src/add-ons/screen_savers/gravity/RainbowItem.cpp

   1 /*
   2  * Copyright 2016 Haiku, Inc. All rights reserved.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *              John Scipione, jscipione@gmail.com
   7  */
   8
   9
  10 #include "RainbowItem.h"
  11
  12 #include <math.h>
  13
  14 #include <ControlLook.h>
  15 #include <GradientLinear.h>
  16 #include <InterfaceDefs.h>
  17 #include <View.h>
  18
  19
  20 // golden ratio
  21 #ifdef M_PHI
  22 #       undef M_PHI
  23 #endif
  24 #define M_PHI 1.61803398874989484820
  25
  26
  27 //      #pragma mark - RainbowItem
  28
  29
  30 RainbowItem::RainbowItem(const char* string)
  31         :
  32         BStringItem(string, 0, false)
  33 {
  34 }
  35
  36
  37 void
  38 RainbowItem::DrawItem(BView* owner, BRect frame, bool complete)
  39 {
  40         rgb_color highColor = owner->HighColor();
  41         rgb_color lowColor = owner->LowColor();
  42
  43         if (IsSelected() || complete) {
  44                 if (IsSelected()) {
  45                         owner->SetHighUIColor(B_LIST_SELECTED_BACKGROUND_COLOR);
  46                         owner->SetLowColor(owner->HighColor());
  47                 } else
  48                         owner->SetHighColor(lowColor);
  49
  50                 owner->FillRect(frame);
  51         }
  52
  53         float spacer = ceilf(be_control_look->DefaultItemSpacing() / 2);
  54
  55         BRect colorRect(frame);
  56         colorRect.InsetBy(2.0f, 2.0f);
  57         colorRect.left += spacer;
  58         colorRect.right = colorRect.left + floorf(colorRect.Height() * M_PHI);
  59
  60         // draw the rainbow
  61         BGradientLinear gradient;
  62         gradient.AddColor((rgb_color){ 255, 65,  54  }, 0);   // red
  63         gradient.AddColor((rgb_color){ 255, 133, 27  }, 60);  // orange
  64         gradient.AddColor((rgb_color){ 255, 220, 0   }, 102); // yellow
  65         gradient.AddColor((rgb_color){ 46,  204, 64  }, 153); // green
  66         gradient.AddColor((rgb_color){ 0,   116, 217 }, 195); // blue
  67         // indigo ;)
  68         gradient.AddColor((rgb_color){ 177, 13,  201 }, 255); // violet
  69         gradient.SetStart(colorRect.LeftTop());
  70         gradient.SetEnd(colorRect.RightBottom());
  71         owner->FillRect(colorRect, gradient);
  72
  73         // draw the border
  74         owner->SetHighUIColor(B_CONTROL_BORDER_COLOR);
  75         owner->StrokeRect(colorRect);
  76
  77         // draw the string
  78         owner->MovePenTo(colorRect.right + spacer, frame.top + BaselineOffset());
  79
  80         if (!IsEnabled()) {
  81                 rgb_color textColor = ui_color(B_LIST_ITEM_TEXT_COLOR);
  82                 if (textColor.red + textColor.green + textColor.blue > 128 * 3)
  83                         owner->SetHighColor(tint_color(textColor, B_DARKEN_2_TINT));
  84                 else
  85                         owner->SetHighColor(tint_color(textColor, B_LIGHTEN_2_TINT));
  86         } else {
  87                 if (IsSelected())
  88                         owner->SetHighUIColor(B_LIST_SELECTED_ITEM_TEXT_COLOR);
  89                 else
  90                         owner->SetHighUIColor(B_LIST_ITEM_TEXT_COLOR);
  91         }
  92
  93         owner->DrawString(Text());
  94
  95         owner->SetHighColor(highColor);
  96         owner->SetLowColor(lowColor);
  97 }