I am on Xcode 10, Objective-C, macOS NOT iOS.
Is it possible to programmatically select a line in NSTextView if the line number is given? Not by changing any of the attributes of the content, just select it as a user would do it by triple clicking.
I know how to get selected text by its range but this time i need to select text programmatically.
I've found selectLine:(id) but it seems to be for an insertion point.
A pointer to the right direction would be great and very much appreciated.
The Apple documentation here https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/TextLayout/Tasks/CountLines.html should be useful for what you're attempting to do.
In their example of counting lines of wrapped text they use the NSLayoutManager method lineFragmentRectForGlyphAtIndex:effectiveRange https://developer.apple.com/documentation/appkit/nslayoutmanager/1403140-linefragmentrectforglyphatindex to find the effective range of the line, then increase the counting index to the end of that range (i.e. starting at the next line). With some minor modification, you can use it to find the range of the line you'd like to select, then use NSTextView's setSelectedRange: to select it.
Here's it modified to where I believe it would probably work for what you're attempting to accomplish:
- (void)selectLineNumber:(NSUInteger)lineNumberToSelect {
NSLayoutManager *layoutManager = [self.testTextView layoutManager];
NSUInteger numberOfLines = 0;
NSUInteger numberOfGlyphs = [layoutManager numberOfGlyphs];
NSRange lineRange;
for (NSUInteger indexOfGlyph = 0; indexOfGlyph < numberOfGlyphs; numberOfLines++) {
[layoutManager lineFragmentRectForGlyphAtIndex:indexOfGlyph effectiveRange:&lineRange];
// check if we've found our line number
if (numberOfLines == lineNumberToSelect) {
[[NSOperationQueue mainQueue] addOperationWithBlock:^{
[self.testTextView setSelectedRange:lineRange];
}];
break;
}
indexOfGlyph = NSMaxRange(lineRange);
}
}
Then you could call it with something like:
[self selectLineNumber:3];
Keep in mind that we're starting at index 0. If you pass in a lineNumberToSelect that is greater than the numberOfLines, it should just be a no-op and the selection should remain where it is.
Thanks #R4N! Your answer helped me figure out how jump to specific line with NSTextView. I converted your Obj-C to Swift 5:
func selectLineNumber(lineNumberToJumpTo: Int) {
let layoutManager = textView.layoutManager!
var numberOfLines = 1
let numberOfGlyphs = layoutManager.numberOfGlyphs
var lineRange: NSRange = NSRange()
var indexOfGlyph = 0
while indexOfGlyph < numberOfGlyphs {
layoutManager.lineFragmentRect(forGlyphAt: indexOfGlyph, effectiveRange: &lineRange, withoutAdditionalLayout: false)
// check if we've found our line number
if numberOfLines == lineNumberToJumpTo {
textView.selectedRange = lineRange
textView.scrollRangeToVisible(lineRange)
break
}
indexOfGlyph = NSMaxRange(lineRange)
numberOfLines += 1
}
}
I want to get the most recent word entered by the user from the UITextView.
The user can enter a word anywhere in the UITextView, in the middle or in the end or in the beginning. I would consider it a word when the user finishes typing it and presses a space and does any corrections using the "Suggestions from the UIMenuController".
Example: User types in "kimd" in the UITextView somewhere in the middle of text, he gets a popup for autocorrection "kind" which he does. After he does that, I want to capture "kind" and use it in my application.
I searched a lot on the internet but found solutions that talk about when the user enters text in the end. I also tried detecting a space and then doing a backward search until another space after some text is found, so that i can qualify it as a word. But I think there may be better ways to do this.
I have read somewhere that iOS caches the recent text that we enter in a text field or text view. If I can pop off the top one , that's all I want. I just need handle to that object.
I would really appreciate the help.
Note: The user can enter text anywhere in UItextview. I need the most recent entered word
Thanks.
//This method looks for the recent string entered by user and then takes appropriate action.
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {
//Look for Space or any specific string such as a space
if ([text isEqualToString:#" "]) {
NSMutableCharacterSet *workingSet = [[NSCharacterSet whitespaceAndNewlineCharacterSet] mutableCopy];
NSRange newRange = [self.myTextView.text rangeOfCharacterFromSet:workingSet
options:NSBackwardsSearch
range:NSMakeRange(0, (currentLocation - 1))];
//The below code could be done in a better way...
