「App:Library:LVGL:docs:3rd party libraries:QR code」の版間の差分
提供: robot-jp wiki
ナビゲーションに移動検索に移動| 1行目: | 1行目: | ||
https://docs.lvgl.io/8.2/libs/qrcode.html | https://docs.lvgl.io/8.2/libs/qrcode.html | ||
__NOTOC__ | __NOTOC__ | ||
| + | = QR code = | ||
{| class="wikitable" | {| class="wikitable" | ||
!英文 | !英文 | ||
| 6行目: | 7行目: | ||
|- | |- | ||
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| + | QR code generation with LVGL. Uses QR-Code-generator by nayuki. | ||
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|} | |} | ||
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== Get started == | == Get started == | ||
| − | + | {| class="wikitable" | |
| + | !英文 | ||
| + | !自動翻訳 | ||
| + | |- | ||
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* Download or clone this repository | * Download or clone this repository | ||
** Download from GitHub | ** Download from GitHub | ||
** Clone: git clone <nowiki>https://github.com/lvgl/lv_lib_qrcode.git</nowiki> | ** Clone: git clone <nowiki>https://github.com/lvgl/lv_lib_qrcode.git</nowiki> | ||
| − | * Include the library: <code>#include "lv_lib_qrcode/lv_qrcode.h"</code> | + | * Include the library: <code style="color: #bb0000;">#include "lv_lib_qrcode/lv_qrcode.h"</code> |
* Test with the following code: | * Test with the following code: | ||
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/*Set data*/ | /*Set data*/ | ||
lv_qrcode_update(qr, data, strlen(data)); | lv_qrcode_update(qr, data, strlen(data)); | ||
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| + | |} | ||
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== Notes == | == Notes == | ||
| + | {| class="wikitable" | ||
| + | !英文 | ||
| + | !自動翻訳 | ||
| + | |- | ||
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| + | * QR codes with less data are smaller, but they scaled by an integer number to best fit to the given size. | ||
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| + | |} | ||
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== Example == | == Example == | ||
| + | {| class="wikitable" | ||
| + | !英文 | ||
| + | !自動翻訳 | ||
| + | |- | ||
| + | | | ||
=== Create a QR Code === | === Create a QR Code === | ||
[[file:LVGL docs 3rdPartyLibs QRcode 01.png|link=https://docs.lvgl.io/8.2/libs/qrcode.html#create-a-qr-code]] | [[file:LVGL docs 3rdPartyLibs QRcode 01.png|link=https://docs.lvgl.io/8.2/libs/qrcode.html#create-a-qr-code]] | ||
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| + | |} | ||
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== API == | == API == | ||
| + | {| class="wikitable" | ||
| + | !英文 | ||
| + | !自動翻訳 | ||
| + | |- | ||
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Functions | Functions | ||
| − | ; | + | ; lv_obj_t *lv_qrcode_create(lv_obj_t *parent, lv_coord_t size, lv_color_t dark_color, lv_color_t light_color) |
| − | : Create an empty QR code (an <code>lv_canvas</code>) object. | + | : Create an empty QR code (an <code style="color: #bb0000;">lv_canvas</code>) object. |
:; Parameters | :; Parameters | ||
| − | ::* parent -- point to an object where to | + | ::* parent -- point to an object where to create the QR code |
::* size -- width and height of the QR code | ::* size -- width and height of the QR code | ||
::* dark_color -- dark color of the QR code | ::* dark_color -- dark color of the QR code | ||
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:: pointer to the created QR code object | :: pointer to the created QR code object | ||
| − | ; | + | ; lv_res_t lv_qrcode_update(lv_obj_t *qrcode, const void *data, uint32_t data_len) |
: Set the data of a QR code object | : Set the data of a QR code object | ||
:; Parameters | :; Parameters | ||
| − | ::* qrcode -- pointer to aQ | + | ::* qrcode -- pointer to aQ code object |
::* data -- data to display | ::* data -- data to display | ||
::* data_len -- length of data in bytes | ::* data_len -- length of data in bytes | ||
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:: LV_RES_OK: if no error; LV_RES_INV: on error | :: LV_RES_OK: if no error; LV_RES_INV: on error | ||
| − | ; | + | ; void lv_qrcode_delete(lv_obj_t *qrcode) |
| − | : DEPRECATED: Use normal lv_obj_del | + | : DEPRECATED: Use normal lv_obj_del instead Delete a QR code object |
:; Parameters | :; Parameters | ||
:: qrcode -- pointer to a QR code object | :: qrcode -- pointer to a QR code object | ||
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Variables | Variables | ||
| − | ; | + | ; const lv_obj_class_t lv_qrcode_class |
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| − | + | |} | |
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2022年6月29日 (水) 17:02時点における版
https://docs.lvgl.io/8.2/libs/qrcode.html
QR code
| 英文 | 自動翻訳 |
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QR code generation with LVGL. Uses QR-Code-generator by nayuki. |
Get started
| 英文 | 自動翻訳 |
|---|---|
const char * data = "Hello world"; /*Create a 100x100 QR code*/ lv_obj_t * qr = lv_qrcode_create(lv_scr_act(), 100, lv_color_hex3(0x33f), lv_color_hex3(0xeef)); /*Set data*/ lv_qrcode_update(qr, data, strlen(data)); |
Notes
| 英文 | 自動翻訳 |
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Example
| 英文 | 自動翻訳 |
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Create a QR Code
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API
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Functions
Variables
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