/**
 * @see org.eclipse.nebula.widgets.opal.preferencewindow.widgets.PWWidget#build(org.eclipse.swt.widgets.Composite)
 */
@Override
public Control build(final Composite parent) {
	buildLabel(parent, GridData.CENTER);
	final Scale scale = new Scale(parent, SWT.HORIZONTAL);
	addControl(scale);
	scale.setIncrement(this.increment);
	scale.setMinimum(this.min);
	scale.setMaximum(this.max);
	final Integer originalValue = (Integer) PreferenceWindow.getInstance().getValueFor(getPropertyKey());
	scale.setSelection(originalValue.intValue());

	scale.addListener(SWT.Modify, new Listener() {
		@Override
		public void handleEvent(final Event event) {
			PreferenceWindow.getInstance().setValue(getPropertyKey(), Integer.valueOf(scale.getSelection()));
		}
	});

	return scale;
}
 

private void renderTransparency(final Shell shell) {
	Group group = new Group(shell, SWT.NONE);
	group.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false, 6, 1));
	group.setLayout(new GridLayout(1, false));
	group.setText("Transparency");
	final Scale transparencySlider = new Scale(group, SWT.HORIZONTAL);
	transparencySlider.setMinimum(20);
	transparencySlider.setMaximum(100);
	transparencySlider.setPageIncrement(90);
	transparencySlider.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
	transparencySlider.setSelection(100);
	transparencySlider.addListener(SWT.Selection, new Listener() {

		@Override
		public void handleEvent(Event event) {
			shell.setAlpha(255 * transparencySlider.getSelection() / 100);
		}
	});
}
 

public IntValue(Composite parent, int initialValue) {
	inputField = new Text(parent, SWT.BORDER | SWT.SINGLE);
	outputField = new Label(parent, SWT.NONE);
	scale = new Scale(parent, SWT.HORIZONTAL);

	inputField.setText(Integer.toString(initialValue));
	outputField.setText(msgForValue(initialValue));
	scale.setMinimum(0);
	scale.setMaximum(100);
	scale.setSelection(initialValue);

	Layouts.setGrid(parent);
	Layouts.setGridData(inputField).grabHorizontal();
	Layouts.setGridData(outputField).grabHorizontal();
	Layouts.setGridData(scale).grabHorizontal();
}
 

@Test
public void testControl() {
	InteractiveTest.testCoat("Should show the YCbCr plane at various values of Y", cmp -> {
		Layouts.setGrid(cmp);

		Scale scale = new Scale(cmp, SWT.HORIZONTAL);
		scale.setMinimum(0);
		scale.setMaximum(255);
		scale.setSelection(128);
		Layouts.setGridData(scale).grabHorizontal();

		ColorPicker colors = new ColorPicker(cmp);
		Layouts.setGridData(colors).grabAll();

		scale.addListener(SWT.Selection, e -> {
			colors.setY(scale.getSelection());
		});
	});
}
 

public static void main (String [] args) {
    Display display = new Display ();
    Shell shell = new Shell (display);
    shell.setLayout(new GridLayout());

    PGroup group = new PGroup(shell, SWT.SMOOTH);
    group.setText("Example");
    
//  Optionally, change strategy and toggle
//  group.setStrategy(new FormGroupStrategy());
//  group.setToggleRenderer(new TwisteToggleRenderer());
    
    group.setLayout(new GridLayout());
    
    Label label = new Label(group,SWT.NONE);
    label.setText("Contents");
    Button button = new Button(group,SWT.PUSH);
    button.setText("Contents");
    Scale scale = new Scale(group,SWT.HORIZONTAL);
    
    
    shell.setSize(200,200);
    shell.open ();
    while (!shell.isDisposed()) {
        if (!display.readAndDispatch ()) display.sleep ();
    }
    display.dispose ();
}
 

