Create model dialog with translucent background

How-to
,
1

Description

When i create a object on lv_scr_act() set background color black and LV_OPA_50, it has feeling of scrolling from the top down

What MCU/Processor/Board and compiler are you using?

ESP32S3

What LVGL version are you using?

8.3.1

What do you want to achieve?

Just show the background immediately

Code to reproduce

	dialog_bg = lv_obj_create(lv_scr_act());
	lv_obj_set_scrollbar_mode(dialog_bg , LV_SCROLLBAR_MODE_OFF);
	lv_obj_set_size(dialog_bg , LV_HOR_RES, LV_VER_RES);
	lv_obj_align(dialog_bg , LV_ALIGN_CENTER, 0, 0);

	lv_obj_set_style_border_width(dialog_bg , 0, LV_PART_MAIN|LV_STATE_DEFAULT);
	lv_obj_set_style_radius(dialog_bg , 0, LV_PART_MAIN|LV_STATE_DEFAULT);
	lv_obj_set_style_bg_color(dialog_bg , lv_color_hex(0x000000), LV_PART_MAIN|LV_STATE_DEFAULT);
	lv_obj_set_style_bg_opa(dialog_bg , LV_OPA_50, LV_PART_MAIN|LV_STATE_DEFAULT);

Screenshot and/or video

1111

2

Hello,

This is a result of your flushing function on whatever device you are using. LVGL has the ability to draw to the screen in “bars”, that is what you are seeing here.

You will have to use larger framebuffers or find some other (faster) implementation for the flush function to fix this.