77 lines
2.8 KiB
C
77 lines
2.8 KiB
C
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#include "../../lv_examples.h"
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#if LV_USE_CHART && LV_BUILD_EXAMPLES
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static void draw_event_cb(lv_event_t * e)
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{
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lv_obj_draw_part_dsc_t * dsc = lv_event_get_draw_part_dsc(e);
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if(!lv_obj_draw_part_check_type(dsc, &lv_chart_class, LV_CHART_DRAW_PART_TICK_LABEL)) return;
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if(dsc->id == LV_CHART_AXIS_PRIMARY_X && dsc->text) {
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const char * month[] = {"Jan", "Febr", "March", "Apr", "May", "Jun", "July", "Aug", "Sept", "Oct", "Nov", "Dec"};
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lv_snprintf(dsc->text, dsc->text_length, "%s", month[dsc->value]);
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}
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}
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/**
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* Add ticks and labels to the axis and demonstrate scrolling
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*/
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void lv_example_chart_3(void)
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{
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/*Create a chart*/
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lv_obj_t * chart;
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chart = lv_chart_create(lv_scr_act());
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lv_obj_set_size(chart, 200, 150);
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lv_obj_center(chart);
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lv_chart_set_type(chart, LV_CHART_TYPE_BAR);
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lv_chart_set_range(chart, LV_CHART_AXIS_PRIMARY_Y, 0, 100);
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lv_chart_set_range(chart, LV_CHART_AXIS_SECONDARY_Y, 0, 400);
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lv_chart_set_point_count(chart, 12);
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lv_obj_add_event_cb(chart, draw_event_cb, LV_EVENT_DRAW_PART_BEGIN, NULL);
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/*Add ticks and label to every axis*/
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lv_chart_set_axis_tick(chart, LV_CHART_AXIS_PRIMARY_X, 10, 5, 12, 3, true, 40);
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lv_chart_set_axis_tick(chart, LV_CHART_AXIS_PRIMARY_Y, 10, 5, 6, 2, true, 50);
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lv_chart_set_axis_tick(chart, LV_CHART_AXIS_SECONDARY_Y, 10, 5, 3, 4, true, 50);
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/*Zoom in a little in X*/
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lv_chart_set_zoom_x(chart, 800);
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/*Add two data series*/
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lv_chart_series_t * ser1 = lv_chart_add_series(chart, lv_palette_lighten(LV_PALETTE_GREEN, 2), LV_CHART_AXIS_PRIMARY_Y);
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lv_chart_series_t * ser2 = lv_chart_add_series(chart, lv_palette_darken(LV_PALETTE_GREEN, 2),
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LV_CHART_AXIS_SECONDARY_Y);
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/*Set the next points on 'ser1'*/
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lv_chart_set_next_value(chart, ser1, 31);
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lv_chart_set_next_value(chart, ser1, 66);
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lv_chart_set_next_value(chart, ser1, 10);
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lv_chart_set_next_value(chart, ser1, 89);
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lv_chart_set_next_value(chart, ser1, 63);
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lv_chart_set_next_value(chart, ser1, 56);
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lv_chart_set_next_value(chart, ser1, 32);
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lv_chart_set_next_value(chart, ser1, 35);
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lv_chart_set_next_value(chart, ser1, 57);
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lv_chart_set_next_value(chart, ser1, 85);
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lv_chart_set_next_value(chart, ser1, 22);
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lv_chart_set_next_value(chart, ser1, 58);
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lv_coord_t * ser2_array = lv_chart_get_y_array(chart, ser2);
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/*Directly set points on 'ser2'*/
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ser2_array[0] = 92;
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ser2_array[1] = 71;
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ser2_array[2] = 61;
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ser2_array[3] = 15;
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ser2_array[4] = 21;
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ser2_array[5] = 35;
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ser2_array[6] = 35;
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ser2_array[7] = 58;
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ser2_array[8] = 31;
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ser2_array[9] = 53;
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ser2_array[10] = 33;
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ser2_array[11] = 73;
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lv_chart_refresh(chart); /*Required after direct set*/
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}
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#endif
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