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Merge pull request #9 from InfiniTimeOrg/fix_screen_off_double_free 

main: fix double free of screen_off_bg lv_obj
main
NeroBurner 2022-03-02 07:40:26 +07:00 committed by GitHub
parent 2b8b4edba3 8bc308b4e1
commit 816210023f
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1 changed files with 13 additions and 0 deletions
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13
main.cpp
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@ -617,6 +617,17 @@ public:
std::cout << "unhandled screen_idx: " << int(screen_idx) << std::endl;
}
}
static void screen_off_delete_cb(lv_obj_t *obj, lv_event_t event)
{
if (event == LV_EVENT_DELETE) {
auto* fw = static_cast<Framework*>(obj->user_data);
if (obj == fw->screen_off_bg)
{
// on delete make sure to not double free the screen_off objects
fw->screen_off_created = false;
}
}
}
// render the current status of the simulated controller
void refresh_screen() {
const Pinetime::Controllers::BrightnessController::Levels level = brightnessController.Level();
@ -627,6 +638,8 @@ public:
lv_obj_set_size(screen_off_bg, 240, 240);
lv_obj_set_pos(screen_off_bg, 0, 0);
lv_obj_set_style_local_bg_color(screen_off_bg, LV_OBJ_PART_MAIN, LV_STATE_DEFAULT, LV_COLOR_BLACK);
screen_off_bg->user_data = this; // add callback to prevent double free through Alarm Screen
lv_obj_set_event_cb(screen_off_bg, screen_off_delete_cb);
screen_off_label = lv_label_create(lv_scr_act(), nullptr);
lv_label_set_text_static(screen_off_label, "Screen is OFF");
lv_obj_align(screen_off_label, nullptr, LV_ALIGN_CENTER, 0, -20);