[Qt-interest] Basic update() paint - more info

[Phil]

On Monday 26 January 2009 15:54:39 Phil wrote:
> On Friday 23 January 2009 11:05:23 andrew.m.goth at l-3com.com wrote:
> > Phil wrote:
> > > Calling update() under QT3 used to work and reading the
> > > documentation hasn't helped. How do I now force a paintevent
> > > under QT4?
> >

After another restless night I now realise that it's not update() that's the 
problem, it's how I'm calling the class that contains the paint event and 
update(),

This is how I'm currently calling the Map class function from the base class:

  Map map(mapFrame);
  map.functionX();

Which actually works, however I now have a new instance of map (of course) 
each time functionX() is called, which is not want I want. So now I suspect 
that it boils down to a C++ question rather that specifically a QT question.

What I need is to include "Map map(mapFrame)" in my base class header file as 
an attribute so that I only have one instance of map. The problem is that this 
causes an error: "mapFrame is not a type". mapFrame is the name of the frame 
generated by and then promoted under Designer.

Neither

Map* map = new Map(mapFrame);
map->functionX();

nor 

Map map;
map.functionX();

will triger a new paint event. Only Map map(mapFrame) seems to work, at the 
moment. 

So, any help that leads to an answer will be greatly appreciated.

-- 
Regards,
Phil.