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/*******************************************************************************
 * Copyright (c) 2006 IBM Corporation.
 * 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 - Jeff Briggs, Henry Hughes, Ryan Morse
 *******************************************************************************/

package org.eclipse.linuxtools.internal.systemtap.graphing.ui.wizards.filter;

import org.eclipse.jface.wizard.IWizardPage;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.linuxtools.internal.systemtap.graphing.ui.Localization;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.FormAttachment;
import org.eclipse.swt.layout.FormData;
import org.eclipse.swt.layout.FormLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.ui.forms.widgets.ColumnLayout;



public class SelectFilterWizardPage extends WizardPage {
    public SelectFilterWizardPage() {
        super("selectFilter"); //$NON-NLS-1$
        setTitle(Localization.getString("SelectFilterWizardPage.SelectFilter")); //$NON-NLS-1$
        filterID = ""; //$NON-NLS-1$
        btnFilters = null;
        buttonListener = new ButtonSelectionListener();
    }

    @Override
    public void createControl(Composite parent) {
        wizard = (SelectFilterWizard)super.getWizard();

        Composite comp = new Composite(parent, SWT.NULL);
        comp.setLayout(new FormLayout());
        FormData data1 = new FormData();
        data1.left = new FormAttachment(0, 0);
        data1.top = new FormAttachment(0, 0);
        data1.right = new FormAttachment(40, 0);
        data1.bottom = new FormAttachment(100, 0);

        Composite cmpFilterOpts = new Composite(comp, SWT.NONE);
        cmpFilterOpts.setLayoutData(data1);
        ColumnLayout colLayout = new ColumnLayout();
        colLayout.maxNumColumns = 1;
        cmpFilterOpts.setLayout(colLayout);

        btnFilters = new Button[AvailableFilterTypes.FILTER_IDS.length];
        for(int i=0; i<btnFilters.length; i++) {
            btnFilters[i] = new Button(cmpFilterOpts, SWT.NONE);
            btnFilters[i].setText(AvailableFilterTypes.getFilterName(AvailableFilterTypes.FILTER_IDS[i]));
            btnFilters[i].addSelectionListener(buttonListener);
            btnFilters[i].setData(AvailableFilterTypes.FILTER_IDS[i]);
        }

        FormData data2 = new FormData();
        data2.left = new FormAttachment(cmpFilterOpts);
        data2.top = new FormAttachment(0, 0);
        data2.right = new FormAttachment(100, 0);
        data2.bottom = new FormAttachment(100, 0);

        lblDesc = new Label(comp, SWT.WRAP);
        lblDesc.setLayoutData(data2);
        setControl(comp);
    }

    @Override
    public IWizardPage getNextPage() {
        return AvailableFilterTypes.getFilterWizardPage(filterID);
    }

    @Override
    public boolean canFlipToNextPage() {
        return (filterID.length() > 0);
    }

    @Override
    public void dispose() {
        super.dispose();
        if(null != btnFilters) {
            for(int i=0; i<btnFilters.length; i++) {
                btnFilters[i].removeSelectionListener(buttonListener);
                btnFilters[i].dispose();
                btnFilters[i] = null;
            }
        }
        btnFilters = null;
        lblDesc = null;
    }

    private class ButtonSelectionListener extends SelectionAdapter {

        @Override
        public void widgetSelected(SelectionEvent e) {
            if(e.widget instanceof Button) {
                Button target = (Button)e.widget;

                for(int i=0; i<btnFilters.length; i++) {
                    if(target == btnFilters[i]) {
                        filterID = btnFilters[i].getData().toString();
                        lblDesc.setText(AvailableFilterTypes.getFilterName(filterID) + "\n\n" + //$NON-NLS-1$
                                        AvailableFilterTypes.getFilterDescription(filterID));
                        wizard.getContainer().updateButtons();
                    }
                }
            }
        }
    }

    private Button[] btnFilters;
    private Label lblDesc;
    private String filterID;
    private SelectFilterWizard wizard;
    private ButtonSelectionListener buttonListener;
}

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