X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=gtk2_ardour%2Futils.cc;h=72b128c02fa44cebc5b0f4e49d525a3d2c86f69b;hb=bcf885b4be6c20c65b076640df9e3c9a3e52d5b7;hp=fde9d545bbf77149996093ace177dc2c09f8b120;hpb=49ab3aa0b3e78b635c22512b30f44b951c1401f7;p=ardour.git

diff --git a/gtk2_ardour/utils.cc b/gtk2_ardour/utils.cc
index fde9d545bb..72b128c02f 100644
--- a/gtk2_ardour/utils.cc
+++ b/gtk2_ardour/utils.cc
@@ -1,7 +1,7 @@
 /*
-    Copyright (C) 2003 Paul Davis 
+    Copyright (C) 2003 Paul Davis
 
-    This program is free software; you can redistribute it and/or modify
+    This program is free software; you an redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
@@ -15,24 +15,33 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id$
 */
 
+#include <pango/pangoft2.h> // for fontmap resolution control for GnomeCanvas
+#include <pango/pangocairo.h> // for fontmap resolution control for GnomeCanvas
+
 #include <cstdlib>
 #include <cctype>
 #include <fstream>
 #include <sys/stat.h>
 #include <libart_lgpl/art_misc.h>
+#include <gtkmm/rc.h>
 #include <gtkmm/window.h>
 #include <gtkmm/combo.h>
 #include <gtkmm/label.h>
 #include <gtkmm/paned.h>
 #include <gtk/gtkpaned.h>
 
+#include "pbd/file_utils.h"
+
 #include <gtkmm2ext/utils.h>
-#include <ardour/ardour.h>
+#include "ardour/configuration.h"
+#include "ardour/configuration.h"
+
+#include "ardour/filesystem_paths.h"
 
 #include "ardour_ui.h"
+#include "public_editor.h"
 #include "keyboard.h"
 #include "utils.h"
 #include "i18n.h"
@@ -43,13 +52,32 @@ using namespace std;
 using namespace Gtk;
 using namespace sigc;
 using namespace Glib;
+using namespace PBD;
+
+sigc::signal<void>  DPIReset;
+
+int
+pixel_width (const ustring& str, Pango::FontDescription& font)
+{
+	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;
+}
 
 ustring
-fit_to_pixels (const ustring& str, int pixel_width, Pango::FontDescription& font, int& actual_width)
+fit_to_pixels (const ustring& str, int pixel_width, Pango::FontDescription& font, int& actual_width, bool with_ellipses)
 {
 	Label foo;
 	Glib::RefPtr<Pango::Layout> layout = foo.create_pango_layout ("");
-	
+	ustring::size_type shorter_by = 0;
+	ustring txt;
+
 	layout->set_font_description (font);
 
 	actual_width = 0;
@@ -58,9 +86,11 @@ fit_to_pixels (const ustring& str, int pixel_width, Pango::FontDescription& font
 	ustring::iterator last = ustr.end();
 	--last; /* now points at final entry */
 
+	txt = ustr;
+
 	while (!ustr.empty()) {
 
-		layout->set_text (ustr);
+		layout->set_text (txt);
 
 		int width, height;
 		Gtkmm2ext::get_ink_pixel_size (layout, width, height);
@@ -69,19 +99,77 @@ fit_to_pixels (const ustring& str, int pixel_width, Pango::FontDescription& font
 			actual_width = width;
 			break;
 		}
-		
-		ustr.erase (last);
-		--last;
+
+		ustr.erase (last--);
+		shorter_by++;
+
+		if (with_ellipses && shorter_by > 3) {
+			txt = ustr;
+			txt += "...";
+		} else {
+			txt = ustr;
+		}
 	}
 
-	return ustr;
+	return txt;
 }
 
+/** 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>
+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);
+}
+
+
+/** Add an element to a menu, settings its sensitivity.
+ * @param m Menu to add to.
+ * @param e Element to add.
+ * @param s true to make sensitive, false to make insensitive
+ */
+void
+add_item_with_sensitivity (Menu_Helpers::MenuList& m, Menu_Helpers::MenuElem e, bool s)
+{
+	m.push_back (e);
+	if (!s) {
+		m.back().set_sensitive (false);
+	}
+}
+
+
 gint
-just_hide_it (GdkEventAny *ev, Gtk::Window *win)
+just_hide_it (GdkEventAny */*ev*/, Gtk::Window *win)
 {
-	win->hide_all ();
-	return TRUE;
+	win->hide ();
+	return 0;
 }
 
