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authorP. J. McDermott <pj@pehjota.net>2021-08-06 00:34:48 (EDT)
committer P. J. McDermott <pj@pehjota.net>2021-08-06 00:59:34 (EDT)
commitab7ea3c8367dad3101a250bfe6873753ba1875b1 (patch)
treec543b82ffc4992291be1bb8026e8cbe24880538d
parentaa8ac0850cb363778577c27b9afc5c2223d7f770 (diff)
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tk: Make event callbacks optional
-rw-r--r--src/tk/button.c3
-rw-r--r--src/tk/check.c3
-rw-r--r--src/tk/radio.c3
3 files changed, 9 insertions, 0 deletions
diff --git a/src/tk/button.c b/src/tk/button.c
index ffac9de..57e505a 100644
--- a/src/tk/button.c
+++ b/src/tk/button.c
@@ -51,6 +51,9 @@ _mftk_button_event(struct mftk_widget *w, SDL_Event *e,
switch (e->type) {
case SDL_MOUSEBUTTONUP:
if (e->button.button == SDL_BUTTON_LEFT) {
+ if (b->action == NULL) {
+ return 0;
+ }
return b->action(b->user_data);
}
break;
diff --git a/src/tk/check.c b/src/tk/check.c
index 6f70dd0..5c73554 100644
--- a/src/tk/check.c
+++ b/src/tk/check.c
@@ -82,6 +82,9 @@ _mftk_check_event(struct mftk_widget *w, SDL_Event *e,
case SDL_MOUSEBUTTONUP:
if (e->button.button == SDL_BUTTON_LEFT) {
c->state = !c->state;
+ if (c->action == NULL) {
+ return 0;
+ }
return c->action(c->user_data, c->state);
}
break;
diff --git a/src/tk/radio.c b/src/tk/radio.c
index 71c9486..27f7d37 100644
--- a/src/tk/radio.c
+++ b/src/tk/radio.c
@@ -53,6 +53,9 @@ _mftk_radio_state_change(void *user_data, int state)
mftk_check_set_state(rs->r->children[rs->r->state], SDL_FALSE);
/* Set and announce new state */
rs->r->state = rs->state;
+ if (rs->r->action == NULL) {
+ return 0;
+ }
return rs->r->action(rs->r->user_data, rs->r->state);
}
}