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#include "../lv_examples.h"
#if LV_BUILD_EXAMPLES && LV_USE_SLIDER && LV_USE_CHART && LV_USE_BUTTON && LV_USE_GRID
/**
* the example show the use of cubic-bezier3 in animation.
* the control point P1,P2 of cubic-bezier3 can be adjusted by slider.
* and the chart shows the cubic-bezier3 in real time. you can click
* run button see animation in current point of cubic-bezier3.
*/
#define CHART_POINTS_NUM 256
struct {
lv_obj_t * anim_obj;
lv_obj_t * chart;
lv_chart_series_t * ser1;
lv_obj_t * p1_slider;
lv_obj_t * p1_label;
lv_obj_t * p2_slider;
lv_obj_t * p2_label;
lv_obj_t * run_btn;
uint16_t p1;
uint16_t p2;
lv_anim_t a;
} ginfo;
static int32_t anim_path_bezier3_cb(const lv_anim_t * a);
static void refer_chart_cubic_bezier(void);
static void run_button_event_handler(lv_event_t * e);
static void slider_event_cb(lv_event_t * e);
static void page_obj_init(lv_obj_t * par);
static void anim_x_cb(void * var, int32_t v);
/**
* create an animation
*/
void lv_example_anim_3(void)
{
static int32_t col_dsc[] = {LV_GRID_FR(1), 200, LV_GRID_FR(1), LV_GRID_TEMPLATE_LAST};
static int32_t row_dsc[] = {30, 10, 10, LV_GRID_FR(1), LV_GRID_TEMPLATE_LAST};
/*Create a container with grid*/
lv_obj_t * cont = lv_obj_create(lv_screen_active());
lv_obj_set_style_pad_all(cont, 2, LV_PART_MAIN);
lv_obj_set_style_pad_column(cont, 10, LV_PART_MAIN);
lv_obj_set_style_pad_row(cont, 10, LV_PART_MAIN);
lv_obj_set_grid_dsc_array(cont, col_dsc, row_dsc);
lv_obj_set_size(cont, 320, 240);
lv_obj_center(cont);
page_obj_init(cont);
lv_anim_init(&ginfo.a);
lv_anim_set_var(&ginfo.a, ginfo.anim_obj);
int32_t end = lv_obj_get_style_width(cont, LV_PART_MAIN) -
lv_obj_get_style_width(ginfo.anim_obj, LV_PART_MAIN) - 10;
lv_anim_set_values(&ginfo.a, 5, end);
lv_anim_set_duration(&ginfo.a, 2000);
lv_anim_set_exec_cb(&ginfo.a, anim_x_cb);
lv_anim_set_path_cb(&ginfo.a, anim_path_bezier3_cb);
refer_chart_cubic_bezier();
}
static int32_t anim_path_bezier3_cb(const lv_anim_t * a)
{
uint32_t t = lv_map(a->act_time, 0, a->duration, 0, 1024);
int32_t step = lv_bezier3(t, 0, ginfo.p1, ginfo.p2, 1024);
int32_t new_value;
new_value = step * (a->end_value - a->start_value);
new_value = new_value >> 10;
new_value += a->start_value;
return new_value;
}
static void refer_chart_cubic_bezier(void)
{
for(uint16_t i = 0; i <= CHART_POINTS_NUM; i ++) {
uint32_t t = i * (1024 / CHART_POINTS_NUM);
int32_t step = lv_bezier3(t, 0, ginfo.p1, ginfo.p2, 1024);
lv_chart_set_value_by_id2(ginfo.chart, ginfo.ser1, i, t, step);
}
lv_chart_refresh(ginfo.chart);
}
static void anim_x_cb(void * var, int32_t v)
{
lv_obj_set_style_translate_x(var, v, LV_PART_MAIN);
}
static void run_button_event_handler(lv_event_t * e)
{
lv_event_code_t code = lv_event_get_code(e);
if(code == LV_EVENT_CLICKED) {
lv_anim_start(&ginfo.a);
}
}
