/**
* Create images from variable and file
*/
void lv_tutorial_image(void)
{
/*************************
* IMAGE FROM SOURCE CODE
*************************/
lv_obj_t *img_src = lv_img_create(lv_scr_act(), NULL); /*Crate an image object*/
lv_img_set_src(img_src, &red_flower); /*Set the created file as image (a red fl ower)*/
lv_obj_set_pos(img_src, 10, 10); /*Set the positions*/
lv_obj_set_drag(img_src, true);
#if PC_FILES && USE_LV_FILESYSTEM
/**************************
* IMAGE FROM BINARY FILE
**************************/
/* Add a simple drive to open images from PC*/
lv_fs_drv_t pcfs_drv; /*A driver descriptor*/
memset(&pcfs_drv, 0, sizeof(lv_fs_drv_t)); /*Initialization*/
pcfs_drv.file_size = sizeof(pc_file_t); /*Set up fields...*/
pcfs_drv.letter = 'P';
pcfs_drv.open = pcfs_open;
pcfs_drv.close = pcfs_close;
pcfs_drv.read = pcfs_read;
pcfs_drv.seek = pcfs_seek;
pcfs_drv.tell = pcfs_tell;
lv_fs_add_drv(&pcfs_drv);
lv_obj_t *img_bin = lv_img_create(lv_scr_act(), NULL); /*Create an image object*/
/* Set the image's file according to the current color depth
* a blue flower picture*/
#if LV_COLOR_DEPTH == 8
lv_img_set_src(img_bin, "P:/lv_examples/lv_tutorial/6_images/blue_flower_8.bin");
#elif LV_COLOR_DEPTH == 16
lv_img_set_src(img_bin, "P:/lv_examples/lv_tutorial/6_images/blue_flower_16.bin");
#elif LV_COLOR_DEPTH == 24
lv_img_set_src(img_bin, "P:/lv_examples/lv_tutorial/6_images/blue_flower_24.bin");
#endif
lv_obj_align(img_bin, img_src, LV_ALIGN_OUT_RIGHT_TOP, 20, 0); /*Align next to the source image*/
lv_obj_set_drag(img_bin, true);
#endif
lv_obj_t * img_symbol = lv_img_create(lv_scr_act(), NULL);
lv_img_set_src(img_symbol, SYMBOL_OK);
lv_obj_set_drag(img_symbol, true);
lv_obj_align(img_symbol, img_src, LV_ALIGN_OUT_BOTTOM_LEFT, 0, 20); /*Align next to the source image*/
}
/**
* Close (Collapse) the drop down list
* @param ddlist pointer to drop down list object
* @param anim_en true: use animation; false: not use animations
*/
void lv_ddlist_close(lv_obj_t * ddlist, bool anim_en)
{
#if USE_LV_ANIMATION == 0
anim_en = false;
#endif
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
ext->opened = 0;
lv_obj_set_drag(lv_page_get_scrl(ddlist), false);
lv_ddlist_refr_size(ddlist, anim_en);
}
/**
* Called when a drop down list is released to open it or set new option
* @param ddlist pointer to a drop down list object
* @return LV_ACTION_RES_INV if the ddlist it deleted in the user callback else LV_ACTION_RES_OK
*/
static lv_res_t lv_ddlist_release_action(lv_obj_t * ddlist)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
if(ext->opened == 0) { /*Open the list*/
ext->opened = 1;
lv_obj_set_drag(lv_page_get_scrl(ddlist), true);
} else {
ext->opened = 0;
lv_obj_set_drag(lv_page_get_scrl(ddlist), false);
/*Search the clicked option*/
lv_indev_t *indev = lv_indev_get_act();
lv_point_t p;
lv_indev_get_point(indev, &p);
p.x -= ext->label->coords.x1;
p.y -= ext->label->coords.y1;
uint16_t letter_i;
letter_i = lv_label_get_letter_on(ext->label, &p);
uint16_t new_opt = 0;
const char * txt = lv_label_get_text(ext->label);
uint16_t i;
for(i = 0; i < letter_i; i++) {
if(txt[i] == '\n') new_opt ++;
}
ext->sel_opt_id = new_opt;
if(ext->action != NULL) {
ext->action(ddlist);
}
}
lv_ddlist_refr_size(ddlist, true);
return LV_RES_OK;
}
/**
* Create a roller object
* @param par pointer to an object, it will be the parent of the new roller
* @param copy pointer to a roller object, if not NULL then the new object will be copied from it
* @return pointer to the created roller
*/
lv_obj_t * lv_roller_create(lv_obj_t * par, lv_obj_t * copy)
{
/*Create the ancestor of roller*/
lv_obj_t * new_roller = lv_ddlist_create(par, copy);
lv_mem_assert(new_roller);
if(ancestor_scrl_signal == NULL) ancestor_scrl_signal = lv_obj_get_signal_func(lv_page_get_scrl(new_roller));
if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_func(new_roller);
