Java tutorial
/******************************************************************************* * Copyright (c) 2006 Tom Schindl 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: * Tom Schindl - initial API and implementation * Mirko Paturzo - adding dispose functions example and defaults properties change *******************************************************************************/ package org.eclipse.nebula.snippets.grid.viewer; import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.util.ArrayList; import javax.xml.parsers.ParserConfigurationException; import javax.xml.transform.TransformerException; import org.eclipse.jface.dialogs.MessageDialog; import org.eclipse.jface.resource.FontRegistry; import org.eclipse.jface.viewers.ITableColorProvider; import org.eclipse.jface.viewers.ITableFontProvider; import org.eclipse.jface.viewers.ITableLabelProvider; import org.eclipse.jface.viewers.ITreeContentProvider; import org.eclipse.jface.viewers.LabelProvider; import org.eclipse.jface.viewers.Viewer; import org.eclipse.nebula.jface.gridviewer.GridTreeViewer; import org.eclipse.nebula.jface.gridviewer.GridViewerColumn; import org.eclipse.nebula.widgets.grid.GridColumn; import org.eclipse.nebula.widgets.grid.GridItem; import org.eclipse.nebula.widgets.grid.GridUtils; import org.eclipse.swt.SWT; import org.eclipse.swt.events.MouseAdapter; import org.eclipse.swt.events.MouseEvent; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.Font; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.layout.RowLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.FileDialog; import org.eclipse.swt.widgets.Shell; /** * A simple TreeViewer for verify dispose improvement * * @author Tom Schindl <tom.schindl@bestsolution.at> * @author Mirko Paturzo <mirko.paturzo@exeura.eu> * */ public class GridViewerSnippetDisposeTreeTest { private class MyContentProvider implements ITreeContentProvider { /* * (non-Javadoc) * * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object) */ public Object[] getElements(Object inputElement) { return ((MyModel) inputElement).child.toArray(); } /* * (non-Javadoc) * * @see org.eclipse.jface.viewers.IContentProvider#dispose() */ public void dispose() { } /* * (non-Javadoc) * * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, * java.lang.Object, java.lang.Object) */ public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { } /* * (non-Javadoc) * * @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object) */ public Object[] getChildren(Object parentElement) { return getElements(parentElement); } /* * (non-Javadoc) * * @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object) */ public Object getParent(Object element) { if (element == null) { return null; } return ((MyModel) element).parent; } /* * (non-Javadoc) * * @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object) */ public boolean hasChildren(Object element) { return ((MyModel) element).child.size() > 0; } } public class MyModel { public MyModel parent; public ArrayList child = new ArrayList(); public int counter; public MyModel(int counter, MyModel parent) { this.parent = parent; this.counter = counter; } @Override public String toString() { String rv = "Item "; if (parent != null) { rv = parent.toString() + "."; } rv += counter; return rv; } } final FontRegistry registry = new FontRegistry(); public class MyLabelProvider extends LabelProvider implements ITableLabelProvider, ITableFontProvider, ITableColorProvider { public Image getColumnImage(Object element, int columnIndex) { return null; } public String getColumnText(Object element, int columnIndex) { return "Column " + columnIndex + " => " + element.toString(); } public Font getFont(Object element, int columnIndex) { if (((MyModel) element).counter % 2 == 0) { return registry.getBold(Display.getCurrent().getSystemFont().getFontData()[0].getName()); } return null; } public Color getBackground(Object element, int columnIndex) { if (((MyModel) element).counter % 2 == 0) { return Display.getCurrent().getSystemColor(SWT.COLOR_RED); } return null; } public Color getForeground(Object element, int columnIndex) { if (((MyModel) element).counter % 2 == 1) { return Display.getCurrent().getSystemColor(SWT.COLOR_RED); } return null; } } public GridViewerSnippetDisposeTreeTest(final Shell shell) { final GridTreeViewer v = new GridTreeViewer(shell); Composite buttons = new Composite(shell, SWT.NONE); buttons.setLayout(new RowLayout()); final Button remove3 = new Button(buttons, SWT.NONE); remove3.setText("remove row with index 3"); final String restore = "restore grid"; remove3.addMouseListener(new MouseAdapter() { @Override public void mouseDown(MouseEvent e) { // button.dispose(); try { v.getGrid().remove(3); } catch (java.lang.IllegalArgumentException