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50 | |
51 | #ifndef IMAGEVIEWER_H |
52 | #define IMAGEVIEWER_H |
53 | |
54 | #include <QMainWindow> |
55 | #include <QImage> |
56 | #if defined(QT_PRINTSUPPORT_LIB) |
57 | # include <QtPrintSupport/qtprintsupportglobal.h> |
58 | |
59 | # if QT_CONFIG(printer) |
60 | # include <QPrinter> |
61 | # endif |
62 | #endif |
63 | |
64 | QT_BEGIN_NAMESPACE |
65 | class QAction; |
66 | class QLabel; |
67 | class ; |
68 | class QScrollArea; |
69 | class QScrollBar; |
70 | QT_END_NAMESPACE |
71 | |
72 | //! [0] |
73 | class ImageViewer : public QMainWindow |
74 | { |
75 | Q_OBJECT |
76 | |
77 | public: |
78 | ImageViewer(QWidget *parent = nullptr); |
79 | bool loadFile(const QString &); |
80 | |
81 | private slots: |
82 | void open(); |
83 | void saveAs(); |
84 | void print(); |
85 | void copy(); |
86 | void paste(); |
87 | void zoomIn(); |
88 | void zoomOut(); |
89 | void normalSize(); |
90 | void fitToWindow(); |
91 | void about(); |
92 | |
93 | private: |
94 | void createActions(); |
95 | void (); |
96 | void updateActions(); |
97 | bool saveFile(const QString &fileName); |
98 | void setImage(const QImage &newImage); |
99 | void scaleImage(double factor); |
100 | void adjustScrollBar(QScrollBar *scrollBar, double factor); |
101 | |
102 | QImage image; |
103 | QLabel *imageLabel; |
104 | QScrollArea *scrollArea; |
105 | double scaleFactor = 1; |
106 | |
107 | #if defined(QT_PRINTSUPPORT_LIB) && QT_CONFIG(printer) |
108 | QPrinter printer; |
109 | #endif |
110 | |
111 | QAction *saveAsAct; |
112 | QAction *printAct; |
113 | QAction *copyAct; |
114 | QAction *zoomInAct; |
115 | QAction *zoomOutAct; |
116 | QAction *normalSizeAct; |
117 | QAction *fitToWindowAct; |
118 | }; |
119 | //! [0] |
120 | |
121 | #endif |
122 | |