/*Allocate the roller type specific extended data*/
lv_roller_ext_t * ext = lv_obj_allocate_ext_attr(new_roller, sizeof(lv_roller_ext_t));
lv_mem_assert(ext);
/*The signal and design functions are not copied so set them here*/
lv_obj_set_signal_func(new_roller, lv_roller_signal);
lv_obj_set_design_func(new_roller, lv_roller_design);
/*Init the new roller roller*/
if(copy == NULL) {
lv_obj_t * scrl = lv_page_get_scrl(new_roller);
lv_obj_set_drag(scrl, true); /*In ddlist is might be disabled*/
lv_page_set_rel_action(new_roller, NULL); /*Roller don't uses it (like ddlist)*/
lv_page_set_scrl_fit(new_roller, true, false); /*Height is specified directly*/
lv_ddlist_open(new_roller, false);
lv_ddlist_set_anim_time(new_roller, LV_ROLLER_ANIM_TIME);
lv_roller_set_visible_row_count(new_roller, 3);
lv_label_set_align(ext->ddlist.label, LV_LABEL_ALIGN_CENTER);
lv_obj_set_signal_func(scrl, lv_roller_scrl_signal);
/*Set the default styles*/
lv_theme_t *th = lv_theme_get_current();
if(th) {
lv_roller_set_style(new_roller, LV_ROLLER_STYLE_BG, th->roller.bg);
lv_roller_set_style(new_roller, LV_ROLLER_STYLE_SEL, th->roller.sel);
} else {
/*Let the ddlist's style*/
lv_obj_refresh_style(new_roller); /*To set scrollable size automatically*/
}
}
/*Copy an existing roller*/
else {
lv_obj_t * scrl = lv_page_get_scrl(new_roller);
lv_ddlist_open(new_roller, false);
lv_obj_set_signal_func(scrl, lv_roller_scrl_signal);
lv_obj_refresh_style(new_roller); /*Refresh the style with new signal function*/
}
return new_roller;
}
/**
* Create a drop down list objects
* @param par pointer to an object, it will be the parent of the new drop down list
* @param copy pointer to a drop down list object, if not NULL then the new object will be copied from it
* @return pointer to the created drop down list
*/
lv_obj_t * lv_ddlist_create(lv_obj_t * par, lv_obj_t * copy)
{
/*Create the ancestor drop down list*/
lv_obj_t * new_ddlist = lv_page_create(par, copy);
lv_mem_assert(new_ddlist);
if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_func(new_ddlist);
if(ancestor_scrl_signal == NULL) ancestor_scrl_signal = lv_obj_get_signal_func(lv_page_get_scrl(new_ddlist));
if(ancestor_design == NULL) ancestor_design = lv_obj_get_design_func(new_ddlist);
/*Allocate the drop down list type specific extended data*/
lv_ddlist_ext_t * ext = lv_obj_allocate_ext_attr(new_ddlist, sizeof(lv_ddlist_ext_t));
lv_mem_assert(ext);
/*Initialize the allocated 'ext' */
ext->label = NULL;
ext->action = NULL;
ext->opened = 0;
ext->fix_height = 0;
ext->sel_opt_id = 0;
ext->sel_opt_id_ori = 0;
ext->option_cnt = 0;
ext->anim_time = LV_DDLIST_ANIM_TIME;
ext->sel_style = &lv_style_plain_color;
/*The signal and design functions are not copied so set them here*/
lv_obj_set_signal_func(new_ddlist, lv_ddlist_signal);
lv_obj_set_signal_func(lv_page_get_scrl(new_ddlist), lv_ddlist_scrl_signal);
lv_obj_set_design_func(new_ddlist, lv_ddlist_design);
/*Init the new drop down list drop down list*/
if(copy == NULL) {
lv_obj_t * scrl = lv_page_get_scrl(new_ddlist);
lv_obj_set_drag(scrl, false);
lv_page_set_scrl_fit(new_ddlist, true, true);
ext->label = lv_label_create(new_ddlist, NULL);
lv_cont_set_fit(new_ddlist, true, false);
lv_page_set_rel_action(new_ddlist, lv_ddlist_release_action);
lv_page_set_sb_mode(new_ddlist, LV_SB_MODE_DRAG);
lv_page_set_style(new_ddlist, LV_PAGE_STYLE_SCRL, &lv_style_transp_tight);
lv_ddlist_set_options(new_ddlist, "Option 1\nOption 2\nOption 3");
/*Set the default styles*/
lv_theme_t *th = lv_theme_get_current();
if(th) {
lv_ddlist_set_style(new_ddlist, LV_DDLIST_STYLE_BG, th->ddlist.bg);
lv_ddlist_set_style(new_ddlist, LV_DDLIST_STYLE_SEL,th->ddlist.sel);
lv_ddlist_set_style(new_ddlist, LV_DDLIST_STYLE_SB, th->ddlist.sb);
} else {
lv_ddlist_set_style(new_ddlist, LV_DDLIST_STYLE_BG, &lv_style_pretty);
lv_ddlist_set_style(new_ddlist, LV_DDLIST_STYLE_SEL, &lv_style_plain_color);