@Override
protected void createUI(Composite parent) {
	GridLayout layout = new GridLayout(1, false);
	layout.marginWidth = 0;
	layout.marginHeight = 0;
	this.setLayout(layout);

	pageScale = new Scale(parent, SWT.READ_ONLY);
	pageScale.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

	pageScale.addSelectionListener(this);
}
 

private void createRankGroup(Composite parent) {
    Composite prioGroup = new Composite(parent, SWT.NONE);
    prioGroup.setLayout(new GridLayout(2, false));

    Label minRankLabel = new Label(prioGroup, SWT.NONE);
    minRankLabel.setText(getMessage("property.minRank") + System.getProperty("line.separator")
            + getMessage("property.minRank.line2"));
    minRankLabel.setLayoutData(new GridData(SWT.BEGINNING, SWT.CENTER, false, false));

    minRankSlider = new Scale(prioGroup, SWT.DROP_DOWN | SWT.READ_ONLY);
    minRankSlider.setLayoutData(new GridData(SWT.BEGINNING, SWT.CENTER, true, false));
    minRankSlider.addSelectionListener(new SelectionAdapter() {
        @Override
        public void widgetSelected(SelectionEvent event) {
            int rank = minRankSlider.getSelection();
            getCurrentProps().getFilterSettings().setMinRank(rank);
            updateRankValueLabel();
        }
    });
    minRankSlider.setMinimum(BugRanker.VISIBLE_RANK_MIN);
    minRankSlider.setMaximum(BugRanker.VISIBLE_RANK_MAX);
    minRankSlider.setSelection(getCurrentProps().getFilterSettings().getMinRank());
    minRankSlider.setIncrement(1);
    minRankSlider.setPageIncrement(5);
    Label dummyLabel = new Label(prioGroup, SWT.NONE);
    dummyLabel.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, false, false));

    rankValueLabel = new Label(prioGroup, SWT.NONE);
    rankValueLabel.setLayoutData(new GridData(SWT.CENTER, SWT.CENTER, true, false));
    updateRankValueLabel();
}
 

public void showShell() {
	if( isShellDisposed() ){
		this.shell = new Shell(this.getControl().getShell(), SWT.NO_TRIM );
		this.shell.setVisible(false);
		this.shell.setLayout(getGridLayout());
		
		this.composite = new Composite(this.shell, SWT.BORDER);
		this.composite.setLayout(getGridLayout());
		this.composite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
		
		this.scale = new Scale(this.composite, SWT.VERTICAL );
		this.scale.setMaximum(this.maximum);
		this.scale.setMinimum(this.minimum);
		this.scale.setIncrement(this.increment);
		this.scale.setPageIncrement(this.increment * 3);
		this.scale.setLayoutData(getScaleLayoutData());
		this.setValueToScale();
		
		this.scale.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent event) {
				SWTScaleKnob.this.getValueFromScale();
				SWTScaleKnob.this.selectionListener.widgetSelected(event);
			}
		});
		
		this.shell.pack();
		this.moveShell();
		this.shell.setVisible(true);
	}
}
 

public XkcdColorPicker(Composite parent, RGB initRGB) {
	super(new Composite(parent, SWT.NONE));
	RGB initYCbCr = ColorPicker.toYCbCr(initRGB);

	// create a scale and bind it to an RxBox<Integer>
	RxBox<Integer> luminance = RxBox.of(initYCbCr.red);

	// colorpanel in the center
	ColorPicker cbcrPanel = new ColorPicker(wrapped);
	Rx.subscribe(luminance, cbcrPanel::setY);

	// controls at the right
	Composite rightCmp = new Composite(wrapped, SWT.NONE);

	// scale below
	Scale scale = new Scale(wrapped, SWT.HORIZONTAL);
	scale.setMinimum(0);
	scale.setMaximum(255);
	Rx.subscribe(luminance, scale::setSelection);
	scale.addListener(SWT.Selection, e -> {
		luminance.set(scale.getSelection());
	});

