org.cs3.pdt.connector.util.preferences.EditorGroup.java Source code

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Here is the source code for org.cs3.pdt.connector.util.preferences.EditorGroup.java

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/*****************************************************************************
 * This file is part of the Prolog Development Tool (PDT)
 * 
 * WWW: http://sewiki.iai.uni-bonn.de/research/pdt/start
 * Mail: pdt@lists.iai.uni-bonn.de
 * Copyright (C): 2004-2012, CS Dept. III, University of Bonn
 * 
 * All rights reserved. This program is  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
 * 
 ****************************************************************************/

package org.cs3.pdt.connector.util.preferences;

import java.util.ArrayList;

import org.eclipse.jface.preference.FieldEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;

class EditorGroup {

    private Composite parent;
    private ArrayList<FieldEditor> editors = new ArrayList<FieldEditor>();
    private int maxColumns = 0;

    EditorGroup(Composite parent) {
        if (parent != null) {
            GridLayout layout = new GridLayout();
            parent.setLayout(layout);
            parent.setLayoutData(new GridData(SWT.FILL, SWT.BEGINNING, true, false));
        }
        this.parent = parent;
    }

    void addEditor(FieldEditor e) {
        if (!editors.contains(e)) {
            editors.add(e);
            maxColumns = Math.max(maxColumns, e.getNumberOfControls());
        }
    }

    void adjustGroupAndEditors() {
        if (parent != null) {
            parent.setLayout(new GridLayout(maxColumns, false));
        }
        for (FieldEditor e : editors) {
            if (e instanceof FieldEditorForStructuredPreferencePage) {
                ((FieldEditorForStructuredPreferencePage) e).adjustColumns(maxColumns);
            }
        }
    }

    int getMaxColumns() {
        return maxColumns;
    }

}