MVP_Model.cs 18 KB

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  1. using System;
  2. using System.Collections.Generic;
  3. using System.Windows;
  4. using System.Linq;
  5. using System.Text;
  6. using System.Threading.Tasks;
  7. using System.Windows.Controls;
  8. using System.Windows.Media;
  9. using System.Windows.Media.Imaging;
  10. namespace SketchAssistantWPF
  11. {
  12. public class MVP_Model
  13. {
  14. /// <summary>
  15. /// The Presenter of the MVP-Model.
  16. /// </summary>
  17. MVP_Presenter programPresenter;
  18. /// <summary>
  19. /// History of Actions
  20. /// </summary>
  21. ActionHistory historyOfActions;
  22. /// <summary>
  23. /// The assistant responsible for the redraw mode
  24. /// </summary>
  25. //RedrawAssistant redrawAss;
  26. /***********************/
  27. /*** CLASS VARIABLES ***/
  28. /***********************/
  29. /// <summary>
  30. /// If the program is in drawing mode.
  31. /// </summary>
  32. bool inDrawingMode;
  33. /// <summary>
  34. /// Size of deletion area
  35. /// </summary>
  36. int deletionRadius = 5;
  37. /// <summary>
  38. /// Size of areas marking endpoints of lines in the redraw mode.
  39. /// </summary>
  40. int markerRadius = 10;
  41. /// <summary>
  42. /// The Position of the Cursor in the right picture box
  43. /// </summary>
  44. Point currentCursorPosition;
  45. /// <summary>
  46. /// The Previous Cursor Position in the right picture box
  47. /// </summary>
  48. Point previousCursorPosition;
  49. /// <summary>
  50. /// Queue for the cursorPositions
  51. /// </summary>
  52. Queue<Point> cursorPositions = new Queue<Point>();
  53. /// <summary>
  54. /// Lookup Matrix for checking postions of lines in the image
  55. /// </summary>
  56. bool[,] isFilledMatrix;
  57. /// <summary>
  58. /// Lookup Matrix for getting line ids at a certain postions of the image
  59. /// </summary>
  60. HashSet<int>[,] linesMatrix;
  61. /// <summary>
  62. /// List of items which will be overlayed over the right canvas.
  63. /// </summary>
  64. List<Tuple<bool, HashSet<Point>>> overlayItems;
  65. /// <summary>
  66. /// Width of the LeftImageBox.
  67. /// </summary>
  68. public int leftImageBoxWidth;
  69. /// <summary>
  70. /// Height of the LeftImageBox.
  71. /// </summary>
  72. public int leftImageBoxHeight;
  73. /// <summary>
  74. /// Width of the RightImageBox.
  75. /// </summary>
  76. public int rightImageBoxWidth;
  77. /// <summary>
  78. /// Height of the RightImageBox.
  79. /// </summary>
  80. public int rightImageBoxHeight;
  81. public ImageDimension leftImageSize { get; private set; }
  82. public ImageDimension rightImageSize { get; private set; }
  83. /// <summary>
  84. /// Indicates whether or not the canvas on the right side is active.
  85. /// </summary>
  86. public bool canvasActive {get; set;}
  87. /// <summary>
  88. /// Indicates if there is a graphic loaded in the left canvas.
  89. /// </summary>
  90. public bool graphicLoaded { get; set; }
  91. /// <summary>
  92. /// Whether or not the mouse is pressed.
  93. /// </summary>
  94. private bool mouseDown;
  95. Image rightImageWithoutOverlay;
  96. List<InternalLine> leftLineList;
  97. List<Tuple<bool, InternalLine>> rightLineList;
  98. List<Point> currentLine = new List<Point>();
  99. public MVP_Model(MVP_Presenter presenter)
  100. {
  101. programPresenter = presenter;
  102. historyOfActions = new ActionHistory();
  103. //redrawAss = new RedrawAssistant();
  104. //overlayItems = new List<Tuple<bool, HashSet<Point>>>();
  105. rightLineList = new List<Tuple<bool, InternalLine>>();
  106. canvasActive = false;
  107. UpdateUI();
  108. rightImageSize = new ImageDimension(0, 0);
  109. leftImageSize = new ImageDimension(0, 0);
  110. }
  111. /**************************/
  112. /*** INTERNAL FUNCTIONS ***/
  113. /**************************/
  114. /// <summary>
  115. /// Change the status of whether or not the lines are shown.
