QShortcut 类用于创建键盘快捷方式。 更多...
| 头： | #include <QShortcut> |
| CMake: |
find_package(Qt6 REQUIRED COMPONENTS Gui)
target_link_libraries(mytarget PRIVATE Qt6::Gui) |
| qmake: | QT += gui |
| 继承： | QObject |
| QShortcut (QObject * parent ) | |
| QShortcut (const QKeySequence & key , QObject * parent , const char * member = nullptr, const char * ambiguousMember = nullptr, Qt::ShortcutContext context = Qt::WindowShortcut) | |
| QShortcut (QKeySequence::StandardKey standardKey , QObject * parent , const char * member = nullptr, const char * ambiguousMember = nullptr, Qt::ShortcutContext context = Qt::WindowShortcut) | |
| QShortcut (const QKeySequence & key , QObject * parent , Functor functor , Qt::ShortcutContext shortcutContext = Qt::WindowShortcut) | |
| QShortcut (const QKeySequence & key , QObject * parent , const QObject * context , Functor functor , Qt::ShortcutContext shortcutContext = Qt::WindowShortcut) | |
| QShortcut (const QKeySequence & key , QObject * parent , const QObject * context , Functor functor , FunctorAmbiguous functorAmbiguous , Qt::ShortcutContext shortcutContext = Qt::WindowShortcut) | |
| QShortcut (const QKeySequence & key , QObject * parent , const QObject * context1 , Functor functor , const QObject * context2 , FunctorAmbiguous functorAmbiguous , Qt::ShortcutContext shortcutContext = Qt::WindowShortcut) | |
| QShortcut (QKeySequence::StandardKey key , QObject * parent , Functor functor , Qt::ShortcutContext shortcutContext = Qt::WindowShortcut) | |
| QShortcut (QKeySequence::StandardKey key , QObject * parent , const QObject * context , Functor functor , Qt::ShortcutContext shortcutContext = Qt::WindowShortcut) | |
| QShortcut (QKeySequence::StandardKey key , QObject * parent , const QObject * context , Functor functor , FunctorAmbiguous functorAmbiguous , Qt::ShortcutContext shortcutContext = Qt::WindowShortcut) | |
| QShortcut (QKeySequence::StandardKey key , QObject * parent , const QObject * context1 , Functor functor , const QObject * context2 , FunctorAmbiguous functorAmbiguous , Qt::ShortcutContext shortcutContext = Qt::WindowShortcut) | |
| virtual | ~QShortcut () |
| bool | autoRepeat () const |
| Qt::ShortcutContext | context () const |
| bool | isEnabled () const |
| QKeySequence | key () const |
| QList<QKeySequence> | keys () const |
| QWidget * | parentWidget () const |
| void | setAutoRepeat (bool on ) |
| void | setContext (Qt::ShortcutContext context ) |
| void | setEnabled (bool enable ) |
| void | setKey (const QKeySequence & key ) |
| void | setKeys (QKeySequence::StandardKey key ) |
| void | setKeys (const QList<QKeySequence> & keys ) |
| void | setWhatsThis (const QString & text ) |
| QString | whatsThis () const |
| void | activated () |
| void | activatedAmbiguously () |
QShortcut 类提供办法以将键盘快捷方式连接到 Qt 的 信号和槽 机制，以便可以通报对象当执行快捷方式时。可以将快捷键方式设为包含描述键盘快捷方式的所有必要键按下，包括修饰符键的状态，譬如 Shift , Ctrl ，和 Alt .
在 Widget 应用程序中，某些 Widget 可以在字符前使用 &。这会为该字符自动创建助记符 (快捷方式)，如 E&xit 将创建快捷方式 Alt+X (使用 && 能显示实际和号)。Widget 可以按给定快捷方式消耗并履行动作。在 X11，和号不显示且字符会加下划线。在 Windows，快捷方式通常不显示直到用户按下 Alt 键，但这是用户可以改变的设定。在 Mac，默认禁用快捷方式。调用 qt_set_sequence_auto_mnemonic () 以启用它们。不管怎样，由于助记快捷方式不符合 Aqua 指导方针，Qt 不会展示带下划线的快捷方式字符。
对于使用菜单的应用程序，更方便可能是使用提供的方便函数在 QMenu 类以将键盘快捷方式赋值给菜单项 (当创建它们时)。另外，快捷方式可以关联其它动作类型在 QAction 类。
为特定 Widget 创建快捷方式的最简单办法，是采用键序列构造快捷方式。例如：
shortcut = new QShortcut(QKeySequence(tr("Ctrl+O", "File|Open")), parent);
当用户键入 键序列 为给定快捷方式，快捷方式的 activated () 信号被发射 (在歧义性情况下， activatedAmbiguously () 信号被发射)。由 Qt 事件循环 "监听" 快捷方式，当快捷方式的父级 Widget 在接收事件时。
可以设置快捷方式的键序列采用 setKey () 和检索采用 key ()。可以启用 (或禁用) 快捷方式采用 setEnabled ()，和可以拥有 What's This? 帮助文本设置采用 setWhatsThis ().