 /* xpm2rgb copied from nixieclock, which bore the legend:
@@ -99,23 +187,23 @@ xpm2rgb (const char** xpm, uint32_t& w, uint32_t& h)
 	uint32_t t, x, y, colors, cpp;
 	unsigned char c;
 	unsigned char *savergb, *rgb;
-	
+
 	// PARSE HEADER
-	
+
 	if ( sscanf(xpm[0], "%u%u%u%u", &w, &h, &colors, &cpp) != 4 ) {
 		error << string_compose (_("bad XPM header %1"), xpm[0])
 		      << endmsg;
 		return 0;
 	}
 
-	savergb = rgb = (unsigned char*)art_alloc (h * w * 3);
-	
+	savergb = rgb = (unsigned char*) malloc (h * w * 3);
+
 	// LOAD XPM COLORMAP LONG ENOUGH TO DO CONVERSION
 	for (t = 0; t < colors; ++t) {
 		sscanf (xpm[t+1], "%c c #%lx", &c, &val);
 		vals[c] = val;
 	}
-	
+
 	// COLORMAP -> RGB CONVERSION
 	//    Get low 3 bytes from vals[]
 	//
@@ -151,8 +239,8 @@ xpm2rgba (const char** xpm, uint32_t& w, uint32_t& h)
 		return 0;
 	}
 
-	savergb = rgb = (unsigned char*)art_alloc (h * w * 4);
-	
+	savergb = rgb = (unsigned char*) malloc (h * w * 4);
+
 	// LOAD XPM COLORMAP LONG ENOUGH TO DO CONVERSION
 
 	if (strstr (xpm[1], "None")) {
@@ -167,7 +255,7 @@ xpm2rgba (const char** xpm, uint32_t& w, uint32_t& h)
 		sscanf (xpm[t+1], "%c c #%lx", &c, &val);
 		vals[c] = val;
 	}
-	
+
 	// COLORMAP -> RGB CONVERSION
 	//    Get low 3 bytes from vals[]
 	//
@@ -198,7 +286,7 @@ xpm2rgba (const char** xpm, uint32_t& w, uint32_t& h)
 }
 
 ArdourCanvas::Points*
-get_canvas_points (string who, uint32_t npoints)
+get_canvas_points (string /*who*/, uint32_t npoints)
 {
 	// cerr << who << ": wants " << npoints << " canvas points" << endl;
 #ifdef TRAP_EXCESSIVE_POINT_REQUESTS
@@ -209,79 +297,35 @@ get_canvas_points (string who, uint32_t npoints)
 	return new ArdourCanvas::Points (npoints);
 }
 
-Pango::FontDescription
+Pango::FontDescription*
 get_font_for_style (string widgetname)
 {
 	Gtk::Window window (WINDOW_TOPLEVEL);
 	Gtk::Label foobar;
-	Glib::RefPtr<Style> style;
+	Glib::RefPtr<Gtk::Style> style;
 
 	window.add (foobar);
 	foobar.set_name (widgetname);
 	foobar.ensure_style();
 
 	style = foobar.get_style ();
-	return style->get_font();
-}
 
-gint
-pane_handler (GdkEventButton* ev, Gtk::Paned* pane)
-{
-	if (ev->window != Gtkmm2ext::get_paned_handle (*pane)) {
-		return FALSE;
-	}
-
-	if (Keyboard::is_delete_event (ev)) {
+	Glib::RefPtr<const Pango::Layout> layout = foobar.get_layout();
 
-		gint pos;
-		gint cmp;
-		
-		pos = pane->get_position ();
+	PangoFontDescription *pfd = (PangoFontDescription *)pango_layout_get_font_description((PangoLayout *)layout->gobj());
 
