155 lines
4.8 KiB
Plaintext
155 lines
4.8 KiB
Plaintext
;;;;
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;;;; G a u g e . s t k l o s -- Gauges class definition
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;;;;
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;;;; Copyright © 1996-1998 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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;;;; $Id: Gauge.stklos 1.1 Wed, 04 Feb 1998 11:34:59 +0100 eg $
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;;;;
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;;;; Author: Erick Gallesio [eg@unice.fr]
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;;;; Creation date: 17-Oct-1996 14:53
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;;;; Last file update: 4-Feb-1998 10:23
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;;;
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(require "Basics")
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(select-module STklos+Tk)
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;=============================================================================
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;
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; < G a u g e >
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;
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;=============================================================================
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;;
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;; Resources
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;;
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;; We don't use the <Canvas> class for implementing gauges to avoid
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;; to load <Canvas> (which is rather long to load if no <Canvas> are
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;; used elsewhere). BTW, only a little bit of canvas capabilities are
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;; used here
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(define-class <Gauge> (<Tk-simple-widget>)
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( priv-box ;; The Cid of the box used in the canvas to represent the gauge
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(foreground :accessor foreground
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:initform "#3a5fcd" ; RoyalBlue3
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:init-keyword :foreground
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:allocation :active
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:after-slot-set! (lambda(o v)
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(when (slot-bound? o 'priv-box)
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((Id o) 'itemconfigure (slot-ref o 'priv-box)
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:fill v :outline v))))
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(height :accessor height
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:init-keyword :height
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:init-form 20
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:allocation :tk-virtual)
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(value :accessor value
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:init-keyword :value
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:initform 0
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:allocation :active
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:after-slot-set! (lambda(o v) (configure-gauge o)))
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(width :accessor width
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:init-keyword :width
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:init-form 200
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:allocation :tk-virtual))
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:metaclass <Tk-active-metaclass>)
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(define-method tk-constructor ((self <Gauge>)) Tk:canvas)
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;;;;
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;;;; Initialize
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;;;;
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(define-method initialize ((self <Gauge>) initargs)
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(next-method)
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(let ((Id (slot-ref self 'Id))
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(fg (foreground self)))
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(slot-set! self 'highlight-thickness 0)
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(slot-set! self 'relief "raised")
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(slot-set! self 'priv-box
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(Id 'create 'rectangle 0 0 0 0 :outline fg :fill fg))
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(bind self "<Configure>" (lambda () (configure-gauge self)))))
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;;;;
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;;;; configure-gauge
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;;;;
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(define-method configure-gauge ((self <Gauge>))
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(when (slot-bound? self 'priv-box)
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(let ((width (winfo 'width self))
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(height (winfo 'height self)))
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((Id self) 'coords (slot-ref self 'priv-box)
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0 0
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(quotient (* width (value self)) 100) height))))
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;=============================================================================
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;
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; < V a l u e d - G a u g e >
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;
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;=============================================================================
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(define-class <Valued-Gauge> (<Gauge>)
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( priv-txt
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(text-font :accessor text-font
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:initform '(Helvetica -14 bold)
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:allocation :active
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:after-slot-set! (lambda(o v)
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(when (slot-bound? o 'priv-txt)
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((Id o) 'itemconfigure
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(slot-ref o 'priv-txt)
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:font v))))
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(text-foreground :accessor text-foreground
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:initform "black"
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:allocation :active
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:after-slot-set! (lambda(o v)
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(when (slot-bound? o 'priv-txt)
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((Id o) 'itemconfigure
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(slot-ref o 'priv-txt)
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:fill v))))))
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;;;;
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;;;; Initialize
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;;;;
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(define-method initialize ((self <Valued-Gauge>) initargs)
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(next-method)
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(let* ((Id (slot-ref self 'Id))
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(fg (slot-ref self 'text-foreground))
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(fn (slot-ref self 'text-font)))
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(slot-set! self 'priv-txt
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(Id 'create 'text 10 10
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:anchor "nw" :text "XX%" :fill fg :font fn))))
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(define-method configure-gauge ((self <Valued-Gauge>) . val)
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(next-method)
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(when (slot-bound? self 'priv-txt)
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(let* ((Id (Id self))
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(txt (slot-ref self 'priv-txt))
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(bbox (Id 'bbox txt))
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(wtxt (- (list-ref bbox 2) (list-ref bbox 0)))
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(htxt (- (list-ref bbox 3) (list-ref bbox 1))))
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(Id 'coords txt (/ (- (winfo 'width self) wtxt) 2)
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(/ (- (winfo 'height self) htxt) 2))
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(Id 'itemconfigure (slot-ref self 'priv-txt)
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:text (format #f "~A%" (value self))))))
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(provide "Gauge")
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#|
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Example:
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(define g1 (make <Gauge> :border-width 2 :relief "raised"))
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(define g2 (make <Valued-Gauge> :border-width 2 :relief "raised"))
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(pack g1 g2)
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(dotimes (i 101)
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(set! (value g1) i)
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(set! (value g2) (- 100 i))
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(update 'idle)
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(after 60))
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|#
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