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42 lines
1.0 KiB
C
42 lines
1.0 KiB
C
#include "../../lv_examples.h"
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#if LV_USE_CANVAS && LV_BUILD_EXAMPLES
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#define CANVAS_WIDTH 50
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#define CANVAS_HEIGHT 50
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/**
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* Draw an arc to the canvas
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*/
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void lv_example_canvas_5(void)
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{
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/*Create a buffer for the canvas*/
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LV_DRAW_BUF_DEFINE_STATIC(draw_buf, CANVAS_WIDTH, CANVAS_HEIGHT, LV_COLOR_FORMAT_ARGB8888);
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LV_DRAW_BUF_INIT_STATIC(draw_buf);
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/*Create a canvas and initialize its palette*/
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lv_obj_t * canvas = lv_canvas_create(lv_screen_active());
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lv_canvas_set_draw_buf(canvas, &draw_buf);
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lv_canvas_fill_bg(canvas, lv_color_hex3(0xccc), LV_OPA_COVER);
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lv_obj_center(canvas);
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lv_layer_t layer;
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lv_canvas_init_layer(canvas, &layer);
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lv_draw_arc_dsc_t dsc;
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lv_draw_arc_dsc_init(&dsc);
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dsc.color = lv_palette_main(LV_PALETTE_RED);
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dsc.width = 5;
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dsc.center.x = 25;
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dsc.center.y = 25;
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dsc.width = 10;
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dsc.radius = 15;
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dsc.start_angle = 0;
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dsc.end_angle = 220;
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lv_draw_arc(&layer, &dsc);
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lv_canvas_finish_layer(canvas, &layer);
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}
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#endif
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