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lvgl/lv_objx/lv_page.c
Gabor c295a04d6c prototype argument renameing
2016-10-07 11:15:46 +02:00

462 lines
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/**
* @file lv_page.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_conf.h"
#if USE_LV_PAGE != 0
#include "misc/math/math_base.h"
#include "../lv_objx/lv_page.h"
#include "../lv_objx/lv_rect.h"
#include "../lv_draw/lv_draw.h"
#include "../lv_obj/lv_refr.h"
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static void lv_page_sb_refresh(lv_obj_t * main);
static bool lv_page_design(lv_obj_t * page, const area_t * mask, lv_design_mode_t mode);
static bool lv_scrolling_signal(lv_obj_t * page, lv_signal_t sign, void* param);
static void lv_pages_init(void);
/**********************
* STATIC VARIABLES
**********************/
static lv_pages_t lv_pages_def;
static lv_pages_t lv_pages_transp;
static lv_design_f_t ancestor_design_f;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/*-----------------
* Create function
*-----------------*/
/**
* Create a page objects
* @param par pointer to an object, it will be the parent of the new page
* @param copy pointer to a page object, if not NULL then the new object will be copied from it
* @return pointer to the created page
*/
lv_obj_t * lv_page_create(lv_obj_t * par, lv_obj_t * copy)
{
/*Create the ancestor object*/
lv_obj_t * new_page = lv_rect_create(par, copy);
dm_assert(new_page);
/*Allocate the object type specific extended data*/
lv_page_ext_t * ext = lv_obj_alloc_ext(new_page, sizeof(lv_page_ext_t));
dm_assert(ext);
if(ancestor_design_f == NULL) {
ancestor_design_f = lv_obj_get_design_f(new_page);
}
/*Init the new page object*/
if(copy == NULL) {
lv_pages_t * pages = lv_pages_get(LV_PAGES_DEF, NULL);
ext->scrolling = lv_rect_create(new_page, NULL);
lv_obj_set_signal_f(ext->scrolling, lv_scrolling_signal);
lv_obj_set_drag(ext->scrolling, true);
lv_obj_set_drag_throw(ext->scrolling, true);
lv_rect_set_fit(ext->scrolling, true, true);
lv_obj_set_style(ext->scrolling, &pages->scrable_rects);
/* Add the signal function only if 'scrolling' is created
* because everything has to be ready before any signal is received*/
lv_obj_set_signal_f(new_page, lv_page_signal);
lv_obj_set_design_f(new_page, lv_page_design);
lv_obj_set_style(new_page, pages);
} else {
lv_page_ext_t * copy_ext = lv_obj_get_ext(copy);
ext->scrolling = lv_rect_create(new_page, copy_ext->scrolling);
lv_obj_set_signal_f(ext->scrolling, lv_scrolling_signal);
/* Add the signal function only if 'scrolling' is created
* because everything has to be ready before any signal is received*/
lv_obj_set_signal_f(new_page, lv_page_signal);
lv_obj_set_design_f(new_page, lv_page_design);
lv_obj_set_style(new_page, lv_obj_get_style(copy));
}
lv_page_sb_refresh(new_page);
return new_page;
}
/**
* Signal function of the page
* @param page pointer to a page object
* @param sign a signal type from lv_signal_t enum
* @param param pointer to a signal specific variable
*/
bool lv_page_signal(lv_obj_t * page, lv_signal_t sign, void * param)
{
bool obj_valid = true;
/* Include the ancient signal function */
obj_valid = lv_rect_signal(page, sign, param);
/* The object can be deleted so check its validity and then
* make the object specific signal handling */
if(obj_valid != false) {
lv_page_ext_t * ext = lv_obj_get_ext(page);
lv_pages_t * pages = lv_obj_get_style(page);
lv_obj_t * child;
switch(sign) {
case LV_SIGNAL_CHILD_CHG: /*Be sure, only scrollable object is on the page*/
child = lv_obj_get_child(page, NULL);
while(child != NULL) {
if(child != ext->scrolling) {
lv_obj_t * tmp = child;
child = lv_obj_get_child(page, child); /*Get the next child before move this*/
lv_obj_set_parent(tmp, ext->scrolling);
} else {
child = lv_obj_get_child(page, child);
}
}
break;
case LV_SIGNAL_STYLE_CHG:
area_set_height(&ext->sbh, pages->sb_width);
