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switch to benjamin otte's implemention of fit_to_pixels() but leave uncommented because this prototype is not used; move 2 other non-ardour-specific utility functions into gtkmm2ext

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git-svn-id: svn://localhost/ardour2/branches/3.0@10931 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
Paul Davis 2011-12-07 13:07:43 +00:00
parent 46b52f4b51
commit 2f837b66f7
2 changed files with 75 additions and 10 deletions
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81
libs/gtkmm2ext/utils.cc
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@ -28,6 +28,7 @@
#include <gtkmm/button.h>
#include <gtkmm/window.h>
#include <gtkmm/paned.h>
#include <gtkmm/label.h>
#include <gtkmm/comboboxtext.h>
#include "i18n.h"
@ -488,26 +489,86 @@ Gtkmm2ext::window_to_draw_on (Gtk::Widget& w, Gtk::Widget** parent)
return Glib::RefPtr<Gdk::Window> ();
}
int
Gtkmm2ext::pixel_width (const string& str, Pango::FontDescription& font)
{
Gtk::Label foo;
Glib::RefPtr<Pango::Layout> layout = foo.create_pango_layout ("");
layout->set_font_description (font);
layout->set_text (str);
int width, height;
Gtkmm2ext::get_ink_pixel_size (layout, width, height);
return width;
}
#if 0
string
fit_to_pixels (const string& str, int pixel_width, Pango::FontDescription& font, int& actual_width, bool with_ellipses)
Gtkmm2ext::fit_to_pixels (const string& str, int pixel_width, Pango::FontDescription& font, int& actual_width, bool with_ellipses)
{
Label foo;
/* DECEMBER 2011: THIS PROTOTYPE OF fit_to_pixels() IS NOT USED
ANYWHERE AND HAS NOT BEEN TESTED.
*/
Gtk::Label foo;
Glib::RefPtr<Pango::Layout> layout = foo.create_pango_layout (str);
Glib::RefPtr<Pango::LayoutLine> line;
Glib::RefPtr<const Pango::LayoutLine> line;
layout->set_font_description (font);
layout->set_width (pixel_width * PANGO_SCALE);
if (with_ellipsis)
layout->set_ellipsize (PANGO_ELLIPSIZE_END);
else
layout->set_wrap_mode (PANGO_WRAP_CHAR);
if (with_ellipses) {
layout->set_ellipsize (Pango::ELLIPSIZE_END);
} else {
layout->set_wrap (Pango::WRAP_CHAR);
}
line = layout->get_line_readonly (0);
line = layout->get_line (0);
/* XXX: might need special care to get the ellipsis character, not sure
how that works */
return strdup (layout->get_text () + line->start_index, line->length);
how that works
*/
string s = string (layout->get_text ().substr(line->get_start_index(), line->get_length()));
cerr << "fit to pixels of " << str << " returns " << s << endl;
return s;
}
#endif
/** Try to fit a string into a given horizontal space by ellipsizing it.
* @param cr Cairo context in which the text will be plotted.
* @param name Text.
* @param avail Available horizontal space.
* @return (Text, possibly ellipsized) and (horizontal size of text)
*/
std::pair<std::string, double>
Gtkmm2ext::fit_to_pixels (cairo_t* cr, std::string name, double avail)
{
/* XXX hopefully there exists a more efficient way of doing this */
bool abbreviated = false;
uint32_t width = 0;
while (1) {
cairo_text_extents_t ext;
cairo_text_extents (cr, name.c_str(), &ext);
if (ext.width < avail || name.length() <= 4) {
width = ext.width;
break;
}
if (abbreviated) {
name = name.substr (0, name.length() - 4) + "...";
} else {
name = name.substr (0, name.length() - 3) + "...";
abbreviated = true;
}
}
return std::make_pair (name, width);
}