From: Johannes Dahlström <johannesd@vaadin.com>
Date: Tue, 12 Jun 2012 13:26:36 +0000 (+0300)
Subject: Merge commit '42dff'
X-Git-Tag: 7.0.0.alpha3~127
X-Git-Url: https://source.dussan.org/?a=commitdiff_plain;h=e364b76916cbf69cb3e19d5be071bcc66a69da56;p=vaadin-framework.git

Merge commit '42dff'
---

e364b76916cbf69cb3e19d5be071bcc66a69da56
diff --cc src/com/vaadin/terminal/gwt/client/ui/splitpanel/VAbstractSplitPanel.java
index 72e63cedca,0000000000..84b1b1d979
mode 100644,000000..100644
--- a/src/com/vaadin/terminal/gwt/client/ui/splitpanel/VAbstractSplitPanel.java
+++ b/src/com/vaadin/terminal/gwt/client/ui/splitpanel/VAbstractSplitPanel.java
@@@ -1,767 -1,0 +1,767 @@@
 +/*
 +@VaadinApache2LicenseForJavaFiles@
 + */
 +
 +package com.vaadin.terminal.gwt.client.ui.splitpanel;
 +
 +import java.util.List;
 +
 +import com.google.gwt.dom.client.Node;
 +import com.google.gwt.dom.client.Style;
 +import com.google.gwt.event.dom.client.TouchCancelEvent;
 +import com.google.gwt.event.dom.client.TouchCancelHandler;
 +import com.google.gwt.event.dom.client.TouchEndEvent;
 +import com.google.gwt.event.dom.client.TouchEndHandler;
 +import com.google.gwt.event.dom.client.TouchMoveEvent;
 +import com.google.gwt.event.dom.client.TouchMoveHandler;
 +import com.google.gwt.event.dom.client.TouchStartEvent;
 +import com.google.gwt.event.dom.client.TouchStartHandler;
 +import com.google.gwt.event.shared.EventHandler;
 +import com.google.gwt.event.shared.GwtEvent;
 +import com.google.gwt.user.client.DOM;
 +import com.google.gwt.user.client.Element;
 +import com.google.gwt.user.client.Event;
 +import com.google.gwt.user.client.ui.ComplexPanel;
 +import com.google.gwt.user.client.ui.Widget;
 +import com.vaadin.terminal.gwt.client.ApplicationConnection;
 +import com.vaadin.terminal.gwt.client.BrowserInfo;
 +import com.vaadin.terminal.gwt.client.ComponentConnector;
 +import com.vaadin.terminal.gwt.client.ConnectorMap;
 +import com.vaadin.terminal.gwt.client.LayoutManager;
 +import com.vaadin.terminal.gwt.client.Util;
 +import com.vaadin.terminal.gwt.client.VConsole;
 +import com.vaadin.terminal.gwt.client.ui.TouchScrollDelegate;
 +import com.vaadin.terminal.gwt.client.ui.TouchScrollDelegate.TouchScrollHandler;
 +import com.vaadin.terminal.gwt.client.ui.VOverlay;
 +import com.vaadin.terminal.gwt.client.ui.splitpanel.VAbstractSplitPanel.SplitterMoveHandler.SplitterMoveEvent;
 +
 +public class VAbstractSplitPanel extends ComplexPanel {
 +
 +    private boolean enabled = false;
 +
 +    public static final String CLASSNAME = "v-splitpanel";
 +
 +    public static final int ORIENTATION_HORIZONTAL = 0;
 +
 +    public static final int ORIENTATION_VERTICAL = 1;
 +
 +    private static final int MIN_SIZE = 30;
 +
 +    private int orientation = ORIENTATION_HORIZONTAL;
 +
 +    Widget firstChild;
 +
 +    Widget secondChild;
 +
 +    private final Element wrapper = DOM.createDiv();
 +
 +    private final Element firstContainer = DOM.createDiv();
 +
 +    private final Element secondContainer = DOM.createDiv();
 +
 +    final Element splitter = DOM.createDiv();
 +
 +    private boolean resizing;
 +
 +    private boolean resized = false;
 +
 +    private int origX;
 +
 +    private int origY;
 +
 +    private int origMouseX;
 +
 +    private int origMouseY;
 +
 +    private boolean locked = false;
 +
 +    private boolean positionReversed = false;
 +
 +    List<String> componentStyleNames;
 +
 +    private Element draggingCurtain;
 +
 +    ApplicationConnection client;
 +
 +    boolean immediate;
 +
 +    /* The current position of the split handle in either percentages or pixels */
 +    String position;
 +
 +    String maximumPosition;
