Event called after an user press a computer mouse down over one of the column header.

property OnHeaderMouseDown: TNxHeaderMouseDownEvent read FOnHeaderMouseDown write FOnHeaderMouseDown;

Button

TMouseButton

Mouse button being pressed.

Shift

TShiftState

State of the modifier keys, the mouse buttons, or the touch devices.

Col

Integer

Index of a column being pressed.

X

Integer

X coordinate of mouse cursor.

Y

Integer

Y coordinate of mouse cursor.