B4J Question xGraph: Sizing of plotting surfaces

klaus said:

This is how it is designed.
This library is based on a program I had written some decades ago to do graphic data analysis.
In this program we could export graphs to Word for our reports.
These graphs had two grid types : 10mm or 5mm on the printed paper.
This gave also fixed grid values on the screen.

In the library, I calculate the available width for the graph depending on the margins, scale values and axis text.
Then I divide this width by the number of X intervals which gives the width of the grid and this remains constant.
Then, I calculate the optimum scale interval values which are either 1, 2, 2.5, 5, 10 (1!2!2.5!5!10).
Depending on the scale interval value, the number of grid intervals is not the same.
In your example you have:
-200 to 0, gives a scale interval value of 10 and 20 intervals.
-1200 to 0 gives a scale interval value of 100 but with only 12 intervals, and because the grid width is the same the graph width is smaller.

What you could do is to select the other ScaleXValues property with these values 1, 1.2, 1.5, 1.8, 2, 2.5, 3, 4, 5, 6, 7, 8, 9, 10 (1!1.2!1.5!1.8!2!2.5!3!4!5!6!7!8!9!10).
Or you can define your own, the first number must be 1 and the last must be 10. In between you can add any numbers separated by an exclamation point.

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