QKeySequence 类

QKeySequence 类封装作为快捷键使用的键序列。 更多...

头：	#include <QKeySequence>
CMake:	find_package(Qt6 REQUIRED COMPONENTS Gui) target_link_libraries(mytarget PRIVATE Qt6::Gui)
qmake:	QT += gui

• 所有成员列表，包括继承成员
• QKeySequence 属于 隐式共享类 .

公共类型

enum	SequenceFormat { NativeText, PortableText }
enum	SequenceMatch { NoMatch, PartialMatch, ExactMatch }
enum	StandardKey { AddTab, Back, Backspace, Bold, Close, …, Cancel }

公共函数

	QKeySequence ()
	QKeySequence (const QString & key , QKeySequence::SequenceFormat format = NativeText)
	QKeySequence (int k1 , int k2 = 0, int k3 = 0, int k4 = 0)
	QKeySequence (QKeyCombination k1 , QKeyCombination k2 = QKeyCombination::fromCombined(0), QKeyCombination k3 = QKeyCombination::fromCombined(0), QKeyCombination k4 = QKeyCombination::fromCombined(0))
	QKeySequence (QKeySequence::StandardKey key )
	QKeySequence (const QKeySequence & keysequence )
	~QKeySequence ()
int	count () const
bool	isEmpty () const
QKeySequence::SequenceMatch	matches (const QKeySequence & seq ) const
void	swap (QKeySequence & other )
QString	toString (QKeySequence::SequenceFormat format = PortableText) const
QVariant	operator QVariant () const
bool	operator!= (const QKeySequence & other ) const
bool	operator< (const QKeySequence & other ) const
bool	operator<= (const QKeySequence & other ) const
QKeySequence &	operator= (const QKeySequence & other )
QKeySequence &	operator= (QKeySequence && other )
bool	operator== (const QKeySequence & other ) const
bool	operator> (const QKeySequence & other ) const
bool	operator>= (const QKeySequence & other ) const
QKeyCombination	operator[] (uint index ) const

静态公共成员

QKeySequence	fromString (const QString & str , QKeySequence::SequenceFormat format = PortableText)
QList<QKeySequence>	keyBindings (QKeySequence::StandardKey key )
QList<QKeySequence>	listFromString (const QString & str , QKeySequence::SequenceFormat format = PortableText)
QString	listToString (const QList<QKeySequence> & list , QKeySequence::SequenceFormat format = PortableText)
QKeySequence	mnemonic (const QString & text )

相关非成员

size_t	qHash (const QKeySequence & key , size_t seed = 0)
void	qt_set_sequence_auto_mnemonic (bool b )
QDataStream &	operator<< (QDataStream & stream , const QKeySequence & sequence )
QDataStream &	operator>> (QDataStream & stream , QKeySequence & sequence )

详细描述

在最常见形式中，键序列描述必须一起使用以履行某些动作的键组合。键序列用于 QAction 对象以指定可以使用哪些键盘快捷方式来触发动作。

为用作键盘快捷方式，可以按 3 种不同方式构造键序列：

• 对于标准快捷方式， 标准键 可以用于请求关联各快捷方式的特定平台键序列。
• 对于自定义快捷方式，可以使用人类可读字符串 (譬如 Ctrl+X)，且可以将这些翻译成用于不同语言用户的合适快捷方式。翻译的进行是在 QShortcut 上下文。
• 对于硬编码快捷方式，可以采用值的组合指定整数键代码定义通过 Qt::Key and Qt::KeyboardModifier 枚举值。各键码的组成由单个 Qt::Key 值和 0 个或更多修饰符，譬如 Qt::ShiftModifier , Qt::ControlModifier , Qt::AltModifier and Qt::MetaModifier .

例如， Ctrl P 可能是用作打印文档的快捷方式序列，且可以按以下任一方式指定：

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

Note that, for letters, the case used in the specification string does not matter. In the above examples, the user does not need to hold down the Shift key to activate a shortcut specified with "Ctrl+P". However, for other keys, the use of Shift as an unspecified extra modifier key can lead to confusion for users of an application whose keyboards have different layouts to those used by the developers. See the 键盘布局问题 section below for more details.

