request: add index range property to styled text

[ghost]

Hi Tomas, Would it be possible to add an index range property to the styled text objects?
Maher

[TomasMikula]

Hi Maher,

thanks for asking, but this is not possible. The reason is that StyledTexts are moved around as text is inserted and deleted to and from text area. Imagine a text area with 1 million StyledTexts and insert one character at position 0. You would have to update all 1 million ranges. Another nice property about StyledTexts as they are is immutability. Immutability enables, for example, that the same StyledText instance can be in two different text areas at two different positions at the same time.

[ghost]

Thanks! What is immutability?
On Apr 10, 2014 2:10 PM, "TomasMikula" notifications@github.com wrote:

Hi Maher,

thanks for asking, but this is not possible. The reason is that
StyledTexts are moved around as text is inserted and deleted to and from
text area. Imagine a text area with 1 million StyledTexts and insert one
character at position 0. You would have to update all 1 million ranges.
Another nice property about StyledTexts as they are is immutability.

Reply to this email directly or view it on GitHubhttps://github.com//issues/33#issuecomment-40143340
.

[ghost]

Oh ok. Got it :)
Sorry ... Not sleeping.
On Apr 10, 2014 2:12 PM, "Maher Elkhaldi" m.s.khaldi@gmail.com wrote:

Thanks! What is immutability?
On Apr 10, 2014 2:10 PM, "TomasMikula" notifications@github.com wrote:

Hi Maher,

thanks for asking, but this is not possible. The reason is that
StyledTexts are moved around as text is inserted and deleted to and from
text area. Imagine a text area with 1 million StyledTexts and insert one
character at position 0. You would have to update all 1 million ranges.
Another nice property about StyledTexts as they are is immutability.

Reply to this email directly or view it on GitHubhttps://github.com//issues/33#issuecomment-40143340
.

[ghost]

Hi Tomas, I made a subclass of StyledText with range info, and a method to
update the the range info for these ranges. When invoking the method upon
typing into the text area, things get really slow as you said. Now I invoke
it only when a style is applied, which makes sense. The speed is almost the
same.

How about adding an index range property that only updates when it gets
called by the user? Is there such a thing?

On Thu, Apr 10, 2014 at 2:14 PM, Maher Elkhaldi m.s.khaldi@gmail.comwrote:

Oh ok. Got it :)
Sorry ... Not sleeping.
On Apr 10, 2014 2:12 PM, "Maher Elkhaldi" m.s.khaldi@gmail.com wrote:

Thanks! What is immutability?
On Apr 10, 2014 2:10 PM, "TomasMikula" notifications@github.com wrote:

Hi Maher,

thanks for asking, but this is not possible. The reason is that
StyledTexts are moved around as text is inserted and deleted to and from
text area. Imagine a text area with 1 million StyledTexts and insert one
character at position 0. You would have to update all 1 million ranges.
Another nice property about StyledTexts as they are is immutability.

Reply to this email directly or view it on GitHubhttps://github.com//issues/33#issuecomment-40143340
.

[TomasMikula]

Hi Maher,

I don't think it's a good idea for StyledText to know its position within text area. What is your use case? Maybe we can come up with an alternative solution.

[ghost]

Hi Tomas,
I ran into this when I tried to apply a size to a collection of styled
texts.

For example: Maher (in bold) and sami (in normal). These technically two
different styled texts.

Now i want to increase the size of "er sa". This requires that u get the
style for each styledtext and its range.

So i get the style from Maher, build a new one with a new size, then apply
it based in the selection.. Which starts at er.
And to make sure that I apply the style only to er not the whole selection.
I need to know where the styled text ends so that I do the same process for
sami, which has a different style base all together

To do that, I made a method that rebuilds a collection if all styled texts
with their ranges every time I apply a style-- change the segments in a
paragraph.

This way I can apply specific styling parameters to any selection in text
and update the specific property of each styletext segment correctly.

That was part of my question about how the data is structured and what
happens when I apply a style to a text. I figured since it splits a segment
into other segments.. Then I need to get the started and ends of each
segment when the structure changes..which is when a style is applied.

Might be over engineered as a solution. But I am not a programmer.. More
like a guy wrestling with java on a daily basis to make a prototype :D
On Apr 10, 2014 7:37 PM, "TomasMikula" notifications@github.com wrote:

Hi Maher,

I don't think it's a good idea for StyledText to know its position within
text area. What is your use case? Maybe we can come up with an alternative
solution.

Reply to this email directly or view it on GitHubhttps://github.com//issues/33#issuecomment-40165621
.

[TomasMikula]

You should do something like this:

IndexRange range = area.getSelection();
StyleSpans<String> styles = area.getStyleSpans(range);
StyleSpans<String> newStyles = styles.mapStyles(css -> css + "-fx-font-size: 32pt;");
area.setStyleSpans(range.getStart(), newStyles);

[ghost]

oh my God!
this is why you're you!

On Thu, Apr 10, 2014 at 8:08 PM, TomasMikula notifications@github.comwrote:

You should do something like this:

IndexRange range = area.getSelection();StyleSpans styles = area.getStyleSpans(range);StyleSpans newStyles = styles.mapStyles(css -> css + "-fx-font-size: 32pt;");area.setStyleSpans(range.getStart(), newStyles);

Reply to this email directly or view it on GitHubhttps://github.com//issues/33#issuecomment-40166953
.