-		if (dynamic_cast<VPaned*>(pane)) {
-			cmp = pane->get_height();
-		} else {
-			cmp = pane->get_width();
-		}
-
-		/* we have to use approximations here because we can't predict the
-		   exact position or sizes of the pane (themes, etc)
-		*/
+	if (!pfd) {
 
-		if (pos < 10 || abs (pos - cmp) < 10) {
+		/* layout inherited its font description from a PangoContext */
 
-			/* already collapsed: restore it (note that this is cast from a pointer value to int, which is tricky on 64bit */
-			
-			pane->set_position ((intptr_t) pane->get_data ("rpos"));
-
-		} else {	
-
-			int collapse_direction;
-
-			/* store the current position */
-
-			pane->set_data ("rpos", (gpointer) pos);
-
-			/* collapse to show the relevant child in full */
-			
-			collapse_direction = (intptr_t) pane->get_data ("collapse-direction");
-
-			if (collapse_direction) {
-				pane->set_position (1);
-			} else {
-				if (dynamic_cast<VPaned*>(pane)) {
-					pane->set_position (pane->get_height());
-				} else {
-					pane->set_position (pane->get_width());
-				}
-			}
-		}
-
-		return TRUE;
-	} 
+		PangoContext* ctxt = (PangoContext*) pango_layout_get_context ((PangoLayout*) layout->gobj());
+		pfd =  pango_context_get_font_description (ctxt);
+		return new Pango::FontDescription (pfd, true); /* make a copy */
+	}
 
-	return FALSE;
+	return new Pango::FontDescription (pfd, true); /* make a copy */
 }
+
 uint32_t
 rgba_from_style (string style, uint32_t r, uint32_t g, uint32_t b, uint32_t a, string attr, int state, bool rgba)
 {
@@ -296,12 +340,12 @@ rgba_from_style (string style, uint32_t r, uint32_t g, uint32_t b, uint32_t a, s
 	}
 
 	Gtk::Label foo;
-	
+
 	window->add (foo);
 
 	foo.set_name (style);
 	foo.ensure_style ();
-	
+
 	GtkRcStyle* waverc = foo.get_style()->gobj()->rc_style;
 
 	if (waverc) {
@@ -309,6 +353,7 @@ rgba_from_style (string style, uint32_t r, uint32_t g, uint32_t b, uint32_t a, s
 			r = waverc->fg[state].red / 257;
 			g = waverc->fg[state].green / 257;
 			b = waverc->fg[state].blue / 257;
+
 			/* what a hack ... "a" is for "active" */
 			if (state == Gtk::STATE_NORMAL && rgba) {
 				a = waverc->fg[GTK_STATE_ACTIVE].red / 257;
@@ -332,7 +377,7 @@ rgba_from_style (string style, uint32_t r, uint32_t g, uint32_t b, uint32_t a, s
 	}
 
 	window->remove ();
-	
+
 	if (state == Gtk::STATE_NORMAL && rgba) {
 		return (uint32_t) RGBA_TO_UINT(r,g,b,a);
 	} else {
@@ -340,7 +385,113 @@ rgba_from_style (string style, uint32_t r, uint32_t g, uint32_t b, uint32_t a, s
 	}
 }
 
