package org.kie.eclipse.navigator.preferences;
import org.eclipse.jface.preference.FieldEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
public class LabelFieldEditor extends FieldEditor {
/**
* Text limit constant (value <code>-1</code>) indicating unlimited
* text limit and width.
*/
public static int UNLIMITED = -1;
/**
* The Label field.
*/
Label labelField;
String labelText;
/**
* Width of text field in characters; initially unlimited.
*/
private int widthInChars = UNLIMITED;
public LabelFieldEditor() {
// TODO Auto-generated constructor stub
}
public LabelFieldEditor(String labelText, Composite parent) {
super("NONE", "", parent);
this.labelText = labelText;
}
@Override
protected void adjustForNumColumns(int numColumns) {
GridData gd = (GridData) labelField.getLayoutData();
gd.horizontalSpan = numColumns;
// We only grab excess space if we have to
// If another field editor has more columns then
// we assume it is setting the width.
gd.grabExcessHorizontalSpace = gd.horizontalSpan == 1;
}
@Override
protected void doFillIntoGrid(Composite parent, int numColumns) {
getLabelControl(parent);
labelField = getTextControl(parent);
GridData gd = new GridData();
gd.horizontalSpan = numColumns;
if (widthInChars != UNLIMITED) {
GC gc = new GC(labelField);
try {
Point extent = gc.textExtent("X");//$NON-NLS-1$
gd.widthHint = widthInChars * extent.x;
} finally {
gc.dispose();
}
} else {
gd.horizontalAlignment = GridData.FILL;
gd.grabExcessHorizontalSpace = true;
}
labelField.setLayoutData(gd);
}
public Label getTextControl(Composite parent) {
if (labelField == null) {
labelField = new Label(parent, SWT.NONE);
labelField.setFont(parent.getFont());
}
if (labelText!=null)
labelField.setText(labelText);
return labelField;
}
@Override
protected void doLoad() {
}
@Override
protected void doLoadDefault() {
}
@Override
protected void doStore() {
}
@Override
public int getNumberOfControls() {
return 1;
}
}