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>
