2 Visual Components Manuals

In this dialog box (color settings for a touch button), the color variable refers to the two adjustable colors of the
same group. The left−hand color defines the foreground color. The right−hand color defines the background
color. This color information is read into the high byte and low byte of the color variable.
The color variable must be a 16−bit UINT data type. From these 16 bits, 8 bits are used for the foreground color
and 8 bits for the background color. In this way, 256 color shades are possible for both the foreground and
background color.
Bit
No.
Dec.
Value
Hex
Value
0−7 255 0x00FF Background
8−15 65280 0xFF00 Foreground
4.8.2.3 Application Possibilities
Name Description
The background color of the element is set with the lower 8 bits of the
color variable. All 256 colors from the color palette of the current project
can be used.
Setting 255 is transparent, i.e. the corresponding area is not colored. This
setting does not work with all fields and can only be used if the picture
does not change after it is constructed.
The foreground color of the element is set with the upper 8 bits of the
color variable.
It is not possible to cover all of the details of such an implementation in this section. Applications and concrete
examples in C and Automation Basic can be found in the Tips and Tricks section.
• 4.8.2.3.1 Using Static Texts as Status Indicators
Status indicators can be easily displayed using the color variable and static texts.
Introduction to Visual Components 2.3
The application sets the color value for static text depending on the state of the option to be indicated. If
the foreground and background are set to the same value, the surface will be displayed as one color.
Otherwise, the text is displayed with the respective color.
In this way, indicators such as 'Motor Off', 'Motor On', and 'Motor Error' can be implemented using
simple color switching.
360 4.8.2.3 Application Possibilities