[WISH] Change the precision of Scale property in TechDraw

[steelman]

Hi,

I've been learning Arch for last couple of weeks and I am now preparing some drawings in TechDraw. I found that the Scale property of DrawView is of type App::PropertyFloatConstraint which limits its precision to what is set in preferences. On one hand millimeter precision (zero decimal places) is enough for Arch (OK, i've got it set to two, so I can work with smaller sketches) on the other hand two decimal places is definitely too little for scaling building drawings to A4/A3. I can only choose between 0.02 (the drawing could be bigger) and 0.03 (the drawing doesn't fit the page). The perfect scale in my case is 0.025 (1:40) but I can't set it without changing precision globally and I don't want three decimal places everywhere else.

Please consider either of the following:

• changing the type of Scale in DrawView to PropertyPrecision (although 16 decimal places seems too much)
• creating dedicated class (like PropertyPrecision) with separately adjustable precission (Preferences →TechDraw → Scale)
• something more general?

Note: I've got limited resources at hand now, so I can't setup C++ development environment for FreeCAD now and I won't be able to provide patches myself. Please understand.

[M4x]

I think this should be moved to the TD section.

[tpavlicek]

Hi steelman,

The perfect scale in my case is 0.025 (1:40) but I can't set it without changing precision globally

Though not quite comfortable - you will still see number "0.03" in properties - there is a workaround: Enter the Scale "0.025" as an expression. This works, if you need the value really bad.

Kind regards,


Tomas

[M4x]

Regarding scales: I use to type something like 1/40

[steelman]

Enter the Scale "0.025" as an expression. This works, if you need the value really bad.

Thanks, Tomas! This seem like an acceptable workaround. However, I still think a single global precision setting is too coarse.