QShortcut 類用於創建鍵盤快捷方式。 更多...
| 頭： | #include <QShortcut> |
| CMake: |
find_package(Qt6 REQUIRED COMPONENTS Gui)
target_link_libraries(mytarget PRIVATE Qt6::Gui) |
| qmake: | QT += gui |
| 繼承： | 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 類提供辦法以將鍵盤快捷方式連接到 Qt 的 信號/槽 機製，以便可以通報對象當執行快捷方式時。可以將快捷鍵方式設為包含描述鍵盤快捷方式的所有必要鍵按下，包括修飾符鍵的狀態，譬如 Shift , Ctrl ，和 Alt .
In widget applications, certain widgets can use '&' in front of a character. This will automatically create a mnemonic (a shortcut) for that character, e.g. "E&xit" will create the shortcut Alt+X (使用 && 能顯示實際和號)。Widget 可以按給定快捷方式消耗並履行動作。在 X11，和號不顯示且字符會加下劃綫。在 Windows，快捷方式通常不顯示直到用戶按下 Alt 鍵，但這是用戶可以改變的設定。在 Mac，默認禁用快捷方式。調用 qt_set_sequence_auto_mnemonic () 以啓用它們。不管怎樣，由於助記快捷方式不符閤 Aqua 指導方針，Qt 不會展示帶下劃綫的快捷方式字符。
對於使用菜單的應用程序，更方便可能是使用提供的方便函數在 QMenu 類以將鍵盤快捷方式賦值給菜單項 (當創建它們時)。另外，快捷方式可以關聯其它動作類型在 QAction 類。
為特定 Widget 創建快捷方式的最簡單辦法，是采用鍵序列構造快捷方式。例如：
shortcut = new QShortcut(QKeySequence(tr("Ctrl+O", "File|Open")), parent);
當用戶鍵入 鍵序列 為給定快捷方式，快捷方式的 activated () 信號發射 (在歧義性情況下， activatedAmbiguously () 信號發射)。由 Qt 事件循環 "監聽" 快捷方式，當快捷方式的父級 Widget 在接收事件時。
可以設置快捷方式的鍵序列采用 setKey () 和檢索采用 key ()。可以啓用 (或禁用) 快捷方式采用 setEnabled ()，和可以擁有 What's This? 幫助文本設置采用 setWhatsThis ().
另請參閱 QShortcutEvent , QKeySequence ，和 QAction .
此特性保持快捷方式是否可以自動重復
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.
訪問函數：
| 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.
默認情況下，此特性被設為 Qt::WindowShortcut .
訪問函數：
| Qt::ShortcutContext | context () const |
| void | setContext (Qt::ShortcutContext context ) |
此特性保持快捷方式是否被啓用
An enabled shortcut emits the activated () 或 activatedAmbiguously () signal when a QShortcutEvent occurs that matches the shortcut's key () sequence.
若應用程序在
WhatsThis
mode the shortcut will not emit the signals, but will show the "What's This?" text instead.
默認情況下，此特性為
true
.
訪問函數：
| bool | isEnabled () const |
| void | setEnabled (bool enable ) |
另請參閱 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
默認情況下，此特性包含空鍵序列。
訪問函數：
| 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.
另請參閱 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。根據事件的歧義性，快捷方式將調用 member 函數，或 ambiguousMember 函數，若鍵按下在快捷方式的 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 函數，或 ambiguousMember 函數，若鍵按下在快捷方式的 context .
該函數在 Qt 6.0 引入。
這是重載函數。
This is a QShortcut convenience constructor which connects the shortcut's activated () 信號到 functor .
這是重載函數。
This is a QShortcut convenience constructor which connects the shortcut's activated () 信號到 functor .
The functor can be a pointer to a member function of the context 對象。
若 context object is destroyed, the functor 不會被調用。
這是重載函數。
This is a QShortcut convenience constructor which connects the shortcut's activated () 信號到 functor and activatedAmbiguously () 信號到 functorAmbiguous .
The functor and functorAmbiguous can be a pointer to a member function of the context 對象。
若 context object is destroyed, the functor and functorAmbiguous 不會被調用。
這是重載函數。
This is a QShortcut convenience constructor which connects the shortcut's activated () 信號到 functor and activatedAmbiguously () 信號到 functorAmbiguous .
The functor can be a pointer to a member function of the context1 對象。 functorAmbiguous can be a pointer to a member function of the context2 對象。
若 context1 object is destroyed, the functor will not be called. If the context2 object is destroyed, the functorAmbiguous 不會被調用。
[since 6.0]
template <typename Functor> QShortcut::
QShortcut
(
QKeySequence::StandardKey
key
,
QObject
*
parent
,
Functor
functor
,
Qt::ShortcutContext
shortcutContext
= Qt::WindowShortcut)
這是重載函數。
This is a QShortcut convenience constructor which connects the shortcut's activated () 信號到 functor .
該函數在 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)
這是重載函數。
This is a QShortcut convenience constructor which connects the shortcut's activated () 信號到 functor .
The functor can be a pointer to a member function of the context 對象。
若 context object is destroyed, the functor 不會被調用。
該函數在 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)
這是重載函數。
This is a QShortcut convenience constructor which connects the shortcut's activated () 信號到 functor and activatedAmbiguously () 信號到 functorAmbiguous .
The functor and functorAmbiguous can be a pointer to a member function of the context 對象。
若 context object is destroyed, the functor and functorAmbiguous 不會被調用。
該函數在 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)
這是重載函數。
This is a QShortcut convenience constructor which connects the shortcut's activated () 信號到 functor and activatedAmbiguously () 信號到 functorAmbiguous .
The functor can be a pointer to a member function of the context1 對象。 functorAmbiguous can be a pointer to a member function of the context2 對象。
若 context1 object is destroyed, the functor will not be called. If the context2 object is destroyed, the functorAmbiguous 不會被調用。
該函數在 Qt 6.0 引入。
[虛擬]
QShortcut::
~QShortcut
()
銷毀快捷方式。
[signal]
void
QShortcut::
activated
()
此信號被發射，當用戶鍵入快捷方式的鍵序列時。
另請參閱 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.
另請參閱 activated ().
[since 6.0]
QList
<
QKeySequence
> QShortcut::
keys
() const
Returns the list of key sequences which trigger this shortcut.
該函數在 Qt 6.0 引入。
返迴快捷方式的父級 Widget。
[since 6.0]
void
QShortcut::
setKeys
(
QKeySequence::StandardKey
key
)
Sets the triggers to those matching the standard key key .
該函數在 Qt 6.0 引入。
[since 6.0]
void
QShortcut::
setKeys
(const
QList
<
QKeySequence
> &
keys
)
設置 keys as the list of key sequences that trigger the shortcut.
該函數在 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.
另請參閱 whatsThis (), QWhatsThis::inWhatsThisMode ()，和 QAction::setWhatsThis ().
Returns the shortcut's "What's This?" help text.
另請參閱 setWhatsThis ().