ie) { new MessageDialog(shell, "IndexOutOfBound error", null, "Restore the grid with button \"" + restore + "\"", MessageDialog.WARNING, new String[] { "Ok" }, 0).open(); } shell.layout(); } }); final Button add3 = new Button(buttons, SWT.NONE); add3.setText("add row with index 3"); add3.addMouseListener(new MouseAdapter() { @Override public void mouseDown(MouseEvent e) { GridItem gridItem = new GridItem(v.getGrid(), SWT.NONE, 3); gridItem.setText(0, "Added in 3"); shell.layout(); } }); final Button addColumn1 = new Button(buttons, SWT.NONE); addColumn1.setText("add column in 1"); addColumn1.addMouseListener(new MouseAdapter() { @Override public void mouseDown(MouseEvent e) { new GridColumn(v.getGrid(), SWT.NONE, 1); shell.layout(); } }); final Button removeColumn = new Button(buttons, SWT.NONE); removeColumn.setText("remove first column"); removeColumn.addMouseListener(new MouseAdapter() { @Override public void mouseDown(MouseEvent e) { // button.dispose(); try { v.getGrid().getColumn(0).dispose(); v.getGrid().redraw(); v.getGrid().layout(); } catch (java.lang.IllegalArgumentException ie) { new MessageDialog(shell, "IndexOutOfBound error", null, "Restore the grid with button \"" + restore + "\"", MessageDialog.WARNING, new String[] { "Ok" }, 0).open(); } shell.layout(); } }); final Button addColumn = new Button(buttons, SWT.NONE); addColumn.setText("add column"); addColumn.addMouseListener(new MouseAdapter() { @Override public void mouseDown(MouseEvent e) { // button.dispose(); try { createColumn(v, "Added"); } catch (java.lang.IllegalArgumentException ie) { new MessageDialog(shell, "IndexOutOfBound error", null, "Restore the grid with button \"" + restore + "\"", MessageDialog.WARNING, new String[] { "Ok" }, 0).open(); } shell.layout(); } }); Button exportGrid = new Button(buttons, SWT.NONE); exportGrid.setText("Export Grid"); exportGrid.addMouseListener(new MouseAdapter() { @Override public void mouseDown(MouseEvent e) { try { if (v.getGrid().isDisposed()) return; FileDialog fileDialog = new FileDialog(shell); fileDialog.setFilterExtensions(new String[] { "*.xml" }); String open = fileDialog.open(); if (open != null) { open = open.endsWith(".xml") ? open : open + ".xml"; FileOutputStream outputStream = new FileOutputStream(new File(open)); try { GridUtils.gridToXml(v.getGrid(), outputStream); new MessageDialog(shell, "Success", null, "Exported in " + open, MessageDialog.INFORMATION, new String[] { "Great!" }, 1).open(); } catch (ParserConfigurationException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } catch (TransformerException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } finally { try { outputStream.close(); } catch (IOException e1) { e1.printStackTrace(); } } } } catch (FileNotFoundException e1) { e1.printStackTrace(); } } }); final Button changeFont = new Button(buttons, SWT.NONE); changeFont.setText("Change Default"); changeFont.addMouseListener(new MouseAdapter() { @Override public void mouseDown(MouseEvent e) { v.getGrid().setForeground(Display.getCurrent().getSystemColor(SWT.COLOR_WHITE)); v.getGrid().setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_BLACK)); v.getGrid().setFont( registry.getItalic(Display.getCurrent().getSystemFont().getFontData()[0].getName())); shell.layout(); } }); final Button restoreButton = new Button(buttons, SWT.NONE); restoreButton.setText(restore); restoreButton.addMouseListener(new MouseAdapter() { @Override public void mouseDown(MouseEvent e) { GridColumn[] columns = v.getGrid().getColumns(); for (GridColumn gridColumn : columns) { gridColumn.dispose(); } revertGrid(v); shell.layout(); } }); revertGrid(v); } private void revertGrid(final GridTreeViewer v) { GridViewerColumn column = new GridViewerColumn(v, SWT.NONE); column.getColumn().setWidth(200); column.getColumn().setText("Column 1"); column.getColumn().setTree(true); column = new GridViewerColumn(v, SWT.NONE); column.getColumn().setWidth(200); column.getColumn().setText("Column 2"); v.setLabelProvider(new MyLabelProvider()); v.setContentProvider(new MyContentProvider()); v.setInput(createModel()); } private MyModel createModel() { MyModel root = new MyModel(0, null); root.counter = 0; MyModel tmp; for (int i = 1; i < 10; i++) { tmp = new MyModel(i, root); root.child.add(tmp); for (int j = 1; j < i; j++) { tmp.child.add(new MyModel(j, tmp)); } } return root; } public static void main(String[] args) { Display display = new Display(); Shell shell = new Shell(display); shell.setLayout(new FillLayout()); new GridViewerSnippetDisposeTreeTest(shell); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); } private static void createColumn(final GridTreeViewer v, String name) { GridColumn column = new GridColumn(v.getGrid(), SWT.NONE); column.setWidth(200); column.setText(name); } }