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== 17. Create a dialog shell ==



<source lang="java">
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class DialogShellCreate {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);

Shell dialog = new Shell(shell);
dialog.setText("Dialog");
dialog.setSize(200, 200);
dialog.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}</source>



== 17. Create a dialog shell and position it ==



<source lang="java">
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class DialogShellPositionIt {
public static void main(String[] args) {
final Display display = new Display();
final Shell shell = new Shell(display);
Shell dialog = new Shell(shell, SWT.DIALOG_TRIM | SWT.APPLICATION_MODAL);
Point pt = display.getCursorLocation();
dialog.setLocation(pt.x, pt.y);
dialog.setText("Dialog Shell");
dialog.setSize(100, 100);
dialog.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}</source>



== 17. Create a dialog shell (prompt for a value) ==



<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;
/*
* Shell example snippet: create a dialog shell (prompt for a value)
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*/
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.RowLayout;
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;
public class DialogShellPromptValue {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.pack();

final boolean[] result = new boolean[1];
final Shell dialog = new Shell(shell, SWT.DIALOG_TRIM | SWT.APPLICATION_MODAL);
dialog.setLayout(new RowLayout());
final Button ok = new Button(dialog, SWT.PUSH);
ok.setText("OK");
Button cancel = new Button(dialog, SWT.PUSH);
cancel.setText("Cancel");
Listener listener = new Listener() {
public void handleEvent(Event event) {
result[0] = event.widget == ok;
dialog.close();
}
};
ok.addListener(SWT.Selection, listener);
cancel.addListener(SWT.Selection, listener);
dialog.pack();
dialog.open();
System.out.println("Prompt ...");
while (!dialog.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
System.out.println("Result: " + result[0]);
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}</source>



== 17. Create your own dialog classes which allows users to input a String ==



<source lang="java">
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Dialog;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
class InputDialog extends Dialog {
private String message;
private String input;
public InputDialog(Shell parent) {
this(parent, SWT.DIALOG_TRIM | SWT.APPLICATION_MODAL);
}
public InputDialog(Shell parent, int style) {
super(parent, style);
setText("Input Dialog");
setMessage("Please enter a value:");
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public String getInput() {
return input;
}
public void setInput(String input) {
this.input = input;
}
public String open() {
Shell shell = new Shell(getParent(), getStyle());
shell.setText(getText());
createContents(shell);
shell.pack();
shell.open();
Display display = getParent().getDisplay();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
return input;
}
private void createContents(final Shell shell) {
shell.setLayout(new GridLayout(2, true));
Label label = new Label(shell, SWT.NONE);
label.setText(message);
GridData data = new GridData();
data.horizontalSpan = 2;
label.setLayoutData(data);
final Text text = new Text(shell, SWT.BORDER);
data = new GridData(GridData.FILL_HORIZONTAL);
data.horizontalSpan = 2;
text.setLayoutData(data);
Button ok = new Button(shell, SWT.PUSH);
ok.setText("OK");
data = new GridData(GridData.FILL_HORIZONTAL);
ok.setLayoutData(data);
ok.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
input = text.getText();
shell.close();
}
});
Button cancel = new Button(shell, SWT.PUSH);
cancel.setText("Cancel");
data = new GridData(GridData.FILL_HORIZONTAL);
cancel.setLayoutData(data);
cancel.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent event) {
input = null;
shell.close();
}
});
shell.setDefaultButton(ok);
}
}
public class CustomInputDialog {
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
InputDialog dlg = new InputDialog(shell);
String input = dlg.open();
if (input != null) {
// User clicked OK; set the text into the label
System.out.println(input);
}
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}</source>



== 17. Creating Your Own Dialogs ==

<p>To create your own dialog, you do the following:</p>
<OL><LI>Subclass org.eclipse.swt.widgets.Dialog.</LI><LI>Implement a method named open() that returns an object appropriate to your dialog"s purpose.</LI><LI>In open(), create the window, create the controls and event handlers (including controls and event handlers to dismiss the dialog), and display the window.</LI><LI>Provide getters and setters for any data.</LI></OL>

== 17. Display an Empty Dialog ==



<source lang="java">
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class DialogEmptyDisplay {
public static void main(String[] args) {
final Display display = new Display();
final Shell shell = new Shell(display, SWT.NO_TRIM | SWT.ON_TOP);
final Shell dialog =new Shell(shell, SWT.DIALOG_TRIM | SWT.APPLICATION_MODAL);
dialog.setLayout(new RowLayout());
dialog.pack();
dialog.open();
// Move the dialog to the center of the top level shell.
Rectangle shellBounds = shell.getBounds();
Point dialogSize = dialog.getSize();
dialog.setLocation(
shellBounds.x + (shellBounds.width - dialogSize.x) / 2,
shellBounds.y + (shellBounds.height - dialogSize.y) / 2);

// Set up the event loop.
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
// If no more entries in event queue
display.sleep();
}
}
display.dispose();
}
}</source>



== 17. Prevent escape from closing a dialog ==



<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;
/*
* Shell example snippet: prevent escape from closing a dialog
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*/
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
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;
public class ShellEscapeCloseDialog {
public static void main(String[] args) {
Display display = new Display();
final Shell shell = new Shell(display);
Button b = new Button(shell, SWT.PUSH);
b.setText("Open Dialog ...");
b.pack();
b.setLocation(10, 10);
b.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent se) {
Shell dialog = new Shell(shell, SWT.DIALOG_TRIM);
dialog.addListener(SWT.Traverse, new Listener() {
public void handleEvent(Event e) {
if (e.detail == SWT.TRAVERSE_ESCAPE) {
e.doit = false;
}
}
});
dialog.open();
}
});
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}</source>



== 17. Using the Dialogs ==

<OL><LI>The common dialog classes in SWT descend from SWT"s abstract Dialog class (org.eclipse.swt.widgets.Dialog).</LI><LI>A dialog"s parent, which is passed to the constructor, is always a Shell object.</LI></OL>
ConstantDescriptionSWT.APPLICATION_MODALModal to the application; input is blocked to other windows in the application.SWT.PRIMARY_MODALModal to the parent window of the dialog; input is blocked to the parent of the dialog only.SWT.SYSTEM_MODALInput is blocked to all other windows of all applications until the dialog is dismissed.SWT.NONEModeless (the default).

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в 17:44, 31 мая 2010

Admin: 1 версия