mirror of
https://github.com/lvgl/lvgl.git
synced 2026-05-10 12:47:51 +08:00
Mutahhar Mustafa Khan
69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
#include "../lv_examples.h"
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#if LV_BUILD_EXAMPLES && LV_USE_SWITCH
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static void anim_x_cb(void * var, int32_t v)
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{
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lv_obj_set_x((lv_obj_t *) var, v);
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}
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static void timer_cb(lv_timer_t * timer)
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{
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lv_anim_t * anim = (lv_anim_t *) lv_timer_get_user_data(timer);
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lv_anim_pause_for(anim, 1000);
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lv_timer_delete(timer);
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}
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static void sw_event_cb(lv_event_t * e)
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{
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lv_obj_t * sw = lv_event_get_target_obj(e);
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lv_obj_t * label = (lv_obj_t *) lv_event_get_user_data(e);
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if(lv_obj_has_state(sw, LV_STATE_CHECKED)) {
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lv_anim_t a;
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lv_anim_init(&a);
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lv_anim_set_var(&a, label);
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lv_anim_set_values(&a, lv_obj_get_x(label), 100);
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lv_anim_set_duration(&a, 500);
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lv_anim_set_exec_cb(&a, anim_x_cb);
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lv_anim_set_path_cb(&a, lv_anim_path_overshoot);
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lv_timer_create(timer_cb, 200, lv_anim_start(&a));
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}
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else {
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lv_anim_t a;
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lv_anim_init(&a);
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lv_anim_set_var(&a, label);
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lv_anim_set_values(&a, lv_obj_get_x(label), -lv_obj_get_width(label));
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lv_anim_set_duration(&a, 500);
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lv_anim_set_exec_cb(&a, anim_x_cb);
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lv_anim_set_path_cb(&a, lv_anim_path_ease_in);
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lv_timer_create(timer_cb, 200, lv_anim_start(&a));
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}
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}
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/**
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* @title Pause a running animation
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* @brief Pause a label slide for one second shortly after it starts.
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*
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* A label and a pre-checked switch are placed on the active screen. When
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* the switch's `LV_EVENT_VALUE_CHANGED` fires, an `lv_anim_t` slides the
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* label to x=100 with `lv_anim_path_overshoot` on check or to `-width`
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* with `lv_anim_path_ease_in` on uncheck, each 500 ms long. After starting
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* the animation a 200 ms `lv_timer_t` calls `lv_anim_pause_for` to hold
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* it for 1000 ms before it resumes.
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*/
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void lv_example_anim_4(void)
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{
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lv_obj_t * label = lv_label_create(lv_screen_active());
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lv_label_set_text(label, "Hello animations!");
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lv_obj_set_pos(label, 100, 10);
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lv_obj_t * sw = lv_switch_create(lv_screen_active());
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lv_obj_center(sw);
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lv_obj_add_state(sw, LV_STATE_CHECKED);
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lv_obj_add_event_cb(sw, sw_event_cb, LV_EVENT_VALUE_CHANGED, label);
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}
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#endif
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