setEnabled(SDBTableDataWizardPage.this.table.getSelection().length == 1); SDBTableDataWizardPage.this.remove .setEnabled(SDBTableDataWizardPage.this.table.getSelection().length > 0); SDBTableDataWizardPage.this.tColumn.pack(); } public void widgetDefaultSelected(final SelectionEvent arg0) { } }); FormData d = new FormData(); d.top = new FormAttachment(0, 0); d.left = new FormAttachment(0, 0); d.right = new FormAttachment(100, 0); l.setLayoutData(d); d = new FormData(); d.top = new FormAttachment(l, INDENT); d.left = new FormAttachment(0, 0); d.right = new FormAttachment(this.remove, -INDENT); d.bottom = new FormAttachment(100, 0); this.table.setLayoutData(d); this.add.setText(Messages.add); d = new FormData(); d.right = new FormAttachment(100, 0); d.top = new FormAttachment(l, INDENT); d.width = 70; this.add.setLayoutData(d); this.remove.setText(Messages.remove); d = new FormData(); d.top = new FormAttachment(this.add, 0); d.right = new FormAttachment(100, 0); d.width = 70; this.remove.setLayoutData(d); this.edit.setText(Messages.edit); d = new FormData(); d.right = new FormAttachment(100, 0); d.top = new FormAttachment(this.remove, INDENT); d.width = 70; this.edit.setLayoutData(d); setControl(composite); } private String getNewValue(final String value) { InputDialog id = new InputDialog(this.editor.getEditorSite().getShell(), Messages.dialogTitle, Messages.dialogDescription, value, new IInputValidator() { public String isValid(final String s) { if (s.getBytes().length > 1024) { return Messages.valueToLong; } return null; } }); if (id.open() == Window.OK) { return id.getValue(); } else { return null; } } protected void saveData() { TableItem[] items = this.table.getItems(); if (this.rowData != null) { if (items.length == 0) { this.rowData.updateValue(this.col, null); } else if (items.length == 1) { this.rowData.updateValue(this.col, items[0].getText()); } else { String[] s = createValue(items); this.rowData.updateValue(this.col, s); } try { Class<?> c = Class.forName(TableDataEditor.class.getCanonicalName()); Field f1 = c.getDeclaredField("tableViewer");//$NON-NLS-1$ f1.setAccessible(true); TableViewer tv = (TableViewer) f1.get(this.editor); tv.refresh(this.rowData); this.editor.getCursor().redraw(); Method m = c.getDeclaredMethod("setDirty", new Class[] { java.lang.Boolean.TYPE });//$NON-NLS-1$ m.setAccessible(true); m.invoke(this.editor, new Object[] { Boolean.TRUE }); this.editor.setDirtyBackground(this.col, this.editor.getCursor().getRow()); } catch (SecurityException e) { Activator.logMessage(e.getMessage(), e, IStatus.ERROR); } catch (ClassNotFoundException e) { Activator.logMessage(e.getMessage(), e, IStatus.ERROR); } catch (NoSuchFieldException e) { Activator.logMessage(e.getMessage(), e, IStatus.ERROR); } catch (IllegalArgumentException e) { Activator.logMessage(e.getMessage(), e, IStatus.ERROR); } catch (IllegalAccessException e) { Activator.logMessage(e.getMessage(), e, IStatus.ERROR); } catch (NoSuchMethodException e) { Activator.logMessage(e.getMessage(), e, IStatus.ERROR); } catch (InvocationTargetException e) { Activator.logMessage(e.getMessage(), e, IStatus.ERROR); } } } private String[] createValue(final TableItem[] items) { String[] s = new String[items.length]; for (int i = 0; i < items.length; i++) { TableItem it = items[i]; s[i] = it.getText(); } return s; } @SuppressWarnings("unchecked") private void createContent() { this.col = this.editor.getCursor().getColumn(); StructuredSelection selection = (StructuredSelection) this.editor.getSelectionProvider().getSelection(); TableDataCell firstElement = (TableDataCell) selection.getFirstElement(); Object value = null; if (firstElement.getRow() instanceof RowDataImpl) { this.rowData = (RowDataImpl) firstElement.getRow(); value = this.rowData.getValue(this.col); } else { //There is no rowData yet, we need to create it ourselves // ITableData tableData = this.editor.getTableData(); this.rowData = (RowDataImpl) this.editor.getOrCreateRow(); value = firstElement.getRow(); } if (value instanceof String) { createItem((String) value); } else if (value instanceof String[]) { String[] strings = (String[]) value; for (String s : strings) { createItem(s); } } else if (value instanceof ArrayList) { List<String> strings = (List<String>) value; for (String s : strings) { createItem(s); } } if (this.table.getItems().length > 0) { this.table.setSelection(0); this.remove.setEnabled(true); this.edit.setEnabled(true); } else { this.remove.setEnabled(false); this.edit.setEnabled(false); } } private TableItem createItem(final String value) { TableItem item = new TableItem(this.table, SWT.NONE); item.setText(new String[] { value }); return item; } }