blob: af1c729f55dfafbf0101c99cadef8adcccae3bfd (
plain)
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
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
/****************************************************************************
**
** Implementing your own layout: flow example
**
** Copyright (C) 1996-2008 Trolltech ASA. All rights reserved.
**
** This file is part of an example program for Qt. This example
** program may be used, distributed and modified without limitation.
**
*****************************************************************************/
#include "flow.h"
class SimpleFlowIterator :public QGLayoutIterator
{
public:
SimpleFlowIterator( QPtrList<QLayoutItem> *l ) :idx(0), list(l) {}
uint count() const;
QLayoutItem *current();
QLayoutItem *next();
QLayoutItem *takeCurrent();
private:
int idx;
QPtrList<QLayoutItem> *list;
};
uint SimpleFlowIterator::count() const
{
return list->count();
}
QLayoutItem *SimpleFlowIterator::current()
{
return idx < int(count()) ? list->at(idx) : 0;
}
QLayoutItem *SimpleFlowIterator::next()
{
idx++; return current();
}
QLayoutItem *SimpleFlowIterator::takeCurrent()
{
return idx < int(count()) ? list->take( idx ) : 0;
}
SimpleFlow::~SimpleFlow()
{
deleteAllItems();
}
int SimpleFlow::heightForWidth( int w ) const
{
if ( cached_width != w ) {
//Not all C++ compilers support "mutable" yet:
SimpleFlow * mthis = (SimpleFlow*)this;
int h = mthis->doLayout( QRect(0,0,w,0), TRUE );
mthis->cached_hfw = h;
mthis->cached_width = w;
return h;
}
return cached_hfw;
}
void SimpleFlow::addItem( QLayoutItem *item)
{
list.append( item );
}
bool SimpleFlow::hasHeightForWidth() const
{
return TRUE;
}
QSize SimpleFlow::sizeHint() const
{
return minimumSize();
}
QSizePolicy::ExpandData SimpleFlow::expanding() const
{
return QSizePolicy::NoDirection;
}
QLayoutIterator SimpleFlow::iterator()
{
return QLayoutIterator( new SimpleFlowIterator( &list ) );
}
void SimpleFlow::setGeometry( const QRect &r )
{
QLayout::setGeometry( r );
doLayout( r );
}
int SimpleFlow::doLayout( const QRect &r, bool testonly )
{
int x = r.x();
int y = r.y();
int h = 0; //height of this line so far.
QPtrListIterator<QLayoutItem> it(list);
QLayoutItem *o;
while ( (o=it.current()) != 0 ) {
++it;
int nextX = x + o->sizeHint().width() + spacing();
if ( nextX - spacing() > r.right() && h > 0 ) {
x = r.x();
y = y + h + spacing();
nextX = x + o->sizeHint().width() + spacing();
h = 0;
}
if ( !testonly )
o->setGeometry( QRect( QPoint( x, y ), o->sizeHint() ) );
x = nextX;
h = QMAX( h, o->sizeHint().height() );
}
return y + h - r.y();
}
QSize SimpleFlow::minimumSize() const
{
QSize s(0,0);
QPtrListIterator<QLayoutItem> it(list);
QLayoutItem *o;
while ( (o=it.current()) != 0 ) {
++it;
s = s.expandedTo( o->minimumSize() );
}
return s;
}
|