  116. /// </summary>
  117. /// <param name="lines">The HashSet containing the affected Line IDs.</param>
  118. /// <param name="shown">True if the lines should be shown, false if they should be hidden.</param>
  119. private void ChangeLines(HashSet<int> lines, bool shown)
  120. {
  121. foreach (int lineId in lines)
  122. {
  123. if (lineId <= rightLineList.Count - 1 && lineId >= 0)
  124. {
  125. rightLineList[lineId] = new Tuple<bool, InternalLine>(shown, rightLineList[lineId].Item2);
  126. }
  127. }
  128. }
  129. /// <summary>
  130. /// A function that populates the matrixes needed for deletion detection with line data.
  131. /// </summary>
  132. private void RepopulateDeletionMatrixes()
  133. {
  134. if (canvasActive)
  135. {
  136. isFilledMatrix = new bool[rightImageSize.Width, rightImageSize.Height];
  137. linesMatrix = new HashSet<int>[rightImageSize.Width, rightImageSize.Height];
  138. foreach (Tuple<bool, InternalLine> lineTuple in rightLineList)
  139. {
  140. if (lineTuple.Item1)
  141. {
  142. lineTuple.Item2.PopulateMatrixes(isFilledMatrix, linesMatrix);
  143. }
  144. }
  145. }
  146. }
  147. /// <summary>
  148. /// Tells the Presenter to Update the UI
  149. /// </summary>
  150. private void UpdateUI()
  151. {
  152. programPresenter.UpdateUIState(inDrawingMode, historyOfActions.CanUndo(), historyOfActions.CanRedo(), canvasActive, graphicLoaded);
  153. }
  154. /// <summary>
  155. /// A function that checks the deletion matrixes at a certain point
  156. /// and returns all Line ids at that point and in a square around it in a certain range.
  157. /// </summary>
  158. /// <param name="p">The point around which to check.</param>
  159. /// <param name="range">The range around the point. If range is 0, only the point is checked.</param>
  160. /// <returns>A List of all lines.</returns>
  161. private HashSet<int> CheckDeletionMatrixesAroundPoint(Point p, int range)
  162. {
  163. HashSet<int> returnSet = new HashSet<int>();
  164. foreach (Point pnt in GeometryCalculator.FilledCircleAlgorithm(p, (int)range))
  165. {
  166. if (pnt.X >= 0 && pnt.Y >= 0 && pnt.X < rightImageSize.Width && pnt.Y < rightImageSize.Height)
  167. {
  168. if (isFilledMatrix[(int)pnt.X, (int)pnt.Y])
  169. {
  170. returnSet.UnionWith(linesMatrix[(int)pnt.X, (int)pnt.Y]);
  171. }
  172. }
  173. }
  174. return returnSet;
  175. }
  176. /********************************************/
  177. /*** FUNCTIONS TO INTERACT WITH PRESENTER ***/
  178. /********************************************/
  179. /// <summary>
  180. /// A function to update the dimensions of the left and right canvas when the window is resized.
  181. /// </summary>
  182. /// <param name="LeftCanvas">The size of the left canvas.</param>
  183. /// <param name="RightCanvas">The size of the right canvas.</param>
  184. public void ResizeEvent(ImageDimension LeftCanvas, ImageDimension RightCanvas)
  185. {
  186. if(LeftCanvas.Height >= 0 && LeftCanvas.Width>= 0) { leftImageSize = LeftCanvas; }
  187. if(RightCanvas.Height >= 0 && RightCanvas.Width >= 0) { rightImageSize = RightCanvas; }
  188. RepopulateDeletionMatrixes();
  189. }
  190. /// <summary>
  191. /// A function to reset the right image.
  192. /// </summary>
  193. public void ResetRightImage()
  194. {
  195. rightLineList.Clear();
  196. programPresenter.PassLastActionTaken(historyOfActions.Reset());
  197. programPresenter.ClearRightLines();
  198. }
  199. /// <summary>
  200. /// The function to set the left image.
