How to Scroll windows in MFC application? HELP!!!

[maggie]

Hi, All

I am drawing pictures using "polyline" and "Arc" functions. I opened a
new MFC application, and modified the OnDraw function in CDrawerView.
The OnDraw function read data from files and draw lines and arcs
according to the data.
but the datafile is big, so the lines and arcs can not be displayed in
one window. I need scroll the window. I am stuck on making the window
scrollable.
I tried to change the CREATESTUCT cs 's style in PreCreateWindow
function in CDrawerView. And tried to replace default function
OnHVScroll. It just does not work. Can someone help me, please!!!

Thanks a lot.

 

[Mike Wahler]

Hi, All

I am drawing pictures using "polyline" and "Arc" functions. I opened a
new MFC application, and modified the OnDraw function in CDrawerView.
The OnDraw function read data from files and draw lines and arcs
according to the data.
but the datafile is big, so the lines and arcs can not be displayed in
one window. I need scroll the window. I am stuck on making the window
scrollable.
I tried to change the CREATESTUCT cs 's style in PreCreateWindow
function in CDrawerView. And tried to replace default function
OnHVScroll. It just does not work. Can someone help me, please!!!

This newsgroup is only for discussion of the ISO standard C++
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-Mike

 

[Raymond Martineau]

Hi, All

I am drawing pictures using "polyline" and "Arc" functions. I opened a
new MFC application, and modified the OnDraw function in CDrawerView.
The OnDraw function read data from files and draw lines and arcs
according to the data.

You won't get much help for system-specific issues here. You might want to
try the following newsgroups:

MS/Windows: Mice, DLLs, hardware
MS 32-bit API

but the datafile is big, so the lines and arcs can not be displayed in
one window. I need scroll the window. I am stuck on making the window
scrollable.
I tried to change the CREATESTUCT cs 's style in PreCreateWindow
function in CDrawerView. And tried to replace default function
OnHVScroll. It just does not work. Can someone help me, please!!!

When you post on the two newsgroups listed, you should also include a small
bit of code to help people diagnose the problem. Even if I am familiar
with windows, I wouldn't be sure what the context would be, and might give
generic scrolling code that is not efficient on an MFC application.

But in any case, I normally put WS_VSCROLL in the .style field for the
CREATESTRUCT and let the callback procedure handle the WM_VSCROLL function.
From there, I'd have the painting region set the Window and Viewport
mappings before redrawing the invalidated region.

 

[maggie]

Thank you for your kind suggestion though before I read your reply,
posted another one. :8)