It is preferable to use standard shortcuts where possible. When creating key sequences for non-standard shortcuts, you should use human-readable strings in preference to hard-coded integer values.

QKeySequence objects can be cast to a QString to obtain a human-readable translated version of the sequence. Similarly, the toString () function produces human-readable strings for use in menus. On macOS, the appropriate symbols are used to describe keyboard shortcuts using special keys on the Macintosh keyboard.

An alternative way to specify hard-coded key codes is to use the Unicode code point of the character; for example, 'A' gives the same key sequence as Qt::Key_A .

注意： On macOS, references to "Ctrl", Qt::CTRL , Qt::Key_Control and Qt::ControlModifier correspond to the Command keys on the Macintosh keyboard, and references to "Meta", Qt::META , Qt::Key_Meta and Qt::MetaModifier correspond to the Control keys. Developers on macOS can use the same shortcut descriptions across all platforms, and their applications will automatically work as expected on macOS.

标准快捷键

QKeySequence defines many 标准键盘快捷键 to reduce the amount of effort required when setting up actions in a typical application. The table below shows some common key sequences that are often used for these standard shortcuts by applications on four widely-used platforms. Note that on macOS, the Ctrl value corresponds to the Command keys on the Macintosh keyboard, and the Meta value corresponds to the Control keys.

