Re: Handling keyDown events
Re: Handling keyDown events
- Subject: Re: Handling keyDown events
- From: Aki Inoue <email@hidden>
- Date: Fri, 5 May 2006 14:12:46 -0700
You can create an object implementing NSControl delegate method, -
control:textView:doCommandBySelector:, and set it as the search field
delegate.
You can look for moveUp: and moveDown: selectors and change the table
view selection accordingly (you can follow Cocoa standard key binding
this way).
Btw: I also need to assign to a button the key equivalent CMD-
SpaceBar (yes, it's odd!!). But IB don't let me do this.
It's very likely you never see cmd+space events in your event queue.
It's used by Spotlight and/or keyboard management.
Aki
If you want to modify the behavior of the arrow keys for the
entire window, regardless of which control is active within, my
first recommendation would be to not do so as you are invariably
going to end up with a UI that works differently than every other
Cocoa app on the system.
However, if my guess as to your intentions is wrong -- quite
likely given that I have no idea what you are actually trying to
achieve -- then you will need to capture the events before they
hit the responder chain.
I have a search field and a table (containing search results). I
need that when the user press arrow down (in the s.field) the first
row in the table gets selected. I know that this makes the
interface behaviour non-standard but I just have to do that.
(Standard behaviour require the the user press tab selecting the
table and then arrow-down).
What is the key view when you are typing? Is the cursor blinking
in a field? If so, then the field is the first responder and is
accepting key events.
Yes, it is. So I need to subclass the NSSearchField and override
keyDown?
Or should I find I way (studying the Cocoa Events Overview
documentation) to catch the keyDown event at the beginning of the
responder chain?
I thought that the window was the first object asked to respond
events and, if the window doesn't respond then the event is passed
to the window's subviews. That's why I subclassed NSWindow.
Btw: I also need to assign to a button the key equivalent CMD-
SpaceBar (yes, it's odd!!). But IB don't let me do this.
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