IndexOutOfRangeException from Series.CalcXPos

[anton dizhur]

I get the following runtime error with stack trace. My app is handling MouseEnter/Leave events for Bar and Line.

Any idea what is going on?

See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.IndexOutOfRangeException: Index was outside the bounds of the array.
at Steema.TeeChart.Styles.Series.CalcXPos(Int32 index)
at Steema.TeeChart.Styles.CustomPoint.CalcXPos(Int32 valueIndex)
at Steema.TeeChart.Styles.CustomPoint.Clicked(Int32 x, Int32 y)
at Steema.TeeChart.Styles.Custom.Clicked(Int32 x, Int32 y)
at Steema.TeeChart.Styles.Series.CheckMouse(Cursor& c, Int32 x, Int32 y)
at Steema.TeeChart.Chart.CheckMouseSeries(Cursor& c, Int32 X, Int32 Y)
at Steema.TeeChart.Chart.DoMouseMove(Int32 x, Int32 y, Cursor& c)
at Steema.TeeChart.TChart.OnMouseMove(MouseEventArgs e)
at System.Windows.Forms.Control.WmMouseMove(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

[Narcís]

Hi Anthon,

Could you please send us some code or an example we can run "as-is" to reproduce the problem here? You can post your files at [url]news://www.steema.net/steema.public.attachments[/url] newsgroup.

[anton dizhur]

This error happened randomly. Not sure how to reproduce it. I was hoping you can check the implementation to figure out some clue for me.

My app displays six charts. One of them has bar chart and the rest have just lines. We track the MoveEnter/Leave events to show a popup label with the tile of each line (or bar). This is the code segment:

For bar chart:
bar_SellSide.MouseEnter += new EventHandler(bar_MouseEnter);
bar_SellSide.MouseLeave += new EventHandler(bar_MouseLeave);

bar_BuySide.MouseEnter += new EventHandler(bar_MouseEnter);
bar_BuySide.MouseLeave += new EventHandler(bar_MouseLeave);

bar_Benchmark.MouseEnter += new EventHandler(bar_MouseEnter);
bar_Benchmark.MouseLeave += new EventHandler(bar_MouseLeave);

private void bar_MouseLeave(object sender, System.EventArgs e)
{
label1.Visible = false;
}

private void bar_MouseEnter(object sender, System.EventArgs e)
{
try
{
Point cursorLoc = Sector_Info.PointToClient(Cursor.Position);
int idx = ((Steema.TeeChart.Styles.Bar)sender).Clicked(cursorLoc);
string textInfo = ((Steema.TeeChart.Styles.Bar)sender).Labels[idx];

label1.Text = textInfo;
Graphics g = label1.CreateGraphics();
SizeF txtSize = g.MeasureString(textInfo, label1.Font);
label1.Size = new Size ((int)(txtSize.Width + 4), (int)(txtSize.Height + 4));
g.Dispose();

label1.Top = Sector_Info.Top + cursorLoc.Y - label1.Height;
label1.Left = Sector_Info.Left + cursorLoc.X - label1.Width / 2;

label1.BringToFront();
label1.Visible = true;
}
catch (Exception)
{
}
}


For line chart:

line_Beta.MouseEnter += new EventHandler(line_MouseEnter);
line_Beta.MouseLeave += new EventHandler(line_MouseLeave);

line_BuyBeta.MouseEnter += new EventHandler(line_MouseEnter);
line_BuyBeta.MouseLeave += new EventHandler(line_MouseLeave);

line_SellBeta.MouseEnter += new EventHandler(line_MouseEnter);
line_SellBeta.MouseLeave += new EventHandler(line_MouseLeave);

private void line_MouseLeave(object sender, System.EventArgs e)
{
label1.Visible = false;
}

private void line_MouseEnter(object sender, System.EventArgs e)
{
try
{
Point cursorLoc = Beta.PointToClient(Cursor.Position);
string textInfo = ((Steema.TeeChart.Styles.Line)sender).Title;

label1.Text = textInfo;
Graphics g = label1.CreateGraphics();
SizeF txtSize = g.MeasureString(textInfo, label1.Font);
label1.Size = new Size ((int)(txtSize.Width + 4), (int)(txtSize.Height + 4));
g.Dispose();

label1.Top = Beta.Top + cursorLoc.Y - label1.Height;
label1.Left = Beta.Left + cursorLoc.X - label1.Width / 2;

label1.BringToFront();
label1.Visible = true;
}
catch (Exception)
{
}
}


Thanks for the help.

[Christopher]

Hi,

Having looked at your code with the TeeChart source I think you'd be better off using the following:

Code: Select all

		private void tChart1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
		{
			Point cursorLoc;
			Steema.TeeChart.Styles.Series series;
			string textInfo = "";
			int idx = -1;
			cursorLoc = new Point(e.X, e.Y);

			for(int i = 0; i < tChart1.Series.Count; ++i) 
			{
				series = tChart1[i];
				idx = series.Clicked(cursorLoc); 
				if(idx != -1) 
				{

					if(series is Steema.TeeChart.Styles.Bar) 
						textInfo = ((Steema.TeeChart.Styles.Bar)series)[idx].Label;
					else if(series is Steema.TeeChart.Styles.Line)
						textInfo = ((Steema.TeeChart.Styles.Line)series).Title; 

					label1.Text = textInfo; 
					Graphics g = label1.CreateGraphics(); 
					SizeF txtSize = g.MeasureString(textInfo, label1.Font); 
					label1.Size = new Size ((int)(txtSize.Width + 4), (int)(txtSize.Height + 4)); 
					g.Dispose(); 

					label1.Top = this.Top + cursorLoc.Y - label1.Height; 
					label1.Left = this.Left + cursorLoc.X - label1.Width / 2; 

					label1.BringToFront(); 
					label1.Visible = true; 
				}
			}
		}

You might also consider using an Steema.TeeChart.Tools.Annotation instead of the System.Windows.Forms.Label.

[anton dizhur]

Hi,

Are you saying I have to switch to MouseMove event? When should I hide the label?

Thanks,

[Narcís]

Hi anton dizhur,

I don't have to switch, it's just a suggestion. You can hide the label when you want.