net.bpelunit.framework.client.eclipse.dialog.Field.java Source code

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Here is the source code for net.bpelunit.framework.client.eclipse.dialog.Field.java

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/**
 * This file belongs to the BPELUnit utility and Eclipse plugin set. See enclosed
 * license file for more information.
 * 
 */
package net.bpelunit.framework.client.eclipse.dialog;

import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;

/**
 * Abstract superclass of all fields for the {@link FieldBasedInputDialog}.
 * 
 * @version $Id$
 * @author Philip Mayer
 * 
 */
public abstract class Field {

    private FieldBasedInputDialog fDialog;
    private String fLabelText;
    private String fInitialValue;

    private DialogFieldValidator fValidator;

    public Field(FieldBasedInputDialog inputDialog, String labelText, String initialValue) {
        fDialog = inputDialog;
        fLabelText = labelText;
        fInitialValue = initialValue;
    }

    protected abstract void createControl(Composite parent);

    public abstract String getSelection();

    protected FieldBasedInputDialog getDialog() {
        return fDialog;
    }

    protected String getInitialValue() {
        return fInitialValue;
    }

    protected String getLabelText() {
        return fLabelText;
    }

    protected DialogFieldValidator getValidator() {
        return fValidator;
    }

    public void setValidator(DialogFieldValidator validator) {
        fValidator = validator;
    }

    protected Button createButton(Composite parent, int id, String label, boolean defaultButton) {
        // increment the number of columns in the button bar
        ((GridLayout) parent.getLayout()).numColumns++;
        Button button = new Button(parent, SWT.PUSH);
        button.setText(label);
        button.setFont(JFaceResources.getDialogFont());
        button.setData(new Integer(id));

        setButtonLayoutData(button);
        return button;
    }

    protected void setButtonLayoutData(Button button) {
        GridData data = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
        int widthHint = getDialog().convertHorizontalDLUsToPixels(IDialogConstants.BUTTON_WIDTH);
        Point minSize = button.computeSize(SWT.DEFAULT, SWT.DEFAULT, true);
        data.widthHint = Math.max(widthHint, minSize.x);
        button.setLayoutData(data);
    }

}