ncmultiselect demo

include/notcurses/notcurses.h

@@ -2269,7 +2269,6 @@ API const char* ncselector_nextitem(struct ncselector* n);
 //  * a mouse click on an item
 //  * a mouse scrollwheel event
 //  * a mouse click on the scrolling arrows
-//  * a mouse click outside of an unrolled menu (the menu is rolled up)
 //  * up, down, pgup, or pgdown on an unrolled menu (navigates among items)
 API bool ncselector_offer_input(struct ncselector* n, const struct ncinput* nc);
 
@@ -2314,10 +2313,19 @@ typedef struct multiselector_options {
 struct ncmultiselector;
 
 API struct ncmultiselector* ncmultiselector_create(struct ncplane* n, int y, int x,
-                                                   const selector_options* opts);
+                                                   const multiselector_options* opts);
 
 // FIXME
 
+// Offer the input to the ncmultiselector. If it's relevant, this function
+// returns true, and the input ought not be processed further. If it's
+// irrelevant to the multiselector, false is returned. Relevant inputs include:
+//  * a mouse click on an item
+//  * a mouse scrollwheel event
+//  * a mouse click on the scrolling arrows
+//  * up, down, pgup, or pgdown on an unrolled menu (navigates among items)
+API bool ncmultiselector_offer_input(struct ncmultiselector* n, const struct ncinput* nc);
+
 // Destroy the ncmultiselector.
 API void ncmultiselector_destroy(struct ncmultiselector* n, char** item);
 

src/poc/multiselect.c

@@ -0,0 +1,128 @@
+#include <stdio.h>
+#include <string.h>
+#include <locale.h>
+#include <stdlib.h>
+#include <notcurses/notcurses.h>
+
+static struct selector_item items[] = {
+  { "first", "this is the first option", },
+  { "2nd", "this is the second option", },
+  { "3", "third, third, third option am i", },
+  { "fourth", "i have another option here", },
+  { "five", "golden rings", },
+  { "666", "now it is time for me to REIGN IN BLOOD", },
+  { "7seven7", "this monkey's gone to heaven", },
+  { "8 8 8", "the chinese 平仮名平平仮名仮名love me, i'm told", },
+  { "nine", "nine, nine, nine 'cause you left me", },
+  { "ten", "stunning and brave", },
+};
+
+static void
+run_mselect(struct notcurses* nc, struct ncmultiselector* ns){
+  static int item = 0;
+  ++item;
+  if(ns == NULL){
+    notcurses_stop(nc);
+    fprintf(stderr, "Error creating selector %d\n", item);
+    exit(EXIT_FAILURE);
+  }
+  notcurses_render(nc);
+  char32_t keypress;
+  ncinput ni;
+  while((keypress = notcurses_getc_blocking(nc, &ni)) != (char32_t)-1){
+    if(!ncmultiselector_offer_input(ns, &ni)){
+      switch(keypress){
+        case NCKEY_ENTER: ncmultiselector_destroy(ns, NULL); return;
+        case 'M': case 'J': if(ni.ctrl){ ncmultiselector_destroy(ns, NULL); return; }
+      }
+      if(keypress == 'q'){
+        break;
+      }
+    }
+    notcurses_render(nc);
+  }
+  ncmultiselector_destroy(ns, NULL);
+}
+
+int main(void){
+  if(!setlocale(LC_ALL, "")){
+    return EXIT_FAILURE;
+  }
+  notcurses_options opts;
+  memset(&opts, 0, sizeof(opts));
+  struct notcurses* nc = notcurses_init(&opts, stdout);
+  if(nc == NULL){
+    return EXIT_FAILURE;
+  }
+  if(notcurses_mouse_enable(nc)){
+    notcurses_stop(nc);
+    return EXIT_FAILURE;
+  }
+  multiselector_options sopts;
+  memset(&sopts, 0, sizeof(sopts));
+  sopts.maxdisplay = 4;
+  sopts.items = items;
+  sopts.itemcount = sizeof(items) / sizeof(*items);
+  sopts.title = "this is truly, absolutely an awfully long example of a selector title";
+  sopts.secondary = "pick one (you will die regardless)";
+  sopts.footer = "press q to exit (there is no exit)";
+  channels_set_fg(&sopts.boxchannels, 0x20e040);
+  channels_set_fg(&sopts.opchannels, 0xe08040);
+  channels_set_fg(&sopts.descchannels, 0x80e040);
+  channels_set_bg(&sopts.opchannels, 0);
+  channels_set_bg(&sopts.descchannels, 0);
+  channels_set_fg(&sopts.footchannels, 0xe00040);
+  channels_set_fg(&sopts.titlechannels, 0xffff80);
+  channels_set_fg(&sopts.bgchannels, 0x002000);
+  channels_set_bg(&sopts.bgchannels, 0x002000);
+  channels_set_fg_alpha(&sopts.bgchannels, CELL_ALPHA_BLEND);
+  channels_set_bg_alpha(&sopts.bgchannels, CELL_ALPHA_BLEND);
+  struct ncplane* n = notcurses_stdplane(nc);
+
+  int averr;
+  struct ncvisual* ncv = ncplane_visual_open(n, "../data/changes.jpg", &averr);
+  if(!ncv){
+    goto err;
+  }
+  if(!ncvisual_decode(ncv, &averr)){
+    goto err;
+  }
+  if(ncvisual_render(ncv, 0, 0, 0, 0)){
+    goto err;
+  }
+
+  ncplane_set_fg(n, 0x40f040);
+  ncplane_putstr_aligned(n, 0, NCALIGN_RIGHT, "multiselect widget demo");
+  struct ncmultiselector* ns = ncmultiselector_create(n, 3, 0, &sopts);
+  run_mselect(nc, ns);
+
+  sopts.title = "short round title";
+  ns = ncmultiselector_create(n, 3, 0, &sopts);
+  run_mselect(nc, ns);
+
+  sopts.title = "short round title";
+  sopts.secondary = "now this secondary is also very, very, very outlandishly long, you see";
+  ns = ncmultiselector_create(n, 3, 0, &sopts);
+  run_mselect(nc, ns);
+
+  sopts.title = "the whole world is watching";
+  sopts.secondary = NULL;
+  sopts.footer = "now this FOOTERFOOTER is also very, very, very outlandishly long, you see";
+  ns = ncmultiselector_create(n, 3, 0, &sopts);
+  run_mselect(nc, ns);
+
+  sopts.title = "chomps";
+  sopts.secondary = NULL;
+  sopts.footer = NULL;
+  ns = ncmultiselector_create(n, 3, 0, &sopts);
+  run_mselect(nc, ns);
+
+  if(notcurses_stop(nc)){
+    return EXIT_FAILURE;
+  }
+  return EXIT_SUCCESS;
+
+err:
+  notcurses_stop(nc);
+  return EXIT_FAILURE;
+}