lv_ddlist_set_style(new_ddlist, LV_DDLIST_STYLE_SB, &lv_style_pretty_color);
}
}
/*Copy an existing drop down list*/
else {
lv_ddlist_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
ext->label = lv_label_create(new_ddlist, copy_ext->label);
lv_label_set_text(ext->label, lv_label_get_text(copy_ext->label));
ext->sel_opt_id = copy_ext->sel_opt_id;
ext->fix_height = copy_ext->fix_height;
ext->action = copy_ext->action;
ext->option_cnt = copy_ext->option_cnt;
ext->sel_style = copy_ext->sel_style;
ext->anim_time = copy_ext->anim_time;
/*Refresh the style with new signal function*/
lv_obj_refresh_style(new_ddlist);
}
return new_ddlist;
}
/**
* 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_cont_create(par, copy);
lv_mem_assert(new_page);
if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_func(new_page);
if(ancestor_design == NULL) ancestor_design = lv_obj_get_design_func(new_page);
/*Allocate the object type specific extended data*/
lv_page_ext_t * ext = lv_obj_allocate_ext_attr(new_page, sizeof(lv_page_ext_t));
lv_mem_assert(ext);
ext->scrl = NULL;
ext->pr_action = NULL;
ext->rel_action = NULL;
ext->sb.hor_draw = 0;
ext->sb.ver_draw = 0;
ext->sb.style = &lv_style_pretty;
ext->sb.mode = LV_SB_MODE_AUTO;
/*Init the new page object*/
if(copy == NULL) {
ext->scrl = lv_cont_create(new_page, NULL);
lv_obj_set_signal_func(ext->scrl, lv_page_scrollable_signal);
lv_obj_set_design_func(ext->scrl, lv_scrl_design);
lv_obj_set_drag(ext->scrl, true);
lv_obj_set_drag_throw(ext->scrl, true);
lv_obj_set_protect(ext->scrl, LV_PROTECT_PARENT | LV_PROTECT_PRESS_LOST);
lv_cont_set_fit(ext->scrl, false, true);
/* Add the signal function only if 'scrolling' is created
* because everything has to be ready before any signal is received*/
lv_obj_set_signal_func(new_page, lv_page_signal);
lv_obj_set_design_func(new_page, lv_page_design);
lv_page_set_sb_mode(new_page, ext->sb.mode);
/*Set the default styles*/
lv_theme_t *th = lv_theme_get_current();
if(th) {
if(par == NULL){ /*Different styles if it is screen*/
lv_page_set_style(new_page, LV_PAGE_STYLE_BG, th->bg);
lv_page_set_style(new_page, LV_PAGE_STYLE_SCRL, &lv_style_transp);
} else {
lv_page_set_style(new_page, LV_PAGE_STYLE_BG, th->page.bg);
lv_page_set_style(new_page, LV_PAGE_STYLE_SCRL, th->page.scrl);
}
lv_page_set_style(new_page, LV_PAGE_STYLE_SB, th->page.sb);
} else {
lv_page_set_style(new_page, LV_PAGE_STYLE_BG, &lv_style_pretty_color);
lv_page_set_style(new_page, LV_PAGE_STYLE_SCRL, &lv_style_pretty);
lv_page_set_style(new_page, LV_PAGE_STYLE_SB, &lv_style_pretty_color);
}
} else {
lv_page_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
ext->scrl = lv_cont_create(new_page, copy_ext->scrl);
lv_obj_set_signal_func(ext->scrl, lv_page_scrollable_signal);
lv_page_set_pr_action(new_page, copy_ext->pr_action);
lv_page_set_rel_action(new_page, copy_ext->rel_action);
lv_page_set_sb_mode(new_page, copy_ext->sb.mode);
lv_page_set_style(new_page, LV_PAGE_STYLE_BG, lv_page_get_style(copy, LV_PAGE_STYLE_BG));
lv_page_set_style(new_page, LV_PAGE_STYLE_SCRL, lv_page_get_style(copy, LV_PAGE_STYLE_SCRL));
lv_page_set_style(new_page, LV_PAGE_STYLE_SB, lv_page_get_style(copy, LV_PAGE_STYLE_SB));
/* Add the signal function only if 'scrolling' is created
* because everything has to be ready before any signal is received*/
lv_obj_set_signal_func(new_page, lv_page_signal);
lv_obj_set_design_func(new_page, lv_page_design);
/*Refresh the style with new signal function*/
lv_obj_refresh_style(new_page);
}
lv_page_sb_refresh(new_page);
return new_page;
}
/**
* Glue the object to the page. After it the page can be moved (dragged) with this object too.
* @param obj pointer to an object on a page
* @param glue true: enable glue, false: disable glue
*/
void lv_page_glue_obj(lv_obj_t * obj, bool glue)
{
lv_obj_set_drag_parent(obj, glue);
lv_obj_set_drag(obj, glue);
}
