Java Tutorial/SWT/Table Renderer
Содержание
Add ProgressBar to table cell (Column)
<source lang="java">
/*******************************************************************************
* Copyright (c) 2000, 2006 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: * IBM Corporation - initial API and implementation *******************************************************************************/
//package org.eclipse.swt.snippets; /*
* Table example snippet: Draw a bar graph * * For a list of all SWT example snippets see * http://www.eclipse.org/swt/snippets/ * * @since 3.2 */
import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.GC; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.TableItem; public class TableCellProgressBar {
public static void main(String[] args) { final Display display = new Display(); Shell shell = new Shell(display); shell.setLayout(new FillLayout()); shell.setText("Show results as a bar chart in Table"); final Table table = new Table(shell, SWT.BORDER); table.setHeaderVisible(true); table.setLinesVisible(true); TableColumn column1 = new TableColumn(table, SWT.NONE); column1.setText("Bug Status"); column1.setWidth(100); final TableColumn column2 = new TableColumn(table, SWT.NONE); column2.setText("Percent"); column2.setWidth(200); String[] labels = new String[] { "Resolved", "New", "Won"t Fix", "Invalid" }; for (int i = 0; i < labels.length; i++) { TableItem item = new TableItem(table, SWT.NONE); item.setText(labels[i]); } /* * NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly. * Therefore, it is critical for performance that these methods be as * efficient as possible. */ table.addListener(SWT.PaintItem, new Listener() { int[] percents = new int[] { 50, 30, 5, 15 }; public void handleEvent(Event event) { if (event.index == 1) { GC gc = event.gc; TableItem item = (TableItem) event.item; int index = table.indexOf(item); int percent = percents[index]; Color foreground = gc.getForeground(); Color background = gc.getBackground(); gc.setForeground(display.getSystemColor(SWT.COLOR_RED)); gc.setBackground(display.getSystemColor(SWT.COLOR_YELLOW)); int width = (column2.getWidth() - 1) * percent / 100; gc.fillGradientRectangle(event.x, event.y, width, event.height, true); Rectangle rect2 = new Rectangle(event.x, event.y, width - 1, event.height - 1); gc.drawRectangle(rect2); gc.setForeground(display.getSystemColor(SWT.COLOR_LIST_FOREGROUND)); String text = percent + "%"; Point size = event.gc.textExtent(text); int offset = Math.max(0, (event.height - size.y) / 2); gc.drawText(text, event.x + 2, event.y + offset, true); gc.setForeground(background); gc.setBackground(foreground); } } }); shell.pack(); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); }
}</source>
Draw a custom gradient selection
<source lang="java">
/*******************************************************************************
* Copyright (c) 2000, 2006 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: * IBM Corporation - initial API and implementation *******************************************************************************/
//package org.eclipse.swt.snippets; /*
* Table example snippet: Draw a custom gradient selection * * For a list of all SWT example snippets see * http://www.eclipse.org/swt/snippets/ * * @since 3.2 */
import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.GC; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.graphics.Region; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.TableItem; public class GradientSelection {
public static void main(String[] args) { final Display display = new Display(); Shell shell = new Shell(display); shell.setText("Custom gradient selection for Table"); shell.setLayout(new FillLayout()); final Table table = new Table(shell, SWT.MULTI | SWT.FULL_SELECTION); table.setHeaderVisible(true); table.setLinesVisible(true); int columnCount = 3; for (int i = 0; i < columnCount; i++) { TableColumn column = new TableColumn(table, SWT.NONE); column.setText("Column " + i); } int itemCount = 8; for (int i = 0; i < itemCount; i++) { TableItem item = new TableItem(table, SWT.NONE); item.setText(new String[] { "item " + i + " a", "item " + i + " b", "item " + i + " c" }); } /* * NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly. * Therefore, it is critical for performance that these methods be as * efficient as possible. */ table.addListener(SWT.EraseItem, new Listener() { public void handleEvent(Event event) { if ((event.detail & SWT.SELECTED) != 0) { GC gc = event.gc; Rectangle area = table.getClientArea(); /* * If you wish to paint the selection beyond the end of last column, * you must change the clipping region. */ int columnCount = table.getColumnCount(); if (event.index == columnCount - 1 || columnCount == 0) { int width = area.x + area.width - event.x; if (width > 0) { Region region = new Region(); gc.getClipping(region); region.add(event.x, event.y, width, event.height); gc.setClipping(region); region.dispose(); } } gc.setAdvanced(true); if (gc.getAdvanced()) gc.setAlpha(127); Rectangle rect = event.getBounds(); Color foreground = gc.getForeground(); Color background = gc.getBackground(); gc.setForeground(display.getSystemColor(SWT.COLOR_RED)); gc.setBackground(display.getSystemColor(SWT.COLOR_LIST_BACKGROUND)); gc.fillGradientRectangle(0, rect.y, 500, rect.height, false); // restore colors for subsequent drawing gc.setForeground(foreground); gc.setBackground(background); event.detail &= ~SWT.SELECTED; } } }); for (int i = 0; i < columnCount; i++) { table.getColumn(i).pack(); } table.setSelection(table.getItem(0)); shell.setSize(500, 200); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); }