 +
 +    String minimumPosition;
 +
 +    private final TouchScrollHandler touchScrollHandler;
 +
 +    protected Element scrolledContainer;
 +
 +    protected int origScrollTop;
 +
 +    public VAbstractSplitPanel() {
 +        this(ORIENTATION_HORIZONTAL);
 +    }
 +
 +    public VAbstractSplitPanel(int orientation) {
 +        setElement(DOM.createDiv());
 +        switch (orientation) {
 +        case ORIENTATION_HORIZONTAL:
 +            setStyleName(CLASSNAME + "-horizontal");
 +            break;
 +        case ORIENTATION_VERTICAL:
 +        default:
 +            setStyleName(CLASSNAME + "-vertical");
 +            break;
 +        }
 +        // size below will be overridden in update from uidl, initial size
 +        // needed to keep IE alive
 +        setWidth(MIN_SIZE + "px");
 +        setHeight(MIN_SIZE + "px");
 +        constructDom();
 +        setOrientation(orientation);
 +        sinkEvents(Event.MOUSEEVENTS);
 +
 +        touchScrollHandler = TouchScrollDelegate.enableTouchScrolling(this,
 +                firstContainer, secondContainer);
 +
 +        addDomHandler(new TouchCancelHandler() {
 +            @Override
 +            public void onTouchCancel(TouchCancelEvent event) {
 +                // TODO When does this actually happen??
 +                VConsole.log("TOUCH CANCEL");
 +            }
 +        }, TouchCancelEvent.getType());
 +        addDomHandler(new TouchStartHandler() {
 +            @Override
 +            public void onTouchStart(TouchStartEvent event) {
 +                Node target = event.getTouches().get(0).getTarget().cast();
 +                if (splitter.isOrHasChild(target)) {
 +                    onMouseDown(Event.as(event.getNativeEvent()));
 +                }
 +            }
 +        }, TouchStartEvent.getType());
 +        addDomHandler(new TouchMoveHandler() {
 +            @Override
 +            public void onTouchMove(TouchMoveEvent event) {
 +                if (resizing) {
 +                    onMouseMove(Event.as(event.getNativeEvent()));
 +                }
 +            }
 +        }, TouchMoveEvent.getType());
 +        addDomHandler(new TouchEndHandler() {
 +            @Override
 +            public void onTouchEnd(TouchEndEvent event) {
 +                if (resizing) {
 +                    onMouseUp(Event.as(event.getNativeEvent()));
 +                }
 +            }
 +        }, TouchEndEvent.getType());
 +
 +    }
 +
 +    protected void constructDom() {
 +        DOM.appendChild(splitter, DOM.createDiv()); // for styling
 +        DOM.appendChild(getElement(), wrapper);
 +        DOM.setStyleAttribute(wrapper, "position", "relative");
 +        DOM.setStyleAttribute(wrapper, "width", "100%");
 +        DOM.setStyleAttribute(wrapper, "height", "100%");
 +
 +        DOM.appendChild(wrapper, secondContainer);
 +        DOM.appendChild(wrapper, firstContainer);
 +        DOM.appendChild(wrapper, splitter);
 +
 +        DOM.setStyleAttribute(splitter, "position", "absolute");
 +        DOM.setStyleAttribute(secondContainer, "position", "absolute");
 +
 +        setStylenames();
 +    }
 +
 +    private void setOrientation(int orientation) {
 +        this.orientation = orientation;
 +        if (orientation == ORIENTATION_HORIZONTAL) {
 +            DOM.setStyleAttribute(splitter, "height", "100%");
 +            DOM.setStyleAttribute(splitter, "top", "0");
 +            DOM.setStyleAttribute(firstContainer, "height", "100%");
 +            DOM.setStyleAttribute(secondContainer, "height", "100%");
 +        } else {
 +            DOM.setStyleAttribute(splitter, "width", "100%");
 +            DOM.setStyleAttribute(splitter, "left", "0");
