InteractiveSketchAssistant/SketchAssistant/SketchAssistant/Form1.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
//using SvgNet;

// 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();
        }

        //Dialog to select a file.
        OpenFileDialog openFileDialogLeft = new OpenFileDialog();
        //Image loaded on the left
        Image leftImage = null;
        //Image on the right
        Image rightImage = null;

        private void Form1_Load(object sender, EventArgs e)
        {
            this.DoubleBuffered = true;
            //Connect the Paint event of the left picture box to the event handler method.
            pictureBoxLeft.Paint += new System.Windows.Forms.PaintEventHandler(this.pictureBoxLeft_Paint);
            pictureBoxRight.Paint += new System.Windows.Forms.PaintEventHandler(this.pictureBoxRight_Paint);
        }

        private void pictureBoxLeft_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
        {
            //Draw the left image
            if(leftImage != null)
            {
                pictureBoxLeft.Image = leftImage;
            }

        }

        private void pictureBoxRight_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
        {
            //Draw the right image
            if (rightImage != null)
            {
                pictureBoxRight.Image = rightImage;
            }
        }

        // A Table Layout with one row and two columns. 
        // Columns are 50% so that the window is evenly split.
        // The size is manually set relative to the window size. 
        // TODO: Maybe change this to automatically be the size of a parent container...
        private void tableLayoutPanel1_Paint(object sender, PaintEventArgs e)
        {

        }

        private void fileToolStripMenuItem_Click(object sender, EventArgs e)
        {

        }
        
        //Load button, will open an OpenFileDialog
        private void loadToolStripMenuItem_Click(object sender, EventArgs e)
        {
            openFileDialogLeft.Filter = "Image|*.jpg;*.png;*.jpeg";
            if(openFileDialogLeft.ShowDialog() == DialogResult.OK)
            {
                toolStripLoadStatus.Text = openFileDialogLeft.SafeFileName;
                leftImage = Image.FromFile(openFileDialogLeft.FileName);
                //The following line is needed, as else on first image load
                //the image will only be shown after resizing the window.
                this.Refresh();
            }
        }

        private void toolStripStatusLabel1_Click(object sender, EventArgs e)
        {

        }

        private void statusStrip1_ItemClicked(object sender, ToolStripItemClickedEventArgs e)
        {

        }

        //Timer that refreshes the left picture box, so that it will always show the right contents in the right size
        private void timer1_Tick(object sender, EventArgs e)
        {
            this.Refresh();
            pictureBoxLeft.Refresh();
            pictureBoxRight.Refresh();
        }

        private void pictureBoxLeft_Click(object sender, EventArgs e)
        {

        }

        //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 toolStripButton1_Click(object sender, EventArgs e)
        {
            if (leftImage == null)
            {
                rightImage = new Bitmap(pictureBoxRight.Width, pictureBoxRight.Height);
                using (Graphics grp = Graphics.FromImage(rightImage))
                {
                    grp.FillRectangle(Brushes.White, 0, 0, pictureBoxRight.Width + 10, pictureBoxRight.Height + 10);
                }
            }
            else
            {
                rightImage = new Bitmap(leftImage.Width, leftImage.Height);
                using (Graphics grp = Graphics.FromImage(rightImage))
                {
                    grp.FillRectangle(Brushes.White, 0, 0, leftImage.Width + 10, leftImage.Height + 10);
                }
            }
            this.Refresh();
        }
    }
}