/**
* Handle the drawing related tasks of the pages
* @param page pointer to an object
* @param mask the object will be drawn only in this area
* @param mode LV_DESIGN_COVER_CHK: only check if the object fully covers the 'mask_p' area
* (return 'true' if yes)
* LV_DESIGN_DRAW: draw the object (always return 'true')
* LV_DESIGN_DRAW_POST: drawing after every children are drawn
* @param return true/false, depends on 'mode'
*/
static bool lv_page_design(lv_obj_t * page, const lv_area_t * mask, lv_design_mode_t mode)
{
if(mode == LV_DESIGN_COVER_CHK) {
return ancestor_design(page, mask, mode);
} else if(mode == LV_DESIGN_DRAW_MAIN) {
/*Draw without border*/
lv_style_t *style = lv_page_get_style(page, LV_PAGE_STYLE_BG);
lv_coord_t border_width_tmp = style->body.border.width;
style->body.border.width = 0;
lv_draw_rect(&page->coords, mask, style);
style->body.border.width = border_width_tmp;
} else if(mode == LV_DESIGN_DRAW_POST) { /*Draw the scroll bars finally*/
/*Draw only a border*/
lv_style_t *style = lv_page_get_style(page, LV_PAGE_STYLE_BG);
lv_coord_t shadow_width_tmp = style->body.shadow.width;
uint8_t empty_tmp = style->body.empty;
style->body.shadow.width = 0;
style->body.empty = 1;
lv_draw_rect(&page->coords, mask, style);
style->body.shadow.width = shadow_width_tmp;
style->body.empty = empty_tmp;
lv_page_ext_t * ext = lv_obj_get_ext_attr(page);
/*Draw the scrollbars*/
lv_area_t sb_area;
if(ext->sb.hor_draw) {
/*Convert the relative coordinates to absolute*/
lv_area_copy(&sb_area, &ext->sb.hor_area);
sb_area.x1 += page->coords.x1;
sb_area.y1 += page->coords.y1;
sb_area.x2 += page->coords.x1;
sb_area.y2 += page->coords.y1;
lv_draw_rect(&sb_area, mask, ext->sb.style);
}
if(ext->sb.ver_draw) {
/*Convert the relative coordinates to absolute*/
lv_area_copy(&sb_area, &ext->sb.ver_area);
sb_area.x1 += page->coords.x1;
sb_area.y1 += page->coords.y1;
sb_area.x2 += page->coords.x1;
sb_area.y2 += page->coords.y1;
lv_draw_rect(&sb_area, mask, ext->sb.style);
}
}
return true;
}
/**
* Handle the drawing related tasks of the sliders
* @param slider pointer to an object
* @param mask the object will be drawn only in this area
* @param mode LV_DESIGN_COVER_CHK: only check if the object fully covers the 'mask_p' area
* (return 'true' if yes)
* LV_DESIGN_DRAW: draw the object (always return 'true')
* LV_DESIGN_DRAW_POST: drawing after every children are drawn
* @param return true/false, depends on 'mode'
*/
static bool lv_slider_design(lv_obj_t * slider, const lv_area_t * mask, lv_design_mode_t mode)
{
/*Return false if the object is not covers the mask_p area*/
if(mode == LV_DESIGN_COVER_CHK) {
return false;
}
/*Draw the object*/
else if(mode == LV_DESIGN_DRAW_MAIN) {
lv_slider_ext_t * ext = lv_obj_get_ext_attr(slider);
lv_style_t * style_bg = lv_slider_get_style(slider, LV_SLIDER_STYLE_BG);
lv_style_t * style_knob = lv_slider_get_style(slider, LV_SLIDER_STYLE_KNOB);
lv_style_t * style_indic = lv_slider_get_style(slider, LV_SLIDER_STYLE_INDIC);
lv_coord_t slider_w = lv_area_get_width(&slider->coords);
lv_coord_t slider_h = lv_area_get_height(&slider->coords);
/*Draw the bar*/
lv_area_t area_bg;
lv_area_copy(&area_bg, &slider->coords);
