include/graphics/SkScrollBarView.h

/* include/graphics/SkScrollBarView.h
**
** Copyright 2006, Google Inc.
**
** Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 
**
** Unless required by applicable law or agreed to in writing, software 
** distributed under the License is distributed on an "AS IS" BASIS, 
** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
** See the License for the specific language governing permissions and 
** limitations under the License.
*/

#ifndef SkScrollBarView_DEFINED
#define SkScrollBarView_DEFINED

#include "SkView.h"
#include "SkWidgetViews.h"
#include "SkAnimator.h"

class SkScrollBarView : public SkWidgetView {
public:
    SkScrollBarView();

    unsigned getStart() const { return fStartPoint; }
    unsigned getShown() const { return fShownLength; }
    unsigned getTotal() const { return fTotalLength; }

    void setStart(unsigned start);  
    void setShown(unsigned shown);
    void setTotal(unsigned total);
    
protected:
    //overrides
    virtual void onInflate(const SkDOM& dom, const SkDOM::Node* node);
    virtual void onSizeChange();
    virtual void onDraw(SkCanvas* canvas);
    virtual bool onEvent(const SkEvent& evt);

private:
    SkAnimator  fAnim;
    unsigned    fTotalLength, fStartPoint, fShownLength;
    
    void adjust();
    
    typedef SkWidgetView INHERITED;
};
#endif