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- using System;
- using System.Collections.Generic;
- using System.Linq;
- using System.Text;
- using System.Threading.Tasks;
- using System.Drawing;
- namespace SketchAssistant
- {
- public class MVP_Model
- {
- /// <summary>
- /// The Presenter of the MVP-Model.
- /// </summary>
- MVP_Presenter programPresenter;
- /// <summary>
- /// History of Actions
- /// </summary>
- ActionHistory historyOfActions;
- /// <summary>
- /// The assistant responsible for the redraw mode
- /// </summary>
- RedrawAssistant redrawAss;
- /*******************/
- /*** ENUMERATORS ***/
- /*******************/
- /***********************/
- /*** CLASS VARIABLES ***/
- /***********************/
- bool inDrawingMode;
- bool mousePressed;
- /// <summary>
- /// Size of deletion area
- /// </summary>
- int deletionRadius = 5;
- /// <summary>
- /// Size of areas marking endpoints of lines in the redraw mode.
- /// </summary>
- int markerRadius = 10;
- /// <summary>
- /// The Position of the Cursor in the right picture box
- /// </summary>
- Point currentCursorPosition;
- /// <summary>
- /// The Previous Cursor Position in the right picture box
- /// </summary>
- Point previousCursorPosition;
- /// <summary>
- /// Queue for the cursorPositions
- /// </summary>
- Queue<Point> cursorPositions = new Queue<Point>();
- /// <summary>
- /// Lookup Matrix for checking postions of lines in the image
- /// </summary>
- bool[,] isFilledMatrix;
- /// <summary>
- /// Lookup Matrix for getting line ids at a certain postions of the image
- /// </summary>
- HashSet<int>[,] linesMatrix;
- /// <summary>
- /// List of items which will be overlayed over the right canvas.
- /// </summary>
- List<Tuple<bool, HashSet<Point>>> overlayItems;
- /// <summary>
- /// Width of the LeftImageBox.
- /// </summary>
- public int leftImageBoxWidth;
- /// <summary>
- /// Height of the LeftImageBox.
- /// </summary>
- public int leftImageBoxHeight;
- /// <summary>
- /// Width of the RightImageBox.
- /// </summary>
- public int rightImageBoxWidth;
- /// <summary>
- /// Height of the RightImageBox.
- /// </summary>
- public int rightImageBoxHeight;
- //Images
- Image leftImage;
- List<Line> leftLineList;
- Image rightImageWithoutOverlay;
- Image rightImageWithOverlay;
- List<Tuple<bool, Line>> rightLineList;
- List<Point> currentLine;
- public MVP_Model(MVP_Presenter presenter)
- {
- programPresenter = presenter;
- historyOfActions = new ActionHistory(null);
- redrawAss = new RedrawAssistant();
- }
-
- public void Undo()
- {
- }
- /// <summary>
- /// A function that returns a white canvas for a given width and height.
- /// </summary>
- /// <param name="width">The width of the canvas in pixels</param>
- /// <param name="height">The height of the canvas in pixels</param>
- /// <returns>The new canvas</returns>
- private Image GetEmptyCanvas(int width, int height)
- {
- Image image;
- try
- {
- image = new Bitmap(width, height);
- }
- catch (ArgumentException e)
- {
- programPresenter.PassMessageToView("The requested canvas size caused an error: \n"
- + e.ToString() + "\n The Canvas will be set to match your window.");
- image = new Bitmap(leftImageBoxWidth, leftImageBoxHeight);
- }
- Graphics graph = Graphics.FromImage(image);
- graph.FillRectangle(Brushes.White, 0, 0, width + 10, height + 10);
- return image;
- }
-
- /// <summary>
- /// Creates an empty Canvas
- /// </summary>
- private void DrawEmptyCanvasRight()
- {
- if (leftImage == null)
- {
- rightImageWithoutOverlay = GetEmptyCanvas(leftImageBoxWidth, leftImageBoxHeight);
- }
- else
- {
- rightImageWithoutOverlay = GetEmptyCanvas(leftImage.Width, leftImage.Height);
- }
- RefreshRightImage();
- }
- /// <summary>
- /// Creates an empty Canvas on the left
- /// </summary>
- /// <param name="width"> width of the new canvas in pixels </param>
- /// <param name="height"> height of the new canvas in pixels </param>
- private void DrawEmptyCanvasLeft(int width, int height)
- {
- if (width == 0)
- {
- leftImage = GetEmptyCanvas(leftImageBoxWidth, leftImageBoxHeight);
- }
- else
- {
- leftImage = GetEmptyCanvas(width, height);
- }
- RefreshLeftImage();
- }
- /// <summary>
- /// A function to refresh the image being displayed in the right picture box, with the current rightImageWithOverlay.