/*Be sure at least LV_SLIDER_SIZE_MIN size will remain*/
lv_coord_t pad_ver_bg = style_bg->body.padding.ver;
lv_coord_t pad_hor_bg = style_bg->body.padding.hor;
if(pad_ver_bg * 2 + LV_SLIDER_SIZE_MIN > lv_area_get_height(&area_bg)) {
pad_ver_bg = (lv_area_get_height(&area_bg) - LV_SLIDER_SIZE_MIN) >> 1;
}
/**
* Draw a rectangle which has gradient on its top and bottom
* @param roller pointer to a roller object
* @param mask pointer to the current mask (from the design function)
*/
static void draw_bg(lv_obj_t *roller, const lv_area_t *mask)
{
lv_style_t *style = lv_roller_get_style(roller, LV_ROLLER_STYLE_BG);
lv_area_t half_mask;
lv_area_t half_roller;
lv_coord_t h = lv_obj_get_height(roller);
bool union_ok;
lv_area_copy(&half_roller, &roller->coords);
half_roller.x1 -= roller->ext_size; /*Add ext size too (e.g. because of shadow draw) */
half_roller.x2 += roller->ext_size;
half_roller.y1 -= roller->ext_size;
half_roller.y2 = roller->coords.y1 + h / 2;
union_ok = lv_area_union(&half_mask, &half_roller, mask);
half_roller.x1 += roller->ext_size; /*Revert ext. size adding*/
half_roller.x2 -= roller->ext_size;
half_roller.y1 += roller->ext_size;
half_roller.y2 += style->body.radius;
if(union_ok) {
lv_draw_rect(&half_roller, &half_mask, style);
}
half_roller.x1 -= roller->ext_size; /*Add ext size too (e.g. because of shadow draw) */
half_roller.x2 += roller->ext_size;
half_roller.y2 = roller->coords.y2 + roller->ext_size;
half_roller.y1 = roller->coords.y1 + h / 2;
if((h & 0x1) == 0) half_roller.y1++; /*With even height the pixels in the middle would be drawn twice*/
union_ok = lv_area_union(&half_mask, &half_roller, mask);
half_roller.x1 += roller->ext_size; /*Revert ext. size adding*/
half_roller.x2 -= roller->ext_size;
half_roller.y2 -= roller->ext_size;
half_roller.y1 -= style->body.radius;
if(union_ok){
lv_color_t main_tmp = style->body.main_color;
lv_color_t grad_tmp = style->body.grad_color;
style->body.main_color = grad_tmp;
style->body.grad_color = main_tmp;
lv_draw_rect(&half_roller, &half_mask, style);
style->body.main_color = main_tmp;
style->body.grad_color = grad_tmp;
}
}
/**
* Refresh the position and size of the scroll bars.
* @param page pointer to a page object
*/
static void lv_page_sb_refresh(lv_obj_t * page)
{
lv_page_ext_t * ext = lv_obj_get_ext_attr(page);
lv_style_t * style = lv_obj_get_style(page);
lv_obj_t * scrl = ext->scrl;
lv_coord_t size_tmp;
lv_coord_t scrl_w = lv_obj_get_width(scrl);
lv_coord_t scrl_h = lv_obj_get_height(scrl);
lv_coord_t hpad = style->body.padding.hor;
lv_coord_t vpad = style->body.padding.ver;
lv_coord_t obj_w = lv_obj_get_width(page);
lv_coord_t obj_h = lv_obj_get_height(page);
/*Always let 'scrollbar width' padding above, under, left and right to the scrollbars
* else:
* - horizontal and vertical scrollbars can overlap on the corners
* - if the page has radius the scrollbar can be out of the radius */
lv_coord_t sb_hor_pad = LV_MATH_MAX(ext->sb.style->body.padding.inner, style->body.padding.hor);
lv_coord_t sb_ver_pad = LV_MATH_MAX(ext->sb.style->body.padding.inner, style->body.padding.ver);
if(ext->sb.mode == LV_SB_MODE_OFF) return;
if(ext->sb.mode == LV_SB_MODE_ON) {
ext->sb.hor_draw = 1;
