/usr/include/GNUstep/Renaissance/GSAutoLayoutProportionalManager.h is in librenaissance0-dev 0.9.0-4+b4.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 | /* -*-objc-*-
GSAutoLayoutProportionalManager.h
Copyright (C) 2002 - 2008 Free Software Foundation, Inc.
Author: Nicola Pero <nicola.pero@meta-innovation.com>
Date: April 2002 - March 2008
This file is part of GNUstep Renaissance
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; see the file COPYING.LIB.
If not, write to the Free Software Foundation,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef _GNUstep_H_GSAutoLayoutProportionalManager
#define _GNUstep_H_GSAutoLayoutProportionalManager
#include "GSAutoLayoutManager.h"
/*
* GSAutoLayoutProportionalManager objects are layout managers which
* layout line parts and segments in proportion to a 'layout unit'.
* By default, every line part is 1 unit long. By changing the
* 'proportion' of the line part, you can make it longer, or shorter;
* eg, you can have a line part which is 2 unit long; then it will be
* long exactly the double of all other line parts.
*
* The layout unit must be big enough that all segments display their
* `minimum length' when placed in the line parts. All line parts
* (and, consequently, segments) are always expanded as required no
* matter what, since they need to keep their proportions with other
* line parts.
*
* When content is placed inside a segment, its alignment is used
* as usual to place the content inside the segment.
*
* All lines must contain the same number of layout units. If the
* segments in a line sum up to use less layout units than the
* segments in another line, those layout units are left blank (the
* idea being that you can then add an element at the end of one line,
* but not the other ones ... the other ones will still be bigger, but
* display blank there).
*/
@interface GSAutoLayoutProportionalManager : GSAutoLayoutManager
{
float _minimumLayoutUnit;
float _layoutUnit;
}
/*
* The minimum layout is determined by determining the minimum layout
* unit necessary to display all segments and line parts. For each
* segment, the minimum layout unit necessary to display that segment
* is obtained by dividing the minimum length of the segment for the
* number of layout units that it covers (obtained by summing the
* proportion of all line parts that it spans). For each line part,
* the minimum layout unit necessary to display that line part is
* obtained by dividing the minimum length of the line part for the
* number of layout units that it covers (which is the proportion of
* the segment). The maximum of all these numbers is the minimum
* layout unit needed to display everything comfortably. Once the
* minimum layout unit has been determined, the line parts are
* easily laid out one after the other one by so that they take up
* a size equal to their proportion times the layout unit. Finally,
* the segment minimum layout is done from the line part layout
* as usual.
*/
- (BOOL) internalUpdateMinimumLayout;
/*
* The layout is determined by computing the number of layout units in
* a line (got by dividing the _minimumLength by the
* _minimumLayoutUnit). The _length is divided by this number to get
* the _layoutUnit. Layout is computed basing on this _layoutUnit -
* all line parts have their layout computed by laying them out one
* after the other one, and sizing them to cover `proportion' grid
* units each. Finally, the layout is propagated to segments as
* usual.
*/
- (BOOL) internalUpdateLayout;
@end
#endif
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