Schnacke/SmartGrow
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

init Files

Browse Source
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
Download Patch File Download Diff File Expand all files Collapse all files

42
libraries/lvgl/examples/widgets/scale/index.rst Normal file
View File

@@ -0,0 +1,42 @@
A simple horizontal scale
"""""""""""""""""""""""""
.. lv_example:: widgets/scale/lv_example_scale_1
:language: c
An vertical scale with section and custom styling
"""""""""""""""""""""""""""""""""""""""""""""""""
.. lv_example:: widgets/scale/lv_example_scale_2
:language: c
A simple round scale
""""""""""""""""""""
.. lv_example:: widgets/scale/lv_example_scale_3
:language: c
A round scale with section and custom styling
"""""""""""""""""""""""""""""""""""""""""""""
.. lv_example:: widgets/scale/lv_example_scale_4
:language: c
An scale with section and custom styling
""""""""""""""""""""""""""""""""""""""""
.. lv_example:: widgets/scale/lv_example_scale_5
:language: c
A round scale with multiple needles, resembling a clock
"""""""""""""""""""""""""""""""""""""""""""""""""""""""
.. lv_example:: widgets/scale/lv_example_scale_6
:language: c
Customizing scale major tick label color with `LV_EVENT_DRAW_TASK_ADDED` event
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
.. lv_example:: widgets/scale/lv_example_scale_7
:language: c

24
libraries/lvgl/examples/widgets/scale/lv_example_scale_1.c Normal file
View File

@@ -0,0 +1,24 @@
#include "../../lv_examples.h"
#if LV_USE_SCALE && LV_BUILD_EXAMPLES
/**
* A simple horizontal scale
*/
void lv_example_scale_1(void)
{
lv_obj_t * scale = lv_scale_create(lv_screen_active());
lv_obj_set_size(scale, lv_pct(80), 100);
lv_scale_set_mode(scale, LV_SCALE_MODE_HORIZONTAL_BOTTOM);
lv_obj_center(scale);
lv_scale_set_label_show(scale, true);
lv_scale_set_total_tick_count(scale, 31);
lv_scale_set_major_tick_every(scale, 5);
lv_obj_set_style_length(scale, 5, LV_PART_ITEMS);
lv_obj_set_style_length(scale, 10, LV_PART_INDICATOR);
lv_scale_set_range(scale, 10, 40);
}
#endif

89
libraries/lvgl/examples/widgets/scale/lv_example_scale_2.c Normal file
View File

