问题
I have a GtkEntry that's I'd like to allow users to style with their choice of font (or system default). I end up with a Pango description string like "Monospace 10" to describe the font.
I'm currently using override_font
, which is deprecated in favour of CSS styling.
I'd like to at least attempt to do it "right", but it seems like a pretty convoluted and fragile workflow now to get the CSS from the Pango string. Here's an example from Github:
def _get_editor_font_css():
"""Return CSS for custom editor font."""
font_desc = Pango.FontDescription("monospace")
if (gaupol.conf.editor.custom_font and
gaupol.conf.editor.use_custom_font):
font_desc = Pango.FontDescription(gaupol.conf.editor.custom_font)
# They broke theming again with GTK+ 3.22.
unit = "pt" if Gtk.check_version(3, 22, 0) is None else "px"
css = """
.gaupol-custom-font {{
font-family: {family},monospace;
font-size: {size}{unit};
font-weight: {weight};
}}""".format(
family=font_desc.get_family().split(",")[0],
size=int(round(font_desc.get_size() / Pango.SCALE)),
unit=unit,
weight=int(font_desc.get_weight()))
css = css.replace("font-size: 0{unit};".format(unit=unit), "")
css = css.replace("font-weight: 0;", "")
css = "\n".join(filter(lambda x: x.strip(), css.splitlines()))
return css
After the CSS is in a string, then I can create a CSSProvider
and pass that to the style context's add_provider()
(does this end up accumulating CSS providers, by the way?).
This all seems like a lot of work to get the font back into the system, where it presumably goes right back into Pango!
Is this really the right way to go about it?
回答1:
Use PangoContext.
#include <gtkmm.h>
int main(int argc, char* argv[])
{
auto GtkApp = Gtk::Application::create();
Gtk::Window window;
Gtk::Label label;
label.set_label("asdasdfdfg dfgsdfg ");
auto context = label.get_pango_context();
auto fontDescription = context->get_font_description();
fontDescription.set_family("Monospace");
fontDescription.set_absolute_size(10*Pango::SCALE);
context->set_font_description(fontDescription);
Gtk::Label label2;
label2.set_label("xcv");
Gtk::VBox box;
box.pack_start(label);
box.pack_start(label2);
window.add(box);
window.show_all();
GtkApp->run(window);
return 0;
}
Result:
来源:https://stackoverflow.com/questions/41257101/setting-gtkentry-font-from-pango-fontdescription