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This commit is contained in:
Daniel Stoppek
2024-12-09 19:47:18 +01:00
parent b55a8cd2bc
commit 528e862838
3471 changed files with 1105029 additions and 0 deletions
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libraries/lvgl/examples/styles/lv_example_style_18.c Normal file
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#include "../lv_examples.h"
#if LV_BUILD_EXAMPLES
#if LV_USE_DRAW_SW_COMPLEX_GRADIENTS
/**
* Using various gradients for button background
*/
void lv_example_style_18(void)
{
static const lv_color_t grad_colors[2] = {
LV_COLOR_MAKE(0x26, 0xa0, 0xda),
LV_COLOR_MAKE(0x31, 0x47, 0x55),
};
/*Create a linear gradient going from the top left corner to the bottom at an angle, with reflected color map*/
static lv_style_t style_with_linear_gradient_bg;
static lv_grad_dsc_t linear_gradient_dsc; /*NOTE: the gradient descriptor must be static or global variable!*/
lv_style_init(&style_with_linear_gradient_bg);
lv_gradient_init_stops(&linear_gradient_dsc, grad_colors, NULL, NULL, sizeof(grad_colors) / sizeof(lv_color_t));
lv_grad_linear_init(&linear_gradient_dsc, lv_pct(0), lv_pct(0), lv_pct(20), lv_pct(100), LV_GRAD_EXTEND_REFLECT);
lv_style_set_bg_grad(&style_with_linear_gradient_bg, &linear_gradient_dsc);
lv_style_set_bg_opa(&style_with_linear_gradient_bg, LV_OPA_COVER);
/*Create a radial gradient with the center in the top left 1/3rd of the object, extending to the bottom right corner, with reflected color map*/
static lv_style_t style_with_radial_gradient_bg;
static lv_grad_dsc_t radial_gradient_dsc; /*NOTE: the gradient descriptor must be static or global variable!*/
lv_style_init(&style_with_radial_gradient_bg);
lv_gradient_init_stops(&radial_gradient_dsc, grad_colors, NULL, NULL, sizeof(grad_colors) / sizeof(lv_color_t));
lv_grad_radial_init(&radial_gradient_dsc, lv_pct(30), lv_pct(30), lv_pct(100), lv_pct(100), LV_GRAD_EXTEND_REFLECT);
lv_style_set_bg_grad(&style_with_radial_gradient_bg, &radial_gradient_dsc);
lv_style_set_bg_opa(&style_with_radial_gradient_bg, LV_OPA_COVER);
/*Create buttons with different gradient styles*/
lv_obj_t * btn;
lv_obj_t * label;
/*Simple horizontal gradient*/
btn = lv_button_create(lv_screen_active());
lv_obj_set_style_bg_color(btn, grad_colors[0], 0);
lv_obj_set_style_bg_grad_color(btn, grad_colors[1], 0);
lv_obj_set_style_bg_grad_dir(btn, LV_GRAD_DIR_HOR, 0);
lv_obj_set_size(btn, 150, 50);
lv_obj_align(btn, LV_ALIGN_CENTER, 0, -100);
label = lv_label_create(btn);
lv_label_set_text(label, "Horizontal");
lv_obj_center(label);
/*Simple vertical gradient*/
btn = lv_button_create(lv_screen_active());
lv_obj_set_style_bg_color(btn, grad_colors[0], 0);
lv_obj_set_style_bg_grad_color(btn, grad_colors[1], 0);
lv_obj_set_style_bg_grad_dir(btn, LV_GRAD_DIR_VER, 0);
lv_obj_set_size(btn, 150, 50);
lv_obj_align(btn, LV_ALIGN_CENTER, 0, -40);
label = lv_label_create(btn);
lv_label_set_text(label, "Vertical");
lv_obj_center(label);
/*Complex linear gradient*/
btn = lv_button_create(lv_screen_active());
lv_obj_add_style(btn, &style_with_linear_gradient_bg, 0);
lv_obj_set_size(btn, 150, 50);
lv_obj_align(btn, LV_ALIGN_CENTER, 0, 20);
label = lv_label_create(btn);
lv_label_set_text(label, "Linear");
lv_obj_center(label);
/*Complex radial gradient*/
btn = lv_button_create(lv_screen_active());
lv_obj_add_style(btn, &style_with_radial_gradient_bg, 0);
lv_obj_set_size(btn, 150, 50);
lv_obj_align(btn, LV_ALIGN_CENTER, 0, 80);
label = lv_label_create(btn);
lv_label_set_text(label, "Radial");
lv_obj_center(label);
}
#else
void lv_example_style_18(void)
{
lv_obj_t * label = lv_label_create(lv_screen_active());
lv_obj_set_width(label, LV_PCT(80));
lv_label_set_text(label, "LV_USE_DRAW_SW_COMPLEX_GRADIENTS is not enabled");
lv_label_set_long_mode(label, LV_LABEL_LONG_SCROLL_CIRCULAR);
lv_obj_center(label);
}
#endif /*LV_USE_DRAW_SW_COMPLEX_GRADIENTS*/
#endif /*LV_BUILD_EXAMPLES*/