gtk2_ardour/utils.cc

   1 /*
   2     Copyright (C) 2003 Paul Davis
   3
   4     This program is free software; you an redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <pango/pangoft2.h> // for fontmap resolution control for GnomeCanvas
  21 #include <pango/pangocairo.h> // for fontmap resolution control for GnomeCanvas
  22
  23 #include <cstdlib>
  24 #include <cctype>
  25 #include <fstream>
  26 #include <sys/stat.h>
  27 #include <libart_lgpl/art_misc.h>
  28 #include <gtkmm/rc.h>
  29 #include <gtkmm/window.h>
  30 #include <gtkmm/combo.h>
  31 #include <gtkmm/label.h>
  32 #include <gtkmm/paned.h>
  33 #include <gtk/gtkpaned.h>
  34
  35 #include "pbd/file_utils.h"
  36
  37 #include <gtkmm2ext/utils.h>
  38 #include "ardour/configuration.h"
  39 #include "ardour/rc_configuration.h"
  40
  41 #include "ardour/filesystem_paths.h"
  42
  43 #include "ardour_ui.h"
  44 #include "public_editor.h"
  45 #include "keyboard.h"
  46 #include "utils.h"
  47 #include "i18n.h"
  48 #include "rgb_macros.h"
  49 #include "canvas_impl.h"
  50 #include "gui_thread.h"
  51
  52 using namespace std;
  53 using namespace Gtk;
  54 using namespace Glib;
  55 using namespace PBD;
  56 using Gtkmm2ext::Keyboard;
  57
  58 sigc::signal<void>  DPIReset;
  59
  60 int
  61 pixel_width (const ustring& str, Pango::FontDescription& font)
  62 {
  63         Label foo;
  64         Glib::RefPtr<Pango::Layout> layout = foo.create_pango_layout ("");
  65
  66         layout->set_font_description (font);
  67         layout->set_text (str);
  68
  69         int width, height;
  70         Gtkmm2ext::get_ink_pixel_size (layout, width, height);
  71         return width;
  72 }
  73
  74 ustring
  75 fit_to_pixels (const ustring& str, int pixel_width, Pango::FontDescription& font, int& actual_width, bool with_ellipses)
  76 {
  77         Label foo;
  78         Glib::RefPtr<Pango::Layout> layout = foo.create_pango_layout ("");
  79         ustring::size_type shorter_by = 0;
  80         ustring txt;
  81
  82         layout->set_font_description (font);
  83
  84         actual_width = 0;
  85
  86         ustring ustr = str;
  87         ustring::iterator last = ustr.end();
  88         --last; /* now points at final entry */
  89
  90         txt = ustr;
  91
  92         while (!ustr.empty()) {
  93
  94                 layout->set_text (txt);
  95
  96                 int width, height;
  97                 Gtkmm2ext::get_ink_pixel_size (layout, width, height);
  98
  99                 if (width < pixel_width) {
 100                         actual_width = width;
 101                         break;
 102                 }
 103
 104                 ustr.erase (last--);
 105                 shorter_by++;
 106
 107                 if (with_ellipses && shorter_by > 3) {
 108                         txt = ustr;
 109                         txt += "...";
 110                 } else {
 111                         txt = ustr;
 112                 }
 113         }
 114
 115         return txt;
 116 }
 117
 118 /** Try to fit a string into a given horizontal space by ellipsizing it.
 119  *  @param cr Cairo context in which the text will be plotted.
 120  *  @param name Text.
 121  *  @param avail Available horizontal space.
 122  *  @return (Text, possibly ellipsized) and (horizontal size of text)
 123  */
 124
 125 std::pair<std::string, double>
 126 fit_to_pixels (cairo_t* cr, std::string name, double avail)
 127 {
 128         /* XXX hopefully there exists a more efficient way of doing this */
 129
 130         bool abbreviated = false;
 131         uint32_t width = 0;
 132
 133         while (1) {
 134                 cairo_text_extents_t ext;
 135                 cairo_text_extents (cr, name.c_str(), &ext);
 136
 137                 if (ext.width < avail || name.length() <= 4) {
 138                         width = ext.width;
 139                         break;
 140                 }
 141
 142                 if (abbreviated) {
 143                         name = name.substr (0, name.length() - 4) + "...";
 144                 } else {
 145                         name = name.substr (0, name.length() - 3) + "...";
 146                         abbreviated = true;
 147                 }
 148         }
 149
 150         return std::make_pair (name, width);
 151 }
 152
 153
 154 /** Add an element to a menu, settings its sensitivity.
 155  * @param m Menu to add to.
 156  * @param e Element to add.
