1 /* 2 * Copyright 2010-2011, Haiku, Inc. All Rights Reserved. 3 * Distributed under the terms of the MIT license. 4 * 5 * Authors: 6 * Deyan Genovski, deangenovski@gmail.com 7 * Geoffry Song, goffrie@gmail.com 8 */ 9 #include "Leaves.h" 10 11 #include <stdlib.h> 12 #include <time.h> 13 14 #include <AffineTransform.h> 15 #include <GradientLinear.h> 16 #include <Shape.h> 17 #include <Slider.h> 18 #include <TextView.h> 19 20 21 // path data for the leaf shape 22 static const BPoint kLeafBegin(56.24793f, 15.46287f); 23 static BPoint kLeafCurves[][3] = { 24 { BPoint(61.14, 28.89), BPoint(69.78, 38.25), BPoint(83.48, 44.17) }, 25 { BPoint(99.46, 37.52), BPoint(113.27, 29.61), BPoint(134.91, 30.86) }, 26 { BPoint(130.58, 36.53), BPoint(126.74, 42.44), BPoint(123.84, 48.81) }, 27 { BPoint(131.81, 42.22), BPoint(137.53, 38.33), BPoint(144.37, 33.10) }, 28 { BPoint(169.17, 23.55), BPoint(198.90, 15.55), BPoint(232.05, 10.51) }, 29 { BPoint(225.49, 18.37), BPoint(219.31, 28.17), BPoint(217.41, 40.24) }, 30 { BPoint(227.70, 26.60), BPoint(239.97, 14.63), BPoint(251.43, 8.36) }, 31 { BPoint(288.89, 9.12), BPoint(322.73, 14.33), BPoint(346.69, 31.67) }, 32 { BPoint(330.49, 37.85), BPoint(314.36, 44.25), BPoint(299.55, 54.17) }, 33 { BPoint(292.48, 52.54), BPoint(289.31, 49.70), BPoint(285.62, 47.03) }, 34 { BPoint(283.73, 54.61), BPoint(284.46, 57.94), BPoint(285.62, 60.60) }, 35 { BPoint(259.78, 76.14), BPoint(233.24, 90.54), BPoint(202.41, 98.10) }, 36 { BPoint(194.43, 95.36), BPoint(185.96, 92.39), BPoint(179.63, 88.33) }, 37 { BPoint(180.15, 94.75), BPoint(182.73, 99.76), BPoint(185.62, 104.53) }, 38 { BPoint(154.83, 119.46), BPoint(133.21, 118.97), BPoint(125.62, 94.88) }, 39 { BPoint(124.70, 98.79), BPoint(124.11, 103.67), BPoint(124.19, 110.60) }, 40 { BPoint(116.42, 111.81), BPoint(85.82, 99.60), BPoint(83.25, 51.96) }, 41 { BPoint(62.50, 42.57), BPoint(58.12, 33.18), BPoint(50.98, 23.81) } }; 42 static const int kLeafCurveCount = sizeof(kLeafCurves) / sizeof(kLeafCurves[0]); 43 static const float kLeafWidth = 372.f; 44 static const float kLeafHeight = 121.f; 45 46 // leaf colors 47 static const rgb_color kColors[][2] = { 48 { {255, 114, 0, 255}, {255, 159, 0, 255} }, 49 { {50, 160, 40, 255}, {125, 210, 32, 255} }, 50 { {250, 190, 30, 255}, {255, 214, 125, 255} } }; 51 static const int kColorCount = sizeof(kColors) / sizeof(kColors[0]); 52 53 // bounds for settings 54 static const int kMinimumDropRate = 2, kMaximumDropRate = 50; 55 static const int kMinimumLeafSize = 50, kMaximumLeafSize = 1000; 56 static const int kMaximumSizeVariation = 200; 57 58 enum { 59 MSG_SET_DROP_RATE = 'drop', 60 MSG_SET_LEAF_SIZE = 'size', 61 MSG_SET_SIZE_VARIATION = 'svry', 62 }; 63 64 65 extern "C" BScreenSaver* 66 instantiate_screen_saver(BMessage* msg, image_id