Creatig ellipse on a picturebox and making ellipse a link

[leprogrammer]

Hey im back with a new questions / problems

Question 1:
I have a image that is in a picturebox which is called pictureBox1

I want to read monstersetbase.txt and add small ellipses to my image. The position of the ellipse comes from my monstersetbase.txt. The image is 256x256 and the coordinates is example 125x150.

I figured out a way to write a ellipse on the picturebox. It looks like this:

		public void pictureBox1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
		{
			System.Drawing.Graphics g = e.Graphics;
			g.DrawEllipse(System.Drawing.Pens.Red, 125, 150, 2, 2);
		}

And on my form load:

		public void Form1_Load(object sender, EventArgs e)
		{
			pictureBox1.Paint += new PaintEventHandler(this.pictureBox1_Paint);
			this.Controls.Add(pictureBox1);
		}

Now my problem is that I cant seem to figure out how to read the txt file properly when I need all the data

If I use for example:

public void pictureBox1_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
		{
			String line;
			String data;

			System.Drawing.Graphics g = e.Graphics;

			// Reading txt file from fileLocation
			using (StreamReader sr = new StreamReader(Convert.ToString(@fileLocation)))
			{
				while ((line = sr.ReadLine()) != null)
				{
					// Converting line to string from txt file
					data = Convert.ToString(line);

					// Splitting data into piecesMap[]
					String[] piecesMap = data.Split('\t');

					// Converting x/y cord to float from string
					float xCord = float.Parse(piecesMap[3]);
					float yCord = float.Parse(piecesMap[4]);

					// Displaying ellipse
					g.DrawEllipse(System.Drawing.Pens.Red, xCord, yCord, 2, 2);
				}
			}

		}

then im getting the error:
Index was outside the bounds of the array.

Any suggestions?

My monstersetbase.txt:

3
0	0	30	78	60	240	240	-1	5	// Red Dragon
1	0	30	185	132	185	132	-1	10	  // Golden Titan
2	0	30	183	128	188	135	-1	10	  // Golden Solider
3	0	30	10	10	240	240	-1	12	  // Golden Goblin
4	0	30	10	10	240	240	-1	8 	// Golden Dragon
5	0	30	185	132	185	132	-1	7 	// Golden Lizard King
6	0	30	132	83	132	83	-1	10	  // Golden Vepar
7	0	30	183	128	188	135	-1	6 	// Golden Tantalos
8	0	30	132	83	138	90	-1	10	  // Golden Wheel
end
1
9	33	10	85	162	95	168	-1	5	// Kundun Demon
10	29	30	40	113	45	116	-1	3	// Kundum Demon
11	41	5	126	160	125	161	-1	2	// Kundum Demon
12	38	5	106	161	111	160	-1	2	// Kundum Demon
end

78 and 60 is the x and y coordinates in the text above.

Question 2:
After I insert the ellipse I want it to be "link" like when I click on it something happens
I also want to display a tooltil when I have the mouse over my ellipse is that possible?

 

[captainPlus]

Hello,

The rows which has less than 4 tabs will throw exception. Because the array will not have items at 3rd 4th indexes. For example first row. When you split this row from \t, you'll get an array with a single element. And when you want to access the 3rd index, you'll get error. I suggest simply adding a length control of array before trying to access to 3rd or 4th position in it.

For your second question, it's possible but not directly. You should follow the mouse coordinates in mousemove event, and calculate whether mouse's coordinates matches with one of your ellipses or not. If yes then you should change the cursor into hand, and on click event of picture box, do what you want. For tooltip issue, you can do it using the same logic and by using tooltip control available in VS toolbox.

Hope this helps,
Best
Ali

 

[leprogrammer]

Thank you for the answear(s)

Now I got it writing on the picturebox and when clicking on ellipse it shows a messagebox

But it only works for the last ellipse because the variable gp changes <.<

Any idea?

Here is the code:

public void readFileToPaint()

{

string line;

string data;

string fileLocation = @"D:\msbEditor\monstersetbase.txt";

using (StreamReader sr = new StreamReader(Convert.ToString(@fileLocation)))

{

while ((line = sr.ReadLine()) != null)

{

// Get rid of any trailing spaces

line = line.TrimEnd();

// if line is blank skip to next line

if (line == "") continue;

data = line; // don't need a conversion here as line is a string

// Splitting data into piecesMap[]

String[] piecesMap = data.Split('\t');

// if piecesMap only contains one element, skip to next line

if (piecesMap.Length == 1) continue;

Rectangle rect = new Rectangle(Convert.ToInt16(piecesMap[3]), Convert.ToInt16(piecesMap[4]), 4, 4);

gp.AddEllipse(rect);

}

}

}

public void pictureBox1_Paint(object sender, PaintEventArgs e)

{

Graphics g = e.Graphics;

g.DrawPath(new Pen(Color.Red), gp);

}

private void Form1_Load(object sender, EventArgs e)

{

readFileToPaint();

pictureBox1.Paint += new PaintEventHandler(this.pictureBox1_Paint);

this.Controls.Add(pictureBox1);

}

private void pictureBox1_MouseDown(object sender, MouseEventArgs e)

{

if (gp.IsVisible(e.X, e.Y))

{

MessageBox.Show("");

}

}