@@ -0,0 +1,89 @@
#include "../../lv_examples.h"
#if LV_USE_SCALE && LV_BUILD_EXAMPLES
/**
* An vertical scale with section and custom styling
*/
void lv_example_scale_2(void)
{
lv_obj_t * scale = lv_scale_create(lv_screen_active());
lv_obj_set_size(scale, 60, 200);
lv_scale_set_label_show(scale, true);
lv_scale_set_mode(scale, LV_SCALE_MODE_VERTICAL_RIGHT);
lv_obj_center(scale);
lv_scale_set_total_tick_count(scale, 21);
lv_scale_set_major_tick_every(scale, 5);
lv_obj_set_style_length(scale, 10, LV_PART_INDICATOR);
lv_obj_set_style_length(scale, 5, LV_PART_ITEMS);
lv_scale_set_range(scale, 0, 100);
static const char * custom_labels[] = {"0 °C", "25 °C", "50 °C", "75 °C", "100 °C", NULL};
lv_scale_set_text_src(scale, custom_labels);
static lv_style_t indicator_style;
lv_style_init(&indicator_style);
/* Label style properties */
lv_style_set_text_font(&indicator_style, LV_FONT_DEFAULT);
lv_style_set_text_color(&indicator_style, lv_palette_darken(LV_PALETTE_BLUE, 3));
/* Major tick properties */
lv_style_set_line_color(&indicator_style, lv_palette_darken(LV_PALETTE_BLUE, 3));
lv_style_set_width(&indicator_style, 10U); /*Tick length*/
lv_style_set_line_width(&indicator_style, 2U); /*Tick width*/
lv_obj_add_style(scale, &indicator_style, LV_PART_INDICATOR);
static lv_style_t minor_ticks_style;
lv_style_init(&minor_ticks_style);
lv_style_set_line_color(&minor_ticks_style, lv_palette_lighten(LV_PALETTE_BLUE, 2));
lv_style_set_width(&minor_ticks_style, 5U); /*Tick length*/
lv_style_set_line_width(&minor_ticks_style, 2U); /*Tick width*/
lv_obj_add_style(scale, &minor_ticks_style, LV_PART_ITEMS);
static lv_style_t main_line_style;
lv_style_init(&main_line_style);
/* Main line properties */
lv_style_set_line_color(&main_line_style, lv_palette_darken(LV_PALETTE_BLUE, 3));
lv_style_set_line_width(&main_line_style, 2U); // Tick width
lv_obj_add_style(scale, &main_line_style, LV_PART_MAIN);
/* Add a section */
static lv_style_t section_minor_tick_style;
static lv_style_t section_label_style;
static lv_style_t section_main_line_style;
lv_style_init(&section_label_style);
lv_style_init(&section_minor_tick_style);
lv_style_init(&section_main_line_style);
/* Label style properties */
lv_style_set_text_font(&section_label_style, LV_FONT_DEFAULT);
lv_style_set_text_color(&section_label_style, lv_palette_darken(LV_PALETTE_RED, 3));
lv_style_set_line_color(&section_label_style, lv_palette_darken(LV_PALETTE_RED, 3));
lv_style_set_line_width(&section_label_style, 5U); /*Tick width*/
lv_style_set_line_color(&section_minor_tick_style, lv_palette_lighten(LV_PALETTE_RED, 2));
lv_style_set_line_width(&section_minor_tick_style, 4U); /*Tick width*/
/* Main line properties */
lv_style_set_line_color(&section_main_line_style, lv_palette_darken(LV_PALETTE_RED, 3));
lv_style_set_line_width(&section_main_line_style, 4U); /*Tick width*/
/* Configure section styles */
lv_scale_section_t * section = lv_scale_add_section(scale);
lv_scale_section_set_range(section, 75, 100);
lv_scale_section_set_style(section, LV_PART_INDICATOR, &section_label_style);
lv_scale_section_set_style(section, LV_PART_ITEMS, &section_minor_tick_style);
lv_scale_section_set_style(section, LV_PART_MAIN, &section_main_line_style);
lv_obj_set_style_bg_color(scale, lv_palette_main(LV_PALETTE_BLUE_GREY), 0);
lv_obj_set_style_bg_opa(scale, LV_OPA_50, 0);
lv_obj_set_style_pad_left(scale, 8, 0);
lv_obj_set_style_radius(scale, 8, 0);
lv_obj_set_style_pad_ver(scale, 20, 0);
}
#endif

100
libraries/lvgl/examples/widgets/scale/lv_example_scale_3.c Normal file
View File