-bool 
+
+Gdk::Color
+color_from_style (string widget_style_name, int state, string attr)
+{
+	GtkStyle* style;
+
+	style = gtk_rc_get_style_by_paths (gtk_settings_get_default(),
+					   widget_style_name.c_str(),
+					   0, G_TYPE_NONE);
+
+	if (!style) {
+		error << string_compose (_("no style found for %1, using red"), style) << endmsg;
+		return Gdk::Color ("red");
+	}
+
+	if (attr == "fg") {
+		return Gdk::Color (&style->fg[state]);
+	}
+
+	if (attr == "bg") {
+		return Gdk::Color (&style->bg[state]);
+	}
+
+	if (attr == "light") {
+		return Gdk::Color (&style->light[state]);
+	}
+
+	if (attr == "dark") {
+		return Gdk::Color (&style->dark[state]);
+	}
+
+	if (attr == "mid") {
+		return Gdk::Color (&style->mid[state]);
+	}
+
+	if (attr == "text") {
+		return Gdk::Color (&style->text[state]);
+	}
+
+	if (attr == "base") {
+		return Gdk::Color (&style->base[state]);
+	}
+
+	if (attr == "text_aa") {
+		return Gdk::Color (&style->text_aa[state]);
+	}
+
+	error << string_compose (_("unknown style attribute %1 requested for color; using \"red\""), attr) << endmsg;
+	return Gdk::Color ("red");
+}
+
+Glib::RefPtr<Gdk::GC>
+gc_from_style (string widget_style_name, int state, string attr)
+{
+        GtkStyle* style;
+
+        style = gtk_rc_get_style_by_paths (gtk_settings_get_default(),
+                                           widget_style_name.c_str(),
+                                           0, G_TYPE_NONE);
+
+        if (!style) {
+                error << string_compose (_("no style found for %1, using red"), style) << endmsg;
+		Glib::RefPtr<Gdk::GC> ret = Gdk::GC::create();
+		ret->set_rgb_fg_color(Gdk::Color("red"));
+                return ret;
+        }
+
+        if (attr == "fg") {
+                return Glib::wrap(style->fg_gc[state]);
+        }
+
+        if (attr == "bg") {
+                return Glib::wrap(style->bg_gc[state]);
+        }
+
+        if (attr == "light") {
+                return Glib::wrap(style->light_gc[state]);
+        }
+
+        if (attr == "dark") {
+                return Glib::wrap(style->dark_gc[state]);
+        }
+
+        if (attr == "mid") {
+                return Glib::wrap(style->mid_gc[state]);
+        }
+
+        if (attr == "text") {
+                return Glib::wrap(style->text_gc[state]);
+        }
+
+        if (attr == "base") {
+                return Glib::wrap(style->base_gc[state]);
+        }
+
+        if (attr == "text_aa") {
+                return Glib::wrap(style->text_aa_gc[state]);
+        }
+
+        error << string_compose (_("unknown style attribute %1 requested for color; using \"red\""), attr) << endmsg;
+	Glib::RefPtr<Gdk::GC> ret = Gdk::GC::create();
+	ret->set_rgb_fg_color(Gdk::Color("red"));
+        return ret;
+}
+
+
+bool
 canvas_item_visible (ArdourCanvas::Item* item)
 {
 	return (item->gobj()->object.flags & GNOME_CANVAS_ITEM_VISIBLE) ? true : false;
@@ -352,18 +503,59 @@ set_color (Gdk::Color& c, int rgb)
 	c.set_rgb((rgb >> 16)*256, ((rgb & 0xff00) >> 8)*256, (rgb & 0xff)*256);
 }
 
+#ifdef GTKOSX
+extern "C" {
+	gboolean gdk_quartz_possibly_forward (GdkEvent*);
+}
+#endif
+
+bool
+relay_key_press (GdkEventKey* ev, Gtk::Window* win)
+{
+	if (!key_press_focus_accelerator_handler (*win, ev)) {
+		return PublicEditor::instance().on_key_press_event(ev);
+	} else {
+		return true;
+	}
+}
+
 bool
 key_press_focus_accelerator_handler (Gtk::Window& window, GdkEventKey* ev)
 {
 	GtkWindow* win = window.gobj();
 	GtkWidget* focus = gtk_window_get_focus (win);
 	bool special_handling_of_unmodified_accelerators = false;
+	bool allow_activating = true;
 
+#undef DEBUG_ACCELERATOR_HANDLING
+#ifdef  DEBUG_ACCELERATOR_HANDLING
+	//bool debug = (getenv ("ARDOUR_DEBUG_ACCELERATOR_HANDLING") != 0);
+	bool debug=true;
+#endif
 	if (focus) {
-		if (GTK_IS_ENTRY(focus)) {
+		if (GTK_IS_ENTRY(focus) || Keyboard::some_magic_widget_has_focus()) {
 			special_handling_of_unmodified_accelerators = true;
 		}
-	} 
+	}
+
+#ifdef GTKOSX
+	/* should this be universally true? */
+	if (Keyboard::some_magic_widget_has_focus ()) {
+		allow_activating = false;
+	}
+#endif
+
+#ifdef DEBUG_ACCELERATOR_HANDLING
+	if (debug) {
+		cerr << "Win = " << win << " Key event: code = " << ev->keyval << " state = " << hex << ev->state << dec << " special handling ? "
+		     << special_handling_of_unmodified_accelerators
+		     << " magic widget focus ? "
+		     << Keyboard::some_magic_widget_has_focus()
+		     << " allow_activation ? "
+		     << allow_activating
+		     << endl;
+	}
+#endif
 