 157  * @param s true to make sensitive, false to make insensitive
 158  */
 159 void
 160 add_item_with_sensitivity (Menu_Helpers::MenuList& m, Menu_Helpers::MenuElem e, bool s)
 161 {
 162         m.push_back (e);
 163         if (!s) {
 164                 m.back().set_sensitive (false);
 165         }
 166 }
 167
 168
 169 gint
 170 just_hide_it (GdkEventAny */*ev*/, Gtk::Window *win)
 171 {
 172         win->hide ();
 173         return 0;
 174 }
 175
 176 /* xpm2rgb copied from nixieclock, which bore the legend:
 177
 178     nixieclock - a nixie desktop timepiece
 179     Copyright (C) 2000 Greg Ercolano, erco@3dsite.com
 180
 181     and was released under the GPL.
 182 */
 183
 184 unsigned char*
 185 xpm2rgb (const char** xpm, uint32_t& w, uint32_t& h)
 186 {
 187         static long vals[256], val;
 188         uint32_t t, x, y, colors, cpp;
 189         unsigned char c;
 190         unsigned char *savergb, *rgb;
 191
 192         // PARSE HEADER
 193
 194         if ( sscanf(xpm[0], "%u%u%u%u", &w, &h, &colors, &cpp) != 4 ) {
 195                 error << string_compose (_("bad XPM header %1"), xpm[0])
 196                       << endmsg;
 197                 return 0;
 198         }
 199
 200         savergb = rgb = (unsigned char*) malloc (h * w * 3);
 201
 202         // LOAD XPM COLORMAP LONG ENOUGH TO DO CONVERSION
 203         for (t = 0; t < colors; ++t) {
 204                 sscanf (xpm[t+1], "%c c #%lx", &c, &val);
 205                 vals[c] = val;
 206         }
 207
 208         // COLORMAP -> RGB CONVERSION
 209         //    Get low 3 bytes from vals[]
 210         //
 211
 212         const char *p;
 213         for (y = h-1; y > 0; --y) {
 214
 215                 for (p = xpm[1+colors+(h-y-1)], x = 0; x < w; x++, rgb += 3) {
 216                         val = vals[(int)*p++];
 217                         *(rgb+2) = val & 0xff; val >>= 8;  // 2:B
 218                         *(rgb+1) = val & 0xff; val >>= 8;  // 1:G
 219                         *(rgb+0) = val & 0xff;             // 0:R
 220                 }
 221         }
 222
 223         return (savergb);
 224 }
 225
 226 unsigned char*
 227 xpm2rgba (const char** xpm, uint32_t& w, uint32_t& h)
 228 {
 229         static long vals[256], val;
 230         uint32_t t, x, y, colors, cpp;
 231         unsigned char c;
 232         unsigned char *savergb, *rgb;
 233         char transparent;
 234
 235         // PARSE HEADER
 236
 237         if ( sscanf(xpm[0], "%u%u%u%u", &w, &h, &colors, &cpp) != 4 ) {
 238                 error << string_compose (_("bad XPM header %1"), xpm[0])
 239                       << endmsg;
 240                 return 0;
 241         }
 242
 243         savergb = rgb = (unsigned char*) malloc (h * w * 4);
 244
 245         // LOAD XPM COLORMAP LONG ENOUGH TO DO CONVERSION
 246
 247         if (strstr (xpm[1], "None")) {
 248                 sscanf (xpm[1], "%c", &transparent);
 249                 t = 1;
 250         } else {
 251                 transparent = 0;
 252                 t = 0;
 253         }
 254
 255         for (; t < colors; ++t) {
 256                 sscanf (xpm[t+1], "%c c #%lx", &c, &val);
 257                 vals[c] = val;
 258         }
 259
 260         // COLORMAP -> RGB CONVERSION
 261         //    Get low 3 bytes from vals[]
 262         //
 263
 264         const char *p;
 265         for (y = h-1; y > 0; --y) {
 266
 267                 char alpha;
 268
 269                 for (p = xpm[1+colors+(h-y-1)], x = 0; x < w; x++, rgb += 4) {
 270
 271                         if (transparent && (*p++ == transparent)) {
 272                                 alpha = 0;
 273                                 val = 0;
 274                         } else {
 275                                 alpha = 255;
 276                                 val = vals[(int)*p];
 277                         }
 278
 279                         *(rgb+3) = alpha;                  // 3: alpha
 280                         *(rgb+2) = val & 0xff; val >>= 8;  // 2:B
 281                         *(rgb+1) = val & 0xff; val >>= 8;  // 1:G
 282                         *(rgb+0) = val & 0xff;             // 0:R
 283                 }
 284         }
 285
 286         return (savergb);
 287 }
 288
 289 ArdourCanvas::Points*
 290 get_canvas_points (string /*who*/, uint32_t npoints)
 291 {
 292         // cerr << who << ": wants " << npoints << " canvas points" << endl;
 293 #ifdef TRAP_EXCESSIVE_POINT_REQUESTS
 294         if (npoints > (uint32_t) gdk_screen_width() + 4) {
