Icon design





The icon of a Modelica class shall consider the following guidelines:

Color and Shapes

The main icon color of a component shall be the same for all components of one library. White fill areas of an icon shall not be used to hide parts of an icon, see#2031.In the Modelica Standard Library the following color schemes apply:

Package Color RGB code Color sample
Modelica.Blocks {0,0,127}
Modelica.ComplexBlocks {85,170,255}
Modelica.StateGraph {0,0,0}
Modelica.Electrical.Analog {0,0,255}
Modelica.Electrical.Digital {128,0,128}
Modelica.Electrical.Machines {0,0,255}
Modelica.Electrical.MultiPhase {0,0,255}
Modelica.Electrical.QuasiStationary {85,170,255}
Modelica.Electrical.Spice3 {170,85,255}
Modelica.Magnetic.FluxTubes {255,127,0}
Modelica.Magnetic.FundamentalWave {255,127,0}
Modelica.Magnetic.QuasiStatic {255,170,85}
Modelica.Mechanics.MultiBody {192,192,192}
Modelica.Mechanics.Rotational {95,95,95}
Modelica.Mechanics.Translational {0,127,0}
Modelica.Fluid {0,127,255}
Modelica.Media none
Modelica.Thermal.FluidHeatFlow {0,0,255}
Modelica.Thermal.HeatTransfer {191,0,0}
Modelica.Math none
Modelica.ComplexMath none
Modelica.Utilities none
Modelica.Constants none
Modelica.Icons none
Modelica.SIunits none

Icon size

The icon of a Modelica class shall not be significantly greater or smaller than the default Diagram limits of 200 units x 200 units. These default diagram limits are

  • -100 units ≤ horizontal coordinate ≤ +100 units
  • -100 units ≤ vertical coordinate ≤ +100 units

If possible, the icon shall be designed such way, that the icon name %nameand the most significant parameter can be displayed within the vertical Diagram range of the icon.

(a) (b)
Fig. 1: (a) Typical icon, (b) including dimensions

Component Name

The component name %name shall be in RGB (0,0,255) blue color.

  • Text height: 40 units
  • Text width: 300 units

The text shall be located above the actual icon. If there is enough space, the upper text limit of the component nameshall be 10 units below the upper icon boundary, see Fig. 1.

If the icon is as big as the entire icon range of 200 units x 200 units, e.g. in blocks,the component name shall be placed above the icon with vertical 10 units of space between icon and lower text box, see Fig. 2.

Fig. 2: Block component name

If there is a connector located at the top icon boundary and it is obvious that this connector influences the modelbehavior compared to a similar model without such connector, then a line from the connector to the actual iconshall be avoided to keep the design straight, see Fig. 4. If it is required to use a line indicating the connector dependency, thenthe line shall be interrupted such that this line does not interfere with component name.

Fig. 3: Component name between actual icon and connector

In some cases, if there is not alternative, the component name has to be placed below the actual icon, see. Fig. 4.

Fig. 4: Component name below actual icon

Parameter Name

One significant parameter shall be placed below the icon, see Fig. 1 and 2. The parameter name shall be RGB (0,0,0) black color.

  • Text height: 40 units (or 30 units, minimum 20 units, if required)
  • Text width: 300 units

The parameter text box shall be placed 10 units below the actual icon.

Connector location

Physical connectors shall always be located on the icon boundary. Input and output connector shall be placed outside the icon, see Fig. 2 and 3.Preferred connector locations are:

  • at the four corners of the icon diagram, see Fig. 5
  • at vertical or horizontal symmetry line of an icon, see Fig. 1-3
  • alternative connection points shall be located in a raster of 20 units (or 10 units) if required, see Fig. 4

Fig. 5: Connectors located at the four corners of the icon diagram

Diagram icons

Icons drawn in the Diagram layer shall be avoided. Particularly, icons of Diagram layer shall be avoided which are equal to theicons of the Icon layer. Any graphical illustrations shall be moved to the HTML documentation instead.