Help guys,
I am trying to make a paint program similar to Paint.net.
the problem im having is like i paint on the picturebox but when i click the minimize button and maximize it, the lines i drew disappear. here is my code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Drawing2D;
using System.Runtime.InteropServices;
namespace FireFrame
{
public partial class Form1 : Form
{
class hwndAPI
{
[DllImport("user32")]
public static extern IntPtr SetParent(IntPtr hWndChild, IntPtr hWndNewParent);
}
enum myTools
{
eLine, eFreeHand, eRectangle, eElipse,
eSlinky, eSelectionRectangle, eABC, eErarser, eBrush, eTextureBrush
};
myTools toolselect;
public struct Points
{
public int startX;
public int startY;
public int endX;
public int endY;
public Points(int startx, int starty, int endx, int endy)
{
startX = startx;
startY = starty;
endX = endx;
endY = endy;
}
}
int county = 0;
List<Points> points = new List<Points>();
public static Pen myPen = new Pen(Color.Black, 2);
int startX;
int startY;
int endX;
int endY;
bool down = false;
private Graphics graphObj;
private void paintCurrentPosition(Point loc, int thickness, Color colorPen)
{
/** this method is responsible for creating a single spot on the current position of the cursor.
* The cursor position as indicated
* by Cursor.Position is not accurately placed at the tip, so an offset is being employed to make sure that the spot appears at the tip of
* the cursor*/
SolidBrush brush = new SolidBrush(colorPen);
graphObj = pictureBox1.CreateGraphics();
graphObj.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
graphObj.DrawLine(new Pen(brush, thickness), _lastLoc, loc);
_lastLoc = loc;
}
private Bitmap buffer;
private Point _lastLoc;
public Form1()
{
InitializeComponent();
}
private void splitContainer3_Panel2_Resize(object sender, EventArgs e)
{
// Resize the buffer, if it is growing
if (buffer == null ||
buffer.Width < splitContainer3.Panel2.Width ||
buffer.Height < splitContainer3.Panel2.Height)
{
Bitmap newBuffer = new Bitmap(splitContainer3.Panel2.Width, splitContainer3.Panel2.Height);
if (buffer != null)
using (Graphics bufferGrph = Graphics.FromImage(newBuffer))
bufferGrph.DrawImageUnscaled(buffer, Point.Empty);
buffer = newBuffer;
}
}
private void loadImageToolStripMenuItem_Click(object sender, EventArgs e)
{
try
{
OpenFileDialog o = new OpenFileDialog();
o.Title = "Open File";
if (o.ShowDialog() == DialogResult.OK)
{
pictureBox1.Image = new Bitmap(o.FileName);
pictureBox1.Enabled = true;
}
}
catch (Exception)
{
throw new ApplicationException("Failed loading image");
}
}
private void clearImageToolStripMenuItem_Click(object sender, EventArgs e)
{
pictureBox1.Image = null;
}
private void exitToolStripMenuItem_Click(object sender, EventArgs e)
{
this.Dispose();
}
private void menuStrip1_ItemClicked(object sender, ToolStripItemClickedEventArgs e)
{
}
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
_lastLoc = e.Location;
startX = e.X;
startY = e.Y;
down = true;
}
private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
{
down = false;
}
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
Graphics g = pictureBox1.CreateGraphics();
if (down == true)
{
switch (toolselect)
{
case myTools.eFreeHand:
paintCurrentPosition(e.Location, 2, Color.Black);
break;
case myTools.eLine:
g.DrawLine(myPen, startX, startY, endX, endY);
endX = e.X;
endY = e.Y;
break;
}
}
}
private void Form1_Load(object sender, EventArgs e)
{
pictureBox1.Invalidate();
// imageList1.ColorDepth = System.Windows.Forms.ColorDepth.Depth32Bit;
// pictureBox1.Image = imageList1.Images[county];
}
private void button1_Click_1(object sender, EventArgs e)
{
toolselect = myTools.eFreeHand;
// county += 1;
// if (county + 1 >imageList1.Images.Count)
// {
// county = 0;
// }
// pictureBox1.Image = imageList1.Images[county];
//imageList1.ImageSize = new System.Drawing.Size(256, 256);
//imageList1.Images.Add(pictureBox1.Image);
//for (int j = 0; j < this.imageList1.Images.Count; j++)
//{
// ListViewItem item = new ListViewItem();
//item.ImageIndex = j;
//this.listView1.Items.Add(item);
//}
}
private void listView1_SelectedIndexChanged(object sender, EventArgs e)
{
}
private void listView1_DrawItem(object sender, DrawListViewItemEventArgs e)
{
Point p = new Point(10,10);
}
}
}Also i need help with the resize of the picture box like in paint.net because if i draw on the picturebox then resize the form the picture box removes the draw objects.
eg. i draw a line diagonally from the top left to bottom right, if i resize form (assuming i have picture box docked as fill) to about half the size diagonally, then half of the dianal line i drew would be gone, even if i try restoring the window to the previous size.
thank you
hope you can help me
