444 lines
17 KiB
C
444 lines
17 KiB
C
/**
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* @file lv_slider.c
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*
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*/
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/*********************
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* INCLUDES
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*********************/
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#include "lv_slider.h"
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#if LV_USE_SLIDER != 0
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#include "../misc/lv_assert.h"
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#include "../core/lv_group.h"
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#include "../core/lv_indev.h"
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#include "../draw/lv_draw.h"
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#include "../misc/lv_math.h"
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#include "../core/lv_disp.h"
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#include "lv_img.h"
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/*********************
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* DEFINES
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*********************/
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#define MY_CLASS &lv_slider_class
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#define LV_SLIDER_KNOB_COORD(is_rtl, area) (is_rtl ? area.x1 : area.x2)
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/**********************
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* TYPEDEFS
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**********************/
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/**********************
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* STATIC PROTOTYPES
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**********************/
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static void lv_slider_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
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static void lv_slider_event(const lv_obj_class_t * class_p, lv_event_t * e);
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static void position_knob(lv_obj_t * obj, lv_area_t * knob_area, const lv_coord_t knob_size, const bool hor);
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static void draw_knob(lv_event_t * e);
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static bool is_slider_horizontal(lv_obj_t * obj);
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/**********************
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* STATIC VARIABLES
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**********************/
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const lv_obj_class_t lv_slider_class = {
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.constructor_cb = lv_slider_constructor,
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.event_cb = lv_slider_event,
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.editable = LV_OBJ_CLASS_EDITABLE_TRUE,
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.group_def = LV_OBJ_CLASS_GROUP_DEF_TRUE,
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.instance_size = sizeof(lv_slider_t),
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.base_class = &lv_bar_class
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};
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/**********************
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* MACROS
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**********************/
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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lv_obj_t * lv_slider_create(lv_obj_t * parent)
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{
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LV_LOG_INFO("begin");
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lv_obj_t * obj = lv_obj_class_create_obj(MY_CLASS, parent);
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lv_obj_class_init_obj(obj);
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return obj;
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}
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bool lv_slider_is_dragged(const lv_obj_t * obj)
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{
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LV_ASSERT_OBJ(obj, MY_CLASS);
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lv_slider_t * slider = (lv_slider_t *)obj;
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return slider->dragging ? true : false;
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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static void lv_slider_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
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{
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LV_UNUSED(class_p);
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lv_slider_t * slider = (lv_slider_t *)obj;
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/*Initialize the allocated 'slider'*/
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slider->value_to_set = NULL;
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slider->dragging = 0U;
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slider->left_knob_focus = 0U;
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lv_obj_clear_flag(obj, LV_OBJ_FLAG_SCROLL_CHAIN);
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lv_obj_clear_flag(obj, LV_OBJ_FLAG_SCROLLABLE);
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lv_obj_set_ext_click_area(obj, LV_DPX(8));
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}
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static void lv_slider_event(const lv_obj_class_t * class_p, lv_event_t * e)
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{
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LV_UNUSED(class_p);
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lv_res_t res;
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/*Call the ancestor's event handler*/
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res = lv_obj_event_base(MY_CLASS, e);
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if(res != LV_RES_OK) return;
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lv_event_code_t code = lv_event_get_code(e);