 +            DOM.setStyleAttribute(firstContainer, "width", "100%");
 +            DOM.setStyleAttribute(secondContainer, "width", "100%");
 +        }
 +    }
 +
 +    @Override
 +    public boolean remove(Widget w) {
 +        boolean removed = super.remove(w);
 +        if (removed) {
 +            if (firstChild == w) {
 +                firstChild = null;
 +            } else {
 +                secondChild = null;
 +            }
 +        }
 +        return removed;
 +    }
 +
 +    void setLocked(boolean newValue) {
 +        if (locked != newValue) {
 +            locked = newValue;
 +            splitterSize = -1;
 +            setStylenames();
 +        }
 +    }
 +
 +    void setPositionReversed(boolean reversed) {
 +        if (positionReversed != reversed) {
 +            if (orientation == ORIENTATION_HORIZONTAL) {
 +                DOM.setStyleAttribute(splitter, "right", "");
 +                DOM.setStyleAttribute(splitter, "left", "");
 +            } else if (orientation == ORIENTATION_VERTICAL) {
 +                DOM.setStyleAttribute(splitter, "top", "");
 +                DOM.setStyleAttribute(splitter, "bottom", "");
 +            }
 +
 +            positionReversed = reversed;
 +        }
 +    }
 +
 +    /**
 +     * Converts given split position string (in pixels or percentage) to a
 +     * floating point pixel value.
 +     * 
 +     * @param pos
 +     * @return
 +     */
 +    private float convertToPixels(String pos) {
 +        float posAsFloat;
 +        if (pos.indexOf("%") > 0) {
 +            posAsFloat = Math.round(Float.parseFloat(pos.substring(0,
 +                    pos.length() - 1))
 +                    / 100
 +                    * (orientation == ORIENTATION_HORIZONTAL ? getOffsetWidth()
 +                            : getOffsetHeight()));
 +        } else {
 +            posAsFloat = Float.parseFloat(pos.substring(0, pos.length() - 2));
 +        }
 +        return posAsFloat;
 +    }
 +
 +    /**
 +     * Converts given split position string (in pixels or percentage) to a float
 +     * percentage value.
 +     * 
 +     * @param pos
 +     * @return
 +     */
 +    private float convertToPercentage(String pos) {
 +        float posAsFloat = 0;
 +
 +        if (pos.indexOf("px") > 0) {
 +            int posAsInt = Integer.parseInt(pos.substring(0, pos.length() - 2));
 +            int offsetLength = orientation == ORIENTATION_HORIZONTAL ? getOffsetWidth()
 +                    : getOffsetHeight();
 +
 +            // 100% needs special handling
 +            if (posAsInt + getSplitterSize() >= offsetLength) {
 +                posAsInt = offsetLength;
 +            }
 +            // Reversed position
 +            if (positionReversed) {
 +                posAsInt = offsetLength - posAsInt - getSplitterSize();
 +            }
-             posAsFloat = ((float) posAsInt / (float) getOffsetWidth() * 100);
++            posAsFloat = ((float) posAsInt / (float) offsetLength * 100);
 +
 +        } else {
 +            posAsFloat = Float.parseFloat(pos.substring(0, pos.length() - 1));
 +        }
 +        return posAsFloat;
 +    }
 +
 +    /**
 +     * Returns the given position clamped to the range between current minimum
 +     * and maximum positions.
 +     * 
 +     * TODO Should this be in the connector?
 +     * 
 +     * @param pos
 +     *            Position of the splitter as a CSS string, either pixels or a
 +     *            percentage.
 +     * @return minimumPosition if pos is less than minimumPosition;
 +     *         maximumPosition if pos is greater than maximumPosition; pos
 +     *         otherwise.
