Print Preview Enhancements

New users of this class will have to visit Robin's article for the relevant download material and then update the .cpp/.h files with the versions provided in this article. Old users of the class can just replace their existing .cpp/.h files with these.

Overview of New Functionality

This is an update of the nice class provided in Robin's article and includes the following features:
  • The print preview will now never show empty preview pages unless the user views 2 pages of output when only 1 is available.
  • Print preview will now respond to WM_MOUSEWHEEL messages appropriately. In "zoom out" mode, it will scroll you through the pages of output. In "zoom in" mode, it will scroll the output page up/down.

Implementation Details

For the mouse wheel to work correctly, you will have to override your CMainFrame::PreTranslateMessage() function as follows:
BOOL CMainFrame::PreTranslateMessage(MSG* pMsg) 
{
 // TODO: Add your specialized code here and/or call the base class
 if (pMsg->message == WM_MOUSEWHEEL)
 {
  CView *pView = GetActiveView() ;
  if (pView != NULL)
   pView->SendMessage(WM_MOUSEWHEEL, pMsg->wParam, pMsg->lParam) ;
 }

 // call the base class here
}
This is required because in print preview mode, the WM_MOUSEWHEEL messages go to the CDialogBar in the window and not directly to the view. This was the only way I could find of easily getting these messages to the CMyPreviewView window.

Downloads

Download source - 6 Kb


About the Author

Roger Allen

Its me!

Comments

  • Article no longer updated

    Posted by Legacy on 12/06/2002 12:00am

    Originally posted by: Roger Allen

    If your interested in this or any other printing article, I maintain my printing articles over on codeproject.

    Reply
Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • IBM Worklight is a mobile application development platform that lets you extend your business to mobile devices. It is designed to provide an open, comprehensive platform to build, run and manage HTML5, hybrid and native mobile apps.

  • There has been growing buzz about DevOps. DevOps is a methodology that unites the often separate functions of software development (Dev) and production and operations (Ops) into a single, integrated, and continuous process. DevOps is about breaking down the barriers between Dev and Ops. It leverages people, processes, and technology to stimulate collaboration and innovation across the entire software development and release process. Dev and Ops should always be part of an integrated process, but that's not …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date