StandardKey	Windows	macOS	KDE Plasma	GNOME
HelpContents	F1	Ctrl+?	F1	F1
WhatsThis	Shift+F1	Shift+F1	Shift+F1	Shift+F1
Open	Ctrl+O	Ctrl+O	Ctrl+O	Ctrl+O
Close	Ctrl+F4, Ctrl+W	Ctrl+W, Ctrl+F4	Ctrl+W	Ctrl+W
Save	Ctrl+S	Ctrl+S	Ctrl+S	Ctrl+S
Quit		Ctrl+Q	Ctrl+Q	Ctrl+Q
SaveAs		Ctrl+Shift+S		Ctrl+Shift+S
New	Ctrl+N	Ctrl+N	Ctrl+N	Ctrl+N
删除	Del	Del, Meta+D	Del, Ctrl+D	Del, Ctrl+D
Cut	Ctrl+X, Shift+Del	Ctrl+X, Meta+K	Ctrl+X, F20, Shift+Del	Ctrl+X, F20, Shift+Del
Copy	Ctrl+C, Ctrl+Ins	Ctrl+C	Ctrl+C, F16, Ctrl+Ins	Ctrl+C, F16, Ctrl+Ins
Paste	Ctrl+V, Shift+Ins	Ctrl+V, Meta+Y	Ctrl+V, F18, Shift+Ins	Ctrl+V, F18, Shift+Ins
首选项		Ctrl+,
Undo	Ctrl+Z, Alt+Backspace	Ctrl+Z	Ctrl+Z, F14	Ctrl+Z, F14
Redo	Ctrl+Y, Shift+Ctrl+Z, Alt+Shift+Backspace	Ctrl+Shift+Z	Ctrl+Shift+Z	Ctrl+Shift+Z
Back	Alt+Left, Backspace	Ctrl+[	Alt+Left	Alt+Left
Forward	Alt+Right, Shift+Backspace	Ctrl+]	Alt+Right	Alt+Right
Refresh	F5	F5	F5	Ctrl+R, F5
ZoomIn	Ctrl+Plus	Ctrl+Plus	Ctrl+Plus	Ctrl+Plus
ZoomOut	Ctrl+Minus	Ctrl+Minus	Ctrl+Minus	Ctrl+Minus
FullScreen	F11, Alt+Enter	Ctrl+Meta+F	F11, Ctrl+Shift+F	Ctrl+F11
打印	Ctrl+P	Ctrl+P	Ctrl+P	Ctrl+P
AddTab	Ctrl+T	Ctrl+T	Ctrl+Shift+N, Ctrl+T	Ctrl+T
NextChild	Ctrl+Tab, Forward, Ctrl+F6	Ctrl+}, Forward, Ctrl+Tab	Ctrl+Tab, Forward, Ctrl+Comma	Ctrl+Tab, Forward
PreviousChild	Ctrl+Shift+Tab, Back, Ctrl+Shift+F6	Ctrl+{, Back, Ctrl+Shift+Tab	Ctrl+Shift+Tab, Back, Ctrl+Period	Ctrl+Shift+Tab, Back
Find	Ctrl+F	Ctrl+F	Ctrl+F	Ctrl+F
FindNext	F3, Ctrl+G	Ctrl+G	F3	Ctrl+G, F3
FindPrevious	Shift+F3, Ctrl+Shift+G	Ctrl+Shift+G	Shift+F3	Ctrl+Shift+G, Shift+F3
替换	Ctrl+H	(none)	Ctrl+R	Ctrl+H
SelectAll	Ctrl+A	Ctrl+A	Ctrl+A	Ctrl+A
Deselect			Ctrl+Shift+A	Ctrl+Shift+A
Bold	Ctrl+B	Ctrl+B	Ctrl+B	Ctrl+B
Italic	Ctrl+I	Ctrl+I	Ctrl+I	Ctrl+I
Underline	Ctrl+U	Ctrl+U	Ctrl+U	Ctrl+U
MoveToNextChar	Right	Right, Meta+F	Right	Right
MoveToPreviousChar	Left	Left, Meta+B	Left	Left
MoveToNextWord	Ctrl+Right	Alt+Right	Ctrl+Right	Ctrl+Right
MoveToPreviousWord	Ctrl+Left	Alt+Left	Ctrl+Left	Ctrl+Left
MoveToNextLine	Down	Down, Meta+N	Down	Down
MoveToPreviousLine	Up	Up, Meta+P	Up	Up
MoveToNextPage	PgDown	PgDown, Alt+PgDown, Meta+Down, Meta+PgDown, Meta+V	PgDown	PgDown
MoveToPreviousPage	PgUp	PgUp, Alt+PgUp, Meta+Up, Meta+PgUp	PgUp	PgUp
MoveToStartOfLine	Home	Ctrl+Left, Meta+Left	Home	Home
MoveToEndOfLine	End	Ctrl+Right, Meta+Right	End, Ctrl+E	End, Ctrl+E
MoveToStartOfBlock	(none)	Alt+Up, Meta+A	(none)	(none)
MoveToEndOfBlock	(none)	Alt+Down, Meta+E	(none)	(none)
MoveToStartOfDocument	Ctrl+Home	Ctrl+Up, Home	Ctrl+Home	Ctrl+Home
MoveToEndOfDocument	Ctrl+End	Ctrl+Down, End	Ctrl+End	Ctrl+End
SelectNextChar	Shift+Right	Shift+Right	Shift+Right	Shift+Right
SelectPreviousChar	Shift+Left	Shift+Left	Shift+Left	Shift+Left
SelectNextWord	Ctrl+Shift+Right	Alt+Shift+Right	Ctrl+Shift+Right	Ctrl+Shift+Right
SelectPreviousWord	Ctrl+Shift+Left	Alt+Shift+Left	Ctrl+Shift+Left	Ctrl+Shift+Left
SelectNextLine	Shift+Down	Shift+Down	Shift+Down	Shift+Down
SelectPreviousLine	Shift+Up	Shift+Up	Shift+Up	Shift+Up
SelectNextPage	Shift+PgDown	Shift+PgDown	Shift+PgDown	Shift+PgDown
SelectPreviousPage	Shift+PgUp	Shift+PgUp	Shift+PgUp	Shift+PgUp
SelectStartOfLine	Shift+Home	Ctrl+Shift+Left	Shift+Home	Shift+Home
SelectEndOfLine	Shift+End	Ctrl+Shift+Right	Shift+End	Shift+End
SelectStartOfBlock	(none)	Alt+Shift+Up, Meta+Shift+A	(none)	(none)
SelectEndOfBlock	(none)	Alt+Shift+Down, Meta+Shift+E	(none)	(none)
SelectStartOfDocument	Ctrl+Shift+Home	Ctrl+Shift+Up, Shift+Home	Ctrl+Shift+Home	Ctrl+Shift+Home
SelectEndOfDocument	Ctrl+Shift+End	Ctrl+Shift+Down, Shift+End	Ctrl+Shift+End	Ctrl+Shift+End
DeleteStartOfWord	Ctrl+Backspace	Alt+Backspace	Ctrl+Backspace	Ctrl+Backspace
DeleteEndOfWord	Ctrl+Del	(none)	Ctrl+Del	Ctrl+Del
DeleteEndOfLine	(none)	(none)	Ctrl+K	Ctrl+K
DeleteCompleteLine	(none)	(none)	Ctrl+U	Ctrl+U
InsertParagraphSeparator	Enter	Enter	Enter	Enter
InsertLineSeparator	Shift+Enter	Meta+Enter, Meta+O	Shift+Enter	Shift+Enter
Backspace	(none)	Meta+H	(none)	(none)
Cancel	Escape	Escape, Ctrl+.	Escape	Escape

