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;;; -*- Mode: Lisp; Package: CLIM-DEMO -*-
;;; (c) copyright 2004 by
;;; Tim Moore (moore@bricoworks.com)
;;; This library is free software; you can redistribute it and/or
;;; modify it under the terms of the GNU Library General Public
;;; License as published by the Free Software Foundation; either
;;; version 2 of the License, or (at your option) any later version.
;;;
;;; This library is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;; Library General Public License for more details.
;;;
;;; You should have received a copy of the GNU Library General Public
;;; License along with this library; if not, write to the
;;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;;; Boston, MA 02111-1307 USA.
(in-package :clim-demo)
(define-application-frame dragndrop ()
()
(:pointer-documentation t)
(:panes
(interactor :interactor)
(scratchpad :application :display-time nil :height 600 :scroll-bars nil))
(:layouts
(default
(vertically ()
(scrolling (:height 300)
scratchpad)
interactor))))
(defclass shape ()
((x :accessor x :initarg :x)
(y :accessor y :initarg :y)))
(defclass circle (shape)
((radius :accessor radius :initarg :radius))
(:default-initargs :radius 50))
(define-dragndrop-command (com-add-circle)
((x 'real :prompt "x")
(y 'real :prompt "y")
(radius 'real :prompt "radius"))
(with-output-as-presentation
(t (make-instance 'circle :x x :y y :radius radius) 'circle)
(draw-circle* *standard-output* x y radius )))
(define-dragndrop-command (com-quit-dragndrop :name "Quit")
()
(frame-exit *application-frame*))
(define-presentation-to-command-translator translator-draw-circle
(blank-area com-add-circle dragndrop
:documentation "Add a circle")
(object x y)
`(,x ,y 50))
(define-dragndrop-command (com-clone-circle)
((original 'circle)
(start-x 'real)
(start-y 'real))
;; Track the pointer offset from the center of the original object
(let ((x-offset (- (x original) start-x))
(y-offset (- (y original) start-y)))
(multiple-value-bind (final-x final-y)
(dragging-output (t :finish-on-release t)
(draw-circle* *standard-output* (x original) (y original)
(radius original)
:filled nil ))
(com-add-circle (+ final-x x-offset)
(+ final-y y-offset)
(radius original)))))
(define-presentation-to-command-translator translator-clone-circle
(circle com-clone-circle dragndrop)
(object x y)
`(,object ,x ,y))
(defun drag-circles ()
(run-frame-top-level (make-application-frame 'dragndrop)))
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