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lv_obj_t * obj = lv_event_get_target(e);
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lv_slider_t * slider = (lv_slider_t *)obj;
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lv_slider_mode_t type = lv_slider_get_mode(obj);
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/*Advanced hit testing: react only on dragging the knob(s)*/
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if(code == LV_EVENT_HIT_TEST) {
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lv_hit_test_info_t * info = lv_event_get_param(e);
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lv_coord_t ext_click_area = obj->spec_attr ? obj->spec_attr->ext_click_pad : 0;
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/*Ordinary slider: was the knob area hit?*/
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lv_area_t a;
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lv_area_copy(&a, &slider->right_knob_area);
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lv_area_increase(&a, ext_click_area, ext_click_area);
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info->res = _lv_area_is_point_on(&a, info->point, 0);
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/*There's still a chance that there is a hit if there is another knob*/
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if((info->res == false) && (type == LV_SLIDER_MODE_RANGE)) {
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lv_area_copy(&a, &slider->left_knob_area);
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lv_area_increase(&a, ext_click_area, ext_click_area);
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info->res = _lv_area_is_point_on(&a, info->point, 0);
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}
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}
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else if(code == LV_EVENT_PRESSED) {
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lv_obj_invalidate(obj);
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lv_point_t p;
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slider->dragging = true;
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if(type == LV_SLIDER_MODE_NORMAL || type == LV_SLIDER_MODE_SYMMETRICAL) {
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slider->value_to_set = &slider->bar.cur_value;
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}
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else if(type == LV_SLIDER_MODE_RANGE) {
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lv_indev_get_point(lv_indev_get_act(), &p);
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bool hor = lv_obj_get_width(obj) >= lv_obj_get_height(obj);
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lv_base_dir_t base_dir = lv_obj_get_style_base_dir(obj, LV_PART_MAIN);
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lv_coord_t dist_left, dist_right;
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if(hor) {
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if((base_dir != LV_BASE_DIR_RTL && p.x > slider->right_knob_area.x2) || (base_dir == LV_BASE_DIR_RTL &&
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p.x < slider->right_knob_area.x1)) {
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slider->value_to_set = &slider->bar.cur_value;
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}
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else if((base_dir != LV_BASE_DIR_RTL && p.x < slider->left_knob_area.x1) || (base_dir == LV_BASE_DIR_RTL &&
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p.x > slider->left_knob_area.x2)) {
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slider->value_to_set = &slider->bar.start_value;
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}
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else {
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/*Calculate the distance from each knob*/
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dist_left = LV_ABS((slider->left_knob_area.x1 + (slider->left_knob_area.x2 - slider->left_knob_area.x1) / 2) - p.x);
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dist_right = LV_ABS((slider->right_knob_area.x1 + (slider->right_knob_area.x2 - slider->right_knob_area.x1) / 2) - p.x);
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/*Use whichever one is closer*/
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if(dist_right < dist_left) {
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slider->value_to_set = &slider->bar.cur_value;
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slider->left_knob_focus = 0;
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}
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else {
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slider->value_to_set = &slider->bar.start_value;
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slider->left_knob_focus = 1;
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}
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}
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}
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else {
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if(p.y < slider->right_knob_area.y1) {
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slider->value_to_set = &slider->bar.cur_value;
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}
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else if(p.y > slider->left_knob_area.y2) {
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slider->value_to_set = &slider->bar.start_value;
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}
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else {
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/*Calculate the distance from each knob*/
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dist_left = LV_ABS((slider->left_knob_area.y1 + (slider->left_knob_area.y2 - slider->left_knob_area.y1) / 2) - p.y);
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dist_right = LV_ABS((slider->right_knob_area.y1 + (slider->right_knob_area.y2 - slider->right_knob_area.y1) / 2) - p.y);
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/*Use whichever one is closer*/
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if(dist_right < dist_left) {
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slider->value_to_set = &slider->bar.cur_value;
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slider->left_knob_focus = 0;
