Creating a Hovering Control

Environment: VC6 SP5, WIN2K SP2

This is a template class for creating hovering controls. It uses the _TrackMouseEvent method to recieve notifications regarding mouse events.

To use it, you need to create a new class deriving from the desired type (CButton, CEdit, and so forth) and add the template code there. You also need to override two pure virtual functions: OnOverEnter() and OnHoverLeave(). Your class recieves notifications via those functions. There is also a function called IsHover(), which can return the hovering state.

In the demo project, I've created two simple classes; one is derived from CButton and the other one is derived from CEdit. They both react to mouse events.

#include "TrackControl.h"
class CHoverButton : public CTrackControl<CButton>
{
public:
  virtual void OnHoverEnter()
  {
    Invalidate();
  }
  virtual void OnHoverLeave()
  {
    Invalidate();
  }
}

Downloads

Download demo project - 24 Kb
Download source - 1 Kb


Comments

  • it's awesome!

    Posted by Legacy on 01/07/2004 12:00am

    Originally posted by: jjm

    simple but works fine!

    Reply
  • _TrackMouseEvent() is not Win95 compliant.

    Posted by Legacy on 04/27/2003 12:00am

    Originally posted by: Mouse

    Controls that use _TrackMouseEvent() fail when run on Windows95. The best way to go about catching a "MouseLeave()" event is to use set a timer on the MouseOver event and use WindowFromPoint() API on the timer fire to check if it is still over the control.

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  • Your email address will not be published.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

Top White Papers and Webcasts

  • What if you could rapidly grow your business while eliminating the complexity and multiple operating systems, administration and management tools, and security and compliance requirements? See how many good things happen when you standardize on open, flexible infrastructure solutions.

  • Data integrity and ultra-high performance dictate the success and growth of many companies. One of these companies is BridgePay Network Solutions, a recently launched and rapidly growing financial services organization that allows merchants around the world to process millions of daily credit card transactions. Due to the nature of their business, their IT team needed to strike the perfect balance between meeting regulatory-mandated data security measures with the lowest possible levels of latency and …

Most Popular Programming Stories

More for Developers

RSS Feeds

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