[window] more structured way of doing 'demo drawing'

src/ax.h

@@ -57,6 +57,8 @@ void ax_set_window_size(
 
 int ax_select_window(struct ax_ctxt* ax, struct ax_window* win);
 
+int ax_show_demo(struct ax_ctxt* ax);
+
 /* -----------------------------------------------------------------------------
  * Cursor
  * -------------------------------------------------------------------------- */

src/ctxt/ctxt.c

@@ -252,6 +252,23 @@ int ax_select_window(struct ax_ctxt* ax, struct ax_window* win)
     return 0;
 }
 
+int ax_show_demo(struct ax_ctxt* ax)
+{
+    if (ax->sel_win == NULL) {
+        ax->err = "no window slected";
+        return 1;
+    }
+    if (ax->sel_thm == NULL) {
+        ax->err = "no theme slected";
+        return 1;
+    }
+    log_writelnf(ax->root_lg,
+                 "drawing demo graphics (win=%p, thm=%p)",
+                 ax->sel_win, ax->sel_thm);
+    ax__window_draw_demo(ax->sel_win, ax->sel_thm);
+    return 0;
+}
+
 /* -----------------------------------------------------------------------------
  * Backend worker thread
  * -------------------------------------------------------------------------- */

src/ctxt/window.c

@@ -2,6 +2,7 @@
 #include "../concurrent/msg.h"
 #include "../concurrent/msgq.h"
 #include "../geom/graphics.h"
+#include "../ctxt/theme.h"
 
 static inline const char* default_title(struct rgn* rgn)
 {
@@ -25,8 +26,6 @@ struct ax_window_builder* ax__window_builder_new(struct rgn* rgn)
     return winb;
 }
 
-static void draw_demo(struct ax_graphics* gr);
-
 struct ax_window* ax__window_builder_finish(
     struct ax_window_builder* winb,
     struct rgn* dst_rgn,
@@ -37,7 +36,7 @@ struct ax_window* ax__window_builder_finish(
     pthread_mutex_init(&win->mx, NULL);
     rgn_pin(dst_rgn, &win->mx, (void*) pthread_mutex_destroy);
     win->graphics = ax__graphics_new(dst_rgn);
-    draw_demo(win->graphics);
+    // draw_demo(win->graphics);
 
     struct ax_msg_make_window* m =
         msgq_begin_send_typed(req_window_mq, ax_msg_make_window);
@@ -51,8 +50,11 @@ struct ax_window* ax__window_builder_finish(
     return win;
 }
 
-static void draw_demo(struct ax_graphics* gr)
+void ax__window_draw_demo(
+    struct ax_window* win,
+    struct ax_theme* thm)
 {
+    struct ax_graphics* gr = win->graphics;
     struct ax_glyph* g;
 
     ax__graphics_clear(gr, 0xffffff);

src/ctxt/window.h

@@ -7,6 +7,7 @@
 
 struct msgq;
 struct ax_backend;
+struct ax_theme;
 struct ax_graphics;
 
 #define WINDOW_BUILDER_DESIRED_REGION_SIZE SMALL
@@ -61,3 +62,7 @@ static inline void ax__window_set_flag(
         winb->flags &= ~((int) f);
     }
 }
+
+void ax__window_draw_demo(
+    struct ax_window* win,
+    struct ax_theme* thm);

test/main.c

@@ -69,6 +69,7 @@ int main(void)
 
     GUARD(ax_select_theme(ax, thm));
     GUARD(ax_select_window(ax, win));
+    GUARD(ax_show_demo(ax));
 
     struct sub* ev_sub = ax__backend_sub_events(ax->bac, rgn);
     for (bool quit = false; !quit; ) {