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50 | |
51 | #include <QApplication> |
52 | #include <QEventTransition> |
53 | #include <QPushButton> |
54 | #include <QStateMachine> |
55 | #include <QVBoxLayout> |
56 | #include <QWidget> |
57 | |
58 | //! [0] |
59 | class Window : public QWidget |
60 | { |
61 | public: |
62 | Window(QWidget *parent = nullptr) |
63 | : QWidget(parent) |
64 | { |
65 | QPushButton *button = new QPushButton(this); |
66 | button->setSizePolicy(hor: QSizePolicy::Expanding, ver: QSizePolicy::Expanding); |
67 | |
68 | QVBoxLayout *layout = new QVBoxLayout; |
69 | layout->addWidget(button); |
70 | layout->setContentsMargins(left: 80, top: 80, right: 80, bottom: 80); |
71 | setLayout(layout); |
72 | //! [0] |
73 | |
74 | //! [1] |
75 | QStateMachine *machine = new QStateMachine(this); |
76 | |
77 | QState *s1 = new QState(); |
78 | s1->assignProperty(object: button, name: "text" , value: "Outside" ); |
79 | |
80 | QState *s2 = new QState(); |
81 | s2->assignProperty(object: button, name: "text" , value: "Inside" ); |
82 | //! [1] |
83 | |
84 | //! [2] |
85 | QEventTransition *enterTransition = new QEventTransition(button, QEvent::Enter); |
86 | enterTransition->setTargetState(s2); |
87 | s1->addTransition(transition: enterTransition); |
88 | //! [2] |
89 | |
90 | //! [3] |
91 | QEventTransition *leaveTransition = new QEventTransition(button, QEvent::Leave); |
92 | leaveTransition->setTargetState(s1); |
93 | s2->addTransition(transition: leaveTransition); |
94 | //! [3] |
95 | |
96 | //! [4] |
97 | QState *s3 = new QState(); |
98 | s3->assignProperty(object: button, name: "text" , value: "Pressing..." ); |
99 | |
100 | QEventTransition *pressTransition = new QEventTransition(button, QEvent::MouseButtonPress); |
101 | pressTransition->setTargetState(s3); |
102 | s2->addTransition(transition: pressTransition); |
103 | |
104 | QEventTransition *releaseTransition = new QEventTransition(button, QEvent::MouseButtonRelease); |
105 | releaseTransition->setTargetState(s2); |
106 | s3->addTransition(transition: releaseTransition); |
107 | //! [4] |
108 | |
109 | //! [5] |
110 | machine->addState(state: s1); |
111 | machine->addState(state: s2); |
112 | machine->addState(state: s3); |
113 | |
114 | machine->setInitialState(s1); |
115 | machine->start(); |
116 | } |
117 | }; |
118 | //! [5] |
119 | |
120 | //! [6] |
121 | int main(int argc, char **argv) |
122 | { |
123 | QApplication app(argc, argv); |
124 | Window window; |
125 | window.resize(w: 300, h: 300); |
126 | window.show(); |
127 | |
128 | return app.exec(); |
129 | } |
130 | //! [6] |
131 | |