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;;; (acdwm events) --- event handlers
(import (acdwm keys)
(acdwm xlib)
(acdwm util)
(srfi 1))
(export make-drag drag? drag-type drag-event drag-window drag-attrs)
(define-record drag type event window attrs)
(define drag (make-parameter #f))
(define drag-types '(move resize))
(define-public (initialize-drag type event)
(assert (memq type drag-types))
(let ((win (and (buttonpress? event)
(xevent-xbutton-subwindow event))))
(and win
(drag (make-drag type event win (get-window-attributes win))))))
(define-public (cancel-drag)
(free-xevent (drag-event (drag)))
(free-xwindowattributes (drag-attrs (drag)))
(drag #f))
(define-public (handle-events #!optional (dpy (get-display)))
(let loop ((this (get-next-event dpy)))
(dprint "handling a " (xevent-type-name (xevent-type this)))
(cond
((keypress? this)
(handle-keypress this dpy)
(loop (get-next-event dpy)))
((buttonpress? this)
(handle-buttonpress this)
(loop (get-next-event dpy)))
((buttonrelease? this)
(handle-buttonrelease this)
(loop (get-next-event dpy)))
((motionnotify? this)
(handle-motion this)
(loop (get-next-event dpy)))
;; Make sure this is at the end!
(else
(loop (get-next-event dpy))))))
;;; Handlers
(define-public (handle-keypress event
#!optional (dpy (get-display)))
(let ((binding (find-keybinding event)))
(dprint "handle-keypress: " binding)
(and binding ((keybind-proc binding) event dpy))))
(define-public (handle-buttonpress event
#!optional (dpy (get-display)))
(let ((binding (find-mousebinding event)))
(dprint "handle-buttonpress: " binding)
(and binding ((mousebind-proc binding) event dpy))))
(define-public (handle-buttonrelease event
#!optional (dpy (get-display)))
(dprint "handle-buttonrelease")
(cancel-drag))
(define-public (handle-motion event
#!optional (dpy (get-display)))
(dprint "handle-motion")
(when (drag)
(when (some? (drag-window (drag)))
(let ((xd (- (xevent-xbutton-x_root event)
(xevent-xbutton-x_root (drag-event (drag)))))
(yd (- (xevent-xbutton-y_root event)
(xevent-xbutton-y_root (drag-event (drag))))))
(let ((xnew (+ (xwindowattributes-x (drag-attrs (drag)))
(if (eq? (drag-type (drag)) 'move) xd 0)))
(ynew (+ (xwindowattributes-y (drag-attrs (drag)))
(if (eq? (drag-type (drag)) 'move) yd 0)))
(wnew (max 1 (+ (xwindowattributes-width (drag-attrs (drag)))
(if (eq? (drag-type (drag)) 'resize) xd 0))))
(hnew (max 1 (+ (xwindowattributes-height (drag-attrs (drag)))
(if (eq? (drag-type (drag)) 'resize) yd 0)))))
(dprint wnew "x" hnew "+" xnew "+" ynew)
(xmoveresizewindow dpy (drag-window (drag)) xnew ynew wnew hnew))))))
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