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lvgl/lv_core/lv_indev.c
Gabor Kiss-Vamosi cafdce69fe add LV_PROTECT_CLICK_FOCUS
2018-09-03 15:45:12 +02:00

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/**
* @file lv_indev_proc.c
*
*/
/*********************
* INCLUDES
********************/
#include "lv_indev.h"
#include "../lv_hal/lv_hal_tick.h"
#include "../lv_core/lv_group.h"
#include "../lv_core/lv_refr.h"
#include "../lv_misc/lv_task.h"
#include "../lv_misc/lv_math.h"
#include "../lv_draw/lv_draw_rbasic.h"
#include "lv_obj.h"
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
#if LV_INDEV_READ_PERIOD != 0
static void indev_proc_task(void * param);
static void indev_pointer_proc(lv_indev_t * i, lv_indev_data_t * data);
static void indev_keypad_proc(lv_indev_t * i, lv_indev_data_t * data);
static void indev_button_proc(lv_indev_t * i, lv_indev_data_t * data);
static void indev_proc_press(lv_indev_proc_t * proc);
static void indev_proc_release(lv_indev_proc_t * proc);
static void indev_proc_reset_query_handler(lv_indev_t * indev);
static lv_obj_t * indev_search_obj(const lv_indev_proc_t * indev, lv_obj_t * obj);
static void indev_drag(lv_indev_proc_t * state);
static void indev_drag_throw(lv_indev_proc_t * state);
#endif
/**********************
* STATIC VARIABLES
**********************/
static lv_indev_t * indev_act;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Initialize the display input device subsystem
*/
void lv_indev_init(void)
{
#if LV_INDEV_READ_PERIOD != 0
lv_task_create(indev_proc_task, LV_INDEV_READ_PERIOD, LV_TASK_PRIO_MID, NULL);
#endif
lv_indev_reset(NULL); /*Reset all input devices*/
}
/**
* Get the currently processed input device. Can be used in action functions too.
* @return pointer to the currently processed input device or NULL if no input device processing right now
*/
lv_indev_t * lv_indev_get_act(void)
{
return indev_act;
}
/**
* Get the type of an input device
* @param indev pointer to an input device
* @return the type of the input device from `lv_hal_indev_type_t` (`LV_INDEV_TYPE_...`)
*/
lv_hal_indev_type_t lv_indev_get_type(const lv_indev_t * indev)
{
if(indev == NULL) return LV_INDEV_TYPE_NONE;
return indev->driver.type;
}
/**
* Reset one or all input devices
* @param indev pointer to an input device to reset or NULL to reset all of them
*/
void lv_indev_reset(lv_indev_t * indev)
{
if(indev) indev->proc.reset_query = 1;
else {
lv_indev_t * i = lv_indev_next(NULL);
while(i) {
i->proc.reset_query = 1;
i = lv_indev_next(i);
}
}
}
/**
* Reset the long press state of an input device
* @param indev pointer to an input device
*/
void lv_indev_reset_lpr(lv_indev_t * indev)
{
indev->proc.long_pr_sent = 0;
indev->proc.longpr_rep_timestamp = lv_tick_get();
indev->proc.pr_timestamp = lv_tick_get();
}
/**
* Enable input devices device by type
* @param type Input device type
* @param enable true: enable this type; false: disable this type
*/
void lv_indev_enable(lv_hal_indev_type_t type, bool enable)
{
lv_indev_t * i = lv_indev_next(NULL);
while(i) {
if(i->driver.type == type) i->proc.disabled = enable == false ? 1 : 0;
i = lv_indev_next(i);
}
}
/**
* Set a cursor for a pointer input device (for LV_INPUT_TYPE_POINTER and LV_INPUT_TYPE_BUTTON)
* @param indev pointer to an input device
* @param cur_obj pointer to an object to be used as cursor
*/
void lv_indev_set_cursor(lv_indev_t * indev, lv_obj_t * cur_obj)
{
if(indev->driver.type != LV_INDEV_TYPE_POINTER && indev->driver.type != LV_INDEV_TYPE_BUTTON) return;
indev->cursor = cur_obj;
lv_obj_set_parent(indev->cursor, lv_layer_sys());
lv_obj_set_pos(indev->cursor, indev->proc.act_point.x, indev->proc.act_point.y);
}
#if USE_LV_GROUP
/**
* Set a destination group for a keypad input device (for LV_INDEV_TYPE_KEYPAD)
* @param indev pointer to an input device
* @param group point to a group
*/
void lv_indev_set_group(lv_indev_t * indev, lv_group_t * group)
{
if(indev->driver.type == LV_INDEV_TYPE_KEYPAD) indev->group = group;
}
#endif
/**
* Set the an array of points for LV_INDEV_TYPE_BUTTON.
