1 /* 2 Open Tracker License 3 4 Terms and Conditions 5 6 Copyright (c) 1991-2000, Be Incorporated. All rights reserved. 7 8 Permission is hereby granted, free of charge, to any person obtaining a copy of 9 this software and associated documentation files (the "Software"), to deal in 10 the Software without restriction, including without limitation the rights to 11 use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies 12 of the Software, and to permit persons to whom the Software is furnished to do 13 so, subject to the following conditions: 14 15 The above copyright notice and this permission notice applies to all licensees 16 and shall be included in all copies or substantial portions of the Software. 17 18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF TITLE, MERCHANTABILITY, 20 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 21 BE INCORPORATED BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 22 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF, OR IN CONNECTION 23 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 24 25 Except as contained in this notice, the name of Be Incorporated shall not be 26 used in advertising or otherwise to promote the sale, use or other dealings in 27 this Software without prior written authorization from Be Incorporated. 28 29 Tracker(TM), Be(R), BeOS(R), and BeIA(TM) are trademarks or registered trademarks 30 of Be Incorporated in the United States and other countries. Other brand product 31 names are registered trademarks or trademarks of their respective holders. 32 All rights reserved. 33 */ 34 35 // Classes used for setting up and managing background images 36 37 38 #include <Bitmap.h> 39 #include <ControlLook.h> 40 #include <Node.h> 41 #include <TranslationKit.h> 42 #include <View.h> 43 #include <Window.h> 44 45 #include <fs_attr.h> 46 47 #include "BackgroundImage.h" 48 49 #include "Background.h" 50 #include "Commands.h" 51 #include "PoseView.h" 52 53 54 namespace BPrivate { 55 56 const char* kBackgroundImageInfo = B_BACKGROUND_INFO; 57 const char* kBackgroundImageInfoOffset = B_BACKGROUND_ORIGIN; 58 const char* kBackgroundImageInfoTextOutline = B_BACKGROUND_TEXT_OUTLINE; 59 const char* kBackgroundImageInfoMode = B_BACKGROUND_MODE; 60 const char* kBackgroundImageInfoWorkspaces = B_BACKGROUND_WORKSPACES; 61 const char* kBackgroundImageInfoPath = B_BACKGROUND_IMAGE; 62 63 } // namespace BPrivate 64 65 66 BackgroundImage* 67 BackgroundImage::GetBackgroundImage(const BNode* node, bool isDesktop) 68 { 69 attr_info info; 70 if (node->GetAttrInfo(kBackgroundImageInfo, &info) != B_OK) 71 return NULL; 72 73 BMessage container; 74 char* buffer = new char[info.size]; 75 76 status_t error = node->ReadAttr(kBackgroundImageInfo, info.type, 0, 77 buffer, (size_t)info.size); 78 if (error == info.size) 79 error = container.Unflatten(buffer); 80 81 delete[] buffer; 82 83 if (error != B_OK) 84 return NULL; 85 86 BackgroundImage* result = NULL; 87 for (int32 index = 0; ; index++) { 88 const char* path; 89 uint32 workspaces = B_ALL_WORKSPACES; 90 Mode mode = kTiled; 91 bool textWidgetLabelOutline = false; 92 BPoint offset; 93 BBitmap* bitmap = NULL; 94 95 if (container.FindString(kBackgroundImageInfoPath, index, &path) 96 == B_OK) { 97 bitmap = BTranslationUtils::GetBitmap(path); 98 if (!bitmap) { 99 PRINT(("failed to load background bitmap from path\n")); 100 continue; 101 } 102 } else 103 break; 104 105 if (be_control_look != NULL && isDesktop) { 106 be_control_look->SetBackgroundInfo(container); 107 } 108 109 container.FindInt32(kBackgroundImageInfoWorkspaces, index, 110 (int32*)&workspaces); 