212 lines
7.4 KiB
Plaintext
212 lines
7.4 KiB
Plaintext
;;;;
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;;;; M u l t i p a n e d . s t k
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;;;;
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;;;; Rewritten version of Paned.stk to allow an arbitrary number of panes.
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;;;; Modified by Harvey J. Stein <hjstein@math.huji.ac.il>
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;;;; Modified again by Erick Gallesio for allowing horizontal and vertical
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;;;; placement
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;;;;
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;;;; Copyright © 1993-1996 Erick Gallesio - I3S-CNRS/ESSI <eg@unice.fr>
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;;;;
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;;;; Permission to use, copy, and/or distribute this software and its
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;;;; documentation for any purpose and without fee is hereby granted, provided
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;;;; that both the above copyright notice and this permission notice appear in
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;;;; all copies and derived works. Fees for distribution or use of this
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;;;; software or derived works may only be charged with express written
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;;;; permission of the copyright holder.
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;;;; This software is provided ``as is'' without express or implied warranty.
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;;;;
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;;;; Idea of this implementation was found in comp.lang.tcl.
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;;;; Original author seems to be James Noble and the version from which this
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;;;; stuff is derivated is Jay Schmidgall (shmdgljd@ghostwind.rchland.ibm.com).
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(require "Frame")
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;
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;;;; <MultiPaned> class definition
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;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define-class <MultiPaned> (<Tk-composite-widget>)
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(;; Public slots
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(frames :accessor frames-of)
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(grips :accessor grips-of)
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(ghost :accessor ghost-of)
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(panes :accessor panes-of :init-keyword :panes)
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(width :accessor width :init-keyword :width
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:allocation :propagated :propagate-to (frame))
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(height :accessor height :init-keyword :height
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:allocation :propagated :propagate-to (frame))
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;; Virtual slot
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(orientation :accessor orientation :allocation :virtual
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:slot-ref (lambda (o)
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(extend-environment (environment o)
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(if vertical? "vertical" "horizontal")))
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:slot-set! (lambda (o v)
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(extend-environment (environment o)
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(set! vertical? (equal? v "vertical"))
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(place-grips o))))
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;; Private slots
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(environment :accessor environment)
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(fractions :accessor fractions-of)
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(grip-number :accessor grip-number-of)
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(drag-start :accessor drag-start-of)))
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(define-method initialize-composite-widget ((self <MultiPaned>) initargs frame)
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(let* ((panes (get-keyword :panes initargs 2))
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(vertical? (equal? "vertical"
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(get-keyword :orientation initargs "vertical")))
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(fractions (make-vector panes))
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(frames (make-vector panes))
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(grips (make-vector (- panes 1)))
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(ghost (make <Frame> :parent frame :border-width 2 :relief "ridge")))
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;; Build the "container" frames
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(dotimes (i panes)
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(vector-set! fractions i (/ (+ i 1) panes))
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(vector-set! frames i (make <Frame> :parent frame :border-width 2
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:relief "raised")))
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;; Build grips
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(dotimes (i (- panes 1))
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(let ((G (make <Frame> :parent frame :width 10 :height 10 :border-width 2
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:relief "raised" :cursor "crosshair")))
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(vector-set! grips i G)
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;; Associate bindings to the newly created grip
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(bind G "<Button-1>" (lambda (|W| x y) (start-grip self x y |W|)))
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(bind G "<B1-Motion>" (lambda (x y) (motion-grip self x y)))
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(bind G "<ButtonRelease-1>" (lambda (x y) (stop-grip self x y)))))
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;; Initialize slots
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(slot-set! self 'environment (the-environment))
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(slot-set! self 'panes panes)
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(slot-set! self 'frames frames)
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(slot-set! self 'grips grips)
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(slot-set! self 'fractions fractions)
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(slot-set! self 'ghost ghost)
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(slot-set! self 'Id (Id frame))
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;; Place grips
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(place-grips self)))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;
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;;; <MultiPaned> methods
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;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define-method place-grips ((self <MultiPaned>))
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(extend-environment (environment self)
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(let ((f 0)
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(fp 0))
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;; Place frames and grips
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(dotimes (i (- panes 1))
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(set! f (vector-ref fractions i))
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(if vertical?
