Subversion Repositories spk

//************************************************************************

//

// LCDStreamingText.h

//

// The CLCDStreamingText class draws streaming text onto the LCD.

// Streaming text is a single line of text that is repeatedly streamed

// horizontally across the LCD.

// 

// Logitech LCD SDK

//

// Copyright 2005 Logitech Inc.

//************************************************************************

#ifndef _LCDSTREAMINGTEXT_H_INCLUDED_ 

#define _LCDSTREAMINGTEXT_H_INCLUDED_ 

#include "LCDBase.h"

#include "LCDCollection.h"

#include "LCDText.h"

#include <string>

using namespace std;

class CLCDStreamingText: public CLCDCollection

{

public:

    CLCDStreamingText();

    virtual ~CLCDStreamingText();

    // CLCDBase

    virtual HRESULT Initialize(void);

    virtual void ResetUpdate(void);

    virtual void Show(BOOL bShow);

    virtual void SetOrigin(POINT pt);

    virtual void SetOrigin(int nX, int nY);

    void SetText(LPCTSTR szText);

    void SetText ( const std::string &sszText);

    void SetGapText(LPCTSTR szGapText);

    void SetStartDelay(DWORD dwMilliseconds);

    void SetSpeed(DWORD dwSpeed);

	void SetScrollingStep(DWORD dwStepInPixels);

    void SetAlignment(int nAlignment = DT_LEFT);

    void SetFont(LOGFONT& lf);

    void SetFontFaceName(LPCTSTR szFontName);

    void SetFontPointSize(int nSize);

    void SetFontWeight(int nPointSize);

    HFONT GetFont();

    enum { DEFAULT_DPI = 96, DEFAULT_POINTSIZE = 8 };

protected:

    virtual void OnUpdate(DWORD dwTimestamp);

    virtual void OnDraw(CLCDGfx &rGfx);

private:

    int AddText(LPCTSTR szText);

    void RemoveText(int nIndex);

    void RemoveAllText();

private:

    BOOL RecalcTextBoxes(CLCDGfx &rGfx);

    void RecalcTextBoxOrigins();

    void ApplyOrigins(int nOffset);

    enum eSCROLL_STATES { STATE_DELAY, STATE_SCROLL};

    DWORD m_dwEllapsedTime; // ellapsed time in state

    DWORD m_dwStartDelay;   // milliseconds

    DWORD m_dwSpeed;        // pixels/second

	DWORD m_dwStepInPixels; // Number of pixels to shift

    DWORD m_dwLastUpdate;   // milliseconds

    eSCROLL_STATES m_eState;

    BOOL m_bRecalcExtent;

    CLCDText* m_pQueueHead;

#ifdef UNICODE

    std::wstring m_sText;

    std::wstring m_sGapText;

#else

    std::string m_sText;

    std::string m_sGapText;

#endif

    HFONT m_hFont;

    int m_nTextAlignment;

    float m_fFractDistance;

};

#endif // !_LCDSTREAMINGTEXT_H_INCLUDED_ 

//** end of LCDStreamingText.h *******************************************