  201. /// </summary>
  202. /// <param name="width">The width of the left image.</param>
  203. /// <param name="height">The height of the left image.</param>
  204. /// <param name="listOfLines">The List of Lines to be displayed in the left image.</param>
  205. public void SetLeftLineList(int width, int height, List<InternalLine> listOfLines)
  206. {
  207. leftImageSize = new ImageDimension(width, height);
  208. rightImageSize = new ImageDimension(width, height);
  209. leftLineList = listOfLines;
  210. graphicLoaded = true;
  211. programPresenter.UpdateLeftLines(leftLineList);
  212. //programPresenter.ClearRightLines(); //TODO check if right position for this method call
  213. CanvasActivated();
  214. /*
  215. var workingCanvas = GetEmptyCanvas(width, height);
  216. var workingGraph = Graphics.FromImage(workingCanvas);
  217. leftLineList = listOfLines;
  218. //redrawAss = new RedrawAssistant(leftLineList);
  219. //overlayItems = redrawAss.Initialize(markerRadius);
  220. //Lines
  221. foreach (InternalLine line in leftLineList)
  222. {
  223. line.DrawLine(workingGraph);
  224. }
  225. leftImage = workingCanvas;
  226. programPresenter.UpdateLeftImage(leftImage);
  227. //Set right image to same size as left image and delete linelist
  228. DrawEmptyCanvasRight();
  229. rightLineList = new List<Tuple<bool, InternalLine>>();
  230. */
  231. }
  232. /// <summary>
  233. /// A function to tell the model a new canvas was activated.
  234. /// </summary>
  235. public void CanvasActivated()
  236. {
  237. canvasActive = true;
  238. RepopulateDeletionMatrixes();
  239. UpdateUI();
  240. }
  241. /// <summary>
  242. /// Will undo the last action taken, if the action history allows it.
  243. /// </summary>
  244. public void Undo()
  245. {
  246. if (historyOfActions.CanUndo())
  247. {
  248. HashSet<int> affectedLines = historyOfActions.GetCurrentAction().GetLineIDs();
  249. SketchAction.ActionType undoAction = historyOfActions.GetCurrentAction().GetActionType();
  250. switch (undoAction)
  251. {
  252. case SketchAction.ActionType.Delete:
  253. //Deleted Lines need to be shown
  254. ChangeLines(affectedLines, true);
  255. break;
  256. case SketchAction.ActionType.Draw:
  257. //Drawn lines need to be hidden
  258. ChangeLines(affectedLines, false);
  259. break;
  260. default:
  261. break;
  262. }
  263. //TODO: For the person implementing overlay: Add check if overlay needs to be added
  264. programPresenter.UpdateRightLines(rightLineList);
  265. }
  266. RepopulateDeletionMatrixes();
  267. programPresenter.PassLastActionTaken(historyOfActions.MoveAction(true));
  268. UpdateUI();
  269. }
  270. /// <summary>
  271. /// Will redo the last action undone, if the action history allows it.
  272. /// </summary>
  273. public void Redo()
  274. {
  275. if (historyOfActions.CanRedo())
  276. {
  277. programPresenter.PassLastActionTaken(historyOfActions.MoveAction(false));
  278. HashSet<int> affectedLines = historyOfActions.GetCurrentAction().GetLineIDs();
  279. SketchAction.ActionType redoAction = historyOfActions.GetCurrentAction().GetActionType();
  280. switch (redoAction)
  281. {
  282. case SketchAction.ActionType.Delete:
  283. //Deleted Lines need to be redeleted
  284. ChangeLines(affectedLines, false);
  285. break;
  286. case SketchAction.ActionType.Draw:
  287. //Drawn lines need to be redrawn
  288. ChangeLines(affectedLines, true);
  289. break;
  290. default:
  291. break;
  292. }
  293. //TODO: For the person implementing overlay: Add check if overlay needs to be added
  294. programPresenter.UpdateRightLines(rightLineList);
  295. RepopulateDeletionMatrixes();
  296. }
  297. UpdateUI();
  298. }
  299. /// <summary>
  300. /// The function called by the Presenter to change the drawing state of the program.
  301. /// </summary>
  302. /// <param name="nowDrawing">The new drawingstate of the program</param>
  303. public void ChangeState(bool nowDrawing)
  304. {
  305. inDrawingMode = nowDrawing;
  306. UpdateUI();
  307. }
  308. /// <summary>
  309. /// Updates the current cursor position of the model.
  310. /// </summary>
  311. /// <param name="p">The new cursor position</param>
  312. public void SetCurrentCursorPosition(Point p)
  313. {
  314. currentCursorPosition = p;
  315. mouseDown = programPresenter.IsMousePressed();
  316. }
  317. /// <summary>
  318. /// Start a new Line, when the Mouse is pressed down.
  319. /// </summary>
  320. public void MouseDown()
  321. {
  322. mouseDown = true;
  323. if (inDrawingMode && mouseDown)
  324. {
  325. currentLine.Clear();
  326. currentLine.Add(currentCursorPosition);
  327. }
  328. }
  329. /// <summary>
  330. /// Finish the current Line, when the pressed Mouse is released.