 295                 abort ();
 296         }
 297 #endif
 298         return new ArdourCanvas::Points (npoints);
 299 }
 300
 301 Pango::FontDescription*
 302 get_font_for_style (string widgetname)
 303 {
 304         Gtk::Window window (WINDOW_TOPLEVEL);
 305         Gtk::Label foobar;
 306         Glib::RefPtr<Gtk::Style> style;
 307
 308         window.add (foobar);
 309         foobar.set_name (widgetname);
 310         foobar.ensure_style();
 311
 312         style = foobar.get_style ();
 313
 314         Glib::RefPtr<const Pango::Layout> layout = foobar.get_layout();
 315
 316         PangoFontDescription *pfd = (PangoFontDescription *)pango_layout_get_font_description((PangoLayout *)layout->gobj());
 317
 318         if (!pfd) {
 319
 320                 /* layout inherited its font description from a PangoContext */
 321
 322                 PangoContext* ctxt = (PangoContext*) pango_layout_get_context ((PangoLayout*) layout->gobj());
 323                 pfd =  pango_context_get_font_description (ctxt);
 324                 return new Pango::FontDescription (pfd, true); /* make a copy */
 325         }
 326
 327         return new Pango::FontDescription (pfd, true); /* make a copy */
 328 }
 329
 330 uint32_t
 331 rgba_from_style (string style, uint32_t r, uint32_t g, uint32_t b, uint32_t a, string attr, int state, bool rgba)
 332 {
 333         /* In GTK+2, styles aren't set up correctly if the widget is not
 334            attached to a toplevel window that has a screen pointer.
 335         */
 336
 337         static Gtk::Window* window = 0;
 338
 339         if (window == 0) {
 340                 window = new Window (WINDOW_TOPLEVEL);
 341         }
 342
 343         Gtk::Label foo;
 344
 345         window->add (foo);
 346
 347         foo.set_name (style);
 348         foo.ensure_style ();
 349
 350         GtkRcStyle* waverc = foo.get_style()->gobj()->rc_style;
 351
 352         if (waverc) {
 353                 if (attr == "fg") {
 354                         r = waverc->fg[state].red / 257;
 355                         g = waverc->fg[state].green / 257;
 356                         b = waverc->fg[state].blue / 257;
 357
 358                         /* what a hack ... "a" is for "active" */
 359                         if (state == Gtk::STATE_NORMAL && rgba) {
 360                                 a = waverc->fg[GTK_STATE_ACTIVE].red / 257;
 361                         }
 362                 } else if (attr == "bg") {
 363                         r = g = b = 0;
 364                         r = waverc->bg[state].red / 257;
 365                         g = waverc->bg[state].green / 257;
 366                         b = waverc->bg[state].blue / 257;
 367                 } else if (attr == "base") {
 368                         r = waverc->base[state].red / 257;
 369                         g = waverc->base[state].green / 257;
 370                         b = waverc->base[state].blue / 257;
 371                 } else if (attr == "text") {
 372                         r = waverc->text[state].red / 257;
 373                         g = waverc->text[state].green / 257;
 374                         b = waverc->text[state].blue / 257;
 375                 }
 376         } else {
 377                 warning << string_compose (_("missing RGBA style for \"%1\""), style) << endl;
 378         }
 379
 380         window->remove ();
 381
 382         if (state == Gtk::STATE_NORMAL && rgba) {
 383                 return (uint32_t) RGBA_TO_UINT(r,g,b,a);
 384         } else {
 385                 return (uint32_t) RGB_TO_UINT(r,g,b);
 386         }
 387 }
 388
 389
 390 Gdk::Color
 391 color_from_style (string widget_style_name, int state, string attr)
 392 {
 393         GtkStyle* style;
 394
 395         style = gtk_rc_get_style_by_paths (gtk_settings_get_default(),
 396                                            widget_style_name.c_str(),
 397                                            0, G_TYPE_NONE);
 398
 399         if (!style) {
 400                 error << string_compose (_("no style found for %1, using red"), style) << endmsg;
 401                 return Gdk::Color ("red");
 402         }
 403
 404         if (attr == "fg") {
 405                 return Gdk::Color (&style->fg[state]);
 406         }
 407
 408         if (attr == "bg") {
 409                 return Gdk::Color (&style->bg[state]);
 410         }
 411
 412         if (attr == "light") {
 413                 return Gdk::Color (&style->light[state]);
 414         }
 415
