little VGL for VC仿真

• 下载安装VS2019，下载种子链接如下

链接：https://pan.baidu.com/s/1sdbCoQqsPKs6uw_Qe0t52A  提取码：jzdk   

• 下载little VGL相关文件，链接如下

链接：https://pan.baidu.com/s/1KDx2Lr5rJK7K1e2B73YU4A  提取码：ns2p 

• 解压littlevgl.7z文件，并分别解压以下4个文件

• 用VS2019打开lv_sim_visual_studio_sdl.sln解决方案

• 点击确定，升级到最新版本

• 点击本地Windows调试器，会弹出一个错误窗口

• 出现错误的原因是，lv_drives,lv_examples,lvgl三个文件夹里是空文件夹

• 解决编译问题，分别将以下文件夹里的内容

• 分别复制到以下对应的文件夹中

• 分别将lv_drives,lv_examples,lvgl中的内容全部加到工程中

• 重新点击本地Windows调试器，编译通过，并运行成功

• 实例中主函数中调用了demo_create();

int main(int argc, char** argv)
{
    /*Initialize LittlevGL*/
    lv_init();

    /*Initialize the HAL for LittlevGL*/
    hal_init();

    /*
     * Demo, benchmark, tests and tutorial.
     *
     * Uncomment any one (and only one) of the functions below to run that
     * particular demo, test or tutorial.
     */

     demo_create();
    //benchmark_create();
    //lv_test_theme_1(lv_theme_night_init(210, NULL));
    //lv_test_theme_1(lv_theme_night_init(100, NULL));
    //lv_test_theme_1(lv_theme_material_init(210, NULL));
    //lv_test_theme_1(lv_theme_alien_init(210, NULL));
    //lv_test_theme_1(lv_theme_zen_init(210, NULL));
    //lv_test_theme_1(lv_theme_nemo_init(210, NULL));
    //lv_test_theme_1(lv_theme_mono_init(210, NULL));
    //lv_test_theme_1(lv_theme_default_init(210, NULL));
    //lv_tutorial_keyboard(kb_indev);

    while (1) {
        /* Periodically call the lv_task handler.
        * It could be done in a timer interrupt or an OS task too.*/
        lv_task_handler();
        Sleep(10);       /*Just to let the system breathe */
    }

    return 0;
}

•  demo_create()的实现

/**
 * Create a demo application
 */
void demo_create(void)
{
    lv_coord_t hres = lv_disp_get_hor_res(NULL);
    lv_coord_t vres = lv_disp_get_ver_res(NULL);

#if LV_DEMO_WALLPAPER
    lv_obj_t * wp = lv_img_create(lv_disp_get_scr_act(NULL), NULL);
    lv_img_set_src(wp, &img_bubble_pattern);
    lv_obj_set_width(wp, hres * 4);
    lv_obj_set_protect(wp, LV_PROTECT_POS);
#endif

    static lv_style_t style_tv_btn_bg;
    lv_style_copy(&style_tv_btn_bg, &lv_style_plain);
    style_tv_btn_bg.body.main_color = lv_color_hex(0x487fb7);
    style_tv_btn_bg.body.grad_color = lv_color_hex(0x487fb7);
    style_tv_btn_bg.body.padding.top = 0;
    style_tv_btn_bg.body.padding.bottom = 0;

    static lv_style_t style_tv_btn_rel;
    lv_style_copy(&style_tv_btn_rel, &lv_style_btn_rel);
    style_tv_btn_rel.body.opa = LV_OPA_TRANSP;
    style_tv_btn_rel.body.border.width = 0;

    static lv_style_t style_tv_btn_pr;
    lv_style_copy(&style_tv_btn_pr, &lv_style_btn_pr);
    style_tv_btn_pr.body.radius = 0;
    style_tv_btn_pr.body.opa = LV_OPA_50;
    style_tv_btn_pr.body.main_color = LV_COLOR_WHITE;
    style_tv_btn_pr.body.grad_color = LV_COLOR_WHITE;
    style_tv_btn_pr.body.border.width = 0;
    style_tv_btn_pr.text.color = LV_COLOR_GRAY;

    lv_obj_t * tv = lv_tabview_create(lv_disp_get_scr_act(NULL), NULL);
    lv_obj_set_size(tv, hres, vres);

#if LV_DEMO_WALLPAPER
    lv_obj_set_parent(wp, ((lv_tabview_ext_t *) tv->ext_attr)->content);
    lv_obj_set_pos(wp, 0, -5);
#endif

    lv_obj_t * tab1 = lv_tabview_add_tab(tv, "Write");
    lv_obj_t * tab2 = lv_tabview_add_tab(tv, "List");
    lv_obj_t * tab3 = lv_tabview_add_tab(tv, "Chart");

#if LV_DEMO_WALLPAPER == 0
    /*Blue bg instead of wallpaper*/
    lv_tabview_set_style(tv, LV_TABVIEW_STYLE_BG, &style_tv_btn_bg);
#endif
    lv_tabview_set_style(tv, LV_TABVIEW_STYLE_BTN_BG, &style_tv_btn_bg);
    lv_tabview_set_style(tv, LV_TABVIEW_STYLE_INDIC, &lv_style_plain);
    lv_tabview_set_style(tv, LV_TABVIEW_STYLE_BTN_REL, &style_tv_btn_rel);
    lv_tabview_set_style(tv, LV_TABVIEW_STYLE_BTN_PR, &style_tv_btn_pr);
    lv_tabview_set_style(tv, LV_TABVIEW_STYLE_BTN_TGL_REL, &style_tv_btn_rel);
    lv_tabview_set_style(tv, LV_TABVIEW_STYLE_BTN_TGL_PR, &style_tv_btn_pr);

    write_create(tab1);
    list_create(tab2);
    chart_create(tab3);

#if LV_DEMO_SLIDE_SHOW
    lv_task_create(tab_switcher, 3000, LV_TASK_PRIO_MID, tv);
#endif
}

具体代码分析，请参考官网little vgl使用说明