static void slider_event_cb(lv_event_t * e)
{
char buf[16];
lv_obj_t * label;
lv_obj_t * slider = lv_event_get_target(e);
if(slider == ginfo.p1_slider) {
label = ginfo.p1_label;
ginfo.p1 = lv_slider_get_value(slider);
lv_snprintf(buf, sizeof(buf), "p1:%d", ginfo.p1);
}
else {
label = ginfo.p2_label;
ginfo.p2 = lv_slider_get_value(slider);
lv_snprintf(buf, sizeof(buf), "p2:%d", ginfo.p2);
}
lv_label_set_text(label, buf);
refer_chart_cubic_bezier();
}
static void page_obj_init(lv_obj_t * par)
{
ginfo.anim_obj = lv_obj_create(par);
lv_obj_set_size(ginfo.anim_obj, 30, 30);
lv_obj_set_align(ginfo.anim_obj, LV_ALIGN_TOP_LEFT);
lv_obj_remove_flag(ginfo.anim_obj, LV_OBJ_FLAG_SCROLLABLE);
lv_obj_set_style_bg_color(ginfo.anim_obj, lv_palette_main(LV_PALETTE_RED), LV_PART_MAIN);
lv_obj_set_grid_cell(ginfo.anim_obj, LV_GRID_ALIGN_START, 0, 1, LV_GRID_ALIGN_START, 0, 1);
ginfo.p1_label = lv_label_create(par);
ginfo.p2_label = lv_label_create(par);
lv_label_set_text(ginfo.p1_label, "p1:0");
lv_label_set_text(ginfo.p2_label, "p2:0");
lv_obj_set_grid_cell(ginfo.p1_label, LV_GRID_ALIGN_START, 0, 1, LV_GRID_ALIGN_START, 1, 1);
lv_obj_set_grid_cell(ginfo.p2_label, LV_GRID_ALIGN_START, 0, 1, LV_GRID_ALIGN_START, 2, 1);
ginfo.p1_slider = lv_slider_create(par);
ginfo.p2_slider = lv_slider_create(par);
lv_slider_set_range(ginfo.p1_slider, 0, 1024);
lv_slider_set_range(ginfo.p2_slider, 0, 1024);
lv_obj_set_style_pad_all(ginfo.p1_slider, 2, LV_PART_KNOB);
lv_obj_set_style_pad_all(ginfo.p2_slider, 2, LV_PART_KNOB);
lv_obj_add_event_cb(ginfo.p1_slider, slider_event_cb, LV_EVENT_VALUE_CHANGED, NULL);
lv_obj_add_event_cb(ginfo.p2_slider, slider_event_cb, LV_EVENT_VALUE_CHANGED, NULL);
lv_obj_set_grid_cell(ginfo.p1_slider, LV_GRID_ALIGN_STRETCH, 1, 1, LV_GRID_ALIGN_START, 1, 1);
lv_obj_set_grid_cell(ginfo.p2_slider, LV_GRID_ALIGN_STRETCH, 1, 1, LV_GRID_ALIGN_START, 2, 1);
ginfo.run_btn = lv_button_create(par);
lv_obj_add_event_cb(ginfo.run_btn, run_button_event_handler, LV_EVENT_CLICKED, NULL);
lv_obj_t * btn_label = lv_label_create(ginfo.run_btn);
lv_label_set_text(btn_label, LV_SYMBOL_PLAY);
lv_obj_center(btn_label);
lv_obj_set_grid_cell(ginfo.run_btn, LV_GRID_ALIGN_STRETCH, 2, 1, LV_GRID_ALIGN_STRETCH, 1, 2);
ginfo.chart = lv_chart_create(par);
lv_obj_set_style_pad_all(ginfo.chart, 0, LV_PART_MAIN);
lv_obj_set_style_size(ginfo.chart, 0, 0, LV_PART_INDICATOR);
lv_chart_set_type(ginfo.chart, LV_CHART_TYPE_SCATTER);
ginfo.ser1 = lv_chart_add_series(ginfo.chart, lv_palette_main(LV_PALETTE_RED), LV_CHART_AXIS_PRIMARY_Y);
lv_chart_set_range(ginfo.chart, LV_CHART_AXIS_PRIMARY_Y, 0, 1024);
lv_chart_set_range(ginfo.chart, LV_CHART_AXIS_PRIMARY_X, 0, 1024);
lv_chart_set_point_count(ginfo.chart, CHART_POINTS_NUM);
lv_obj_set_grid_cell(ginfo.chart, LV_GRID_ALIGN_STRETCH, 0, 3, LV_GRID_ALIGN_STRETCH, 3, 1);
}
#endif
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