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lv_slider: update drag-set mechanism

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This commit is contained in:
Gabor Kiss-Vamosi 2017-11-08 11:37:01 +01:00
parent 72605cac51
commit 6862cbdec2
2 changed files with 93 additions and 102 deletions
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186
lv_objx/lv_slider.c
View File

@ -18,7 +18,7 @@
* DEFINES
*********************/
#define LV_SLIDER_SIZE_MIN (2 << LV_ANTIALIAS) /*hpad and vpad cannot make the bar or indicator smaller then this [px]*/
#define LV_SLIDER_NOT_PRESSED INT16_MIN
/**********************
* TYPEDEFS
**********************/
@ -27,6 +27,7 @@
* STATIC PROTOTYPES
**********************/
static bool lv_slider_design(lv_obj_t * slider, const area_t * mask, lv_design_mode_t mode);
static lv_res_t lv_slider_signal(lv_obj_t * slider, lv_signal_t sign, void * param);
/**********************
* STATIC VARIABLES
@ -93,91 +94,6 @@ lv_obj_t * lv_slider_create(lv_obj_t * par, lv_obj_t * copy)
return new_slider;
}
/**
* Signal function of the slider
* @param slider pointer to a slider object
* @param sign a signal type from lv_signal_t enum
* @param param pointer to a signal specific variable
* @return true: the object is still valid (not deleted), false: the object become invalid
*/
bool lv_slider_signal(lv_obj_t * slider, lv_signal_t sign, void * param)
{
bool valid;
/* Include the ancient signal function */
valid = ancestor_signal(slider, sign, param);
/* The object can be deleted so check its validity and then
* make the object specific signal handling */
if(valid != false) {
lv_slider_ext_t * ext = lv_obj_get_ext_attr(slider);
point_t p;
cord_t w = lv_obj_get_width(slider);
cord_t h = lv_obj_get_height(slider);
int16_t tmp;
if(sign == LV_SIGNAL_PRESSED) {
ext->tmp_value = lv_slider_get_value(slider);
}
else if(sign == LV_SIGNAL_PRESSING) {
lv_indev_get_point(param, &p);
if(w > h) {
cord_t knob_w = h;
p.x -= slider->coords.x1 + h / 2; /*Modify the point to shift with half knob (important on the start and end)*/
tmp = (int32_t) ((int32_t) p.x * (ext->bar.max_value - ext->bar.min_value + 1)) / (w - knob_w);
} else {
cord_t knob_h = w;
p.y -= slider->coords.y1 + w / 2; /*Modify the point to shift with half knob (important on the start and end)*/
tmp = (int32_t) ((int32_t) p.y * (ext->bar.max_value - ext->bar.min_value + 1)) / (h - knob_h);
tmp = ext->bar.max_value - tmp; /*Invert he value: small value means higher y*/
}
lv_slider_set_value(slider, tmp);
}
else if (sign == LV_SIGNAL_PRESS_LOST) {
lv_slider_set_value(slider, ext->tmp_value);
}
else if (sign == LV_SIGNAL_RELEASED) {
ext->tmp_value = lv_slider_get_value(slider);
lv_slider_set_value(slider, ext->tmp_value);
if(ext->action != NULL) ext->action(slider);
}
else if(sign == LV_SIGNAL_CORD_CHG) {
/* The knob size depends on slider size.