ext->sb.ver_draw = 1;
}
/*Invalidate the current (old) scrollbar areas*/
lv_area_t sb_area_tmp;
if(ext->sb.hor_draw != 0) {
lv_area_copy(&sb_area_tmp, &ext->sb.hor_area);
sb_area_tmp.x1 += page->coords.x1;
sb_area_tmp.y1 += page->coords.y1;
sb_area_tmp.x2 += page->coords.x2;
sb_area_tmp.y2 += page->coords.y2;
lv_inv_area(&sb_area_tmp);
}
if(ext->sb.ver_draw != 0) {
lv_area_copy(&sb_area_tmp, &ext->sb.ver_area);
sb_area_tmp.x1 += page->coords.x1;
sb_area_tmp.y1 += page->coords.y1;
sb_area_tmp.x2 += page->coords.x2;
sb_area_tmp.y2 += page->coords.y2;
lv_inv_area(&sb_area_tmp);
}
if(ext->sb.mode == LV_SB_MODE_DRAG && lv_indev_is_dragging(lv_indev_get_act()) == false) {
ext->sb.hor_draw = 0;
ext->sb.ver_draw = 0;
return;
}
/*Horizontal scrollbar*/
if(scrl_w <= obj_w - 2 * hpad) { /*Full sized scroll bar*/
lv_area_set_width(&ext->sb.hor_area, obj_w - 2 * sb_hor_pad);
lv_area_set_pos(&ext->sb.hor_area, sb_hor_pad, obj_h - ext->sb.style->body.padding.inner - ext->sb.style->body.padding.ver);
if(ext->sb.mode == LV_SB_MODE_AUTO || ext->sb.mode == LV_SB_MODE_DRAG) ext->sb.hor_draw = 0;
} else {
size_tmp = (obj_w * (obj_w - (2 * sb_hor_pad))) / (scrl_w + 2 * hpad);
if(size_tmp < LV_PAGE_SB_MIN_SIZE) size_tmp = LV_PAGE_SB_MIN_SIZE;
lv_area_set_width(&ext->sb.hor_area, size_tmp);
lv_area_set_pos(&ext->sb.hor_area, sb_hor_pad +
(-(lv_obj_get_x(scrl) - hpad) * (obj_w - size_tmp - 2 * sb_hor_pad)) /
(scrl_w + 2 * hpad - obj_w ),
obj_h - ext->sb.style->body.padding.inner - ext->sb.style->body.padding.ver);
if(ext->sb.mode == LV_SB_MODE_AUTO || ext->sb.mode == LV_SB_MODE_DRAG) ext->sb.hor_draw = 1;
}
/*Vertical scrollbar*/
if(scrl_h <= obj_h - 2 * vpad) { /*Full sized scroll bar*/
lv_area_set_height(&ext->sb.ver_area, obj_h - 2 * sb_ver_pad);
lv_area_set_pos(&ext->sb.ver_area, obj_w - ext->sb.style->body.padding.inner - ext->sb.style->body.padding.hor, sb_ver_pad);
if(ext->sb.mode == LV_SB_MODE_AUTO || ext->sb.mode == LV_SB_MODE_DRAG) ext->sb.ver_draw = 0;
} else {
size_tmp = (obj_h * (obj_h - (2 * sb_ver_pad))) / (scrl_h + 2 * vpad);
if(size_tmp < LV_PAGE_SB_MIN_SIZE) size_tmp = LV_PAGE_SB_MIN_SIZE;
lv_area_set_height(&ext->sb.ver_area, size_tmp);
lv_area_set_pos(&ext->sb.ver_area, obj_w - ext->sb.style->body.padding.inner - ext->sb.style->body.padding.hor,
sb_ver_pad +
(-(lv_obj_get_y(scrl) - vpad) * (obj_h - size_tmp - 2 * sb_ver_pad)) /
(scrl_h + 2 * vpad - obj_h ));
if(ext->sb.mode == LV_SB_MODE_AUTO || ext->sb.mode == LV_SB_MODE_DRAG) ext->sb.ver_draw = 1;
}
/*Invalidate the new scrollbar areas*/
if(ext->sb.hor_draw != 0) {
lv_area_copy(&sb_area_tmp, &ext->sb.hor_area);
sb_area_tmp.x1 += page->coords.x1;
sb_area_tmp.y1 += page->coords.y1;
sb_area_tmp.x2 += page->coords.x2;
sb_area_tmp.y2 += page->coords.y2;
lv_inv_area(&sb_area_tmp);
}
if(ext->sb.ver_draw != 0) {
lv_area_copy(&sb_area_tmp, &ext->sb.ver_area);
sb_area_tmp.x1 += page->coords.x1;
sb_area_tmp.y1 += page->coords.y1;
sb_area_tmp.x2 += page->coords.x2;
sb_area_tmp.y2 += page->coords.y2;
lv_inv_area(&sb_area_tmp);
}
}
/**
* Signal function of the scrollable part of a page
* @param scrl pointer to the scrollable 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_page_scrollable_signal(lv_obj_t * scrl, lv_signal_t sign, void * param)
