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- using System;
- using System.Collections.Generic;
- using System.ComponentModel;
- using System.Data;
- using System.Drawing;
- using System.Drawing.Imaging;
- using System.Linq;
- using System.Text;
- using System.Threading.Tasks;
- using System.Windows.Forms;
- using System.IO;
- // This is the code for your desktop app.
- // Press Ctrl+F5 (or go to Debug > Start Without Debugging) to run your app.
- namespace SketchAssistant
- {
- public partial class Form1 : Form
- {
- public Form1()
- {
- InitializeComponent();
- }
- /**********************************/
- /*** CLASS VARIABLES START HERE ***/
- /**********************************/
- //Different Program States
- public enum ProgramState
- {
- Idle,
- Draw,
- Delete
- }
- //Current Program State
- private ProgramState currentState;
- //Dialog to select a file.
- OpenFileDialog openFileDialogLeft = new OpenFileDialog();
- //Image loaded on the left
- Image leftImage = null;
- //Image on the right
- Image rightImage = null;
- //Current Line being Drawn
- List<Point> currentLine;
- //All Lines in the current session
- List<Tuple<bool,Line>> lineList = new List<Tuple<bool, Line>>();
- //Whether the Mouse is currently pressed in the rightPictureBox
- bool mousePressed = false;
- //The Position of the Cursor in the right picture box
- Point currentCursorPosition;
- //The Previous Cursor Position in the right picture box
- Point previousCursorPosition;
- //Queue for the cursorPositions
- Queue<Point> cursorPositions = new Queue<Point>();
- //The graphic representation of the right image
- Graphics graph = null;
- //Deletion Matrixes for checking postions of lines in the image
- bool[,] isFilledMatrix;
- HashSet<int>[,] linesMatrix;
- //Size of deletion area
- uint deletionSize = 2;
- //Dialog to save a file
- SaveFileDialog saveFileDialogRight = new SaveFileDialog();
- /******************************************/
- /*** FORM SPECIFIC FUNCTIONS START HERE ***/
- /******************************************/
- private void Form1_Load(object sender, EventArgs e)
- {
- currentState = ProgramState.Idle;
- this.DoubleBuffered = true;
- }
- //Resize Function connected to the form resize event, will refresh the form when it is resized
- private void Form1_Resize(object sender, System.EventArgs e)
- {
- this.Refresh();
- }
-
- //Load button, will open an OpenFileDialog
- private void loadToolStripMenuItem_Click(object sender, EventArgs e)
- {
- openFileDialogLeft.Filter = "Image (*.jpg, *.png, *.jpeg)|*.jpg;*.png;*.jpeg";
- if(openFileDialogLeft.ShowDialog() == DialogResult.OK)
- {
- toolStripLoadStatus.Text = openFileDialogLeft.SafeFileName;
- leftImage = Image.FromFile(openFileDialogLeft.FileName);
- pictureBoxLeft.Image = leftImage;
- //Refresh the left image box when the content is changed
- this.Refresh();
- }
- }
- //Save button, will open an SaveFileDialog
- private void saveToolStripMenuItem_Click(object sender, EventArgs e)
- {
- if (rightImage != null)
- {
- saveFileDialogRight.Filter = "Image|*.jpg;*.png;*.jpeg|" + "Vector Graphics (*svg|*.svg" + "All files (*.*)|*.*" ;
- ImageFormat format = ImageFormat.Jpeg;
- if (saveFileDialogRight.ShowDialog() == DialogResult.OK)
- {
- switch (saveFileDialogRight.Filter)
- {
- case ".svg":
- String returnString = createSvgTxt();
- File.WriteAllText(saveFileDialogRight.FileName, returnString);
- return;
- case ".png":
- format = ImageFormat.Png;
- break;
- case ".bmp":
- format = ImageFormat.Bmp;
- break;
- }
- pictureBoxRight.Image.Save(saveFileDialogRight.FileName, format);
- }
- }
- else
- {
- MessageBox.Show("The right picture box can't be empty");
- }
-
-
- }
- //Changes the state of the program to drawing
- private void drawButton_Click(object sender, EventArgs e)
- {
- if(rightImage != null)
- {
- if (currentState.Equals(ProgramState.Draw))
- {
- ChangeState(ProgramState.Idle);
- }
- else
- {
- ChangeState(ProgramState.Draw);
- }
- }
- }
- //Changes the state of the program to deletion
- private void deleteButton_Click(object sender, EventArgs e)
- {
- if (rightImage != null)
- {
- if (currentState.Equals(ProgramState.Delete))
- {
- ChangeState(ProgramState.Idle);
- }
- else
- {
- ChangeState(ProgramState.Delete);
- }
- }
- }
- //get current Mouse positon within the right picture box
- private void pictureBoxRight_MouseMove(object sender, MouseEventArgs e)
- {
- currentCursorPosition = ConvertCoordinates(new Point(e.X, e.Y));
- }
- //hold left mouse button to draw.
