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ValueScrollBar.h

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// Author: Richard van Balen, for University of Amsterdam

#ifndef OglGui_ValueScrollBar_h
#define OglGui_ValueScrollBar_h

#ifndef OglGui_ScrollBar_h
#include "OglGui/ScrollBar.h"
#endif

#ifndef OglGui_ValueScrollBarListener_h
#include "OglGui/ValueScrollBarListener.h"
#endif

namespace OglGui { 

class ValueScrollBar : public Window, ScrollBarListener
{
public:

    ValueScrollBar(int x, int y, int w, int h,
                   int minVal, int maxVal, int val, int margin=2) :
        Window(x, y, w, h)
    {
        Init(w, h, minVal, maxVal, val, margin);
    }
    ValueScrollBar(Window* parent, int x, int y, int w, int h,
                   int minVal, int maxVal, int val, int margin=2) :
        Window(parent, x, y, w, h)
    {
        Init(w, h, minVal, maxVal, val, margin);
    }
    ValueScrollBar(Window* parent, int w, int h,
                   int minVal, int maxVal, int val, int margin=2) :
        Window(parent, w, h)
    {
        Init(w, h, minVal, maxVal, val, margin);
    }

    void SetValueScrollBarListener(ValueScrollBarListener* l, void* userData=0)
    {
        mListener = l;
        mListenerData = userData;
    }

    virtual void OnScroll(ScrollBar *src, int position, void* userData)
    {
        sprintf(mTxtBuf, "%d", mMinVal + position);
        mValueTxt->SetText(mTxtBuf);
        if (mListener)
            mListener->OnValueChanged(this, mMinVal+position, userData);
    }

    void SetMinMaxValue(int minVal, int maxVal)
    {
        mMinVal = minVal;
        mMaxVal = maxVal;
        mScrollBar->SetRange(maxVal-minVal + 2, 2);
    }

    void GetMinMaxValue(int& minVal, int& maxVal)
    {
        minVal = mMinVal;
        maxVal = mMaxVal;
    }

    void SetValue(int val)       { mScrollBar->SetValue(val - mMinVal); }
    int  GetValue()              { return mScrollBar->GetValue() + mMinVal; }
    
    ScrollBar*    SBar()    { return mScrollBar; }
    StaticText*   ValText() { return mValueTxt;  }

private:
    void Init(int w, int h, int minVal, int maxVal, int val, int m)
    {
        mListener = 0;
        mListenerData = 0;

        mMinVal = minVal;
        mMaxVal = maxVal;

        SetBorderType(BEV_ETCHED);

        mScrollBar = new ScrollBar(this, m, m, w-46-2*m, h-2*m, true);
        mScrollBar->SetRange(maxVal-minVal + 10, 10);
        mScrollBar->SetNewPos(val - minVal);
        mScrollBar->ConnectTo(this);
        mScrollBar->SetScrollBarListener(this, 0);

        sprintf(mTxtBuf, "%d", val);
        mValueTxt = new StaticText(this, w-46-m, m, 46, h-2*m, mTxtBuf);
        mValueTxt->SetBorderType(BEV_ETCHED);
        mValueTxt->ConnectTo(this, L2R | R2R | T2T | B2B);

        // We already handle scaling ourself, so prevent others
        SetAllowChildScaling(false);
    }

    ValueScrollBarListener* mListener;
    void*                   mListenerData;

    ScrollBar*              mScrollBar;
    StaticText*             mValueTxt;
    int                     mMinVal, mMaxVal;
    char                    mTxtBuf[10];
};

}// namespace OglGui
#endif

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