	Layouts.setGrid(wrapped).numColumns(2);
	Layouts.setGridData(cbcrPanel).grabAll();
	Layouts.setGridData(rightCmp).grabVertical().verticalSpan(2);
	Layouts.setGridData(scale).grabHorizontal();

	// populate the bottom
	Layouts.setGrid(rightCmp).margin(0);
	XkcdColors.Lookup xkcdLookup = new XkcdColors.Lookup(rightCmp);

	Group hoverGrp = new Group(rightCmp, SWT.SHADOW_ETCHED_IN);
	hoverGrp.setText("Hover");
	createGroup(hoverGrp, cbcrPanel.rxMouseMove(), xkcdLookup);

	Group clickGrp = new Group(rightCmp, SWT.SHADOW_ETCHED_IN);
	clickGrp.setText("Click");
	createGroup(clickGrp, cbcrPanel.rxMouseDown(), xkcdLookup);
}
 

private void createScale(Composite composite) {
	Scale scale = new Scale(composite, SWT.NONE);
	scale.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
	double[] values = new double[] { 0.25, 0.5, 0.75, 1.0, 1.5,
			2.0, 2.5, 3.0, 4.0, 5.0, 10.0, 20.0 };
	scale.setIncrement(9);
	scale.setMinimum(0);
	scale.setMaximum(99);
	Controls.onSelect(scale, (e) -> {
		ZoomManager zoom = part.getZoomManager();
		zoom.setZoom(values[scale.getSelection() / 9]);
	});
	scale.setSelection(33);
}
 

public static void main (String [] args) {
    Display display = new Display ();
    Shell shell = new Shell (display);
    shell.setLayout(new GridLayout());

    //Set the shell background to something different
    shell.setBackground(display.getSystemColor(SWT.COLOR_RED));
    
    //Tell the shell to give its children the same background color or image
    shell.setBackgroundMode(SWT.INHERIT_DEFAULT);
    
    //Optionally trying creating a patterned image for the shell background
//    final Image backImage = new Image(display,10,10);
//    GC gc = new GC(backImage);
//    gc.drawLine(0,0,9,9);
//    gc.dispose();
//    shell.addDisposeListener(new DisposeListener() {
//		public void widgetDisposed(DisposeEvent e) {
//			backImage.dispose();
//		}	
//	});
//    shell.setBackgroundImage(backImage);
    
    PGroup group = new PGroup(shell, SWT.SMOOTH);
    group.setText("Example");
    group.setLayout(new FillLayout());    
    group.setBackground(display.getSystemColor(SWT.COLOR_WHITE));
    
    Composite groupClient = new Composite(group,SWT.NONE);
    groupClient.setBackground(display.getSystemColor(SWT.COLOR_WHITE));
    
    groupClient.setLayout(new GridLayout());
    
    Label label = new Label(groupClient,SWT.NONE);
    label.setText("Contents");
    Button button = new Button(groupClient,SWT.PUSH);
    button.setText("Contents");
    Scale scale = new Scale(groupClient,SWT.HORIZONTAL);
    
    
    shell.setSize(200,200);
    shell.open ();
    while (!shell.isDisposed()) {
        if (!display.readAndDispatch ()) display.sleep ();
    }
    display.dispose ();
}
 

public SpinnerWithScale(final Spinner spinner, final Scale scale, final int diff) {
    this.spinner = spinner;
    this.scale = scale;
    this.diff = diff;
}
 

public SWTScale(SWTContainer<? extends Composite> parent, int orientation) {
	super(new Scale(parent.getControl(), SWT.BORDER | orientation), parent);
	
	this.selectionListener = new SWTSelectionListenerManager(this);
}
 

public SpinnerWithScale(Spinner spinner, Scale scale, int diff) {
    this.spinner = spinner;
    this.scale = scale;
    this.diff = diff;
}
 

