QKeySequence 类

QKeySequence(QKeySequence::Print);
QKeySequence(tr("Ctrl+P"));
QKeySequence(tr("Ctrl+p"));
QKeySequence(Qt::CTRL + Qt::Key_P);
					

QKeySequence(tr("Ctrl+X, Ctrl+C"));
QKeySequence(Qt::CTRL + Qt::Key_X, Qt::CTRL + Qt::Key_C);
					

enum QKeySequence:: StandardKey

This enum represent standard key bindings. They can be used to assign platform dependent keyboard shortcuts to a QAction .

Note that the key bindings are platform dependent. The currently bound shortcuts can be queried using keyBindings ().

该枚举在 Qt 4.2 引入或被修改。

成员函数文档编制

QKeySequence:: QKeySequence ()

构造空的键序列。

QKeySequence:: QKeySequence (const QString & key , SequenceFormat format = NativeText)

创建键序列从 key 字符串，基于 format .

For example "Ctrl+O" gives CTRL+'O'. The strings "Ctrl", "Shift", "Alt" and "Meta" are recognized, as well as their translated equivalents in the " QShortcut " context (using QObject::tr ()).

Up to four key codes may be entered by separating them with commas, e.g. "Alt+X,Ctrl+S,Q".

This constructor is typically used with tr (), so that shortcut keys can be replaced in translations:

QMenu *file = new QMenu(this);
file->addAction(tr("&Open..."), this, SLOT(open()),
                  QKeySequence(tr("Ctrl+O", "File|Open")));
				

Note the "File|Open" translator comment. It is by no means necessary, but it provides some context for the human translator.

QKeySequence:: QKeySequence ( int k1 , int k2 = 0, int k3 = 0, int k4 = 0)

Constructs a key sequence with up to 4 keys k1 , k2 , k3 and k4 .

The key codes are listed in Qt::Key and can be combined with modifiers (see Qt::Modifier ) such as Qt::SHIFT , Qt::CTRL , Qt::ALT ，或 Qt::META .

QKeySequence:: QKeySequence (const QKeySequence & keysequence )

Copy constructor. Makes a copy of keysequence .

QKeySequence:: QKeySequence ( StandardKey key )

构造 QKeySequence object for the given key . The result will depend on the currently running platform.

The resulting object will be based on the first element in the list of key bindings for the key .

该函数在 Qt 4.2 引入。

QKeySequence:: ~QKeySequence ()

销毁键序列。

int QKeySequence:: count () const

Returns the number of keys in the key sequence. The maximum is 4.

[static] QKeySequence QKeySequence:: fromString (const QString & str , SequenceFormat format = PortableText)

返回 QKeySequence 从字符串 str 基于 format .

该函数在 Qt 4.1 引入。

另请参阅 toString ().

bool QKeySequence:: isEmpty () const

返回 true if the key sequence is empty; otherwise returns false.

[static] QList < QKeySequence > QKeySequence:: keyBindings ( StandardKey key )

Returns a list of key bindings for the given key . The result of calling this function will vary based on the target platform. The first element of the list indicates the primary shortcut for the given platform. If the result contains more than one result, these can be considered alternative shortcuts on the same platform for the given key .

该函数在 Qt 4.2 引入。

[static] QList < QKeySequence > QKeySequence:: listFromString (const QString & str , SequenceFormat format = PortableText)

Return a list of QKeySequence 从字符串 str 基于 format .

该函数在 Qt 5.1 引入。

另请参阅 fromString () 和 listToString ().

[static] QString QKeySequence:: listToString (const QList < QKeySequence > & list , SequenceFormat format = PortableText)

Return a string representation of list 基于 format .

该函数在 Qt 5.1 引入。

另请参阅 toString () 和 listFromString ().

SequenceMatch QKeySequence:: 匹配 (const QKeySequence & seq ) const

Matches the sequence with seq 。返回 ExactMatch if successful, PartialMatch if seq matches incompletely, and NoMatch if the sequences have nothing in common. Returns NoMatch if seq is shorter.

[static] QKeySequence QKeySequence:: mnemonic (const QString & text )

Returns the shortcut key sequence for the mnemonic in text , or an empty key sequence if no mnemonics are found.

