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
|
// Copyright (C) 2013 Thorbjørn Martsum - tmartsum[at]gmail.com
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#include <QGridLayout>
#include <QFormLayout>
#include <QStackedLayout>
#include <QPushButton>
#include <QLabel>
#include <QApplication>
class ReplaceButton : public QPushButton
{
Q_OBJECT
public:
ReplaceButton(const QString &text = QString("click to replace")) : QPushButton(text)
{
static int v = 0;
++v;
QString txt = QString("click to replace %1").arg(v);
setText(txt);
connect(this, SIGNAL(clicked()), this, SLOT(replace()));
}
protected slots:
void replace()
{
if (!parentWidget())
return;
static int n = 0;
++n;
if (parentWidget()->layout()->replaceWidget(this, new QLabel(QString("replaced(%1)").arg(n))))
deleteLater();
}
};
class StackButtonChange : public QPushButton
{
Q_OBJECT
public:
StackButtonChange(QStackedLayout *l) : QPushButton("stack wdg change")
{
sl = l;
connect(this, SIGNAL(clicked()), this, SLOT(changeWdg()));
}
protected slots:
void changeWdg()
{
int index = sl->indexOf(sl->currentWidget());
++index;
if (index >= sl->count())
index = 0;
sl->setCurrentWidget(sl->itemAt(index)->widget());
sl->parentWidget()->update();
}
protected:
QStackedLayout *sl;
};
int main(int argc, char **argv) {
QApplication app(argc, argv);
QWidget wdg1;
QGridLayout *l1 = new QGridLayout();
l1->addWidget(new ReplaceButton(), 1, 1, 2, 2, Qt::AlignCenter);
l1->addWidget(new ReplaceButton(), 3, 1, 1, 1, Qt::AlignRight);
l1->addWidget(new ReplaceButton(), 1, 3, 1, 1, Qt::AlignLeft);
l1->addWidget(new ReplaceButton(), 2, 3, 1, 1, Qt::AlignLeft);
l1->addWidget(new ReplaceButton(), 3, 2, 1, 1, Qt::AlignRight);
wdg1.setLayout(l1);
wdg1.setWindowTitle("QGridLayout");
wdg1.setGeometry(100, 100, 100, 100);
wdg1.show();
QWidget wdg2;
QFormLayout *l2 = new QFormLayout();
l2->addRow(QString("Label1"), new ReplaceButton());
l2->addRow(QString("Label2"), new ReplaceButton());
l2->addRow(new ReplaceButton(), new ReplaceButton());
wdg2.setLayout(l2);
wdg2.setWindowTitle("QFormLayout");
wdg2.setGeometry(100 + wdg1.sizeHint().width() + 5, 100, 100, 100);
wdg2.show();
QWidget wdg3;
QBoxLayout *l3 = new QVBoxLayout(); // new QHBoxLayout()
QStackedLayout *sl = new QStackedLayout();
sl->addWidget(new ReplaceButton());
sl->addWidget(new ReplaceButton());
sl->addWidget(new ReplaceButton());
l3->addLayout(sl);
l3->addWidget(new StackButtonChange(sl));
l3->addWidget(new ReplaceButton());
l3->addWidget(new ReplaceButton());
wdg3.setLayout(l3);
wdg3.setWindowTitle("QStackedLayout + BoxLayout");
wdg3.setGeometry(100, 100 + wdg1.sizeHint().height() + 30, 100 , 100);
wdg3.show();
app.exec();
}
#include "main.moc"
|
