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40
41 //! [0]
42 #ifndef CARD_H
43 #define CARD_H
44
45 #include <QtGui>
46 #include <QList>
47
48 class CardLayout : public QLayout
49 {
50 public:
CardLayout(QWidget * parent,int dist)51 CardLayout(QWidget *parent, int dist): QLayout(parent, 0, dist) {}
CardLayout(QLayout * parent,int dist)52 CardLayout(QLayout *parent, int dist): QLayout(parent, dist) {}
CardLayout(int dist)53 CardLayout(int dist): QLayout(dist) {}
54 ~CardLayout();
55
56 void addItem(QLayoutItem *item);
57 QSize sizeHint() const;
58 QSize minimumSize() const;
59 QLayoutItem *count() const;
60 QLayoutItem *itemAt(int) const;
61 QLayoutItem *takeAt(int);
62 void setGeometry(const QRect &rect);
63
64 private:
65 QList<QLayoutItem*> list;
66 };
67 #endif
68 //! [0]
69
70
71 //! [1]
72 //#include "card.h"
73 //! [1]
74
75 //! [2]
count() const76 QLayoutItem *CardLayout::count() const
77 {
78 // QList::size() returns the number of QLayoutItems in the list
79 return list.size();
80 }
81 //! [2]
82
83 //! [3]
itemAt(int idx) const84 QLayoutItem *CardLayout::itemAt(int idx) const
85 {
86 // QList::value() performs index checking, and returns 0 if we are
87 // outside the valid range
88 return list.value(idx);
89 }
90
takeAt(int idx)91 QLayoutItem *CardLayout::takeAt(int idx)
92 {
93 // QList::take does not do index checking
94 return idx >= 0 && idx < list.size() ? list.takeAt(idx) : 0;
95 }
96 //! [3]
97
98
99 //! [4]
addItem(QLayoutItem * item)100 void CardLayout::addItem(QLayoutItem *item)
101 {
102 list.append(item);
103 }
104 //! [4]
105
106
107 //! [5]
~CardLayout()108 CardLayout::~CardLayout()
109 {
110 QLayoutItem *item;
111 while ((item = takeAt(0)))
112 delete item;
113 }
114 //! [5]
115
116
117 //! [6]
setGeometry(const QRect & r)118 void CardLayout::setGeometry(const QRect &r)
119 {
120 QLayout::setGeometry(r);
121
122 if (list.size() == 0)
123 return;
124
125 int w = r.width() - (list.count() - 1) * spacing();
126 int h = r.height() - (list.count() - 1) * spacing();
127 int i = 0;
128 while (i < list.size()) {
129 QLayoutItem *o = list.at(i);
130 QRect geom(r.x() + i * spacing(), r.y() + i * spacing(), w, h);
131 o->setGeometry(geom);
132 ++i;
133 }
134 }
135 //! [6]
136
137
138 //! [7]
sizeHint() const139 QSize CardLayout::sizeHint() const
140 {
141 QSize s(0,0);
142 int n = list.count();
143 if (n > 0)
144 s = QSize(100,70); //start with a nice default size
145 int i = 0;
146 while (i < n) {
147 QLayoutItem *o = list.at(i);
148 s = s.expandedTo(o->sizeHint());
149 ++i;
150 }
151 return s + n*QSize(spacing(), spacing());
152 }
153
minimumSize() const154 QSize CardLayout::minimumSize() const
155 {
156 QSize s(0,0);
157 int n = list.count();
158 int i = 0;
159 while (i < n) {
160 QLayoutItem *o = list.at(i);
161 s = s.expandedTo(o->minimumSize());
162 ++i;
163 }
164 return s + n*QSize(spacing(), spacing());
165 }
166 //! [7]
167