@@ -0,0 +1,100 @@
#include "../../lv_examples.h"
#if LV_USE_SCALE && LV_BUILD_EXAMPLES
LV_IMAGE_DECLARE(img_hand);
lv_obj_t * needle_line;
lv_obj_t * needle_img;
static void set_needle_line_value(void * obj, int32_t v)
{
lv_scale_set_line_needle_value(obj, needle_line, 60, v);
}
static void set_needle_img_value(void * obj, int32_t v)
{
lv_scale_set_image_needle_value(obj, needle_img, v);
}
/**
* A simple round scale
*/
void lv_example_scale_3(void)
{
lv_obj_t * scale_line = lv_scale_create(lv_screen_active());
lv_obj_set_size(scale_line, 150, 150);
lv_scale_set_mode(scale_line, LV_SCALE_MODE_ROUND_INNER);
lv_obj_set_style_bg_opa(scale_line, LV_OPA_COVER, 0);
lv_obj_set_style_bg_color(scale_line, lv_palette_lighten(LV_PALETTE_RED, 5), 0);
lv_obj_set_style_radius(scale_line, LV_RADIUS_CIRCLE, 0);
lv_obj_set_style_clip_corner(scale_line, true, 0);
lv_obj_align(scale_line, LV_ALIGN_LEFT_MID, LV_PCT(2), 0);
lv_scale_set_label_show(scale_line, true);
lv_scale_set_total_tick_count(scale_line, 31);
lv_scale_set_major_tick_every(scale_line, 5);
lv_obj_set_style_length(scale_line, 5, LV_PART_ITEMS);
lv_obj_set_style_length(scale_line, 10, LV_PART_INDICATOR);
lv_scale_set_range(scale_line, 10, 40);
lv_scale_set_angle_range(scale_line, 270);
lv_scale_set_rotation(scale_line, 135);
needle_line = lv_line_create(scale_line);
lv_obj_set_style_line_width(needle_line, 6, LV_PART_MAIN);
lv_obj_set_style_line_rounded(needle_line, true, LV_PART_MAIN);
lv_anim_t anim_scale_line;
lv_anim_init(&anim_scale_line);
lv_anim_set_var(&anim_scale_line, scale_line);
lv_anim_set_exec_cb(&anim_scale_line, set_needle_line_value);
lv_anim_set_duration(&anim_scale_line, 1000);
lv_anim_set_repeat_count(&anim_scale_line, LV_ANIM_REPEAT_INFINITE);
lv_anim_set_playback_duration(&anim_scale_line, 1000);
lv_anim_set_values(&anim_scale_line, 10, 40);
lv_anim_start(&anim_scale_line);
lv_obj_t * scale_img = lv_scale_create(lv_screen_active());
lv_obj_set_size(scale_img, 150, 150);
lv_scale_set_mode(scale_img, LV_SCALE_MODE_ROUND_INNER);
lv_obj_set_style_bg_opa(scale_img, LV_OPA_COVER, 0);
lv_obj_set_style_bg_color(scale_img, lv_palette_lighten(LV_PALETTE_RED, 5), 0);
lv_obj_set_style_radius(scale_img, LV_RADIUS_CIRCLE, 0);
lv_obj_set_style_clip_corner(scale_img, true, 0);
lv_obj_align(scale_img, LV_ALIGN_RIGHT_MID, LV_PCT(-2), 0);
lv_scale_set_label_show(scale_img, true);
lv_scale_set_total_tick_count(scale_img, 31);
lv_scale_set_major_tick_every(scale_img, 5);
lv_obj_set_style_length(scale_img, 5, LV_PART_ITEMS);
lv_obj_set_style_length(scale_img, 10, LV_PART_INDICATOR);
lv_scale_set_range(scale_img, 10, 40);
lv_scale_set_angle_range(scale_img, 270);
lv_scale_set_rotation(scale_img, 135);
/* image must point to the right. E.g. -O------>*/
needle_img = lv_image_create(scale_img);
lv_image_set_src(needle_img, &img_hand);
lv_obj_align(needle_img, LV_ALIGN_CENTER, 47, -2);
lv_image_set_pivot(needle_img, 3, 4);
lv_anim_t anim_scale_img;
lv_anim_init(&anim_scale_img);
lv_anim_set_var(&anim_scale_img, scale_img);
lv_anim_set_exec_cb(&anim_scale_img, set_needle_img_value);
lv_anim_set_duration(&anim_scale_img, 1000);
lv_anim_set_repeat_count(&anim_scale_img, LV_ANIM_REPEAT_INFINITE);
lv_anim_set_playback_duration(&anim_scale_img, 1000);
lv_anim_set_values(&anim_scale_img, 10, 40);
lv_anim_start(&anim_scale_img);
}
#endif

83
libraries/lvgl/examples/widgets/scale/lv_example_scale_4.c Normal file
View File

