1# Demos for LVGL
2
3## Add the examples to your projects
41. demos can be found in the 'demos' folder once you clone the lvgl.
5
62. In the ***lv_conf.h*** or equivalent places, you can find demo related macros, change its value to enable or disable specified demos:
7
8```c
9...
10/*===================
11 * DEMO USAGE
12 ====================*/
13
14/*Show some widget. It might be required to increase `LV_MEM_SIZE` */
15#define LV_USE_DEMO_WIDGETS        0
16#if LV_USE_DEMO_WIDGETS
17#define LV_DEMO_WIDGETS_SLIDESHOW  0
18#endif
19
20/*Demonstrate the usage of encoder and keyboard*/
21#define LV_USE_DEMO_KEYPAD_AND_ENCODER     0
22
23/*Benchmark your system*/
24#define LV_USE_DEMO_BENCHMARK   0
25
26/*Stress test for LVGL*/
27#define LV_USE_DEMO_STRESS      0
28
29/*Music player demo*/
30#define LV_USE_DEMO_MUSIC       0
31#if LV_USE_DEMO_MUSIC
32# define LV_DEMO_MUSIC_SQUARE       0
33# define LV_DEMO_MUSIC_LANDSCAPE    0
34# define LV_DEMO_MUSIC_ROUND        0
35# define LV_DEMO_MUSIC_LARGE        0
36# define LV_DEMO_MUSIC_AUTO_PLAY    0
37#endif
38...
39```
40
413. If your development environment or toolchain does not add source files inside '***lvgl***' folder automatically, ensure the `demos` folder is included for compilation.
424. Include "***demos/lv_demos.h***" in your application source file, for example:
43
44```c
45//! main.c
46#include "lvgl.h"
47#include "demos/lv_demos.h"
48...
49```
50
51
52
53## Demos
54
55### Widgets
56Shows how the widgets look like out of the box using the built-in material theme.
57
58See in [widgets](https://github.com/lvgl/lvgl/tree/master/demos/widgets) folder.
59
60<img src="https://github.com/lvgl/lvgl/tree/master/demos/widgets/screenshot1.png?raw=true" width=600px alt="Basic demo to show the widgets of LVGL">
61
62For running this demo properly, please make sure **LV_MEM_SIZE** is at least **38KB** (and **48KB** is recommended):
63
64```c
65#define LV_MEME_SIZE    (38ul * 1024ul)
66```
67
68
69
70### Music player
71The music player demo shows what kind of modern, smartphone-like user interfaces can be created on LVGL. It works the best with display with 480x272 or 272x480 resolution.
72
73See in [music](https://github.com/lvgl/lvgl/tree/master/demos/music) folder.
74
75<img src="https://github.com/lvgl/lvgl/tree/master/demos/music/screenshot1.gif?raw=true" width=600px alt="Music player demo with LVGL">
76
77### Keypad and encoder
78LVGL allows you to control the widgets with a keypad and/or encoder without a touchpad. This demo shows how to handle buttons, drop-down lists, rollers, sliders, switches, and text inputs without touchpad.
79Learn more about the touchpad-less usage of LVGL [here](https://docs.lvgl.io/master/overview/indev.html#keypad-and-encoder).
80
81See in [keypad_encoder](https://github.com/lvgl/lvgl/tree/master/demos/keypad_encoder) folder.
82
83<img src="https://github.com/lvgl/lvgl/tree/master/demos/keypad_encoder/screenshot1.png?raw=true" width=600px alt="Keypad and encoder navigation in LVGL embedded GUI library">
84
85### Benchmark
86A demo to measure the performance of LVGL or to compare different settings.
87See in [benchmark](https://github.com/lvgl/lvgl/tree/master/demos/benchmark) folder.
88<img src="https://github.com/lvgl/lvgl/tree/master/demos/benchmark/screenshot1.png?raw=true" width=600px alt="Benchmark demo with LVGL embedded GUI library">
89
90### Stress
91A stress test for LVGL. It contains a lot of object creation, deletion, animations, style usage, and so on. It can be used if there is any memory corruption during heavy usage or any memory leaks.
92See in [stress](https://github.com/lvgl/lvgl/tree/master/demos/stress) folder.
93<img src="https://github.com/lvgl/lvgl/tree/master/demos/stress/screenshot1.png?raw=true" width=600px alt="Stress test for LVGL">
94
95## Contributing
96For contribution and coding style guidelines, please refer to the file docs/CONTRIBUTING.md in the main LVGL repo:
97  https://github.com/lvgl/lvgl
98