 416         if (attr == "dark") {
 417                 return Gdk::Color (&style->dark[state]);
 418         }
 419
 420         if (attr == "mid") {
 421                 return Gdk::Color (&style->mid[state]);
 422         }
 423
 424         if (attr == "text") {
 425                 return Gdk::Color (&style->text[state]);
 426         }
 427
 428         if (attr == "base") {
 429                 return Gdk::Color (&style->base[state]);
 430         }
 431
 432         if (attr == "text_aa") {
 433                 return Gdk::Color (&style->text_aa[state]);
 434         }
 435
 436         error << string_compose (_("unknown style attribute %1 requested for color; using \"red\""), attr) << endmsg;
 437         return Gdk::Color ("red");
 438 }
 439
 440 Glib::RefPtr<Gdk::GC>
 441 gc_from_style (string widget_style_name, int state, string attr)
 442 {
 443         GtkStyle* style;
 444
 445         style = gtk_rc_get_style_by_paths (gtk_settings_get_default(),
 446                                            widget_style_name.c_str(),
 447                                            0, G_TYPE_NONE);
 448
 449         if (!style) {
 450                 error << string_compose (_("no style found for %1, using red"), style) << endmsg;
 451                 Glib::RefPtr<Gdk::GC> ret = Gdk::GC::create();
 452                 ret->set_rgb_fg_color(Gdk::Color("red"));
 453                 return ret;
 454         }
 455
 456         if (attr == "fg") {
 457                 return Glib::wrap(style->fg_gc[state]);
 458         }
 459
 460         if (attr == "bg") {
 461                 return Glib::wrap(style->bg_gc[state]);
 462         }
 463
 464         if (attr == "light") {
 465                 return Glib::wrap(style->light_gc[state]);
 466         }
 467
 468         if (attr == "dark") {
 469                 return Glib::wrap(style->dark_gc[state]);
 470         }
 471
 472         if (attr == "mid") {
 473                 return Glib::wrap(style->mid_gc[state]);
 474         }
 475
 476         if (attr == "text") {
 477                 return Glib::wrap(style->text_gc[state]);
 478         }
 479
 480         if (attr == "base") {
 481                 return Glib::wrap(style->base_gc[state]);
 482         }
 483
 484         if (attr == "text_aa") {
 485                 return Glib::wrap(style->text_aa_gc[state]);
 486         }
 487
 488         error << string_compose (_("unknown style attribute %1 requested for color; using \"red\""), attr) << endmsg;
 489         Glib::RefPtr<Gdk::GC> ret = Gdk::GC::create();
 490         ret->set_rgb_fg_color(Gdk::Color("red"));
 491         return ret;
 492 }
 493
 494
 495 bool
 496 canvas_item_visible (ArdourCanvas::Item* item)
 497 {
 498         return (item->gobj()->object.flags & GNOME_CANVAS_ITEM_VISIBLE) ? true : false;
 499 }
 500
 501 void
 502 set_color (Gdk::Color& c, int rgb)
 503 {
 504         c.set_rgb((rgb >> 16)*256, ((rgb & 0xff00) >> 8)*256, (rgb & 0xff)*256);
 505 }
 506
 507 bool
 508 relay_key_press (GdkEventKey* ev, Gtk::Window* win)
 509 {
 510         if (!key_press_focus_accelerator_handler (*win, ev)) {
 511                 return PublicEditor::instance().on_key_press_event(ev);
 512         } else {
 513                 return true;
 514         }
 515 }
 516
 517 bool
 518 forward_key_press (GdkEventKey* ev)
 519 {
 520         return PublicEditor::instance().on_key_press_event(ev);
 521 }
 522
 523 #ifdef GTKOSX
 524 static guint
 525 osx_keyval_without_alt (guint accent_keyval)
 526 {
 527         switch (accent_keyval) {
 528         case GDK_oe:
 529                 return GDK_q;
 530         case GDK_registered:
 531                 return GDK_r;
 532         case GDK_dagger:
 533                 return GDK_t;
 534         case GDK_yen:
 535                 return GDK_y;
 536         case GDK_diaeresis:
 537                 return GDK_u;
 538         case GDK_oslash:
 539                 return GDK_o;
 540         case GDK_Greek_pi:
 541                 return GDK_p;
 542         case GDK_leftdoublequotemark:
 543                 return GDK_bracketleft;
 544         case GDK_leftsinglequotemark:
 545                 return GDK_bracketright;
 546         case GDK_guillemotleft:
 547                 return GDK_backslash;
 548         case GDK_aring:
 549                 return GDK_a;
 550         case GDK_ssharp:
 551                 return GDK_s;
 552         case GDK_partialderivative:
 553                 return GDK_d;
 554         case GDK_function:
 555                 return GDK_f;