For example, mnemonic("E&xit") returns Qt::ALT+Qt::Key_X , mnemonic("&Quit") returns ALT+Key_Q , and mnemonic("Quit") returns an empty QKeySequence .

We provide a list of common mnemonics in English. At the time of writing, Microsoft and Open Group do not appear to have issued equivalent recommendations for other languages.

void QKeySequence:: swap ( QKeySequence & other )

Swaps key sequence other with this key sequence. This operation is very fast and never fails.

该函数在 Qt 4.8 引入。

QString QKeySequence:: toString ( SequenceFormat format = PortableText) const

Return a string representation of the key sequence, based on format .

For example, the value Qt::CTRL + Qt::Key_O results in "Ctrl+O". If the key sequence has multiple key codes, each is separated by commas in the string returned, such as "Alt+X, Ctrl+Y, Z". The strings, "Ctrl", "Shift", etc. are translated using QObject::tr () in the " QShortcut " context.

If the key sequence has no keys, an empty string is returned.

On macOS, the string returned resembles the sequence that is shown in the menu bar if format is QKeySequence::NativeText ; otherwise, the string uses the "portable" format, suitable for writing to a file.

该函数在 Qt 4.1 引入。

另请参阅 fromString ().

QKeySequence:: operator QVariant () const

Returns the key sequence as a QVariant

bool QKeySequence:: operator!= (const QKeySequence & other ) const

返回 true if this key sequence is not equal to the other key sequence; otherwise returns false .

bool QKeySequence:: operator< (const QKeySequence & other ) const

Provides an arbitrary comparison of this key sequence and other key sequence. All that is guaranteed is that the operator returns false if both key sequences are equal and that (ks1 < ks2) == !( ks2 < ks1) if the key sequences are not equal.

此函数在某些情况下很有用，例如，若想要使用 QKeySequence 对象作为键在 QMap .

另请参阅 operator== (), operator!= (), operator> (), operator<= ()，和 operator>= ().

bool QKeySequence:: operator<= (const QKeySequence & other ) const

返回 true if this key sequence is smaller or equal to the other key sequence; otherwise returns false .

另请参阅 operator== (), operator!= (), operator< (), operator> ()，和 operator>= ().

QKeySequence &QKeySequence:: operator= (const QKeySequence & other )

Assignment operator. Assigns the other key sequence to this object.

QKeySequence &QKeySequence:: operator= ( QKeySequence && other )

移动赋值 other 到此 QKeySequence 实例。

该函数在 Qt 5.2 引入。

bool QKeySequence:: operator== (const QKeySequence & other ) const

返回 true if this key sequence is equal to the other key sequence; otherwise returns false .

bool QKeySequence:: operator> (const QKeySequence & other ) const

返回 true if this key sequence is larger than the other key sequence; otherwise returns false .

另请参阅 operator== (), operator!= (), operator< (), operator<= ()，和 operator>= ().

bool QKeySequence:: operator>= (const QKeySequence & other ) const

返回 true if this key sequence is larger or equal to the other key sequence; otherwise returns false .

另请参阅 operator== (), operator!= (), operator< (), operator> ()，和 operator<= ().

int QKeySequence:: operator[] ( uint index ) const

Returns a reference to the element at position index in the key sequence. This can only be used to read an element.

相关非成员

void qt_set_sequence_auto_mnemonic ( bool b )

Specifies whether mnemonics for menu items, labels, etc., should be honored or not. On Windows and X11, this feature is on by default; on macOS, it is off. When this feature is off (that is, when b is false), QKeySequence::mnemonic () always returns an empty string.

注意： This function is not declared in any of Qt's header files. To use it in your application, declare the function prototype before calling it.

另请参阅 QShortcut .

QDataStream & operator<< ( QDataStream & stream , const QKeySequence & sequence )

Writes the key sequence 到 stream .

另请参阅 QDataStream 运算符格式 .

QDataStream & operator>> ( QDataStream & stream , QKeySequence & sequence )

Reads a key sequence from the stream into the key sequence .

另请参阅 QDataStream 运算符格式 .