Java Tutorial/SWT/TableItem
Содержание
- 1 Add Icon to all table cells
- 2 Adding Image to Table Column
- 3 Adding Rows
- 4 Draw different foreground colors and fonts for text in a TableItem
- 5 Enlarge Table Cell
- 6 Multiline Table cell
- 7 Set Cell Background color
- 8 Set Cell Foreground
- 9 Set Table Background and TableItem Foreground
- 10 Set TableItem Background
- 11 Update table item text
Add Icon to all table cells
/*******************************************************************************
* 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: Images on the right hand side of a TableItem
*
* 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.Image;
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 TableCellIconAdd {
public static void main(String[] args) {
Display display = new Display();
final Image image = display.getSystemImage(SWT.ICON_INFORMATION);
Shell shell = new Shell(display);
shell.setText("Images on the right side of the TableItem");
shell.setLayout(new FillLayout());
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.
*/
Listener paintListener = new Listener() {
public void handleEvent(Event event) {
switch (event.type) {
case SWT.MeasureItem: {
Rectangle rect = image.getBounds();
event.width += rect.width;
event.height = Math.max(event.height, rect.height + 2);
break;
}
case SWT.PaintItem: {
int x = event.x + event.width;
Rectangle rect = image.getBounds();
int offset = Math.max(0, (event.height - rect.height) / 2);
event.gc.drawImage(image, x, event.y + offset);
break;
}
}
}
};
table.addListener(SWT.MeasureItem, paintListener);
table.addListener(SWT.PaintItem, paintListener);
for (int i = 0; i < columnCount; i++) {
table.getColumn(i).pack();
}
shell.setSize(500, 200);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
if (image != null)
image.dispose();
display.dispose();
}
}
Adding Image to Table Column
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
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 TableColumnImageAdding {
public static void main(String[] args) {
final Display display = new Display();
Image checkedImage = new Image(display,"yourFile.gif");
Image uncheckedImage = new Image(display,"yourFile.gif");
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
final Table table = new Table(shell, SWT.BORDER);
TableColumn column1 = new TableColumn(table, SWT.NONE);
TableColumn column2 = new TableColumn(table, SWT.NONE);
TableColumn column3 = new TableColumn(table, SWT.NONE);
TableItem item1 = new TableItem(table, SWT.NONE);
item1.setText(new String[] { "first item", "Image 1", "Image 2" });
item1.setImage(1, uncheckedImage);
item1.setImage(2, uncheckedImage);
column1.pack();
column2.pack();
column3.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
checkedImage.dispose();
uncheckedImage.dispose();
display.dispose();
}
}
Adding Rows
The TableItem class represents rows in the table. The parent of a TableItem is the containing Table.
Its constructor:
TableItem(Table parent, int style)
TableItem(Table parent, int style, int index)
- Using the second constructor inserts the row at the specified zero-based index.
- Passing an index out of range throws an IllegalArgumentException.
- No styles apply for TableItem, so you should always pass SWT.NONE.
Draw different foreground colors and fonts for text in a TableItem
/*******************************************************************************
* 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 different foreground colors for text in a TableItem.