 	/* This exists to allow us to override the way GTK handles
 	   key events. The normal sequence is:
@@ -374,18 +566,18 @@ key_press_focus_accelerator_handler (Gtk::Window& window, GdkEventKey* ev)
 	       the focus widget and/or focus chain
 
 	   The problem with this is that if the accelerators include
-	   keys without modifiers, such as the space bar or the 
+	   keys without modifiers, such as the space bar or the
 	   letter "e", then pressing the key while typing into
 	   a text entry widget results in the accelerator being
 	   activated, instead of the desired letter appearing
 	   in the text entry.
 
 	   There is no good way of fixing this, but this
-	   represents a compromise. The idea is that 
+	   represents a compromise. The idea is that
 	   key events involving modifiers (not Shift)
 	   get routed into the activation pathway first, then
 	   get propagated to the focus widget if necessary.
-	   
+
 	   If the key event doesn't involve modifiers,
 	   we deliver to the focus widget first, thus allowing
 	   it to get "normal text" without interference
@@ -396,41 +588,351 @@ key_press_focus_accelerator_handler (Gtk::Window& window, GdkEventKey* ev)
 	   all "normal text" accelerators.
 	*/
 
-	if (!special_handling_of_unmodified_accelerators ||
-	    ev->state & (Gdk::MOD1_MASK|
-			 Gdk::MOD2_MASK|
-			 Gdk::MOD3_MASK|
-			 Gdk::MOD4_MASK|
-			 Gdk::MOD5_MASK|
-			 Gdk::CONTROL_MASK|
-			 Gdk::LOCK_MASK)) {
 
-		/* no special handling or modifiers in effect: accelerate first */
+	if (!special_handling_of_unmodified_accelerators) {
 
-		if (!gtk_window_activate_key (win, ev)) {
-			return gtk_window_propagate_key_event (win, ev);
-		} else {
-			return true;
-		} 
+		/* pretend that certain key events that GTK does not allow
+		   to be used as accelerators are actually something that
+		   it does allow.
+		*/
+
+		uint32_t fakekey = ev->keyval;
+
+		if (possibly_translate_keyval_to_make_legal_accelerator (fakekey)) {
+			if (allow_activating && gtk_accel_groups_activate(G_OBJECT(win), fakekey, GdkModifierType(ev->state))) {
+				return true;
+			}
+
+#ifdef GTKOSX
+			if (allow_activating) {
+				int oldval = ev->keyval;
+				ev->keyval = fakekey;
+				if (gdk_quartz_possibly_forward ((GdkEvent*) ev)) {
+					return true;
+				}
+				ev->keyval = oldval;
+			}
+#endif
+		}
 	}
-	
+
+	/* consider all relevant modifiers but not LOCK or SHIFT */
+
+	guint mask = (Keyboard::RelevantModifierKeyMask & ~(Gdk::SHIFT_MASK|Gdk::LOCK_MASK));
+
+	if (!special_handling_of_unmodified_accelerators || (ev->state & mask)) {
+
+		/* no special handling or there are modifiers in effect: accelerate first */
+
+#ifdef DEBUG_ACCELERATOR_HANDLING
+		if (debug) {
+			cerr << "\tactivate, then propagate\n";
+		}
+#endif
+
+		if (allow_activating) {
+#ifdef GTKOSX
+			if (gdk_quartz_possibly_forward ((GdkEvent*) ev)) {
+				return true;
+			}
+#endif
+			if (gtk_window_activate_key (win, ev)) {
+				return true;
+			}
+		}
+
+#ifdef DEBUG_ACCELERATOR_HANDLING
+		if (debug) {
+			cerr << "\tnot accelerated, now propagate\n";
+		}
+#endif
+		return gtk_window_propagate_key_event (win, ev);
+	}
+
 	/* no modifiers, propagate first */
-	
+
+#ifdef DEBUG_ACCELERATOR_HANDLING
+	if (debug) {
+		cerr << "\tpropagate, then activate\n";
+	}
+#endif
 	if (!gtk_window_propagate_key_event (win, ev)) {
-		return gtk_window_activate_key (win, ev);
-	} 
+#ifdef DEBUG_ACCELERATOR_HANDLING
+		if (debug) {
+			cerr << "\tpropagation didn't handle, so activate\n";
+		}
+#endif
 
