Hello, I've looked all over the place, but found nothing that could solve my problem.

I'm using FlowChart.NET 4.3.1 and can not upgrade to 5 at this moment.

I have an application that has a FlowChart object inside a Ruler object. The ruler and flowchart their MeasureUnit is usually set to Millimeter, but sometimes to inch. I had to create an indication of the page size on the FlowChart. I do this by drawing a line on the flowchart at the correct height and width of the flowchart (for example a vertical line at 210 mm for an A4 page).

This works well, and all elements are on the screen at exactly the same place as they are on the paper.

But now I must allow users to select a font size. I also want the fonts to scale when the user hits "Fit To Page" in the print preview.

I am aware all fonts should have the GraphicsUnit set as World to allow scaling. So my thought was to set everything to World, and then allow the user to choose the font size, for example in Mm. However... when I convert the size from Millimeter to World things go wrong. I set for example 10 mm, but the font on the screen is about 30 mm, which is what I can see on the ruler.

So setting the font size to 10 mm won't give me a text that is 10 mm, but a lot bigger.

I also tried to take the default font size I have for the FlowChart, convert this to World and set the diagramm font size to World, with the converted size value. I expected the size to not change, but it did.

If I look at the SizeInPoints property before and after this last action, it remains the same. So the font-size did not change, but it is represented bigger on the screen... any ideas?

I think I don't really understand the "World" GraphicsUnit.

Thanks in advance

Thanks for the quick reply. I should have mentioned I was using the method from the post you linked to.

I think I was using it the wrong way. But just to be sure, I'll tell you what I understand from it now:

The Convert method is needed to convert from some GraphicsUnit, to the FlowChart.MeasureUnit. Using the call:

value = Convert(someSize, GraphicsUnit.Millimeter, MyFlowChart.MeasureUnit)
 

Assuming someSize is the wanted size in millimeter.

Then we use the value to create a font size with value as size and World as GraphicsUnit.

We can do the same for any kind of size, be it point, inch, ...

This certainly gives me a more realistic font size.

See what I was doing first was this:

value = Convert(someSize, GraphicsUnit.Millimeter, GraphicsUnit.World)
// Make the font with value as size and World as Unit...
 

I allready thought this made no sense because World was not in the switch case... but I didn't understand "world" anyway. Now I think I do.

Thanks anyway, I get a bit slow on fridays

(Great software and support btw)