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}
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else {
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slider->value_to_set = &slider->bar.start_value;
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slider->left_knob_focus = 1;
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}
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}
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}
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}
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}
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else if(code == LV_EVENT_PRESSING && slider->value_to_set != NULL) {
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lv_indev_t * indev = lv_indev_get_act();
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if(lv_indev_get_type(indev) != LV_INDEV_TYPE_POINTER) return;
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lv_point_t p;
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lv_indev_get_point(indev, &p);
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int32_t new_value = 0;
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const int32_t range = slider->bar.max_value - slider->bar.min_value;
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if(is_slider_horizontal(obj)) {
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const lv_coord_t bg_left = lv_obj_get_style_pad_left(obj, LV_PART_MAIN);
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const lv_coord_t bg_right = lv_obj_get_style_pad_right(obj, LV_PART_MAIN);
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const lv_coord_t w = lv_obj_get_width(obj);
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const lv_coord_t indic_w = w - bg_left - bg_right;
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if(lv_obj_get_style_base_dir(obj, LV_PART_MAIN) == LV_BASE_DIR_RTL) {
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/*Make the point relative to the indicator*/
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new_value = (obj->coords.x2 - bg_right) - p.x;
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}
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else {
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/*Make the point relative to the indicator*/
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new_value = p.x - (obj->coords.x1 + bg_left);
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}
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new_value = (new_value * range) / indic_w;
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new_value += slider->bar.min_value;
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}
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else {
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const lv_coord_t bg_top = lv_obj_get_style_pad_top(obj, LV_PART_MAIN);
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const lv_coord_t bg_bottom = lv_obj_get_style_pad_bottom(obj, LV_PART_MAIN);
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const lv_coord_t h = lv_obj_get_height(obj);
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const lv_coord_t indic_h = h - bg_bottom - bg_top;
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/*Make the point relative to the indicator*/
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new_value = p.y - (obj->coords.y2 + bg_bottom);
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new_value = (-new_value * range) / indic_h;
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new_value += slider->bar.min_value;
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}
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int32_t real_max_value = slider->bar.max_value;
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int32_t real_min_value = slider->bar.min_value;
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/*Figure out the min. and max. for this mode*/
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if(slider->value_to_set == &slider->bar.start_value) {
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real_max_value = slider->bar.cur_value;
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}
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else {
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real_min_value = slider->bar.start_value;
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}
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new_value = LV_CLAMP(real_min_value, new_value, real_max_value);
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if(*slider->value_to_set != new_value) {
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*slider->value_to_set = new_value;
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lv_obj_invalidate(obj);
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res = lv_event_send(obj, LV_EVENT_VALUE_CHANGED, NULL);
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if(res != LV_RES_OK) return;
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}
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}
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else if(code == LV_EVENT_RELEASED || code == LV_EVENT_PRESS_LOST) {
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slider->dragging = false;
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slider->value_to_set = NULL;
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lv_obj_invalidate(obj);
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/*Leave edit mode if released. (No need to wait for LONG_PRESS)*/
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lv_group_t * g = lv_obj_get_group(obj);
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bool editing = lv_group_get_editing(g);
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lv_indev_type_t indev_type = lv_indev_get_type(lv_indev_get_act());
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if(indev_type == LV_INDEV_TYPE_ENCODER) {
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if(editing) {
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if(lv_slider_get_mode(obj) == LV_SLIDER_MODE_RANGE) {
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if(slider->left_knob_focus == 0) slider->left_knob_focus = 1;
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else {
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slider->left_knob_focus = 0;
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lv_group_set_editing(g, false);
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}
