net.bpelunit.toolsupport.editors.wizards.components.DataComponent.java Source code

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Here is the source code for net.bpelunit.toolsupport.editors.wizards.components.DataComponent.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.toolsupport.editors.wizards.components;

import java.util.ArrayList;
import java.util.List;

import net.bpelunit.framework.xml.suite.XMLTestSuite;
import net.bpelunit.toolsupport.editors.BPELUnitEditor;
import net.bpelunit.toolsupport.editors.wizards.ActivityWizard;
import net.bpelunit.toolsupport.editors.wizards.fields.DialogField;
import net.bpelunit.toolsupport.editors.wizards.pages.ActivityWizardPage;
import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.wizard.IWizardPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.FontMetrics;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Shell;

/**
 * A data component is a graphical widget used to display and edit data. It may be added to wizard
 * pages to be displayed in wizards.
 * 
 * @version $Id$
 * @author Philip Mayer
 * 
 */
public abstract class DataComponent {

    private List<IComponentListener> fListeners;
    private FontMetrics fFontMetrics;
    private IWizardPage fWizardPage;

    public DataComponent(IWizardPage page, FontMetrics metrics) {
        fWizardPage = page;
        fFontMetrics = metrics;
        fListeners = new ArrayList<IComponentListener>();
    }

    public void addComponentListener(IComponentListener listener) {
        fListeners.add(listener);
    }

    public void removeComponentListener(IComponentListener listener) {
        fListeners.remove(listener);
    }

    protected void fireValueChanged(DialogField field) {
        for (IComponentListener listener : fListeners) {
            listener.valueChanged(field);
        }
    }

    protected int getMaxFieldWidth() {
        return Dialog.convertWidthInCharsToPixels(fFontMetrics, 40);
    }

    protected Group createGroup(Composite composite, String title, int nColumns, GridData gd) {
        Group operationGroup = new Group(composite, SWT.NULL);
        operationGroup.setText(title);

        GridLayout layout = new GridLayout();
        layout.numColumns = nColumns;
        operationGroup.setLayout(layout);

        gd.horizontalSpan = 4;
        operationGroup.setLayoutData(gd);
        return operationGroup;
    }

    public abstract Composite createControls(Composite composite, int nColumns);

    protected FontMetrics getFontMetrics() {
        return fFontMetrics;
    }

    protected BPELUnitEditor getEditor() {
        return getWizard().getEditor();
    }

    protected XMLTestSuite getTestSuite() {
        return getEditor().getTestSuite();
    }

    protected ActivityWizardPage getWizardPage() {
        return (ActivityWizardPage) fWizardPage;
    }

    protected ActivityWizard getWizard() {
        return (ActivityWizard) fWizardPage.getWizard();
    }

    protected Shell getShell() {
        return fWizardPage.getControl().getShell();
    }
}