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#include "../../lv_examples.h"
#if LV_USE_BUTTONMATRIX && LV_BUILD_EXAMPLES
static void event_cb(lv_event_t * e)
{
lv_obj_t * obj = lv_event_get_target(e);
lv_draw_task_t * draw_task = lv_event_get_draw_task(e);
lv_draw_dsc_base_t * base_dsc = lv_draw_task_get_draw_dsc(draw_task);
/*When the button matrix draws the buttons...*/
if(base_dsc->part == LV_PART_ITEMS) {
bool pressed = false;
if(lv_buttonmatrix_get_selected_button(obj) == base_dsc->id1 && lv_obj_has_state(obj, LV_STATE_PRESSED)) {
pressed = true;
}
/*Change the draw descriptor of the 2nd button*/
if(base_dsc->id1 == 1) {
lv_draw_fill_dsc_t * fill_draw_dsc = lv_draw_task_get_fill_dsc(draw_task);
if(fill_draw_dsc) {
fill_draw_dsc->radius = 0;
if(pressed) fill_draw_dsc->color = lv_palette_darken(LV_PALETTE_BLUE, 3);
else fill_draw_dsc->color = lv_palette_main(LV_PALETTE_BLUE);
}
lv_draw_box_shadow_dsc_t * box_shadow_draw_dsc = lv_draw_task_get_box_shadow_dsc(draw_task);
if(box_shadow_draw_dsc) {
box_shadow_draw_dsc->width = 6;
box_shadow_draw_dsc->ofs_x = 3;
box_shadow_draw_dsc->ofs_y = 3;
}
lv_draw_label_dsc_t * label_draw_dsc = lv_draw_task_get_label_dsc(draw_task);
if(label_draw_dsc) {
label_draw_dsc->color = lv_color_white();
}
}
/*Change the draw descriptor of the 3rd button*/
else if(base_dsc->id1 == 2) {
lv_draw_fill_dsc_t * fill_draw_dsc = lv_draw_task_get_fill_dsc(draw_task);
if(fill_draw_dsc) {
fill_draw_dsc->radius = LV_RADIUS_CIRCLE;
if(pressed) fill_draw_dsc->color = lv_palette_darken(LV_PALETTE_RED, 3);
else fill_draw_dsc->color = lv_palette_main(LV_PALETTE_RED);
}
}
else if(base_dsc->id1 == 3) {
lv_draw_label_dsc_t * label_draw_dsc = lv_draw_task_get_label_dsc(draw_task);
if(label_draw_dsc) {
label_draw_dsc->opa = 0;
}
if(lv_draw_task_get_type(draw_task) == LV_DRAW_TASK_TYPE_FILL) {
LV_IMAGE_DECLARE(img_star);
lv_image_header_t header;
lv_result_t res = lv_image_decoder_get_info(&img_star, &header);
if(res != LV_RESULT_OK) return;
lv_area_t a;
a.x1 = 0;
a.x2 = header.w - 1;
a.y1 = 0;
a.y2 = header.h - 1;
lv_area_t draw_task_area;
lv_draw_task_get_area(draw_task, &draw_task_area);
lv_area_align(&draw_task_area, &a, LV_ALIGN_CENTER, 0, 0);
lv_draw_image_dsc_t img_draw_dsc;
lv_draw_image_dsc_init(&img_draw_dsc);
img_draw_dsc.src = &img_star;
img_draw_dsc.recolor = lv_color_black();
if(pressed) img_draw_dsc.recolor_opa = LV_OPA_30;
lv_draw_image(base_dsc->layer, &img_draw_dsc, &a);
}
}
}
}
/**
* Add custom drawer to the button matrix to customize buttons one by one
*/
void lv_example_buttonmatrix_2(void)
{
lv_obj_t * btnm = lv_buttonmatrix_create(lv_screen_active());
lv_obj_add_event_cb(btnm, event_cb, LV_EVENT_DRAW_TASK_ADDED, NULL);
lv_obj_add_flag(btnm, LV_OBJ_FLAG_SEND_DRAW_TASK_EVENTS);
lv_obj_center(btnm);
}
#endif
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