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}
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else {
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lv_group_set_editing(g, false);
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}
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}
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}
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}
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else if(code == LV_EVENT_FOCUSED) {
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lv_indev_type_t indev_type = lv_indev_get_type(lv_indev_get_act());
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if(indev_type == LV_INDEV_TYPE_ENCODER || indev_type == LV_INDEV_TYPE_KEYPAD) {
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slider->left_knob_focus = 0;
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}
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}
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else if(code == LV_EVENT_SIZE_CHANGED) {
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lv_obj_refresh_ext_draw_size(obj);
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}
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else if(code == LV_EVENT_REFR_EXT_DRAW_SIZE) {
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lv_coord_t knob_left = lv_obj_get_style_pad_left(obj, LV_PART_KNOB);
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lv_coord_t knob_right = lv_obj_get_style_pad_right(obj, LV_PART_KNOB);
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lv_coord_t knob_top = lv_obj_get_style_pad_top(obj, LV_PART_KNOB);
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lv_coord_t knob_bottom = lv_obj_get_style_pad_bottom(obj, LV_PART_KNOB);
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/*The smaller size is the knob diameter*/
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lv_coord_t zoom = lv_obj_get_style_transform_zoom(obj, LV_PART_KNOB);
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lv_coord_t trans_w = lv_obj_get_style_transform_width(obj, LV_PART_KNOB);
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lv_coord_t trans_h = lv_obj_get_style_transform_height(obj, LV_PART_KNOB);
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lv_coord_t knob_size = LV_MIN(lv_obj_get_width(obj) + 2 * trans_w, lv_obj_get_height(obj) + 2 * trans_h) >> 1;
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knob_size = (knob_size * zoom) >> 8;
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knob_size += LV_MAX(LV_MAX(knob_left, knob_right), LV_MAX(knob_bottom, knob_top));
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knob_size += 2; /*For rounding error*/
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knob_size += lv_obj_calculate_ext_draw_size(obj, LV_PART_KNOB);
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/*Indic. size is handled by bar*/
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lv_coord_t * s = lv_event_get_param(e);
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*s = LV_MAX(*s, knob_size);
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}
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else if(code == LV_EVENT_KEY) {
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char c = *((char *)lv_event_get_param(e));
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if(c == LV_KEY_RIGHT || c == LV_KEY_UP) {
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if(!slider->left_knob_focus) lv_slider_set_value(obj, lv_slider_get_value(obj) + 1, LV_ANIM_ON);
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else lv_slider_set_left_value(obj, lv_slider_get_left_value(obj) + 1, LV_ANIM_ON);
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}
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else if(c == LV_KEY_LEFT || c == LV_KEY_DOWN) {
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if(!slider->left_knob_focus) lv_slider_set_value(obj, lv_slider_get_value(obj) - 1, LV_ANIM_ON);
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else lv_slider_set_left_value(obj, lv_slider_get_left_value(obj) - 1, LV_ANIM_ON);
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}
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else {
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return;
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}
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res = lv_event_send(obj, LV_EVENT_VALUE_CHANGED, NULL);
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if(res != LV_RES_OK) return;
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}
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else if(code == LV_EVENT_DRAW_MAIN) {
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draw_knob(e);
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}
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}
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static void draw_knob(lv_event_t * e)
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{
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lv_obj_t * obj = lv_event_get_target(e);
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lv_slider_t * slider = (lv_slider_t *)obj;
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lv_draw_ctx_t * draw_ctx = lv_event_get_draw_ctx(e);
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const bool is_rtl = LV_BASE_DIR_RTL == lv_obj_get_style_base_dir(obj, LV_PART_MAIN);
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const bool is_horizontal = is_slider_horizontal(obj);
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lv_area_t knob_area;
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lv_coord_t knob_size;
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bool is_symmetrical = false;
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if(slider->bar.mode == LV_BAR_MODE_SYMMETRICAL && slider->bar.min_value < 0 &&
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slider->bar.max_value > 0) is_symmetrical = true;
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if(is_horizontal) {
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knob_size = lv_obj_get_height(obj);
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if(is_symmetrical && slider->bar.cur_value < 0) knob_area.x1 = slider->bar.indic_area.x1;
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else knob_area.x1 = LV_SLIDER_KNOB_COORD(is_rtl, slider->bar.indic_area);
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}
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else {