@@ -0,0 +1,83 @@
#include "../../lv_examples.h"
#if LV_USE_SCALE && LV_BUILD_EXAMPLES
/**
* A round scale with section and custom styling
*/
void lv_example_scale_4(void)
{
lv_obj_t * scale = lv_scale_create(lv_screen_active());
lv_obj_set_size(scale, 150, 150);
lv_scale_set_label_show(scale, true);
lv_scale_set_mode(scale, LV_SCALE_MODE_ROUND_OUTER);
lv_obj_center(scale);
lv_scale_set_total_tick_count(scale, 21);
lv_scale_set_major_tick_every(scale, 5);
lv_obj_set_style_length(scale, 5, LV_PART_ITEMS);
lv_obj_set_style_length(scale, 10, LV_PART_INDICATOR);
lv_scale_set_range(scale, 0, 100);
static const char * custom_labels[] = {"0 °C", "25 °C", "50 °C", "75 °C", "100 °C", NULL};
lv_scale_set_text_src(scale, custom_labels);
static lv_style_t indicator_style;
lv_style_init(&indicator_style);
/* Label style properties */
lv_style_set_text_font(&indicator_style, LV_FONT_DEFAULT);
lv_style_set_text_color(&indicator_style, lv_palette_darken(LV_PALETTE_BLUE, 3));
/* Major tick properties */
lv_style_set_line_color(&indicator_style, lv_palette_darken(LV_PALETTE_BLUE, 3));
lv_style_set_width(&indicator_style, 10U); /*Tick length*/
lv_style_set_line_width(&indicator_style, 2U); /*Tick width*/
lv_obj_add_style(scale, &indicator_style, LV_PART_INDICATOR);
static lv_style_t minor_ticks_style;
lv_style_init(&minor_ticks_style);
lv_style_set_line_color(&minor_ticks_style, lv_palette_lighten(LV_PALETTE_BLUE, 2));
lv_style_set_width(&minor_ticks_style, 5U); /*Tick length*/
lv_style_set_line_width(&minor_ticks_style, 2U); /*Tick width*/
lv_obj_add_style(scale, &minor_ticks_style, LV_PART_ITEMS);
static lv_style_t main_line_style;
lv_style_init(&main_line_style);
/* Main line properties */
lv_style_set_arc_color(&main_line_style, lv_palette_darken(LV_PALETTE_BLUE, 3));
lv_style_set_arc_width(&main_line_style, 2U); /*Tick width*/
lv_obj_add_style(scale, &main_line_style, LV_PART_MAIN);
/* Add a section */
static lv_style_t section_minor_tick_style;
static lv_style_t section_label_style;
static lv_style_t section_main_line_style;
lv_style_init(&section_label_style);
lv_style_init(&section_minor_tick_style);
lv_style_init(&section_main_line_style);
/* Label style properties */
lv_style_set_text_font(&section_label_style, LV_FONT_DEFAULT);
lv_style_set_text_color(&section_label_style, lv_palette_darken(LV_PALETTE_RED, 3));
lv_style_set_line_color(&section_label_style, lv_palette_darken(LV_PALETTE_RED, 3));
lv_style_set_line_width(&section_label_style, 5U); /*Tick width*/
lv_style_set_line_color(&section_minor_tick_style, lv_palette_lighten(LV_PALETTE_RED, 2));
lv_style_set_line_width(&section_minor_tick_style, 4U); /*Tick width*/
/* Main line properties */
lv_style_set_arc_color(&section_main_line_style, lv_palette_darken(LV_PALETTE_RED, 3));
lv_style_set_arc_width(&section_main_line_style, 4U); /*Tick width*/
/* Configure section styles */
lv_scale_section_t * section = lv_scale_add_section(scale);
lv_scale_section_set_range(section, 75, 100);
lv_scale_section_set_style(section, LV_PART_INDICATOR, &section_label_style);
lv_scale_section_set_style(section, LV_PART_ITEMS, &section_minor_tick_style);
lv_scale_section_set_style(section, LV_PART_MAIN, &section_main_line_style);
}
#endif

78
libraries/lvgl/examples/widgets/scale/lv_example_scale_5.c Normal file
View File

