Re: Questions about FTC's capabilities
- From: Brendan Murphy <bmurphy@xxxxxxxxxxxxxxxxxxxxx>
- To: ftcdev@xxxxxxxxxxxxx
- Date: Mon, 14 Jul 2008 11:41:18 -0500
Joe Strout wrote:
We're evaluating FTC for use in a something like a drawing
application -- picture little text objects scattered around the
page, and when you click on one, it becomes editable; when you click
away or tab out, then it becomes just drawn text on the page again.
Ultimately we need to be able to export to PDF (using Asher Dunn's
classes), too. Is this a square-peg-in-round-hole situation for
FTC, or is it a comfy fit? Specifically:
FYI, I am intending in the future to directly support Asher Dunn's
PDF classes. I already implemented the infrastructure code that
walks through the FTC's data structures. All that needs to be done
is add the glue code to translates the FTC data into Asher's
method calls.
1. Can FTC be used in some way without a canvas, just telling it to
draw some content within given rectangular bounds? Or, telling me
where the line breaks are and letting me iterate over style runs and
embedded objects, so I can manually draw or export them?
The FTC is canvas based, so the short answer is no.
For rendering when the content is not being edited, you could move
the FTC offscreen and just grab the internal data structures and
render them yourself. You would have to provide glue code to
render the lines in your custom environment, but that would be
pretty straight forward. To fit a particular rectangle you would
adjust the control's dimensions and possibly use the page mode (by
setting the page size to get you page breaks) to tell you how much
text to display. You could also use the line heights to indicate
when to stop rendering lines.
2. Can I make an editable FTC area that's just a rectangular area of
a canvas, rather than the whole thing? (I generally try to avoid
layer canvases on top of each other, but I guess we could try that
if necessary.)
No, it is not designed to do that.
3. Can I link two editable areas together, so that content flows
from one to another? (Picture a multi-column newsletter layout,
where text that flows off the end of column 1 goes to the top of
column 2.)
It is not designed to do that, but you do have access to the
source code, which makes it possible. The question would be if it
is feasible? Without actually trying it I couldn't tell you how
much work it will be. My guess is it would be a fair amount of
work.
4. How hard would it be to make an editable area that grows as
needed to fit the text? (For this, picture a drawing program like
OmniGraffle -- as you add more text, the text box expands downward
to fit.)
I am assuming you are suggesting to have a display area that grows
without the use of scrollbars and you want it to resize itself
as the content grows. I would say this is possible, but I have not
tried it. This is a matter of adjusting the canvas size to fit the
composed sized after you request an update which means you would
override a couple of methods. That shouldn't be to hard to do.
FTC Website:
http://www.truenorthsoftware.com/FormattedTextControl/FormattedTextControl.html
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