/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code mozilla.org code.
 *
 * The Initial Developer of the Original Code Christopher Blizzard
 * <blizzard@mozilla.org>.  Portions created by the Initial Developer
 * are Copyright (C) 2001 the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsBaseWidget.h"
#include "nsIScrollbar.h"

#include <gtk/gtkwidget.h>

#include "nsCommonWidget.h"

class nsScrollbar : public nsCommonWidget,
                    public nsIScrollbar {
 public:
  nsScrollbar(PRBool aIsVertical);
  virtual ~nsScrollbar();

  NS_DECL_ISUPPORTS_INHERITED

  // nsIWidget
  NS_IMETHOD Create(nsIWidget        *aParent,
                    const nsRect     &aRect,
                    EVENT_CALLBACK   aHandleEventFunction,
                    nsIDeviceContext *aContext,
                    nsIAppShell      *aAppShell = nsnull,
                    nsIToolkit       *aToolkit = nsnull,
                    nsWidgetInitData *aInitData = nsnull);
  NS_IMETHOD Create(nsNativeWidget aParent,
                    const nsRect     &aRect,
                    EVENT_CALLBACK   aHandleEventFunction,
                    nsIDeviceContext *aContext,
                    nsIAppShell      *aAppShell = nsnull,
                    nsIToolkit       *aToolkit = nsnull,
                    nsWidgetInitData *aInitData = nsnull);
  NS_IMETHOD Destroy(void);
  NS_IMETHOD IsVisible(PRBool & aState);
  NS_IMETHOD ConstrainPosition(PRBool aAllowSlop, PRInt32 *aX, PRInt32 *aY);
  NS_IMETHOD Move(PRInt32 aX, PRInt32 aY);
  NS_IMETHOD Enable(PRBool aState);
  NS_IMETHOD SetFocus(PRBool aRaise = PR_FALSE);
  virtual nsIFontMetrics* GetFont(void);
  NS_IMETHOD SetFont(const nsFont &aFont);
  NS_IMETHOD Invalidate(PRBool aIsSynchronous);
  NS_IMETHOD Invalidate(const nsRect & aRect, PRBool aIsSynchronous);
  NS_IMETHOD Update();
  NS_IMETHOD SetColorMap(nsColorMap *aColorMap);
  NS_IMETHOD Scroll(PRInt32 aDx, PRInt32 aDy, nsRect *aClipRect);
  virtual void* GetNativeData(PRUint32 aDataType);
  NS_IMETHOD SetTitle(const nsString& aTitle);
  NS_IMETHOD SetMenuBar(nsIMenuBar * aMenuBar);
  NS_IMETHOD ShowMenuBar(PRBool aShow);
  NS_IMETHOD WidgetToScreen(const nsRect& aOldRect, nsRect& aNewRect);
  NS_IMETHOD ScreenToWidget(const nsRect& aOldRect, nsRect& aNewRect);
  NS_IMETHOD BeginResizingChildren(void);
  NS_IMETHOD EndResizingChildren(void);
  NS_IMETHOD CaptureRollupEvents(nsIRollupListener * aListener,
                                 PRBool aDoCapture,
                                 PRBool aConsumeRollupEvent);

  // nsIScrollbar
  NS_IMETHOD SetMaxRange(PRUint32 aEndRange);
  NS_IMETHOD GetMaxRange(PRUint32& aMaxRange);
  NS_IMETHOD SetPosition(PRUint32 aPos);
  NS_IMETHOD GetPosition(PRUint32& aPos);
  NS_IMETHOD SetThumbSize(PRUint32 aSize);
  NS_IMETHOD GetThumbSize(PRUint32& aSize);
  NS_IMETHOD SetLineIncrement(PRUint32 aSize);
  NS_IMETHOD GetLineIncrement(PRUint32& aSize);
  NS_IMETHOD SetParameters(PRUint32 aMaxRange, PRUint32 aThumbSize,
			   PRUint32 aPosition, PRUint32 aLineIncrement);

  // from nsBaseWidget
  NS_IMETHOD         SetBounds        (const nsRect &aRect);

  nsresult NativeCreate(nsIWidget        *aParent,
		        nsNativeWidget    aNativeParent,
		        const nsRect     &aRect,
		        EVENT_CALLBACK    aHandleEventFunction,
		        nsIDeviceContext *aContext,
		        nsIAppShell      *aAppShell,
		        nsIToolkit       *aToolkit,
		        nsWidgetInitData *aInitData);
  
  // common widget
  void NativeResize(PRInt32 aWidth, PRInt32 aHeight, PRBool  aRepaint);
  
  void NativeResize(PRInt32 aX, PRInt32 aY,
		    PRInt32 aWidth, PRInt32 aHeight,
		    PRBool  aRepaint);
  
  void NativeShow  (PRBool  aAction);

  // Callbacks
  void OnValueChanged(void);

 private:
  GtkWidget      *mWidget;
  GtkOrientation  mOrientation;
  GtkAdjustment  *mAdjustment;
};