Added a way to query if text input is required

src/microui.c

@@ -776,6 +776,10 @@ int mu_textbox_raw(mu_Context *ctx, char *buf, int bufsz, mu_Id id, mu_Rect r,
   mu_update_control(ctx, id, r, opt | MU_OPT_HOLDFOCUS);
 
   if (ctx->focus == id) {
+    ctx->text_edit_enable = 1;
+    ctx->text_edit_last_focus = id;
+    ctx->text_edit_rect = r;
+
     /* handle text input */
     int len = strlen(buf);
     int n = mu_min(bufsz - len - 1, (int) strlen(ctx->input_text));
@@ -797,6 +801,8 @@ int mu_textbox_raw(mu_Context *ctx, char *buf, int bufsz, mu_Id id, mu_Rect r,
       mu_set_focus(ctx, 0);
       res |= MU_RES_SUBMIT;
     }
+  } else if (ctx->text_edit_last_focus == id) {
+    ctx->text_edit_enable = 0;
   }
 
   /* draw */
@@ -805,6 +811,7 @@ int mu_textbox_raw(mu_Context *ctx, char *buf, int bufsz, mu_Id id, mu_Rect r,
     mu_Color color = ctx->style->colors[MU_COLOR_TEXT];
     mu_Font font = ctx->style->font;
     int textw = ctx->text_width(font, buf, -1);
+    ctx->text_edit_cursor_relative_to_rect = textw;
     int texth = ctx->text_height(font);
     int ofx = r.w - ctx->style->padding - textw - 1;
     int textx = r.x + mu_min(ofx, ctx->style->padding);

src/microui.h

@@ -189,6 +189,11 @@ struct mu_Context {
   mu_Container *scroll_target;
   char number_edit_buf[MU_MAX_FMT];
   mu_Id number_edit;
+
+  int text_edit_enable;
+  mu_Id text_edit_last_focus;
+  mu_Rect text_edit_rect;
+  int text_edit_cursor_relative_to_rect;
   /* stacks */
   mu_stack(char, MU_COMMANDLIST_SIZE) command_list;
   mu_stack(mu_Container*, MU_ROOTLIST_SIZE) root_list;