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[platform-swt-dev] Decoreated Field
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Hello, im trying to create the typical decorator to an input text that
uses Eclipse 3.2 (typical bulb). I have found an example, but is for use
with RCP (inside Eclipse), and i want to use in a standalone
application. The snippet i have created is:
package com.dg.dg59.specialist;
import org.eclipse.core.runtime.Status;
import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.action.StatusLineManager;
import org.eclipse.jface.action.ToolBarManager;
import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.fieldassist.DecoratedField;
import org.eclipse.jface.fieldassist.FieldDecoration;
import org.eclipse.jface.fieldassist.TextControlCreator;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.window.ApplicationWindow;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import com.dg.dg59.specialist.images.Dummy;
/**
*
* @author asoto
* @author rob
* @invariant
*/
public class DecoratorSandbox extends ApplicationWindow {
private boolean showContentProposalCue = true, showSecondaryPopup =
true,
showRequiredFieldColor = true, showRequiredFieldDecoration = true,
showErrorDecoration = true, showErrorMessage = true,
showDecorationsOnFocus = true;
private FieldDecoration requiredFieldDecoration, cueDecoration,
errorDecoration;
private StyledText styledText;
/**
* Create the application window
*/
public DecoratorSandbox() {
super(null);
createActions();
addToolBar(SWT.FLAT | SWT.WRAP);
addMenuBar();
addStatusLine();
}
/**
* Create contents of the application window
* @param parent
*/
@Override
protected Control createContents(Composite parent) {
Label label;
Composite container = new Composite(parent, SWT.NONE);
GridLayout layout = new GridLayout();
container.setLayout(layout);
container.setLayoutData(new GridData(GridData.FILL_BOTH));
label = new Label(container, SWT.LEFT);
label.setLayoutData(new GridData());
label.setText("User name:");
// Create a field representing a user name
final DecoratedField field = new DecoratedField(container, SWT.BORDER,
new TextControlCreator());
createFieldDecorations(field);
Text text = (Text) field.getControl();
text.addModifyListener(new ModifyListener() {
public void modifyText(ModifyEvent event) {
handleModify(field);
}
});
// Extra field added to ensure everything lines up
label = new Label(container, SWT.LEFT);
label.setText("Password:");
DecoratedField anotherField = new DecoratedField(container,
SWT.BORDER,
new TextControlCreator());
((Text) anotherField.getControl()).setText("******");
container.addDisposeListener(new DisposeListener() {
public void widgetDisposed(DisposeEvent event) {
handleDialogDispose();
}
});
final Button button = new Button(container, SWT.NONE);
button.setLayoutData(new GridData());
Image image = new Image(getShell().getDisplay(),
"content_proposal_cue.gif");
button.setImage(image);
//
return container;
}
private void createFieldDecorations(DecoratedField field) {
if (showRequiredFieldDecoration) {
field.addFieldDecoration(getRequiredFieldDecoration(), SWT.TOP
| SWT.RIGHT, showDecorationsOnFocus);
}
if (showContentProposalCue) {
field.addFieldDecoration(getCueDecoration(), SWT.BOTTOM | SWT.LEFT,
showDecorationsOnFocus);
}
if (showErrorDecoration) {
field.addFieldDecoration(getErrorDecoration(), SWT.TOP | SWT.LEFT,
showDecorationsOnFocus);
}
}
private void handleDialogDispose() {
Image image;
if (cueDecoration != null && (image = cueDecoration.getImage()) !=
null) {
image.dispose();
cueDecoration = null;
}
if (requiredFieldDecoration != null
&& (image = requiredFieldDecoration.getImage()) != null) {
image.dispose();
requiredFieldDecoration = null;
}
if (errorDecoration != null
&& (image = errorDecoration.getImage()) != null) {
image.dispose();
errorDecoration = null;
}
}
private FieldDecoration getCueDecoration() {
if (cueDecoration == null) {
ImageDescriptor descriptor = ImageDescriptor.createFromFile(