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(begin
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(place (vector-ref grips i) :rely 0.95 :relx f :anchor "center")
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(place (vector-ref frames i) :y 0 :relh 1 :relx fp :relw (- f fp)))
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(begin
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(place (vector-ref grips i) :relx 0.95 :rely f :anchor "center")
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(place (vector-ref frames i) :x 0 :relw 1 :rely fp :relh (- f fp))))
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(raise (vector-ref grips i))
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(set! fp f))
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;; Last frame
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(if vertical?
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(place (vector-ref frames (- panes 1))
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:y 0 :relx f :relheight 1 :relwidth (- 1.0 f))
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(place (vector-ref frames (- panes 1))
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:x 0 :rely f :relwidth 1 :relheight (- 1.0 f))))))
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;;;
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;;; Methods for moving grips
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;;;
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(define-method find-grip ((self <MultiPaned>) w)
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(do ((i 0 (+ 1 i)))
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((eq? w (slot-ref (vector-ref (grips-of self) i) 'id)) i)))
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(define-method start-grip ((self <MultiPaned>) x y w)
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(extend-environment (environment self)
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(let* ((grip (find-grip self w))
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(ghost (ghost-of self))
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(fracts (fractions-of self))
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(fr (vector-ref fracts grip)))
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(slot-set! self 'grip-number grip)
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(slot-set! self 'drag-start (cons x y))
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;; Raise ghost
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(place 'forget ghost) ; otherwise old constaints seems to stay valid
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(if vertical?
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(place ghost :rely 0 :relx fr :anchor "n" :relh 1)
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(place ghost :relx 0 :rely fr :anchor "w" :relw 1))
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(raise ghost)
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;; Raise current grip
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(raise (vector-ref (grips-of self) grip)))))
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(define-method motion-grip ((self <MultiPaned>) x y)
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(extend-environment (environment self)
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(let ((fraction (fractions-of self))
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(gn (grip-number-of self))
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(ghost (ghost-of self)))
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(if vertical?
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(begin
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(vector-set! fraction
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gn
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(max 0.0001
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(min .9999
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(+ (vector-ref fraction gn)
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(/ (- x (car (drag-start-of self)))
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(+ 1 (winfo 'width (frame-of self))))))))
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(place ghost
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:rely 0 :relheight 1 :relx (vector-ref fraction gn) :anchor "n")
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(place (vector-ref (grips-of self) gn)
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:rely 0.95 :relx (vector-ref fraction gn) :anchor "center"))
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(begin
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(vector-set! fraction
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gn
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(max 0.0001
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(min .9999
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(+ (vector-ref fraction gn)
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(/ (- y (cdr (drag-start-of self)))
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(+ 1 (winfo 'height (frame-of self))))))))
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(place ghost
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:relx 0 :relwidth 1 :rely (vector-ref fraction gn) :anchor "w")
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(place (vector-ref (grips-of self) gn)
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:relx 0.95 :rely (vector-ref fraction gn) :anchor "center"))))))
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(define-method stop-grip ((self <MultiPaned>) x y)
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(let* ((gn (grip-number-of self))
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(fractions (fractions-of self))
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(cp (vector-ref fractions gn)))
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(dotimes (i (- (panes-of self) 1))
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(cond
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((and (< i gn) (> (vector-ref fractions i) cp))
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(vector-set! fractions i cp))
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((and (> i gn) (< (vector-ref fractions i) cp))
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(vector-set! fractions i cp)))))
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(lower (ghost-of self))
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(place-grips self))
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(provide "Multipaned")
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;;;
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;;; Example of usage
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;;;
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;;; (define p (make <MultiPaned>
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;;; :panes 4
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;;; :width 400 :height 400
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;;; :orientation "horizontal"))
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;;;
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;;; (define l0 (make <Label> :text "Lab0" :parent (vector-ref (frames-of p) 0)))
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;;; (define l1 (make <Label> :text "Lab1" :parent (vector-ref (frames-of p) 1)))
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;;; (define l2 (make <Label> :text "Lab2" :parent (vector-ref (frames-of p) 2)))
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;;; (pack l0 l1 l2 :expand #t :fill "both")
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;;; (pack p :expand #t)
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;;;
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