On 2009 Aug 16, at 17:21, Graham Cox wrote:
I have an outline view using source list style.
When I right-click on the view, the item under the mouse highlights
with a blue outline independent of the current selection. This gives
the impression that the menu command applies to that item, not the
real selected item. In my case my menu commands pertain to the list
as a whole, and therefore the current normal selection, so I'd like
to turn off this additional highlight.
How? I couldn't find any means to do this, using a delegate method
or otherwise.
Once upon a time, I wrote a class which disabled highlighting of cells
which were not editable. However, I see that I'm not using it at this
time and recall that there were some issues with it. Here it is. The
comments and hyperlink references will definitely be more useful to
you than the code :)
#import <Cocoa/Cocoa.h>
/*!
@brief A subclass of NSTableView that does not highlight cells
which are not editable.
@details From: http://www.cocoabuilder.com/archive/message/cocoa/2006/6/1/164789
:
The "secret" is that you need to override the highlighting in two
places:
- The NSCell used in the table
- The NSTableView itself
I've done the second one, but I'm not sure how to do the first one
without
screwing up all the cells that I've set in Interface Builder.
With the code below, it works perfectly in Tiger but in Leopard the
first column of the clicked row is flashed in the highlight color
whenever you click
in a different column of that row. If I ever wanted to fix that,
and get
rid of the hacks, supposedly the
following method in all relevant NSCell subclasses would do it:
If I ever figure that out, this should be done in the NSCell subclass:
- (NSColor *)highlightColorWithFrame:(NSRect)cellFrame
inView:(NSView*)controlView {
return nil;
}
*/
@interface SSYSmartHiliTableView : NSTableView {
}
@end
#import "SSYSmartHiliTableView.h"
#import "NSColor+Tweak.h"
#import "NSView+ActiveControl.h"
/* Interesting References on this topic and related topics:
http://stoneship.org/journal/2005/using-a-nsoutlineview-as-a-source-list/
http://chanson.livejournal.com/176310.html
http://www.cocoadev.com/index.pl?IconAndTextInTableCell
http://mattgemmell.com/source
The blue-highlight color that NSTableView uses is this:
+ (NSColor *)alternateSelectedControlColor; // Similar to
selectedControlColor; for use in lists and tables
Note: for custom cells, you may want to simply return nil from this
method to avoid having the NSCell do any background highlight color
drawing:
- (NSColor *)highlightColorWithFrame:(NSRect)cellFrame inView:
(NSView *)controlView;
That only works in NSTableViews; it won't work with cells in
NSBrowsers, which actually rely on this method to draw the
highlighting (since it is a matrix of cells).
corbin
*/
@interface SmartHiliTextCell : NSTextFieldCell {
}
@end
@implementation SmartHiliTextCell
- (void)drawInteriorWithFrame:(NSRect)cellFrame
inView:(NSView *)controlView {
// Note: When a cell if "highlighted", this is the same as when its
// row or column are "selected". "Highlighted" <==> "Selected".
// ARGHHHH!!! I set the cell to be not editable below, in
awakeFromNib,
// but SOMETHING comes by and later sets it to be editable!!!!!!!!!
if(![self isHighlighted]) {
// Cell is not selected --> Let super draw text in black
[super drawInteriorWithFrame:cellFrame
inView:controlView] ;
}
else if ([self isEditable]) {
// Cell is selected and editable --> Draw text in white
NSRect inset = cellFrame;
inset.origin.x += 2;
NSDictionary* oldAttrs = [[self attributedStringValue]
attributesAtIndex:0
effectiveRange:NULL] ;
NSMutableDictionary* newAttrs = [oldAttrs mutableCopy] ;
[newAttrs setValue:[NSColor whiteColor]
forKey:@"NSColor"] ;
[[self stringValue] drawInRect:inset
withAttributes:newAttrs] ;
[newAttrs release] ;
}
else {
// Cell is selected but not editable --> Draw nothing
// The editable controls (popup button, date picker)
// will be drawn in our rect.
}
}
@end
@implementation SSYSmartHiliTableView
- (void)highlightSelectionInClipRect:(NSRect)clipRect {
int selectedRow = [self selectedRow];
if(selectedRow != -1) {
// A row is selected
[self lockFocus];
// Get the appropriate color for the selected row
NSColor* color ;
if([self isTheActiveControl]) {
color = [NSColor selectedTextBackgroundColor] ;
// This is what is set in System Preferences
// > Appearance > Highlight Color (for selected text)
color = [color colorTweakBrightness:-.20] ;
// The -.2 factor was determined by reverse-engineering:
// I set the color in System Preferences to RGB = {255,
0, 255},
// but when I use DigitalColor Meter.app on a highlighted
cell
// in a "stock" NSTableView, I measure {204, 0, 204}. Now,
// 204=51*4 and 255=51*5. So it looks like Apple decided
to
// reduce the brightness by 20%, because, of course, if
someone
// set their "highlight" (sic) color to all white, the
white text
// drawn on it by NSTextFieldCell would be invisible.
// Interestingly, in NSTextViews (TextEdit docs, message in
// Mail.app), the text is drawn in black instead of
white, and
// the 20% reduction is not applied.
}
else {
color = [NSColor secondarySelectedControlColor] ;
}
color = [color
colorUsingColorSpaceName:@"NSDeviceRGBColorSpace"] ;
NSRect rect = [self rectOfRow:selectedRow] ;
NSInteger i = 0 ;
for (NSTableColumn* column in [self tableColumns]) {
if ([column isEditable]) {
rect = NSIntersectionRect(rect, [self
rectOfColumn:i]) ;
}
i++ ;
}
if (
(rect.size.width > 0.0)
&&
(rect.size.height > 0.0)
) {
[[NSGraphicsContext currentContext]
setCompositingOperation:NSCompositeSourceOver] ;
[color set] ;
[NSBezierPath fillRect:rect] ;
}
[self unlockFocus] ;
}
}
- (void)awakeFromNib {
for (NSTableColumn* column in [self tableColumns]) {
if (![column isEditable]) {
NSFont* font = [[column dataCell] font] ;
NSCell* newCell = [[[SmartHiliTextCell alloc] init]
autorelease] ;
[newCell setFont:font] ;
[column setDataCell:newCell] ;
}
}
}
@end
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