QKeySequence Class Reference |
StandardKey | Windows | Mac OS X | KDE | 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 |
New | Ctrl+N | Ctrl+N | Ctrl+N | Ctrl+N |
Delete | Del | Del, Meta+D | Del, Ctrl+D | Del, Ctrl+D |
Cut | Ctrl+X, Shift+Del | Ctrl+X | 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 | Ctrl+V, F18, Shift+Ins | Ctrl+V, F18, Shift+Ins |
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+Y | 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 |
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, F3 |
Replace | Ctrl+H | (none) | Ctrl+R | Ctrl+H |
SelectAll | Ctrl+A | Ctrl+A | Ctrl+A | Ctrl+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 | Right | Right |
MoveToPreviousChar | Left | Left | Left | Left |
MoveToNextWord | Ctrl+Right | Alt+Right | Ctrl+Right | Ctrl+Right |
MoveToPreviousWord | Ctrl+Left | Alt+Left | Ctrl+Left | Ctrl+Left |
MoveToNextLine | Down | Down | Down | Down |
MoveToPreviousLine | Up | Up | Up | Up |
MoveToNextPage | PgDown | PgDown, Alt+PgDown, Meta+Down, Meta+PgDown | 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 | End |
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 | (none) | (none) |
SelectEndOfBlock | (none) | Alt+Shift+Down | (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 |
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.
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.
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)
See also QShortcut.
Constant | Value | Description |
---|---|---|
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. |
Constant | Value | Description |
---|---|---|
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. |
This enum represent standard key bindings. They can be used to assign platform dependent keyboard shortcuts to a QAction. QKeyEvent also provides the function QKeyEvent::standardKey() to query if it matches an existing key binding.
Note that the key bindings are platform dependent. The currently bound shortcuts can be queried using keyBindings().
Constant | Value | Description |
---|---|---|
QKeySequence::UnknownKey | 0 | Unbound key. |
QKeySequence::HelpContents | 1 | Open help contents. |
QKeySequence::WhatsThis | 2 | Activate whats this. |
QKeySequence::Open | 3 | Open Document. |
QKeySequence::Close | 4 | Close Document/Tab. |
QKeySequence::Save | 5 | Save Document. |
QKeySequence::New | 6 | Create new Document. |
QKeySequence::Delete | 7 | Delete. |
QKeySequence::Cut | 8 | Cut. |
QKeySequence::Copy | 9 | Copy. |
QKeySequence::Paste | 10 | Paste. |
QKeySequence::Undo | 11 | Undo. |
QKeySequence::Redo | 12 | Redo. |
QKeySequence::Back | 13 | Navigate back. |
QKeySequence::Forward | 14 | Navigate forward. |
QKeySequence::Refresh | 15 | Refresh or reload current document. |
QKeySequence::ZoomIn | 16 | Zoom in. |
QKeySequence::ZoomOut | 17 | Zoom out. |
QKeySequence::Print | 18 | Print document. |
QKeySequence::AddTab | 19 | Add new tab. |
QKeySequence::NextChild | 20 | Navigate to next tab or child window. |
QKeySequence::PreviousChild | 21 | Navigate to previous tab or child window. |
QKeySequence::Find | 22 | Find in document. |
QKeySequence::FindNext | 23 | Find next result. |
QKeySequence::FindPrevious | 24 | Find previous result. |
QKeySequence::Replace | 25 | Find and replace. |
QKeySequence::SelectAll | 26 | Select all text. |
QKeySequence::Bold | 27 | Bold text. |
QKeySequence::Italic | 28 | Italic text. |
QKeySequence::Underline | 29 | Underline text. |
QKeySequence::MoveToNextChar | 30 | Move cursor to next character. |
QKeySequence::MoveToPreviousChar | 31 | Move cursor to previous character. |
QKeySequence::MoveToNextWord | 32 | Move cursor to next word. |
QKeySequence::MoveToPreviousWord | 33 | Move cursor to previous word. |
QKeySequence::MoveToNextLine | 34 | Move cursor to next line. |
QKeySequence::MoveToPreviousLine | 35 | Move cursor to previous line. |
QKeySequence::MoveToNextPage | 36 | Move cursor to next page. |
QKeySequence::MoveToPreviousPage | 37 | Move cursor to previous page. |
QKeySequence::MoveToStartOfLine | 38 | Move cursor to start of line. |
QKeySequence::MoveToEndOfLine | 39 | Move cursor to end of line. |
QKeySequence::MoveToStartOfBlock | 40 | Move cursor to start of a block. This shortcut is only used on OS X. |