UITextPosition *beginning = myTextView.beginningOfDocument;
UITextPosition *start = [myTextView positionFromPosition:beginning offset:currentLocation];
UITextPosition *end = [myTextView positionFromPosition:beginning offset:newRangeLocation+1];
UITextRange *textRange = [myTextView textRangeFromPosition:end toPosition:start];
NSString* str = [self.myTextView textInRange:textRange];
}
}
Here is what I would suggest doing, might seem a little hacky but it would work just fine:
First in .h conform to the UITextViewDelegate and set your text view's delegate to self like this:
myTextView.delegate = self;
and use this code:
- (void)textViewDidChange:(UITextView *)textView { // Delegate method called when any text is modified
if ([textView.text substringFromIndex: [textView.text length] - 1]) { // Gets last character of the text view's text
NSArray *allWords = [[textView text] componentsSeparatedByString: #" "]; // Gets the text view's text and fills an array with all strings seperated by a space in text view's text, basically all the words
NSString *mostRecentWord = [allWords lastObject]; // The most recent word!
}
}
I use this code to get the word behind the #-sign:
- (void)textViewDidChange:(UITextView *)textView {
NSRange rangeOfLastInsertedCharacter = textView.selectedRange;
rangeOfLastInsertedCharacter.location = MAX(rangeOfLastInsertedCharacter.location - 1,0);
rangeOfLastInsertedCharacter.length = 1;
NSString *lastInsertedSubstring;
NSString *mentionSubString;
if (![textView.text isEqualToString:#""]) {
lastInsertedSubstring = [textView.text substringWithRange:rangeOfLastInsertedCharacter];
if (self.startOfMention > 0 || self.startOfHashtag > 0) {
if ([lastInsertedSubstring isEqualToString:#" "] || (self.startOfMention > textView.selectedRange.location || self.startOfHashtag > textView.selectedRange.location)) {
self.startOfMention = 0;
self.lenthOfMentionSubstring = 0;
}
}
if (self.startOfMention > 0) {
self.lenthOfMentionSubstring = textView.selectedRange.location - self.startOfMention;
NSRange rangeOfMentionSubstring = {self.startOfMention, textView.selectedRange.location - self.startOfMention};
mentionSubString = [textView.text substringWithRange:rangeOfMentionSubstring];
dhDebug(#"mentionSubString: %#", mentionSubString);
UIAccessibilityPostNotification(UIAccessibilityLayoutChangedNotification, nil);
}
}
}
Simple extension for UITextView:
extension UITextView {
func editedWord() -> String {
let cursorPosition = selectedRange.location
let separationCharacters = NSCharacterSet(charactersInString: " ")
let beginRange = Range(start: text.startIndex.advancedBy(0), end: text.startIndex.advancedBy(cursorPosition))
let endRange = Range(start: text.startIndex.advancedBy(cursorPosition), end: text.startIndex.advancedBy(text.characters.count))
let beginPhrase = text.substringWithRange(beginRange)
let endPhrase = text.substringWithRange(endRange)
let beginWords = beginPhrase.componentsSeparatedByCharactersInSet(separationCharacters)
let endWords = endPhrase.componentsSeparatedByCharactersInSet(separationCharacters)
return beginWords.last! + endWords.first!
}
}
I have a UITextField, how can I change the cursor position dynamically based of some condition to a particular length?
Use textview.selectedRange.
NSRange selection = [textview.text rangeOfString:#"SomeText" options:NSCaseInsensitiveSearch];
if( selection.location != NSNotFound ){
textview.selectedRange = selection;
textview.selectedRange = NSMakeRange(selection.location, 0);
}
It may helps you
Use this link maybe it will help you solve your issue. Hope it is of use !! :)
Change cursor in UITextField when set new text
and also Finding the cursor position in a UITextField
// Get the selected text range
UITextRange *selectedRange = [self selectedTextRange];
// Calculate the existing position, relative to the end of the field (will be a - number)
int pos = [self offsetFromPosition:self.endOfDocument toPosition:selectedRange.start];
// Change the text
self.text = lastValidated;
// Work out the position based by offsetting the end of the field to the same
// offset we had before editing
UITextPosition *newPos = [self positionFromPosition:self.endOfDocument offset:pos];
// Reselect the range, to move the cursor to that position
self.selectedTextRange = [self textRangeFromPosition:newPos toPosition:newPos];
Happy coding....
