/* Part of XPCE --- The SWI-Prolog GUI toolkit Author: Jan Wielemaker and Anjo Anjewierden E-mail: jan@swi.psy.uva.nl WWW: http://www.swi.psy.uva.nl/projects/xpce/ Copyright (c) 1999-2011, University of Amsterdam All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ :- module(pce_subframe, []). :- use_module(library(pce)). :- require([ default/3 , send_list/3 ]). /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - This file defines the XPCE class subframe. Class subframe is a subclass of class window that manages a set of sub-windows and allows for `frames-on-windows'. The behaviour of class subframe is based on the TWM window manager. The normal way to use this class is 1) Relate a set of windows (using ->above, etc.) 2) Create an instance of subframe. 3) append one of the windows using ->append 4) open the frame using ->open. The argument is a window on which the frame is to be opened. See also the predicate test/0 at the end of this file. Other important public methods are ->button define a title-bar button for this frame - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */ :- pce_autoload(twm_resize_button, library(twm_resize_button)). :- pce_begin_class(subframe, window). variable(left_buttons, chain, get, "Buttons to the left"). variable(right_buttons, chain, get, "Buttons to the right"). variable(label_text, text, get, "Text for the label"). variable(members, chain, get, "Chain with member windows"). variable(title_line, line, get, "Line below titlebar"). variable(title_box, box, get, "Box in titlebar"). variable(closed, bool, get, "Iconic/open representation"). variable(saved_area, area, get, "Area of other representation"). variable(saved_pen, int, get, "Pen value of other representation"). variable(icon, bitmap, get, "Bitmap representing the icon"). variable(icon_label_text,text, get, "Text for iconic representation"). resource(label_font, font, '@helvetica_bold_14'). resource(pen, int, '3'). resource(cursor, cursor, 'hand2'). resource(icon, bitmap, 'pce.bm'). initialise(F, Label:char_array) :-> "Create from Label":: send(F, slot, icon, @default), send(F, send_super, initialise), get(F, resource_value, label_font, Font), default(Label, '', Lbl), send(F, slot, title_box, new(TB, box)), send(TB, pen, 0), send(TB, fill_pattern, @grey50_image), send(F, slot, title_line, new(TL, line)), send(TL, pen, F?pen), send(TL, points, 0, -F?pen/2, 0, -F?pen/2), send(F, slot, label_text, text(Lbl, left, Font)), send(F, slot, left_buttons, new(chain)), send(F, slot, right_buttons, new(chain)), send(F, slot, members, new(chain)), send(F, slot, saved_area, area(20,20,64,64)), send(F, slot, saved_pen, 0), send(F, slot, closed, @off), send(F, slot, icon_label_text, text(Lbl, left, Font)). append(F, W:window) :-> "Append a new window":: send(W?tile?root, for_all, message(F?members, add, @arg1)). title_bar_height(F, Margin, Height) :- Margin = 2, new(H, number(0)), send(F?left_buttons, for_all, message(H, maximum, @arg1?height)), send(F?right_buttons, for_all, message(H, maximum, @arg1?height)), send(H, maximum, F?label_text?height), send(H, plus, 2*Margin + F?title_line?pen), get(H, value, Height). geometry(F, FX:[int], FY:[int], FW:[int], FH:[int]) :-> "Update position and layout of the title-bar":: send(F, send_super, geometry, FX, FY, FW, FH), ( get(F, closed, @off) -> title_bar_height(F, Margin, H), send(F, scroll_to, point(0, -H)), new(X, number(Margin)), get(H, value, PLH), Y is -PLH + Margin, send(F?left_buttons, for_all, and(message(@arg1, set, X, Y), message(F, display, @arg1), message(X, plus, Margin + @arg1?width))), send(F?label_text, set, X, Y), send(F, display, F?label_text), send(X, value, F?width - Margin - 2*F?pen), send(F?right_buttons, for_all, and(message(X, minus, @arg1?width), message(@arg1, set, X, Y), message(F, display, @arg1), message(X, minus, Margin))), send(F, display, F?title_line), send(F, display, F?title_box), send(F?title_line, end_x, F?width), send(F?title_box, set, F?label_text?right_side + Margin, -(H - Margin), X - F?label_text?right_side - Margin, H - 2*Margin - F?pen), send(F?tile, set, 0, 0, F?width-2*F?pen, F?height - H - 2*F?pen), send(F?members, for_all, message(F, display, @arg1)) ; send(F, scroll_to, point(0, 0)), send(F, display, F?icon), send(F, display, F?icon_label_text), send(F?icon_label_text, center_x, F?icon?center_x), send(F?icon_label_text, y, F?icon?bottom_side) ). request_geometry(F, X:[int], Y:[int], W:[int], H:[int]) :-> "Add height for the title-bar":: ( get(F, closed, @off) -> ( H \== @default -> title_bar_height(F, _Margin, TH), FH is TH + H ; FH = H ), FW = W ; FH = F?icon?height + F?icon_label_text?height + 2 * F?pen, new(FW, number(F?icon?width)), send(FW, maximum, F?icon_label_text?width), send(FW, plus, 2 * F?pen) ), send(F, geometry, X, Y, FW, FH). tile(F, Tile:tile) :<- "Get root-tile of the window tree":: get(F?members?head, tile, SubTile), get(SubTile, root, Tile). fit(F) :-> "Fix layout":: get(F, tile, RootTile), send(RootTile, enforce), send(F, set, @default, @default, RootTile?ideal_width, RootTile?ideal_height). open(F, W:device, Pos:[point]) :-> "Open the sub-frame on indicated device":: send(F, fit), send(W, display, F, Pos). /******************************* * BUTTONS * *******************************/ button(F, Op:'name|code', Image:[image], Place:[{left,right}]) :-> "Attach a button to the titlebar":: default(Image, ?(Op, append, '.bm'), Img), new(Image16, image(@nil, 18, 18)), new(Bm, bitmap(Img)), send(Bm, center, point(9,9)), send(Image16, draw_in, Bm), send(Bm, done), send(Image16, draw_in, box(18,18)), ( Op == resize -> new(Button, twm_resize_button(Image16)) ; new(Button, bitmap(Image16)), ( atom(Op) -> Action = message(F, Op) ; Action = Op ), send(Button, recogniser, click_gesture(left, '', single, Action)) ), ( Place == right -> send(F?right_buttons, append, Button) ; send(F?left_buttons, append, Button) ), ( get(F, device, Dev), Dev \== @nil -> send(F, geometry) % update ; true ). /******************************* * EVENTS * *******************************/ :- pce_global(@open_subframe_recogniser, new(handler_group(click_gesture(left, '', single, message(@receiver, expose)), new(move_outline_gesture(left))))). :- pce_global(@closed_subframe_recogniser, new(handler_group(click_gesture(left, '', double, message(@receiver, closed, @off)), new(move_outline_gesture(left))))). event(F, Ev:event) :-> ( send(F, send_super, event) -> true ; ( get(F, closed, @off) -> send(@open_subframe_recogniser, event, Ev) ; send(@closed_subframe_recogniser, event, Ev) ) ). /******************************* * ICONIC REPRESENTATION * *******************************/ closed(F, Val:bool) :-> "Change closed status":: ( get(F, closed, Val) -> true ; new(OtherArea, area), send(OtherArea, copy, F?saved_area), send(F?saved_area, copy, F?area), send(F?graphicals, for_all, message(@arg1, displayed, @off)), send(F, slot, closed, Val), get(F, saved_pen, OtherPen), send(F, slot, saved_pen, F?pen), send(F, pen, OtherPen), send(F, area, OtherArea), send(F, expose) ). iconify(F) :-> "->closed: @on (button call-back)":: send(F, closed, @on). :- pce_end_class. /******************************* * TEST * *******************************/ test :- send(new(@p, picture('Desktop', size(600, 500))), open), new(@p2, picture), send(new(@b, browser), right, @p2), send_list(@b, append, [aap, noot, mies]), new(@f, subframe('Hello')), send(@f, button, iconify, 'iconify.bm', left), send(@f, button, destroy, 'delete.bm', left), send(@f, button, resize, 'resize.bm', right), send(@f, append, @p2), send(@f, open, @p, point(50,50)), send(@p2, display, new(B, bitmap('pce.bm'))), send(B, recogniser, new(move_gesture)), new(@f2, subframe('I am small')), send(@f2, append, new(@p3, picture)), send(@f2, button, iconify, 'iconify.bm', left), send(@f2, button, destroy, 'delete.bm', left), send(@f2, button, resize, 'resize.bm', right), send(@f2, open, @p, point(200, 200)).