I want to display tooltips over parts of an attributed string, and thought that using an NSToolTipAttributeName attribute on the required ranges would do the trick but I can't get it to work.
I am trying in MACOS, Xcode (9.2)
NSString *fullString = #"Create a new tooltip";
NSString *compareString =#"tooltip";
NSRange tooltipRange = [fullString rangeOfString: compareString];
[senderTextView.textStorage addAttribute:NSToolTipAttributeName
value:#"Custom tooltip"
range:tooltipRange];
[senderTextView.textStorage addAttribute:NSForegroundColorAttributeName
value:[NSColor redColor] range:tooltipRange];
The word "tooltip" is shown in red as expected, but no tooltip appears when I hover over it. What am I missing?
Couple of ways to do this, using the NSToolTipAttributeName in combination with NSLinkAttributeName, e.g.:
NSMutableDictionary* labelAttributes = [NSMutableDictionary new];
labelAttributes[NSToolTipAttributeName] = #"Tooltip";
labelAttributes[NSLinkAttributeName] = #"Link";
NSAttributedString* labelString = [NSAttributedString
attributedString:#"Display"]
withAttributes:labelAttributes];
Being careful not to forget displaysLinkToolTips = YES on the NSTextView.
Alternately, you can use the NSView Tooltips API, which provides:
- (NSToolTipTag)addToolTipRect:(NSRect)rect owner:(id)owner userData:(void *)data;
Related
I would like to display a two-line NSAttributedString as the button title of the NSStatusItem of my macOS app.
However, it seems to move the text up a few pixels and, thus, cut it off. This problem did not occur before macOS Big Sur.
Workaround
With some effort I managed to generate an NSImage of the text and use it as the button's image.
Question
Is there any way to position the NSAttributedString correctly without using an image?
I found a way to workaround this problem, but I don’t know if this way is correct, the code with Objetive-C is as follows
NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init];
CGFloat minMaxLineHeight = (font.pointSize - font.ascender + font.capHeight);
[style setMinimumLineHeight:minMaxLineHeight];
[style setMaximumLineHeight:minMaxLineHeight];
NSRange range = NSMakeRange(0, text.length);
[attriString addAttribute:NSParagraphStyleAttributeName
value:style
range:range];
[attriString addAttribute:NSBaselineOffsetAttributeName
value:#(-3.5)
range:range];
On a NSTextField I'm setting a custom font with a size of 140. The text is set to #"28". But as you can clearly see on the image, the text field has plenty of space on top. This only happens with certain type of fonts, not all of them. My question is what information from the font could be affecting the textfield that ends up cropping the text ? (Ascender, Cap Height ?). And if so, can I modify the font file to fix it ?
The baseline will vary between fonts. In addition, there are other metrics that vary. You can work around this problem with NSAttributedString. You could try varying the NSBaselineOffsetAttribute and from within a paragraph setMinimumLineHeight and setMaximumLineHeight. The following is an example. Make sure to create two textField labels and connect their outlets.
self.Label1.stringValue = #"Test Text";
//
// baseline is different for each font!
//
//self.Label2.stringValue = #"Test Text";
NSFont *otherFont = [NSFont fontWithName:#"MarkerFelt-Thin" size:40.0f];
NSNumber *baseline = [[NSNumber alloc] initWithFloat: 5.0f];
NSMutableParagraphStyle *paraStyle = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
[paraStyle setParagraphSpacingBefore:20.0f];
[paraStyle setMinimumLineHeight:30.0f];
[paraStyle setMaximumLineHeight:50.0f];
NSDictionary *otherFDict = [NSDictionary dictionaryWithObjectsAndKeys: paraStyle, NSParagraphStyleAttributeName,
otherFont, NSFontAttributeName, baseline, NSBaselineOffsetAttributeName, nil];
NSMutableAttributedString *otherText = [[NSMutableAttributedString alloc] initWithString:#"Test Text" attributes:otherFDict];
self.Label2.attributedStringValue = otherText;
I want to change the color of specific text in NSTextView. The method should check that after a keydown event.
For example: the word void is finished and the string void changes the
color to blue. Like a code editor.
I searched for a long time but don't find anything.
My Code:
NSRange range = [text rangeOfString:#"void"];
NSString *substring = [[text substringFromIndex:NSMaxRange(range)] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
//I think, here is the mistake.
NSAttributedString *now = [NSAttributedString initWithString:substring];
[now setTextColor:[[NSColor blueColor]]];
I have read that i have to use a NSAttributedString but i don't know how I can get this class from a string.
I'am quite new in cocoa programming.
Thanks for every help!
You can do this way:
NSString *str = #"Hello. That is a test attributed string.";
//in place of NSMakeRange put your range
[self.textview setRichText:YES];
[self.textview setString:str];
[self.textview setTextColor:[NSColor redColor] range:NSMakeRange(3,5)];
I've got an Label (NSTextField) in IB that's bound to a controller.