* These points will be assigned to the buttons to press a specific point on the screen
* @param indev pointer to an input device
* @param group point to a group
*/
void lv_indev_set_button_points(lv_indev_t * indev, lv_point_t * points)
{
if(indev->driver.type == LV_INDEV_TYPE_BUTTON) indev->btn_points = points;
}
/**
* Get the last point of an input device (for LV_INDEV_TYPE_POINTER and LV_INDEV_TYPE_BUTTON)
* @param indev pointer to an input device
* @param point pointer to a point to store the result
*/
void lv_indev_get_point(const lv_indev_t * indev, lv_point_t * point)
{
if(indev->driver.type != LV_INDEV_TYPE_POINTER && indev->driver.type != LV_INDEV_TYPE_BUTTON) {
point->x = -1;
point->y = -1;
} else {
point->x = indev->proc.act_point.x;
point->y = indev->proc.act_point.y;
}
}
/**
* Get the last key of an input device (for LV_INDEV_TYPE_KEYPAD)
* @param indev pointer to an input device
* @return the last pressed key (0 on error)
*/
uint32_t lv_indev_get_key(const lv_indev_t * indev)
{
if(indev->driver.type != LV_INDEV_TYPE_KEYPAD) return 0;
else return indev->proc.last_key;
}
/**
* Check if there is dragging with an input device or not (for LV_INDEV_TYPE_POINTER and LV_INDEV_TYPE_BUTTON)
* @param indev pointer to an input device
* @return true: drag is in progress
*/
bool lv_indev_is_dragging(const lv_indev_t * indev)
{
if(indev == NULL) return false;
if(indev->driver.type != LV_INDEV_TYPE_POINTER && indev->driver.type != LV_INDEV_TYPE_BUTTON) return false;
return indev->proc.drag_in_prog == 0 ? false : true;
}
/**
* Get the vector of dragging of an input device (for LV_INDEV_TYPE_POINTER and LV_INDEV_TYPE_BUTTON)
* @param indev pointer to an input device
* @param point pointer to a point to store the vector
*/
void lv_indev_get_vect(const lv_indev_t * indev, lv_point_t * point)
{
if(indev->driver.type != LV_INDEV_TYPE_POINTER && indev->driver.type != LV_INDEV_TYPE_BUTTON) {
point->x = 0;
point->y = 0;
} else {
point->x = indev->proc.vect.x;
point->y = indev->proc.vect.y;
}
}
/**
* Get elapsed time since last press
* @param indev pointer to an input device (NULL to get the overall smallest inactivity)
* @return Elapsed ticks (milliseconds) since last press
*/
uint32_t lv_indev_get_inactive_time(const lv_indev_t * indev)
{
uint32_t t;
if(indev) return t = lv_tick_elaps(indev->last_activity_time);
lv_indev_t * i;
t = UINT16_MAX;
i = lv_indev_next(NULL);
while(i) {
t = LV_MATH_MIN(t, lv_tick_elaps(i->last_activity_time));
i = lv_indev_next(i);
}
return t;
}
/**
* Do nothing until the next release
* @param indev pointer to an input device
*/
void lv_indev_wait_release(lv_indev_t * indev)
{
indev->proc.wait_unil_release = 1;
}
/**********************
* STATIC FUNCTIONS
**********************/
#if LV_INDEV_READ_PERIOD != 0
/**
* Called periodically to handle the input devices
* @param param unused
*/
static void indev_proc_task(void * param)
{
(void)param;
LV_LOG_TRACE("indev task started");
lv_indev_data_t data;
lv_indev_t * i;
i = lv_indev_next(NULL);
/*Read and process all indevs*/
while(i) {
indev_act = i;
/*Handle reset query before processing the point*/
indev_proc_reset_query_handler(i);
if(i->proc.disabled == 0) {
bool more_to_read;
do {
/*Read the data*/
more_to_read = lv_indev_read(i, &data);
indev_proc_reset_query_handler(i); /*The active object might deleted even in the read function*/
i->proc.state = data.state;
if(i->proc.state == LV_INDEV_STATE_PR) {