- private void pictureBoxRight_MouseDown(object sender, MouseEventArgs e)
- {
- mousePressed = true;
- if (currentState.Equals(ProgramState.Draw))
- {
- currentLine = new List<Point>();
- }
- }
- //when the picture box is clicked, add a point to the current line. Occurs f.ex. when using drawing tablets
- private void pictureBoxRight_Click(object sender, EventArgs e)
- {
- if (currentState.Equals(ProgramState.Draw))
- {
- List<Point> singlePoint = new List<Point> { currentCursorPosition };
- Line singlePointLine = new Line(singlePoint, lineList.Count);
- singlePointLine.PopulateMatrixes(isFilledMatrix, linesMatrix);
- singlePointLine.DrawLine(graph);
- pictureBoxRight.Image = rightImage;
- }
- }
- //Lift left mouse button to stop drawing and add a new Line.
- private void pictureBoxRight_MouseUp(object sender, MouseEventArgs e)
- {
- mousePressed = false;
- if (currentState.Equals(ProgramState.Draw) && currentLine.Count > 0)
- {
- Line newLine = new Line(currentLine, lineList.Count);
- lineList.Add(new Tuple<bool, Line>(true, newLine));
- newLine.PopulateMatrixes(isFilledMatrix, linesMatrix);
- }
- }
- //Button to create a new Canvas. Will create an empty image
- //which is the size of the left image, if there is one.
- //If there is no image loaded the canvas will be the size of the right picture box
- private void canvasButton_Click(object sender, EventArgs e)
- {
- DrawEmptyCanvas();
- //The following lines cannot be in DrawEmptyCanvas()
- isFilledMatrix = new bool[rightImage.Width, rightImage.Height];
- linesMatrix = new HashSet<int>[rightImage.Width, rightImage.Height];
- }
- //add a Point on every tick to the Drawpath
- private void mouseTimer_Tick(object sender, EventArgs e)
- {
- cursorPositions.Enqueue(currentCursorPosition);
- previousCursorPosition = cursorPositions.Dequeue();
- if (currentState.Equals(ProgramState.Draw) && mousePressed)
- {
- currentLine.Add(currentCursorPosition);
- Line drawline = new Line(currentLine);
- drawline.DrawLine(graph);
- pictureBoxRight.Image = rightImage;
- }
- if (currentState.Equals(ProgramState.Delete) && mousePressed)
- {
- List<Point> uncheckedPoints = Line.BresenhamLineAlgorithm(previousCursorPosition, currentCursorPosition);
- foreach (Point currPoint in uncheckedPoints)
- {
- HashSet<int> linesToDelete = CheckDeletionMatrixesAroundPoint(currPoint, deletionSize);
- if (linesToDelete.Count > 0)
- {
- foreach (int lineID in linesToDelete)
- {
- lineList[lineID] = new Tuple<bool, Line>(false, lineList[lineID].Item2);
- }
- RepopulateDeletionMatrixes();
- RedrawRightImage();
- }
- }
- }
- }
-
- /***********************************/
- /*** HELPER FUNCTIONS START HERE ***/
- /***********************************/
- /// <summary>
- /// Creates an empty Canvas
- /// </summary>
- private void DrawEmptyCanvas()
- {
- if (leftImage == null)
- {
- rightImage = new Bitmap(pictureBoxRight.Width, pictureBoxRight.Height);
- graph = Graphics.FromImage(rightImage);
- graph.FillRectangle(Brushes.White, 0, 0, pictureBoxRight.Width + 10, pictureBoxRight.Height + 10);
- pictureBoxRight.Image = rightImage;
- }
- else
- {
- rightImage = new Bitmap(leftImage.Width, leftImage.Height);
- graph = Graphics.FromImage(rightImage);
- graph.FillRectangle(Brushes.White, 0, 0, leftImage.Width + 10, leftImage.Height + 10);
- pictureBoxRight.Image = rightImage;
- }
- this.Refresh();
- pictureBoxRight.Refresh();
- }
- /// <summary>
- /// Redraws all lines in lineList, for which their associated boolean value equals true.
- /// </summary>
- private void RedrawRightImage()
- {
- DrawEmptyCanvas();
- foreach (Tuple<bool, Line> lineBoolTuple in lineList)
- {
- if (lineBoolTuple.Item1)
- {
- lineBoolTuple.Item2.DrawLine(graph);
- }
- }
- pictureBoxRight.Refresh();
- }
- /// <summary>
- /// A helper function which handles tasks associated witch changing states,
- /// such as checking and unchecking buttons and changing the state.
