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Greg Reese
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 Posted: Wed May 24, 2006 7:14 pm Post subject: "Type name expected" error with custom component |
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I have BDS2006 with Patch 2. I made a component, TMemoAutosize,
that is derived from TMemo. All the new component does is
publish the AutoSize property. I installed the component in the
tool palette.
Now I drop a TMemoAutosize on an SDI app. The header for the
main form of the app is
#ifndef SDIMainH
#define SDIMainH
// tons of includes
#include "MemoAutosize.h" // line A
class TSDIAppForm : public TForm
{
__published:
// lots of pointers
TMemoAutosize *MemoAutosize1; // line B
private:
//etc
};
extern TSDIAppForm *SDIAppForm;
#endif
When I try to compile the unit SDIMAIN.CPP, the compiler gives
the error
E2303 Type name expected
for line B above. I thought I could try commenting out line A
and putting in a forward declaration class TMemoAutosize;
in its place, but if I do the compiler adds a new copy of line A
right where the old (commented out) line is!
Any suggestions?
Thanks.
Greg |
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Remy Lebeau (TeamB)
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| Posted: Wed May 24, 2006 10:14 pm Post subject: Re: "Type name expected" error with custom component |
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"Greg Reese" <kittythebulldog-1 (AT) yahoo (DOT) com> wrote in message
news:4474a9b7$1 (AT) newsgroups (DOT) borland.com...
| Quote: | #include "MemoAutosize.h" // line A
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What does the content of that file actually look like?
Gambit |
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Greg Reese
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| Posted: Fri Jun 02, 2006 1:09 am Post subject: Re: "Type name expected" error with custom component |
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| Quote: | #include "MemoAutosize.h" // line A
What does the content of that file actually look like?
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It looks like something it shouldn't look like! It was pulling
in an old version of code. That's fixed now and it's compiling.
Thank you.
The component doesn't seem to be working though.
What I would like to do is to have the memo fit itself to
whatever text I put in. (The text changes dynamically.) I
derived from TMemo and the only thing I did was set AutoSize
to true. The autosizing doesn't seem to work though. All I
get is a box of the design-time width and the height of one
line of text. Do I need to do anything more with AutoSize to
get it to work, e.g., Refresh(), Repaint() (neither of which
helped).
Thanks.
Greg |
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Remy Lebeau (TeamB)
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| Posted: Fri Jun 02, 2006 3:44 am Post subject: Re: "Type name expected" error with custom component |
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"Greg Reese" <kittythebulldog-1 (AT) yahoo (DOT) com> wrote in message
news:447f497e$1 (AT) newsgroups (DOT) borland.com...
| Quote: | What I would like to do is to have the memo fit itself to
whatever text I put in. (The text changes dynamically.) I
derived from TMemo and the only thing I did was set
AutoSize to true. The autosizing doesn't seem to work
though. All I get is a box of the design-time width and
the height of one line of text.
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That is by design. AutoSize in TMemo only effects the Height, never the
Width. You would have to resize the Width manually.
Gambit |
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Greg Reese
Guest
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| Posted: Fri Jun 02, 2006 4:15 pm Post subject: Re: "Type name expected" error with custom component |
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| Quote: | What I would like to do is to have the memo fit itself to
whatever text I put in. (The text changes dynamically.) I
derived from TMemo and the only thing I did was set
AutoSize to true. The autosizing doesn't seem to work
though. All I get is a box of the design-time width and
the height of one line of text.
That is by design. AutoSize in TMemo only effects the Height, never the
Width. You would have to resize the Width manually.
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That's okay, I can live with setting the width manually. The
problem is that the height isn't changing. Specifically, when
the memo appears its height has been changed from the design
height of several text lines to only one text line. The width
stays the same as the design width, as you said. How can I make
the height change automatically whenever I put new text in the
memo?
Thanks.
Greg |
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Remy Lebeau (TeamB)
Guest
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| Posted: Sat Jun 03, 2006 12:02 am Post subject: Re: "Type name expected" error with custom component |
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"Greg Reese" <kittythebulldog-1 (AT) yahoo (DOT) com> wrote in message
news:448056b0 (AT) newsgroups (DOT) borland.com...
| Quote: | How can I make the height change automatically whenever
I put new text in the memo?
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After digging into it further, the AutoSize functionality is specifically
designed to only size the component to the height of 1 line. That's
probably why TEdit sets AutoSize to true and TMemo sets it to False by
default. I don't see any readily available way to accomplish what you want,
other than to leave AutoSize to false and then override the virtual Change()
method to do the resizing every time the text changes. TCustomEdit uses
GetTextMetrics() to calculate the height of a line. You can also use
DrawText() to account for multiple lines.
Gambit |
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Greg Reese
Guest
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| Posted: Mon Jun 05, 2006 5:53 pm Post subject: Re: "Type name expected" error with custom component |
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"Remy Lebeau \(TeamB\)" <no.spam (AT) no (DOT) spam.com> wrote:
| Quote: |
"Greg Reese" <kittythebulldog-1 (AT) yahoo (DOT) com> wrote in message
news:448056b0 (AT) newsgroups (DOT) borland.com...
How can I make the height change automatically whenever
I put new text in the memo?
After digging into it further, the AutoSize functionality is specifically
designed to only size the component to the height of 1 line. That's
probably why TEdit sets AutoSize to true and TMemo sets it to False by
default. I don't see any readily available way to accomplish what you want,
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Bummer.
| Quote: | other than to leave AutoSize to false and then override the virtual Change()
method to do the resizing every time the text changes. TCustomEdit uses
GetTextMetrics() to calculate the height of a line. You can also use
DrawText() to account for multiple lines.
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Okay, I'll give those a try. Thanks for looking into this, Remy.
Greg Reese |
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