i->last_activity_time = lv_tick_get();
}
if(i->driver.type == LV_INDEV_TYPE_POINTER) {
indev_pointer_proc(i, &data);
} else if(i->driver.type == LV_INDEV_TYPE_KEYPAD) {
indev_keypad_proc(i, &data);
} else if(i->driver.type == LV_INDEV_TYPE_BUTTON) {
indev_button_proc(i, &data);
}
/*Handle reset query if it happened in during processing*/
indev_proc_reset_query_handler(i);
} while(more_to_read);
}
i = lv_indev_next(i); /*Go to the next indev*/
}
indev_act = NULL; /*End of indev processing, so no act indev*/
LV_LOG_TRACE("indev task finished");
}
/**
* Process a new point from LV_INDEV_TYPE_POINTER input device
* @param i pointer to an input device
* @param data pointer to the data read from the input device
*/
static void indev_pointer_proc(lv_indev_t * i, lv_indev_data_t * data)
{
/*Move the cursor if set and moved*/
if(i->cursor != NULL &&
(i->proc.last_point.x != data->point.x ||
i->proc.last_point.y != data->point.y)) {
lv_obj_set_pos(i->cursor, data->point.x, data->point.y);
}
i->proc.act_point.x = data->point.x;
i->proc.act_point.y = data->point.y;
if(i->proc.state == LV_INDEV_STATE_PR) {
#if LV_INDEV_POINT_MARKER != 0
lv_area_t area;
area.x1 = i->proc.act_point.x - (LV_INDEV_POINT_MARKER >> 1);
area.y1 = i->proc.act_point.y - (LV_INDEV_POINT_MARKER >> 1);
area.x2 = i->proc.act_point.x + ((LV_INDEV_POINT_MARKER >> 1) | 0x1);
area.y2 = i->proc.act_point.y + ((LV_INDEV_POINT_MARKER >> 1) | 0x1);
lv_rfill(&area, NULL, LV_COLOR_MAKE(0xFF, 0, 0), LV_OPA_COVER);
#endif
indev_proc_press(&i->proc);
} else {
indev_proc_release(&i->proc);
}
i->proc.last_point.x = i->proc.act_point.x;
i->proc.last_point.y = i->proc.act_point.y;
}
/**
* Process a new point from LV_INDEV_TYPE_KEYPAD input device
* @param i pointer to an input device
* @param data pointer to the data read from the input device
*/
static void indev_keypad_proc(lv_indev_t * i, lv_indev_data_t * data)
{
#if USE_LV_GROUP
if(i->group == NULL) return;
/*Key press happened*/
if(data->state == LV_INDEV_STATE_PR &&
i->proc.last_state == LV_INDEV_STATE_REL) {
i->proc.pr_timestamp = lv_tick_get();
}
/*Pressing*/
else if(data->state == LV_INDEV_STATE_PR && i->proc.last_state == LV_INDEV_STATE_PR) {
if(data->key == LV_GROUP_KEY_ENTER &&
i->proc.long_pr_sent == 0 &&
lv_tick_elaps(i->proc.pr_timestamp) > LV_INDEV_LONG_PRESS_TIME )
{
/*If edit mode is enabled and the focused obejct is editable then change between edit and navigate on long press*/
lv_obj_t * focused = lv_group_get_focused(i->group);
bool editable = false;
focused->signal_func(focused, LV_SIGNAL_GET_EDITABLE, &editable);
if (i->group->edit_mode_en && editable) {
i->group->editing = i->group->editing ? 0 : 1;
LV_LOG_INFO("Edit mode changed");
if(focused) lv_obj_invalidate(focused);
}
/*If edit mode is disabled just send a long press signal*/
else {
focused->signal_func(focused, LV_SIGNAL_LONG_PRESS, indev_act);
}
i->proc.long_pr_sent = 1;
}
}
/*Release happened*/
else if(data->state == LV_INDEV_STATE_REL && i->proc.last_state == LV_INDEV_STATE_PR) {
/*The user might clear the key when it was released. Always release the pressed key*/
data->key = i->proc.last_key;
if((data->key == LV_GROUP_KEY_NEXT) ||
((i->group->edit_mode_en && i->group->editing == 0) &&
(data->key == LV_GROUP_KEY_RIGHT || data->key == LV_GROUP_KEY_DOWN)))
{
lv_group_focus_next(i->group);
}
else if((data->key == LV_GROUP_KEY_PREV) ||