}</source>
Make text span multiple columns
<source lang="java">
/*******************************************************************************
* Copyright (c) 2000, 2006 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: * IBM Corporation - initial API and implementation *******************************************************************************/
//package org.eclipse.swt.snippets; /*
* Table snippet: make text span multiple columns * * For a list of all SWT example snippets see * http://www.eclipse.org/swt/snippets/ * * @since 3.2 */
import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.GC; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.TableItem; public class TextSpanMultipleColumns {
public static void main(String[] args) { final Display display = new Display(); Shell shell = new Shell(display); shell.setText("Text spans two columns in a TableItem"); shell.setLayout(new FillLayout()); final Table table = new Table(shell, SWT.MULTI | SWT.FULL_SELECTION); table.setHeaderVisible(true); int columnCount = 4; for (int i = 0; i < columnCount; i++) { TableColumn column = new TableColumn(table, SWT.NONE); column.setText("Column " + i); } int itemCount = 8; for (int i = 0; i < itemCount; i++) { TableItem item = new TableItem(table, SWT.NONE); item.setText(0, "item " + i + " a"); item.setText(3, "item " + i + " d"); } /* * NOTE: MeasureItem, PaintItem and EraseItem are called repeatedly. * Therefore, it is critical for performance that these methods be as * efficient as possible. */ final String string = "text that spans two columns"; GC gc = new GC(table); final Point extent = gc.stringExtent(string); gc.dispose(); final Color red = display.getSystemColor(SWT.COLOR_RED); Listener paintListener = new Listener() { public void handleEvent(Event event) { switch (event.type) { case SWT.MeasureItem: { if (event.index == 1 || event.index == 2) { event.width = extent.x / 2; event.height = Math.max(event.height, extent.y + 2); } break; } case SWT.PaintItem: { if (event.index == 1 || event.index == 2) { int offset = 0; if (event.index == 2) { TableColumn column1 = table.getColumn(1); offset = column1.getWidth(); } event.gc.setForeground(red); int y = event.y + (event.height - extent.y) / 2; event.gc.drawString(string, event.x - offset, y); } break; } } } }; table.addListener(SWT.MeasureItem, paintListener); table.addListener(SWT.PaintItem, paintListener); for (int i = 0; i < columnCount; i++) { table.getColumn(i).pack(); } shell.pack(); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); }
}</source>
Place a progress bar in a table
<source lang="java">
/*******************************************************************************
* Copyright (c) 2000, 2004 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: * IBM Corporation - initial API and implementation *******************************************************************************/
//package org.eclipse.swt.snippets; /*
* TableEditor example snippet: place a progress bar in a table * * For a list of all SWT example snippets see * http://www.eclipse.org/swt/snippets/ */
import org.eclipse.swt.SWT; import org.eclipse.swt.custom.TableEditor; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.ProgressBar; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.TableItem; public class TableProgressBarCell {
public static void main(String[] args) { Display display = new Display(); Shell shell = new Shell(display); shell.setLayout(new FillLayout()); Table table = new Table(shell, SWT.BORDER); table.setHeaderVisible(true); table.setLinesVisible(true); for (int i = 0; i < 2; i++) { new TableColumn(table, SWT.NONE); } table.getColumn(0).setText("Task"); table.getColumn(1).setText("Progress"); for (int i = 0; i < 40; i++) { TableItem item = new TableItem(table, SWT.NONE); item.setText("Task " + i); if (i % 5 == 0) { ProgressBar bar = new ProgressBar(table, SWT.NONE); bar.setSelection(i); TableEditor editor = new TableEditor(table); editor.grabHorizontal = editor.grabVertical = true; editor.setEditor(bar, item, 1); } } table.getColumn(0).pack(); table.getColumn(1).setWidth(128); shell.pack(); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) { display.sleep(); } } display.dispose(); }
}</source>