 +     */
 +    private String checkSplitPositionLimits(String pos) {
 +        float positionAsFloat = convertToPixels(pos);
 +        float maximumAsFloat = convertToPixels(maximumPosition);
 +        float minimumAsFloat = convertToPixels(minimumPosition);
 +
 +        if (maximumAsFloat < positionAsFloat) {
 +            pos = maximumPosition;
 +        } else if (minimumAsFloat > positionAsFloat) {
 +            pos = minimumPosition;
 +        }
 +        return pos;
 +    }
 +
 +    /**
 +     * Converts given string to the same units as the split position is.
 +     * 
 +     * @param pos
 +     *            position to be converted
 +     * @return converted position string
 +     */
 +    private String convertToPositionUnits(String pos) {
 +        if (position.indexOf("%") != -1 && pos.indexOf("%") == -1) {
 +            // position is in percentage, pos in pixels
 +            pos = convertToPercentage(pos) + "%";
 +        } else if (position.indexOf("px") > 0 && pos.indexOf("px") == -1) {
 +            // position is in pixels and pos in percentage
 +            pos = convertToPixels(pos) + "px";
 +        }
 +
 +        return pos;
 +    }
 +
 +    void setSplitPosition(String pos) {
 +        if (pos == null) {
 +            return;
 +        }
 +
 +        pos = checkSplitPositionLimits(pos);
 +        if (!pos.equals(position)) {
 +            position = convertToPositionUnits(pos);
 +        }
 +
 +        // Convert percentage values to pixels
 +        if (pos.indexOf("%") > 0) {
 +            int size = orientation == ORIENTATION_HORIZONTAL ? getOffsetWidth()
 +                    : getOffsetHeight();
 +            float percentage = Float.parseFloat(pos.substring(0,
 +                    pos.length() - 1));
 +            pos = percentage / 100 * size + "px";
 +        }
 +
 +        String attributeName;
 +        if (orientation == ORIENTATION_HORIZONTAL) {
 +            if (positionReversed) {
 +                attributeName = "right";
 +            } else {
 +                attributeName = "left";
 +            }
 +        } else {
 +            if (positionReversed) {
 +                attributeName = "bottom";
 +            } else {
 +                attributeName = "top";
 +            }
 +        }
 +
 +        Style style = splitter.getStyle();
 +        if (!pos.equals(style.getProperty(attributeName))) {
 +            style.setProperty(attributeName, pos);
 +            updateSizes();
 +        }
 +    }
 +
 +    void updateSizes() {
 +        if (!isAttached()) {
 +            return;
 +        }
 +
 +        int wholeSize;
 +        int pixelPosition;
 +
 +        switch (orientation) {
 +        case ORIENTATION_HORIZONTAL:
 +            wholeSize = DOM.getElementPropertyInt(wrapper, "clientWidth");
 +            pixelPosition = DOM.getElementPropertyInt(splitter, "offsetLeft");
 +
 +            // reposition splitter in case it is out of box
 +            if ((pixelPosition > 0 && pixelPosition + getSplitterSize() > wholeSize)
 +                    || (positionReversed && pixelPosition < 0)) {
 +                pixelPosition = wholeSize - getSplitterSize();
 +                if (pixelPosition < 0) {
 +                    pixelPosition = 0;
 +                }
 +                setSplitPosition(pixelPosition + "px");
 +                return;
 +            }
 +
 +            DOM.setStyleAttribute(firstContainer, "width", pixelPosition + "px");
 +            int secondContainerWidth = (wholeSize - pixelPosition - getSplitterSize());
 +            if (secondContainerWidth < 0) {
 +                secondContainerWidth = 0;
 +            }
 +            DOM.setStyleAttribute(secondContainer, "width",
 +                    secondContainerWidth + "px");
 +            DOM.setStyleAttribute(secondContainer, "left",
 +                    (pixelPosition + getSplitterSize()) + "px");
 +
 +            LayoutManager layoutManager = LayoutManager.get(client);
 +            ConnectorMap connectorMap = ConnectorMap.get(client);
 +            if (firstChild != null) {
 +                ComponentConnector connector = connectorMap
 +                        .getConnector(firstChild);
 +                if (connector.isRelativeWidth()) {
