- class QKeySequence¶
The
QKeySequence
class encapsulates a key sequence as used by shortcuts. More…Synopsis¶
Methods¶
def
__init__()
def
__getitem__()
def
__reduce__()
def
__repr__()
def
count()
def
isEmpty()
def
matches()
def
__ne__()
def
__lt__()
def
__le__()
def
__eq__()
def
__gt__()
def
__ge__()
def
swap()
def
toString()
Static functions¶
def
fromString()
def
keyBindings()
def
listFromString()
def
listToString()
def
mnemonic()
Note
This documentation may contain snippets that were automatically translated from C++ to Python. We always welcome contributions to the snippet translation. If you see an issue with the translation, you can also let us know by creating a ticket on https:/bugreports.qt.io/projects/PYSIDE
Detailed Description¶
Warning
This section contains snippets that were automatically translated from C++ to Python and may contain errors.
In its most common form, a key sequence describes a combination of keys that must be used together to perform some action. Key sequences are used with
QAction
objects to specify which keyboard shortcuts can be used to trigger actions.Key sequences can be constructed for use as keyboard shortcuts in three different ways:
For standard shortcuts, a
standard key
can be used to request the platform-specific key sequence associated with each shortcut.For custom shortcuts, human-readable strings such as “Ctrl+X” can be used, and these can be translated into the appropriate shortcuts for users of different languages. Translations are made in the “
QShortcut
“ context.For hard-coded shortcuts, integer key codes can be specified with a combination of values defined by the Qt::Key and Qt::KeyboardModifier enum values. Each key code consists of a single Qt::Key value and zero or more modifiers, such as Qt::ShiftModifier, Qt::ControlModifier, Qt::AltModifier and Qt::MetaModifier.
For example, Ctrl P might be a sequence used as a shortcut for printing a document, and can be specified in any of the following ways:
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
Keyboard Layout Issues
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, thetoString()
function produces human-readable strings for use in menus. On Apple platforms, 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.
Note
On Apple platforms, 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. In effect, developers can use the same shortcut descriptions across all platforms, and their applications will automatically work as expected on Apple platforms.
Standard Shortcuts¶
QKeySequence
defines manystandard keyboard shortcuts
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 Apple platforms, the Ctrl value corresponds to the Command keys on the Macintosh keyboard, and the Meta value corresponds to the Control keys.Windows
Apple platforms
KDE Plasma
GNOME
F1
Ctrl+?
F1
F1
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
Ctrl+Shift+S
Ctrl+Shift+S
Ctrl+Shift+S
Ctrl+Shift+S
New
Ctrl+N
Ctrl+N
Ctrl+N
Ctrl+N
Delete
Del
Forward Delete, 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
Preferences
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
Ctrl+Plus
Ctrl+Plus
Ctrl+Plus
Ctrl+Plus
Ctrl+Minus
Ctrl+Minus
Ctrl+Minus
Ctrl+Minus
F11, Alt+Enter
Ctrl+Meta+F
F11, Ctrl+Shift+F
Ctrl+F11
Print
Ctrl+P
Ctrl+P
Ctrl+P
Ctrl+P
Ctrl+T
Ctrl+T
Ctrl+Shift+N, Ctrl+T
Ctrl+T
Ctrl+Tab, Forward, Ctrl+F6
Ctrl+}, Forward, Ctrl+Tab
Ctrl+Tab, Forward, Ctrl+Comma
Ctrl+Tab, Forward
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
F3, Ctrl+G
Ctrl+G
F3
Ctrl+G, F3
Shift+F3, Ctrl+Shift+G
Ctrl+Shift+G
Shift+F3
Ctrl+Shift+G, Shift+F3
Replace
Ctrl+H