@@ -0,0 +1,78 @@
#include "../../lv_examples.h"
#if LV_USE_SCALE && LV_BUILD_EXAMPLES
/**
* An scale with section and custom styling
*/
void lv_example_scale_5(void)
{
lv_obj_t * scale = lv_scale_create(lv_screen_active());
lv_obj_set_size(scale, lv_display_get_horizontal_resolution(NULL) / 2, lv_display_get_vertical_resolution(NULL) / 2);
lv_scale_set_label_show(scale, true);
lv_scale_set_total_tick_count(scale, 10);
lv_scale_set_major_tick_every(scale, 5);
lv_obj_set_style_length(scale, 5, LV_PART_ITEMS);
lv_obj_set_style_length(scale, 10, LV_PART_INDICATOR);
lv_scale_set_range(scale, 25, 35);
static const char * custom_labels[3] = {"One", "Two", NULL};
lv_scale_set_text_src(scale, custom_labels);
static lv_style_t indicator_style;
lv_style_init(&indicator_style);
/* Label style properties */
lv_style_set_text_font(&indicator_style, LV_FONT_DEFAULT);
lv_style_set_text_color(&indicator_style, lv_color_hex(0xff00ff));
/* Major tick properties */
lv_style_set_line_color(&indicator_style, lv_color_hex(0x00ff00));
lv_style_set_width(&indicator_style, 10U); // Tick length
lv_style_set_line_width(&indicator_style, 2U); // Tick width
lv_obj_add_style(scale, &indicator_style, LV_PART_INDICATOR);
static lv_style_t minor_ticks_style;
lv_style_init(&minor_ticks_style);
lv_style_set_line_color(&minor_ticks_style, lv_color_hex(0xff0000));
lv_style_set_width(&minor_ticks_style, 5U); // Tick length
lv_style_set_line_width(&minor_ticks_style, 2U); // Tick width
lv_obj_add_style(scale, &minor_ticks_style, LV_PART_ITEMS);
static lv_style_t main_line_style;
lv_style_init(&main_line_style);
/* Main line properties */
lv_style_set_line_color(&main_line_style, lv_color_hex(0x0000ff));
lv_style_set_line_width(&main_line_style, 2U); // Tick width
lv_obj_add_style(scale, &main_line_style, LV_PART_MAIN);
lv_obj_center(scale);
/* Add a section */
static lv_style_t section_minor_tick_style;
static lv_style_t section_label_style;
lv_style_init(&section_label_style);
lv_style_init(&section_minor_tick_style);
/* Label style properties */
lv_style_set_text_font(&section_label_style, LV_FONT_DEFAULT);
lv_style_set_text_color(&section_label_style, lv_color_hex(0xff0000));
lv_style_set_text_letter_space(&section_label_style, 10);
lv_style_set_text_opa(&section_label_style, LV_OPA_50);
lv_style_set_line_color(&section_label_style, lv_color_hex(0xff0000));
// lv_style_set_width(&section_label_style, 20U); // Tick length
lv_style_set_line_width(&section_label_style, 5U); // Tick width
lv_style_set_line_color(&section_minor_tick_style, lv_color_hex(0x0000ff));
// lv_style_set_width(&section_label_style, 20U); // Tick length
lv_style_set_line_width(&section_minor_tick_style, 4U); // Tick width
/* Configure section styles */
lv_scale_section_t * section = lv_scale_add_section(scale);
lv_scale_section_set_range(section, 25, 30);
lv_scale_section_set_style(section, LV_PART_INDICATOR, &section_label_style);
lv_scale_section_set_style(section, LV_PART_ITEMS, &section_minor_tick_style);
}
#endif

126
libraries/lvgl/examples/widgets/scale/lv_example_scale_6.c Normal file
View File

