Java Tutorial/SWT/StackLayout
Содержание
Configure the margin: marginHeight and marginWidth
<source lang="java">
/******************************************************************************
* Copyright (c) 1998, 2004 Jackwind Li Guojie * All right reserved. * * Created on Jan 31, 2004 1:05:58 AM by JACK * $Id$ * * visit: http://www.asprise.ru/swt *****************************************************************************/
import org.eclipse.swt.SWT; import org.eclipse.swt.custom.StackLayout; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class StackLayoutControlMargin {
public static void main(String[] args) {
Display display = new Display();
final Shell shell = new Shell(display);
final StackLayout stackLayout = new StackLayout();
stackLayout.marginHeight=20;
stackLayout.marginWidth=20;
shell.setLayout(stackLayout);
final Button[] buttons = new Button[3];
for (int i = 0; i < buttons.length; i++) {
buttons[i] = new Button(shell, SWT.NULL);
buttons[i].setText("Button #" + i);
buttons[i].addSelectionListener(new SelectionListener() {
public void widgetSelected(SelectionEvent e) {
// Flip to next button.
Button nextButton = null;
for (int i = 0; i < buttons.length; i++) {
if (buttons[i] == e.widget) {
if (i == buttons.length - 1)
nextButton = buttons[0];
else
nextButton = buttons[i + 1];
}
}
stackLayout.topControl = nextButton;
shell.layout();
}
public void widgetDefaultSelected(SelectionEvent e) {
}
});
}
stackLayout.topControl = buttons[0];
shell.setSize(450, 400);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}</source>
Use a StackLayout to switch between Composites
<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; /*
* StackLayout example snippet: use a StackLayout to switch between Composites. * * 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.StackLayout; import org.eclipse.swt.layout.RowLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.ruposite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Shell; public class StackLayoutSwitchComposites {
static int pageNum = -1;
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setBounds(10, 10, 300, 200);
// create the composite that the pages will share
final Composite contentPanel = new Composite(shell, SWT.BORDER);
contentPanel.setBounds(100, 10, 190, 90);
final StackLayout layout = new StackLayout();
contentPanel.setLayout(layout);
// create the first page"s content
final Composite page0 = new Composite(contentPanel, SWT.NONE);
page0.setLayout(new RowLayout());
Label label = new Label(page0, SWT.NONE);
label.setText("Label on page 1");
label.pack();
// create the second page"s content
final Composite page1 = new Composite(contentPanel, SWT.NONE);
page1.setLayout(new RowLayout());
Button button = new Button(page1, SWT.NONE);
button.setText("Button on page 2");
button.pack();
// create the button that will switch between the pages
Button pageButton = new Button(shell, SWT.PUSH);
pageButton.setText("Push");
pageButton.setBounds(10, 10, 80, 25);
pageButton.addListener(SWT.Selection, new Listener() {
public void handleEvent(Event event) {
pageNum = ++pageNum % 2;
layout.topControl = pageNum == 0 ? page0 : page1;
contentPanel.layout();
}
});
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}</source>
Using StackLayout
- All controls are the same size and are put in the same location.
- They"re all stacked atop each other.
- only the topmost control is visible.
<source lang="java">
import org.eclipse.swt.SWT; import org.eclipse.swt.custom.StackLayout; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class StackLayoutTest {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
StackLayout layout = new StackLayout();
shell.setLayout(layout);
StackLayoutSelectionAdapter adapter = new StackLayoutSelectionAdapter(shell, layout);
Button one = new Button(shell, SWT.PUSH);
one.setText("one");
one.addSelectionListener(adapter);
Button two = new Button(shell, SWT.PUSH);
two.setText("two");
two.addSelectionListener(adapter);
Button three = new Button(shell, SWT.PUSH);
three.setText("three");
three.addSelectionListener(adapter);
layout.topControl = one;
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
} class StackLayoutSelectionAdapter extends SelectionAdapter {
Shell shell;
StackLayout layout;
public StackLayoutSelectionAdapter(Shell shell, StackLayout layout) {
this.shell = shell;
this.layout = layout;
}
public void widgetSelected(SelectionEvent event) {
Control control = layout.topControl;
Control[] children = shell.getChildren();
int i = 0;
for (int n = children.length; i < n; i++) {
Control child = children[i];
if (child == control) {
break;
}
}
i = i+1;
if (i >= children.length)
i = 0;
layout.topControl = children[i];
shell.layout();
}
}</source>
Using StackLayouts
To set a particular control on the top, you should first set the topControl field of the StackLayout with that control and then call the layout method of the parent composite.
<source lang="java">
import org.eclipse.swt.SWT; import org.eclipse.swt.custom.StackLayout; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class StackLayoutButtons {
public static void main(String[] args) {
Display display = new Display();
final Shell shell = new Shell(display);
final StackLayout stackLayout = new StackLayout();
shell.setLayout(stackLayout);
final Button[] buttons = new Button[3];
for (int i = 0; i < buttons.length; i++) {
buttons[i] = new Button(shell, SWT.NULL);
buttons[i].setText("Button #" + i);
buttons[i].addSelectionListener(new SelectionListener() {
public void widgetSelected(SelectionEvent e) {
// Flip to next button.
Button nextButton = null;
for (int i = 0; i < buttons.length; i++) {
if (buttons[i] == e.widget) {
if (i == buttons.length - 1)
nextButton = buttons[0];
else
nextButton = buttons[i + 1];
}
}
stackLayout.topControl = nextButton;
shell.layout();
}
public void widgetDefaultSelected(SelectionEvent e) {
}
});
}
stackLayout.topControl = buttons[0];
shell.setSize(450, 400);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}</source>