另请参阅 QShortcutEvent , QKeySequence ，和 QAction .
此特性保持快捷方式是否可以自动重复
If true, the shortcut will auto repeat when the keyboard shortcut combination is held down, provided that keyboard auto repeat is enabled on the system. The default value is true.
访问函数：
| bool | autoRepeat () const |
| void | setAutoRepeat (bool on ) |
This property holds the context in which the shortcut is valid
A shortcut's context decides in which circumstances a shortcut is allowed to be triggered. The normal context is Qt::WindowShortcut , which allows the shortcut to trigger if the parent (the widget containing the shortcut) is a subwidget of the active top-level window.
默认情况下，此特性被设为 Qt::WindowShortcut .
访问函数：
| Qt::ShortcutContext | context () const |
| void | setContext (Qt::ShortcutContext context ) |
此特性保持快捷方式是否被启用
An enabled shortcut emits the activated () 或 activatedAmbiguously () signal when a QShortcutEvent occurs that matches the shortcut's key () sequence.
若应用程序在
WhatsThis
mode the shortcut will not emit the signals, but will show the "What's This?" text instead.
默认情况下，此特性为
true
.
访问函数：
| bool | isEnabled () const |
| void | setEnabled (bool enable ) |
另请参阅 whatsThis .
This property holds the shortcut's primary key sequence
This is a key sequence with an optional combination of Shift, Ctrl, and Alt. The key sequence may be supplied in a number of ways:
setKey(0); // no signal emitted setKey(QKeySequence()); // no signal emitted setKey(0x3b1); // Greek letter alpha setKey(Qt::Key_D); // 'd', e.g. to delete setKey('q'); // 'q', e.g. to quit setKey(Qt::CTRL | Qt::Key_P); // Ctrl+P, e.g. to print document setKey("Ctrl+P"); // Ctrl+P, e.g. to print document
默认情况下，此特性包含空键序列。
访问函数：
| QKeySequence | key () const |
| void | setKey (const QKeySequence & key ) |
[explicit]
QShortcut::
QShortcut
(
QObject
*
parent
)
Constructs a QShortcut object for the parent , which should be a QWindow 或 QWidget .
Since no shortcut key sequence is specified, the shortcut will not emit any signals.
另请参阅 setKey ().
[explicit]
QShortcut::
QShortcut
(const
QKeySequence
&
key
,
QObject
*
parent
, const
char
*
member
= nullptr, const
char
*
ambiguousMember
= nullptr,
Qt::ShortcutContext
context
= Qt::WindowShortcut)
Constructs a QShortcut object for the parent , which should be a QWindow 或 QWidget .
The shortcut operates on its parent, listening for QShortcutEvent 匹配 key 序列。根据事件的歧义性，快捷方式将调用 member 函数，或 ambiguousMember 函数，若键按下在快捷方式的 context .
[explicit, since 6.0]
QShortcut::
QShortcut
(
QKeySequence::StandardKey
standardKey
,
QObject
*
parent
, const
char
*
member
= nullptr, const
char
*
ambiguousMember
= nullptr,
Qt::ShortcutContext
context
= Qt::WindowShortcut)
Constructs a QShortcut object for the parent , which should be a QWindow 或 QWidget .
The shortcut operates on its parent, listening for QShortcutEvent 匹配 standardKey . Depending on the ambiguity of the event, the shortcut will call the member 函数，或 ambiguousMember 函数，若键按下在快捷方式的 context .
该函数在 Qt 6.0 引入。
这是重载函数。
This is a QShortcut convenience constructor which connects the shortcut's activated () 信号到 functor .
这是重载函数。
This is a QShortcut convenience constructor which connects the shortcut's activated () 信号到 functor .
The functor can be a pointer to a member function of the context 对象。
若 context object is destroyed, the functor 不会被调用。
这是重载函数。
This is a QShortcut convenience constructor which connects the shortcut's activated () 信号到 functor and activatedAmbiguously () 信号到 functorAmbiguous .
The functor and functorAmbiguous can be a pointer to a member function of the context 对象。
若 context object is destroyed, the functor and functorAmbiguous 不会被调用。
这是重载函数。
This is a QShortcut convenience constructor which connects the shortcut's activated () 信号到 functor and activatedAmbiguously () 信号到 functorAmbiguous .