*
* 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.Font;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.graphics.TextLayout;
import org.eclipse.swt.graphics.TextStyle;
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.TableItem;
public class TableItemForegroundFont {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setText("Table: Change style multiple times in cell");
shell.setLayout(new FillLayout());
Table table = new Table(shell, SWT.MULTI | SWT.FULL_SELECTION);
table.setLinesVisible(true);
for (int i = 0; i < 10; i++) {
new TableItem(table, SWT.NONE);
}
final TextLayout textLayout = new TextLayout(display);
textLayout.setText("SWT: Standard Widget Toolkit");
Font font1 = new Font(display, "Tahoma", 14, SWT.BOLD);
Font font2 = new Font(display, "Tahoma", 10, SWT.NORMAL);
Font font3 = new Font(display, "Tahoma", 14, SWT.ITALIC);
TextStyle style1 = new TextStyle(font1, display.getSystemColor(SWT.COLOR_BLUE), null);
TextStyle style2 = new TextStyle(font2, display.getSystemColor(SWT.COLOR_MAGENTA), null);
TextStyle style3 = new TextStyle(font3, display.getSystemColor(SWT.COLOR_RED), null);
textLayout.setStyle(style1, 0, 0);
textLayout.setStyle(style1, 5, 12);
textLayout.setStyle(style2, 1, 1);
textLayout.setStyle(style2, 14, 19);
textLayout.setStyle(style3, 2, 2);
textLayout.setStyle(style3, 21, 27);
/*
* 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() {
public void handleEvent(Event event) {
textLayout.draw(event.gc, event.x, event.y);
}
});
final Rectangle textLayoutBounds = textLayout.getBounds();
table.addListener(SWT.MeasureItem, new Listener() {
public void handleEvent(Event e) {
e.width = textLayoutBounds.width + 2;
e.height = textLayoutBounds.height + 2;
}
});
shell.setSize(400, 200);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
font1.dispose();
font2.dispose();
font3.dispose();
textLayout.dispose();
display.dispose();
}
}
Enlarge Table Cell
/*******************************************************************************
* 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: Images on the right hand side of a TableItem
*
* 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.Image;
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 TableCellEnlarge {
public static void main(String[] args) {
Display display = new Display();
final Image image = display.getSystemImage(SWT.ICON_INFORMATION);
Shell shell = new Shell(display);
shell.setText("Images on the right side of the TableItem");
shell.setLayout(new FillLayout());
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.
*/
Listener paintListener = new Listener() {
public void handleEvent(Event event) {
switch (event.type) {
case SWT.MeasureItem: {
Rectangle rect = image.getBounds();
event.width += rect.width;
event.height = Math.max(event.height, rect.height + 2);
break;
}
case SWT.PaintItem: {
int x = event.x + event.width;
Rectangle rect = image.getBounds();
int offset = Math.max(0, (event.height - rect.height) / 2);
event.gc.drawImage(image, x, event.y + offset);
break;
}
}
}
};
table.addListener(SWT.MeasureItem, paintListener);
table.addListener(SWT.PaintItem, paintListener);
for (int i = 0; i < columnCount; i++) {
table.getColumn(i).pack();
}
shell.setSize(500, 200);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
if (image != null)
image.dispose();
display.dispose();
}
}
Multiline Table cell
/*******************************************************************************
* 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;
/*
* example snippet: Multiple lines per TableItem
*
* 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.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 MultipleLinePerTableItem {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setText("Multiple lines in a TableItem");
shell.setLayout(new FillLayout());
final Table table = new Table(shell, SWT.MULTI | SWT.FULL_SELECTION);
table.setHeaderVisible(true);
table.setLinesVisible(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(new String[] { "item " + i + " a", "item " + i + " b", "item " + i + " c",
"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.
*/
Listener paintListener = new Listener() {
public void handleEvent(Event event) {
switch (event.type) {
case SWT.MeasureItem: {
TableItem item = (TableItem) event.item;
String text = getText(item, event.index);
Point size = event.gc.textExtent(text);
event.width = size.x;
event.height = Math.max(event.height, size.y);
break;
}
case SWT.PaintItem: {
TableItem item = (TableItem) event.item;
String text = getText(item, event.index);
Point size = event.gc.textExtent(text);
int offset2 = event.index == 0 ? Math.max(0, (event.height - size.y) / 2) : 0;
event.gc.drawText(text, event.x, event.y + offset2, true);
break;
}
case SWT.EraseItem: {
event.detail &= ~SWT.FOREGROUND;
break;
}
}
}
String getText(TableItem item, int column) {
String text = item.getText(column);
if (column != 0) {
int index = table.indexOf(item);
if ((index + column) % 3 == 1) {
text += "\nnew line";
}
if ((index + column) % 3 == 2) {
text += "\nnew line\nnew line";
}
}
return text;
}
};
table.addListener(SWT.MeasureItem, paintListener);