((i->group->edit_mode_en && i->group->editing == 0) &&
(data->key == LV_GROUP_KEY_LEFT || data->key == LV_GROUP_KEY_UP)))
{
lv_group_focus_prev(i->group);
}
else if(data->key == LV_GROUP_KEY_ENTER && i->group->edit_mode_en)
{
lv_obj_t * focused = lv_group_get_focused(i->group);
bool editable = false;
focused->signal_func(focused, LV_SIGNAL_GET_EDITABLE, &editable);
/* If an ENTER is released but not long pressed and we are in edit mode or the object is not editable then send the ENTER
* In navigate mode to editable objects and after releasing the long press to change mode do not send ENTER*/
if(!i->proc.long_pr_sent && (i->group->editing || !editable)) {
lv_group_send_data(i->group, data->key);
}
} else {
lv_group_send_data(i->group, data->key);
}
if(i->proc.reset_query) return; /*The object might be deleted in `focus_cb` or due to any other user event*/
i->proc.pr_timestamp = 0;
i->proc.long_pr_sent = 0;
}
i->proc.last_state = data->state;
i->proc.last_key = data->key;
#endif
}
/**
* Process new points from a input device. indev->state.pressed has to be set
* @param indev pointer to an input device state
* @param x x coordinate of the next point
* @param y y coordinate of the next point
*/
static void indev_button_proc(lv_indev_t * i, lv_indev_data_t * data)
{
i->proc.act_point.x = i->btn_points[data->btn].x;
i->proc.act_point.y = i->btn_points[data->btn].y;
/*Still the same point is pressed*/
if(i->proc.last_point.x == i->proc.act_point.x &&
i->proc.last_point.y == i->proc.act_point.y &&
data->state == LV_INDEV_STATE_PR) {
#if LV_INDEV_POINT_MARKER != 0
lv_area_t area;
area.x1 = i->proc.act_point.x - (LV_INDEV_POINT_MARKER >> 1);
area.y1 = i->proc.act_point.y - (LV_INDEV_POINT_MARKER >> 1);
area.x2 = i->proc.act_point.x + ((LV_INDEV_POINT_MARKER >> 1) | 0x1);
area.y2 = i->proc.act_point.y + ((LV_INDEV_POINT_MARKER >> 1) | 0x1);
lv_rfill(&area, NULL, LV_COLOR_MAKE(0xFF, 0, 0), LV_OPA_COVER);
#endif
indev_proc_press(&i->proc);
} else {
/*If a new point comes always make a release*/
indev_proc_release(&i->proc);
}
i->proc.last_point.x = i->proc.act_point.x;
i->proc.last_point.y = i->proc.act_point.y;
}
/**
* Process the pressed state of LV_INDEV_TYPE_POINER input devices
* @param indev pointer to an input device 'proc'
*/
static void indev_proc_press(lv_indev_proc_t * proc)
{
lv_obj_t * pr_obj = proc->act_obj;
if(proc->wait_unil_release != 0) return;
/*If there is no last object then search*/
if(proc->act_obj == NULL) {
pr_obj = indev_search_obj(proc, lv_layer_top());
if(pr_obj == NULL) pr_obj = indev_search_obj(proc, lv_scr_act());
}
/*If there is last object but it is not dragged and not protected also search*/
else if(proc->drag_in_prog == 0 &&
lv_obj_is_protected(proc->act_obj, LV_PROTECT_PRESS_LOST) == false) {/*Now act_obj != NULL*/
pr_obj = indev_search_obj(proc, lv_layer_top());
if(pr_obj == NULL) pr_obj = indev_search_obj(proc, lv_scr_act());
}
/*If a dragable or a protected object was the last then keep it*/
else {
}
/*If a new object was found reset some variables and send a pressed signal*/
if(pr_obj != proc->act_obj) {
proc->last_point.x = proc->act_point.x;
proc->last_point.y = proc->act_point.y;
/*If a new object found the previous was lost, so send a signal*/
if(proc->act_obj != NULL) {
proc->act_obj->signal_func(proc->act_obj, LV_SIGNAL_PRESS_LOST, indev_act);
if(proc->reset_query != 0) return;
}
if(pr_obj != NULL) {
/* Save the time when the obj pressed.
