• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 2454
  • Last Modified:

Drawing squares, circles, and painted rectangles in Borland C++ Builder

Hi everybody,

I'm new in this community and in the C++ also...

I know that this question is too easy to answer but I realy would like this help.
In C++ Builder I have a form and a ScrollBox. How can I draw a square, a circle, a painted rectangle, a line and write a single char inside the ScrollBox but without using a TShape or TLabel component ?
If you have an example script it would be great!

ps: I don't want to use TShape component because actually I need to draw hundreds of shapes in the scrollbox and I think if I use a TShape or TLabel it will consume a lot of CPU...

Thanks
0
PETERJORDAN
Asked:
PETERJORDAN
1 Solution
 
DelphianCommented:
TScrollBar doesn't have a Canvas. And you need it to Draw.

You have some choices:
1- Derive your own  TScrollBar and add a canvas to it
2- Replace the TScrollBar for a control that have a Canvas property
3- Use a TPaintBox. Appear to me that control is designed to be a
a drawings'  blackboard

Tips:
#1 Way
See the code on Forms unit (TCUstomForm class) - it's pascal but the changes to
C++ are minimal and are easier to read (if you can read C++ code, pascal is not
a problem). Read on help about TControlCanvas unit

#2 Way
You can use a Panel. Or research on VCL source code for other containers
with a canvas (don't look on help - go rightly to source code)

#3 Way
No need. Press F1.

I hope this helps,

Fabricio
0

Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

Tackle projects and never again get stuck behind a technical roadblock.
Join Now