org.eclipse.buckminster.jnlp.p2.ui.UiUtils.java Source code

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Here is the source code for org.eclipse.buckminster.jnlp.p2.ui.UiUtils.java

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/*******************************************************************************
 * Copyright (c) 2004, 2006
 * Thomas Hallgren, Kenneth Olwing, Mitch Sonies
 * Pontus Rydin, Nils Unden, Peer Torngren
 * The code, documentation and other materials contained herein have been
 * licensed under the Eclipse Public License - v 1.0 by the individual
 * copyright holders listed above, as Initial Contributors under such license.
 * The text of such license is available at www.eclipse.org.
 *******************************************************************************/

package org.eclipse.buckminster.jnlp.p2.ui;

import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;

public class UiUtils {
    public static Button createPushButton(Composite parent, String key, SelectionListener listener) {
        Button button = new Button(parent, SWT.PUSH);
        if (key != null)
            button.setText(JFaceResources.getString(key));
        button.setFont(parent.getFont());
        if (listener != null)
            button.addSelectionListener(listener);
        return button;
    }

    public static Label createGridLabel(Composite parent, String string, int horizontalSpan, int widthHint,
            int style) {
        Label lbl = new Label(parent, style);
        GridData data = new GridData(SWT.FILL, SWT.CENTER, false, false);

        if (widthHint > 0) {
            data.widthHint = widthHint;
        }

        if (horizontalSpan > 1) {
            data.horizontalSpan = horizontalSpan;
        }

        lbl.setLayoutData(data);
        lbl.setText(string);

        return lbl;
    }

    public static Text createGridText(Composite parent, int horizontalSpan, int widthHint, ModifyListener listener,
            int style) {
        return createNoBorderGridText(parent, horizontalSpan, widthHint, listener, SWT.BORDER | style);
    }

    public static Text createNoBorderGridText(Composite parent, int horizontalSpan, int widthHint,
            ModifyListener listener, int style) {
        Text text = new Text(parent, style);
        GridData data = new GridData(SWT.FILL, SWT.CENTER, true, false);

        if (horizontalSpan > 0) {
            data.horizontalSpan = horizontalSpan;
        }

        if (widthHint > 0) {
            data.widthHint = widthHint;
        }

        text.setLayoutData(data);
        if (listener != null)
            text.addModifyListener(listener);

        return text;
    }

    public static Combo createGridCombo(Composite parent, int horizontalSpan, int widthHint,
            SelectionListener selectionListener, ModifyListener modifyListener, int style) {
        Combo combo = new Combo(parent, style);

        GridData data = new GridData(SWT.FILL, SWT.CENTER, true, false);

        if (horizontalSpan > 0) {
            data.horizontalSpan = horizontalSpan;
        }

        if (widthHint > 0) {
            data.widthHint = widthHint;
        }

        combo.setLayoutData(data);

        if (selectionListener != null) {
            combo.addSelectionListener(selectionListener);
        }

        if (modifyListener != null) {
            combo.addModifyListener(modifyListener);
        }

        return combo;
    }

    public static Combo createGridEnumCombo(Composite parent, int horizontalSpan, int widthHint, Enum<?>[] values,
            SelectionListener selectionListener, ModifyListener modifyListener, int style) {
        Combo combo = UiUtils.createGridCombo(parent, horizontalSpan, widthHint, selectionListener, modifyListener,
                style);
        for (Enum<?> value : values)
            combo.add(value.toString());
        combo.select(0);

        return combo;
    }

    public static Combo createGridArrayCombo(Composite parent, int horizontalSpan, int widthHint, String[] values,
            SelectionListener selectionListener, ModifyListener modifyListener, int style) {
        Combo combo = UiUtils.createGridCombo(parent, horizontalSpan, widthHint, selectionListener, modifyListener,
                style);
        combo.setItems(values);
        combo.select(0);

        return combo;
    }

    public static String trimmedValue(Text text) {
        String value = null;
        if (text != null) {
            value = text.getText().trim();
            if (value.length() == 0)
                value = null;
        }
        return value;
    }

    public static String trimmedValue(String string) {
        String value = null;

        if (string != null) {
            value = string.trim();
            if (value.length() == 0)
                value = null;
        }
        return value;
    }

    public static String getNotNullString(String string) {
        return string == null ? "" : string;
    }
}