  331. /// </summary>
  332. /// <param name="valid">Whether the up event is valid or not</param>
  333. public void MouseUp(bool valid)
  334. {
  335. mouseDown = false;
  336. if (valid)
  337. {
  338. if (inDrawingMode && currentLine.Count > 0)
  339. {
  340. InternalLine newLine = new InternalLine(currentLine, rightLineList.Count);
  341. rightLineList.Add(new Tuple<bool, InternalLine>(true, newLine));
  342. newLine.PopulateMatrixes(isFilledMatrix, linesMatrix);
  343. programPresenter.PassLastActionTaken(historyOfActions.AddNewAction(new SketchAction(SketchAction.ActionType.Draw, newLine.GetID())));
  344. //TODO: For the person implementing overlay: Add check if overlay needs to be added
  345. programPresenter.UpdateRightLines(rightLineList);
  346. currentLine.Clear();
  347. //programPresenter.UpdateCurrentLine(currentLine)
  348. }
  349. }
  350. else
  351. {
  352. currentLine.Clear();
  353. }
  354. UpdateUI();
  355. }
  356. /// <summary>
  357. /// Method to be called every tick. Updates the current Line, or checks for Lines to delete, depending on the drawing mode.
  358. /// </summary>
  359. public void Tick()
  360. {
  361. if (cursorPositions.Count > 0) { previousCursorPosition = cursorPositions.Dequeue(); }
  362. else { previousCursorPosition = currentCursorPosition; }
  363. cursorPositions.Enqueue(currentCursorPosition);
  364. //Drawing
  365. if (inDrawingMode && programPresenter.IsMousePressed())
  366. {
  367. currentLine.Add(currentCursorPosition);
  368. //programPresenter.UpdateCurrentLine(currentLine);
  369. }
  370. //Deleting
  371. if (!inDrawingMode && programPresenter.IsMousePressed())
  372. {
  373. List<Point> uncheckedPoints = GeometryCalculator.BresenhamLineAlgorithm(previousCursorPosition, currentCursorPosition);
  374. foreach (Point currPoint in uncheckedPoints)
  375. {
  376. HashSet<int> linesToDelete = CheckDeletionMatrixesAroundPoint(currPoint, deletionRadius);
  377. if (linesToDelete.Count > 0)
  378. {
  379. programPresenter.PassLastActionTaken(historyOfActions.AddNewAction(new SketchAction(SketchAction.ActionType.Delete, linesToDelete)));
  380. foreach (int lineID in linesToDelete)
  381. {
  382. rightLineList[lineID] = new Tuple<bool, InternalLine>(false, rightLineList[lineID].Item2);
  383. }
  384. RepopulateDeletionMatrixes();
  385. //TODO: For the person implementing overlay: Add check if overlay needs to be added
  386. programPresenter.UpdateRightLines(rightLineList);
  387. }
  388. }
  389. }
  390. }
  391. /*
  392. /// <summary>
  393. /// A helper Function that updates the markerRadius & deletionRadius, considering the size of the canvas.
  394. /// </summary>
  395. /// <param name="CanvasSize">The size of the canvas</param>
  396. public void UpdateSizes(ImageDimension CanvasSize)
  397. {
  398. if (rightImageWithoutOverlay != null)
  399. {
  400. int widthImage = rightImageSize.Width;
  401. int heightImage = rightImageSize.Height;
  402. int widthBox = CanvasSize.Width;
  403. int heightBox = CanvasSize.Height;
  404. float imageRatio = (float)widthImage / (float)heightImage;
  405. float containerRatio = (float)widthBox / (float)heightBox;
  406. float zoomFactor = 0;
  407. if (imageRatio >= containerRatio)
  408. {
  409. //Image is wider than it is high
  410. zoomFactor = (float)widthImage / (float)widthBox;
  411. }
  412. else
  413. {
  414. //Image is higher than it is wide
  415. zoomFactor = (float)heightImage / (float)heightBox;
  416. }
  417. markerRadius = (int)(10 * zoomFactor);
  418. deletionRadius = (int)(5 * zoomFactor);
  419. }
  420. }
  421. */
  422. /// <summary>
  423. /// If there is unsaved progress.
  424. /// </summary>
  425. /// <returns>True if there is progress that has not been saved.</returns>
  426. public bool HasUnsavedProgress()
  427. {
  428. return !historyOfActions.IsEmpty();
  429. }
  430. }
  431. }