# Base Widget (/examples/widgets/obj) The `lv_obj_t` base class that every other widget inherits from, usable directly as a container or styling surface. Base objects with and without shadow [#base-objects-with-and-without-shadow] Two base objects showing default styling next to a custom blue shadow. Two `lv_obj` base objects are placed on the active screen. The first, sized 100 by 50, uses the default theme. The second keeps the default size and picks up a shared `lv_style_t` with a blue 10 px shadow spread by 5 px. Both are offset from center so the shadow difference is visible side by side. Draggable base object [#draggable-base-object] Move a `Drag me` object under the pointer using `LV_EVENT_PRESSING` . A 150 by 100 base object carries a centered `Drag me` label. An `LV_EVENT_PRESSING` callback reads the active input device's motion vector with `lv_indev_get_vect`, adds it to the object's current aligned position, and calls `lv_obj_set_pos` so the object follows the pointer as long as it is held down. Animated matrix transform on a base object [#animated-matrix-transform-on-a-base-object] Continuously scale and rotate a centered object using `lv_obj_set_transform` . A centered base object is paired with a 20 ms `lv_timer` that builds an identity `lv_matrix_t`, scales its x axis, rotates it by 360 times the scale factor, and applies the result with `lv_obj_set_transform`. The scale factor grows from 0.1 to 2.0 in 0.01 steps; once it exceeds 2.0 the object is reset with `lv_obj_reset_transform` and the loop restarts.