Note that, since the key sequences used for the standard shortcuts differ between platforms, you still need to test your shortcuts on each platform to ensure that you do not unintentionally assign the same key sequence to many actions.

键盘布局问题

Many key sequence specifications are chosen by developers based on the layout of certain types of keyboard, rather than choosing keys that represent the first letter of an action's name, such as Ctrl S ("Ctrl+S") or Ctrl C ("Ctrl+C"). Additionally, because certain symbols can only be entered with the help of modifier keys on certain keyboard layouts, key sequences intended for use with one keyboard layout may map to a different key, map to no keys at all, or require an additional modifier key to be used on different keyboard layouts.

For example, the shortcuts, Ctrl plus and Ctrl minus , are often used as shortcuts for zoom operations in graphics applications, and these may be specified as "Ctrl++" and "Ctrl+-" respectively. However, the way these shortcuts are specified and interpreted depends on the keyboard layout. Users of Norwegian keyboards will note that the + and - keys are not adjacent on the keyboard, but will still be able to activate both shortcuts without needing to press the Shift key. However, users with British keyboards will need to hold down the Shift key to enter the + symbol, making the shortcut effectively the same as "Ctrl+Shift+=".

Although some developers might resort to fully specifying all the modifiers they use on their keyboards to activate a shortcut, this will also result in unexpected behavior for users of different keyboard layouts.

For example, a developer using a British keyboard may decide to specify "Ctrl+Shift+=" as the key sequence in order to create a shortcut that coincidentally behaves in the same way as Ctrl plus 。不管怎样， = key needs to be accessed using the Shift key on Norwegian keyboard, making the required shortcut effectively Ctrl Shift Shift = (an impossible key combination).

As a result, both human-readable strings and hard-coded key codes can both be problematic to use when specifying a key sequence that can be used on a variety of different keyboard layouts. Only the use of 标准快捷键 guarantees that the user will be able to use the shortcuts that the developer intended.

Despite this, we can address this issue by ensuring that human-readable strings are used, making it possible for translations of key sequences to be made for users of different languages. This approach will be successful for users whose keyboards have the most typical layout for the language they are using.

GNU Emacs 样式键序列

Key sequences similar to those used in GNU Emacs , allowing up to four key codes, can be created by using the multiple argument constructor, or by passing a human-readable string of comma-separated key sequences.

例如，键序列， Ctrl X followed by Ctrl C , can be specified using either of the following ways:

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

警告： A QApplication instance must have been constructed before a QKeySequence is created; otherwise, your application may crash.

另请参阅 QShortcut .

成员类型文档编制

enum QKeySequence:: SequenceFormat

常量	值	描述
QKeySequence::NativeText	0	The key sequence as a platform specific string. This means that it will be shown translated and on the Mac it will resemble a key sequence from the menu bar. This enum is best used when you want to display the string to the user.
QKeySequence::PortableText	1	The key sequence is given in a "portable" format, suitable for reading and writing to a file. In many cases, it will look similar to the native text on Windows and X11.

enum QKeySequence:: SequenceMatch

常量	值	描述
QKeySequence::NoMatch	0	The key sequences are different; not even partially matching.
QKeySequence::PartialMatch	1	The key sequences match partially, but are not the same.
QKeySequence::ExactMatch	2	The key sequences are the same.