- /// </summary>
- /// <param name="image">The new Image</param>
- private void RefreshRightImage()
- {
- programPresenter.UpdateRightImage(rightImageWithOverlay);
- }
- /// <summary>
- /// A function to refresh the image being displayed in the left picture box, with the current leftImage.
- /// </summary>
- /// <param name="image">The new Image</param>
- private void RefreshLeftImage()
- {
- programPresenter.UpdateLeftImage(leftImage);
- }
- /// <summary>
- /// Redraws all lines in lineList, for which their associated boolean value equals true and calls RedrawRightOverlay.
- /// </summary>
- private void RedrawRightImage()
- {
- var workingCanvas = GetEmptyCanvas(rightImageWithoutOverlay.Width, rightImageWithoutOverlay.Height);
- var workingGraph = Graphics.FromImage(workingCanvas);
- //Lines
- foreach (Tuple<bool, Line> lineBoolTuple in rightLineList)
- {
- if (lineBoolTuple.Item1)
- {
- lineBoolTuple.Item2.DrawLine(workingGraph);
- }
- }
- //The Line being currently drawn
- if (currentLine != null && currentLine.Count > 0 && inDrawingMode && mousePressed)
- {
- var currLine = new Line(currentLine);
- currLine.DrawLine(workingGraph);
- }
- rightImageWithoutOverlay = workingCanvas;
- //Redraw the Overlay
- RedrawRightOverlay();
- RefreshRightImage();
- }
- /// <summary>
- /// Redraws all elements in the overlay items for which the respective boolean value is true.
- /// </summary>
- private void RedrawRightOverlay()
- {
- var workingCanvas = rightImageWithoutOverlay;
- var workingGraph = Graphics.FromImage(workingCanvas);
- foreach (Tuple<bool, HashSet<Point>> tup in overlayItems)
- {
- if (tup.Item1)
- {
- foreach (Point p in tup.Item2)
- {
- workingGraph.FillRectangle(Brushes.Green, p.X, p.Y, 1, 1);
- }
- }
- }
- rightImageWithOverlay = workingCanvas;
- RefreshRightImage();
- }
-
- /// <summary>
- /// The function called by the Presenter to change the drawing state of the program.
- /// </summary>
- /// <param name="nowDrawing">The new drawingstate of the program</param>
- public void ChangeState(bool nowDrawing)
- {
- inDrawingMode = nowDrawing;
- UpdateUI();
- }
-
- /// <summary>
- /// Change the status of whether or not the lines are shown.
- /// </summary>
- /// <param name="lines">The HashSet containing the affected Line IDs.</param>
- /// <param name="shown">True if the lines should be shown, false if they should be hidden.</param>
- private void ChangeLines(HashSet<int> lines, bool shown)
- {
- var changed = false;
- foreach (int lineId in lines)
- {
- if (lineId <= rightLineList.Count - 1 && lineId >= 0)
- {
- rightLineList[lineId] = new Tuple<bool, Line>(shown, rightLineList[lineId].Item2);
- changed = true;
- }
- }
- if (changed) { RedrawRightImage(); }
- }
-
- /// <summary>
- /// A function that populates the matrixes needed for deletion detection with line data.
- /// </summary>
- private void RepopulateDeletionMatrixes()
- {
- if (rightImageWithoutOverlay != null)
- {
- isFilledMatrix = new bool[rightImageWithoutOverlay.Width, rightImageWithoutOverlay.Height];
- linesMatrix = new HashSet<int>[rightImageWithoutOverlay.Width, rightImageWithoutOverlay.Height];
- foreach (Tuple<bool, Line> lineTuple in rightLineList)
- {
- if (lineTuple.Item1)
- {
- lineTuple.Item2.PopulateMatrixes(isFilledMatrix, linesMatrix);
- }
- }
- }
- }
- /*
- /// <summary>
- /// A function that checks the deletion matrixes at a certain point
- /// and returns all Line ids at that point and in a square around it in a certain range.
