digitalmars.D.learn - Using CSS Data from Within My Code

Ron Tarrant (9/17) Sep 12 2019 But when I try to use it, I get the following errors:

Max Samukha (4/21) Sep 12 2019 q{} is a string that must only contain valid D tokens. D lexer
Andrea Fontana (3/20) Sep 12 2019 They are named "token string" and contained code must be a valid

Ron Tarrant (24/51) Sep 12 2019 Thanks, Andrea and Max.

Ron Tarrant (17/52) Sep 12 2019 That should have been:

Mike Parker (6/7) Sep 12 2019 enum will work just as well here and without the need for the

Ron Tarrant (3/13) Sep 12 2019 Ah! Thanks for clearing that up, Mike. My D knowledge is still

=?UTF-8?Q?Ali_=c3=87ehreli?= (4/5) Sep 12 2019 I think my index can be useful in such searches. Both q"" and q{} are th...

Ron Tarrant (3/10) Sep 13 2019 Thanks, Ali. I suppose I should be looking in your book first

Ron Tarrant <rontarrant gmail.com> writes:

I found this presented as a solution in a 2016 post:

On Wednesday, 15 June 2016 at 22:05:37 UTC, captaindet wrote:

 enum myCSS = q{
     GtkNotebook {
         background-color: #e9e9e9;
     }
     GtkNotebook tab {
         background-color: #d6d6d6;
     }
 };

But when I try to use it, I get the following errors:

Warning: C preprocessor directive #e9e9e9 is not supported
Warning: C preprocessor directive #d6d6d6 is not supported

I thought it was odd having 'q' in front of the opening curly 
brace... is this a typo? Shorthand for "string quote"? Something 
like that?

Or do I need to escape these somehow?

Sep 12 2019

Max Samukha <maxsamukha gmail.com> writes:

On Thursday, 12 September 2019 at 09:54:35 UTC, Ron Tarrant wrote:
 I found this presented as a solution in a 2016 post:

 On Wednesday, 15 June 2016 at 22:05:37 UTC, captaindet wrote:

 enum myCSS = q{
     GtkNotebook {
         background-color: #e9e9e9;
     }
     GtkNotebook tab {
         background-color: #d6d6d6;
     }
 };

 But when I try to use it, I get the following errors:

 Warning: C preprocessor directive #e9e9e9 is not supported
 Warning: C preprocessor directive #d6d6d6 is not supported

 I thought it was odd having 'q' in front of the opening curly 
 brace... is this a typo? Shorthand for "string quote"? 
 Something like that?

 Or do I need to escape these somehow?

q{} is a string that must only contain valid D tokens. D lexer 
does not like C directives. 
https://dlang.org/spec/lex.html#token_strings

Sep 12 2019

Andrea Fontana <nospam example.com> writes:

On Thursday, 12 September 2019 at 09:54:35 UTC, Ron Tarrant wrote:
 I found this presented as a solution in a 2016 post:

 On Wednesday, 15 June 2016 at 22:05:37 UTC, captaindet wrote:

 enum myCSS = q{
     GtkNotebook {
         background-color: #e9e9e9;
     }
     GtkNotebook tab {
         background-color: #d6d6d6;
     }
 };

 But when I try to use it, I get the following errors:

 Warning: C preprocessor directive #e9e9e9 is not supported
 Warning: C preprocessor directive #d6d6d6 is not supported

 I thought it was odd having 'q' in front of the opening curly 
 brace... is this a typo? Shorthand for "string quote"? 
 Something like that?

 Or do I need to escape these somehow?

They are named "token string" and contained code must be a valid 
d code. See https://dlang.org/spec/lex.html#token_strings

Sep 12 2019

Ron Tarrant <rontarrant gmail.com> writes:

On Thursday, 12 September 2019 at 10:09:06 UTC, Andrea Fontana 
wrote:
 On Thursday, 12 September 2019 at 09:54:35 UTC, Ron Tarrant 
 wrote:
 I found this presented as a solution in a 2016 post:

 On Wednesday, 15 June 2016 at 22:05:37 UTC, captaindet wrote:

 enum myCSS = q{
     GtkNotebook {
         background-color: #e9e9e9;
     }
     GtkNotebook tab {
         background-color: #d6d6d6;
     }
 };

 But when I try to use it, I get the following errors:

 Warning: C preprocessor directive #e9e9e9 is not supported
 Warning: C preprocessor directive #d6d6d6 is not supported

 I thought it was odd having 'q' in front of the opening curly 
 brace... is this a typo? Shorthand for "string quote"? 
 Something like that?

 Or do I need to escape these somehow?

