Hi Peter,
I have an XY scatter layer with the (0,0) location in the middle of the plot. Depending on what scale the user selects, I adjust the X & Y minimum and maximum range values. Everything works fine until I try to make the minimum / maximum less than 1. Then I lose my 4 quadrant mode and the axis range doesn't seem to do what I want. I threw together a quick example based on your scatter chart example. In the code, if Scalemin and Scalemax are set to -1 and 1 (respectively) or "greater", then it works fine. If you set them to -.5 and .5, then you only get quad 1 and the range goes from 0 to 100.
TIA
-Raoul
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Friend Sub forumexample()
' The XY points for the scatter chart
Dim dataX0() As Double = {0.2, -0.1, 6, 12, 14, 8, 13, 13, 16, 12, 10.5}
Dim dataY0() As Double = {-0.4, 0.1, 80, 110, 110, 105, 130, 115, 170, 125, 125}
Dim scalemin As Integer = -0.5
Dim scalemax As Integer = 0.5
' Create an XYChart object
Dim c As XYChart = New XYChart(350, 350, Chart.metalColor(&H9999DD), &H0, 1)
c.setRoundedFrame(Chart.CColor(Main.BackColor))
' Set the plotarea
c.setPlotArea(40, 50, 275, 275, &HFFFFFF, -1, -1, &HCCCCCC, &HCCCCCC)
c.setClipping()
' Add a title to the chart using 15 pts Times New Roman Bold Italic font, with a light
' grey (dddddd) background, black (000000) border, and a glass like raised effect.
c.addTitle("Position Data [mrad]", "Times New Roman Bold Italic", 15
).setBackground(&HDDDDDD, &H0, Chart.glassEffect())
' Configure the x-axis to auto-scale with at least 75 pixels between major tick and 15
' pixels between minor ticks. This shows more minor grid lines on the chart.
c.xAxis().setTickDensity(75, 15)
' Set the axes width to 2 pixels
c.xAxis().setWidth(2)
c.yAxis().setWidth(2)
c.xAxis().setLinearScale(scalemin, scalemax)
c.yAxis().setLinearScale(scalemin, scalemax)
c.xAxis.setAutoScale(0, 0)
c.yAxis.setAutoScale(0, 0)
c.yAxis.setRounding(False, False)
c.xAxis.setRounding(False, False)
c.setAxisAtOrigin(Chart.XYAxisAtOrigin, Chart.XAxisSymmetric + Chart.YAxisSymmetric)
' Add a scatter chart layer
c.addScatterLayer(dataX0, dataY0, "", Chart.GlassSphereShape, 6, Chart.CColor(Color.Blue))
' Assign the chart to the WinChartViewer
Main.WinChartViewer1.Chart = c
End Sub |
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4 quadrant mode - Axis range < 1