table.addListener(SWT.PaintItem, paintListener);
table.addListener(SWT.EraseItem, 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();
}
}
Set Cell Background color
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
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 CellBackground {
public static void main(String[] args) {
Display display = new Display();
Color red = display.getSystemColor(SWT.COLOR_RED);
Color gray = display.getSystemColor(SWT.COLOR_GRAY);
Color blue = display.getSystemColor(SWT.COLOR_BLUE);
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
Table table = new Table(shell, SWT.BORDER);
table.setBackground(gray);
TableColumn column1 = new TableColumn(table, SWT.NONE);
TableColumn column2 = new TableColumn(table, SWT.NONE);
TableColumn column3 = new TableColumn(table, SWT.NONE);
TableItem item = new TableItem(table, SWT.NONE);
item.setText(new String[] {"normal","blue background","red background"});
item.setBackground(1, blue);
item.setBackground(2, red);
column1.pack();
column2.pack();
column3.pack();
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}
Set Cell Foreground
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
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 CellForeground {
public static void main(String[] args) {
Display display = new Display();
Color red = display.getSystemColor(SWT.COLOR_RED);
Color gray = display.getSystemColor(SWT.COLOR_GRAY);
Color blue = display.getSystemColor(SWT.COLOR_BLUE);
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
Table table = new Table(shell, SWT.BORDER);
table.setBackground(gray);
TableColumn column1 = new TableColumn(table, SWT.NONE);
TableColumn column2 = new TableColumn(table, SWT.NONE);
TableColumn column3 = new TableColumn(table, SWT.NONE);
TableItem item = new TableItem(table, SWT.NONE);
item.setText(new String[] {"normal","blue foreground","red foreground"});
item.setForeground(1, blue);
item.setForeground(2, red);
column1.pack();
column2.pack();
column3.pack();
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}
Set Table Background and TableItem Foreground
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
public class TableBackgroundTableItemForeground{
public static void main(String[] args) {
Display display = new Display();
Color red = display.getSystemColor(SWT.COLOR_RED);
Color gray = display.getSystemColor(SWT.COLOR_GRAY);
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
Table table = new Table(shell, SWT.BORDER);
table.setBackground(gray);
TableColumn column1 = new TableColumn(table, SWT.NONE);
TableColumn column2 = new TableColumn(table, SWT.NONE);
TableColumn column3 = new TableColumn(table, SWT.NONE);
TableItem item = new TableItem(table, SWT.NONE);
item.setText(new String[] {"entire","row","red foreground"});
item.setForeground(red);
column1.pack();
column2.pack();
column3.pack();
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}
Set TableItem Background
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
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 TableItemBackground {
public static void main(String[] args) {
Display display = new Display();
Color red = display.getSystemColor(SWT.COLOR_RED);
Color gray = display.getSystemColor(SWT.COLOR_GRAY);
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
Table table = new Table(shell, SWT.BORDER);
table.setBackground(gray);
TableColumn column1 = new TableColumn(table, SWT.NONE);
TableColumn column2 = new TableColumn(table, SWT.NONE);
TableColumn column3 = new TableColumn(table, SWT.NONE);
TableItem item = new TableItem(table, SWT.NONE);
item.setText(new String[] { "entire", "row", "red background" });
item.setBackground(red);
column1.pack();
column2.pack();
column3.pack();
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}
Update table item text
/*******************************************************************************
* 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;
/*
* Table example snippet: update table item text
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*/
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Button;
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 TableItemUpdateText {
static char content = "a";
public static void main(String[] args) {
final Display display = new Display();
Shell shell = new Shell(display);
shell.setBounds(10, 10, 200, 240);
Table table = new Table(shell, SWT.NONE);
table.setBounds(10, 10, 160, 160);
final TableItem[] items = new TableItem[4];
for (int i = 0; i < 4; i++) {
new TableColumn(table, SWT.NONE).setWidth(40);
}
for (int i = 0; i < 4; i++) {
items[i] = new TableItem(table, SWT.NONE);
populateItem(items[i]);
}
Button button = new Button(shell, SWT.PUSH);
button.setText("Change");
button.pack();
button.setLocation(10, 180);
button.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
for (int i = 0; i < 4; i++) {
populateItem(items[i]);
}
}
});
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
static void populateItem(TableItem item) {
String stringContent = String.valueOf(content);
item.setText(new String[] { stringContent, stringContent, stringContent, stringContent });
content++;
if (content > "z")
content = "a";
}
}