 556         case GDK_copyright:
 557                 return GDK_g;
 558         case GDK_abovedot:
 559                 return GDK_h;
 560         case GDK_notsign:
 561                 return GDK_l;
 562         case GDK_ellipsis:
 563                 return GDK_semicolon;
 564         case GDK_ae:
 565                 return GDK_apostrophe;
 566         case GDK_Greek_OMEGA:
 567                 return GDK_z;
 568         case GDK_ccedilla:
 569                 return GDK_c;
 570         case GDK_radical:
 571                 return GDK_v;
 572         case GDK_integral:
 573                 return GDK_b;
 574         case GDK_mu:
 575                 return GDK_m;
 576         case GDK_lessthanequal:
 577                 return GDK_comma;
 578         case GDK_greaterthanequal:
 579                 return GDK_period;
 580         case GDK_division:
 581                 return GDK_slash;
 582         default:
 583                 break;
 584         }
 585
 586         return GDK_VoidSymbol;
 587 }
 588 #endif
 589
 590 bool
 591 key_press_focus_accelerator_handler (Gtk::Window& window, GdkEventKey* ev)
 592 {
 593         GtkWindow* win = window.gobj();
 594         GtkWidget* focus = gtk_window_get_focus (win);
 595         bool special_handling_of_unmodified_accelerators = false;
 596         bool allow_activating = true;
 597
 598 #undef DEBUG_ACCELERATOR_HANDLING
 599 #ifdef  DEBUG_ACCELERATOR_HANDLING
 600         //bool debug = (getenv ("ARDOUR_DEBUG_ACCELERATOR_HANDLING") != 0);
 601         bool debug=true;
 602 #endif
 603         if (focus) {
 604                 if (GTK_IS_ENTRY(focus) || Keyboard::some_magic_widget_has_focus()) {
 605                         special_handling_of_unmodified_accelerators = true;
 606                 }
 607         }
 608
 609 #ifdef GTKOSX
 610         /* should this be universally true? */
 611         if (Keyboard::some_magic_widget_has_focus ()) {
 612                 allow_activating = false;
 613         }
 614 #endif
 615
 616 #ifdef DEBUG_ACCELERATOR_HANDLING
 617         if (debug) {
 618                 cerr << "Win = " << win << " Key event: code = " << ev->keyval << " state = " << hex << ev->state << dec << " special handling ? "
 619                      << special_handling_of_unmodified_accelerators
 620                      << " magic widget focus ? "
 621                      << Keyboard::some_magic_widget_has_focus()
 622                      << " allow_activation ? "
 623                      << allow_activating
 624                      << endl;
 625         }
 626 #endif
 627
 628         /* This exists to allow us to override the way GTK handles
 629            key events. The normal sequence is:
 630
 631            a) event is delivered to a GtkWindow
 632            b) accelerators/mnemonics are activated
 633            c) if (b) didn't handle the event, propagate to
 634                the focus widget and/or focus chain
 635
 636            The problem with this is that if the accelerators include
 637            keys without modifiers, such as the space bar or the
 638            letter "e", then pressing the key while typing into
 639            a text entry widget results in the accelerator being
 640            activated, instead of the desired letter appearing
 641            in the text entry.
 642
 643            There is no good way of fixing this, but this
 644            represents a compromise. The idea is that
 645            key events involving modifiers (not Shift)
 646            get routed into the activation pathway first, then
 647            get propagated to the focus widget if necessary.
 648
 649            If the key event doesn't involve modifiers,
 650            we deliver to the focus widget first, thus allowing
 651            it to get "normal text" without interference
 652            from acceleration.
 653
 654            Of course, this can also be problematic: if there
 655            is a widget with focus, then it will swallow
 656            all "normal text" accelerators.
 657         */
 658
 659 #ifdef GTKOSX
 660         if (!special_handling_of_unmodified_accelerators) {
 661                 if (ev->state & GDK_MOD1_MASK) {
 662                         /* we're not in a text entry or "magic focus" widget so we don't want OS X "special-character"
 663                            text-style handling of alt-<key>. change the keyval back to what it would be without
 664                            the alt key. this way, we see <alt>-v rather than <alt>-radical and so on.