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 ().

常量	值	描述
QKeySequence::AddTab	19	添加新选项卡。
QKeySequence::Back	13	向后导航。
QKeySequence::Backspace	69	删除上一字符。
QKeySequence::Bold	27	加粗文本。
QKeySequence::Close	4	关闭文档/选项卡。
QKeySequence::Copy	9	拷贝。
QKeySequence::Cut	8	剪切。
QKeySequence::Delete	7	删除。
QKeySequence::DeleteEndOfLine	60	删除行尾。
QKeySequence::DeleteEndOfWord	59	Delete word from the end of the cursor.
QKeySequence::DeleteStartOfWord	58	Delete the beginning of a word up to the cursor.
QKeySequence::DeleteCompleteLine	68	Delete the entire line.
QKeySequence::Find	22	在文档中查找。
QKeySequence::FindNext	23	查找下一结果。
QKeySequence::FindPrevious	24	查找上一结果。
QKeySequence::Forward	14	向前导航。
QKeySequence::HelpContents	1	打开帮助内容。
QKeySequence::InsertLineSeparator	62	Insert a new line.
QKeySequence::InsertParagraphSeparator	61	Insert a new paragraph.
QKeySequence::Italic	28	Italic text.
QKeySequence::MoveToEndOfBlock	41	Move cursor to end of block. This shortcut is only used on the macOS.
QKeySequence::MoveToEndOfDocument	43	Move cursor to end of document.
QKeySequence::MoveToEndOfLine	39	移动光标到行尾。
QKeySequence::MoveToNextChar	30	移动光标到下一字符。
QKeySequence::MoveToNextLine	34	移动光标到下一行。
QKeySequence::MoveToNextPage	36	移动光标到下一页。
QKeySequence::MoveToNextWord	32	移动光标到下一单词。
QKeySequence::MoveToPreviousChar	31	移动光标到上一字符。
QKeySequence::MoveToPreviousLine	35	移动光标到上一行。
QKeySequence::MoveToPreviousPage	37	移动光标到上一页。
QKeySequence::MoveToPreviousWord	33	Move cursor to previous word.
QKeySequence::MoveToStartOfBlock	40	Move cursor to start of a block. This shortcut is only used on macOS.
QKeySequence::MoveToStartOfDocument	42	Move cursor to start of document.
QKeySequence::MoveToStartOfLine	38	移动光标到行起始。
QKeySequence::New	6	创建新文档。
QKeySequence::NextChild	20	Navigate to next tab or child window.
QKeySequence::Open	3	打开文档。
QKeySequence::Paste	10	粘贴。
QKeySequence::Preferences	64	打开首选项对话框。
QKeySequence::PreviousChild	21	Navigate to previous tab or child window.
QKeySequence::Print	18	打印文档。
QKeySequence::Quit	65	离开应用程序。
QKeySequence::Redo	12	重做。
QKeySequence::Refresh	15	Refresh or reload current document.
QKeySequence::Replace	25	查找并替换。
QKeySequence::SaveAs	63	Save document after prompting the user for a file name.
QKeySequence::Save	5	保存文档。
QKeySequence::SelectAll	26	选择所有文本。
QKeySequence::Deselect	67	Deselect text. Since 5.1
QKeySequence::SelectEndOfBlock	55	Extend selection to the end of a text block. This shortcut is only used on macOS.
QKeySequence::SelectEndOfDocument	57	Extend selection to end of document.
QKeySequence::SelectEndOfLine	53	Extend selection to end of line.
QKeySequence::SelectNextChar	44	Extend selection to next character.
QKeySequence::SelectNextLine	48	Extend selection to next line.
QKeySequence::SelectNextPage	50	Extend selection to next page.
QKeySequence::SelectNextWord	46	Extend selection to next word.
QKeySequence::SelectPreviousChar	45	Extend selection to previous character.
QKeySequence::SelectPreviousLine	49	Extend selection to previous line.
QKeySequence::SelectPreviousPage	51	Extend selection to previous page.
QKeySequence::SelectPreviousWord	47	Extend selection to previous word.
QKeySequence::SelectStartOfBlock	54	Extend selection to the start of a text block. This shortcut is only used on macOS.
QKeySequence::SelectStartOfDocument	56	Extend selection to start of document.
QKeySequence::SelectStartOfLine	52	Extend selection to start of line.
QKeySequence::Underline	29	下划线文本。
QKeySequence::Undo	11	撤消。
QKeySequence::UnknownKey	0	未绑定键。
QKeySequence::WhatsThis	2	Activate "what's this".
QKeySequence::ZoomIn	16	放大。
QKeySequence::ZoomOut	17	缩小。
QKeySequence::FullScreen	66	Toggle the window state to/from full screen.
QKeySequence::Cancel	70	取消当前操作。

