qlabel.h

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QLABEL_H
#define QLABEL_H
 
#include <QtWidgets/qtwidgetsglobal.h>
#include <QtWidgets/qframe.h>
#include <QtGui/qpicture.h>
#include <QtGui/qtextdocument.h>
 
QT_REQUIRE_CONFIG(label);
 
QT_BEGIN_NAMESPACE
 
 
class QLabelPrivate;
 
class Q_WIDGETS_EXPORT QLabel : public QFrame
{
    Q_OBJECT
    Q_PROPERTY(QString text READ text WRITE setText)
    Q_PROPERTY(Qt::TextFormat textFormat READ textFormat WRITE setTextFormat)
    Q_PROPERTY(QPixmap pixmap READ pixmap WRITE setPixmap)
    Q_PROPERTY(bool scaledContents READ hasScaledContents WRITE setScaledContents)
    Q_PROPERTY(Qt::Alignment alignment READ alignment WRITE setAlignment)
    Q_PROPERTY(bool wordWrap READ wordWrap WRITE setWordWrap)
    Q_PROPERTY(int margin READ margin WRITE setMargin)
    Q_PROPERTY(int indent READ indent WRITE setIndent)
    Q_PROPERTY(bool openExternalLinks READ openExternalLinks WRITE setOpenExternalLinks)
    Q_PROPERTY(Qt::TextInteractionFlags textInteractionFlags READ textInteractionFlags
               WRITE setTextInteractionFlags)
    Q_PROPERTY(bool hasSelectedText READ hasSelectedText)
    Q_PROPERTY(QString selectedText READ selectedText)
 
public:
    explicit QLabel(QWidget *parent=nullptr, Qt::WindowFlags f=Qt::WindowFlags());
    explicit QLabel(const QString &text, QWidget *parent=nullptr, Qt::WindowFlags f=Qt::WindowFlags());
    ~QLabel();
 
    QString text() const;
 
#if QT_DEPRECATED_SINCE(6,6)
    QPixmap pixmap(Qt::ReturnByValueConstant) const { return pixmap(); }
#endif
    QPixmap pixmap() const;
 
#ifndef QT_NO_PICTURE
#if QT_DEPRECATED_SINCE(6,6)
    QPicture picture(Qt::ReturnByValueConstant) const { return picture(); }
#endif
    QPicture picture() const;
#endif
#if QT_CONFIG(movie)
    QMovie *movie() const;
#endif
 
    Qt::TextFormat textFormat() const;
    void setTextFormat(Qt::TextFormat);
 
    QTextDocument::ResourceProvider resourceProvider() const;
    void setResourceProvider(const QTextDocument::ResourceProvider &provider);
 
    Qt::Alignment alignment() const;
    void setAlignment(Qt::Alignment);
 
    void setWordWrap(bool on);
    bool wordWrap() const;
 
    int indent() const;
    void setIndent(int);
 
    int margin() const;
    void setMargin(int);
 
    bool hasScaledContents() const;
    void setScaledContents(bool);
    QSize sizeHint() const override;
    QSize minimumSizeHint() const override;
#ifndef QT_NO_SHORTCUT
    void setBuddy(QWidget *);
    QWidget *buddy() const;
#endif
    int heightForWidth(int) const override;
 
    bool openExternalLinks() const;
    void setOpenExternalLinks(bool open);
 
    void setTextInteractionFlags(Qt::TextInteractionFlags flags);
    Qt::TextInteractionFlags textInteractionFlags() const;
 
    void setSelection(int, int);
    bool hasSelectedText() const;
    QString selectedText() const;
    int selectionStart() const;
 
public Q_SLOTS:
    void setText(const QString &);
    void setPixmap(const QPixmap &);
#ifndef QT_NO_PICTURE
    void setPicture(const QPicture &);
#endif
#if QT_CONFIG(movie)
    void setMovie(QMovie *movie);
#endif
    void setNum(int);
    void setNum(double);
    void clear();
 
Q_SIGNALS:
    void linkActivated(const QString& link);
    void linkHovered(const QString& link);
 
protected:
    bool event(QEvent *e) override;
    void keyPressEvent(QKeyEvent *ev) override;
    void paintEvent(QPaintEvent *) override;
    void changeEvent(QEvent *) override;
    void mousePressEvent(QMouseEvent *ev) override;
    void mouseMoveEvent(QMouseEvent *ev) override;
    void mouseReleaseEvent(QMouseEvent *ev) override;
#ifndef QT_NO_CONTEXTMENU
    void contextMenuEvent(QContextMenuEvent *ev) override;
#endif // QT_NO_CONTEXTMENU
    void focusInEvent(QFocusEvent *ev) override;
    void focusOutEvent(QFocusEvent *ev) override;
    bool focusNextPrevChild(bool next) override;
 
 
private:
    Q_DISABLE_COPY(QLabel)
    Q_DECLARE_PRIVATE(QLabel)
#if QT_CONFIG(movie)
    Q_PRIVATE_SLOT(d_func(), void _q_movieUpdated(const QRect&))
    Q_PRIVATE_SLOT(d_func(), void _q_movieResized(const QSize&))
#endif
    Q_PRIVATE_SLOT(d_func(), void _q_linkHovered(const QString &))
 
#ifndef QT_NO_SHORTCUT
    Q_PRIVATE_SLOT(d_func(), void _q_buddyDeleted())
#endif
    friend class QTipLabel;
    friend class QMessageBoxPrivate;
    friend class QBalloonTip;
};
 
QT_END_NAMESPACE
 
#endif // QLABEL_H