Dynapro Technologies Dynapro ET TCS, Application Developer'S Manual

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the designated character set so the contents of the character set match that of the character
font.
4. If the host subsequently changes the contents of a dynamic character font that is mapped into
one of the character sets, the change is reflected immediately in the appropriate character set
and appears on the display.
The following pages describe each of the above commands. When manipulating character sets or
character fonts, remember the these points:
•
The TCS uses only the Standard and Extended Character Sets to form the characters on the
display. Changes to either dynamic character font do not become visible until the dynamic
character font is mapped into a character set using the Map Character Font command. Once
the dynamic character font is mapped into either character set by the Displayed Screen,
subsequent changes to the dynamic character font are automatically reflected in the display
contents.
•
To change the contents of a dynamic character font without affecting the appearance of the
display, that dynamic font must not be mapped into either character set by the Displayed
Screen while it is being changed.
•
The Static Character Fonts cannot be changed by the host program. They are stored in ROM
and can only be mapped into the character sets or copied into the dynamic character fonts.
•
Although the TCS can store many screens, there are only two character sets and four
character fonts within the entire TCS. Each screen must share these resources. However, the
Character Set Mapping that determines which of the four character fonts is mapped into the
two character sets is screen-dependent. That is, each screen may specify a different mapping,
which is automatically used whenever that screen is copied into the Displayed Screen. See
Screen Memory Commands further on in this chapter for details.
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The host can successfully operate the TCS without using the available features of the character
sets and fonts because the TCS ensures that the character set mapping and the contents of the
dynamic character fonts are initialized in such a way that the programmer need not worry about
it.
Unless changed by the host, the TCS automatically:
•
Maps the Static ASCII Character Font into the Standard Character Set.
•
Maps the Static Special Character Font into the Extended Character Set.
•
Copies the Static ASCII Character Font into Dynamic Character Font 1.
•
Copies the Static Special Character Font into Dynamic Character Font 2.