# lv_buttonmatrix_private.h (/api/widgets/buttonmatrix/lv_buttonmatrix_private_h)



<RelatedHeaders name="lv_buttonmatrix.h" isPrivate="true" />

<ApiSummary structs="1" />

Structs [#structs]

<ApiMember kind="struct" name="_lv_buttonmatrix_t">
  \_lv_buttonmatrix_t [#_lv_buttonmatrix_t]

  Data of button matrix

  | Member          | Type                                                                         | Description                                                                               |
  | --------------- | ---------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------- |
  | `obj`           | <ApiLink name="lv_obj_t" />                                                  |                                                                                           |
  | `map_p`         | `const char *const  *`                                                       | Pointer to the current map                                                                |
  | `button_areas`  | <ApiLink name="lv_area_t" display="lv_area_t *" />                           | Array of areas of buttons                                                                 |
  | `ctrl_bits`     | <ApiLink name="lv_buttonmatrix_ctrl_t" display="lv_buttonmatrix_ctrl_t *" /> | Array of control bytes                                                                    |
  | `btn_cnt`       | <ApiLink name="uint32_t" />                                                  | Number of button in 'map\_p'(Handled by the library)                                      |
  | `row_cnt`       | <ApiLink name="uint32_t" />                                                  | Number of rows in 'map\_p'(Handled by the library)                                        |
  | `btn_id_sel`    | <ApiLink name="uint32_t" />                                                  | Index of the active button (being pressed/released etc) or LV\_BUTTONMATRIX\_BUTTON\_NONE |
  | `one_check`     | <ApiLink name="uint32_t" />                                                  | 1: Single button toggled at once                                                          |
  | `auto_free_map` | <ApiLink name="uint32_t" />                                                  | 1: Automatically free the map when the widget is deleted                                  |
</ApiMember>

Dependencies [#dependencies]

<FileIncludes includes="[&#x22;lv_obj_private.h&#x22;, &#x22;lv_buttonmatrix.h&#x22;]" includedBy="[&#x22;lv_keyboard_private.h&#x22;]" transitiveIncludes="[&#x22;lv_anim.h&#x22;, &#x22;lv_area.h&#x22;, &#x22;lv_array.h&#x22;, &#x22;lv_assert.h&#x22;, &#x22;lv_bidi.h&#x22;, &#x22;lv_color.h&#x22;, &#x22;lv_color_op.h&#x22;, &#x22;lv_conf_internal.h&#x22;, &#x22;lv_conf_kconfig.h&#x22;, &#x22;lv_display.h&#x22;, &#x22;lv_draw.h&#x22;, &#x22;lv_draw_arc.h&#x22;, &#x22;lv_draw_blur.h&#x22;, &#x22;lv_draw_buf.h&#x22;, &#x22;lv_draw_image.h&#x22;, &#x22;lv_draw_label.h&#x22;, &#x22;lv_draw_line.h&#x22;, &#x22;lv_draw_rect.h&#x22;, &#x22;lv_draw_triangle.h&#x22;, &#x22;lv_event.h&#x22;, &#x22;lv_ext_data.h&#x22;, &#x22;lv_flex.h&#x22;, &#x22;lv_font.h&#x22;, &#x22;lv_fs.h&#x22;, &#x22;lv_grad.h&#x22;, &#x22;lv_grid.h&#x22;, &#x22;lv_group.h&#x22;, &#x22;lv_image_decoder.h&#x22;, &#x22;lv_image_dsc.h&#x22;, &#x22;lv_indev.h&#x22;, &#x22;lv_layout.h&#x22;, &#x22;lv_ll.h&#x22;, &#x22;lv_log.h&#x22;, &#x22;lv_math.h&#x22;, &#x22;lv_matrix.h&#x22;, &#x22;lv_mem.h&#x22;, &#x22;lv_obj.h&#x22;, &#x22;lv_obj_class.h&#x22;, &#x22;lv_obj_draw.h&#x22;, &#x22;lv_obj_event.h&#x22;, &#x22;lv_obj_pos.h&#x22;, &#x22;lv_obj_property.h&#x22;, &#x22;lv_obj_property_names.h&#x22;, &#x22;lv_obj_scroll.h&#x22;, &#x22;lv_obj_style.h&#x22;, &#x22;lv_obj_style_gen.h&#x22;, &#x22;lv_obj_tree.h&#x22;, &#x22;lv_palette.h&#x22;, &#x22;lv_profiler.h&#x22;, &#x22;lv_profiler_builtin.h&#x22;, &#x22;lv_sprintf.h&#x22;, &#x22;lv_string.h&#x22;, &#x22;lv_style.h&#x22;, &#x22;lv_style_gen.h&#x22;, &#x22;lv_style_properties.h&#x22;, &#x22;lv_symbol_def.h&#x22;, &#x22;lv_text.h&#x22;, &#x22;lv_tick.h&#x22;, &#x22;lv_timer.h&#x22;, &#x22;lv_types.h&#x22;]" />