 They are named "token string" and contained code must be a 
 valid d code. See https://dlang.org/spec/lex.html#token_strings

Thanks, Andrea and Max.

Turns out there's a simpler way to inject CSS into D code. In 
case anyone else comes looking, I found that instead of an enum, 
a string will do. Here's the solution I came up with to make 
visible tabs in a Notebook:

class CSS // GTK4 compliant
{
	CssProvider provider;
	string cssPath = "./css/visible_tabs.css";

	string myCSS = "tab { background-color: #f2f2f2; }";

	this(StyleContext styleContext)
	{
		provider = new CssProvider();
		provider.loadFromData(myCSS);
		styleContext.addProvider(provider, 
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
		
	} // this()	
	
} // class CSS

And in the class that will use it, this line does it:

	css = new CSS(getStyleContext());

Sep 12 2019

Ron Tarrant <rontarrant gmail.com> writes:

On Thursday, 12 September 2019 at 11:35:04 UTC, Ron Tarrant wrote:
 On Thursday, 12 September 2019 at 10:09:06 UTC, Andrea Fontana 
 wrote:
 On Thursday, 12 September 2019 at 09:54:35 UTC, Ron Tarrant 
 wrote:
 I found this presented as a solution in a 2016 post:

 On Wednesday, 15 June 2016 at 22:05:37 UTC, captaindet wrote:

 enum myCSS = q{
     GtkNotebook {
         background-color: #e9e9e9;
     }
     GtkNotebook tab {
         background-color: #d6d6d6;
     }
 };

 But when I try to use it, I get the following errors:

 Warning: C preprocessor directive #e9e9e9 is not supported
 Warning: C preprocessor directive #d6d6d6 is not supported

 I thought it was odd having 'q' in front of the opening curly 
 brace... is this a typo? Shorthand for "string quote"? 
 Something like that?

 Or do I need to escape these somehow?

 They are named "token string" and contained code must be a 
 valid d code. See https://dlang.org/spec/lex.html#token_strings

 Thanks, Andrea and Max.

 Turns out there's a simpler way to inject CSS into D code. In 
 case anyone else comes looking, I found that instead of an 
 enum, a string will do. Here's the solution I came up with to 
 make visible tabs in a Notebook:

That should have been:

class CSS // GTK4 compliant
{
	CssProvider provider;
	string myCSS = "tab { background-color: #f2f2f2; }";

	this(StyleContext styleContext)
	{
		provider = new CssProvider();
		provider.loadFromData(myCSS);
		styleContext.addProvider(provider, 
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
		
	} // this()	
	
} // class CSS

The CSS path/file name isn't needed.

Sep 12 2019

Mike Parker <aldacron gmail.com> writes:

On Thursday, 12 September 2019 at 11:40:33 UTC, Ron Tarrant wrote:

 	string myCSS = "tab { background-color: #f2f2f2; }";

enum will work just as well here and without the need for the 
variable:

         enum myCSS = "tab { background-color: #f2f2f2; }";

The original error was because q strings have to be valid D, not 
because of the enum.

Sep 12 2019

Ron Tarrant <rontarrant gmail.com> writes:

On Thursday, 12 September 2019 at 13:09:16 UTC, Mike Parker wrote:
 On Thursday, 12 September 2019 at 11:40:33 UTC, Ron Tarrant 
 wrote:

 	string myCSS = "tab { background-color: #f2f2f2; }";

 enum will work just as well here and without the need for the 
 variable:

         enum myCSS = "tab { background-color: #f2f2f2; }";

 The original error was because q strings have to be valid D, 
 not because of the enum.

Ah! Thanks for clearing that up, Mike. My D knowledge is still 
rather sparse, so this fills in another blank for me.

Sep 12 2019

=?UTF-8?Q?Ali_=c3=87ehreli?= <acehreli yahoo.com> writes:

On 09/12/2019 02:54 AM, Ron Tarrant wrote:

 I thought it was odd having 'q' in front of the opening curly brace...

I think my index can be useful in such searches. Both q"" and q{} are there:

   http://ddili.org/ders/d.en/ix.html

Ali

Sep 12 2019

Ron Tarrant <rontarrant gmail.com> writes:

On Thursday, 12 September 2019 at 19:14:26 UTC, Ali Çehreli wrote:
 On 09/12/2019 02:54 AM, Ron Tarrant wrote:

 I thought it was odd having 'q' in front of the opening curly

 brace...

 I think my index can be useful in such searches. Both q"" and 
 q{} are there:

   http://ddili.org/ders/d.en/ix.html

 Ali

Thanks, Ali. I suppose I should be looking in your book first 
when I have a question... as I so often do.

Sep 13 2019

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digitalmars.D.learn - Using CSS Data from Within My Code