 +                    layoutManager.reportWidthAssignedToRelative(connector,
 +                            pixelPosition);
 +                } else {
 +                    layoutManager.setNeedsMeasure(connector);
 +                }
 +            }
 +            if (secondChild != null) {
 +                ComponentConnector connector = connectorMap
 +                        .getConnector(secondChild);
 +                if (connector.isRelativeWidth()) {
 +                    layoutManager.reportWidthAssignedToRelative(connector,
 +                            secondContainerWidth);
 +                } else {
 +                    layoutManager.setNeedsMeasure(connector);
 +                }
 +            }
 +            break;
 +        case ORIENTATION_VERTICAL:
 +            wholeSize = DOM.getElementPropertyInt(wrapper, "clientHeight");
 +            pixelPosition = DOM.getElementPropertyInt(splitter, "offsetTop");
 +
 +            // reposition splitter in case it is out of box
 +            if ((pixelPosition > 0 && pixelPosition + getSplitterSize() > wholeSize)
 +                    || (positionReversed && pixelPosition < 0)) {
 +                pixelPosition = wholeSize - getSplitterSize();
 +                if (pixelPosition < 0) {
 +                    pixelPosition = 0;
 +                }
 +                setSplitPosition(pixelPosition + "px");
 +                return;
 +            }
 +
 +            DOM.setStyleAttribute(firstContainer, "height", pixelPosition
 +                    + "px");
 +            int secondContainerHeight = (wholeSize - pixelPosition - getSplitterSize());
 +            if (secondContainerHeight < 0) {
 +                secondContainerHeight = 0;
 +            }
 +            DOM.setStyleAttribute(secondContainer, "height",
 +                    secondContainerHeight + "px");
 +            DOM.setStyleAttribute(secondContainer, "top",
 +                    (pixelPosition + getSplitterSize()) + "px");
 +
 +            layoutManager = LayoutManager.get(client);
 +            connectorMap = ConnectorMap.get(client);
 +            if (firstChild != null) {
 +                ComponentConnector connector = connectorMap
 +                        .getConnector(firstChild);
 +                if (connector.isRelativeHeight()) {
 +                    layoutManager.reportHeightAssignedToRelative(connector,
 +                            pixelPosition);
 +                } else {
 +                    layoutManager.setNeedsMeasure(connector);
 +                }
 +            }
 +            if (secondChild != null) {
 +                ComponentConnector connector = connectorMap
 +                        .getConnector(secondChild);
 +                if (connector.isRelativeHeight()) {
 +                    layoutManager.reportHeightAssignedToRelative(connector,
 +                            secondContainerHeight);
 +                } else {
 +                    layoutManager.setNeedsMeasure(connector);
 +                }
 +            }
 +            break;
 +        }
 +    }
 +
 +    void setFirstWidget(Widget w) {
 +        if (firstChild != null) {
 +            firstChild.removeFromParent();
 +        }
 +        if (w != null) {
 +            super.add(w, firstContainer);
 +        }
 +        firstChild = w;
 +    }
 +
 +    void setSecondWidget(Widget w) {
 +        if (secondChild != null) {
 +            secondChild.removeFromParent();
 +        }
 +        if (w != null) {
 +            super.add(w, secondContainer);
 +        }
 +        secondChild = w;
 +    }
 +
 +    @Override
 +    public void onBrowserEvent(Event event) {
 +        switch (DOM.eventGetType(event)) {
 +        case Event.ONMOUSEMOVE:
 +            // case Event.ONTOUCHMOVE:
 +            if (resizing) {
 +                onMouseMove(event);
 +            }
 +            break;
 +        case Event.ONMOUSEDOWN:
 +            // case Event.ONTOUCHSTART:
 +            onMouseDown(event);
 +            break;
 +        case Event.ONMOUSEOUT:
 +            // Dragging curtain interferes with click events if added in
 +            // mousedown so we add it only when needed i.e., if the mouse moves
 +            // outside the splitter.