+		if (allow_activating) {
 
+#ifdef GTKOSX
+			if (gdk_quartz_possibly_forward ((GdkEvent*) ev)) {
+				return true;
+			}
+#endif
+			return gtk_window_activate_key (win, ev);
+		}
+
+	} else {
+#ifdef DEBUG_ACCELERATOR_HANDLING
+		if (debug) {
+			cerr << "\thandled by propagate\n";
+		}
+#endif
+		return true;
+	}
+
+#ifdef DEBUG_ACCELERATOR_HANDLING
+	if (debug) {
+		cerr << "\tnot handled\n";
+	}
+#endif
 	return true;
 }
 
-Glib::RefPtr<Gdk::Pixbuf>	
+Glib::RefPtr<Gdk::Pixbuf>
 get_xpm (std::string name)
 {
 	if (!xpm_map[name]) {
-		xpm_map[name] = Gdk::Pixbuf::create_from_file (ARDOUR::find_data_file(name, "pixmaps"));
+
+		SearchPath spath(ARDOUR::ardour_search_path());
+		spath += ARDOUR::system_data_search_path();
+
+		spath.add_subdirectory_to_paths("pixmaps");
+
+		sys::path data_file_path;
+
+		if(!find_file_in_search_path (spath, name, data_file_path)) {
+			fatal << string_compose (_("cannot find XPM file for %1"), name) << endmsg;
+		}
+
+		try {
+			xpm_map[name] =  Gdk::Pixbuf::create_from_file (data_file_path.to_string());
+		} catch(const Glib::Error& e)	{
+			warning << "Caught Glib::Error: " << e.what() << endmsg;
+		}
 	}
-		
-	return (xpm_map[name]);
+
+	return xpm_map[name];
 }
 