* It is necessary to count the long press time.*/
proc->pr_timestamp = lv_tick_get();
proc->long_pr_sent = 0;
proc->drag_range_out = 0;
proc->drag_in_prog = 0;
proc->drag_sum.x = 0;
proc->drag_sum.y = 0;
/*Search for 'top' attribute*/
lv_obj_t * i = pr_obj;
lv_obj_t * last_top = NULL;
while(i != NULL) {
if(i->top != 0) last_top = i;
i = lv_obj_get_parent(i);
}
if(last_top != NULL) {
/*Move the last_top object to the foreground*/
lv_obj_t * par = lv_obj_get_parent(last_top);
/*After list change it will be the new head*/
lv_ll_chg_list(&par->child_ll, &par->child_ll, last_top);
lv_obj_invalidate(last_top);
}
/*Send a signal about the press*/
pr_obj->signal_func(pr_obj, LV_SIGNAL_PRESSED, indev_act);
if(proc->reset_query != 0) return;
}
}
proc->act_obj = pr_obj; /*Save the pressed object*/
proc->last_obj = proc->act_obj; /*Refresh the last_obj*/
/*Calculate the vector*/
proc->vect.x = proc->act_point.x - proc->last_point.x;
proc->vect.y = proc->act_point.y - proc->last_point.y;
/*If there is active object and it can be dragged run the drag*/
if(proc->act_obj != NULL) {
proc->act_obj->signal_func(proc->act_obj, LV_SIGNAL_PRESSING, indev_act);
if(proc->reset_query != 0) return;
indev_drag(proc);
if(proc->reset_query != 0) return;
/*If there is no drag then check for long press time*/
if(proc->drag_in_prog == 0 && proc->long_pr_sent == 0) {
/*Send a signal about the long press if enough time elapsed*/
if(lv_tick_elaps(proc->pr_timestamp) > LV_INDEV_LONG_PRESS_TIME) {
pr_obj->signal_func(pr_obj, LV_SIGNAL_LONG_PRESS, indev_act);
if(proc->reset_query != 0) return;
/*Mark the signal sending to do not send it again*/
proc->long_pr_sent = 1;
/*Save the long press time stamp for the long press repeat handler*/
proc->longpr_rep_timestamp = lv_tick_get();
}
}
/*Send long press repeated signal*/
if(proc->drag_in_prog == 0 && proc->long_pr_sent == 1) {
/*Send a signal about the long press repeate if enough time elapsed*/
if(lv_tick_elaps(proc->longpr_rep_timestamp) > LV_INDEV_LONG_PRESS_REP_TIME) {
pr_obj->signal_func(pr_obj, LV_SIGNAL_LONG_PRESS_REP, indev_act);
if(proc->reset_query != 0) return;
proc->longpr_rep_timestamp = lv_tick_get();
}
}
}
}
/**
* Process the released state of LV_INDEV_TYPE_POINER input devices
* @param proc pointer to an input device 'proc'
*/
static void indev_proc_release(lv_indev_proc_t * proc)
{
if(proc->wait_unil_release != 0) {
proc->act_obj = NULL;
proc->last_obj = NULL;
proc->pr_timestamp = 0;
proc->longpr_rep_timestamp = 0;
proc->wait_unil_release = 0;
}
/*Forgot the act obj and send a released signal */
if(proc->act_obj != NULL) {
proc->act_obj->signal_func(proc->act_obj, LV_SIGNAL_RELEASED, indev_act);
/*Handle click focus*/
#if USE_LV_GROUP
/*Check, if the parent is in a group focus on it.*/
if(lv_obj_is_protected(proc->act_obj, LV_PROTECT_CLICK_FOCUS) == false) { /*Respect the click protection*/
lv_group_t * g = lv_obj_get_group(proc->act_obj);
lv_obj_t * parent = proc->act_obj;
while(g == NULL) {