- /// </summary>
- /// <param name="p">The point around which to check.</param>
- /// <param name="range">The range around the point. If range is 0, only the point is checked.</param>
- /// <returns>A List of all lines.</returns>
- private HashSet<int> CheckDeletionMatrixesAroundPoint(Point p, int range)
- {
- HashSet<int> returnSet = new HashSet<int>();
- foreach (Point pnt in GeometryCalculator.FilledCircleAlgorithm(p, (int)range))
- {
- if (pnt.X >= 0 && pnt.Y >= 0 && pnt.X < rightImage.Width && pnt.Y < rightImage.Height)
- {
- if (isFilledMatrix[pnt.X, pnt.Y])
- {
- returnSet.UnionWith(linesMatrix[pnt.X, pnt.Y]);
- }
- }
- }
- return returnSet;
- }
- /// <summary>
- /// binds the given picture to templatePicture and draws it
- /// </summary>
- /// <param name="newTemplatePicture"> the new template picture, represented as a list of polylines </param>
- /// <returns></returns>
- private void BindAndDrawLeftImage(List<Line> newTemplatePicture)
- {
- leftLineList = newTemplatePicture;
- foreach (Line l in leftLineList)
- {
- l.DrawLine(Graphics.FromImage(leftImage));
- }
- }
-
- /// <summary>
- /// Will calculate the start and endpoints of the given line on the right canvas.
- /// </summary>
- /// <param name="line">The line.</param>
- /// <param name="size">The size of the circle with which the endpoints of the line are marked.</param>
- private Tuple<HashSet<Point>, HashSet<Point>> CalculateStartAndEnd(Line line, int size)
- {
- var circle0 = GeometryCalculator.FilledCircleAlgorithm(line.GetStartPoint(), size);
- var circle1 = GeometryCalculator.FilledCircleAlgorithm(line.GetEndPoint(), size);
- var currentLineEndings = new Tuple<HashSet<Point>, HashSet<Point>>(circle0, circle1);
- return currentLineEndings;
- }
- */
- /// <summary>
- /// A helper Function that updates the markerRadius & deletionRadius, considering the size of the canvas.
- /// </summary>
- public void UpdateSizes()
- {
- if (rightImageWithoutOverlay != null)
- {
- int widthImage = rightImageWithoutOverlay.Width;
- int heightImage = rightImageWithoutOverlay.Height;
- int widthBox = rightImageBoxWidth;
- int heightBox = rightImageBoxHeight;
- float imageRatio = (float)widthImage / (float)heightImage;
- float containerRatio = (float)widthBox / (float)heightBox;
- float zoomFactor = 0;
- if (imageRatio >= containerRatio)
- {
- //Image is wider than it is high
- zoomFactor = (float)widthImage / (float)widthBox;
- }
- else
- {
- //Image is higher than it is wide
- zoomFactor = (float)heightImage / (float)heightBox;
- }
- markerRadius = (int)(10 * zoomFactor);
- redrawAss.SetMarkerRadius(markerRadius);
- deletionRadius = (int)(5 * zoomFactor);
- }
- }
- /// <summary>
- /// Tells the Presenter to Update the UI
- /// </summary>
- private void UpdateUI()
- {
- programPresenter.UpdateUIState(inDrawingMode, historyOfActions.CanUndo(), historyOfActions.CanRedo(), (rightImageWithoutOverlay != null));
- }
- /// <summary>
- /// A method to get the dimensions of the right image.
- /// </summary>
- /// <returns>A tuple containing the width and height of the right image.</returns>
- public Tuple<int, int> GetRightImageDimensions()
- {
- if(rightImageWithoutOverlay != null)
- {
- return new Tuple<int, int>(rightImageWithoutOverlay.Width, rightImageWithoutOverlay.Height);
- }
- else
- {
- return new Tuple<int, int>(0, 0);
- }
- }
- public void SetCurrentCursorPosition(Point p)
- {
- }
- /*
- /// <summary>
- /// Checks if there is unsaved progess, and warns the user. Returns True if it safe to continue.
- /// </summary>
- /// <returns>true if there is none, or the user wishes to continue without saving.
- /// false if there is progress, and the user doesn't wish to continue.</returns>
- private bool CheckSavedStatus()
- {
- if (!historyOfActions.IsEmpty())
- {
- return (MessageBox.Show("You have unsaved changes, do you wish to continue?",
- "Attention", MessageBoxButtons.YesNo, MessageBoxIcon.Warning) == DialogResult.Yes);
- }
- return true;
- }
- */
- }
- }
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