Re: disabling tooltips table view
Re: disabling tooltips table view
- Subject: Re: disabling tooltips table view
- From: "Rick C." <email@hidden>
- Date: Tue, 18 Aug 2009 07:25:41 -0700 (PDT)
great thank you very much corbin!
________________________________
From: Corbin Dunn <email@hidden>
To: Rick C. <email@hidden>
Cc: Graham Cox <email@hidden>; cocoa dev <email@hidden>
Sent: Tuesday, August 18, 2009 10:05:19 PM
Subject: Re: disabling tooltips table view
On Aug 18, 2009, at 5:39 AM, Rick C. wrote:
> thank you graham,
>
> upon closer look i was in error to use the word tooltip. i have seen this method before and tried it again and it does work to change the tooltip or disable it. what i'm seeing must be some form of highlighting. although i have disabled the standard highlighting where when you click the rows it highlights. this is not my issue. it seems the rows that are truncated with a tail are the ones that highlight when i hover my mouse over the row. on a row that is not truncated it does not highlight. i have coded into my custom cell setLineBreakMode:NSLineBreakByTruncatingTail. Maybe the issue lies somewhere here?
>
> edited: I just discovered this method:
>
> - (NSRect)expansionFrameWithFrame:(NSRect)cellFrame inView:(NSView *)view
>
> and returned NSZeroRect and seems that does the job. Assuming it does thank you for your help you did get me on the right track!
What you are seeing is called an "expansion tool tip". (they aren't highlighting -- that is confusing term to use for them).
It is documented in our release notes:
http://developer.apple.com/releasenotes/Cocoa/AppKit.html
NSCell Automatic Expansion ToolTip Frame
> NSCell has some new API to support expansion tool tips in certain controls:
> - (NSRect)expansionFrameWithFrame:(NSRect)cellFrame inView:(NSView *)view;
> - (void)drawWithExpansionFrame:(NSRect)cellFrame inView:(NSView *)view;
> An expansion tool tip allows one to see truncated text in a special floating window that is similar but different from a normal ToolTip. Currently, NSTableView, NSOutlineView and NSBrowser display expansion tool tips when the text is truncated. If you have a cell that will be displayed in one of these controls, it is recommended that you implement the above methods to properly support the expansion tool tip feature. By default, the methods are properly implemented in NSTextFieldCell and NSBrowserCell. NSCell will always return NSZeroRect, and prevent the expansion from happening. For an example of how to implement it, see the SimpleBrowser demo app.
>
> Clients of NSTableView, NSOutlineView and NSBrowser can prevent the cell expansion from happening on a particular row/column by using the new delegate methods declared in the appropriate header files.
>
>
Your work around is one way to turn them off; however, it is much easier to use this method:
>
> /* Optional - Expansion ToolTip support
> Implement this method and return NO to prevent an expansion tooltip from appearing for a particular cell in a given row and tableColumn. See NSCell.h for more information on expansion tool tips.
> */
> - (BOOL)tableView:(NSTableView *)tableView shouldShowCellExpansionForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row AVAILABLE_MAC_OS_X_VERSION_10_5_AND_LATER;
>
corbin
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