Java Tutorial/SWT/Table Editor
Содержание
- 1 Add action listener to Table Button Cell Editor
- 2 Add selection listener to TableCursor
- 3 Edit the text of a table item (in place)
- 4 Install Table Editor when navigating the Table Cursor
- 5 Placing the Text Editor after mouse click and exchange data between table cell and editor
- 6 Table Cell Editor: Combo, Text and Button
- 7 TableEditor: tab and escape event
- 8 Using TableEditor
Add action listener to Table Button Cell Editor
<source lang="java">
import org.eclipse.swt.SWT; import org.eclipse.swt.custom.TableEditor; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.graphics.Color; import org.eclipse.swt.graphics.RGB; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.ColorDialog; 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 TableEditorButtonActionListener {
public static void main(String[] args) {
Display display = new Display();
final Shell shell = new Shell(display);
shell.setText("Text Table Editor");
shell.setLayout(new FillLayout());
final Table table = new Table(shell, SWT.SINGLE | SWT.FULL_SELECTION | SWT.HIDE_SELECTION);
table.setHeaderVisible(true);
table.setLinesVisible(true);
for (int i = 0; i < 5; i++) {
TableColumn column = new TableColumn(table, SWT.CENTER);
column.setText("Column " + (i + 1));
column.pack();
}
// Create five table editors for color
TableEditor[] colorEditors = new TableEditor[5];
// Create five buttons for changing color
Button[] colorButtons = new Button[5];
for (int i = 0; i < 5; i++) {
final TableItem item = new TableItem(table, SWT.NONE);
colorEditors[i] = new TableEditor(table);
colorButtons[i] = new Button(table, SWT.PUSH);
colorButtons[i].setText("Color...");
colorButtons[i].ruputeSize(SWT.DEFAULT, table.getItemHeight());
colorEditors[i].grabHorizontal = true;
colorEditors[i].minimumHeight = colorButtons[i].getSize().y;
colorEditors[i].minimumWidth = colorButtons[i].getSize().x;
colorEditors[i].setEditor(colorButtons[i], item, 0);
colorButtons[i].addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
ColorDialog dialog = new ColorDialog(shell);
RGB rgb = dialog.open();
if (rgb != null) {
table.setBackground(new Color(shell.getDisplay(), rgb));
}
}
});
}
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}</source>
Add selection listener to TableCursor
<source lang="java">
import org.eclipse.swt.SWT; import org.eclipse.swt.custom.ControlEditor; import org.eclipse.swt.custom.TableCursor; import org.eclipse.swt.events.KeyAdapter; import org.eclipse.swt.events.KeyEvent; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; 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; import org.eclipse.swt.widgets.Text; public class TableCursorListenerSelection {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setText("Table Cursor Test");
shell.setLayout(new FillLayout());
final Table table = new Table(shell, SWT.SINGLE | SWT.FULL_SELECTION);
table.setHeaderVisible(true);
table.setLinesVisible(true);
for (int i = 0; i < 5; i++) {
TableColumn column = new TableColumn(table, SWT.CENTER);
column.setText("Column " + (i + 1));
column.pack();
}
for (int i = 0; i < 5; i++) {
new TableItem(table, SWT.NONE);
}
final TableCursor cursor = new TableCursor(table, SWT.NONE);
final ControlEditor editor = new ControlEditor(cursor);
editor.grabHorizontal = true;
editor.grabVertical = true;
cursor.addSelectionListener(new SelectionAdapter() {
// This is called as the user navigates around the table
public void widgetSelected(SelectionEvent event) {
// Select the row in the table where the TableCursor is
table.setSelection(new TableItem[] { cursor.getRow() });
}
// This is called when the user hits Enter
public void widgetDefaultSelected(SelectionEvent event) {
final Text text = new Text(cursor, SWT.NONE);
text.setFocus();
// Copy the text from the cell to the Text control
text.setText(cursor.getRow().getText(cursor.getColumn()));
text.setFocus();
// Add a handler to detect key presses
text.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent event) {
switch (event.keyCode) {
case SWT.CR:
cursor.getRow().setText(cursor.getColumn(), text.getText());
case SWT.ESC:
text.dispose();
break;
}
}
});
editor.setEditor(text);
}
});
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}</source>
Edit the text of a table item (in place)
<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: edit the text of a table item (in place) * * 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.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Control; 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; import org.eclipse.swt.widgets.Text; public class TableItemEditor {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
final Table table = new Table(shell, SWT.FULL_SELECTION | SWT.HIDE_SELECTION);
TableColumn column1 = new TableColumn(table, SWT.NONE);
TableColumn column2 = new TableColumn(table, SWT.NONE);
for (int i = 0; i < 10; i++) {
TableItem item = new TableItem(table, SWT.NONE);
item.setText(new String[] { "item " + i, "edit this value" });
}
column1.pack();
column2.pack();
final TableEditor editor = new TableEditor(table);
// The editor must have the same size as the cell and must
// not be any smaller than 50 pixels.