(none)
Ctrl+R
Ctrl+H
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
Right
Right, Meta+F
Right
Right
Left
Left, Meta+B
Left
Left
Ctrl+Right
Alt+Right
Ctrl+Right
Ctrl+Right
Ctrl+Left
Alt+Left
Ctrl+Left
Ctrl+Left
Down
Down, Meta+N
Down
Down
Up
Up, Meta+P
Up
Up
PgDown
PgDown, Alt+PgDown, Meta+Down, Meta+PgDown, Meta+V
PgDown
PgDown
PgUp
PgUp, Alt+PgUp, Meta+Up, Meta+PgUp
PgUp
PgUp
Home
Ctrl+Left, Meta+Left
Home
Home
End
Ctrl+Right, Meta+Right
End, Ctrl+E
End, Ctrl+E
(none)
Alt+Up, Meta+A
(none)
(none)
(none)
Alt+Down, Meta+E
(none)
(none)
Ctrl+Home
Ctrl+Up, Home
Ctrl+Home
Ctrl+Home
Ctrl+End
Ctrl+Down, End
Ctrl+End
Ctrl+End
Shift+Right
Shift+Right
Shift+Right
Shift+Right
Shift+Left
Shift+Left
Shift+Left
Shift+Left
Ctrl+Shift+Right
Alt+Shift+Right
Ctrl+Shift+Right
Ctrl+Shift+Right
Ctrl+Shift+Left
Alt+Shift+Left
Ctrl+Shift+Left
Ctrl+Shift+Left
Shift+Down
Shift+Down
Shift+Down
Shift+Down
Shift+Up
Shift+Up
Shift+Up
Shift+Up
Shift+PgDown
Shift+PgDown
Shift+PgDown
Shift+PgDown
Shift+PgUp
Shift+PgUp
Shift+PgUp
Shift+PgUp
Shift+Home
Ctrl+Shift+Left
Shift+Home
Shift+Home
Shift+End
Ctrl+Shift+Right
Shift+End
Shift+End
(none)
Alt+Shift+Up, Meta+Shift+A
(none)
(none)
(none)
Alt+Shift+Down, Meta+Shift+E
(none)
(none)
Ctrl+Shift+Home
Ctrl+Shift+Up, Shift+Home
Ctrl+Shift+Home
Ctrl+Shift+Home
Ctrl+Shift+End
Ctrl+Shift+Down, Shift+End
Ctrl+Shift+End
Ctrl+Shift+End
Ctrl+Backspace
Alt+Backspace
Ctrl+Backspace
Ctrl+Backspace
Ctrl+Del
(none)
Ctrl+Del
Ctrl+Del
(none)
(none)
Ctrl+K
Ctrl+K
(none)
(none)
Ctrl+U
Ctrl+U
Enter
Enter
Enter
Enter
Shift+Enter
Meta+Enter, Meta+O
Shift+Enter
Shift+Enter
Backspace
(none)
Delete, 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.
Keyboard Layout Issues¶
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. However, the = 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
standard shortcuts
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 Style Key Sequences¶
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.
For example, the key sequence, 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
Warning
A QApplication instance must have been constructed before a
QKeySequence
is created; otherwise, your application may crash.See also
- class 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()
.Constant
Description
QKeySequence.AddTab
Add new tab.
QKeySequence.Back
Navigate back.
QKeySequence.Backspace
Delete previous character.
QKeySequence.Bold
Bold text.
QKeySequence.Close
Close document/tab.
QKeySequence.Copy
Copy.
QKeySequence.Cut
Cut.
QKeySequence.Delete
Delete.
QKeySequence.DeleteEndOfLine
Delete end of line.
QKeySequence.DeleteEndOfWord
Delete word from the end of the cursor.
QKeySequence.DeleteStartOfWord
Delete the beginning of a word up to the cursor.
QKeySequence.DeleteCompleteLine
Delete the entire line.
QKeySequence.Find
Find in document.
QKeySequence.FindNext
Find next result.
QKeySequence.FindPrevious
Find previous result.
QKeySequence.Forward
Navigate forward.
QKeySequence.HelpContents
Open help contents.
QKeySequence.InsertLineSeparator
Insert a new line.
QKeySequence.InsertParagraphSeparator
Insert a new paragraph.
QKeySequence.Italic
Italic text.
QKeySequence.MoveToEndOfBlock
Move cursor to end of block. This shortcut is only used on Apple platforms.
QKeySequence.MoveToEndOfDocument
Move cursor to end of document.
QKeySequence.MoveToEndOfLine
Move cursor to end of line.
QKeySequence.MoveToNextChar
Move cursor to next character.
QKeySequence.MoveToNextLine
Move cursor to next line.
QKeySequence.MoveToNextPage
Move cursor to next page.
QKeySequence.MoveToNextWord
Move cursor to next word.