 +            if (resizing) {
 +                showDraggingCurtain();
 +            }
 +            break;
 +        case Event.ONMOUSEUP:
 +            // case Event.ONTOUCHEND:
 +            if (resizing) {
 +                onMouseUp(event);
 +            }
 +            break;
 +        case Event.ONCLICK:
 +            resizing = false;
 +            break;
 +        }
 +        // Only fire click event listeners if the splitter isn't moved
 +        if (Util.isTouchEvent(event) || !resized) {
 +            super.onBrowserEvent(event);
 +        } else if (DOM.eventGetType(event) == Event.ONMOUSEUP) {
 +            // Reset the resized flag after a mouseup has occured so the next
 +            // mousedown/mouseup can be interpreted as a click.
 +            resized = false;
 +        }
 +    }
 +
 +    public void onMouseDown(Event event) {
 +        if (locked || !isEnabled()) {
 +            return;
 +        }
 +        final Element trg = event.getEventTarget().cast();
 +        if (trg == splitter || trg == DOM.getChild(splitter, 0)) {
 +            resizing = true;
 +            DOM.setCapture(getElement());
 +            origX = DOM.getElementPropertyInt(splitter, "offsetLeft");
 +            origY = DOM.getElementPropertyInt(splitter, "offsetTop");
 +            origMouseX = Util.getTouchOrMouseClientX(event);
 +            origMouseY = Util.getTouchOrMouseClientY(event);
 +            event.stopPropagation();
 +            event.preventDefault();
 +        }
 +    }
 +
 +    public void onMouseMove(Event event) {
 +        switch (orientation) {
 +        case ORIENTATION_HORIZONTAL:
 +            final int x = Util.getTouchOrMouseClientX(event);
 +            onHorizontalMouseMove(x);
 +            break;
 +        case ORIENTATION_VERTICAL:
 +        default:
 +            final int y = Util.getTouchOrMouseClientY(event);
 +            onVerticalMouseMove(y);
 +            break;
 +        }
 +
 +    }
 +
 +    private void onHorizontalMouseMove(int x) {
 +        int newX = origX + x - origMouseX;
 +        if (newX < 0) {
 +            newX = 0;
 +        }
 +        if (newX + getSplitterSize() > getOffsetWidth()) {
 +            newX = getOffsetWidth() - getSplitterSize();
 +        }
 +
 +        if (position.indexOf("%") > 0) {
 +            position = convertToPositionUnits(newX + "px");
 +        } else {
 +            // Reversed position
 +            if (positionReversed) {
 +                position = (getOffsetWidth() - newX - getSplitterSize()) + "px";
 +            } else {
 +                position = newX + "px";
 +            }
 +        }
 +
 +        if (origX != newX) {
 +            resized = true;
 +        }
 +
 +        // Reversed position
 +        if (positionReversed) {
 +            newX = getOffsetWidth() - newX - getSplitterSize();
 +        }
 +
 +        setSplitPosition(newX + "px");
 +    }
 +
 +    private void onVerticalMouseMove(int y) {
 +        int newY = origY + y - origMouseY;
 +        if (newY < 0) {
 +            newY = 0;
 +        }
 +
 +        if (newY + getSplitterSize() > getOffsetHeight()) {
 +            newY = getOffsetHeight() - getSplitterSize();
 +        }
 +
 +        if (position.indexOf("%") > 0) {
 +            position = convertToPositionUnits(newY + "px");
 +        } else {
 +            // Reversed position
 +            if (positionReversed) {
 +                position = (getOffsetHeight() - newY - getSplitterSize())
 +                        + "px";
 +            } else {
 +                position = newY + "px";
 +            }
 +        }
 +
 +        if (origY != newY) {
 +            resized = true;
 +        }
 +
 +        // Reversed position
 +        if (positionReversed) {
 +            newY = getOffsetHeight() - newY - getSplitterSize();
 +        }
 +
 +        setSplitPosition(newY + "px");
 +    }
 +
 +    public void onMouseUp(Event event) {
 +        DOM.releaseCapture(getElement());
 +        hideDraggingCurtain();
 +        resizing = false;
 +        if (!Util.isTouchEvent(event)) {
 +            onMouseMove(event);
 +        }
 +        fireEvent(new SplitterMoveEvent(this));
 +    }
 +
 +    public interface SplitterMoveHandler extends EventHandler {
 +        public void splitterMoved(SplitterMoveEvent event);
 +
 +        public static class SplitterMoveEvent extends
 +                GwtEvent<SplitterMoveHandler> {
 +
 +            public static final Type<SplitterMoveHandler> TYPE = new Type<SplitterMoveHandler>();
 +
 +            private Widget splitPanel;
 +
 +            public SplitterMoveEvent(Widget splitPanel) {
 +                this.splitPanel = splitPanel;
 +            }
 +
 +            @Override
 +            public com.google.gwt.event.shared.GwtEvent.Type<SplitterMoveHandler> getAssociatedType() {
 +                return TYPE;
 +            }
 +
 +            @Override
 +            protected void dispatch(SplitterMoveHandler handler) {
 +                handler.splitterMoved(this);
 +            }
 +
 +        }
 +    }
 +
 +    String getSplitterPosition() {
 +        return position;
 +    }
 +
 +    /**
 +     * Used in FF to avoid losing mouse capture when pointer is moved on an
 +     * iframe.
