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lvgl/docs/widgets/extra/spinbox.md
dyktronix 7066c8fbbb
feat(spinbox ) add function to set cursor to specific position (#2314) 
* Spinbox set cursor to specific position (funct.)

* changed exp10 to lv_pow(10

* Update lv_spinbox.c

resolved indentation

* Update spinbox.md

Added lv_spinbox_set_pos description

Co-authored-by: Sebastian Dyker <sebastian.dyker@walther-systemtechnik.com>
2021-06-17 13:43:19 +02:00

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.. include:: /header.rst 
:github_url: |github_link_base|/widgets/extra/spinbox.md

Spinbox (lv_spinbox)

Overview

The Spinbox contains a number as text which can be increased or decreased by Keys or API functions. Under the hood the Spinbox is a modified Text area.

Parts and Styles

The parts of the Spinbox are identical to the Text area.

Value, range and step

lv_spinbox_set_value(spinbox, 1234) sets a new value on the Spinbox.

lv_spinbox_increment(spinbox) and lv_spinbox_decrement(spinbox) increments/decrements the value of the Spinbox according to the currently selected digit.

lv_spinbox_set_range(spinbox, -1000, 2500) sets a range. If the value is changed by lv_spinbox_set_value, by Keys,lv_spinbox_increment/decrement this range will be respected.

lv_spinbox_set_step(spinbox, 100) sets which digits to change on increment/decrement. Only multiples of ten can be set, and not for example 3.

lv_spinbox_set_pos(spinbox, 1) sets the cursor to a specific digit to change on increment/decrement. For example position '0' sets the cursor to the least significant digit.

Format

lv_spinbox_set_digit_format(spinbox, digit_count, separator_position) sets the number format. digit_count is the number of digits excluding the decimal separator and the sign. separator_position is the number of digits before the decimal point. If 0, no decimal point is displayed.

Rollover

lv_spinbox_set_rollover(spinbox, true/false) enables/disabled rollover mode. If either the minimum or maximum value is reached with rollover enabled, the value will change to the other limit. If rollover is disabled the value will be remain at the minimum or maximum value.

Events

  • LV_EVENT_VALUE_CHANGED Sent when the value has changed.

Learn more about Events.

Keys

  • LV_KEY_LEFT/RIGHT With Keypad move the cursor left/right. With Encoder decrement/increment the selected digit.
  • LV_KEY_UP/DOWN With Keypad and Encoder increment/decrement the value.
  • LV_KEY_ENTER With Encoder got the net digit. Jump to the first after the last.

Example


.. include:: ../../../examples/widgets/spinbox/index.rst

API


.. doxygenfile:: lv_spinbox.h
  :project: lvgl

Example