image) 67 { 68 return new Leaves(msg, image); 69 } 70 71 72 Leaves::Leaves(BMessage* archive, image_id id) 73 : 74 BScreenSaver(archive, id), 75 fDropRateSlider(NULL), 76 fLeafSizeSlider(NULL), 77 fSizeVariationSlider(NULL), 78 fDropRate(10), 79 fLeafSize(150), 80 fSizeVariation(50) 81 { 82 if (archive) { 83 if (archive->FindInt32("Leaves drop rate", &fDropRate) != B_OK) 84 fDropRate = 10; 85 if (archive->FindInt32("Leaves size", &fLeafSize) != B_OK) 86 fLeafSize = 150; 87 if (archive->FindInt32("Leaves variation", &fSizeVariation) != B_OK) 88 fSizeVariation = 50; 89 } 90 } 91 92 93 void 94 Leaves::StartConfig(BView* view) 95 { 96 BRect bounds = view->Bounds(); 97 bounds.InsetBy(10, 10); 98 BRect frame(0, 0, bounds.Width(), 20); 99 100 fDropRateSlider = new BSlider(frame, "drop rate", "Drop rate:", 101 new BMessage(MSG_SET_DROP_RATE), kMinimumDropRate, kMaximumDropRate, 102 B_BLOCK_THUMB, B_FOLLOW_LEFT_RIGHT | B_FOLLOW_BOTTOM); 103 fDropRateSlider->SetValue(fDropRate); 104 fDropRateSlider->ResizeToPreferred(); 105 bounds.bottom -= fDropRateSlider->Bounds().Height() * 1.5; 106 fDropRateSlider->MoveTo(bounds.LeftBottom()); 107 view->AddChild(fDropRateSlider); 108 109 fLeafSizeSlider = new BSlider(frame, "leaf size", "Leaf size:", 110 new BMessage(MSG_SET_LEAF_SIZE), kMinimumLeafSize, kMaximumLeafSize, 111 B_BLOCK_THUMB, B_FOLLOW_LEFT_RIGHT | B_FOLLOW_BOTTOM); 112 fLeafSizeSlider->SetValue(fLeafSize); 113 fLeafSizeSlider->ResizeToPreferred(); 114 bounds.bottom -= fLeafSizeSlider->Bounds().Height() * 1.5; 115 fLeafSizeSlider->MoveTo(bounds.LeftBottom()); 116 view->AddChild(fLeafSizeSlider); 117 118 fSizeVariationSlider = new BSlider(frame, "variation", "Size variation:", 119 new BMessage(MSG_SET_SIZE_VARIATION), 0, kMaximumSizeVariation, 120 B_BLOCK_THUMB, B_FOLLOW_LEFT_RIGHT | B_FOLLOW_BOTTOM); 121 fSizeVariationSlider->SetValue(fSizeVariation); 122 fSizeVariationSlider->ResizeToPreferred(); 123 bounds.bottom -= fSizeVariationSlider->Bounds().Height() * 1.5; 124 fSizeVariationSlider->MoveTo(bounds.LeftBottom()); 125 view->AddChild(fSizeVariationSlider); 126 127 BTextView* textView = new BTextView(bounds, B_EMPTY_STRING, 128 bounds.OffsetToCopy(0., 0.), B_FOLLOW_ALL, B_WILL_DRAW); 129 textView->SetViewColor(view->ViewColor()); 130 textView->Insert("Leaves\n\n" 131 "by Deyan Genovski, Geoffry Song\n\n"); 132 textView->SetStylable(true); 133 textView->SetFontAndColor(0, 6, be_bold_font); 134 textView->MakeEditable(false); 135 view->AddChild(textView); 136 137 BWindow* window = view->Window(); 138 if (window) window->AddHandler(this); 139 140 fDropRateSlider->SetTarget(this); 141 fLeafSizeSlider->SetTarget(this); 142 fSizeVariationSlider->SetTarget(this); 143 } 144 145 146 status_t 147 Leaves::StartSaver(BView* view, bool