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Add live setting of MIDI device from menu

Still WIP

--- a/term_util.c

+++ b/term_util.c

@@ -73,6 +73,7 @@

   MENU* ncurses_menu;

   ITEM* ncurses_items[32];

   Usz items_count;

+  ITEM* initial_item;

   int id;

 };

@@ -299,6 +300,7 @@

   qm->ncurses_menu = NULL;

   qm->ncurses_items[0] = NULL;

   qm->items_count = 0;

+  qm->initial_item = NULL;

   qm->id = id;

   return qm;

 }

@@ -322,6 +324,22 @@

   ++qm->items_count;

   qm->ncurses_items[qm->items_count] = NULL;

 }

+void qmenu_set_current_item(Qmenu* qm, int id) {

+  ITEM* found = NULL;

+  for (Usz i = 0, n = qm->items_count; i < n; i++) {

+    if (item_userptr(qm->ncurses_items[i]) != (void*)(intptr_t)id)

+      continue;

+    found = qm->ncurses_items[i];

+    break;

+  }

+  if (!found)

+    return;

+  if (qm->ncurses_menu) {

+    set_current_item(qm->ncurses_menu, found);

+  } else {

+    qm->initial_item = found;

+  }

+}

 void qmenu_set_displayed_active(Qmenu* qm, bool active) {

   // Could add a flag in the Qmenu to avoid redundantly changing this stuff.

   set_menu_fore(qm->ncurses_menu, active ? A_BOLD : A_DIM);

@@ -350,6 +368,8 @@

     if (title_w > menu_min_w)

       menu_min_w = title_w;

   }

+  if (qm->initial_item)

+    set_current_item(qm->ncurses_menu, qm->initial_item);

   qnav_stack_push(&qm->qblock, menu_min_h, menu_min_w);

   set_menu_win(qm->ncurses_menu, qm->qblock.outer_window);

   set_menu_sub(qm->ncurses_menu, qm->qblock.content_window);

--- a/term_util.h

+++ b/term_util.h

@@ -135,6 +135,7 @@

 void qmenu_set_title(Qmenu* qm, char const* title);

 void qmenu_add_choice(Qmenu* qm, char const* text, int id);

 void qmenu_add_spacer(Qmenu* qm);

+void qmenu_set_current_item(Qmenu* qm, int id);

 void qmenu_set_displayed_active(Qmenu* qm, bool active);

 void qmenu_push_to_nav(Qmenu* qm);

 bool qmenu_drive(Qmenu* qm, int key, Qmenu_action* out_action);

--- a/tui_main.c

+++ b/tui_main.c

@@ -2172,7 +2172,7 @@

 }

 #ifdef FEAT_PORTMIDI

-void push_portmidi_output_device_menu(void) {

+void push_portmidi_output_device_menu(Midi_mode const* midi_mode) {

   Qmenu* qm = qmenu_create(Portmidi_output_device_menu_id);

   qmenu_set_title(qm, "PortMidi Device Selection");

   PmError e = portmidi_init_if_necessary();

@@ -2199,6 +2199,10 @@

                      "No PortMidi output devices found.");

     return;

   }

+  if (midi_mode->any.type == Midi_mode_type_portmidi) {

+    int dev_id = midi_mode->portmidi.device_id;

+    qmenu_set_current_item(qm, dev_id);

+  }

   qmenu_push_to_nav(qm);

 }

 #endif

@@ -2892,7 +2896,7 @@

                 break;

 #ifdef FEAT_PORTMIDI

               case Main_menu_choose_portmidi_output:

-                push_portmidi_output_device_menu();

+                push_portmidi_output_device_menu(&midi_mode);

                 break;

 #endif

               }

@@ -2958,6 +2962,18 @@

               } break;

               }

             }

+#ifdef FEAT_PORTMIDI

+            else if (qmenu_id(qm) == Portmidi_output_device_menu_id) {

+              midi_mode_deinit(&midi_mode);

+              PmError pme = midi_mode_init_portmidi(&midi_mode, act.picked.id);

+              qnav_stack_pop();

+              if (pme) {

+                qmsg_printf_push("PortMidi Error",

+                                 "Error setting PortMidi output device:\n%s",

+                                 Pm_GetErrorText(pme));

+              }

+            }

+#endif

           } break;

           }

         }