/**
 * Create the composite.
 * @param parent
 * @param style
 */
public LegendPageBar(Composite parent, int style) {
	super(parent, style);
	setLayout(new GridLayout(2, false));
	
	lblLegend = new Label(this, SWT.NONE);
	lblLegend.setText("Legend ");
	
	btnEnableLegend = new Button(this, SWT.CHECK);
	btnEnableLegend.setText("Enable Legend");
	
	Label lblBackgroundColor = new Label(this, SWT.NONE);
	GridData gd_lblBackgroundColor = new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1);
	gd_lblBackgroundColor.widthHint = 150;
	lblBackgroundColor.setLayoutData(gd_lblBackgroundColor);
	lblBackgroundColor.setText("Background Color");
	
	labelColorShow = new Label(this, SWT.BORDER);
	GridData gd_labelColorShow = new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1);
	gd_labelColorShow.widthHint = 100;
	labelColorShow.setLayoutData(gd_labelColorShow);
	labelColorShow.setText(" ");
	labelColorShow.setBackground(PageSupport.getColor(parent, 0));
	labelColorShow.addMouseListener(this);
	
	Label lblOutline = new Label(this, SWT.NONE);
	lblOutline.setText("Outline Style");
	
	comboOutline = new Combo(this, SWT.READ_ONLY);
	comboOutline.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, true, false, 1, 1));
	comboOutline.add("None");
	comboOutline.add("Dashed");
	comboOutline.add("Dash Dotted");
	comboOutline.add("Dotted");
	comboOutline.add("Solid");
	comboOutline.select(0);
	
	lblMaxPercent = new Label(this, SWT.NONE);
	lblMaxPercent.setText("Max. Percent");
	
	scale = new Scale(this, SWT.NONE);
	scale.setIncrement(2);
	GridData gd_scale = new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1);
	gd_scale.widthHint = 309;
	scale.setLayoutData(gd_scale);
	scale.setPageIncrement(2);
	scale.setMaximum(50);
	scale.setSelection(10);
	scale.addSelectionListener(this);
	
	Label lblPosition = new Label(this, SWT.NONE);
	lblPosition.setText("Position");
	
	comboPosition = new Combo(this, SWT.READ_ONLY);
	comboPosition.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, true, false, 1, 1));
	comboPosition.add("Right");
	comboPosition.add("Left");
	comboPosition.add("Below");
	comboPosition.add("Top");
	comboPosition.select(0);		

	loadSettings();
}
 

/**
 * Create the composite.
 * @param parent
 * @param style
 */
public LegendPagePie(Composite parent, int style) {
	super(parent, style);
	setLayout(new GridLayout(2, false));
	
	lblLegend = new Label(this, SWT.NONE);
	lblLegend.setText("Legend");
	
	btnEnableLegend = new Button(this, SWT.CHECK);
	btnEnableLegend.setText("Enable Legend");
	
	Label lblBackgroundColor = new Label(this, SWT.NONE);
	GridData gd_lblBackgroundColor = new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1);
	gd_lblBackgroundColor.widthHint = 150;
	lblBackgroundColor.setLayoutData(gd_lblBackgroundColor);
	lblBackgroundColor.setText("Background Color");
	
	labelColorShow = new Label(this, SWT.BORDER);
	GridData gd_labelColorShow = new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1);
	gd_labelColorShow.widthHint = 100;
	labelColorShow.setLayoutData(gd_labelColorShow);
	labelColorShow.setText(" ");
	labelColorShow.setBackground(PageSupport.getColor(parent, 0));
	labelColorShow.addMouseListener(this);
	
