Retained mode textbox

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

pyda001@ec.auckland.ac.nz - 29 Jun 2006 06:25 GMT

I'm making a retianed mode drawing system. In my application I want to
make the users able to create textboxes similar to the ones used in
e.g. PowerPoint.

So far the application lets the user create the textboxes. My issue
arises when the user doubleclicks the textbox and I superimpose a
RichTextBox exactly over the extents of my retained mode textbox. The
user should be able to edit the text in the textbox, but no matter how
I tweak the RichTextBox it moves the text slightly compared to the
underlying text. I can also foresee an upcoming problem when I let the
user have two or more fonts in the same textbox.

Anyone have dealt with this before? Is the RichTextBox the right
control to use or should I recreate this entire control from scratch?

- Peder -

Reply to this Message

William Sullivan - 30 Jun 2006 15:56 GMT

Why not just replace the textboxes with RichTextBoxes?

Alternatively, bring up a small form to allow users to enter text, then
populate the text boxes with the results of this operation?

Personally, I'd try to just use RTB's everywhere. But I'm lazy.

> I'm making a retianed mode drawing system. In my application I want to
> make the users able to create textboxes similar to the ones used in
[quoted text clipped - 12 lines]
>
> - Peder -

Reply to this Message

pyda001@ec.auckland.ac.nz - 30 Jun 2006 18:05 GMT

Maybe I wasn't making myself clear enough so I'll try to explain once
more.

I'm creating a retained mode drawing system. A textbox in this context
is not a control, but a GDI+ drawn element using DrawRectangle(),
FillRectangle, and DrawString(). However, it seems text rendering is
different in GDI+ and inside the RichTextBox. It either doesn't fit
right, wraps around the wrong way, or has the wrong width compared to
DrawString.

I picture I could create a control that behaves like a RichTextBox and
does my work, but this is a lot of work if there is a simpler solution.
I'm sure this has been solved before, hence this post.

Anyone?

- Peder -

Reply to this Message

William Sullivan - 30 Jun 2006 19:39 GMT

Well, I don't think its either a simple problem or that anybody else has
tried to do this before. I think your best bet would be to pop up a form
that takes the imput rather than try to fool the user into thinking they are
manipulating the text on the image itself. Good luck on the prob, tho.

> Maybe I wasn't making myself clear enough so I'll try to explain once
> more.
[quoted text clipped - 13 lines]
>
> - Peder -

Reply to this Message

pyda001@ec.auckland.ac.nz - 30 Jun 2006 23:02 GMT

Well, I never said I thought it would be a simple problem. On the
contrary. However, the dialog-box solution is exactly what I want to
avoid. I'm making a "presentation program light" as my thesis project
and would like to mimic the PowerPoint-style textboxes. They should
support in-place editing or the interface will become a joke. So far
I'm just out fishing for ideas on how to do this. I can picture
developing a new control which behaves almost exactly like the
RichTextBox, but that uses drawstring to refresh the graphics instead
of the built-in rendering of the RichTextBox. However, this will mean a
hellofalot of work if you take into account all the different events,
mouse selecting of text, cutting, copying, pasting, indenting,
bulleting, and so on.

- Peder -

Reply to this Message

Retained mode textbox

Free Magazines