ColorPicker Class Reference

#include <wizard.h>

Inheritance diagram for ColorPicker:

Public Types
enum	Mode { Hue, Saturation, Gamma }

Public Slots
void	setCol (int h, int s, int g)

Signals
void	newHsv (int h, int s, int g)

Public Member Functions
	ColorPicker (Mode m)
	~ColorPicker ()

Protected Member Functions
void	paintEvent (QPaintEvent *)
void	mouseMoveEvent (QMouseEvent *)
void	mousePressEvent (QMouseEvent *)

Private Types
enum	{ foff = 3, coff = 4 }

Private Member Functions
int	y2hue (int y)
int	y2sat (int y)
int	y2gam (int y)
int	hue2y (int hue)
int	sat2y (int sat)
int	gam2y (int gamma)
void	setHue (int v)
void	setSat (int v)
void	setGam (int v)

Private Attributes
QPixmap *	m_pix
Mode	m_mode
int	m_gam
int	m_hue
int	m_sat

Detailed Description

Definition at line 62 of file wizard.h.

Member Enumeration Documentation

anonymous enum

private

Enumerator
foff
coff

Definition at line 83 of file wizard.h.

{ foff = 3, coff = 4 }; //frame and contents offset

enum ColorPicker::Mode

Enumerator
Hue
Saturation
Gamma

Definition at line 66 of file wizard.h.

{ Hue, Saturation, Gamma };

Constructor & Destructor Documentation

ColorPicker::ColorPicker

(

Mode

m

)

Definition at line 313 of file wizard.cpp.

{
  m_hue = 220;
  m_gam = 100;
  m_sat = 100;
  m_mode = m;
  m_pix = 0;
}

ColorPicker::~ColorPicker

(

)

Definition at line 322 of file wizard.cpp.

{
  delete m_pix;
}

Member Function Documentation

int ColorPicker::gam2y ( int  gamma )

private

Definition at line 454 of file wizard.cpp.

{
  int d = height() - 2*coff - 1;
  return coff + (240-g)*d/200;
}

int ColorPicker::hue2y ( int  hue )

private

Definition at line 430 of file wizard.cpp.

{
  int d = height() - 2*coff - 1;
  return coff + v*d/359;
}

void ColorPicker::mouseMoveEvent ( QMouseEvent *  m )

protected

Definition at line 371 of file wizard.cpp.

{
  if      (m_mode==Hue)        setHue(y2hue(m->y())); 
  else if (m_mode==Saturation) setSat(y2sat(m->y()));
  else                         setGam(y2gam(m->y()));
}

void ColorPicker::mousePressEvent ( QMouseEvent *  m )

protected

Definition at line 378 of file wizard.cpp.

{
  if      (m_mode==Hue)        setHue(y2hue(m->y())); 
  else if (m_mode==Saturation) setSat(y2sat(m->y()));
  else                         setGam(y2gam(m->y()));
}

void ColorPicker::newHsv ( int  h, int  s, int  g  )

signal

void ColorPicker::paintEvent ( QPaintEvent *  )

protected

Definition at line 327 of file wizard.cpp.

{
  int w = width() - 5;

  QRect r(0, foff, w, height() - 2*foff);
  int wi = r.width() - 2;
  int hi = r.height() - 2;
  if (!m_pix || m_pix->height() != hi || m_pix->width() != wi) 
  {
    delete m_pix;
    QImage img(wi, hi, QImage::Format_RGB32);
    int y;
    uint *pixel = (uint *) img.scanLine(0);
    for (y = 0; y < hi; y++) 
    {
      const uint *end = pixel + wi;
      int yh = y2hue(y+coff);
      int ys = y2sat(y+coff);
      int yg = y2gam(y+coff);
      while (pixel < end) 
      {
        QColor c;
        c.setHsv(yh, ys, (int)(255*pow(0.7,yg/100.0)));
        *pixel = c.rgb();
        ++pixel;
      }
    }
    m_pix = new QPixmap(QPixmap::fromImage(img));
  }
  QPainter p(this);
  p.drawPixmap(1, coff, *m_pix);
  const QPalette &g = palette();
  qDrawShadePanel(&p, r, g, true);
  p.setPen(g.foreground().color());
  p.setBrush(g.foreground());
  QPolygon a;
  int y = m_mode==Hue ?        hue2y(m_hue) : 
          m_mode==Saturation ? sat2y(m_sat) :
                               gam2y(m_gam);
  a.setPoints(3, w, y, w+5, y+5, w+5, y-5);
  p.eraseRect(w, 0, 5, height());
  p.drawPolygon(a);
}

int ColorPicker::sat2y ( int  sat )

private

Definition at line 442 of file wizard.cpp.

{
  int d = height() - 2*coff - 1;
  return coff + (255-v)*d/255;
}

void ColorPicker::setCol ( int  h, int  s, int  g  )

slot

Definition at line 412 of file wizard.cpp.

{
  if (m_hue!=h || m_sat!=s || m_gam!=g)
  {
    m_hue = h;
    m_sat = s;
    m_gam = g;
    delete m_pix; m_pix=0;
    repaint();
  }
}

void ColorPicker::setGam ( int  v )

private

Definition at line 403 of file wizard.cpp.

{
  if (g==m_gam) return;
  m_gam = qMax(40,qMin(g,240));
  delete m_pix; m_pix=0;
  repaint();
  emit newHsv(m_hue,m_sat,m_gam);
}

void ColorPicker::setHue ( int  v )

private

Definition at line 385 of file wizard.cpp.

{
  if (h==m_hue) return;
  m_hue = qMax(0,qMin(h,359));
  delete m_pix; m_pix=0;
  repaint();
  emit newHsv(m_hue,m_sat,m_gam);
}

void ColorPicker::setSat ( int  v )

private

Definition at line 394 of file wizard.cpp.

{
  if (s==m_sat) return;
  m_sat = qMax(0,qMin(s,255));
  delete m_pix; m_pix=0;
  repaint();
  emit newHsv(m_hue,m_sat,m_gam);
}

int ColorPicker::y2gam ( int  y )

private

Definition at line 448 of file wizard.cpp.

{
  int d = height() - 2*coff - 1;
  return m_mode==Gamma ? 240 - (y - coff)*200/d : m_gam;
}

int ColorPicker::y2hue ( int  y )

private

Definition at line 424 of file wizard.cpp.

{
  int d = height() - 2*coff - 1;
  return m_mode==Hue ? (y - coff)*359/d : m_hue;
}

int ColorPicker::y2sat ( int  y )

private

Definition at line 436 of file wizard.cpp.

{
  int d = height() - 2*coff - 1;
  return m_mode==Saturation ? 255 - (y - coff)*255/d : m_sat;
}

Member Data Documentation

int ColorPicker::m_gam

private

Definition at line 96 of file wizard.h.

int ColorPicker::m_hue

private

Definition at line 97 of file wizard.h.

Mode ColorPicker::m_mode

private

Definition at line 95 of file wizard.h.

QPixmap* ColorPicker::m_pix

private

Definition at line 94 of file wizard.h.

int ColorPicker::m_sat

private

Definition at line 98 of file wizard.h.

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The documentation for this class was generated from the following files:

• doxygen-1.8.11/addon/doxywizard/wizard.h
• doxygen-1.8.11/addon/doxywizard/wizard.cpp