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TextFocusControlListener.java
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TextFocusControlListener.java
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/*******************************************************************************
* Copyright (c) 2011 Laurent CARON.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Laurent CARON (laurent.caron at gmail dot com) - Initial API and implementation
*******************************************************************************/
package org.eclipse.nebula.widgets.opal.promptsupport;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.widgets.Text;
/**
* Focus/Control listener for a Text widget
*/
class TextFocusControlListener extends BaseFocusControlListener<Text> implements ModifyListener {
protected boolean updatingPropmpt = false;
/**
* Constructor
*
* @param control control on which this listener will be attached
*/
public TextFocusControlListener(final Text control) {
super(control);
}
@Override
void hookControl() {
super.hookControl();
// Attach dedicated listeners
control.addModifyListener(this);
}
@Override
public void modifyText(ModifyEvent e) {
if (updatingPropmpt) {
return;
}
final String trimmedText = control.getText().trim();
applyInitialLook();
if (!EMPTY_STRING.equals(trimmedText)) {
PromptSupport.setPromptDisplayed(control, false);
return;
}
if (!control.isFocusControl()) {
storeInitialLook();
applyPromptLook();
fillPromptText();
PromptSupport.setPromptDisplayed(control, true);
return;
}
}
/**
* @see org.eclipse.nebula.widgets.opal.promptsupport.BaseFocusControlListener#hidePrompt()
*/
@Override
protected void hidePrompt() {
updatePrompt(EMPTY_STRING);
}
/**
* @see org.eclipse.nebula.widgets.opal.promptsupport.BaseFocusControlListener#highLightPrompt()
*/
@Override
protected void highLightPrompt() {
// If we do a select all directly, it's not working !
control.getDisplay().asyncExec(() -> {
if (control.isDisposed()) {
return;
}
control.selectAll();
});
}
/**
* @see org.eclipse.nebula.widgets.opal.promptsupport.BaseFocusControlListener#fillPromptText()
*/
@Override
protected void fillPromptText() {
final String promptText = PromptSupport.getPrompt(control);
if (promptText != null) {
updatePrompt(promptText);
}
}
/**
* @see org.eclipse.nebula.widgets.opal.promptsupport.BaseFocusControlListener#isFilled()
*/
@Override
protected boolean isFilled() {
final String promptText = PromptSupport.getPrompt(control);
final String trimmedText = control.getText().trim();
if (promptText != null && promptText.equals(trimmedText) && PromptSupport.isPromptDisplayed(control)) {
return false;
}
return !EMPTY_STRING.equals(trimmedText);
}
protected void updatePrompt(String prompt) {
try {
updatingPropmpt = true;
control.setText(prompt);
} finally {
updatingPropmpt = false;
}
}
}