On Nov 28, 2008, at 11:23 PM, [EMAIL PROTECTED] wrote:
From: "Christian Graus" <[EMAIL PROTECTED]>
Subject: Still unable to work out mouse position
To: cocoa-dev@lists.apple.com
Message-ID:
<[EMAIL PROTECTED]>
Content-Type: text/plain; charset=ISO-8859-1
Thanks to the person who answered yesterday, but I am no closer to a
solution. I have an NSTableView, and it contains
NSTextAttachmentCell rows.
There's only one column in the table view. Basically, when a user
clicks
on a row, I am getting the shouldSelectRow event, which gives me a row
index. I need to know if the user clicked on the icon which is in
the first
16 pixels of the row. To do this, I want to either find out the mouse
position in general then normalise it to the control, or I want to
capture
mouse movement ( without any clicks ) and record it as I go, so I
know when
I click, what part of the cell was clicked on. I have found there's
an
event on a cell that would tell me the mouse position on a click,
but I
can't work out how to get the event, do I need to subclass
NSTextAttachment
and NSTextAttachmentCell to make my cell a new type that also tracks
the
mouse ? I get that impression from my reading, but surely I can just
subscribe to an event ? If I could just ask for the mouse position on
screen, and normalise it to my table view, that would solve all my
issues.
Thanks
christian
Christian, you might consider just adding a column that contains
NSButtonCell for each row.
With this , it will be a LOT easier to know that what you want users
to click on was clicked on.
This way, all you need to do is work on the appearance and not invent
any wheels. (just put new hubcaps on the wheels)
If all you need to know is if a button is clicked, use a button. In
IB, drag and drop your image on the buttoncell and you're done, other
than setting up notifications, actions or delegation.
If you really, really need a button of a specific shape and hitmask,
subclass NSButtonCell. (for this you'll want to read up on NSControl
and NSButton and test subclassing those first)
You don't need horizontal lines on the NSTableView, because you seem
to want the rows to be seamless.
You can still track the mouse location within any NSRect (within a
cell's rect relative to the column's rect) but you're going to have to
also keep track of the visible area if the view is resized and
scrollable.
Depending on what you're trying to do, and if you feel like bothering
with it, you may also want to consider NSMatrix, but it's a PITA.
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