{
lv_res_t res;
/* Include the ancient signal function */
res = ancestor_signal(scrl, sign, param);
if(res != LV_RES_OK) return res;
lv_obj_t * page = lv_obj_get_parent(scrl);
lv_style_t * page_style = lv_obj_get_style(page);
lv_page_ext_t * page_ext = lv_obj_get_ext_attr(page);
if(sign == LV_SIGNAL_CORD_CHG) {
/*Be sure the width of the scrollable is correct*/
if(lv_cont_get_hor_fit(scrl) == false) {
lv_obj_set_width(scrl, lv_obj_get_width(page) - 2 * page_style->body.padding.hor);
}
/*Limit the position of the scrollable object to be always visible
* (Do not let its edge inner then its parent respective edge)*/
lv_coord_t new_x;
lv_coord_t new_y;
bool refr_x = false;
bool refr_y = false;
lv_area_t page_cords;
lv_area_t scrl_cords;
lv_coord_t hpad = page_style->body.padding.hor;
lv_coord_t vpad = page_style->body.padding.ver;
new_x = lv_obj_get_x(scrl);
new_y = lv_obj_get_y(scrl);
lv_obj_get_coords(scrl, &scrl_cords);
lv_obj_get_coords(page, &page_cords);
/*scrollable width smaller then page width? -> align to left*/
if(lv_area_get_width(&scrl_cords) + 2 * hpad < lv_area_get_width(&page_cords)) {
if(scrl_cords.x1 != page_cords.x1 + hpad) {
new_x = hpad;
refr_x = true;
}
} else {
/*The edges of the scrollable can not be in the page (minus hpad) */
if(scrl_cords.x2 < page_cords.x2 - hpad) {
new_x = lv_area_get_width(&page_cords) - lv_area_get_width(&scrl_cords) - hpad; /* Right align */
refr_x = true;
}
if (scrl_cords.x1 > page_cords.x1 + hpad) {
new_x = hpad; /*Left align*/
refr_x = true;
}
}
/*scrollable height smaller then page height? -> align to left*/
if(lv_area_get_height(&scrl_cords) + 2 * vpad < lv_area_get_height(&page_cords)) {
if(scrl_cords.y1 != page_cords.y1 + vpad) {
new_y = vpad;
refr_y = true;
}
} else {
/*The edges of the scrollable can not be in the page (minus vpad) */
if(scrl_cords.y2 < page_cords.y2 - vpad) {
new_y = lv_area_get_height(&page_cords) - lv_area_get_height(&scrl_cords) - vpad; /* Bottom align */
refr_y = true;
}
if (scrl_cords.y1 > page_cords.y1 + vpad) {
new_y = vpad; /*Top align*/
refr_y = true;
}
}
if(refr_x != false || refr_y != false) {
lv_obj_set_pos(scrl, new_x, new_y);
}
lv_page_sb_refresh(page);
}
else if(sign == LV_SIGNAL_DRAG_END) {
/*Hide scrollbars if required*/
if(page_ext->sb.mode == LV_SB_MODE_DRAG) {
lv_area_t sb_area_tmp;
if(page_ext->sb.hor_draw) {
lv_area_copy(&sb_area_tmp, &page_ext->sb.hor_area);
sb_area_tmp.x1 += page->coords.x1;
sb_area_tmp.y1 += page->coords.y1;
sb_area_tmp.x2 += page->coords.x2;
sb_area_tmp.y2 += page->coords.y2;
lv_inv_area(&sb_area_tmp);
page_ext->sb.hor_draw = 0;
}
if(page_ext->sb.ver_draw) {
lv_area_copy(&sb_area_tmp, &page_ext->sb.ver_area);
sb_area_tmp.x1 += page->coords.x1;
sb_area_tmp.y1 += page->coords.y1;
sb_area_tmp.x2 += page->coords.x2;
sb_area_tmp.y2 += page->coords.y2;
lv_inv_area(&sb_area_tmp);
page_ext->sb.ver_draw = 0;
}
}
}
else if(sign == LV_SIGNAL_PRESSED) {
if(page_ext->pr_action != NULL) {
page_ext->pr_action(page);
}
}
else if(sign == LV_SIGNAL_RELEASED) {
if(lv_indev_is_dragging(lv_indev_get_act()) == false) {
if(page_ext->rel_action != NULL) {
page_ext->rel_action(page);
}
}
}
return res;
}