 665                         */
 666                         guint keyval_without_alt = osx_keyval_without_alt (ev->keyval);
 667
 668                         if (keyval_without_alt != GDK_VoidSymbol) {
 669 #ifdef DEBUG_ACCELERATOR_HANDLING
 670                                 cerr << "Remapped " << gdk_keyval_name (ev->keyval) << " to " << gdk_keyval_name (keyval_without_alt) << endl;
 671
 672 #endif                          ev->keyval = keyval_without_alt;
 673                         }
 674                 }
 675         }
 676 #endif
 677
 678         if (!special_handling_of_unmodified_accelerators) {
 679
 680                 /* pretend that certain key events that GTK does not allow
 681                    to be used as accelerators are actually something that
 682                    it does allow.
 683                 */
 684
 685                 uint32_t fakekey = ev->keyval;
 686
 687                 if (Gtkmm2ext::possibly_translate_keyval_to_make_legal_accelerator (fakekey)) {
 688                         if (allow_activating && gtk_accel_groups_activate(G_OBJECT(win), fakekey, GdkModifierType(ev->state))) {
 689                                 return true;
 690                         }
 691                 }
 692         }
 693
 694         /* consider all relevant modifiers but not LOCK or SHIFT */
 695
 696         guint mask = (Keyboard::RelevantModifierKeyMask & ~(Gdk::SHIFT_MASK|Gdk::LOCK_MASK));
 697
 698         if (!special_handling_of_unmodified_accelerators || (ev->state & mask)) {
 699
 700                 /* no special handling or there are modifiers in effect: accelerate first */
 701
 702 #ifdef DEBUG_ACCELERATOR_HANDLING
 703                 if (debug) {
 704                         cerr << "\tactivate, then propagate\n";
 705                 }
 706 #endif
 707
 708                 if (allow_activating) {
 709                         if (gtk_window_activate_key (win, ev)) {
 710                                 return true;
 711                         }
 712                 }
 713
 714 #ifdef DEBUG_ACCELERATOR_HANDLING
 715                 if (debug) {
 716                         cerr << "\tnot accelerated, now propagate\n";
 717                 }
 718 #endif
 719                 return gtk_window_propagate_key_event (win, ev);
 720         }
 721
 722         /* no modifiers, propagate first */
 723
 724 #ifdef DEBUG_ACCELERATOR_HANDLING
 725         if (debug) {
 726                 cerr << "\tpropagate, then activate\n";
 727         }
 728 #endif
 729         if (!gtk_window_propagate_key_event (win, ev)) {
 730 #ifdef DEBUG_ACCELERATOR_HANDLING
 731                 if (debug) {
 732                         cerr << "\tpropagation didn't handle, so activate\n";
 733                 }
 734 #endif
 735
 736                 if (allow_activating) {
 737                         return gtk_window_activate_key (win, ev);
 738                 }
 739
 740         } else {
 741 #ifdef DEBUG_ACCELERATOR_HANDLING
 742                 if (debug) {
 743                         cerr << "\thandled by propagate\n";
 744                 }
 745 #endif
 746                 return true;
 747         }
 748
 749 #ifdef DEBUG_ACCELERATOR_HANDLING
 750         if (debug) {
 751                 cerr << "\tnot handled\n";
 752         }
 753 #endif
 754         return true;
 755 }
 756
 757 Glib::RefPtr<Gdk::Pixbuf>
 758 get_xpm (std::string name)
 759 {
 760         if (!xpm_map[name]) {
 761
 762                 SearchPath spath(ARDOUR::ardour_search_path());
 763                 spath += ARDOUR::system_data_search_path();
 764
 765                 spath.add_subdirectory_to_paths("pixmaps");
 766
 767                 sys::path data_file_path;
 768
 769                 if(!find_file_in_search_path (spath, name, data_file_path)) {
 770                         fatal << string_compose (_("cannot find XPM file for %1"), name) << endmsg;
 771                 }
 772
 773                 try {
 774                         xpm_map[name] =  Gdk::Pixbuf::create_from_file (data_file_path.to_string());
 775                 } catch(const Glib::Error& e)   {
 776                         warning << "Caught Glib::Error: " << e.what() << endmsg;
 777                 }
 778         }
 779
 780         return xpm_map[name];
 781 }
 782
 783 Glib::ustring
 784 get_icon_path (const char* cname)
 785 {
 786         string name = cname;
 787         name += X_(".png");
 788
 789         SearchPath spath(ARDOUR::ardour_search_path());
