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Description
hey, I run the chart demo Display 1000 data points with zooming and scrolling in my device and it works well. Then I think how about enlage the data points. So I want to display 30000 data points by modify the demo code lv_example_chart_5. Then I found that when I scroll the chart(not the slider below), it worked well. But when I scroll the slider, the chart is not shown successfully when the slider is in the 1/3 range. Is there something attributes wrong I setted ?
What MCU/Processor/Board and compiler are you using?
TI ARM335X
What LVGL version are you using?
8.0.1
What do you want to achieve?
What have you tried so far?
Code to reproduce
Add a code snippet which can run in the simulator. It should contain only the relevant code that compiles without errors when separated from your main code base.
The code block(s) should be formatted like:
#define POINTNUM 30000
/*chart_point is an array contains 30000 points*/
void lv_example_chart_5(void)
{
/*Create a chart*/
chart = lv_chart_create(lv_scr_act());
lv_obj_set_size(chart, 900, 150);
lv_obj_align(chart, LV_ALIGN_CENTER, 0, 0);
lv_chart_set_range(chart, LV_CHART_AXIS_PRIMARY_Y, -1000, 1000);
/*Do not display points on the data*/
lv_obj_set_style_size(chart, 0, LV_PART_INDICATOR);
lv_chart_series_t * ser = lv_chart_add_series(chart, lv_palette_main(LV_PALETTE_RED), LV_CHART_AXIS_PRIMARY_Y);
uint32_t pcnt = sizeof(chart_point) / sizeof(chart_point[0]);
lv_chart_set_point_count(chart, pcnt);
lv_chart_set_ext_y_array(chart, ser, (lv_coord_t *)chart_point);
lv_obj_t * slider;
slider = lv_slider_create(lv_scr_act());
lv_slider_set_range(slider, LV_IMG_ZOOM_NONE, POINTNUM);
lv_obj_add_event_cb(slider, slider_x_event_cb, LV_EVENT_VALUE_CHANGED, NULL);
lv_obj_set_size(slider, 900, 10);
lv_obj_align_to(slider, chart, LV_ALIGN_OUT_BOTTOM_MID, 0, 20);
}
Screenshot and/or video
If possible, add screenshots and/or videos about the current state.