QKeySequence.MoveToPreviousChar
Move cursor to previous character.
QKeySequence.MoveToPreviousLine
Move cursor to previous line.
QKeySequence.MoveToPreviousPage
Move cursor to previous page.
QKeySequence.MoveToPreviousWord
Move cursor to previous word.
QKeySequence.MoveToStartOfBlock
Move cursor to start of a block. This shortcut is only used on Apple platforms.
QKeySequence.MoveToStartOfDocument
Move cursor to start of document.
QKeySequence.MoveToStartOfLine
Move cursor to start of line.
QKeySequence.New
Create new document.
QKeySequence.NextChild
Navigate to next tab or child window.
QKeySequence.Open
Open document.
QKeySequence.Paste
Paste.
QKeySequence.Preferences
Open the preferences dialog.
QKeySequence.PreviousChild
Navigate to previous tab or child window.
QKeySequence.Print
Print document.
QKeySequence.Quit
Quit the application.
QKeySequence.Redo
Redo.
QKeySequence.Refresh
Refresh or reload current document.
QKeySequence.Replace
Find and replace.
QKeySequence.SaveAs
Save document after prompting the user for a file name.
QKeySequence.Save
Save document.
QKeySequence.SelectAll
Select all text.
QKeySequence.Deselect
Deselect text. Since 5.1
QKeySequence.SelectEndOfBlock
Extend selection to the end of a text block. This shortcut is only used on Apple platforms.
QKeySequence.SelectEndOfDocument
Extend selection to end of document.
QKeySequence.SelectEndOfLine
Extend selection to end of line.
QKeySequence.SelectNextChar
Extend selection to next character.
QKeySequence.SelectNextLine
Extend selection to next line.
QKeySequence.SelectNextPage
Extend selection to next page.
QKeySequence.SelectNextWord
Extend selection to next word.
QKeySequence.SelectPreviousChar
Extend selection to previous character.
QKeySequence.SelectPreviousLine
Extend selection to previous line.
QKeySequence.SelectPreviousPage
Extend selection to previous page.
QKeySequence.SelectPreviousWord
Extend selection to previous word.
QKeySequence.SelectStartOfBlock
Extend selection to the start of a text block. This shortcut is only used on Apple platforms.
QKeySequence.SelectStartOfDocument
Extend selection to start of document.
QKeySequence.SelectStartOfLine
Extend selection to start of line.
QKeySequence.Underline
Underline text.
QKeySequence.Undo
Undo.
QKeySequence.UnknownKey
Unbound key.
QKeySequence.WhatsThis
Activate “what’s this”.
QKeySequence.ZoomIn
Zoom in.
QKeySequence.ZoomOut
Zoom out.
QKeySequence.FullScreen
Toggle the window state to/from full screen.
QKeySequence.Cancel
Cancel the current operation.
- class SequenceFormat¶
Constant
Description
QKeySequence.NativeText
The key sequence as a platform specific string. This means that it will be shown translated and on Apple platforms 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
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.
- class SequenceMatch¶
Constant
Description
QKeySequence.NoMatch
The key sequences are different; not even partially matching.
QKeySequence.PartialMatch
The key sequences match partially, but are not the same.
QKeySequence.ExactMatch
The key sequences are the same.
- __init__()¶
Constructs an empty key sequence.
- __init__(key)
- Parameters:
key –
StandardKey
Constructs a
QKeySequence
object for the givenkey
. 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
.- __init__(ks)
- Parameters:
ks –
QKeySequence
Copy constructor. Makes a copy of
keysequence
.- __init__(key[, format=QKeySequence.SequenceFormat.NativeText])
- Parameters:
key – str
format –
SequenceFormat
Warning
This section contains snippets that were automatically translated from C++ to Python and may contain errors.
Creates a key sequence from the
key
string, based onformat
.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:
file = QMenu(self) file.addAction(tr("Open..."), QKeySequence(tr("Ctrl+O", "File|Open")), self.open)
Note the “File|Open” translator comment. It is by no means necessary, but it provides some context for the human translator.