 790         spath += ARDOUR::system_data_search_path();
 791
 792         spath.add_subdirectory_to_paths("icons");
 793
 794         sys::path data_file_path;
 795
 796         if (!find_file_in_search_path (spath, name, data_file_path)) {
 797                 fatal << string_compose (_("cannot find icon image for %1"), name) << endmsg;
 798         }
 799
 800         return data_file_path.to_string();
 801 }
 802
 803 Glib::RefPtr<Gdk::Pixbuf>
 804 get_icon (const char* cname)
 805 {
 806         Glib::RefPtr<Gdk::Pixbuf> img;
 807         try {
 808                 img = Gdk::Pixbuf::create_from_file (get_icon_path (cname));
 809         } catch (const Gdk::PixbufError &e) {
 810                 cerr << "Caught PixbufError: " << e.what() << endl;
 811         } catch (...) {
 812                 g_message("Caught ... ");
 813         }
 814
 815         return img;
 816 }
 817
 818 string
 819 longest (vector<string>& strings)
 820 {
 821         if (strings.empty()) {
 822                 return string ("");
 823         }
 824
 825         vector<string>::iterator longest = strings.begin();
 826         string::size_type longest_length = (*longest).length();
 827
 828         vector<string>::iterator i = longest;
 829         ++i;
 830
 831         while (i != strings.end()) {
 832
 833                 string::size_type len = (*i).length();
 834
 835                 if (len > longest_length) {
 836                         longest = i;
 837                         longest_length = len;
 838                 }
 839
 840                 ++i;
 841         }
 842
 843         return *longest;
 844 }
 845
 846 bool
 847 key_is_legal_for_numeric_entry (guint keyval)
 848 {
 849         switch (keyval) {
 850         case GDK_minus:
 851         case GDK_plus:
 852         case GDK_period:
 853         case GDK_comma:
 854         case GDK_0:
 855         case GDK_1:
 856         case GDK_2:
 857         case GDK_3:
 858         case GDK_4:
 859         case GDK_5:
 860         case GDK_6:
 861         case GDK_7:
 862         case GDK_8:
 863         case GDK_9:
 864         case GDK_KP_Add:
 865         case GDK_KP_Subtract:
 866         case GDK_KP_Decimal:
 867         case GDK_KP_0:
 868         case GDK_KP_1:
 869         case GDK_KP_2:
 870         case GDK_KP_3:
 871         case GDK_KP_4:
 872         case GDK_KP_5:
 873         case GDK_KP_6:
 874         case GDK_KP_7:
 875         case GDK_KP_8:
 876         case GDK_KP_9:
 877         case GDK_Return:
 878         case GDK_BackSpace:
 879         case GDK_Delete:
 880         case GDK_KP_Enter:
 881         case GDK_Home:
 882         case GDK_End:
 883         case GDK_Left:
 884         case GDK_Right:
 885                 return true;
 886
 887         default:
 888                 break;
 889         }
 890
 891         return false;
 892 }
 893 void
 894 set_pango_fontsize ()
 895 {
 896         long val = ARDOUR::Config->get_font_scale();
 897
 898         /* FT2 rendering - used by GnomeCanvas, sigh */
 899
 900         pango_ft2_font_map_set_resolution ((PangoFT2FontMap*) pango_ft2_font_map_for_display(), val/1024, val/1024);
 901
 902         /* Cairo rendering, in case there is any */
 903
 904         pango_cairo_font_map_set_resolution ((PangoCairoFontMap*) pango_cairo_font_map_get_default(), val/1024);
 905 }
 906
 907 void
 908 reset_dpi ()
 909 {
 910         long val = ARDOUR::Config->get_font_scale();
 911         set_pango_fontsize ();
 912         /* Xft rendering */
 913
 914         gtk_settings_set_long_property (gtk_settings_get_default(),
 915                                         "gtk-xft-dpi", val, "ardour");
 916         DPIReset();//Emit Signal
 917 }
 918
 919
 920
 921 inline guint8
 922 convert_color_channel (guint8 src,
 923                        guint8 alpha)
 924 {
 925         return alpha ? ((guint (src) << 8) - src) / alpha : 0;
 926 }
 927
 928 void
 929 convert_bgra_to_rgba (guint8 const* src,
 930                       guint8*       dst,
 931                       int           width,
 932                       int           height)
 933 {
 934         guint8 const* src_pixel = src;
 935         guint8*       dst_pixel = dst;
 936
 937         for (int y = 0; y < height; y++)
 938                 for (int x = 0; x < width; x++)
 939                 {
 940                         dst_pixel[0] = convert_color_channel (src_pixel[2],
 941                                                               src_pixel[3]);
 942                         dst_pixel[1] = convert_color_channel (src_pixel[1],