QKeySequence::MoveToEndOfBlock | 41 | Move cursor to end of block. This shortcut is only used on the OS X. |
QKeySequence::MoveToStartOfDocument | 42 | Move cursor to start of document. |
QKeySequence::MoveToEndOfDocument | 43 | Move cursor to end of document. |
QKeySequence::SelectNextChar | 44 | Extend selection to next character. |
QKeySequence::SelectPreviousChar | 45 | Extend selection to previous character. |
QKeySequence::SelectNextWord | 46 | Extend selection to next word. |
QKeySequence::SelectPreviousWord | 47 | Extend selection to previous word. |
QKeySequence::SelectNextLine | 48 | Extend selection to next line. |
QKeySequence::SelectPreviousLine | 49 | Extend selection to previous line. |
QKeySequence::SelectNextPage | 50 | Extend selection to next page. |
QKeySequence::SelectPreviousPage | 51 | Extend selection to previous page. |
QKeySequence::SelectStartOfLine | 52 | Extend selection to start of line. |
QKeySequence::SelectEndOfLine | 53 | Extend selection to end of line. |
QKeySequence::SelectStartOfBlock | 54 | Extend selection to the start of a text block. This shortcut is only used on OS X. |
QKeySequence::SelectEndOfBlock | 55 | Extend selection to the end of a text block. This shortcut is only used on OS X. |
QKeySequence::SelectStartOfDocument | 56 | Extend selection to start of document. |
QKeySequence::SelectEndOfDocument | 57 | Extend selection to end of document. |
QKeySequence::DeleteStartOfWord | 58 | Delete the beginning of a word up to the cursor. |
QKeySequence::DeleteEndOfWord | 59 | Delete word from the end of the cursor. |
QKeySequence::DeleteEndOfLine | 60 | Delete end of line. |
This enum was introduced in Qt 4.2.
Constructs an empty key sequence.
Creates a key sequence from the key string. 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.
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, or Qt::META.
Copy constructor. Makes a copy of keysequence.
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.
This function was introduced in Qt 4.2.
Destroys the key sequence.
Returns the number of keys in the key sequence. The maximum is 4.
Return a QKeySequence from the string str based on format.
This function was introduced in Qt 4.1.
See also toString().
Returns true if the key sequence is empty; otherwise returns false.
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.
This function was introduced in Qt 4.2.
Matches the sequence with seq. Returns ExactMatch if successful, PartialMatch if seq matches incompletely, and NoMatch if the sequences have nothing in common. Returns NoMatch if seq is shorter.
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.
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 Mac OS X, the string returned resembles the sequence that is shown in the menu bar.
This function was introduced in Qt 4.1.
See also fromString().
Returns the key sequence as a QVariant
Returns true if this key sequence is not equal to the other key sequence; otherwise returns false.
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.
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<=(), and operator>=().
Returns true if this key sequence is smaller or equal to the other key sequence; otherwise returns false.
See also operator==(), operator!=(), operator<(), operator>(), and operator>=().
Assignment operator. Assigns the other key sequence to this object.
Returns true if this key sequence is equal to the other key sequence; otherwise returns false.
Returns true if this key sequence is larger than the other key sequence; otherwise returns false.
See also operator==(), operator!=(), operator<(), operator<=(), and operator>=().
Returns true if this key sequence is larger or equal to the other key sequence; otherwise returns false.
See also operator==(), operator!=(), operator<(), operator>(), and operator<=().
Returns a reference to the element at position index in the key sequence. This can only be used to read an element.
This is an overloaded member function, provided for convenience.
Writes the key sequence to the stream.
See also Format of the QDataStream operators.
This is an overloaded member function, provided for convenience.
Reads a key sequence from the stream into the key sequence.
See also Format of the QDataStream operators.
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