@@ -0,0 +1,126 @@
#include "../../lv_examples.h"
#if LV_USE_SCALE && LV_BUILD_EXAMPLES
#if LV_USE_FLOAT
#define my_PRIprecise "f"
#else
#define my_PRIprecise LV_PRId32
#endif
static lv_obj_t * scale;
static lv_obj_t * minute_hand;
static lv_obj_t * hour_hand;
static lv_point_precise_t minute_hand_points[2];
static int32_t hour;
static int32_t minute;
static void timer_cb(lv_timer_t * timer)
{
LV_UNUSED(timer);
minute++;
if(minute > 59) {
minute = 0;
hour++;
if(hour > 11) {
hour = 0;
}
}
/**
* the scale will store the needle line points in the existing
* point array if one was set with `lv_line_set_points_mutable`.
* Otherwise, it will allocate the needle line points.
*/
/* the scale will store the minute hand line points in `minute_hand_points` */
lv_scale_set_line_needle_value(scale, minute_hand, 60, minute);
/* log the points that were stored in the array */
LV_LOG_USER(
"minute hand points - "
"0: (%" my_PRIprecise ", %" my_PRIprecise "), "
"1: (%" my_PRIprecise ", %" my_PRIprecise ")",
minute_hand_points[0].x, minute_hand_points[0].y,
minute_hand_points[1].x, minute_hand_points[1].y
);
/* the scale will allocate the hour hand line points */
lv_scale_set_line_needle_value(scale, hour_hand, 40, hour * 5 + (minute / 12));
}
/**
* A round scale with multiple needles, resembling a clock
*/
void lv_example_scale_6(void)
{
scale = lv_scale_create(lv_screen_active());
lv_obj_set_size(scale, 150, 150);
lv_scale_set_mode(scale, LV_SCALE_MODE_ROUND_INNER);
lv_obj_set_style_bg_opa(scale, LV_OPA_60, 0);
lv_obj_set_style_bg_color(scale, lv_color_black(), 0);
lv_obj_set_style_radius(scale, LV_RADIUS_CIRCLE, 0);
lv_obj_set_style_clip_corner(scale, true, 0);
lv_obj_center(scale);
lv_scale_set_label_show(scale, true);
lv_scale_set_total_tick_count(scale, 61);
lv_scale_set_major_tick_every(scale, 5);
static const char * hour_ticks[] = {"12", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", NULL};
lv_scale_set_text_src(scale, hour_ticks);
static lv_style_t indicator_style;
lv_style_init(&indicator_style);
/* Label style properties */
lv_style_set_text_font(&indicator_style, LV_FONT_DEFAULT);
lv_style_set_text_color(&indicator_style, lv_palette_main(LV_PALETTE_YELLOW));
/* Major tick properties */
lv_style_set_line_color(&indicator_style, lv_palette_main(LV_PALETTE_YELLOW));
lv_style_set_length(&indicator_style, 8); /* tick length */
lv_style_set_line_width(&indicator_style, 2); /* tick width */
lv_obj_add_style(scale, &indicator_style, LV_PART_INDICATOR);
/* Minor tick properties */
static lv_style_t minor_ticks_style;
lv_style_init(&minor_ticks_style);
lv_style_set_line_color(&minor_ticks_style, lv_palette_main(LV_PALETTE_YELLOW));
lv_style_set_length(&minor_ticks_style, 6); /* tick length */
lv_style_set_line_width(&minor_ticks_style, 2); /* tick width */
lv_obj_add_style(scale, &minor_ticks_style, LV_PART_ITEMS);
/* Main line properties */
static lv_style_t main_line_style;
lv_style_init(&main_line_style);
lv_style_set_arc_color(&main_line_style, lv_color_black());
lv_style_set_arc_width(&main_line_style, 5);
lv_obj_add_style(scale, &main_line_style, LV_PART_MAIN);
lv_scale_set_range(scale, 0, 60);
lv_scale_set_angle_range(scale, 360);
lv_scale_set_rotation(scale, 270);
minute_hand = lv_line_create(scale);
lv_line_set_points_mutable(minute_hand, minute_hand_points, 2);
lv_obj_set_style_line_width(minute_hand, 3, 0);
lv_obj_set_style_line_rounded(minute_hand, true, 0);
lv_obj_set_style_line_color(minute_hand, lv_color_white(), 0);
hour_hand = lv_line_create(scale);
lv_obj_set_style_line_width(hour_hand, 5, 0);
lv_obj_set_style_line_rounded(hour_hand, true, 0);
lv_obj_set_style_line_color(hour_hand, lv_palette_main(LV_PALETTE_RED), 0);
hour = 11;
minute = 5;
lv_timer_t * timer = lv_timer_create(timer_cb, 250, NULL);
lv_timer_ready(timer);
}
#endif