111 container.FindInt32(kBackgroundImageInfoMode, index, (int32*)&mode); 112 container.FindBool(kBackgroundImageInfoTextOutline, index, 113 &textWidgetLabelOutline); 114 container.FindPoint(kBackgroundImageInfoOffset, index, &offset); 115 116 BackgroundImage::BackgroundImageInfo* imageInfo = new 117 BackgroundImage::BackgroundImageInfo(workspaces, bitmap, mode, 118 offset, textWidgetLabelOutline); 119 120 if (!result) 121 result = new BackgroundImage(node, isDesktop); 122 123 result->Add(imageInfo); 124 } 125 return result; 126 } 127 128 129 BackgroundImage::BackgroundImageInfo::BackgroundImageInfo(uint32 workspaces, 130 BBitmap* bitmap, Mode mode, BPoint offset, bool textWidgetOutline) 131 : fWorkspace(workspaces), 132 fBitmap(bitmap), 133 fMode(mode), 134 fOffset(offset), 135 fTextWidgetOutline(textWidgetOutline) 136 { 137 } 138 139 140 BackgroundImage::BackgroundImageInfo::~BackgroundImageInfo() 141 { 142 delete fBitmap; 143 } 144 145 146 BackgroundImage::BackgroundImage(const BNode* node, bool desktop) 147 : fIsDesktop(desktop), 148 fDefinedByNode(*node), 149 fView(NULL), 150 fShowingBitmap(NULL), 151 fBitmapForWorkspaceList(1, true) 152 { 153 } 154 155 156 BackgroundImage::~BackgroundImage() 157 { 158 } 159 160 161 void 162 BackgroundImage::Add(BackgroundImageInfo* info) 163 { 164 fBitmapForWorkspaceList.AddItem(info); 165 } 166 167 168 void 169 BackgroundImage::Show(BView* view, int32 workspace) 170 { 171 fView = view; 172 173 BackgroundImageInfo* info = ImageInfoForWorkspace(workspace); 174 if (info) { 175 BPoseView* poseView = dynamic_cast<BPoseView*>(fView); 176 if (poseView) 177 poseView->SetWidgetTextOutline(info->fTextWidgetOutline); 178 Show(info, fView); 179 } 180 } 181 182 183 void 184 BackgroundImage::Show(BackgroundImageInfo* info, BView* view) 185 { 186 BPoseView* poseView = dynamic_cast<BPoseView*>(view); 187 if (poseView) 188 poseView->SetWidgetTextOutline(info->fTextWidgetOutline); 189 190 if (info->fBitmap == NULL) { 191 view->ClearViewBitmap(); 192 view->Invalidate(); 193 fShowingBitmap = info; 194 return; 195 } 196 BRect viewBounds(view->Bounds()); 197 BRect bitmapBounds(info->fBitmap->Bounds()); 198 BRect destinationBitmapBounds(bitmapBounds); 199 200 uint32 options = 0; 201 uint32 followFlags = B_FOLLOW_TOP | B_FOLLOW_LEFT; 202 203 // figure out the display mode and the destination bounds for the bitmap 204 switch (info->fMode) { 205 case kCentered: 206 if (fIsDesktop) { 207 destinationBitmapBounds.OffsetBy( 208 (viewBounds.Width() - bitmapBounds.Width()) / 2, 209 (viewBounds.Height() - bitmapBounds.Height()) / 2); 210 break; 211 } 212 // else fall thru 213 case kScaledToFit: 214 if (fIsDesktop) { 215 if (BRectRatio(destinationBitmapBounds) 216 >= BRectRatio(viewBounds)) { 217 float overlap = BRectHorizontalOverlap(viewBounds, 218 destinationBitmapBounds); 219 destinationBitmapBounds.Set(-overlap, 0, 220 viewBounds.Width() + overlap, viewBounds.Height()); 221 } else { 222 float overlap = BRectVerticalOverlap(viewBounds, 223 destinationBitmapBounds); 224 destinationBitmapBounds.Set(0, -overlap, 225 viewBounds.Width(), viewBounds.Height() + overlap); 226 } 227 followFlags = B_FOLLOW_ALL; 228 options |= B_FILTER_BITMAP_BILINEAR; 229 break; 230 } 231 // else fall thru 232 case kAtOffset: 233 destinationBitmapBounds.OffsetTo(info->fOffset); 234 break; 235 case kTiled: 236 if (fIsDesktop) { 237 destinationBitmapBounds.OffsetBy( 238 (viewBounds.Width() - bitmapBounds.Width()) / 2, 239 (viewBounds.Height() - bitmapBounds.Height()) / 2); 240 } 241 options |= B_TILE_BITMAP; 242 break; 243 } 244 245 // switch to the bitmap and