Changing Grid Size With a checkbox

[fawkman]

Hey Guys

I am coding a grid in c#. I have posted the code below. I get the grid to print, but I want to allow the user to change the Grid Size by using a checkbox. I have tried writing some code to achieve this but I am not having any success.

Could anyone help me and suggest what I need to add to the code to achieve what I am after. Or if there is a better way of doing it then I would be interested in knowing.

Here is the code that paints the grid.

private int SQsize = 25;
private int gridSize = 250;
/// <summary>
        /// Event fired on paint of the grid
        /// Draws the grid lines based on the selected sizes 
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void pictureBox1_Paint(object sender, PaintEventArgs e)
        {
            

            if (gridLines == 1)
            {
                Graphics grid = e.Graphics;
                Pen myPen = new Pen(Color.Black, 1); //create a pen object
                for (int a = 0; a <= this.gridSize; a += this.SQsize)
                {
                    grid.DrawLine(myPen, 0, a, gridSize, a); //use the DrawLine Horizontal
                    grid.DrawLine(myPen, a, 0, a, gridSize); //use the DrawLine Vertical
                }
                myPen.Dispose();
            }

            Graphics paint = e.Graphics;
            SolidBrush myBrush = new SolidBrush(colorDialog1.Color);

            if (gridSize == 500 && SQsize == 10)
            {
                this.maxCol = 50;
                this.maxRow = 50;
                toolStripStatusLabel1.Text = "Grid Size: Large 50x50";
            }
            if (gridSize == 500 && SQsize == 25)
            {
                this.maxCol = 20;
                this.maxRow = 20;
                toolStripStatusLabel1.Text = "Grid Size: Large 20x20";
            }
            if (gridSize == 500 && SQsize == 50)
            {
                this.maxCol = 10;
                this.maxRow = 10;
                toolStripStatusLabel1.Text = "Grid Size: Large 10x10";
            }
            if (gridSize == 250 && SQsize == 10)
            {
                this.maxCol = 25;
                this.maxRow = 25;
                toolStripStatusLabel1.Text = "Grid Size: Medium 25x25";
            }
            if (gridSize == 250 && SQsize == 25)
            {
                this.maxCol = 10;
                this.maxRow = 10;
                toolStripStatusLabel1.Text = "Grid Size: Medium 10x10";
            }
            if (gridSize == 250 && SQsize == 50)
            {
                this.maxCol = 5;
                this.maxRow = 5;
                toolStripStatusLabel1.Text = "Grid Size: Medium 5x5";
            }
            if (gridSize == 200 && SQsize == 10)
            {
                this.maxCol = 20;
                this.maxRow = 20;
                toolStripStatusLabel1.Text = "Grid Size: Small 20x20";
            }
            if (gridSize == 200 && SQsize == 25)
            {
                this.maxCol = 8;
                this.maxRow = 8;
                toolStripStatusLabel1.Text = "Grid Size: Small 8x8";
            }
            if (gridSize == 200 && SQsize == 50)
            {
                this.maxCol = 4;
                this.maxRow = 4;
                toolStripStatusLabel1.Text = "Grid Size: Small 4x4";
            }
            int cellRow = 0;

            // iterates over each row in teh array...
            while (cellRow < maxRow)
            {
                int cellCol = 0;
                /// each column in the row
                while (cellCol < maxCol)
                {
                    //  if the array has a value of '1' in this position then it needs to be painted (the value is set to '1' when
                    //  the user clicks on it - handled my the MouseDown event below)
                    if (shape == 1)
                    {
                        if (paintSQ[cellCol, cellRow] == 1)
                        {

                            paint.FillRectangle(myBrush, (cellCol * this.SQsize) + 1, (cellRow * this.SQsize) + 1, this.SQsize - 1, this.SQsize - 1);
                        }
                    }
                    if (shape == 0)
                    {
                        if (paintSQ[cellCol, cellRow] == 1)
                        {
                            paint.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
                            paint.FillEllipse(myBrush, new Rectangle((cellCol * this.SQsize), (cellRow * this.SQsize), this.SQsize, this.SQsize));
                        }
                    }
                    cellCol++;
                }
                cellRow++;
            }
            myBrush.Dispose();

        }

Here is the code I want to use to change the size of the grid when the check box is selected. It builds and runs, and when i select the checkbox the label displays Grid Size: Large 50x50. But the grid itself doesnt change. I know I need to add some more code to do this, but i have had a play around and can't get it to work. My lack of understanding isn't helping me much.

//I want to use a check box to resize the grid, each checkbo will represent a static grid size
        private void checkBox1_CheckedChanged(object sender, EventArgs e)
        {
            //here i have set the variables for gridSize and SQsize.  This would paint a grid size 50x50
            //I need to add more code to call the grid paint function
             int gridSize = 500;
             int SQsize = 10;

            if (gridSize == 500 && SQsize == 10)
            {
                this.maxCol = 50;
                this.maxRow = 50;
                toolStripStatusLabel1.Text = "Grid Size: Large 50x50";
            }

        }

Thanks to anyone who takes the time to read this and give me help with feedback. I really appreciate the help.

regards