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50
51#ifndef MOVEMENTTRANSITION_H
52#define MOVEMENTTRANSITION_H
53
54#include <QtWidgets>
55
56#include "window.h"
57
58//![0]
59class MovementTransition : public QEventTransition
60{
61 Q_OBJECT
62
63public:
64 MovementTransition(Window *window) :
65 QEventTransition(window, QEvent::KeyPress) {
66 this->window = window;
67 }
68//![0]
69
70//![1]
71protected:
72 bool eventTest(QEvent *event) override {
73 if (event->type() == QEvent::StateMachineWrapped &&
74 static_cast<QStateMachine::WrappedEvent *>(event)->event()->type() == QEvent::KeyPress) {
75 QEvent *wrappedEvent = static_cast<QStateMachine::WrappedEvent *>(event)->event();
76
77 QKeyEvent *keyEvent = static_cast<QKeyEvent *>(wrappedEvent);
78 int key = keyEvent->key();
79
80 return key == Qt::Key_2 || key == Qt::Key_8 || key == Qt::Key_6 ||
81 key == Qt::Key_4 || key == Qt::Key_Down || key == Qt::Key_Up ||
82 key == Qt::Key_Right || key == Qt::Key_Left;
83 }
84 return false;
85 }
86//![1]
87
88//![2]
89 void onTransition(QEvent *event) override {
90 QKeyEvent *keyEvent = static_cast<QKeyEvent *>(
91 static_cast<QStateMachine::WrappedEvent *>(event)->event());
92
93 int key = keyEvent->key();
94 switch (key) {
95 case Qt::Key_Left:
96 case Qt::Key_4:
97 window->movePlayer(direction: Window::Left);
98 break;
99 case Qt::Key_Up:
100 case Qt::Key_8:
101 window->movePlayer(direction: Window::Up);
102 break;
103 case Qt::Key_Right:
104 case Qt::Key_6:
105 window->movePlayer(direction: Window::Right);
106 break;
107 case Qt::Key_Down:
108 case Qt::Key_2:
109 window->movePlayer(direction: Window::Down);
110 break;
111 default:
112 ;
113 }
114 }
115//![2]
116
117private:
118 Window *window;
119};
120
121#endif
122
123

source code of qtbase/examples/widgets/statemachine/rogue/movementtransition.h