editor.horizontalAlignment = SWT.LEFT;
editor.grabHorizontal = true;
editor.minimumWidth = 50;
// editing the second column
final int EDITABLECOLUMN = 1;
table.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
// Clean up any previous editor control
Control oldEditor = editor.getEditor();
if (oldEditor != null)
oldEditor.dispose();
// Identify the selected row
TableItem item = (TableItem) e.item;
if (item == null)
return;
// The control that will be the editor must be a child of the Table
Text newEditor = new Text(table, SWT.NONE);
newEditor.setText(item.getText(EDITABLECOLUMN));
newEditor.addModifyListener(new ModifyListener() {
public void modifyText(ModifyEvent me) {
Text text = (Text) editor.getEditor();
editor.getItem().setText(EDITABLECOLUMN, text.getText());
}
});
newEditor.selectAll();
newEditor.setFocus();
editor.setEditor(newEditor, item, EDITABLECOLUMN);
}
});
shell.setSize(300, 300);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}</source>
<source lang="java">
import org.eclipse.swt.SWT; import org.eclipse.swt.custom.ControlEditor; import org.eclipse.swt.custom.TableCursor; import org.eclipse.swt.events.KeyAdapter; import org.eclipse.swt.events.KeyEvent; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; 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; import org.eclipse.swt.widgets.Text; public class TableCursorTableEditor {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setText("Table Cursor Test");
shell.setLayout(new FillLayout());
final Table table = new Table(shell, SWT.SINGLE | SWT.FULL_SELECTION);
table.setHeaderVisible(true);
table.setLinesVisible(true);
for (int i = 0; i < 5; i++) {
TableColumn column = new TableColumn(table, SWT.CENTER);
column.setText("Column " + (i + 1));
column.pack();
}
for (int i = 0; i < 5; i++) {
new TableItem(table, SWT.NONE);
}
final TableCursor cursor = new TableCursor(table, SWT.NONE);
final ControlEditor editor = new ControlEditor(cursor);
editor.grabHorizontal = true;
editor.grabVertical = true;
cursor.addSelectionListener(new SelectionAdapter() {
// This is called as the user navigates around the table
public void widgetSelected(SelectionEvent event) {
// Select the row in the table where the TableCursor is
table.setSelection(new TableItem[] { cursor.getRow() });
}
// This is called when the user hits Enter
public void widgetDefaultSelected(SelectionEvent event) {
final Text text = new Text(cursor, SWT.NONE);
text.setFocus();
// Copy the text from the cell to the Text control
text.setText(cursor.getRow().getText(cursor.getColumn()));
text.setFocus();
// Add a handler to detect key presses
text.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent event) {
switch (event.keyCode) {
case SWT.CR:
cursor.getRow().setText(cursor.getColumn(), text.getText());
case SWT.ESC:
text.dispose();
break;
}
}
});
editor.setEditor(text);
}
});
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}</source>
Placing the Text Editor after mouse click and exchange data between table cell and editor
<source lang="java">
import org.eclipse.swt.SWT; import org.eclipse.swt.custom.TableEditor; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.events.MouseAdapter; import org.eclipse.swt.events.MouseEvent; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.Rectangle; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Control; 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; import org.eclipse.swt.widgets.Text; public class TableEditorMouseClickText {
public static void main(String[] args) {
Display display = new Display();
final Shell shell = new Shell(display);
shell.setText("Text Table Editor");
shell.setLayout(new FillLayout());
final Table table = new Table(shell, SWT.SINGLE | SWT.FULL_SELECTION | SWT.HIDE_SELECTION);
table.setHeaderVisible(true);
table.setLinesVisible(true);
for (int i = 0; i < 5; i++) {
TableColumn column = new TableColumn(table, SWT.CENTER);
column.setText("Column " + (i + 1));
column.pack();
}
for (int i = 0; i < 5; i++) {
final TableItem item = new TableItem(table, SWT.NONE);
}
final TableEditor editor = new TableEditor(table);
editor.horizontalAlignment = SWT.LEFT;
editor.grabHorizontal = true;
table.addMouseListener(new MouseAdapter() {
public void mouseDown(MouseEvent event) {
Control old = editor.getEditor();
if (old != null)
old.dispose();
Point pt = new Point(event.x, event.y);
final TableItem item = table.getItem(pt);
if (item == null) {
return;
}
int column = -1;
for (int i = 0, n = table.getColumnCount(); i < n; i++) {
