On Sun, 19 May 2019 10:29:54 GMT, Ron Tarrant wrote:

How can I find out which features are implemented and which aren't? Is it a matter of digging through the source, or is there another way?

Forgot to say...

The reason I ask: I'm digging into using CSS and I've had some success with setting colors and fonts for Labels, but for Buttons, I can only affect the font, not the colors, and I'm wondering if it's because not all the CSS properties/attributes are available for the Button widget.

I also can't seem to set the background-color for a window, either.

And that got me wondering about what else hasn't been implemented... if that is that case.

Here's the D code:

// Test Rig Foundation for Learning GtkD Coding

import std.stdio;

import gtk.MainWindow;
import gtk.Main;
import gtk.Box;
import gtk.Widget;
import gtk.Button;
import gtk.Label;
import gtk.CssProvider;
import gtk.StyleContext;
import gdk.Screen;

void main(string[] args)
{
	Main.init(args);

	TestRigWindow myTestRig = new TestRigWindow("Test Rig");
	
	Main.run();
	
} // main()


class TestRigWindow : MainWindow
{
	AppBox appBox;
	string cssName = "mywindow";
	Screen screen;
	CssProvider cssProvider;
	string cssFile = "./theme.css";
	StyleContext styleContext;
	
	this(string title)
	{
		super(title);
		setName(cssName);
		writeln("window name: ", getName());

		screen = getScreen();
		
		cssProvider = new CssProvider();
		cssProvider.loadFromPath(cssFile);
		
		styleContext = new StyleContext();
		styleContext.addProviderForScreen(screen, cssProvider, STYLE_PROVIDER_PRIORITY_FALLBACK);

		addOnDestroy(&quitApp);
		
		appBox = new AppBox();
		add(appBox);
		
		showAll();

	} // this() CONSTRUCTOR
	
		
	void quitApp(Widget widget)
	{
		writeln("Bye.");
		Main.quit();
		
	} // quitApp()

} // class myAppWindow


class AppBox : Box
{
	CSSButton cssButton1, cssButton2;
	CSSLabel cssLabel1, cssLabel2, cssLabel3;
	string button1Text = "CSS Button 1", button2Text = "CSS Button 2";
	string button1CSSName = "button1", button2CSSName = "button2";
	string label1Text = "Hello 1", label2Text = "Hello 2 U", label3Text = "Hello 3";
	string label1CSSName = "label1", label2CSSName = "label2",label3CSSName = "label3";
	
	this()
	{
		super(Orientation.VERTICAL, 25);
		
		cssButton1 = new CSSButton(button1Text, button1CSSName);
		cssLabel1 = new CSSLabel(label1Text, label1CSSName);
		cssLabel2 = new CSSLabel(label2Text, label2CSSName);
		cssLabel3 = new CSSLabel(label3Text, label3CSSName);
		cssButton2 = new CSSButton(button2Text, button2CSSName);
		
		setHomogeneous(true);

		// packStart(<child object>, false, false, 0); // LEFT justify
		add(cssButton1);
		add(cssLabel1);
		add(cssLabel2);
		add(cssLabel3);
		add(cssButton2);
				
		// packEnd(<child object>, false, false, 0); // RIGHT justify
		
	} // this()

} // class AppBox


class CSSButton : Button
{
	this(string textLabel, string cssName)
	{
		super(textLabel);
		setName(cssName);
		
	} // this()
	
} // class CSSButton


class CSSLabel : Label
{
	this(string textLabel, string cssName)
	{
		super(textLabel);
		setName(cssName);
		
	} // this()
	
} // class CSSLabel

And here's my CSS file (saved as theme.css in the same folder):

#mywindow
{
	font-family: "Times New Roman";
	font-size: 12px;
	background-color: rgba(233,23,34,1);
}

button.text-button#button2
{
	color: green;
	background-color: blue;
	font-family: "Bodoni MT";
	font-size: 20px;
	text-decoration: underline;
}

button.text-button#button1
{
	font-family: "Comic Sans MS";
	font-size: 16px;
	color: red;
	background-color: yellow;
}

label#label1
{
	font-family: "Times New Roman";
	color: red;
	background-color: yellow;
}

label#label2
{
	color: green;
	background-color: yellow;
}

label#label3
{
	color: blue;
	background-color: yellow;
}

Of those attributes I've tested, here's what works:

• for Labels:
  -- font-family,
  -- color,
  -- background-color,
  -- font-size,
• for Buttons:
  -- font-family,
  -- font-size,

And from what I've tested so far, here's what does NOT work:

• Window:
  -- font-family,
  -- font-size,
  -- background-color.

Although I'm really not sure where I would see CSS font changes in a Window... the titlebar?

According to the examples I've been able to find for other languages, the background-color should be the background of the Window. I tried one example with just a Window and nothing else and the background-color setting still does nothing. Oh. And I tried both named colors (ie. blue, green) as well as the rgba() form. Same results.

And neither do these:

• Button:
  -- color,
  -- background-color,
  -- text-decoration.