1Screen class 2############ 3 4The Screen class handles all infrastructure needed for each 5monitor/video card pair. The Workspace class holds data and supplies 6the infrastructure for drawing the screen. 7 8Member Functions 9================ 10 11Screen(DisplayDriver \*gfxmodule, uint8 workspaces) 12--------------------------------------------------- 13 141. Set driver pointer to gfxmodule 152. If driver pointer is non-NULL and driver->Initialize() is true, set 16 initialized flag to true 173. If initialized, get the appropriate display driver info and save it 18 internally 194. Create and populate workspace list 205. Clear all workspaces 21 22 23~Screen(void) 24------------- 25 261. Remove all workspaces from the list and delete them 272. Delete the workspace list 28 29void AddWorkspace(int32 index=-1) 30--------------------------------- 31 32Adds a workspace to the screen object, setting its settings to the 33default, and adding it to the list in the specified index or the end 34of the list if the index is -1 35 36 371. Create a workspace object 382. Add it to the workspace list - to the end if the index is -1, and to 39 the particular index if not 40 41void DeleteWorkspace(int32 index) 42--------------------------------- 43 44Deletes the workspace at the specified index. 45 46 471. Remove the item at the specified index and if non-NULL, delete it. 48 49int32 CountWorkspaces(void) 50--------------------------- 51 52Returns the number of workspaces kept by the particular Screen objects 53 541. Return the workspace list's CountItems() value 55 56void SetWorkspaceCount(int32 count) 57----------------------------------- 58 59Sets the number of workspaces available to count. If count is less 60than the number of current workspaces, the last workspaces are deleted 61first. Workspaces are added to the end of the list. If a delete 62workspace should include the active workspace, then the workspace with 63the index count-1 is activated. There must be at least one workspace. 64 651. if count equals the workspace list's CountItems value, return 662. If count is less than 1, set count to 1. If greater than 32, set to 32. 673. If active workspace index is greater than count-1, call SetWorkspace(count-1) 684. If count is greater than the workspace list's CountItems value, call 69 AddWorkspace the appropriate number of times. 705. If count is less than the workspace list's CountItems, call 71 RemoveWorkspace the appropriate number of times 72 73int32 CurrentWorkspace(void) 74---------------------------- 75 76Returns the active workspace index 77 78void SetWorkspace(int32 workspace) 79---------------------------------- 80 81void Activate(bool active=true) 82------------------------------- 83 84DisplayDriver \*GetDriver(void) 85------------------------------- 86 87status_t SetSpace(int32 index, int32 res, bool stick=true) 88---------------------------------------------------------- 89 90void AddWindow(ServerWindow \*win, int32 workspace=B_CURRENT_WORKSPACE) 91----------------------------------------------------------------------- 92 93void RemoveWindow(ServerWindow \*win) 94------------------------------------- 95 96ServerWindow \*ActiveWindow(void) 97--------------------------------- 98 99void SetActiveWindow(ServerWindow \*win) 100---------------------------------------- 101 102Layer \*GetRootLayer(int32 workspace=B_CURRENT_WORKSPACE) 103--------------------------------------------------------- 104 105bool IsInitialized(void) 106------------------------ 107 108Workspace \*GetActiveWorkspace(void) 109------------------------------------ 110 111Workspace class members 112======================= 113 114Workspace(void) 115--------------- 116 1171. Set background color to RGB(51,102,160) 1182. Copy frame_buffer_info and graphics_card_info structure values 1193. Create a RootLayer object using the values from the two structures 120 121~Workspace(void) 122---------------- 123 1241. Call the RootLayer object's PruneTree method and delete it 125 126void SetBGColor(const RGBColor &c) 127---------------------------------- 128 129Sets the particular color for the workspace. Note that this does not 130refresh the display. 131 1321. Set the internal background RGBColor object to the color parameter 133 134RGBColor BGColor(void) 135---------------------- 136 137Returns the internal background color 138 139 140RootLayer \*GetRoot(void) 141------------------------- 142 143Returns the pointer to the RootLayer object 144 145 146void SetData(graphics_card_info \*gcinfo, frame_buffer_info \*fbinfo) 147--------------------------------------------------------------------- 148 149Changes the graphics data and resizes the RootLayer accordingly. 150 151 1521. Copy the two structures to the internal one 1532. Resize the RootLayer 1543. If the RootLayer was resized larger, Invalidate the new areas 155 156 157void GetData(graphics_card_info \*gcinfo, frame_buffer_info \*fbinfo) 158--------------------------------------------------------------------- 159 160Copies the two data structures into the parameters passed. 161 162RootLayer class members 163======================= 164 165RootLayer(BRect frame, const char \*name) 166 167 1681. passes B_FOLLOW_NONE to Layer constructor 1692. set level to 0 1703. set the background color to the color for the workspace set in the 171 system preferences 172 173 174~RootLayer(void) 175---------------- 176 177Does nothing. 178 179 180void RequestDraw(const BRect &r) 181-------------------------------- 182 183Requests that the layer be drawn on screen. The rectangle passed is in 184the layer's own coordinates. 185 186 1871. call the display driver's FillRect on the rectangle, filling with 188 the layer's background color 1892. recurse through each child and call its RequestDraw() function if it 190 intersects the child's frame 191 192void MoveBy(BPoint pt), void MoveBy(float x, float y) 193----------------------------------------------------- 194 195Made empty so that the root layer cannot be moved 196 197void SetDriver(DisplayDriver \*d) 198--------------------------------- 199 200Assigns a particular display driver object to the root layer if 201non-NULL. 202 203 204void RebuildRegions(bool recursive=false) 205----------------------------------------- 206 207Rebuilds the visible and invalid layers based on the layer hierarchy. 208Used to update the regions after a call to remove or add a child layer 209is made or when a layer is hidden or shown. 210 211 2121. get the frame 2132. set full and visible regions to frame 2143. iterate through each child and exclude its full region from the 215 visible region if the child is visible. 216 217