area_set_width(&ext->sbv, pages->sb_width);
lv_obj_set_style(ext->scrolling, &pages->scrable_rects);
if(pages->sb_mode == LV_PAGE_SB_MODE_ON) {
ext->sbh_draw = 1;
ext->sbv_draw = 1;
} else {
ext->sbh_draw = 0;
ext->sbv_draw = 0;
}
lv_page_sb_refresh(page);
break;
case LV_SIGNAL_CORD_CHG:
lv_page_sb_refresh(page);
break;
default:
break;
}
}
return obj_valid;
}
/**
* Signal function of the scrollable part of a page
* @param scrolling pointer to the scrollable object
* @param sign a signal type from lv_signal_t enum
* @param param pointer to a signal specific variable
*/
static bool lv_scrolling_signal(lv_obj_t * scrolling, lv_signal_t sign, void* param)
{
bool obj_valid = true;
/* Include the ancient signal function */
obj_valid = lv_rect_signal(scrolling, sign, param);
/* The object can be deleted so check its validity and then
* make the object specific signal handling */
if(obj_valid != false) {
cord_t new_x;
cord_t new_y;
bool refr_x = false;
bool refr_y = false;
area_t page_cords;
area_t obj_cords;
lv_obj_t * page = lv_obj_get_parent(scrolling);
lv_pages_t * pages = lv_obj_get_style(page);
lv_page_ext_t * page_ext = lv_obj_get_ext(page);
cord_t hpad = pages->bg_rects.hpad;
cord_t vpad = pages->bg_rects.vpad;
switch(sign) {
case LV_SIGNAL_CORD_CHG:
new_x = lv_obj_get_x(scrolling);
new_y = lv_obj_get_y(scrolling);
lv_obj_get_cords(scrolling, &obj_cords);
lv_obj_get_cords(page, &page_cords);
/*scrollable width smaller then page width? -> align to left*/
if(area_get_width(&obj_cords) + 2 * hpad < area_get_width(&page_cords)) {
if(obj_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(obj_cords.x2 < page_cords.x2 - hpad) {
new_x = area_get_width(&page_cords) - area_get_width(&obj_cords) - hpad; /* Right align */
refr_x = true;
}
if (obj_cords.x1 > page_cords.x1 + hpad) {
new_x = hpad; /*Left align*/
refr_x = true;
}
}
/*scrollable height smaller then page height? -> align to left*/
if(area_get_height(&obj_cords) + 2 * vpad < area_get_height(&page_cords)) {
if(obj_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(obj_cords.y2 < page_cords.y2 - vpad) {
new_y = area_get_height(&page_cords) - area_get_height(&obj_cords) - vpad; /* Bottom align */
refr_y = true;
}
if (obj_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(scrolling, new_x, new_y);
}
lv_page_sb_refresh(page);
break;
case LV_SIGNAL_DRAG_BEGIN:
if(pages->sb_mode == LV_PAGE_SB_MODE_AUTO ) {
if(area_get_height(&page_ext->sbv) < lv_obj_get_height(scrolling) - pages->sb_width) {
page_ext->sbv_draw = 1;
lv_inv_area(&page_ext->sbv);
}
if(area_get_width(&page_ext->sbh) < lv_obj_get_width(scrolling) - pages->sb_width) {
page_ext->sbh_draw = 1;
lv_inv_area(&page_ext->sbh);
}
}
break;
case LV_SIGNAL_DRAG_END:
if(pages->sb_mode == LV_PAGE_SB_MODE_AUTO) {
page_ext->sbh_draw = 0;
page_ext->sbv_draw = 0;
lv_inv_area(&page_ext->sbh);
lv_inv_area(&page_ext->sbv);
}
break;
default:
break;
}
}
return obj_valid;
}
/*=====================
* Setter functions
*====================*/
/**
* Glue the object to the page. After it the page can be moved (dragged) with this object too.
* @param page pointer to an object on a page
* @param glue true: enable glue, false: disable glue
*/
void lv_page_glue_obj(lv_obj_t * page, bool glue)
{
lv_obj_set_drag_parent(page, glue);
lv_obj_set_drag(page, glue);
}
/*=====================
* Getter functions
*====================*/
/**
* Return with a pointer to a built-in style and/or copy it to a variable
* @param style a style name from lv_pages_builtin_t enum
* @param copy copy the style to this variable. (NULL if unused)
* @return pointer to an lv_pages_t style
*/
lv_pages_t * lv_pages_get(lv_pages_builtin_t style, lv_pages_t * copy)
{
static bool style_inited = false;
/*Make the style initialization if it is not done yet*/
if(style_inited == false) {
lv_pages_init();
style_inited = true;
}
lv_pages_t * style_p;
switch(style) {
