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39
40#ifndef QLABEL_H
41#define QLABEL_H
42
43#include <QtWidgets/qtwidgetsglobal.h>
44#include <QtWidgets/qframe.h>
45
46QT_REQUIRE_CONFIG(label);
47
48QT_BEGIN_NAMESPACE
49
50
51class QLabelPrivate;
52
53class Q_WIDGETS_EXPORT QLabel : public QFrame
54{
55 Q_OBJECT
56 Q_PROPERTY(QString text READ text WRITE setText)
57 Q_PROPERTY(Qt::TextFormat textFormat READ textFormat WRITE setTextFormat)
58 Q_PROPERTY(QPixmap pixmap READ pixmap WRITE setPixmap)
59 Q_PROPERTY(bool scaledContents READ hasScaledContents WRITE setScaledContents)
60 Q_PROPERTY(Qt::Alignment alignment READ alignment WRITE setAlignment)
61 Q_PROPERTY(bool wordWrap READ wordWrap WRITE setWordWrap)
62 Q_PROPERTY(int margin READ margin WRITE setMargin)
63 Q_PROPERTY(int indent READ indent WRITE setIndent)
64 Q_PROPERTY(bool openExternalLinks READ openExternalLinks WRITE setOpenExternalLinks)
65 Q_PROPERTY(Qt::TextInteractionFlags textInteractionFlags READ textInteractionFlags WRITE setTextInteractionFlags)
66 Q_PROPERTY(bool hasSelectedText READ hasSelectedText)
67 Q_PROPERTY(QString selectedText READ selectedText)
68
69public:
70 explicit QLabel(QWidget *parent=nullptr, Qt::WindowFlags f=Qt::WindowFlags());
71 explicit QLabel(const QString &text, QWidget *parent=nullptr, Qt::WindowFlags f=Qt::WindowFlags());
72 ~QLabel();
73
74 QString text() const;
75
76#if QT_DEPRECATED_SINCE(5,15)
77 QT_DEPRECATED_VERSION_X(5, 15, "Use the other overload which returns QPixmap by-value")
78 const QPixmap *pixmap() const; // ### Qt 7: Remove function
79
80 QPixmap pixmap(Qt::ReturnByValueConstant) const;
81#else
82 QPixmap pixmap(Qt::ReturnByValueConstant = Qt::ReturnByValue) const; // ### Qt 7: Remove arg
83#endif // QT_DEPRECATED_SINCE(5,15)
84
85#ifndef QT_NO_PICTURE
86# if QT_DEPRECATED_SINCE(5,15)
87 QT_DEPRECATED_VERSION_X(5, 15, "Use the other overload which returns QPicture by-value")
88 const QPicture *picture() const; // ### Qt 7: Remove function
89
90 QPicture picture(Qt::ReturnByValueConstant) const;
91# else
92 QPicture picture(Qt::ReturnByValueConstant = Qt::ReturnByValue) const; // ### Qt 7: Remove arg
93# endif // QT_DEPRECATED_SINCE(5,15)
94#endif
95#if QT_CONFIG(movie)
96 QMovie *movie() const;
97#endif
98
99 Qt::TextFormat textFormat() const;
100 void setTextFormat(Qt::TextFormat);
101
102 Qt::Alignment alignment() const;
103 void setAlignment(Qt::Alignment);
104
105 void setWordWrap(bool on);
106 bool wordWrap() const;
107
108 int indent() const;
109 void setIndent(int);
110
111 int margin() const;
112 void setMargin(int);
113
114 bool hasScaledContents() const;
115 void setScaledContents(bool);
116 QSize sizeHint() const override;
117 QSize minimumSizeHint() const override;
118#ifndef QT_NO_SHORTCUT
119 void setBuddy(QWidget *);
120 QWidget *buddy() const;
121#endif
122 int heightForWidth(int) const override;
123
124 bool openExternalLinks() const;
125 void setOpenExternalLinks(bool open);
126
127 void setTextInteractionFlags(Qt::TextInteractionFlags flags);
128 Qt::TextInteractionFlags textInteractionFlags() const;
129
130 void setSelection(int, int);
131 bool hasSelectedText() const;
132 QString selectedText() const;
133 int selectionStart() const;
134
135public Q_SLOTS:
136 void setText(const QString &);
137 void setPixmap(const QPixmap &);
138#ifndef QT_NO_PICTURE
139 void setPicture(const QPicture &);
140#endif
141#if QT_CONFIG(movie)
142 void setMovie(QMovie *movie);
143#endif
144 void setNum(int);
145 void setNum(double);
146 void clear();
147
148Q_SIGNALS:
149 void linkActivated(const QString& link);
150 void linkHovered(const QString& link);
151
152protected:
153 bool event(QEvent *e) override;
154 void keyPressEvent(QKeyEvent *ev) override;
155 void paintEvent(QPaintEvent *) override;
156 void changeEvent(QEvent *) override;
157 void mousePressEvent(QMouseEvent *ev) override;
158 void mouseMoveEvent(QMouseEvent *ev) override;
159 void mouseReleaseEvent(QMouseEvent *ev) override;
160#ifndef QT_NO_CONTEXTMENU
161 void contextMenuEvent(QContextMenuEvent *ev) override;
162#endif // QT_NO_CONTEXTMENU
163 void focusInEvent(QFocusEvent *ev) override;
164 void focusOutEvent(QFocusEvent *ev) override;
165 bool focusNextPrevChild(bool next) override;
166
167
168private:
169 Q_DISABLE_COPY(QLabel)
170 Q_DECLARE_PRIVATE(QLabel)
171#if QT_CONFIG(movie)
172 Q_PRIVATE_SLOT(d_func(), void _q_movieUpdated(const QRect&))
173 Q_PRIVATE_SLOT(d_func(), void _q_movieResized(const QSize&))
174#endif
175 Q_PRIVATE_SLOT(d_func(), void _q_linkHovered(const QString &))
176
177#ifndef QT_NO_SHORTCUT
178 Q_PRIVATE_SLOT(d_func(), void _q_buddyDeleted())
179#endif
180 friend class QTipLabel;
181 friend class QMessageBoxPrivate;
182 friend class QBalloonTip;
183};
184
185QT_END_NAMESPACE
186
187#endif // QLABEL_H
188

source code of qtbase/src/widgets/widgets/qlabel.h