force a redraw 246 view->SetViewBitmap(info->fBitmap, bitmapBounds, destinationBitmapBounds, 247 followFlags, options); 248 view->Invalidate(); 249 fShowingBitmap = info; 250 } 251 252 253 float 254 BackgroundImage::BRectRatio(BRect rect) 255 { 256 return rect.Width() / rect.Height(); 257 } 258 259 260 float 261 BackgroundImage::BRectHorizontalOverlap(BRect hostRect, BRect resizedRect) 262 { 263 return ((hostRect.Height() / resizedRect.Height() * resizedRect.Width()) 264 - hostRect.Width()) / 2; 265 } 266 267 268 float 269 BackgroundImage::BRectVerticalOverlap(BRect hostRect, BRect resizedRect) 270 { 271 return ((hostRect.Width() / resizedRect.Width() * resizedRect.Height()) 272 - hostRect.Height()) / 2; 273 } 274 275 276 void 277 BackgroundImage::Remove() 278 { 279 if (fShowingBitmap) { 280 fView->ClearViewBitmap(); 281 fView->Invalidate(); 282 BPoseView* poseView = dynamic_cast<BPoseView*>(fView); 283 // make sure text widgets draw the default way, erasing 284 // their background 285 if (poseView) 286 poseView->SetWidgetTextOutline(true); 287 } 288 fShowingBitmap = NULL; 289 } 290 291 292 BackgroundImage::BackgroundImageInfo* 293 BackgroundImage::ImageInfoForWorkspace(int32 workspace) const 294 { 295 uint32 workspaceMask = 1; 296 297 for ( ; workspace; workspace--) 298 workspaceMask *= 2; 299 300 int32 count = fBitmapForWorkspaceList.CountItems(); 301 302 // do a simple lookup for the most likely candidate bitmap - 303 // pick the imageInfo that is only defined for this workspace over one 304 // that supports multiple workspaces 305 BackgroundImageInfo* result = NULL; 306 for (int32 index = 0; index < count; index++) { 307 BackgroundImageInfo* info = fBitmapForWorkspaceList.ItemAt(index); 308 if (info->fWorkspace == workspaceMask) 309 return info; 310 if (info->fWorkspace & workspaceMask) 311 result = info; 312 } 313 314 return result; 315 } 316 317 318 void 319 BackgroundImage::WorkspaceActivated(BView* view, int32 workspace, bool state) 320 { 321 if (!fIsDesktop) 322 // we only care for desktop bitmaps 323 return; 324 325 if (!state) 326 // we only care comming into a new workspace, not leaving one 327 return; 328 329 BackgroundImageInfo* info = ImageInfoForWorkspace(workspace); 330 331 if (info != fShowingBitmap) { 332 if (info) 333 Show(info, view); 334 else { 335 if (BPoseView* poseView = dynamic_cast<BPoseView*>(view)) 336 poseView->SetWidgetTextOutline(true); 337 view->ClearViewBitmap(); 338 view->Invalidate(); 339 } 340 fShowingBitmap = info; 341 } 342 } 343 344 345 void 346 BackgroundImage::ScreenChanged(BRect, color_space) 347 { 348 if (!fIsDesktop || !fShowingBitmap) 349 return; 350 351 if (fShowingBitmap->fMode == kCentered) { 352 BRect viewBounds(fView->Bounds()); 353 BRect bitmapBounds(fShowingBitmap->fBitmap->Bounds()); 354 BRect destinationBitmapBounds(bitmapBounds); 355 destinationBitmapBounds.OffsetBy( 356 (viewBounds.Width() - bitmapBounds.Width()) / 2, 357 (viewBounds.Height() - bitmapBounds.Height()) / 2); 358 359 fView->SetViewBitmap(fShowingBitmap->fBitmap, bitmapBounds, 360 destinationBitmapBounds, B_FOLLOW_NONE, 0); 361 fView->Invalidate(); 362 } 363 } 364 365 366 BackgroundImage* 367 BackgroundImage::Refresh(BackgroundImage* oldBackgroundImage, 368 const BNode* fromNode, bool desktop, BPoseView* poseView) 369 { 370 if (oldBackgroundImage) { 371 oldBackgroundImage->Remove(); 372 delete oldBackgroundImage; 373 } 374 375 BackgroundImage* result = GetBackgroundImage(fromNode, desktop); 376 if (result && poseView->ViewMode() != kListMode) 377 result->Show(poseView, current_workspace()); 378 379 return result; 380 } 381