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xpointer(x) Xlib Interface xpointer(x)

NAME

xpointer - query pointer position

DESCRIPTION

The xpointer class provides an object interface the the XQueryPointer() function of Xlib. Users can get the pointer's current position in the root window's coordinate space, or in the coordinate space of a particular window.

SUPERCLASS

object

INSTANCE VARIABLES

display is the display whose pointer is to be queries. The default is "xdisplay".

window is the name of an xwindow object that should be used as the basis for pointer queries.

MESSAGES

query! queries the pointer and updates the object's state. This involves an X server round-trip, so you probably don't want to send this message until you really want the pointer information.

win_x?, win_y? returns the pointer x,y position relative to the window instance variable.

root_x?, root_y? returns the pointer x,y position relative to the root window.

keys_buttons? returns the current state of the modifier keys and pointer buttons.

root_id? returns the window id of the root window containing the pointer.

child_id? If the pointer is in a child of the window instance variable, its id is available through this message.

EXAMPLE

See the manual page for the motif_drawing_area class for an example of the use of the xpointer class.