parent = lv_obj_get_parent(parent);
if(parent == NULL) break;
if(lv_obj_is_protected(parent, LV_PROTECT_CLICK_FOCUS)) { /*Ignore is the protected against click focus*/
parent = NULL;
break;
}
g = lv_obj_get_group(parent);
}
if(g != NULL && parent != NULL)
if(lv_group_get_click_focus(g)) {
lv_group_focus_obj(parent);
}
}
#endif
if(proc->reset_query != 0) return;
proc->act_obj = NULL;
proc->pr_timestamp = 0;
proc->longpr_rep_timestamp = 0;
}
/*The reset can be set in the signal function.
* In case of reset query ignore the remaining parts.*/
if(proc->last_obj != NULL && proc->reset_query == 0) {
indev_drag_throw(proc);
if(proc->reset_query != 0) return;
}
}
/**
* Process a new point from LV_INDEV_TYPE_BUTTON input device
* @param i pointer to an input device
* @param data pointer to the data read from the input device
* Reset input device if a reset query has been sent to it
* @param indev pointer to an input device
*/
static void indev_proc_reset_query_handler(lv_indev_t * indev)
{
if(indev->proc.reset_query) {
indev->proc.act_obj = NULL;
indev->proc.last_obj = NULL;
indev->proc.drag_range_out = 0;
indev->proc.drag_in_prog = 0;
indev->proc.long_pr_sent = 0;
indev->proc.pr_timestamp = 0;
indev->proc.longpr_rep_timestamp = 0;
indev->proc.drag_sum.x = 0;
indev->proc.drag_sum.y = 0;
indev->proc.reset_query = 0;
}
}
/**
* Search the most top, clickable object on the last point of an input device
* @param indev pointer to an input device
* @param obj pointer to a start object, typically the screen
* @return pointer to the found object or NULL if there was no suitable object
*/
static lv_obj_t * indev_search_obj(const lv_indev_proc_t * indev, lv_obj_t * obj)
{
lv_obj_t * found_p = NULL;
/*If the point is on this object*/
/*Check its children too*/
if(lv_area_is_point_on(&obj->coords, &indev->act_point)) {
lv_obj_t * i;
LL_READ(obj->child_ll, i) {
found_p = indev_search_obj(indev, i);
/*If a child was found then break*/
if(found_p != NULL) {
break;
}
}
/*If then the children was not ok, and this obj is clickable
* and it or its parent is not hidden then save this object*/
if(found_p == NULL && lv_obj_get_click(obj) != false) {
lv_obj_t * hidden_i = obj;
while(hidden_i != NULL) {
if(lv_obj_get_hidden(hidden_i) == true) break;
hidden_i = lv_obj_get_parent(hidden_i);
}
/*No parent found with hidden == true*/
if(hidden_i == NULL) found_p = obj;
}
}
return found_p;
}
/**
* Handle the dragging of indev_proc_p->act_obj
* @param indev pointer to a input device state
*/
static void indev_drag(lv_indev_proc_t * state)
{
lv_obj_t * drag_obj = state->act_obj;
/*If drag parent is active check recursively the drag_parent attribute*/
while(lv_obj_get_drag_parent(drag_obj) != false &&
drag_obj != NULL) {
drag_obj = lv_obj_get_parent(drag_obj);
}
if(drag_obj == NULL) return;
if(lv_obj_get_drag(drag_obj) == false) return;
/*If still there is no drag then count the movement*/
if(state->drag_range_out == 0) {
state->drag_sum.x += state->vect.x;
state->drag_sum.y += state->vect.y;
