src/preferences/appearance/ColorWhichListView.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 "ColorWhichListView.h"
  11
  12 #include <algorithm>
  13
  14 #include <math.h>
  15 #include <stdio.h>
  16
  17 #include <Bitmap.h>
  18
  19 #include "ColorWhichItem.h"
  20
  21
  22 // golden ratio
  23 #ifdef M_PHI
  24 #       undef M_PHI
  25 #endif
  26 #define M_PHI 1.61803398874989484820
  27
  28
  29 //      #pragma mark - ColorWhichListView
  30
  31
  32 ColorWhichListView::ColorWhichListView(const char* name,
  33         list_view_type type, uint32 flags)
  34         :
  35         BListView(name, type, flags)
  36 {
  37 }
  38
  39
  40 ColorWhichListView::~ColorWhichListView()
  41 {
  42 }
  43
  44
  45 bool
  46 ColorWhichListView::InitiateDrag(BPoint where, int32 index, bool wasSelected)
  47 {
  48         ColorWhichItem* colorWhichItem
  49                 = dynamic_cast<ColorWhichItem*>(ItemAt(index));
  50         if (colorWhichItem == NULL)
  51                 return false;
  52
  53         rgb_color color = colorWhichItem->Color();
  54
  55         char hexString[7];
  56         sprintf(hexString, "#%.2X%.2X%.2X", color.red, color.green, color.blue);
  57
  58         BMessage message(B_PASTE);
  59         message.AddData("text/plain", B_MIME_TYPE, &hexString, sizeof(hexString));
  60         message.AddData("RGBColor", B_RGB_COLOR_TYPE, &color, sizeof(color));
  61
  62         float itemHeight = colorWhichItem->Height() - 5;
  63         BRect rect(0.0f, 0.0f, roundf(itemHeight * M_PHI) - 1, itemHeight - 1);
  64
  65         BBitmap* bitmap = new BBitmap(rect, B_RGB32, true);
  66         if (bitmap->Lock()) {
  67                 BView* view = new BView(rect, "", B_FOLLOW_NONE, B_WILL_DRAW);
  68                 bitmap->AddChild(view);
  69
  70                 view->SetHighColor(B_TRANSPARENT_COLOR);
  71                 view->FillRect(view->Bounds());
  72
  73                 ++rect.top;
  74                 ++rect.left;
  75
  76                 view->SetHighColor(0, 0, 0, 100);
  77                 view->FillRect(rect);
  78                 rect.OffsetBy(-1.0f, -1.0f);
  79
  80                 view->SetHighColor(std::min(255, (int)(1.2 * color.red + 40)),
  81                         std::min(255, (int)(1.2 * color.green + 40)),
  82                         std::min(255, (int)(1.2 * color.blue + 40)));
  83                 view->StrokeRect(rect);
  84
  85                 ++rect.left;
  86                 ++rect.top;
  87
  88                 view->SetHighColor((int32)(0.8 * color.red),
  89                         (int32)(0.8 * color.green),
  90                         (int32)(0.8 * color.blue));
  91                 view->StrokeRect(rect);
  92
  93                 --rect.right;
  94                 --rect.bottom;
  95
  96                 view->SetHighColor(color.red, color.green, color.blue);
  97                 view->FillRect(rect);
  98                 view->Sync();
  99
 100                 bitmap->Unlock();
 101         }
 102
 103         DragMessage(&message, bitmap, B_OP_ALPHA, BPoint(14.0f, 14.0f));
 104
 105         return true;
 106 }