src/ribbon/art_internal.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/ribbon/art_internal.cpp
   3 // Purpose:     Helper functions & classes used by ribbon art providers
   4 // Author:      Peter Cawley
   5 // Modified by:
   6 // Created:     2009-08-04
   7 // RCS-ID:      $Id$
   8 // Copyright:   (C) Peter Cawley
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #ifdef __BORLANDC__
  15     #pragma hdrstop
  16 #endif
  17
  18 #if wxUSE_RIBBON
  19
  20 #include "wx/ribbon/art.h"
  21 #include "wx/ribbon/art_internal.h"
  22 #include "wx/ribbon/bar.h"
  23 #include "wx/ribbon/buttonbar.h"
  24 #include "wx/ribbon/gallery.h"
  25
  26 #ifndef WX_PRECOMP
  27 #include "wx/dc.h"
  28 #endif
  29
  30 #ifdef __WXMSW__
  31 #include "wx/msw/private.h"
  32 #endif
  33
  34 wxRibbonArtProvider::wxRibbonArtProvider() {}
  35 wxRibbonArtProvider::~wxRibbonArtProvider() {}
  36
  37 wxColour wxRibbonInterpolateColour(const wxColour& start_colour,
  38                                 const wxColour& end_colour,
  39                                 int position,
  40                                 int start_position,
  41                                 int end_position)
  42 {
  43     if(position <= start_position)
  44     {
  45         return start_colour;
  46     }
  47     if(position >= end_position)
  48     {
  49         return end_colour;
  50     }
  51     position -= start_position;
  52     end_position -= start_position;
  53     int r = end_colour.Red() - start_colour.Red();
  54     int g = end_colour.Green() - start_colour.Green();
  55     int b = end_colour.Blue() - start_colour.Blue();
  56     r = start_colour.Red()   + (((r * position * 100) / end_position) / 100);
  57     g = start_colour.Green() + (((g * position * 100) / end_position) / 100);
  58     b = start_colour.Blue()  + (((b * position * 100) / end_position) / 100);
  59     return wxColour(r, g, b);
  60 }
  61
  62 bool wxRibbonCanLabelBreakAtPosition(const wxString& label, size_t pos)
  63 {
  64     return label[pos] == ' ';
  65 }
  66
  67 void wxRibbonDrawParallelGradientLines(wxDC& dc,
  68                                     int nlines,
  69                                     const wxPoint* line_origins,
  70                                     int stepx,
  71                                     int stepy,
  72                                     int numsteps,
  73                                     int offset_x,
  74                                     int offset_y,
  75                                     const wxColour& start_colour,
  76                                     const wxColour& end_colour)
  77 {
  78     int rd, gd, bd;
  79     rd = end_colour.Red() - start_colour.Red();
  80     gd = end_colour.Green() - start_colour.Green();
  81     bd = end_colour.Blue() - start_colour.Blue();
  82
  83     for (int step = 0; step < numsteps; ++step)
  84     {
  85         int r,g,b;
  86
  87         r = start_colour.Red() + (((step*rd*100)/numsteps)/100);
  88         g = start_colour.Green() + (((step*gd*100)/numsteps)/100);
  89         b = start_colour.Blue() + (((step*bd*100)/numsteps)/100);
  90
  91         wxPen p(wxColour((unsigned char)r,
  92                         (unsigned char)g,
  93                         (unsigned char)b));
  94         dc.SetPen(p);
  95
  96         for(int n = 0; n < nlines; ++n)
  97         {
  98             dc.DrawLine(offset_x + line_origins[n].x, offset_y + line_origins[n].y,
  99                         offset_x + line_origins[n].x + stepx, offset_y + line_origins[n].y + stepy);
 100         }
 101
 102         offset_x += stepx;
 103         offset_y += stepy;
 104     }
 105 }
 106
 107 wxRibbonHSLColour wxRibbonShiftLuminance(wxRibbonHSLColour colour,
 108                                                 float amount)
 109 {
 110     if(amount <= 1.0f)
 111         return colour.Darker(colour.luminance * (1.0f - amount));
 112     else
 113         return colour.Lighter((1.0f - colour.luminance) * (amount - 1.0f));
 114 }
 115
 116 wxBitmap wxRibbonLoadPixmap(const char* const* bits, wxColour fore)
 117 {
 118     wxImage xpm = wxBitmap(bits).ConvertToImage();
 119     xpm.Replace(255, 0, 255, fore.Red(), fore.Green(), fore.Blue());
 120     return wxBitmap(xpm);
 121 }
 122
 123 wxRibbonHSLColour::wxRibbonHSLColour(const wxColour& col)