 +     */
 +    private void showDraggingCurtain() {
 +        if (!isDraggingCurtainRequired()) {
 +            return;
 +        }
 +        if (draggingCurtain == null) {
 +            draggingCurtain = DOM.createDiv();
 +            DOM.setStyleAttribute(draggingCurtain, "position", "absolute");
 +            DOM.setStyleAttribute(draggingCurtain, "top", "0px");
 +            DOM.setStyleAttribute(draggingCurtain, "left", "0px");
 +            DOM.setStyleAttribute(draggingCurtain, "width", "100%");
 +            DOM.setStyleAttribute(draggingCurtain, "height", "100%");
 +            DOM.setStyleAttribute(draggingCurtain, "zIndex", ""
 +                    + VOverlay.Z_INDEX);
 +
 +            DOM.appendChild(wrapper, draggingCurtain);
 +        }
 +    }
 +
 +    /**
 +     * A dragging curtain is required in Gecko and Webkit.
 +     * 
 +     * @return true if the browser requires a dragging curtain
 +     */
 +    private boolean isDraggingCurtainRequired() {
 +        return (BrowserInfo.get().isGecko() || BrowserInfo.get().isWebkit());
 +    }
 +
 +    /**
 +     * Hides dragging curtain
 +     */
 +    private void hideDraggingCurtain() {
 +        if (draggingCurtain != null) {
 +            DOM.removeChild(wrapper, draggingCurtain);
 +            draggingCurtain = null;
 +        }
 +    }
 +
 +    private int splitterSize = -1;
 +
 +    private int getSplitterSize() {
 +        if (splitterSize < 0) {
 +            if (isAttached()) {
 +                switch (orientation) {
 +                case ORIENTATION_HORIZONTAL:
 +                    splitterSize = DOM.getElementPropertyInt(splitter,
 +                            "offsetWidth");
 +                    break;
 +
 +                default:
 +                    splitterSize = DOM.getElementPropertyInt(splitter,
 +                            "offsetHeight");
 +                    break;
 +                }
 +            }
 +        }
 +        return splitterSize;
 +    }
 +
 +    void setStylenames() {
 +        final String splitterClass = CLASSNAME
 +                + (orientation == ORIENTATION_HORIZONTAL ? "-hsplitter"
 +                        : "-vsplitter");
 +        final String firstContainerClass = CLASSNAME + "-first-container";
 +        final String secondContainerClass = CLASSNAME + "-second-container";
 +        final String lockedSuffix = locked ? "-locked" : "";
 +
 +        splitter.setClassName(splitterClass + lockedSuffix);
 +        firstContainer.setClassName(firstContainerClass);
 +        secondContainer.setClassName(secondContainerClass);
 +
 +        for (String styleName : componentStyleNames) {
 +            splitter.addClassName(splitterClass + "-" + styleName
 +                    + lockedSuffix);
 +            firstContainer.addClassName(firstContainerClass + "-" + styleName);
 +            secondContainer
 +                    .addClassName(secondContainerClass + "-" + styleName);
 +        }
 +    }
 +
 +    public void setEnabled(boolean enabled) {
 +        this.enabled = enabled;
 +    }
 +
 +    public boolean isEnabled() {
 +        return enabled;
 +    }
 +
 +}