Hi Larry, Kevin, Eric and all others who replied to my plea
I just found out what the problem was. The problem was that I adopted
Apple's HIFramework as a starting point and I derived my db class
from TView. I forgot that TView installs a draw handler by default
and this handler does nothing unless you override it. All I had to do
is to remove the installation of this handler and everything was
drawn as expected. That's what you get when you are unfamiliar with
the default behavior of a given framework. That's why I'm not jumping
into the Cocoa bandwagon just yet. I want to port everything to
Carbon Mach-O first and then move to Cocoa incrementally if need be.
Thanks for all the nice people who were amiable enough to answer,
some of you in private. Your help is much appreciated.
JV
On 2007/11/03, at 04:31, Laurence Harris wrote:
On Nov 1, 2007, at 11:31 AM, João Varela wrote:
Hello List
I am debugging a project that I ported from CFM (which used
PowerPlant as a framework) to Mach-O (which is based on Apple's
HIFramework). I'm happy that I removed all the PP dependencies I
had, but there's a lot of weird GUI stuff going on.
For instance, all views based on the data browser do not draw; I
moved them to compositing windows; I can add columns and rows and
the scroll bars grow accordingly but the contents are not drawn,
and that includes the column headers (all I see is the gray
background moving up and down as I scroll down and up); is there
anything I must do in order for these now nib-based data browsers
to draw; I am NOT using any custom content, just plain vanilla
content with two checkbox columns, one date column and one icon-
text column.
BTW, I called HIViewSetVisible( view, true ) and
HIViewSetNeedsDisplay( view, true ) to no avail. The problem still
persists. Other controls are drawn as expected in the very same
windows.
Are your callbacks being to supply data? Do you have any clipping
code that could be clipping the DB? Any handlers installed on the
DB? I have several DataBrowsers defined in nib-based windows and
they "just work."
Larry
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