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CProgressFX and CHourglassFX

, 26 Sep 2001
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Two animation provider classes to add animation effects to any CWaitingTreeCtrl-derived class
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What are they?

Here I present some animation provider classes that you may use with any CWaitingTreeCtrl-derived class (see article). They're just examples now, they can serve you as starting points to implement much butter animation effects, but they can also be used "as-is" in your little projects.

CProgressFX

This animation provider simply displays a progress bar while populating the tree.

Sample application

If the total count of items to add is known, it shows a linear progress bar, otherwise it maps the current progress (which would grow indefinitely) into a finite range allowing the bar to be displayed.

CHourglassFX

This animation provider simply displays an animated icon with the well-known hourglass.

Sample application

Note: I finally found the reason why my animated icons were successfully loaded only when linking to MFC dynamic libraries, and it doesn't have anything to do with MFC. The application I used to produce the animated icon, saved the file specifing the wrong size in the RIFF header. Those extra 8 bytes caused the system to read past the end of file, finding zeroes with dynamic libraries and the standard MFC resources with static libraries. It interpreted the zeroes like an EOF marker and returned successfully, while it didn't like the other bytes of subsequent resources thus returning a failure. The correct value in the RIFF header is the file size minus 8, so I just changed the double-word at offset 4 in the VC++ resource editor and got my icon even in static builds.

Using the Classes

Using animation provider classes is very easy. Suppose you have created your own content provider class: CMyTreeCtrl. If you want to add one or more animations you declare a variable as follows:

#include "MyTreeCtrl.h"

#include "ProgressFX.h"
#include "HourglassFX.h"

...

    CProgressFX< CHourglassFX< CMyTreeCtrl > > m_ctlMyTree;
 

And this is the result:

Sample application

Updates

17 Oct 2000

Initial public release.

27 Sep 2001

Fixed bug with animated icons
License changed to Artistic License

Conclusion

I hope there's someone who likes these classes and who wants to write his own. You may implement a new animation with an external progress control, or with a user selectable animated cursor, or with a message text that reports remaining items to load (like VS Class View), or everything you can imagine. If you do, it would be nice to see a new article about it. I will appreciate any comment, suggestion or improvement.

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

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About the Author

Paolo Messina
Software Developer RoboTech srl
Italy Italy
Paolo began programming at the age of 9 with a glorious 8086 and GW-BASIC, then he played a bit with C, ASM and Pascal. He tought himself MFC and Windows programming, to exploit his studies of C++. Always attracted by low-level programming and Assembly, he's beginning to appreciate the joys of templates and STL. At work he changed his mind about Java, discovered Eclipse IDE, and now think it's cool.
 
He lives in Follonica, Italy.
 
He has been abroad in the U.S. to work on his final thesis before graduating. For seven months he was playing with airplanes and automatic control at the Unversity of Illinois at Urbana-Champaign.
 
He graduated in Computer Science Engineering at the University of Pisa, Italy, in December 2003.
 
Currently working for an edutainment robotics company (www.robotechsrl.com).
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Comments and Discussions

 
GeneralDialog did not respond when the animation activities Pinmembergolocy12-Jun-09 18:42 
QuestionHow to show % completion PinsussAnonymous21-Sep-04 7:53 
AnswerRe: How to show % completion PinmemberPaolo Messina25-Sep-04 7:58 
Generalexcellent idea PinmemberJeremy Falcon7-May-03 12:01 
Questionprogressbar ?? Pinmemberwimel27-Sep-01 22:41 
AnswerRe: progressbar ?? PinmemberPaolo Messina27-Sep-01 23:10 
GeneralWindows CE PinmemberAnonymous24-Apr-01 21:48 
GeneralRe: Windows CE PinmemberPaolo Messina24-Apr-01 23:12 
GeneralRe: Windows CE PinmemberAnonymous27-Apr-01 7:17 
GeneralRe: Windows CE PinmemberAnonymous30-Apr-01 9:41 
GeneralRe: Windows CE PinmemberAnonymous8-Jun-02 23:25 

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