Dummy.class, "images/content_proposal_cue.gif"); //$NON-NLS-1$
cueDecoration = new FieldDecoration(descriptor
.createImage(getShell().getDisplay()),
"Content assist available for this field, press "
);
}
return cueDecoration;
}
private FieldDecoration getErrorDecoration() {
if (errorDecoration == null) {
// Image image = new Image(Display.getCurrent(), )
// ImageDescriptor.createFromImage()
ImageDescriptor descriptor = ImageDescriptor.createFromFile(
Dummy.class, "images/content_proposal_cue.gif"); //$NON-NLS-1$
errorDecoration = new FieldDecoration(descriptor
.createImage(getShell().getDisplay()),
"Invalid data in field");
}
return errorDecoration;
}
private FieldDecoration getRequiredFieldDecoration() {
if (requiredFieldDecoration == null) {
Image image = new Image(getShell().getDisplay(),
"content_proposal_cue.gif");
getShell().setImage(image);
ImageDescriptor descriptor = ImageDescriptor.createFromImage(image);
// ImageDescriptor descriptor = ImageDescriptor.createFromFile(
// Dummy.class, "images/content_proposal_cue.gif"); //$NON-NLS-1$
requiredFieldDecoration = new FieldDecoration(descriptor
.createImage(getShell().getDisplay()),
"Field must not be empty");
}
return requiredFieldDecoration;
}
private void handleModify(DecoratedField field) {
String contents = ((Text) field.getControl()).getText();
// if (!isValidUser(contents)) {
// showError(field);
// } else {
// hideError(field);
// }
boolean isEmpty = contents.length() == 0;
if (showRequiredFieldColor) {
if (isEmpty) {
field.getControl().setBackground(
field.getControl().getDisplay().getSystemColor(
SWT.COLOR_YELLOW));
} else {
//field.getControl().setBackground(defaultTextColor);
}
} else if (showRequiredFieldDecoration) {
if (isEmpty)
field.showDecoration(getRequiredFieldDecoration());
else
field.hideDecoration(getRequiredFieldDecoration());
}
}
// private boolean isValidUser(String username) {
// for (int i = 0; i < validUsers.length; i++) {
// if (validUsers[i].equals(username)) {
// return true;
// }
// }
// return false;
// }
private void showError(DecoratedField field) {
if (showErrorMessage) {
// updateStatus(new Status(Status.ERROR,
// "org.eclipse.examples.contentassist", 0,
// getErrorDecoration().getDescription(), null));
}
if (showErrorDecoration)
field.showDecoration(getErrorDecoration());
}
private void hideError(DecoratedField field) {
if (showErrorMessage) {
// this.updateStatus(Status.OK_STATUS);
}
if (showErrorDecoration)
field.hideDecoration(getErrorDecoration());
}
/**
* Create the actions
*/
private void createActions() {
// Create the actions
}
/**
* Create the menu manager
* @return the menu manager
*/
@Override
protected MenuManager createMenuManager() {
MenuManager menuManager = new MenuManager("menu");
return menuManager;
}
/**
* Create the toolbar manager
* @return the toolbar manager
*/
@Override
protected ToolBarManager createToolBarManager(int style) {
ToolBarManager toolBarManager = new ToolBarManager(style);
return toolBarManager;
}
/**
* Create the status line manager
* @return the status line manager
*/
@Override
protected StatusLineManager createStatusLineManager() {
StatusLineManager statusLineManager = new StatusLineManager();
statusLineManager.setMessage(null, "");
return statusLineManager;
}
/**
* Launch the application
* @param args
*/
public static void main(String args[]) {
try {
DecoratorSandbox window = new DecoratorSandbox();
window.setBlockOnOpen(true);
window.open();
Display.getCurrent().dispose();
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Configure the shell
* @param newShell
*/
@Override
protected void configureShell(Shell newShell) {
super.configureShell(newShell);
newShell.setText("New Application");
}
/**
* Return the initial size of the window
*/
@Override
protected Point getInitialSize() {
return new Point(500, 375);
}
}
It is a copy paste of the example TaskAssistant Example.
Thank you very much.
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