 124 {
 125     float red = float(col.Red()) / 255.0;
 126     float green = float(col.Green()) / 255.0;
 127     float blue = float(col.Blue()) / 255.0;
 128     float Min = wxMin(red, wxMin(green, blue));
 129     float Max = wxMax(red, wxMax(green, blue));
 130     luminance = 0.5 * (Max + Min);
 131     if (Min == Max)
 132     {
 133         // colour is a shade of grey
 134         hue = 0.0;
 135         saturation = 0.0;
 136     }
 137     else
 138     {
 139         if(luminance <= 0.5)
 140             saturation = (Max - Min) / (Max + Min);
 141         else
 142             saturation = (Max - Min) / (2.0 - (Max + Min));
 143
 144         if(Max == red)
 145         {
 146             hue = 60.0 * (green - blue) / (Max - Min);
 147             if(hue < 0.0)
 148                 hue += 360.0;
 149         }
 150         else if(Max == green)
 151         {
 152             hue = 60.0 * (blue - red) / (Max - Min);
 153             hue += 120.0;
 154         }
 155         else // Max == blue
 156         {
 157             hue = 60.0 * (red - green) / (Max - Min);
 158             hue += 240.0;
 159         }
 160     }
 161 }
 162
 163 wxColour wxRibbonHSLColour::ToRGB() const
 164 {
 165     float _hue = (hue - floor(hue / 360.0f) * 360.0f);
 166     float _saturation = saturation;
 167     float _luminance = luminance;
 168     if(_saturation > 1.0) _saturation = 1.0;
 169     if(_saturation < 0.0) _saturation = 0.0;
 170     if(_luminance > 1.0) _luminance = 1.0;
 171     if(_luminance < 0.0) _luminance = 0.0;
 172
 173     float red, blue, green;
 174     if(_saturation == 0.0)
 175     {
 176         // colour is a shade of grey
 177         red = blue = green = _luminance;
 178     }
 179     else
 180     {
 181         double tmp2 = (_luminance < 0.5)
 182            ? _luminance * (1.0 + _saturation)
 183            : (_luminance + _saturation) - (_luminance * _saturation);
 184         double tmp1 = 2.0 * _luminance - tmp2;
 185
 186         double tmp3R = _hue + 120.0;
 187         if(tmp3R > 360.0)
 188             tmp3R -= 360.0;
 189         if(tmp3R < 60.0)
 190             red = tmp1 + (tmp2 - tmp1) * tmp3R / 60.0;
 191         else if(tmp3R < 180.0)
 192             red = tmp2;
 193         else if(tmp3R < 240.0)
 194             red = tmp1 + (tmp2 - tmp1) * (240.0 - tmp3R) / 60.0;
 195         else
 196             red = tmp1;
 197
 198         double tmp3G = _hue;
 199         if(tmp3G > 360.0)
 200             tmp3G -= 360.0;
 201         if(tmp3G < 60.0)
 202             green = tmp1 + (tmp2 - tmp1) * tmp3G / 60.0;
 203         else if(tmp3G < 180.0)
 204             green = tmp2;
 205         else if(tmp3G < 240.0)
 206             green = tmp1 + (tmp2 - tmp1) * (240.0 - tmp3G) / 60.0;
 207         else
 208             green = tmp1;
 209
 210         double tmp3B = _hue + 240.0;
 211         if(tmp3B > 360.0)
 212             tmp3B -= 360.0;
 213         if(tmp3B < 60.0)
 214             blue = tmp1 + (tmp2 - tmp1) * tmp3B / 60.0;
 215         else if(tmp3B < 180.0)
 216             blue = tmp2;
 217         else if(tmp3B < 240.0)
 218             blue = tmp1 + (tmp2 - tmp1) * (240.0 - tmp3B) / 60.0;
 219         else
 220             blue = tmp1;
 221     }
 222     return wxColour(
 223         (unsigned char)(red * 255.0),
 224         (unsigned char)(green * 255.0),
 225         (unsigned char)(blue * 255.0));
 226 }
 227
 228 wxRibbonHSLColour wxRibbonHSLColour::Darker(float delta) const
 229 {
 230     return Lighter(-delta);
 231 }
 232
 233 wxRibbonHSLColour& wxRibbonHSLColour::MakeDarker(float delta)
 234 {
 235     luminance -= delta;
 236     return *this;
 237 }
 238
 239 wxRibbonHSLColour wxRibbonHSLColour::Lighter(float delta) const
 240 {
 241     return wxRibbonHSLColour(hue, saturation, luminance + delta);
 242 }
 243
 244 wxRibbonHSLColour wxRibbonHSLColour::Saturated(float delta) const
 245 {
 246     return wxRibbonHSLColour(hue, saturation + delta, luminance);
 247 }
 248
 249 wxRibbonHSLColour wxRibbonHSLColour::Desaturated(float delta) const
 250 {
 251     return Saturated(-delta);
 252 }
 253
 254 wxRibbonHSLColour wxRibbonHSLColour::ShiftHue(float delta) const
 255 {
 256     return wxRibbonHSLColour(hue + delta, saturation, luminance);
 257 }
 258
 259 #endif // wxUSE_RIBBON