The controller, on awakeFromNIB, sets the attributedStringValue of the label to contain some coloured text and a link or two.
When you see the label it contains the correct string value, but some of the formatting is lost - until you click on the label, and it updates to contain the correct formatting.
I'm using this code to set the value:
[self.testTextField setAllowsEditingTextAttributes:YES];
[self.testTextField setSelectable:YES];
NSMutableAttributedString *linkString = [[NSMutableAttributedString alloc] initWithString:#"hit this "];
[linkString beginEditing];
NSMutableAttributedString* attrString = [[NSMutableAttributedString alloc] initWithString:#"link"];
NSRange range = NSMakeRange(0, [attrString length]);
[attrString addAttribute:NSLinkAttributeName value:[[NSURL URLWithString:#"http://google.com"] absoluteString] range:range];
[attrString addAttribute:NSUnderlineStyleAttributeName value:[NSNumber numberWithInt:NSUnderlinePatternDot] range:range];
[attrString addAttribute:NSForegroundColorAttributeName value:[NSColor blackColor] range:range];
[linkString appendAttributedString:attrString];
[linkString appendAttributedString:[[NSAttributedString alloc] initWithString:#" to search"]];
[linkString addAttribute:NSForegroundColorAttributeName value:[NSColor redColor] range:NSMakeRange(0, [linkString length])];
[linkString endEditing];
[self.testTextField setAttributedStringValue:linkString];
Based on this example, you'll see the string coloured red and in the default Label font.
Then when you click on the label the font changes size and face and the link magically renders.
Any ideas on how to get the string to render correctly the first time?
I ran into this same problem. The solution I found was to explicitly set the NSFontAttributeName on the attributed string. I created an NSFont object that matched the font I had set in IB for my textfield and set that attribute like so:
NSFont *font = [NSFont fontWithName:#"Lucida Grande" size:(CGFloat)13.0];
[attrString addAttribute:NSFontAttributeName value:font range:range];
As far as I know that's just normal AppKit weirdness.
I've had success using this custom class to render text fields as links, you just add it in interface builder and set its attributed string value like normal:
DSClickableURLTextField / Swift DSClickableURLTextField fork.
You also have the option of using an NSButton, though that's more of a pain, and you don't get the hand cursor without extra work.
I'm not sure what I'm doing wrong. I have a NSTextView and am registered as the delegate for its textStorage attribute. When I receive -textStorageDidProcessEditing:notification: I'm trying to apply attributes to ranges of characters within the text. It certainly does "something" to the characters, but not what I expect... they just disappear!
A heavily distilled code example. This should make sure the second character in the text field is always red:
-(void)textStorageDidProcessEditing:(NSNotification *)notification {
NSTextStorage *textStorage = [textView textStorage];
if ([[textStorage string] length] > 1) {
NSColor *color = [NSColor redColor];
NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:color, NSForegroundColorAttributeName, nil];
[textStorage setAttributes:attributes range:NSMakeRange(1, 1)];
}
}
Instead, as I type the sequence "abcdefg" I get "a", then when I hit "b" seemingly nothing happens, then when I hit "cdefg" typing occurs as normal, making the end result "acdefg"... the "b" is missing!
If I start hitting backspace I have to hit backspace 7 times, as if the "b" is actually there, but just not being drawn (cursor stalls as it deletes the "b", then on the next backspace deletes the "a" as expected).
If I apply attributes to some default text in the view using the same -setAttributes:range: method before the view is drawn then it does exactly as I expect.
Any clues? It seems like a fairly normal use of a NSTextStorageDelegate :)
I've tried calling -setNeedsDisplay on the text field to no avail.
Figured it out. Using NSTextStorage's -addAttribute:value:range works. I still don't fully understand why but at least I can get over it and move on.
-(void)textStorageDidProcessEditing:(NSNotification *)notification {
// ... SNIP ...
[textStorage addAttribute:NSForegroundColorAttributeName
value:[NSColor redColor]
range:NSMakeRange(1, 1)];
}
Makes the code a bit less cluttered too.
I'm not sure how relevant this is for you after so many years but I think the reason for it was that you were setting attributes with a dictionary which does not contain NSFontAttributeName, effectively removing it from the textview.
So I think this should work:
-(void)textStorageDidProcessEditing:(NSNotification *)notification {
NSTextStorage *textStorage = [textView textStorage];
if ([[textStorage string] length] > 1) {
NSColor *color = [NSColor redColor];
NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:color, NSForegroundColorAttributeName, [NSFont ...whatever...], NSFontAttributeName, nil];
[textStorage setAttributes:attributes range:NSMakeRange(1, 1)];
}
}