	Label lblOutline = new Label(this, SWT.NONE);
	lblOutline.setText("Outline Style");
	
	comboOutline = new Combo(this, SWT.READ_ONLY);
	comboOutline.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, true, false, 1, 1));
	comboOutline.add("None");
	comboOutline.add("Dashed");
	comboOutline.add("Dash Dotted");
	comboOutline.add("Dotted");
	comboOutline.add("Solid");
	comboOutline.select(0);
	
	lblMaxPercent = new Label(this, SWT.NONE);
	lblMaxPercent.setText("Max. Percent");
	
	scale = new Scale(this, SWT.NONE);
	scale.setIncrement(2);
	GridData gd_scale = new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1);
	gd_scale.widthHint = 309;
	scale.setLayoutData(gd_scale);
	scale.setPageIncrement(2);
	scale.setMaximum(50);
	scale.setSelection(10);
	scale.addSelectionListener(this);
	
	Label lblPosition = new Label(this, SWT.NONE);
	lblPosition.setText("Position");
	
	comboPosition = new Combo(this, SWT.READ_ONLY);
	comboPosition.setLayoutData(new GridData(SWT.LEFT, SWT.CENTER, true, false, 1, 1));
	comboPosition.add("Right");
	comboPosition.add("Left");
	comboPosition.add("Below");
	comboPosition.add("Top");
	comboPosition.select(0);		
	
	

	loadSettings();
}
 

/**
 * Create the controls that compose the console test.
 * 
 */
protected void createControls(IHierarchicalJaretTableModel hierarchicalModel) {
    GridLayout gl = new GridLayout();
    gl.numColumns = 1;
    _shell.setLayout(gl);

    GridData gd = new GridData(GridData.FILL_BOTH);

    _jt = new JaretTable(_shell, SWT.V_SCROLL | SWT.H_SCROLL);
    _jt.setLayoutData(gd);

    IHierarchicalJaretTableModel hmodel = hierarchicalModel;

    if (hierarchicalModel == null) {

        ITableNode root = new DummyTableNode("tn1", "tn1", "Root", "This the root node");
        ITableNode r1 = new DummyTableNode("tn11", "tn12", "1", "Child 1 of the root");
        ITableNode r2 = new DummyTableNode("tn12", "tn12", "2", "Child 2 of the root");
        ITableNode r3 = new DummyTableNode("tn13", "tn13", "3", "Child 3 of the root");
        root.addNode(r1);
        root.addNode(r2);
        root.addNode(r3);

        r1.addNode(new DummyTableNode("tn111", "tn111", "1", "A second level child"));
        r1.addNode(new DummyTableNode("tn112", "tn112", "2", "Another second level child"));

        ITableNode n1 = new DummyTableNode("tn131", "tn131", "1", "A second level child");
        r3.addNode(n1);
        ITableNode n2 = new DummyTableNode("tn132", "tn132", "2", "Another second level child");
        r3.addNode(n2);

        n1.addNode(new DummyTableNode("tn1311", "tn1311", "1", "A third level child"));
        n1.addNode(new DummyTableNode("tn1312", "tn1312", "2", "Another third level child"));

        DefaultHierarchicalTableModel dhmodel = new DefaultHierarchicalTableModel(root);
        hmodel = dhmodel;

        if (SUPPORT_DND) {
            // init the simple drag and drop handling
            initDND(_jt, _shell);
        }
    }

    _jt.setTableModel(hmodel);
    StdHierarchicalTableModel model = (StdHierarchicalTableModel) _jt.getTableModel();
    IColumn hcol = new HierarchyColumn();
    // create and setup hierarchy renderer
    final TableHierarchyRenderer hierarchyRenderer = new TableHierarchyRenderer();
    hierarchyRenderer.setLabelProvider(new LabelProvider());
    hierarchyRenderer.setDrawIcons(true);
    hierarchyRenderer.setDrawLabels(true);
    _jt.registerCellRenderer(hcol, hierarchyRenderer);
    model.addColumn(hcol);

    model.addColumn(new PropCol("b1", "column 1", "B1"));
    model.addColumn(new PropCol("t1", "column 2", "T1"));
    model.addColumn(new PropCol("t2", "column 3", "T2"));
    model.addColumn(new PropCol("t3", "column 4", "T3"));

