TImage problem

Article View: borland.public.cppbuilder.migration

Article #44

Back to borland.public.cppbuilder.migration Previous Next

#44

From: Cherubino Ferrario
Date: Fri, 24 Feb 2006 15:36

25 lines
1809 bytes

I have a problem with the refresh of the TImage component:
with the Builder 5 Professional if I call the Invalidate method of the 
TImage class, everything is ok.
If I compile the same program with the Builder 6, as soon as I call the 
Invalidate function (or Refresh, or Repaint) the image flashes.

The only way to avoid this effect is to put the TImage directly on the form 
(without using any Panel) and to call theWindows API:

 RECT  Ret;
 Ret.left=ImageCor->BoundsRect.Left;
 Ret.top=ImageCor->BoundsRect.Top;
 Ret.bottom=ImageCor->BoundsRect.Bottom;
 Ret.right=ImageCor->BoundsRect.Right;
 InvalidateRect(Handle,&Ret,false);

But if I use the canvas of the Bitmap to trace a rectangle, I have again the 
flashes.

Is there any property to set (of the TImage, of the Form or of Panel) or any 
way to avoid this effect?

Thanks for the attention.

Cherubino

Technical Details

Message-ID: <43ff280d@newsgroups.borland.com>

Path:

arc1-ca.pugleaf.net!g2news1.google.com!news3.google.com!news4.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!newsgroups.borland.com!not-for-mail

Show Full Headers

Complete Article Headers

X-Google-Thread: 110f51,c9f8349e85aeb834,start
X-Google-Attributes: gid110f51,public
X-Google-Language: ENGLISH,ASCII-7-bit
Reply-To: "Cherubino Ferrario" <cherferr@tin.it>
From: "Cherubino Ferrario" <cherferr@tin.it>
Newsgroups: borland.public.cppbuilder.migration
Subject: TImage problem
Date: Fri, 24 Feb 2006 16:36:39 +0100
Lines: 27
X-Priority: 3
X-MSMail-Priority: Normal
X-Newsreader: Microsoft Outlook Express 6.00.2900.2180
X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180
X-RFC2646: Format=Flowed; Original
NNTP-Posting-Host: 217.56.86.209
Message-ID: <43ff280d@newsgroups.borland.com>
X-Trace: newsgroups.borland.com 1140795405 217.56.86.209 (24 Feb 2006 07:36:45 -0700)
Path: arc1-ca.pugleaf.net!g2news1.google.com!news3.google.com!news4.google.com!border1.nntp.dca.giganews.com!nntp.giganews.com!newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!newsgroups.borland.com!not-for-mail