Adjusted when flushing occurs. Now, the BTUI C header file only flushes

the output in a few select cases (mostly entering/leaving TUI mode) and
it's up to the high-level language bindings to decide when to flush
output. Typically, they now only flush output after making visible
changes to the screen.

Lua/lbtui.c

@@ -25,7 +25,6 @@ static int Lbtui_enable(lua_State *L)
     if (bt == NULL) luaL_error(L, "Not a BTUI object");
     *bt = btui_enable();
     btui_move_cursor(*bt, 0, 0);
-    btui_flush(*bt);
     return 0;
 }
 
@@ -131,6 +130,7 @@ static int Lbtui_hidecursor(lua_State *L)
     btui_t **bt = (btui_t**)lua_touserdata(L, 1);
     if (bt == NULL) luaL_error(L, "Not a BTUI object");
     btui_hide_cursor(*bt);
+    btui_flush(*bt);
     return 0;
 }
 
@@ -139,6 +139,7 @@ static int Lbtui_showcursor(lua_State *L)
     btui_t **bt = (btui_t**)lua_touserdata(L, 1);
     if (bt == NULL) luaL_error(L, "Not a BTUI object");
     btui_show_cursor(*bt);
+    btui_flush(*bt);
     return 0;
 }
 
@@ -150,7 +151,6 @@ static int Lbtui_move(lua_State *L)
     int x = (int)luaL_checkinteger(L, 2);
     int y = (int)luaL_checkinteger(L, 3);
     btui_move_cursor(*bt, x, y);
-    btui_flush(*bt);
     return 0;
 }
 
@@ -203,6 +203,7 @@ static int Lbtui_linebox(lua_State *L)
     int w = (int)luaL_checkinteger(L, 4);
     int h = (int)luaL_checkinteger(L, 5);
     btui_draw_linebox(*bt, x, y, w, h);
+    btui_flush(*bt);
     return 0;
 }
 
@@ -215,6 +216,7 @@ static int Lbtui_fillbox(lua_State *L)
     int w = (int)luaL_checkinteger(L, 4);
     int h = (int)luaL_checkinteger(L, 5);
     btui_fill_box(*bt, x, y, w, h);
+    btui_flush(*bt);
     return 0;
 }
 
@@ -227,6 +229,7 @@ static int Lbtui_shadow(lua_State *L)
     int w = (int)luaL_checkinteger(L, 4);
     int h = (int)luaL_checkinteger(L, 5);
     btui_draw_shadow(*bt, x, y, w, h);
+    btui_flush(*bt);
     return 0;
 }
 
@@ -238,6 +241,7 @@ static int Lbtui_scroll(lua_State *L)
     int lastline = (int)luaL_checkinteger(L, 3);
     int scroll = (int)luaL_checkinteger(L, 4);
     btui_scroll(*bt, firstline, lastline, scroll);
+    btui_flush(*bt);
     return 0;
 }
 

Python/btui.py

@@ -123,6 +123,7 @@ class BTUI:
             raise ArgumentError("Not a supported clear type: "+repr(mode))
         clr = ctypes.c_uint.in_dll(libbtui, 'BTUI_CLEAR_' + mode.upper())
         libbtui.btui_clear(self._btui, clr)
+        libbtui.btui_flush(self._btui)
 
     def disable(self):
         libbtui.btui_disable(self._btui)
@@ -136,6 +137,7 @@ class BTUI:
     def draw_shadow(self, x, y, w, h):
         assert self._btui
         libbtui.btui_draw_shadow(self._btui, int(x), int(y), int(w), int(h))
+        libbtui.btui_flush(self._btui)
 
     def enable(self):
         self._btui = libbtui.btui_enable()
@@ -149,6 +151,7 @@ class BTUI:
     def fill_box(self, x, y, w, h):
         assert self._btui
         libbtui.btui_fill_box(self._btui, int(x), int(y), int(w), int(h))
+        libbtui.btui_flush(self._btui)
 
     def flush(self):
         assert self._btui
@@ -179,14 +182,17 @@ class BTUI:
     def hide_cursor(self):
         assert self._btui
         libbtui.btui_hide_cursor(self._btui)
+        libbtui.btui_flush(self._btui)
 
     def show_cursor(self):
         assert self._btui
         libbtui.btui_show_cursor(self._btui)
+        libbtui.btui_flush(self._btui)
 
     def outline_box(self, x, y, w, h):
         assert self._btui
         libbtui.btui_draw_linebox(self._btui, int(x), int(y), int(w), int(h))
+        libbtui.btui_flush(self._btui)
 
     def scroll(self, firstline, lastline=None, amount=None):
         assert self._btui
@@ -194,6 +200,7 @@ class BTUI:
             amount = firstline
             firstline, lastline = 1, self.height
         libbtui.btui_scroll(self._btui, firstline, lastline, amount)
+        libbtui.btui_flush(self._btui)
 
     def set_attributes(self, *attrs):
         assert self._btui
@@ -234,6 +241,7 @@ class BTUI:
     def write_bytes(self, b):
         assert self._btui
         libbtui.btui_puts(self._btui, b)
+        libbtui.btui_flush(self._btui)
 
 
 _btui = BTUI()

btui.h

@@ -399,7 +399,6 @@ void btui_draw_linebox(btui_t *bt, int x, int y, int w, int h)
     for (int i = 0; i < w; i++)
        fputc('q', bt->out);
     fputs("j\033(B", bt->out);
-    fflush(bt->out);
 }
 
 /*
@@ -417,7 +416,6 @@ void btui_draw_shadow(btui_t *bt, int x, int y, int w, int h)
         fputc('a', bt->out);
     }
     fputs("\033(B", bt->out);
-    fflush(bt->out);
 }
 
 /*
@@ -471,7 +469,6 @@ void btui_fill_box(btui_t *bt, int x, int y, int w, int h)
             fputc(' ', bt->out);
         }
     }
-    fflush(bt->out);
 }
 
 /*
@@ -707,7 +704,6 @@ int btui_hide_cursor(btui_t *bt)
 int btui_puts(btui_t *bt, const char *s)
 {
     int ret = fputs(s, bt->out);
-    fflush(bt->out);
     return ret;
 }