Axis GetPOstion() returns 0 and more

[yvb]

Hi,
I am using TeeChart pro V8.0.0.6 Version v Active x, C++.
The following code draws the chart, axis and series as expected.
The values of leftPos, bottomPos and topPos which use the axis GetPosition() function get 0 values. Why?
chartCenter, ChartWidth and canvasLeft get 0 value as well. Why?
Drawing line on the canvas with MoveTo() LineTo() using several different values of argumnets don't draw any line. Why?

Is there anything mising?
Please help me.
Thanks,
YVB

Code: Select all

	m_Chart.GetAspect().SetView3D(false);
	m_Chart.GetAxis().GetLeft().SetAutomatic(false);
	m_Chart.GetAxis().GetLeft().SetVisible(true);
	m_Chart.GetAxis().GetLeft().SetMaximum(100);
	m_Chart.GetAxis().GetLeft().SetMinimum(0);
	m_Chart.GetAxis().GetBottom().SetAutomatic(false);
	m_Chart.GetAxis().GetBottom().SetVisible(true);
	m_Chart.GetAxis().GetBottom().SetMaximum(200);
	m_Chart.GetAxis().GetBottom().SetMinimum(0);

	m_Chart.AddSeries(scFastLine);
	m_Chart.Series(0).AddXY(0.0, 0.0, NULL,RGB(255, 0, 0));
	m_Chart.Series(0).AddXY(30.0, 30.0,NULL,RGB(255, 0, 0));

	long leftPos = m_Chart.GetAxis().GetLeft().GetPosition();
	long bottomPos = m_Chart.GetAxis().GetBottom().GetPosition();
	long topPos = m_Chart.GetAxis().GetTop().GetPosition();

	long chartXCenter = m_Chart.GetCanvas().GetChartXCenter();
	long ChartWidth = m_Chart.GetChartWidth();
	long canvasLeft = m_Chart.GetCanvas().GetLeft();

	m_Chart.Repaint();

	m_Chart.GetCanvas().GetPen().SetColor(RGB(0,255,0)); 
	m_Chart.GetCanvas().MoveTo( 100, 200); 
	m_Chart.GetCanvas().LineTo( 100, 200); 

	m_Chart.Repaint();

[Sandra]

Hello yvb,

The values of leftPos, bottomPos and topPos which use the axis GetPosition() function get 0 values. Why?
chartCenter, ChartWidth and canvasLeft get 0 value as well. Why?

The leftPos,bottomPos and topPos, chartCenter,ChartWidth and canvasLeft are 0 because Chart is not painted. So you need use GetEnvironment().InternalRepaint() Chart property, before assign values to variables as do in next lines of code:

Code: Select all

m_Chart.AddSeries(scFastLine);
   m_Chart.Series(0).AddXY(0.0, 0.0, NULL,RGB(255, 0, 0));
   m_Chart.Series(0).AddXY(30.0, 30.0,NULL,RGB(255, 0, 0));
   m_Chart.GetEnvironment().InternalRepaint();
  long leftPos = m_Chart.GetAxis().GetLeft().GetPosition();
   long bottomPos = m_Chart.GetAxis().GetBottom().GetPosition();
   long topPos = m_Chart.GetAxis().GetTop().GetPosition();

   long chartXCenter = m_Chart.GetCanvas().GetChartXCenter();
   long ChartWidth = m_Chart.GetChartWidth();
   long canvasLeft = m_Chart.GetCanvas().GetLeft();

Drawing line on the canvas with MoveTo() LineTo() using several different values of argumnets don't draw any line. Why?

I recommend two thinks:
First: Don’t add the same values in MoveTo and LineTo for example you can change values of MoveTo to half
Second: Use MoveTo and LineTo in the AfterDraw event.

I hope will helps.

Thanks,

[yvb]

Hi Sandra,
Thanks. It works.
yvb

[Sandra]

Hello yvb,

I am glad that it works for you .

Thanks,