The functor can be a pointer to a member function of the context1 对象。 functorAmbiguous can be a pointer to a member function of the context2 对象。
若 context1 object is destroyed, the functor will not be called. If the context2 object is destroyed, the functorAmbiguous 不会被调用。
[since 6.0]
template <typename Functor> QShortcut::
QShortcut
(
QKeySequence::StandardKey
key
,
QObject
*
parent
,
Functor
functor
,
Qt::ShortcutContext
shortcutContext
= Qt::WindowShortcut)
这是重载函数。
This is a QShortcut convenience constructor which connects the shortcut's activated () 信号到 functor .
该函数在 Qt 6.0 引入。
[since 6.0]
template <typename Functor> QShortcut::
QShortcut
(
QKeySequence::StandardKey
key
,
QObject
*
parent
, const
QObject
*
context
,
Functor
functor
,
Qt::ShortcutContext
shortcutContext
= Qt::WindowShortcut)
这是重载函数。
This is a QShortcut convenience constructor which connects the shortcut's activated () 信号到 functor .
The functor can be a pointer to a member function of the context 对象。
若 context object is destroyed, the functor 不会被调用。
该函数在 Qt 6.0 引入。
[since 6.0]
template <typename Functor, typename FunctorAmbiguous> QShortcut::
QShortcut
(
QKeySequence::StandardKey
key
,
QObject
*
parent
, const
QObject
*
context
,
Functor
functor
,
FunctorAmbiguous
functorAmbiguous
,
Qt::ShortcutContext
shortcutContext
= Qt::WindowShortcut)
这是重载函数。
This is a QShortcut convenience constructor which connects the shortcut's activated () 信号到 functor and activatedAmbiguously () 信号到 functorAmbiguous .
The functor and functorAmbiguous can be a pointer to a member function of the context 对象。
若 context object is destroyed, the functor and functorAmbiguous 不会被调用。
该函数在 Qt 6.0 引入。
[since 6.0]
template <typename Functor, typename FunctorAmbiguous> QShortcut::
QShortcut
(
QKeySequence::StandardKey
key
,
QObject
*
parent
, const
QObject
*
context1
,
Functor
functor
, const
QObject
*
context2
,
FunctorAmbiguous
functorAmbiguous
,
Qt::ShortcutContext
shortcutContext
= Qt::WindowShortcut)
这是重载函数。
This is a QShortcut convenience constructor which connects the shortcut's activated () 信号到 functor and activatedAmbiguously () 信号到 functorAmbiguous .
The functor can be a pointer to a member function of the context1 对象。 functorAmbiguous can be a pointer to a member function of the context2 对象。
若 context1 object is destroyed, the functor will not be called. If the context2 object is destroyed, the functorAmbiguous 不会被调用。
该函数在 Qt 6.0 引入。
[虚拟]
QShortcut::
~QShortcut
()
销毁快捷方式。
[signal]
void
QShortcut::
activated
()
此信号被发射，当用户键入快捷方式的键序列时。
另请参阅 activatedAmbiguously ().
[signal]
void
QShortcut::
activatedAmbiguously
()
When a key sequence is being typed at the keyboard, it is said to be ambiguous as long as it matches the start of more than one shortcut.
When a shortcut's key sequence is completed, activatedAmbiguously() is emitted if the key sequence is still ambiguous (i.e., it is the start of one or more other shortcuts). The activated () signal is not emitted in this case.
另请参阅 activated ().
[since 6.0]
QList
<
QKeySequence
> QShortcut::
keys
() const
Returns the list of key sequences which trigger this shortcut.
该函数在 Qt 6.0 引入。
返回快捷方式的父级 Widget。
[since 6.0]
void
QShortcut::
setKeys
(
QKeySequence::StandardKey
key
)
Sets the triggers to those matching the standard key key .
该函数在 Qt 6.0 引入。
[since 6.0]
void
QShortcut::
setKeys
(const
QList
<
QKeySequence
> &
keys
)
设置 keys as the list of key sequences that trigger the shortcut.
该函数在 Qt 6.0 引入。
Sets the shortcut's "What's This?" help text .
The text will be shown when a widget application is in "What's This?" mode and the user types the shortcut key () sequence.
To set "What's This?" help on a menu item (with or without a shortcut key), set the help on the item's action.
By default, the help text is an empty string.
This function has no effect in applications that don't use widgets.
另请参阅 whatsThis (), QWhatsThis::inWhatsThisMode ()，和 QAction::setWhatsThis ().
Returns the shortcut's "What's This?" help text.
另请参阅 setWhatsThis ().