Hi,
Am Montag, den 20.03.2006, 12:30 -0600 schrieb Jesus Reyes:
> ----- Original Message -----
> From: "A.J. Venter" <[EMAIL PROTECTED]>
> To: <[email protected]>
> Sent: Monday, March 20, 2006 2:12 AM
> Subject: [lazarus] gridview - scrolling
>
>
> > I received the following bug report from a beta tester today:
> > > 4)
> > > Pulling down the scrollbar in the main view doesn't actually *scroll* the
> > > list. Instead, the list remains as is and, when I release the mouse
> > > button,
> > > jumps to the position of the scrollbar. Very irritating. I would consider
> > > this not just an inconvenience but a bug.
> > >
>
> This is not but, it's a feature :)
> To change the way the grid reacts when dragging the scrollbar toggle
> goThumbTracking grid option
>
> > > 4a)
> > > If I use the arrows of the scrollbar instead and hold the mouse button
> > > down
> > > on the arrow, nothing happens. It seems, the repeat function isn't
> > > working.
> >
>
> Under gtk pressing the scrollbar arrows does one pixel position increment
> (I'm not sure if this can be changed), as you probably has thousands of rows
> every one at least 18 pixel height, you would have to press at least
> thousands*18 times in order to scroll the grid fully ;).
GtkObject* gtk_adjustment_new (gdouble value,
gdouble lower,
gdouble upper,
gdouble step_increment,
gdouble page_increment,
gdouble page_size);
Creates a new GtkAdjustment.
value :
the initial value.
lower :
the minimum value.
upper :
the maximum value.
step_increment :
the step increment.
page_increment :
the page increment.
page_size :
the page size.
Returns :
a new GtkAdjustment.
step increment is the scrollbar-arrow-increment...
cheers,
Danny
>
>
> > The main view he refers to is TDrawGrid any idea how I can fix it ?
> >
>
> for 4a, you probably need to make a T*DrawGrid derivated that handle the
> scrollbars in a different way, for example look at dbgrid on how to do that,
> specially tcustomdbgrid.UpdateScrollbarRange, in your case one pixel will
> probably mean one record, so clicking the scrollbar arrows will move one
> record.
>
>
> > Ciao
> > A.J.
> > --
> > "there's nothing as inspirational for a hacker as a cat obscuring a bug
> > by sitting in front of the monitor" - Boudewijn Rempt
> > A.J. Venter
> > Chief Software Architect
> > OpenLab International
> > www.getopenlab.com
> > www.silentcoder.co.za
> > +27 82 726 5103
> >
>
> Jesus Reyes A.
>
>
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