* During the drawing method the ext. size is used by the knob so refresh the ext. size.*/
if(lv_obj_get_width(slider) != area_get_width(param) ||
lv_obj_get_height(slider) != area_get_height(param)) {
slider->signal_func(slider, LV_SIGNAL_REFR_EXT_SIZE, NULL);
}
} else if(sign == LV_SIGNAL_REFR_EXT_SIZE) {
if(ext->knob_in == 0) {
cord_t x = MATH_MIN(w, h); /*The smaller size is the knob diameter*/
if(slider->ext_size < x) slider->ext_size = x;
} else {
lv_style_t * style = lv_obj_get_style(slider);
cord_t pad = MATH_MIN(style->body.padding.hor, style->body.padding.ver);
if(pad < 0) {
pad = -pad;
if(slider->ext_size < pad) slider->ext_size = pad;
}
}
} else if(sign == LV_SIGNAL_CONTROLL) {
lv_slider_ext_t * ext = lv_obj_get_ext_attr(slider);
char c = *((char*)param);
if(c == LV_GROUP_KEY_RIGHT || c == LV_GROUP_KEY_UP) {
lv_slider_set_value(slider, lv_slider_get_value(slider) + 1);
if(ext->action != NULL) ext->action(slider);
} else if(c == LV_GROUP_KEY_LEFT || c == LV_GROUP_KEY_DOWN) {
lv_slider_set_value(slider, lv_slider_get_value(slider) - 1);
if(ext->action != NULL) ext->action(slider);
}
}
}
return valid;
}
/*=====================
* Setter functions
*====================*/
@ -287,6 +203,8 @@ static bool lv_slider_design(lv_obj_t * slider, const area_t * mask, lv_design_m
}
/*Draw the object*/
else if(mode == LV_DESIGN_DRAW_MAIN) {
lv_vfill(&slider->coords, mask, COLOR_LIME, OPA_COVER);
lv_slider_ext_t * ext = lv_obj_get_ext_attr(slider);
lv_style_t * style_slider = lv_slider_get_style_bg(slider);
@ -334,22 +252,24 @@ static bool lv_slider_design(lv_obj_t * slider, const area_t * mask, lv_design_m
cord_t slider_w = area_get_width(&slider->coords);
cord_t slider_h = area_get_height(&slider->coords);
cord_t act_value = lv_slider_get_value(slider);
cord_t cur_value = lv_slider_get_value(slider);
cord_t min_value = lv_slider_get_min_value(slider);
cord_t max_value = lv_slider_get_max_value(slider);
if(ext->tmp_value != LV_SLIDER_NOT_PRESSED) cur_value = ext->tmp_value;
if(slider_w >= slider_h) {
area_indic.x2 = (int32_t) ((int32_t)area_get_width(&area_indic) * act_value) / (max_value - min_value);
area_indic.x2 = (int32_t) ((int32_t)area_get_width(&area_indic) * cur_value) / (max_value - min_value);
area_indic.x2 += area_indic.x1;
} else {
area_indic.y1 = (int32_t) ((int32_t)area_get_height(&area_indic) * act_value) / (max_value - min_value);
area_indic.y1 = (int32_t) ((int32_t)area_get_height(&area_indic) * cur_value) / (max_value - min_value);
area_indic.y1 = area_indic.y2 - area_indic.y1;
}
/*Draw the indicator*/
if(act_value != min_value) lv_draw_rect(&area_indic, mask, style_indic);
if(cur_value != min_value) lv_draw_rect(&area_indic, mask, style_indic);
/*Draw the knob*/
area_t knob_area;
area_cpy(&knob_area, &slider->coords);
@ -358,7 +278,7 @@ static bool lv_slider_design(lv_obj_t * slider, const area_t * mask, lv_design_m
knob_area.x1 = area_indic.x2 - slider_h / 2;
knob_area.x2 = knob_area.x1 + slider_h;
} else {
knob_area.x1 = (int32_t) ((int32_t)(slider_w - slider_h) * act_value) / (max_value - min_value);
knob_area.x1 = (int32_t) ((int32_t)(slider_w - slider_h) * cur_value) / (max_value - min_value);
knob_area.x1 += slider->coords.x1;
knob_area.x2 = knob_area.x1 + slider_h;
}
@ -370,7 +290,7 @@ static bool lv_slider_design(lv_obj_t * slider, const area_t * mask, lv_design_m
knob_area.y1 = area_indic.y1 - slider_w / 2;
knob_area.y2 = knob_area.y1 + slider_w;
} else {
knob_area.y2 = (int32_t) ((int32_t)(slider_h - slider_w) * act_value) / (max_value - min_value);
knob_area.y2 = (int32_t) ((int32_t)(slider_h - slider_w) * cur_value) / (max_value - min_value);
knob_area.y2 = slider->coords.y2 - knob_area.y2;
