library: libGui #include "TGColorDialog.h"

# TGColorPick

class description - source file - inheritance tree (.pdf)

## class TGColorPick : public TGFrame, public TGWidget

| Inheritance Chart:
`TObject`
| <- | `TGObject`
| <- | `TGWindow`
`TQObject`
| <- | `TGFrame`
`TGWidget`
| <- | `TGColorPick` |

        protected:

                  void AllocColors()
                  void CreateDitheredImage(Pixmap_t image, Int_t which)
                  void CreateImages()
          virtual void DoRedraw()
                  void DrawHScursor(Int_t onoff)
                  void DrawLcursor(Int_t onoff)
                  void FreeColors()
                  void InitImages()
                  void SetHScursor(Int_t x, Int_t y)
                  void SetLcursor(Int_t z)
                  void SetSliderColor()
                  void UpdateCurrentColor()

        public:

                          TGColorPick(const TGWindow* p = 0, Int_t w = 1, Int_t h = 1, Int_t id = -1)
                          TGColorPick(const TGColorPick&)
                  virtual ~TGColorPick()
           static TClass* Class()
             virtual void ColorSelected(Pixel_t col = 0)
                  Pixel_t GetCurrentColor() const
           virtual Bool_t HandleButton(Event_t* event)
           virtual Bool_t HandleMotion(Event_t* event)
          virtual TClass* IsA() const
                     void SetColor(Pixel_t color)
             virtual void ShowMembers(TMemberInspector& insp, char* parent)
             virtual void Streamer(TBuffer& b)
                     void StreamerNVirtual(TBuffer& b)

### Data Members

        private:

            Int_t fColormap[64][3]  colormap
          Pixel_t fPixel[64]        pixel values

        protected:

             Pixmap_t fHSimage
             Pixmap_t fLimage
                Int_t fNColors
                Int_t fClick
                Int_t fCx
                Int_t fCy
                Int_t fCz
              Pixel_t fCurrentColor
          Rectangle_t fColormapRect
          Rectangle_t fSliderRect
                 TGGC fCursorGC

## Class Description

     TGColorPalette, TGColorPick and TGColorDialog.

     The TGColorPalette is a widget showing an matrix of color cells. The
     colors can be set and selected.

     The TGColorPick is a widget which allows a color to be picked from
     HLS space. It consists of two elements: a color map window from
     where the user can select the hue and saturation level of a color,
     and a slider to select color's lightness.

     Selecting a color in these two widgets will generate the event:
     kC_COLORSEL, kCOL_CLICK, widget id, 0.
     and the signal:
     ColorSelected(Pixel_t color)

     The TGColorDialog presents a full featured color selection dialog.
     It uses 2 TGColorPalette's and the TGColorPick widgets.

TGColorPick(const TGWindow *p, Int_t w, Int_t h, Int_t id) : TGFrame(p, w, h, kChildFrame), fCursorGC(GetBlackGC())

~TGColorPick()

Bool_t HandleButton(Event_t *event)

Bool_t HandleMotion(Event_t *event)

void CreateImages()

void AllocColors()

     Try to allocate first a palette of 64 colors. Used by the dithered
     version of the color maps.

void FreeColors()

void CreateDitheredImage(Pixmap_t image, Int_t which)

     Create a dithered version of the color map and lightness images for
     display modes with reduced number of colors. The Floyd-Steinberg error
     diffusion dithering algorithm is used.
     This routine is called in PseudoColor modes only.

void InitImages()

void SetSliderColor()

void SetColor(ULong_t color)

void UpdateCurrentColor()

void DoRedraw()

void SetHScursor(Int_t x, Int_t y)

void SetLcursor(Int_t z)

void DrawHScursor(Int_t onoff)

void DrawLcursor(Int_t onoff)

### Inline Functions

                Pixel_t GetCurrentColor() const
                   void ColorSelected(Pixel_t col = 0)
                TClass* Class()
                TClass* IsA() const
                   void ShowMembers(TMemberInspector& insp, char* parent)
                   void Streamer(TBuffer& b)
                   void StreamerNVirtual(TBuffer& b)
            TGColorPick TGColorPick(const TGColorPick&)

Author: Bertrand Bellenot + Fons Rademakers 22/08/02
Last update: root/gui:$Name: $:$Id: TGColorDialog.cxx,v 1.16 2005/01/18 21:07:26 brun Exp $
Copyright (C) 1995-2002, Rene Brun and Fons Rademakers. *