72
libraries/lvgl/examples/widgets/scale/lv_example_scale_7.c Normal file
View File

@@ -0,0 +1,72 @@
#include "../../lv_examples.h"
#if LV_USE_SCALE && LV_BUILD_EXAMPLES
#include "../../../src/lvgl_private.h" //To expose the fields of lv_draw_task_t
static void draw_event_cb(lv_event_t * e)
{
lv_obj_t * obj = lv_event_get_target(e);
lv_draw_task_t * draw_task = lv_event_get_draw_task(e);
lv_draw_dsc_base_t * base_dsc = lv_draw_task_get_draw_dsc(draw_task);
lv_draw_label_dsc_t * label_draw_dsc = lv_draw_task_get_label_dsc(draw_task);
if(base_dsc->part == LV_PART_INDICATOR) {
if(label_draw_dsc) {
const lv_color_t color_idx[7] = {
lv_palette_main(LV_PALETTE_RED),
lv_palette_main(LV_PALETTE_ORANGE),
lv_palette_main(LV_PALETTE_YELLOW),
lv_palette_main(LV_PALETTE_GREEN),
lv_palette_main(LV_PALETTE_CYAN),
lv_palette_main(LV_PALETTE_BLUE),
lv_palette_main(LV_PALETTE_PURPLE),
};
uint8_t major_tick = lv_scale_get_major_tick_every(obj);
label_draw_dsc->color = color_idx[base_dsc->id1 / major_tick];
/*Free the previously allocated text if needed*/
if(label_draw_dsc->text_local) lv_free((void *)label_draw_dsc->text);
/*Malloc the text and set text_local as 1 to make LVGL automatically free the text.
* (Local texts are malloc'd internally by LVGL. Mimic this behavior here too)*/
char tmp_buffer[20] = {0}; /* Big enough buffer */
lv_snprintf(tmp_buffer, sizeof(tmp_buffer), "%.1f", base_dsc->id2 * 1.0f);
label_draw_dsc->text = lv_strdup(tmp_buffer);
label_draw_dsc->text_local = 1;
lv_point_t size;
lv_text_get_size(&size, label_draw_dsc->text, label_draw_dsc->font, 0, 0, 1000, LV_TEXT_FLAG_NONE);
int32_t new_w = size.x;
int32_t old_w = lv_area_get_width(&draw_task->area);
/* Distribute the new size equally on both sides */
draw_task->area.x1 -= (new_w - old_w) / 2;
draw_task->area.x2 += ((new_w - old_w) + 1) / 2; /* +1 for rounding */
}
}
}
/**
* Customizing scale major tick label color with `LV_EVENT_DRAW_TASK_ADDED` event
*/
void lv_example_scale_7(void)
{
lv_obj_t * scale = lv_scale_create(lv_screen_active());
lv_obj_set_size(scale, lv_pct(80), 100);
lv_scale_set_mode(scale, LV_SCALE_MODE_HORIZONTAL_BOTTOM);
lv_obj_center(scale);
lv_scale_set_label_show(scale, true);
lv_scale_set_total_tick_count(scale, 31);
lv_scale_set_major_tick_every(scale, 5);
lv_obj_set_style_length(scale, 5, LV_PART_ITEMS);
lv_obj_set_style_length(scale, 10, LV_PART_INDICATOR);
lv_scale_set_range(scale, 10, 40);
lv_obj_add_event_cb(scale, draw_event_cb, LV_EVENT_DRAW_TASK_ADDED, NULL);
lv_obj_add_flag(scale, LV_OBJ_FLAG_SEND_DRAW_TASK_EVENTS);
}
#endif