knob_area.y1 = knob_area.y2 - slider_w;
}
@ -390,4 +310,84 @@ static bool lv_slider_design(lv_obj_t * slider, const area_t * mask, lv_design_m
return true;
}
/**
* Signal function of the slider
* @param slider pointer to a slider object
* @param sign a signal type from lv_signal_t enum
* @param param pointer to a signal specific variable
* @return LV_RES_OK: the object is not deleted in the function; LV_RES_INV: the object is deleted
*/
static lv_res_t lv_slider_signal(lv_obj_t * slider, lv_signal_t sign, void * param)
{
lv_res_t res;
/* Include the ancient signal function */
res = ancestor_signal(slider, sign, param);
if(res != LV_RES_OK) return res;
lv_slider_ext_t * ext = lv_obj_get_ext_attr(slider);
point_t p;
cord_t w = lv_obj_get_width(slider);
cord_t h = lv_obj_get_height(slider);
if(sign == LV_SIGNAL_PRESSED) {
ext->tmp_value = lv_slider_get_value(slider);
}
else if(sign == LV_SIGNAL_PRESSING) {
lv_indev_get_point(param, &p);
if(w > h) {
cord_t knob_w = h;
p.x -= slider->coords.x1 + h / 2; /*Modify the point to shift with half knob (important on the start and end)*/
ext->tmp_value = (int32_t) ((int32_t) p.x * (ext->bar.max_value - ext->bar.min_value + 1)) / (w - knob_w);
} else {
cord_t knob_h = w;
p.y -= slider->coords.y1 + w / 2; /*Modify the point to shift with half knob (important on the start and end)*/
ext->tmp_value = (int32_t) ((int32_t) p.y * (ext->bar.max_value - ext->bar.min_value + 1)) / (h - knob_h);
ext->tmp_value = ext->bar.max_value - ext->tmp_value; /*Invert the value: smaller value means higher y*/
}
lv_obj_invalidate(slider);
}
else if (sign == LV_SIGNAL_PRESS_LOST) {
ext->tmp_value = LV_SLIDER_NOT_PRESSED;
}
else if (sign == LV_SIGNAL_RELEASED) {
lv_slider_set_value(slider, ext->tmp_value);
ext->tmp_value = LV_SLIDER_NOT_PRESSED;
if(ext->action != NULL) ext->action(slider);
}
else if(sign == LV_SIGNAL_CORD_CHG) {
/* The knob size depends on slider size.
* During the drawing method the ext. size is used by the knob so refresh the ext. size.*/
if(lv_obj_get_width(slider) != area_get_width(param) ||
lv_obj_get_height(slider) != area_get_height(param)) {
slider->signal_func(slider, LV_SIGNAL_REFR_EXT_SIZE, NULL);
}
} else if(sign == LV_SIGNAL_REFR_EXT_SIZE) {
if(ext->knob_in == 0) {
cord_t x = MATH_MIN(w, h); /*The smaller size is the knob diameter*/
if(slider->ext_size < x) slider->ext_size = x;
} else {
lv_style_t * style = lv_obj_get_style(slider);
cord_t pad = MATH_MIN(style->body.padding.hor, style->body.padding.ver);
if(pad < 0) {
pad = -pad;
if(slider->ext_size < pad) slider->ext_size = pad;
}
}
} else if(sign == LV_SIGNAL_CONTROLL) {
lv_slider_ext_t * ext = lv_obj_get_ext_attr(slider);
char c = *((char*)param);
if(c == LV_GROUP_KEY_RIGHT || c == LV_GROUP_KEY_UP) {
lv_slider_set_value(slider, lv_slider_get_value(slider) + 1);
if(ext->action != NULL) ext->action(slider);
} else if(c == LV_GROUP_KEY_LEFT || c == LV_GROUP_KEY_DOWN) {
lv_slider_set_value(slider, lv_slider_get_value(slider) - 1);
if(ext->action != NULL) ext->action(slider);
}
}
return LV_RES_OK;
}
#endif

9
lv_objx/lv_slider.h
View File

@ -55,15 +55,6 @@ typedef enum
*/
lv_obj_t * lv_slider_create(lv_obj_t * par, lv_obj_t * copy);
/**
* Signal function of the slider
* @param slider pointer to a slider object
* @param sign a signal type from lv_signal_t enum
* @param param pointer to a signal specific variable
* @return true: the object is still valid (not deleted), false: the object become invalid
*/
bool lv_slider_signal(lv_obj_t * slider, lv_signal_t sign, void * param);
/**
* Set a function which will be called when a new value is set on the slider
* @param slider pointer to slider object