+Glib::ustring
+get_icon_path (const char* cname)
+{
+	string name = cname;
+	name += X_(".png");
+
+	SearchPath spath(ARDOUR::ardour_search_path());
+	spath += ARDOUR::system_data_search_path();
+
+	spath.add_subdirectory_to_paths("icons");
+
+	sys::path data_file_path;
+
+	if (!find_file_in_search_path (spath, name, data_file_path)) {
+		fatal << string_compose (_("cannot find icon image for %1"), name) << endmsg;
+	}
+
+	return data_file_path.to_string();
+}
+
+Glib::RefPtr<Gdk::Pixbuf>
+get_icon (const char* cname)
+{
+	Glib::RefPtr<Gdk::Pixbuf> img;
+	try {
+		img = Gdk::Pixbuf::create_from_file (get_icon_path (cname));
+	} catch (const Gdk::PixbufError &e) {
+		cerr << "Caught PixbufError: " << e.what() << endl;
+	} catch (...) {
+		g_message("Caught ... ");
+	}
+
+	return img;
+}
+
+string
+longest (vector<string>& strings)
+{
+	if (strings.empty()) {
+		return string ("");
+	}
+
+	vector<string>::iterator longest = strings.begin();
+	string::size_type longest_length = (*longest).length();
+
+	vector<string>::iterator i = longest;
+	++i;
+
+	while (i != strings.end()) {
+
+		string::size_type len = (*i).length();
+
+		if (len > longest_length) {
+			longest = i;
+			longest_length = len;
+		}
+
+		++i;
+	}
+
+	return *longest;
+}
+
+bool
+key_is_legal_for_numeric_entry (guint keyval)
+{
+	switch (keyval) {
+	case GDK_minus:
+	case GDK_plus:
+	case GDK_period:
+	case GDK_comma:
+	case GDK_0:
+	case GDK_1:
+	case GDK_2:
+	case GDK_3:
+	case GDK_4:
+	case GDK_5:
+	case GDK_6:
+	case GDK_7:
+	case GDK_8:
+	case GDK_9:
+	case GDK_KP_Add:
+	case GDK_KP_Subtract:
+	case GDK_KP_Decimal:
+	case GDK_KP_0:
+	case GDK_KP_1:
+	case GDK_KP_2:
+	case GDK_KP_3:
+	case GDK_KP_4:
+	case GDK_KP_5:
+	case GDK_KP_6:
+	case GDK_KP_7:
+	case GDK_KP_8:
+	case GDK_KP_9:
+	case GDK_Return:
+	case GDK_BackSpace:
+	case GDK_Delete:
+	case GDK_KP_Enter:
+	case GDK_Home:
+	case GDK_End:
+	case GDK_Left:
+	case GDK_Right:
+		return true;
+
+	default:
+		break;
+	}
+
+	return false;
+}
+void
+set_pango_fontsize ()
+{
+	long val = ARDOUR::Config->get_font_scale();
+
+	/* FT2 rendering - used by GnomeCanvas, sigh */
+
+	pango_ft2_font_map_set_resolution ((PangoFT2FontMap*) pango_ft2_font_map_for_display(), val/1024, val/1024);
+
+	/* Cairo rendering, in case there is any */
+
+	pango_cairo_font_map_set_resolution ((PangoCairoFontMap*) pango_cairo_font_map_get_default(), val/1024);
+}
+
+void
+reset_dpi ()
+{
+	long val = ARDOUR::Config->get_font_scale();
+	set_pango_fontsize ();
+	/* Xft rendering */
+
+	gtk_settings_set_long_property (gtk_settings_get_default(),
+					"gtk-xft-dpi", val, "ardour");
+	DPIReset();//Emit Signal
+}
+
+bool
+possibly_translate_keyval_to_make_legal_accelerator (uint32_t& keyval)
+{
+	int fakekey = GDK_VoidSymbol;
+
+	switch (keyval) {
+	case GDK_Tab:
+	case GDK_ISO_Left_Tab:
+		fakekey = GDK_nabla;
+		break;
+
+	case GDK_Up:
+		fakekey = GDK_uparrow;
+		break;
+
+	case GDK_Down:
+		fakekey = GDK_downarrow;
+		break;
+
+	case GDK_Right:
+		fakekey = GDK_rightarrow;
+		break;
+
+	case GDK_Left:
+		fakekey = GDK_leftarrow;
+		break;
+
+	default:
+		break;
+	}
+
+	if (fakekey != GDK_VoidSymbol) {
+		keyval = fakekey;
+		return true;
+	}
+
+	return false;
+}
+
+
+inline guint8
+convert_color_channel (guint8 src,
+		       guint8 alpha)
+{
+	return alpha ? ((guint (src) << 8) - src) / alpha : 0;
+}
+
+void
+convert_bgra_to_rgba (guint8 const* src,
+		      guint8*       dst,
+		      int           width,
+		      int           height)
+{
+	guint8 const* src_pixel = src;
+	guint8*       dst_pixel = dst;
+
+	for (int y = 0; y < height; y++)
+		for (int x = 0; x < width; x++)
+		{
+			dst_pixel[0] = convert_color_channel (src_pixel[2],
+							      src_pixel[3]);
+			dst_pixel[1] = convert_color_channel (src_pixel[1],
+							      src_pixel[3]);
+			dst_pixel[2] = convert_color_channel (src_pixel[0],
+							      src_pixel[3]);
+			dst_pixel[3] = src_pixel[3];
+
+			dst_pixel += 4;
+			src_pixel += 4;
+		}
+}
+
+void
+resize_window_to_proportion_of_monitor (Gtk::Window* window, int max_width, int max_height)
+{
+	Glib::RefPtr<Gdk::Screen> screen = window->get_screen ();
+	Gdk::Rectangle monitor_rect;
+	screen->get_monitor_geometry (0, monitor_rect);
+
+	int const w = std::min (monitor_rect.get_width(), max_width) * 0.8;
+	int const h = std::min (monitor_rect.get_height(), max_height) * 0.8;
+
+	window->resize (w, h);
+}