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A39模拟器

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liulin
2024-03-07 11:03:18 +08:00
parent cb2cc0d66f
commit 33e6eb45b3
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26
MXC-A39/lvgl/examples/widgets/dropdown/index.rst Normal file
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C
^
Simple Drop down list
""""""""""""""""""""""
.. lv_example:: widgets/dropdown/lv_example_dropdown_1
:language: c
Drop down in four directions
""""""""""""""""""""""""""""
.. lv_example:: widgets/dropdown/lv_example_dropdown_2
:language: c
Menu
""""""""""""
.. lv_example:: widgets/dropdown/lv_example_dropdown_3
:language: c
MicroPython
^^^^^^^^^^^
No examples yet.

35
MXC-A39/lvgl/examples/widgets/dropdown/lv_example_dropdown_1.c Normal file
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#include "../../lv_examples.h"
#if LV_USE_DROPDOWN && LV_BUILD_EXAMPLES
static void event_handler(lv_event_t * e)
{
lv_event_code_t code = lv_event_get_code(e);
lv_obj_t * obj = lv_event_get_target(e);
if(code == LV_EVENT_VALUE_CHANGED) {
char buf[32];
lv_dropdown_get_selected_str(obj, buf, sizeof(buf));
LV_LOG_USER("Option: %s", buf);
}
}
void lv_example_dropdown_1(void)
{
/*Create a normal drop down list*/
lv_obj_t * dd = lv_dropdown_create(lv_scr_act());
lv_dropdown_set_options(dd, "Apple\n"
"Banana\n"
"Orange\n"
"Cherry\n"
"Grape\n"
"Raspberry\n"
"Melon\n"
"Orange\n"
"Lemon\n"
"Nuts");
lv_obj_align(dd, LV_ALIGN_TOP_MID, 0, 20);
lv_obj_add_event_cb(dd, event_handler, LV_EVENT_ALL, NULL);
}
#endif

21
MXC-A39/lvgl/examples/widgets/dropdown/lv_example_dropdown_1.py Normal file
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def event_handler(obj, event):
if event == lv.EVENT.VALUE_CHANGED:
option = " "*10 # should be large enough to store the option
obj.get_selected_str(option, len(option))
# .strip() removes trailing spaces
print("Option: \"%s\"" % option.strip())
# Create a drop down list
ddlist = lv.ddlist(lv.scr_act())
ddlist.set_options("\n".join([
"Apple",
"Banana",
"Orange",
"Melon",
"Grape",
"Raspberry"]))
ddlist.set_fix_width(150)
ddlist.set_draw_arrow(True)
ddlist.align(None, lv.ALIGN.IN_TOP_MID, 0, 20)
ddlist.set_event_cb(event_handler)

39
MXC-A39/lvgl/examples/widgets/dropdown/lv_example_dropdown_2.c Normal file
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#include "../../lv_examples.h"
#if LV_USE_DROPDOWN && LV_BUILD_EXAMPLES
/**
* Create a drop down, up, left and right menus
*/
void lv_example_dropdown_2(void)
{
static const char * opts = "Apple\n"
"Banana\n"
"Orange\n"
"Melon";
lv_obj_t * dd;
dd = lv_dropdown_create(lv_scr_act());
lv_dropdown_set_options_static(dd, opts);
lv_obj_align(dd, LV_ALIGN_TOP_MID, 0, 10);
dd = lv_dropdown_create(lv_scr_act());
lv_dropdown_set_options_static(dd, opts);
lv_dropdown_set_dir(dd, LV_DIR_BOTTOM);
lv_dropdown_set_symbol(dd, LV_SYMBOL_UP);
lv_obj_align(dd, LV_ALIGN_BOTTOM_MID, 0, -10);
dd = lv_dropdown_create(lv_scr_act());
lv_dropdown_set_options_static(dd, opts);
lv_dropdown_set_dir(dd, LV_DIR_RIGHT);
lv_dropdown_set_symbol(dd, LV_SYMBOL_RIGHT);
lv_obj_align(dd, LV_ALIGN_LEFT_MID, 10, 0);
dd = lv_dropdown_create(lv_scr_act());
lv_dropdown_set_options_static(dd, opts);
lv_dropdown_set_dir(dd, LV_DIR_LEFT);
lv_dropdown_set_symbol(dd, LV_SYMBOL_LEFT);
lv_obj_align(dd, LV_ALIGN_RIGHT_MID, -10, 0);
}
#endif

23
MXC-A39/lvgl/examples/widgets/dropdown/lv_example_dropdown_2.py Normal file
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# Create a drop UP list by applying auto realign
# Create a drop down list
ddlist = lv.ddlist(lv.scr_act())
ddlist.set_options("\n".join([
"Apple",
"Banana",
"Orange",
"Melon",
"Grape",
"Raspberry"]))
ddlist.set_fix_width(150)
ddlist.set_fix_height(150)
ddlist.set_draw_arrow(True)
# Enable auto-realign when the size changes.
# It will keep the bottom of the ddlist fixed
ddlist.set_auto_realign(True)
# It will be called automatically when the size changes
ddlist.align(None, lv.ALIGN.IN_BOTTOM_MID, 0, -20)

43
MXC-A39/lvgl/examples/widgets/dropdown/lv_example_dropdown_3.c Normal file
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#include "../../lv_examples.h"
#if LV_USE_DROPDOWN && LV_BUILD_EXAMPLES
static void event_cb(lv_event_t * e)
{
lv_obj_t * dropdown = lv_event_get_target(e);
char buf[64];
lv_dropdown_get_selected_str(dropdown, buf, sizeof(buf));
LV_LOG_USER("'%s' is selected", buf);
}
/**
* Create a menu from a drop-down list and show some drop-down list features and styling
*/
void lv_example_dropdown_3(void)
{
/*Create a drop down list*/
lv_obj_t * dropdown = lv_dropdown_create(lv_scr_act());
lv_obj_align(dropdown, LV_ALIGN_TOP_LEFT, 10, 10);
lv_dropdown_set_options(dropdown, "New project\n"
"New file\n"
"Save\n"
"Save as ...\n"
"Open project\n"
"Recent projects\n"
"Preferences\n"
"Exit");
/*Set a fixed text to display on the button of the drop-down list*/
lv_dropdown_set_text(dropdown, "Menu");
/*Use a custom image as down icon and flip it when the list is opened*/
LV_IMG_DECLARE(img_caret_down)
lv_dropdown_set_symbol(dropdown, &img_caret_down);
lv_obj_set_style_transform_angle(dropdown, 1800, LV_PART_INDICATOR | LV_STATE_CHECKED);
/*In a menu we don't need to show the last clicked item*/
lv_dropdown_set_selected_highlight(dropdown, false);
lv_obj_add_event_cb(dropdown, event_cb, LV_EVENT_VALUE_CHANGED, NULL);
}
#endif