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  • Article no longer updated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  • Your email address will not be published.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

  • Live Event Date: October 29, 2014 @ 11:00 a.m. ET / 8:00 a.m. PT Are you interested in building a cognitive application using the power of IBM Watson? Need a platform that provides speed and ease for rapidly deploying this application? Join Chris Madison, Watson Solution Architect, as he walks through the process of building a Watson powered application on IBM Bluemix. Chris will talk about the new Watson Services just released on IBM bluemix, but more importantly he will do a step by step cognitive …

  • A modern mobile IT strategy is no longer an option, it is an absolute business necessity. Today's most productive employees are not tied to a desk, an office, or a location. They are mobile. And your company's IT strategy has to be ready to support them with easy, reliable, 24/7 access to the business information they need, from anywhere in the world, across a broad range of communication devices. Here's how some of the nation's most progressive corporations are meeting the many needs of their mobile workers …

Most Popular Programming Stories

More for Developers

Latest Developer Headlines

RSS Feeds