- /// </summary>
- /// <param name="newState">The new state of the program</param>
- private void ChangeState(ProgramState newState)
- {
- switch (currentState)
- {
- case ProgramState.Draw:
- drawButton.CheckState = CheckState.Unchecked;
- mouseTimer.Enabled = false;
- break;
- case ProgramState.Delete:
- deleteButton.CheckState = CheckState.Unchecked;
- mouseTimer.Enabled = false;
- break;
- default:
- break;
- }
- switch (newState)
- {
- case ProgramState.Draw:
- drawButton.CheckState = CheckState.Checked;
- mouseTimer.Enabled = true;
- break;
- case ProgramState.Delete:
- deleteButton.CheckState = CheckState.Checked;
- mouseTimer.Enabled = true;
- break;
- default:
- break;
- }
- currentState = newState;
- pictureBoxRight.Refresh();
- }
- /// <summary>
- /// A function that calculates the coordinates of a point on a zoomed in image.
- /// </summary>
- /// <param name="">The position of the mouse cursor</param>
- /// <returns>The real coordinates of the mouse cursor on the image</returns>
- private Point ConvertCoordinates(Point cursorPosition)
- {
- Point realCoordinates = new Point(5,3);
- if(pictureBoxRight.Image == null)
- {
- return cursorPosition;
- }
- int widthImage = pictureBoxRight.Image.Width;
- int heightImage = pictureBoxRight.Image.Height;
- int widthBox = pictureBoxRight.Width;
- int heightBox = pictureBoxRight.Height;
- float imageRatio = (float)widthImage / (float)heightImage;
- float containerRatio = (float)widthBox / (float)heightBox;
- if (imageRatio >= containerRatio)
- {
- //Image is wider than it is high
- float zoomFactor = (float)widthImage / (float)widthBox;
- float scaledHeight = heightImage / zoomFactor;
- float filler = (heightBox - scaledHeight) / 2;
- realCoordinates.X = (int)(cursorPosition.X * zoomFactor);
- realCoordinates.Y = (int)((cursorPosition.Y - filler) * zoomFactor);
- }
- else
- {
- //Image is higher than it is wide
- float zoomFactor = (float)heightImage / (float)heightBox;
- float scaledWidth = widthImage / zoomFactor;
- float filler = (widthBox - scaledWidth) / 2;
- realCoordinates.X = (int)((cursorPosition.X - filler) * zoomFactor);
- realCoordinates.Y = (int)(cursorPosition.Y * zoomFactor);
- }
- return realCoordinates;
- }
- /// <summary>
- /// A function that populates the matrixes needed for deletion detection with line data.
- /// </summary>
- private void RepopulateDeletionMatrixes()
- {
- if(rightImage != null)
- {
- isFilledMatrix = new bool[rightImage.Width,rightImage.Height];
- linesMatrix = new HashSet<int>[rightImage.Width, rightImage.Height];
- foreach(Tuple<bool,Line> lineTuple in lineList)
- {
- 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, uint range)
- {
- HashSet<int> returnSet = new HashSet<int>();
- if (p.X >= 0 && p.Y >= 0 && p.X < rightImage.Width && p.Y < rightImage.Height)
- {
- if (isFilledMatrix[p.X, p.Y])
- {
- returnSet.UnionWith(linesMatrix[p.X, p.Y]);
- }
- }
- for (int x_mod = (int)range*(-1); x_mod < range; x_mod++)
- {
- for (int y_mod = (int)range * (-1); y_mod < range; y_mod++)
- {
- if (p.X + x_mod >= 0 && p.Y + y_mod >= 0 && p.X + x_mod < rightImage.Width && p.Y + y_mod < rightImage.Height)
- {
- if (isFilledMatrix[p.X + x_mod, p.Y + y_mod])
- {
- returnSet.UnionWith(linesMatrix[p.X + x_mod, p.Y + y_mod]);
- }
- }
- }
- }
- return returnSet;
- }
- private String createSvgTxt()
- {
- String newString = String.Format(@"< svg viewBox = ""0 0 {0} {1}"" xmlns = ""http://www.w3.org/2000/svg"" >", rightImage.Width, rightImage.Height);
- foreach (Tuple<bool,Line> lineTuple in lineList)
- {
- if(lineTuple.Item1 == true)
- {
- String nextLine = String.Format("\n" + @"<line x1 = ""{0}"" y1 = ""{1}""2 x2 = ""{2}"" y2 = ""{3}"" stroke = ""black"" />\n",
- lineTuple.Item2.GetStartPoint().X, lineTuple.Item2.GetStartPoint().Y, lineTuple.Item2.GetEndPoint().X, lineTuple.Item2.GetEndPoint().X);
- newString += nextLine;
- }
- }
- return newString;
- }
- private void saveToolStripMenuItem1_Click(object sender, EventArgs e)
- {
- }
- }
- }
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