    JaretTableActionFactory af = new JaretTableActionFactory();

    MenuManager mm = new MenuManager();
    mm.add(af.createStdAction(_jt, JaretTableActionFactory.ACTION_CONFIGURECOLUMNS));
    _jt.setHeaderContextMenu(mm.createContextMenu(_jt));

    MenuManager rm = new MenuManager();
    rm.add(af.createStdAction(_jt, JaretTableActionFactory.ACTION_OPTROWHEIGHT));
    rm.add(af.createStdAction(_jt, JaretTableActionFactory.ACTION_OPTALLROWHEIGHTS));
    _jt.setRowContextMenu(rm.createContextMenu(_jt));

    TableControlPanel ctrlPanel = new TableControlPanel(_shell, SWT.NULL, _jt);

    Label l = new Label(_shell, SWT.NONE);
    l.setText("Level width:");
    final Scale levelWidthScale = new Scale(_shell, SWT.HORIZONTAL);
    levelWidthScale.setMaximum(40);
    levelWidthScale.setMinimum(0);
    levelWidthScale.addSelectionListener(new SelectionAdapter() {
        public void widgetSelected(SelectionEvent ev) {
            int val = levelWidthScale.getSelection();
            hierarchyRenderer.setLevelWidth(val);
            _jt.redraw();
        }
    });

}
 

/**
 * Create the controls that compose the console test.
 * 
 */
protected void createControls(IHierarchicalJaretTableModel hierarchicalModel) {
    GridLayout gl = new GridLayout();
    gl.numColumns = 1;
    _shell.setLayout(gl);

    GridData gd = new GridData(GridData.FILL_BOTH);

    _jt = new JaretTable(_shell, SWT.V_SCROLL | SWT.H_SCROLL);
    _jt.setLayoutData(gd);

    IHierarchicalJaretTableModel hmodel = hierarchicalModel;

    if (hierarchicalModel == null) {

        ITableNode root = new DummyTableNode("tn1", "tn1", "Root", "This the root node");
        ITableNode r1 = new DummyTableNode("tn11", "tn12", "1", "Child 1 of the root");
        ITableNode r2 = new DummyTableNode("tn12", "tn12", "2", "Child 2 of the root");
        ITableNode r3 = new DummyTableNode("tn13", "tn13", "3", "Child 3 of the root");
        root.addNode(r1);
        root.addNode(r2);
        root.addNode(r3);

        r1.addNode(new DummyTableNode("tn111", "tn111", "1", "A second level child"));
        r1.addNode(new DummyTableNode("tn112", "tn112", "2", "Another second level child"));

        ITableNode n1 = new DummyTableNode("tn131", "tn131", "1", "A second level child");
        r3.addNode(n1);
        ITableNode n2 = new DummyTableNode("tn132", "tn132", "2", "Another second level child");
        r3.addNode(n2);

        n1.addNode(new DummyTableNode("tn1311", "tn1311", "1", "A third level child"));
        n1.addNode(new DummyTableNode("tn1312", "tn1312", "2", "Another third level child"));

        DefaultHierarchicalTableModel dhmodel = new DefaultHierarchicalTableModel(root);
        hmodel = dhmodel;

        if (SUPPORT_DND) {
            // init the simple drag and drop handling
            initDND(_jt, _shell);
        }
    }

    _jt.setTableModel(hmodel);
    StdHierarchicalTableModel model = (StdHierarchicalTableModel) _jt.getTableModel();
    IColumn hcol = new HierarchyColumn();
    // create and setup hierarchy renderer
    final TableHierarchyRenderer hierarchyRenderer = new TableHierarchyRenderer();
    hierarchyRenderer.setLabelProvider(new LabelProvider());
    hierarchyRenderer.setDrawIcons(true);
    hierarchyRenderer.setDrawLabels(true);
    _jt.registerCellRenderer(hcol, hierarchyRenderer);
    model.addColumn(hcol);

    model.addColumn(new PropCol("b1", "column 1", "B1"));
    model.addColumn(new PropCol("t1", "column 2", "T1"));
    model.addColumn(new PropCol("t2", "column 3", "T2"));
    model.addColumn(new PropCol("t3", "column 4", "T3"));

