bmpalctrl.h

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// $Id: bmpalctrl.h 751 2006-03-31 15:43:49Z alex $
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 */
// Palette control for use in the export/create bitmap copy dialog

#ifndef INC_BMPALCTRL
#define INC_BMPALCTRL

// Implementation notes:  The palette contol displays the palette in the
// bitmap export dialog.  This palette has various sort options so the user
// can view the palette in diffrent ways.  To avoid having to change the actual
// bitmap when the user changes the sort type, this controls comunicates with
// the actual palette throught an interface class, BitmapExportPaletteInterface,
// which sits between the palette from the bitmap and the palette that this
// control uses (throught the member variable m_Palette).  Because of this,
// when the palette is comunicating with other parts of camelot, it must take
// into account this sorting and provide indexs into the palette in terms that
// the caller expects (ie sorted or non sorted).

#include "bmpalint.h"

class BitmapExportOptions;
class BmapPrevDlg;

/**************************************************************************************
>   class BitmapExportPaletteControl : public CC_CLASS_MEMDUMP
    Author:     Jonathan_Payne (Xara Group Ltd) <camelotdev@xara.com>
    Created:    8/11/2000
    Purpose:    Wraps a palette control for use in the export/create bmp copy dialog
**************************************************************************************/
class BitmapExportPaletteControl : public CCObject
{
    // Declare the class for memory tracking
    CC_DECLARE_MEMDUMP(BitmapExportPaletteControl);
private:
    // Data members
    INT32           m_MouseOverCell;    // Cell that the mouse is over (highlighed cell), -1 means none
    INT32           m_SelectedCell;     // Cell that is selected, -1 means none

    BitmapExportPaletteInterface    m_Palette;

    CWindowID   m_WindowID;

    // Constants (that are set in the constuctor as they are DPI dpenedant)
    INT32 m_nPixelSize;
    INT32 m_nCellWidthPixels;
    INT32 m_nCellHeightPixels;
    INT32 m_nCellWidth;
    INT32 m_nCellHeight;
    INT32 m_nCellsPerLine;

    INT32 m_NumberOfColoursAtLastRedraw; // used so we know when to redraw the background

public:
    // Constants
    enum {
        INVALID_COLOUR_VALUE    = -1 // A value that can never be a colour index
    };

    // Constructors / Destructors
    BitmapExportPaletteControl();
    ~BitmapExportPaletteControl();
    void Init(CWindowID wid) { m_WindowID = wid; };

    // Manipulators
    void SetCurrentSortType(BitmapExportPaletteInterface::PaletteSortType newSortType);
    void SetSelectedColourToggleLocked();
    void SetSelectedColourWebSafe();
    bool SetSelectedColourToggleTransparent();
    void SetSelectedColourToggleDeleted();

    // These functions set the selected/hightlighted cell based on an index into
    // the real palette (so 0 is the first colour in the bitmap's palette)
    bool SetSelectedCell(ReDrawInfoType *pInfo, INT32 paletteIndex);
    bool SetHighlightedCell(ReDrawInfoType *pInfo, INT32 paletteIndex);

    // Access functions
    BitmapExportPaletteInterface::PaletteSortType GetCurrentSortType();
    INT32 GetSelectedColour();                                  // Find out the palette index of the selected colour
    INT32 GetMouseOverColour();                                 // Find out the palette index of the selected colour
    bool GetSelectedColourLocked();
    bool GetSelectedColourWebSafe();
    bool GetSelectedColourTransparent();
    bool GetSelectedColourDeleted();

    // Message processing funtions
    void MsgMouseMove(ReDrawInfoType *pInfo);
    bool MsgMouseLeftButtonDown(ReDrawInfoType *pInfo);
    void MsgMouseRightButtonUp(ReDrawInfoType *pInfo, BmapPrevDlg *pBmapPrevDlg);

    // Actions
    void Render(ReDrawInfoType *pInfo);
    void RenderSoon();
    void RedrawSelectedCell(ReDrawInfoType *pInfo);

private:
    INT32 GetCellFromPos(INT32 x, INT32 y);
    void RenderGrey(DocRect *pPaletteSize, RenderRegion *pRender);
    void RenderPalette(DocRect *pPaletteSize, RenderRegion *pRender, INT32 controlHeight, DocRect* pClipRect);
    void GetRectForCell(INT32 cell, DocRect *rect, INT32 controlHeight);
    void InvalidateCell(ReDrawInfoType *pInfo, INT32 paletteIndex);
    void DrawCell(DocRect *rect, DocColour colour, INT32 flags, RenderRegion *pRender,
                                                bool webSafe, bool selected);
    bool IsColourWebSafe(BYTE r, BYTE g, BYTE b);
    void MakeColourWebSafe(BYTE *pColour);

    // These functions set the selected/hightlighted cell based on an index into
    // the sorted palette (so 0 is the top left cell)
    bool SetSelectedCellFromSortedIndex(ReDrawInfoType *pInfo, INT32 paletteIndex);
    bool SetHighlightedCellFromSortedIndex(ReDrawInfoType *pInfo, INT32 paletteIndex);
};

#endif  // INC_BMPALCTRL

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