How to detect click dynamically drawing?

Question

I am drawing a list of file and folder names in the panel, and I am trying to brainstorm the best way to determine when and when the user clicks on a file / folder name, and also the file or folder name actually clicked.

Below are the methods that I have written so far. My first thought was to copy every piece of text using a transparent control and dynamically hook the onclick event this way. But this seems like a waste of resources.

private void DisplayFolderContents(ListBox lb, string sPath)
    {
        lblPath.Text = sPath;
        const float iPointX = 01.0f;
        float iPointY = 20.0f;
        DirectoryContents = FileSystem.RetrieveDirectoriesAndFiles(sPath, true, true, "*.mp3");

        foreach (string str in DirectoryContents)
        {
            DrawString(FileSystem.ReturnFolderFromPath(str), iPointX, iPointY, 21, panListing);


            iPointY += 50;
        }
    }


private void DrawString(string textToDraw, float xCoordinate, float yCoordinate, int fontSize, Control controlToDrawOn)
    {

        Graphics formGraphics = controlToDrawOn.CreateGraphics();
        formGraphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
        Font drawFont = new Font(
                "Arial", fontSize, FontStyle.Bold);

        SolidBrush drawBrush = new
                SolidBrush(Color.White);

        formGraphics.DrawString(textToDraw, drawFont, drawBrush, xCoordinate, yCoordinate);

        drawFont.Dispose();
        drawBrush.Dispose();
        formGraphics.Dispose();
    }

Thanks Kevin

Answer 1

First of all, save the list of each line or object drawn on the panel, with their location and size.

MouseDown MouseUp ( , )

List<YourObject> m_list; //The list of objects drawn in the panel.

private void OnMouseDown(object sender, MouseEventArgs e)
{
    foreach(YourObject obj in m_list)
    {
        if(obj.IsHit(e.X, e.Y))
        {
            //Do Something
        }
    }
}

YourObject IsHit:

public class YourObject
{

    public Point Location { get; set; }
    public Size Size {get; set; }

    public bool IsHit(int x, int y)
    {
        Rectangle rc = new Rectangle(this.Location, this.Size);
        return rc.Contains(x, y);
    }
}

, , . .

Answer 2

, . . Doh!