- __init__(k1[, k2=QKeyCombination.fromCombined(0)[, k3=QKeyCombination.fromCombined(0)[, k4=QKeyCombination.fromCombined(0)]]])
- Parameters:
k1 –
QKeyCombination
k2 –
QKeyCombination
k3 –
QKeyCombination
k4 –
QKeyCombination
Constructs a key sequence with up to 4 keys
k1
,k2
,k3
andk4
.See also
- __init__(k1[, k2=0[, k3=0[, k4=0]]])
- Parameters:
k1 – int
k2 – int
k3 – int
k4 – int
Constructs a key sequence with up to 4 keys
k1
,k2
,k3
andk4
.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, or Qt::MetaModifier.
- __getitem__()¶
- __reduce__()¶
- Return type:
str
- __repr__()¶
- Return type:
str
- count()¶
- Return type:
int
Returns the number of keys in the key sequence. The maximum is 4.
- static fromString(str[, format=QKeySequence.SequenceFormat.PortableText])¶
- Parameters:
str – str
format –
SequenceFormat
- Return type:
Return a
QKeySequence
from the stringstr
based onformat
.See also
- isEmpty()¶
- Return type:
bool
Returns
true
if the key sequence is empty; otherwise returns false.- static keyBindings(key)¶
- Parameters:
key –
StandardKey
- Return type:
.list of QKeySequence
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 givenkey
.- static listFromString(str[, format=QKeySequence.SequenceFormat.PortableText])¶
- Parameters:
str – str
format –
SequenceFormat
- Return type:
.list of QKeySequence
Return a list of
QKeySequence
from the stringstr
based onformat
.See also
- static listToString(list[, format=QKeySequence.SequenceFormat.PortableText])¶
- Parameters:
list – .list of QKeySequence
format –
SequenceFormat
- Return type:
str
Return a string representation of
list
based onformat
.See also
- matches(seq)¶
- Parameters:
seq –
QKeySequence
- Return type:
Matches the sequence with
seq
. ReturnsExactMatch
if successful,PartialMatch
ifseq
matches incompletely, andNoMatch
if the sequences have nothing in common. ReturnsNoMatch
ifseq
is shorter.- static mnemonic(text)¶
- Parameters:
text – str
- Return type:
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”) returnsALT+Key_Q
, and mnemonic(“Quit”) returns an emptyQKeySequence
.- __ne__(other)¶
- Parameters:
other –
QKeySequence
- Return type:
bool
Returns
true
if this key sequence is not equal to theother
key sequence; otherwise returnsfalse
.- __lt__(ks)¶
- Parameters:
ks –
QKeySequence
- Return type:
bool
Provides an arbitrary comparison of this key sequence and
other
key sequence. All that is guaranteed is that the operator returnsfalse
if both key sequences are equal and that (ks1 < ks2) == !( ks2 < ks1) if the key sequences are not equal.This function is useful in some circumstances, for example if you want to use
QKeySequence
objects as keys in a QMap.See also
operator==()
operator!=()
operator>()
operator
operator>=()
- __le__(other)¶
- Parameters:
other –
QKeySequence
- Return type:
bool
Returns
true
if this key sequence is smaller or equal to theother
key sequence; otherwise returnsfalse
.See also
operator==()
operator!=()
operator
operator>()
operator>=()
- __eq__(other)¶
- Parameters:
other –
QKeySequence
- Return type:
bool
Returns
true
if this key sequence is equal to theother
key sequence; otherwise returnsfalse
.- __gt__(other)¶
- Parameters:
other –
QKeySequence
- Return type:
bool
Returns
true
if this key sequence is larger than theother
key sequence; otherwise returnsfalse
.See also
operator==()
operator!=()
operator
operator
operator>=()
- __ge__(other)¶
- Parameters:
other –
QKeySequence
- Return type:
bool
Returns
true
if this key sequence is larger or equal to theother
key sequence; otherwise returnsfalse
.See also
operator==()
operator!=()
operator
operator>()
operator
- swap(other)¶
- Parameters:
other –
QKeySequence
Swaps key sequence
other
with this key sequence. This operation is very fast and never fails.- toString([format=QKeySequence.SequenceFormat.PortableText])¶
- Parameters:
format –
SequenceFormat
- Return type:
str
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 Apple platforms, the string returned resembles the sequence that is shown in the menu bar if
format
isNativeText
; otherwise, the string uses the “portable” format, suitable for writing to a file.See also