 943                                                               src_pixel[3]);
 944                         dst_pixel[2] = convert_color_channel (src_pixel[0],
 945                                                               src_pixel[3]);
 946                         dst_pixel[3] = src_pixel[3];
 947
 948                         dst_pixel += 4;
 949                         src_pixel += 4;
 950                 }
 951 }
 952
 953 void
 954 resize_window_to_proportion_of_monitor (Gtk::Window* window, int max_width, int max_height)
 955 {
 956         Glib::RefPtr<Gdk::Screen> screen = window->get_screen ();
 957         Gdk::Rectangle monitor_rect;
 958         screen->get_monitor_geometry (0, monitor_rect);
 959
 960         int const w = std::min (monitor_rect.get_width(), max_width) * 0.8;
 961         int const h = std::min (monitor_rect.get_height(), max_height) * 0.8;
 962
 963         window->resize (w, h);
 964 }
 965
 966 Glib::RefPtr<Gdk::Pixbuf>
 967 pixbuf_from_ustring(const ustring& name, Pango::FontDescription* font, int clip_width, int clip_height, Gdk::Color fg)
 968 {
 969         static Glib::RefPtr<Gdk::Pixbuf>* empty_pixbuf = 0;
 970
 971         if (name.empty()) {
 972                 if (empty_pixbuf == 0) {
 973                         empty_pixbuf = new Glib::RefPtr<Gdk::Pixbuf>;
 974                         *empty_pixbuf = Gdk::Pixbuf::create(Gdk::COLORSPACE_RGB, true, 8, clip_width, clip_height);
 975                 }
 976                 return *empty_pixbuf;
 977         }
 978
 979         Glib::RefPtr<Gdk::Pixbuf> buf = Gdk::Pixbuf::create(Gdk::COLORSPACE_RGB, true, 8, clip_width, clip_height);
 980
 981         cairo_surface_t* surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, clip_width, clip_height);
 982         cairo_t* cr = cairo_create (surface);
 983         cairo_text_extents_t te;
 984
 985         cairo_set_source_rgba (cr, fg.get_red_p(), fg.get_green_p(), fg.get_blue_p(), 1.0);
 986         cairo_select_font_face (cr, font->get_family().c_str(),
 987                                 CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
 988         cairo_set_font_size (cr,  font->get_size() / Pango::SCALE);
 989         cairo_text_extents (cr, name.c_str(), &te);
 990
 991         cairo_move_to (cr, 0.5, 0.5 - te.height / 2 - te.y_bearing + clip_height / 2);
 992         cairo_show_text (cr, name.c_str());
 993
 994         convert_bgra_to_rgba(cairo_image_surface_get_data (surface), buf->get_pixels(), clip_width, clip_height);
 995
 996         cairo_destroy(cr);
 997         cairo_surface_destroy(surface);
 998
 999         return buf;
1000 }
1001
1002 /** Replace _ with __ in a string; for use with menu item text to make underscores displayed correctly */
1003 string
1004 escape_underscores (string const & s)
1005 {
1006         string o;
1007         string::size_type const N = s.length ();
1008
1009         for (string::size_type i = 0; i < N; ++i) {
1010                 if (s[i] == '_') {
1011                         o += "__";
1012                 } else {
1013                         o += s[i];
1014                 }
1015         }
1016
1017         return o;
1018 }
1019
1020 static void
1021 adjustment_to_controllable (Gtk::Adjustment* adj, boost::weak_ptr<Controllable> wcont)
1022 {
1023         boost::shared_ptr<Controllable> cont = wcont.lock();
1024
1025         if (cont) {
1026                 double val = adj->get_value();
1027                 if (val != cont->get_value()) {
1028                         cont->set_value (val);
1029                 }
1030         }
1031 }
1032
1033 static void
1034 controllable_to_adjustment (Gtk::Adjustment* adj, boost::weak_ptr<Controllable> wcont)
1035 {
1036         boost::shared_ptr<Controllable> cont = wcont.lock();
1037
1038         if (cont) {
1039                 float val = cont->get_value();
1040
1041                 if (val != adj->get_value()) {
1042                         adj->set_value (val);
1043                 }
1044         }
1045 }
1046
1047 void
1048 control_link (ScopedConnectionList& scl, boost::shared_ptr<Controllable> c, Gtk::Adjustment& a)
1049 {
1050         boost::weak_ptr<Controllable> wc (c);
1051
1052         a.signal_value_changed().connect (sigc::bind (sigc::ptr_fun (adjustment_to_controllable), &a, wc));
1053         c->Changed.connect (scl, MISSING_INVALIDATOR, boost::bind (controllable_to_adjustment, &a, wc),
1054                             gui_context());
1055 }
1056