Rectangle rect = item.getBounds(i);
if (rect.contains(pt)) {
column = i;
break;
}
}
if (column != 1) {
return;
}
final Text text = new Text(table, SWT.NONE);
text.setForeground(item.getForeground());
text.setText(item.getText(column));
text.setForeground(item.getForeground());
text.selectAll();
text.setFocus();
editor.minimumWidth = text.getBounds().width;
editor.setEditor(text, item, column);
final int col = column;
text.addModifyListener(new ModifyListener() {
public void modifyText(ModifyEvent event) {
item.setText(col, text.getText());
}
});
}
});
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}</source>
Table Cell Editor: Combo, Text and Button
<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; /*
* Table example snippet: place arbitrary controls 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.CCombo; import org.eclipse.swt.custom.TableEditor; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Button; 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; import org.eclipse.swt.widgets.Text; public class TableCellEditorComboTextButton {
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 | SWT.MULTI);
table.setLinesVisible(true);
for (int i = 0; i < 3; i++) {
TableColumn column = new TableColumn(table, SWT.NONE);
column.setWidth(100);
}
for (int i = 0; i < 12; i++) {
new TableItem(table, SWT.NONE);
}
TableItem[] items = table.getItems();
for (int i = 0; i < items.length; i++) {
TableEditor editor = new TableEditor(table);
CCombo combo = new CCombo(table, SWT.NONE);
combo.setText("CCombo");
combo.add("item 1");
combo.add("item 2");
editor.grabHorizontal = true;
editor.setEditor(combo, items[i], 0);
editor = new TableEditor(table);
Text text = new Text(table, SWT.NONE);
text.setText("Text");
editor.grabHorizontal = true;
editor.setEditor(text, items[i], 1);
editor = new TableEditor(table);
Button button = new Button(table, SWT.CHECK);
button.pack();
editor.minimumWidth = button.getSize().x;
editor.horizontalAlignment = SWT.LEFT;
editor.setEditor(button, items[i], 2);
}
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}</source>
TableEditor: tab and escape event
<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: edit a cell in a table (in place, fancy) * * 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.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; import org.eclipse.swt.widgets.Text; public class TableEditorTabEscapeEvent{
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
final Table table = new Table(shell, SWT.BORDER | SWT.MULTI);
table.setLinesVisible(true);
for (int i = 0; i < 3; i++) {
TableColumn column = new TableColumn(table, SWT.NONE);
column.setWidth(100);
}
for (int i = 0; i < 3; i++) {
TableItem item = new TableItem(table, SWT.NONE);
item.setText(new String[] { "" + i, "" + i, "" + i });
}
final TableEditor editor = new TableEditor(table);
editor.horizontalAlignment = SWT.LEFT;
editor.grabHorizontal = true;
table.addListener(SWT.MouseDown, new Listener() {
public void handleEvent(Event event) {
Rectangle clientArea = table.getClientArea();
Point pt = new Point(event.x, event.y);
int index = table.getTopIndex();
while (index < table.getItemCount()) {
boolean visible = false;
final TableItem item = table.getItem(index);
for (int i = 0; i < table.getColumnCount(); i++) {
Rectangle rect = item.getBounds(i);
if (rect.contains(pt)) {
final int column = i;
final Text text = new Text(table, SWT.NONE);
Listener textListener = new Listener() {
public void handleEvent(final Event e) {
switch (e.type) {
case SWT.FocusOut:
item.setText(column, text.getText());
text.dispose();
break;
case SWT.Traverse:
switch (e.detail) {
case SWT.TRAVERSE_RETURN:
item.setText(column, text.getText());
// FALL THROUGH
case SWT.TRAVERSE_ESCAPE:
text.dispose();
e.doit = false;
}
break;
}
}
};
text.addListener(SWT.FocusOut, textListener);
text.addListener(SWT.Traverse, textListener);
editor.setEditor(text, item, i);
text.setText(item.getText(i));
text.selectAll();
text.setFocus();
return;
}
if (!visible && rect.intersects(clientArea)) {
visible = true;
}
}
if (!visible)
return;
index++;
}
}
});
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}</source>
Using TableEditor
- TableEditor derives from ControlEditor.
- TableEditor belongs to a cell.
- Use the setters for row and column to set the cell, like this:
<source lang="java">
TableEditor editor = new TableEditor(myTable); editor.setEditor(myControl); editor.setItem(myItem); editor.setColumn(myColumn);</source>