    JaretTableActionFactory af = new JaretTableActionFactory();

    MenuManager mm = new MenuManager();
    mm.add(af.createStdAction(_jt, JaretTableActionFactory.ACTION_CONFIGURECOLUMNS));
    _jt.setHeaderContextMenu(mm.createContextMenu(_jt));

    MenuManager rm = new MenuManager();
    rm.add(af.createStdAction(_jt, JaretTableActionFactory.ACTION_OPTROWHEIGHT));
    rm.add(af.createStdAction(_jt, JaretTableActionFactory.ACTION_OPTALLROWHEIGHTS));
    _jt.setRowContextMenu(rm.createContextMenu(_jt));

    TableControlPanel ctrlPanel = new TableControlPanel(_shell, SWT.NULL, _jt);

    Label l = new Label(_shell, SWT.NONE);
    l.setText("Level width:");
    final Scale levelWidthScale = new Scale(_shell, SWT.HORIZONTAL);
    levelWidthScale.setMaximum(40);
    levelWidthScale.setMinimum(0);
    levelWidthScale.addSelectionListener(new SelectionAdapter() {
        public void widgetSelected(SelectionEvent ev) {
            int val = levelWidthScale.getSelection();
            hierarchyRenderer.setLevelWidth(val);
            _jt.redraw();
        }
    });

}
 

@Override
protected Control createContents(final Composite parent) {
	FormToolkit toolkit = new FormToolkit(Display.getCurrent());
	ScrolledForm scrolledForm = toolkit.createScrolledForm(parent);
	Composite body = scrolledForm.getBody();
	body.setLayout(new FillLayout());
	toolkit.paintBordersFor(body);

	SashForm sashForm = new SashForm(body, SWT.VERTICAL);
	toolkit.adapt(sashForm, true, true);

	Section categorySection = toolkit
			.createSection(sashForm, ExpandableComposite.NO_TITLE
					| ExpandableComposite.EXPANDED);
	categorySection.setText("");
	Composite composite = toolkit.createComposite(categorySection,
			SWT.NONE);
	composite.setLayout(new GridLayout());
	categorySection.setClient(composite);
	toolkit.paintBordersFor(composite);
	final Scale scale = new Scale(composite, SWT.NONE);
	scale.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
	final double[] values = GraphConfig.ZOOM_LEVELS;
	final int increment = 100 / (values.length - 1);
	scale.setIncrement(increment);
	scale.setMinimum(0);
	scale.setMaximum(100);
	Controls.onSelect(scale, (e) -> {
		zoomManager.setZoom(values[scale.getSelection() / increment]);
	});
	scale.setSelection(increment * (values.length - 1) / 2);
	Canvas canvas = new Canvas(composite, SWT.BORDER);
	canvas.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
	lws = new LightweightSystem(canvas);
	thumbnail = new ScrollableThumbnail(port);
	thumbnail.setSource(figure);
	lws.setContents(thumbnail);
	disposeListener = new DisposeListener() {

		@Override
		public void widgetDisposed(final DisposeEvent e) {
			if (thumbnail != null) {
				thumbnail.deactivate();
				thumbnail = null;
			}
			if (control != null && !control.isDisposed())
				control.removeDisposeListener(disposeListener);
			close();
		}
	};
	control.addDisposeListener(disposeListener);
	return super.createContents(parent);
}
 

public static void onSelect(Scale scale, Consumer<SelectionEvent> consumer) {
	scale.addSelectionListener(selectionListener(consumer));
}
 

public SpinnerWithScale(Spinner spinner, Scale scale, int diff) {
	this.spinner = spinner;
	this.scale = scale;
	this.diff = diff;
}