[Lazarus] Displaying text with colour and insertion point
Mark Morgan Lloyd
markMLl.lazarus at telemetry.co.uk
Wed May 16 14:24:46 CEST 2012
> On 16/05/2012 09:13, Mark Morgan Lloyd wrote:
>> Does anybody have any suggestions for a component to display status or
>> terminal text that will allow limited enhancement (colour, possibly
>> underline etc.)?
>> Over the last few weeks I've been tinkering with an emulator for an
>> obsolete mechanical terminal (IBM 2741), including support for the APL
>> character set. I started off using a listbox for simple output, noting
>> that this didn't have provision for multiple colours or marking the
>> insertion point. I moved on to stuffing characters into a memo, this
>> allowed me to force a current-position marker but still had no colour.
>> Looking at the CmdLine component, it appears OK as a command window
>> (i.e. accepting keyboard input etc.) but isn't so hot when the
>> principal requirement is to display text pushed into the underlying
>> strings storage from elsewhere: in particular, there isn't a way to
>> force the insertion point marker to the end of what's just been output.
>> I'm sure I'm not the only person who wants to do this sort of thing:
>> does anybody have any recommendations?
> TSynEdit? TSynPosSyn (position highlighter, see examples)
Do you mean that that can now colour arbitrary sequences of characters
(i.e. what you'd expect from a terminal emulator), rather than having to
define things in advance? As an example, see
http://wotho.ethz.ch/APL-1130/2741_APL_Demo.png where everything the
user enters (which starts at the 7th column) is printed in red.
Being able to use a standard component would definitely be an advantage,
since particularly for this project I am very keen on a user with
limited (or no) Pascal experience simply being able to grab the sources
and a copy of Lazarus and compile.
But I must also ask: how long has TSynedit done this? It does appear to
be one of the more fluid parts of the LCL and I'm afraid I'm a bit wary...
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk
[Opinions above are the author's, not those of his employers or colleagues]
More information about the Lazarus