Re: Highlight Text like with FIne
Re: Highlight Text like with FIne
- Subject: Re: Highlight Text like with FIne
- From: Brad Stone <email@hidden>
- Date: Tue, 7 Sep 2010 11:54:01 -0400
Ross - That looks like a good solution, basically, I'm highlighting the background versus the actual text. Very clever. This approach has the added advantage of preventing the user from accidentally deleting text because it's not a real highligh. I'll try this out tonight.
Using this code I was able to highlight text in an textView but again, it's highlighting the text, not the background:
NSString *s = [textView string];
NSMutableArray *selRangeArray = [[NSMutableArray alloc] init];
if ([s length] > 0) {
NSRange r = [s rangeOfString:searchText options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
while (r.location != NSNotFound) {
[selRangeArray addObject:[NSValue valueWithRange:r]];
NSUInteger newStart = r.location + r.length;
r = [s rangeOfString:searchText options:NSCaseInsensitiveSearch range:NSMakeRange(newStart, [s length] - newStart)];
}
if ([selRangeArray count] > 0) {
[textView setSelectedRanges:selRangeArray];
}
}
On Sep 6, 2010, at 1:19 PM, Ross Carter wrote:
> On Sep 5, 2010, at 7:33 PM, Brad Stone wrote:
>
>> I want to highlight different substrings contained in controls in a window (two different comboBoxes for example) programmatically when the user is searching for a subString. I can do this for one comboBox but not both simultaneously. Here's one.
>>
>> NSString *s = [titleComboBox stringValue];
>> NSRange r = [s rangeOfString:searchText options:NSCaseInsensitiveSearch range:NSMakeRange(0, [s length])];
>> [titleComboBox selectText:w];
>> if (r.location != NSNotFound) {
>> // this is needed to select the substring
>> NSText *textEditor = [w fieldEditor:YES forObject:titleComboBox];
>> [textEditor setSelectedRange:r];
>> }
>>
>> But this only highlights the text in the titleComboBox. If I then repeat this to highlight the text in the categoryComboBox by repeating the code, titleComboBox gets deselected and categoryComboBox gets selected. I want to highlight them both simultaneously. I'd also rather use the big yellow highlight like with the find panel (but that's later).
>>
>> Is this possible?
>
> Your code will not work because there can be only one active field editor at a time, and you are controlling the text by manipulating the selectedRange property of the field editor.
>
> I would be inclined to try using attributed strings to show the selection. Maybe something like this:
>
> if (r.location != NSNotFound) {
> NSMutableAttributedString *stringWithSelection = [[NSMutableAttributedString alloc] initWithString:s];
> [stringWithSelection addAttribute: NSBackgroundColorAttributeName value:[NSColor yellowColor] range:r];
> // set control value to stringWithSelection, using whatever technique is appropriate
> [stringWithSelection release];
> }
>
> To deselect, just set the control value to [[control attributedStringValue] string].
>
> There are other ways to do what you need. This might be the most straightforward.
>
> -Ross
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