I have a NSTableView that shows the path of files in one column. When the user resizes the tableview I want the pathname (e.g. /Users/name/testfile.m) to be resized, but I want the end of the pathname (e.g. ...name/testfile.m) to be visible and not the start (e.g. /Users/test/te...) of the path as happens by default. I wrote a function that successfully does what I want to do, but the tableview flickers while redrawing as the user scales the tableview. I think there must be a better, more elegant algorithm for doing this, but I have looked into the documentation for NSString and on Stackoverflow and I cant find anything that gives a better solution. If anyone has a more elegant solution to this problem that would be greatly appreciated. Thanks! Cheers, Trond
My current function:
-(NSString *) truncateString:(NSString *) myString withFontSize:(int) myFontSize withMaxWidth:(NSInteger) maxWidth
{
// Get the width of the current string for a given font
NSFont *font = [NSFont systemFontOfSize:myFontSize];
CGSize textSize = NSSizeToCGSize([myString sizeWithAttributes:[NSDictionary dictionaryWithObject:font forKey: NSFontAttributeName]]);
NSInteger lenURL =(int)textSize.width;
// Prepare for new truncated string
NSString *myStringShort;
NSMutableString *truncatedString = [[myString mutableCopy] autorelease];
// If the available width is smaller than the string, start truncating from first character
if (lenURL > maxWidth)
{
// Get range for first character in string
NSRange range = {0, 1};
while ([truncatedString sizeWithAttributes:[NSDictionary dictionaryWithObject:font forKey: NSFontAttributeName]].width > MAX(TKstringPad,maxWidth))
{
// Delete character at start of string
[truncatedString deleteCharactersInRange:range];
}
myStringShort = [NSString stringWithFormat:#"...%#",truncatedString];
}
else
{
myStringShort=myString;
}
return myStringShort;
}
The typical approach would be simply:
[tableViewCell setLineBreakMode:NSLineBreakByTruncatingHead];
As Dondragmer noted, this property may also be set in Xcode's NIB editor.
Any way to have a NSButton title to wrap when it's width is longer than the button width, instead of getting clipped?
I'm trying to have a radio button with a text that can be long and have multiple lines. One way I thought about having it work is to have an NSButton of type NSRadioButton but can't get multiple lines of text to work.
Maybe my best alternative is to have an NSButton followed by an NSTextView with the mouseDown delegate function on it triggering the NSButton state?
I don't believe you can. You'd have to subclass NSButtonCell to add support for this.
That said, it's typically a bad idea to have multiple lines of text on a button. A button label should concisely represent the action performed:
The label on a push button should be a verb or verb phrase that describes the action it performs—Save, Close, Print, Delete, Change Password, and so on. If a push button acts on a single setting, label the button as specifically as possible; “Choose Picture…,” for example, is more helpful than “Choose…” Because buttons initiate an immediate action, it shouldn’t be necessary to use “now” (Scan Now, for example) in the label.
What are you trying to do?
I`m incredibly late, but I still feel obliged to share what I`ve found.
Just add a newline character before and after the button title before you assign it to the actual button — and voilà! It now wraps automatically.
The downside of this approach is that, for reasons unknown to me, apps compiled on a certain version of OS X shift button titles one line down when run on newer versions.
Well here's my excuse for needing multiline buttons: I'm writing an emulator for an IBM 701, complete with front panel, and, bless their hearts, the designers of that front panel used multi-line labels. Here's my code. You only have to subclass NSButtonCell (not NSButton), and only one method needs to be overridden.
// In Xcode 4.6 (don't know about earlier versions): Place NSButton, then double-click it
// and change class NSButtonCell to ButtonMultiLineCell.
#interface ButtonMultiLineCell : NSButtonCell
#end
#implementation ButtonMultiLineCell
- (NSRect)drawTitle:(NSAttributedString *)title withFrame:(NSRect)frame inView:(NSView *)controlView
{
NSAttributedString *as = [[NSAttributedString alloc] initWithString:[title.string stringByReplacingOccurrencesOfString:#" " withString:#"\n"]];
NSFont *sysFont = [NSFont systemFontOfSize:10];
NSMutableParagraphStyle *paragraphStyle = [[[NSParagraphStyle defaultParagraphStyle] mutableCopy] autorelease];
[paragraphStyle setAlignment:NSCenterTextAlignment];
NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:
sysFont, NSFontAttributeName,
paragraphStyle, NSParagraphStyleAttributeName,
nil];
NSSize textSize = [as.string sizeWithAttributes:attributes];
NSRect textBounds = NSMakeRect(0, 0, textSize.width, textSize.height);
// using frame argument seems to produce text in wrong place
NSRect f = NSMakeRect(0, (controlView.frame.size.height - textSize.height) / 2, controlView.frame.size.width, textSize.height);
[as.string drawInRect:f withAttributes:attributes];
return textBounds; // not sure what rectangle to return or what is done with it
}
#end
Even later, but I also feel obliged to share. You can set the attributedTitle property of NSButton to achieve manual wrapping.
