2 Visual Components Manuals

4.3.12.1.1
4.3.12.2 Dynamic Color Control
By connecting a process variable to the 'Colors Variable' field, the color of the respective object or the global
color definitions can be influenced during runtime. The variable to be used must be at least 16 bits − thus, type
INT or UINT.
The higher value byte represents the foreground color (0−255).
The lower value byte represents the background color (0−255).
The text can be set to blink by simply swapping the variable bytes.
If both bytes are set to the same value, then the text is hidden.
The interval and combinations are dependent on the control application.
Note:
The appropriate color values can be found in the general color table. Specific colors can be read directly from
the tool tips index value in the color dialog box. Not all panels provide the same colors. In each case, the table
can be modified to specific user needs.
Example:
A brief example for dynamic color arrangement.
Text blink effect:
/* Task needs to run in a 100 ms task class */
#include #include /* Macros for foreground and background color
definition */ #define VC_COLOR UINT #define COLOR(FOREGROUND, BACKGROUND) ((FOREGROUND