preview) 148 { 149 SetTickSize(10000000 / fDropRate); 150 srand48(time(NULL)); 151 152 view->SetLineMode(B_ROUND_CAP, B_ROUND_JOIN); 153 154 return B_OK; 155 } 156 157 158 status_t 159 Leaves::SaveState(BMessage* into) const 160 { 161 status_t status; 162 if ((status = into->AddInt32("Leaves drop rate", fDropRate)) != B_OK) 163 return status; 164 if ((status = into->AddInt32("Leaves size", fLeafSize)) != B_OK) 165 return status; 166 if ((status = into->AddInt32("Leaves variation", fSizeVariation)) != B_OK) 167 return status; 168 return B_OK; 169 } 170 171 172 void 173 Leaves::MessageReceived(BMessage* message) 174 { 175 switch (message->what) { 176 case MSG_SET_DROP_RATE: 177 fDropRate = fDropRateSlider->Value(); 178 break; 179 case MSG_SET_LEAF_SIZE: 180 fLeafSize = fLeafSizeSlider->Value(); 181 break; 182 case MSG_SET_SIZE_VARIATION: 183 fSizeVariation = fSizeVariationSlider->Value(); 184 break; 185 default: 186 BHandler::MessageReceived(message); 187 } 188 } 189 190 191 void 192 Leaves::Draw(BView* view, int32 frame) 193 { 194 float scale = fLeafSize / kLeafWidth / (kMaximumLeafSize * 2); 195 scale *= view->Bounds().Width(); 196 scale += scale * drand48() * fSizeVariation / 100.; 197 198 BAffineTransform transform; 199 transform.TranslateBy(-kLeafWidth / 2, -kLeafHeight / 2); 200 // draw the leaf centered on the point 201 transform.RotateBy(drand48() * 2. * M_PI); 202 if ((rand() & 64) == 0) transform.ScaleBy(-1., 1.); 203 // flip half of the time 204 transform.ScaleBy(scale); 205 transform.TranslateBy(_RandomPoint(view->Bounds())); 206 207 BPoint center = transform.Apply(BPoint(kLeafWidth / 2, kLeafHeight / 2)); 208 BPoint gradientOffset = BPoint(60 * scale, 80 * scale); 209 BGradientLinear gradient(center - gradientOffset, center + gradientOffset); 210 int color = (rand() / 7) % kColorCount; 211 gradient.AddColor(kColors[color][0], 0.f); 212 gradient.AddColor(kColors[color][1], 255.f); 213 214 BShape leafShape; 215 leafShape.MoveTo(transform.Apply(kLeafBegin)); 216 for (int i = 0; i < kLeafCurveCount; ++i) { 217 BPoint control[3]; 218 for (int j = 0; j < 3; ++j) 219 control[j] = transform.Apply(kLeafCurves[i][j]); 220 leafShape.BezierTo(control); 221 } 222 leafShape.Close(); 223 224 view->PushState(); 225 view->SetDrawingMode(B_OP_ALPHA); 226 view->SetHighColor(0, 0, 0, 50); 227 for (int i = 2; i >= 0; --i) { 228 view->SetOrigin(i * 0.1, i * 0.3); 229 view->SetPenSize(i * 2); 230 view->StrokeShape(&leafShape); 231 } 232 view->PopState(); 233 view->FillShape(&leafShape, gradient); 234 } 235 236 237 inline BPoint 238 Leaves::_RandomPoint(const BRect& bound) 239 { 240 return BPoint(drand48() * (bound.right - bound.left) + bound.left, 241 drand48() * (bound.bottom - bound.top) + bound.top); 242 } 243 244