成员函数文档编制

QKeySequence:: QKeySequence ()

构造空的键序列。

QKeySequence:: QKeySequence (const QString & key , QKeySequence::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..."), QKeySequence(tr("Ctrl+O", "File|Open")),
                this, &MainWindow::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::KeyboardModifier ) such as Qt::ShiftModifier , Qt::ControlModifier , Qt::AltModifier ，或 Qt::MetaModifier .

QKeySequence:: QKeySequence ( QKeyCombination k1 , QKeyCombination k2 = QKeyCombination::fromCombined(0), QKeyCombination k3 = QKeyCombination::fromCombined(0), QKeyCombination k4 = QKeyCombination::fromCombined(0))

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

另请参阅 QKeyCombination .

QKeySequence:: QKeySequence ( QKeySequence::StandardKey key )

Constructs a 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 .

QKeySequence:: QKeySequence (const QKeySequence & keysequence )

Copy constructor. Makes a copy of keysequence .

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 , QKeySequence::SequenceFormat format = PortableText)

返回 QKeySequence 从字符串 str 基于 format .

另请参阅 toString ().

bool QKeySequence:: isEmpty () const

返回 true 若键序列为空；否则返回 false。

[static] QList < QKeySequence > QKeySequence:: keyBindings ( QKeySequence::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 .

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

返回列表化的 QKeySequence 从字符串 str 基于 format .

另请参阅 fromString () 和 listToString ().

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

返回字符串表示为 list 基于 format .

另请参阅 toString () 和 listFromString ().

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

匹配序列同 seq 。返回 ExactMatch 若成功， PartialMatch if seq 匹配不完整，和 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.

例如，mnemonic("E&xit") 返回 Qt::ALT+Qt::Key_X ，mnemonic("&Quit") 返回 ALT+Key_Q ，而 mnemonic("Quit") 返回空 QKeySequence .

void QKeySequence:: swap ( QKeySequence & other )

交换键序列 other 与此键序列。此操作非常快且从不失败。

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

返回键序列的字符串表示，基于 format .

例如，值 Qt::CTRL + Qt::Key_O 结果为 Ctrl+O。若键序列拥有多个键代码，则以逗号分隔返回字符串中的各个键代码 (譬如 Alt+X, Ctrl+Y, Z)。字符串 Ctrl、Shift 等的翻译是使用 QObject::tr () 在 QShortcut 上下文。

若键序列没有键，则返回空字符串。

On macOS, the string returned resembles the sequence that is shown in the menu bar if format is QKeySequence::NativeText ；否则，字符串使用 portable (可移植) 格式，适合写入文件。

另请参阅 fromString ().

QVariant QKeySequence:: operator QVariant () const

Returns the key sequence as a QVariant

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

返回 true 若此键序列不等于 other 键序列；否则返回 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 键序列；否则返回 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。

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

返回 true if this key sequence is equal to the other 键序列；否则返回 false .

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

返回 true if this key sequence is larger than the other 键序列；否则返回 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 键序列；否则返回 false .

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

QKeyCombination 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

size_t qHash (const QKeySequence & key , size_t seed = 0)

Calculates the hash value of key ，使用 seed 做计算种子。

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 .

内容

• 公共类型

• 公共函数

• 静态公共成员

• 相关非成员

• 详细描述

• 标准快捷键

• 键盘布局问题

• GNU Emacs 样式键序列