Re: [Dev-C++] Help Please. ( Scrolling the client area with graphics)

[Per W. <pw...@ia...>]

This is how graphics works in most graphical environments, i.e. it is up
to the application to keep track of what is drawn and to repaint the
window on request.

Paint to a bitmap and redraw the bitmap suitably scrolled whenever the
window gets a repaint command. Or work with vector graphics, i.e. keep a
list of all draw commands needed to redraw the graphics and then walk
through the list and repaint all lines, circles, characters.

There are some libraries - or sample code - that performs the above
operations. Select a graphics library of your choice and check through the
example programs.

/Per W

On 22 Sep 2004, santhosh shenoy p wrote:

> Hi ,
>      I'm Santhosh an engineering student. Right now I'm doing a project on graphics using devc++ 4.8 . I have a problem.
> The problem is that once I draw line or a text on the window and scroll the  vertical scroll bars the lines  that I had drawn would get erased.
> kindly suggest me way so that any graphics I put on the screen at runtime and then even after scrolling the scroll bars the graphics thus scrolled should not get erased after unscrolling later.
>
> Eagerly waiting for your kind  and a positive response.
> Santhosh.
>