In my case, I wanted the button title to wrap if it was greater than 6 characters (Swift 3):
if button.title.characters.count > 6 {
var wrappedTitle = button.title
wrappedTitle.insert("\n", at: wrappedTitle.index(wrappedTitle.startIndex, offsetBy: 6))
let style = NSMutableParagraphStyle()
style.alignment = .center
let attributes = [NSFontAttributeName: NSFont.systemFont(ofSize: 19), NSParagraphStyleAttributeName: style] as [String : Any]
button.attributedTitle = NSAttributedString(string: wrappedTitle, attributes: attributes)
}
I'm with Sören; If you need a longer description, think about using a tool tip or placing descriptive text in a wrapped text field using the small system font below the radio choices if the descriptive text is only a few lines. Otherwise, you could provide more information in a help document.
Figuring out a way to say what you need to say in a concise way is your best bet, though.
As of today, I'm seeing this can be done simply with a property on the cell of NSButton:
myButton.cell?.wraps = true
I had the same problem and tried, with a sinking heart, the solutions in this post. (While I appreciate advice that one generally should keep button titles short, I'm writing a game, and I want multi-line answers to behave like buttons).
Sometimes, you don't get there from here. My ideal was an NSButton with a multi-line label, but since I can't get that without considerable hassle, I have created a PseudoButton: an NSControl subclass that behaves like a button. It has a hand cursor to indicate 'you can click here' and it gives feedback: when you click the mouse, it changes to selectedControlColor, when you release the mouse, it returns to normal. And unlike solutions that try to stack buttons and labels, there is no problem with having labels and images on top of the view: the whole of the view is the clickable area.
import Cocoa
#IBDesignable
class PseudoButton: NSControl {
#IBInspectable var backgroundColor: NSColor = NSColor.white{
didSet{
self.needsDisplay = true
}
}
override func draw(_ dirtyRect: NSRect) {
super.draw(dirtyRect)
let path = NSBezierPath(rect: dirtyRect)
backgroundColor.setFill()
path.fill()
NSColor.black.setStroke()
path.lineWidth = 2
path.stroke()
}
override func mouseDown(with event: NSEvent) {
self.backgroundColor = NSColor.selectedControlColor
}
override func mouseUp(with event: NSEvent) {
self.backgroundColor = NSColor.clear
guard let action = action else {return}
tryToPerform(action, with: self)
//#IBAction func pseudobuttonClicked(_ sender: PseudoButton) in the ViewController class
}
override func resetCursorRects() {
addCursorRect(bounds, cursor: .pointingHand)
}
}
You use this like any other control in the storyboard: drag a Pseudobutton in, decorate it at will, and connect it to an appropriate IBAction in your viewController class.
I like this better than meddling with NSCell. (On past experience, NSCell-based hacks are more likely to break).
A little bit late here, here's my code to insert new line in title:
private func calculateMultipleLineTitle(_ title: String) -> String {
guard !title.isEmpty else { return title }
guard let cell = cell as? NSButtonCell else { return title }
let titleRect = cell.titleRect(forBounds: bounds)
let attr = attributedTitle.attributes(at: 0, effectiveRange: nil)
let indent = (attr[.paragraphStyle] as? NSMutableParagraphStyle)?.firstLineHeadIndent ?? 0
let titleTokenArray = title.components(separatedBy: " ") // word wrap break mode
guard !titleTokenArray.isEmpty else { return title }
var multipleLineTitle = titleTokenArray[0]
var multipleLineAttrTitle = NSMutableAttributedString(string: multipleLineTitle, attributes: attr)
var index = 1
while index < titleTokenArray.count {
multipleLineAttrTitle = NSMutableAttributedString(
string: multipleLineTitle + " " + titleTokenArray[index],
attributes: attr
)
if titleRect.minX+indent+multipleLineAttrTitle.size().width > bounds.width {
multipleLineTitle += " \n" + titleTokenArray[index]
} else {
multipleLineTitle += " " + titleTokenArray[index]
}
index += 1
}
return multipleLineTitle
}
Just pass the original title as parameter, it will return multiple line title.
I added an "\n" at the end of the title and I am setting the title using the NSAttributedString. this fixed the problem for me.
I am on MacOS Big Sur 11.7.2, Xcode 13.12.1
private NSAttributedString GetAttributedString(string text)
{
var paragraph = new NSMutableParagraphStyle();
paragraph.Alignment = NSTextAlignment.Center;
paragraph.LineBreakMode = NSLineBreakMode.ByWordWrapping;
var attrString = new NSAttributedString
(
text + "\n",
font: NSFont.FromFontName("Arial", 50.0f),
foregroundColor: NSColor.White,
backgroundColor: NSColor.FromCalibratedRgba(0, 0, 0, 0.0f),
paragraphStyle: paragraph
);
return attrString;
}
textButton.AttributedTitle = GetAttributedString("some text");