case LV_PAGES_DEF:
style_p = &lv_pages_def;
break;
case LV_PAGES_TRANSP:
style_p = &lv_pages_transp;
break;
default:
style_p = &lv_pages_def;
}
if(copy != NULL) {
if(style_p != NULL) memcpy(copy, style_p, sizeof(lv_pages_t));
else memcpy(copy, &lv_pages_def, sizeof(lv_pages_t));
}
return style_p;
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* 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 area_t * mask, lv_design_mode_t mode)
{
if(mode == LV_DESIGN_COVER_CHK) {
return ancestor_design_f(page, mask, mode);
} else if(mode == LV_DESIGN_DRAW_MAIN) {
ancestor_design_f(page, mask, mode);
} else if(mode == LV_DESIGN_DRAW_POST) { /*Draw the scroll bars finally*/
lv_page_ext_t * ext = lv_obj_get_ext(page);
lv_pages_t * style = lv_obj_get_style(page);
opa_t sb_opa = lv_obj_get_opa(page) * style->sb_opa /100;
/*Draw the scrollbars*/
if(ext->sbh_draw != 0) {
lv_draw_rect(&ext->sbh, mask, &style->sb_rects, sb_opa);
}
if(ext->sbv_draw != 0) {
lv_draw_rect(&ext->sbv, mask, &style->sb_rects, sb_opa);
}
}
return true;
}
/**
* 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 * page_ext = lv_obj_get_ext(page);
lv_pages_t * pages = lv_obj_get_style(page);
lv_obj_t * scrolling = page_ext->scrolling;
cord_t size_tmp;
cord_t scrolling_w = lv_obj_get_width(scrolling);
cord_t scrolling_h = lv_obj_get_height(scrolling);
cord_t hpad = pages->bg_rects.hpad;
cord_t vpad = pages->bg_rects.vpad;
cord_t obj_w = lv_obj_get_width(page);
cord_t obj_h = lv_obj_get_height(page);
cord_t page_x0 = page->cords.x1;
cord_t page_y0 = page->cords.y1;
lv_inv_area(&page_ext->sbh);
lv_inv_area(&page_ext->sbv);
/*Horizontal scrollbar*/
if(scrolling_w <= obj_w - 2 * hpad) { /*Full sized scroll bar*/
area_set_width(&page_ext->sbh, obj_w - pages->sb_width);
area_set_pos(&page_ext->sbh, page_x0, page_y0 + obj_h - pages->sb_width);
} else {
if(pages->sb_mode == LV_PAGE_SB_MODE_ON) {
page_ext->sbh_draw = 1;
}
size_tmp = (((obj_w - hpad) * (obj_w - pages->sb_width)) / scrolling_w);
area_set_width(&page_ext->sbh, size_tmp);
area_set_pos(&page_ext->sbh, page_x0 +
( -(lv_obj_get_x(scrolling) - hpad) * (obj_w - size_tmp - pages->sb_width)) /
(scrolling_w - obj_w + 2 * hpad),
page_y0 + obj_h - pages->sb_width);
}
/*Vertical scrollbar*/
if(scrolling_h <= obj_h - 2 * vpad) { /*Full sized scroll bar*/
area_set_height(&page_ext->sbv, obj_h - pages->sb_width);
area_set_pos(&page_ext->sbv, page_x0 + obj_w - pages->sb_width, 0);
} else {
if(pages->sb_mode == LV_PAGE_SB_MODE_ON) {
page_ext->sbv_draw = 1;
}
size_tmp = (((obj_h - vpad) * (obj_h - pages->sb_width)) / scrolling_h);
area_set_height(&page_ext->sbv, size_tmp);
area_set_pos(&page_ext->sbv, page_x0 + obj_w - pages->sb_width,
page_y0 +
(-(lv_obj_get_y(scrolling) - vpad) * (obj_h - size_tmp - pages->sb_width)) /
(scrolling_h - obj_h + 2 * vpad));
}
lv_inv_area(&page_ext->sbh);
lv_inv_area(&page_ext->sbv);
}
/**
* Initialize the page styles
*/
static void lv_pages_init(void)
{
/*Default style*/
lv_rects_get(LV_RECTS_DEF, &lv_pages_def.bg_rects);
lv_rects_get(LV_RECTS_DEF, &lv_pages_def.scrable_rects);
lv_pages_def.scrable_rects.objs.color = COLOR_WHITE;
lv_pages_def.scrable_rects.gcolor = COLOR_SILVER;
lv_pages_def.scrable_rects.bcolor = COLOR_GRAY;
lv_rects_get(LV_RECTS_DEF, &lv_pages_def.sb_rects);
lv_pages_def.sb_rects.objs.color = COLOR_BLACK;
lv_pages_def.sb_rects.gcolor = COLOR_BLACK;
lv_pages_def.sb_rects.bcolor = COLOR_WHITE;
lv_pages_def.sb_rects.bwidth = 1 * LV_STYLE_MULT;
lv_pages_def.sb_rects.round = 5 * LV_STYLE_MULT;
lv_pages_def.sb_width= 8 * LV_STYLE_MULT;
lv_pages_def.sb_opa=50;
lv_pages_def.sb_mode = LV_PAGE_SB_MODE_AUTO;
/*Transparent style*/
memcpy(&lv_pages_transp, &lv_pages_def, sizeof(lv_pages_t));
lv_pages_transp.scrable_rects.objs.transp = 1;
lv_pages_transp.scrable_rects.empty = 1;
lv_pages_transp.scrable_rects.bwidth = 0;
}
#endif
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