TnbMfcRotaryCtrl.h

[詳解]

#pragma once
#include "TnbMfcDrawingStatic.h"
#include "TnbBitmapImage.h"
#include "TnbGdiPlus.h"
 
 
 
#define ROTARY_CHANGED_T            0x100
 
 
 
//TNB Library
namespace TNB {
namespace MFC {
 
 
 
class CRotaryCtrl : public CDrawingStatic
{
    DEFSUPER(CDrawingStatic);
public:
 
    CRotaryCtrl(void) : m_value(0x00)
    {
    }
 
    void SetImage(CBitmapHandle b, CBitmapHandle a, COLORREF transColor = RGB(255, 0, 255))
    {
        m_baseImage = b;
        m_arrowImage = a;
        m_arrowTransColor = transColor;
        m_ResetBitmap();
    }
 
    BYTE GetValue(void) const
    {
        return m_value;
    }
 
    void Increment(void)
    {
        SetValue(static_cast<BYTE>((m_value + 1) & 0xF));
    }
 
    void Decrement(void)
    {
        SetValue(static_cast<BYTE>((m_value - 1) & 0xF));
    }
 
    void SetValue(BYTE value)
    {
        m_value = value;
        if ( ::IsWindow(_super::GetSafeHwnd()) )
        {
            m_ResetBitmap();
        }
    }
 
protected:
    virtual void PreSubclassWindow(void)
    {
        _super::PreSubclassWindow();
        m_ResetBitmap();
    }
 
    virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
    {
        switch ( message )
        {
        case WM_LBUTTONDOWN:
        case WM_LBUTTONDBLCLK:
            m_value++;
            m_value &= 0xF;
            m_ResetBitmap();
            SetFocus();
            MFCLIB::SendCommandMessage(this, ROTARY_CHANGED_T);
            break;
        case WM_RBUTTONDOWN:
        case WM_RBUTTONDBLCLK:
            m_value--;
            m_value &= 0xF;
            m_ResetBitmap();
            SetFocus();
            MFCLIB::SendCommandMessage(this, ROTARY_CHANGED_T);
            break;
        case WM_MOUSEWHEEL:
            if ( static_cast<short>(HIWORD(wParam)) > 0 )
            {
                m_value++;
            }
            else
            {
                m_value--;
            }
            m_value &= 0xF;
            m_ResetBitmap();
            SetFocus();
            MFCLIB::SendCommandMessage(this, ROTARY_CHANGED_T);
            break;
        case WM_GETDLGCODE:
            {
                LRESULT r = _super::WindowProc(message, wParam, lParam);
                return (r & ~DLGC_STATIC);
            }
            break;
        default:
            break;
        }
        return _super::WindowProc(message, wParam, lParam);
    }
 
private:
    void m_ResetBitmap(void)
    {
        CBitmapImage base;
        base.Set(m_baseImage);
        if ( base.IsEmpty() )
        {
            return;
        }
        m_size = base.GetSize();
        CBitmapImage arrow;
        arrow.Set(m_size.cx, m_size.cy, m_arrowTransColor);
        {
            CBitmapHandle h = m_arrowImage;
            CGdiPlus g(arrow.GetDC());
            g.SetImageInterpolationMode(CGdiPlus::NEAREST_NEIGHBOR);
            g.DrawRotateImage(CGdiPlus::CPos(m_size.cx / 2, m_size.cy / 2), h, (360.0 / 16.0) * m_value);
        }
        arrow.ReleaseDC();
        base.InsertOnTransparent(0, 0, arrow);
        _super::SetDrawingBitmap(base, true, true);
    }
 
    CBitmapHandle   m_baseImage;        
    CBitmapHandle   m_arrowImage;       
    COLORREF        m_arrowTransColor;  
    BYTE            m_value;            
    SIZE            m_size;             
};
 
 
 
}; //MFC
}; //TNB