de.byteholder.geoclipse.util.PixelConverter.java Source code

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Here is the source code for de.byteholder.geoclipse.util.PixelConverter.java

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/*******************************************************************************
 * Copyright (c) 2007 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 de.byteholder.geoclipse.util;

import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.swt.graphics.FontMetrics;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.widgets.Control;

/**
 * Helper class to convert from various
 * dimensions into pixels.
 * 
 * @since 3.3
 */
public class PixelConverter {

    private FontMetrics fFontMetrics;

    public PixelConverter(final Control control) {
        final GC gc = new GC(control);
        gc.setFont(control.getFont());
        fFontMetrics = gc.getFontMetrics();
        gc.dispose();
    }

    /*
     * @see org.eclipse.jface.dialogs.DialogPage#convertHeightInCharsToPixels(int)
     */
    public int convertHeightInCharsToPixels(final int chars) {
        return Dialog.convertHeightInCharsToPixels(fFontMetrics, chars);
    }

    /*
     * @see org.eclipse.jface.dialogs.DialogPage#convertHorizontalDLUsToPixels(int)
     */
    public int convertHorizontalDLUsToPixels(final int dlus) {
        return Dialog.convertHorizontalDLUsToPixels(fFontMetrics, dlus);
    }

    /*
     * see org.eclipse.jface.dialogs.DialogPage#convertVerticalDLUsToPixels(int)
     */
    public int convertVerticalDLUsToPixels(final int dlus) {
        return Dialog.convertVerticalDLUsToPixels(fFontMetrics, dlus);
    }

    /*
     * @see org.eclipse.jface.dialogs.DialogPage#convertWidthInCharsToPixels(int)
     */
    public int convertWidthInCharsToPixels(final int chars) {
        return Dialog.convertWidthInCharsToPixels(fFontMetrics, chars);
    }

}