ProjectsForTest/WinForm.NET5TeeChart-NET-Pro-Samples/Axis/Axis_Isometric.cs

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using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;
using Steema.TeeChart;
using System.Runtime.InteropServices;

namespace Steema.TeeChart.Samples
{
	public class Axis_Isometric : Steema.TeeChart.Samples.BaseForm
	{
    private System.Windows.Forms.Button button1;
		private Steema.TeeChart.Styles.Line line1;
		private System.ComponentModel.IContainer components = null;

    private void MakeIsometric(Axis vertical, Axis horizontal)
    {
      if ((vertical.Chart.Width > 0) && (vertical.Chart.Height > 0))
      {
        // setup values
        double xrange = horizontal.Maximum - horizontal.Minimum;
        double yrange = vertical.Maximum - vertical.Minimum;
        double tmpx = xrange/(double)vertical.Chart.Width;
        double tmpy = yrange/(double)vertical.Chart.Height;

        Screen screen = Screen.FromControl(this);
        Graphics g = Graphics.FromHwnd(this.Handle);        
        IntPtr hptr = g.GetHdc();
        double xyscreen = GetDeviceCaps(hptr,HORZSIZE)*screen.Bounds.Height;
        xyscreen /= (double)GetDeviceCaps(hptr,VERTSIZE)*screen.Bounds.Width;
        g.ReleaseHdc(hptr);
        g.Dispose();

        tmpy *= xyscreen;
        double offset = 0.0;
        if (tmpx > tmpy)
        {
          if (tmpy != 0.0)
          {
            offset = 0.5*(yrange*tmpx/tmpy-yrange);
            vertical.SetMinMax(vertical.Minimum-offset,vertical.Maximum+offset);
          }
        }
        else if (tmpx < tmpy)
        {
          if (tmpx != 0.0)
          {
            offset = 0.5*(xrange*tmpy/tmpx-xrange);
            horizontal.SetMinMax(horizontal.Minimum-offset,horizontal.Maximum+offset);
          }
        }
      }
    }

    private void MakeIsometric(Styles.Series series)
    {
      MakeIsometric(series.GetVertAxis,series.GetHorizAxis);
    }