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Add API to render a Icon with a text caption

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This commit is contained in:
Robin Gareus 2022-01-15 03:15:51 +01:00
parent 203017e2d5
commit 21c22cc850
Signed by: rgareus
GPG Key ID: A090BCE02CF57F04
2 changed files with 48 additions and 0 deletions
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43
libs/widgets/ardour_icon.cc
View File

@ -1434,3 +1434,46 @@ ArdourWidgets::ArdourIcon::expose (GdkEventExpose* ev, Gtk::Widget* w, const enu
return true;
}
bool
ArdourWidgets::ArdourIcon::expose_with_text (GdkEventExpose* ev, Gtk::Widget* w, const enum ArdourIcon::Icon icon, std::string const& caption)
{
Glib::RefPtr<Gdk::Window> win (w->get_window());
cairo_t* cr = gdk_cairo_create (win->gobj());
gdk_cairo_rectangle (cr, &ev->area);
cairo_clip (cr);
int width = win->get_width ();
int height = win->get_height ();
Glib::RefPtr<Gtk::Style> style = w->get_style();
Gdk::Color fg (style->get_fg (Gtk::STATE_NORMAL));
const uint32_t fg_color = RGBA_TO_UINT (fg.get_red() / 255., fg.get_green() / 255, fg.get_blue() / 255, 255);
Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (w->get_pango_context());
layout->set_font_description (style->get_font());
layout->set_alignment (Pango::ALIGN_CENTER);
layout->set_text (caption);
int text_width, text_height;
layout->get_pixel_size (text_width, text_height);
if (width > text_width && height > text_height) {
/* TODO: either change render methods to return used w/h e.g. (int& width, int& height),
* or add a parameter to allow the called to specify the max y-offset.
* 170 is to match max-size of ::icon_shaded_plus_sign ()
*/
const double wh = std::min (170, std::min (width, height));
cairo_move_to (cr, 0.5 * (width - text_width), .5 * (height + wh) - text_height - 2);
Gtkmm2ext::set_source_rgba (cr, fg_color);
pango_cairo_show_layout (cr, layout->gobj());
} else {
text_height = 0;
}
ArdourIcon::render (cr, icon, win->get_width (), win->get_height () - text_height, Gtkmm2ext::ExplicitActive, fg_color);
cairo_destroy (cr);
return true;
}

5
libs/widgets/widgets/ardour_icon.h
View File

@ -84,6 +84,11 @@ namespace ArdourWidgets { namespace ArdourIcon {
Gtk::Widget* w,
const enum Icon icon);
LIBWIDGETS_API bool expose_with_text (GdkEventExpose* ev,
Gtk::Widget* w,
const enum Icon icon,
std::string const&);
}; } /* end namespace */
#endif