/*If a move is greater then LV_DRAG_LIMIT then begin the drag*/
if(LV_MATH_ABS(state->drag_sum.x) >= LV_INDEV_DRAG_LIMIT ||
LV_MATH_ABS(state->drag_sum.y) >= LV_INDEV_DRAG_LIMIT) {
state->drag_range_out = 1;
}
}
/*If the drag limit is stepped over then handle the dragging*/
if(state->drag_range_out != 0) {
/*Set new position if the vector is not zero*/
if(state->vect.x != 0 ||
state->vect.y != 0) {
/*Get the coordinates of the object and modify them*/
lv_coord_t act_x = lv_obj_get_x(drag_obj);
lv_coord_t act_y = lv_obj_get_y(drag_obj);
uint16_t inv_buf_size = lv_refr_get_buf_size(); /*Get the number of currently invalidated areas*/
lv_coord_t prev_x = drag_obj->coords.x1;
lv_coord_t prev_y = drag_obj->coords.y1;
lv_obj_set_pos(drag_obj, act_x + state->vect.x, act_y + state->vect.y);
/*Set the drag in progress flag if the object is really moved*/
if(drag_obj->coords.x1 != prev_x || drag_obj->coords.y1 != prev_y) {
if(state->drag_range_out != 0) { /*Send the drag begin signal on first move*/
drag_obj->signal_func(drag_obj, LV_SIGNAL_DRAG_BEGIN, indev_act);
if(state->reset_query != 0) return;
}
state->drag_in_prog = 1;
}
/*If the object didn't moved then clear the invalidated areas*/
else {
uint16_t new_inv_buf_size = lv_refr_get_buf_size();
lv_refr_pop_from_buf(new_inv_buf_size - inv_buf_size);
}
}
}
}
/**
* Handle throwing by drag if the drag is ended
* @param indev pointer to an input device state
*/
static void indev_drag_throw(lv_indev_proc_t * state)
{
if(state->drag_in_prog == 0) return;
/*Set new position if the vector is not zero*/
lv_obj_t * drag_obj = state->last_obj;
/*If drag parent is active check recursively the drag_parent attribute*/
while(lv_obj_get_drag_parent(drag_obj) != false &&
drag_obj != NULL) {
drag_obj = lv_obj_get_parent(drag_obj);
}
if(drag_obj == NULL) return;
/*Return if the drag throw is not enabled*/
if(lv_obj_get_drag_throw(drag_obj) == false) {
state->drag_in_prog = 0;
drag_obj->signal_func(drag_obj, LV_SIGNAL_DRAG_END, indev_act);
return;
}
/*Reduce the vectors*/
state->vect.x = state->vect.x * (100 - LV_INDEV_DRAG_THROW) / 100;
state->vect.y = state->vect.y * (100 - LV_INDEV_DRAG_THROW) / 100;
if(state->vect.x != 0 ||
state->vect.y != 0) {
/*Get the coordinates and modify them*/
lv_coord_t act_x = lv_obj_get_x(drag_obj) + state->vect.x;
lv_coord_t act_y = lv_obj_get_y(drag_obj) + state->vect.y;
lv_obj_set_pos(drag_obj, act_x, act_y);
/*If non of the coordinates are changed then do not continue throwing*/
if((lv_obj_get_x(drag_obj) != act_x || state->vect.x == 0) &&
(lv_obj_get_y(drag_obj) != act_y || state->vect.y == 0)) {
state->drag_in_prog = 0;
state->vect.x = 0;
state->vect.y = 0;
drag_obj->signal_func(drag_obj, LV_SIGNAL_DRAG_END, indev_act);
}
}
/*If the vectors become 0 -> drag_in_prog = 0 and send a drag end signal*/
else {
state->drag_in_prog = 0;
drag_obj->signal_func(drag_obj, LV_SIGNAL_DRAG_END, indev_act);
}
}
#endif
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