From 4230ca4e1d0c70e8abbbf128a31a0dfcaf82ef33 Mon Sep 17 00:00:00 2001
From: tlatorre <tlatorre@uchicago.edu>
Date: Sat, 12 Nov 2022 13:42:41 -0600
Subject: switch between alphabets by using spacebar

---
 vito.c | 52 +++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 51 insertions(+), 1 deletion(-)

diff --git a/vito.c b/vito.c
index 273216d..0e1bf20 100644
--- a/vito.c
+++ b/vito.c
@@ -1,6 +1,8 @@
 #include <gtk/gtk.h>
 #include <sys/time.h>
 #include <stdlib.h>
+#include <gdk/gdkkeysyms.h>
+#include <gdk/gdkenums.h>
 
 #define CLICK_TIME 1000
 
@@ -195,7 +197,7 @@ static int released(GtkWidget *widget, gpointer   data)
          * to keep the current letter. The reason is that you might want to
          * delete a whole word and so when you navigate to the backspace you
          * just have to keep entering the same letter. */
-        //current_letter = 0;
+        current_letter = 0;
     } else {
         current_letter += 1;
     }
@@ -205,6 +207,48 @@ static int released(GtkWidget *widget, gpointer   data)
     return TRUE;
 }
 
+gboolean on_key_press(GtkEventControllerKey *, guint keyval, guint keycode, GdkModifierType mod, gpointer user_data)
+{
+    GtkTextBuffer *text_buffer;
+    GtkTextIter start, end;
+    switch (keyval)
+    {
+    case GDK_KEY_space:
+        printf("switching alphabet");
+        if (current_chars == &emoji)
+            current_chars = &alphabet;
+        else if (current_chars == &alphabet)
+            current_chars = &emoji;
+        write_buf();
+        break;
+    case GDK_KEY_BackSpace:
+    case GDK_KEY_Delete:
+        if (current_position > 0) {
+            text_buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text_widget));
+            gtk_text_buffer_set_text(text_buffer, buf, -1);
+
+            gtk_text_buffer_get_iter_at_offset(text_buffer, &start, 0);
+            gtk_text_buffer_get_iter_at_offset(text_buffer, &end, g_utf8_strlen(buf,-1)-2);
+            current_position = strlen(gtk_text_buffer_get_slice(text_buffer,&start,&end,TRUE));
+        }
+        if (current_position > LEN(buf) - 1) {
+            /* FIXME: better way to do this? */
+            current_position = 0;
+        }
+        /* Uncomment the next line to start over at the beginning of the
+         * alphabet after a new letter is entered. But, I think it's better
+         * to keep the current letter. The reason is that you might want to
+         * delete a whole word and so when you navigate to the backspace you
+         * just have to keep entering the same letter. */
+        current_letter = 0;
+        write_buf();
+        break;
+    default:
+      return FALSE; 
+    }
+    return FALSE; 
+}
+
 static void activate(GtkApplication *app, gpointer user_data)
 {
     GtkWidget *window;
@@ -212,11 +256,17 @@ static void activate(GtkApplication *app, gpointer user_data)
     GtkCssProvider *provider;
     GtkStyleContext *context;
     GtkGesture *gesture;
+    GtkEventController *event_controller;
 
     window = gtk_application_window_new(app);
     gtk_window_set_title(GTK_WINDOW(window), "Window");
     gtk_window_set_default_size(GTK_WINDOW(window), 200, 200);
 
+    event_controller = gtk_event_controller_key_new();
+    g_signal_connect(event_controller, "key-pressed", G_CALLBACK(on_key_press), NULL);
+    //gtk_event_controller_set_propagation_phase ((GtkEventController*) event_controller, GTK_PHASE_CAPTURE);
+    gtk_widget_add_controller(window, event_controller);
+
     gesture = gtk_gesture_click_new();
     g_signal_connect(gesture, "pressed", G_CALLBACK(pressed), NULL);
     g_signal_connect(gesture, "released", G_CALLBACK(released), NULL);
-- 
cgit