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knob_size = lv_obj_get_width(obj);
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if(is_symmetrical && slider->bar.cur_value < 0) knob_area.y1 = slider->bar.indic_area.y2;
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else knob_area.y1 = slider->bar.indic_area.y1;
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}
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lv_draw_rect_dsc_t knob_rect_dsc;
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lv_draw_rect_dsc_init(&knob_rect_dsc);
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lv_obj_init_draw_rect_dsc(obj, LV_PART_KNOB, &knob_rect_dsc);
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/* Update knob area with knob style */
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position_knob(obj, &knob_area, knob_size, is_horizontal);
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/* Update right knob area with calculated knob area */
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lv_area_copy(&slider->right_knob_area, &knob_area);
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lv_obj_draw_part_dsc_t part_draw_dsc;
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lv_obj_draw_dsc_init(&part_draw_dsc, draw_ctx);
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part_draw_dsc.part = LV_PART_KNOB;
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part_draw_dsc.class_p = MY_CLASS;
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part_draw_dsc.type = LV_SLIDER_DRAW_PART_KNOB;
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part_draw_dsc.id = 0;
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part_draw_dsc.draw_area = &slider->right_knob_area;
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part_draw_dsc.rect_dsc = &knob_rect_dsc;
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if(lv_slider_get_mode(obj) != LV_SLIDER_MODE_RANGE) {
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lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc);
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lv_draw_rect(draw_ctx, &knob_rect_dsc, &slider->right_knob_area);
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lv_event_send(obj, LV_EVENT_DRAW_PART_END, &part_draw_dsc);
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}
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else {
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/*Save the draw part_draw_dsc. because it can be modified in the event*/
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lv_draw_rect_dsc_t knob_rect_dsc_tmp;
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lv_memcpy(&knob_rect_dsc_tmp, &knob_rect_dsc, sizeof(lv_draw_rect_dsc_t));
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/* Draw the right knob */
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lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc);
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lv_draw_rect(draw_ctx, &knob_rect_dsc, &slider->right_knob_area);
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lv_event_send(obj, LV_EVENT_DRAW_PART_END, &part_draw_dsc);
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/*Calculate the second knob area*/
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if(is_horizontal) {
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/*use !is_rtl to get the other knob*/
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knob_area.x1 = LV_SLIDER_KNOB_COORD(!is_rtl, slider->bar.indic_area);
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}
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else {
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knob_area.y1 = slider->bar.indic_area.y2;
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}
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position_knob(obj, &knob_area, knob_size, is_horizontal);
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lv_area_copy(&slider->left_knob_area, &knob_area);
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lv_memcpy(&knob_rect_dsc, &knob_rect_dsc_tmp, sizeof(lv_draw_rect_dsc_t));
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part_draw_dsc.type = LV_SLIDER_DRAW_PART_KNOB_LEFT;
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part_draw_dsc.draw_area = &slider->left_knob_area;
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part_draw_dsc.rect_dsc = &knob_rect_dsc;
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part_draw_dsc.id = 1;
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lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc);
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lv_draw_rect(draw_ctx, &knob_rect_dsc, &slider->left_knob_area);
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lv_event_send(obj, LV_EVENT_DRAW_PART_END, &part_draw_dsc);
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}
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}
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|
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static void position_knob(lv_obj_t * obj, lv_area_t * knob_area, const lv_coord_t knob_size, const bool hor)
|
|
{
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|
if(hor) {
|
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knob_area->x1 -= (knob_size >> 1);
|
|
knob_area->x2 = knob_area->x1 + knob_size - 1;
|
|
knob_area->y1 = obj->coords.y1;
|
|
knob_area->y2 = obj->coords.y2;
|
|
}
|
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else {
|
|
knob_area->y1 -= (knob_size >> 1);
|
|
knob_area->y2 = knob_area->y1 + knob_size - 1;
|
|
knob_area->x1 = obj->coords.x1;
|
|
knob_area->x2 = obj->coords.x2;
|
|
}
|
|
|
|
lv_coord_t knob_left = lv_obj_get_style_pad_left(obj, LV_PART_KNOB);
|
|
lv_coord_t knob_right = lv_obj_get_style_pad_right(obj, LV_PART_KNOB);
|
|
lv_coord_t knob_top = lv_obj_get_style_pad_top(obj, LV_PART_KNOB);
|
|
lv_coord_t knob_bottom = lv_obj_get_style_pad_bottom(obj, LV_PART_KNOB);
|
|
|
|
lv_coord_t transf_w = lv_obj_get_style_transform_width(obj, LV_PART_KNOB);
|
|
lv_coord_t transf_h = lv_obj_get_style_transform_height(obj, LV_PART_KNOB);
|
|
|
|
/*Apply the paddings on the knob area*/
|
|
knob_area->x1 -= knob_left + transf_w;
|
|
knob_area->x2 += knob_right + transf_w;
|
|
knob_area->y1 -= knob_top + transf_h;
|
|
knob_area->y2 += knob_bottom + transf_h;
|
|
}
|
|
|
|
static bool is_slider_horizontal(lv_obj_t * obj)
|
|
{
|
|
return lv_obj_get_width(obj) >= lv_obj_get_height(obj);
|
|
}
|
|
|
|
#endif
|