C

Qt QML Type

Provides a global object with useful enums and functions from Qt. More...

Import Statement:	import QtQuick
Since:	Qt Quick Ultralite 1.0

List of all members, including inherited members

Properties

AlignmentFlag : enumeration
Key : enumeration
Orientation : enumeration
uiLanguage : string

Methods

font font(object fontConfiguration)
matrix4x4 matrix4x4(real m11, real m12, real m13, real m14, real m21, real m22, real m23, real m24, real m31, real m32, real m33, real m34, real m41, real m42, real m43, real m44)
string resolvedUrl(String url)
color rgba(real red, real green, real blue, real alpha)

Detailed Description

The Qt object is a global object with utility functions, properties and enums.

It is not instantiable; to use it, call the members of the global Qt object directly. For example:

import QtQuick 2.15

Text {
    color: Qt.rgba(1, 0, 0, 1)
    text: "hello, world"
}

Enums

The Qt object contains some of the enums available in the Qt Namespace. For example, you can access the Qt::Vertical enumeration value as Qt.Vertical.

Types

If the QtQuick module has been imported, the following helper functions for creating objects of specific data types are also available for clients to use:

color - use Qt.rgba()
font - use Qt.font()
matrix4x4 - use Qt.matrix4x4()

Property Documentation

[since Qt Quick Ultralite 2.8] AlignmentFlag : enumeration

This enum type is used to describe alignment. It contains horizontal and vertical flags that can be combined to produce the required effect.

The horizontal flags are:

Constant	Description
`AlignLeft`	Aligns with the left edge.
`AlignRight`	Aligns with the right edge.
`AlignHCenter`	Centers horizontally in the available space.

The vertical flags are:

Constant	Description
`AlignTop`	Aligns with the top.
`AlignBottom`	Aligns with the bottom.
`AlignVCenter`	Centers vertically in the available space.

You can use only one of the horizontal flags at a time. There is one two-dimensional flag:

Constant	Description
`AlignCenter`	Centers in both dimensions.

You can use only one horizontal and one vertical flag at a time. Qt::AlignCenter counts as both horizontal and vertical.

Conflicting combinations of flags have undefined meanings.

This property was introduced in Qt Quick Ultralite 2.8.

Key : enumeration

The key names used by Qt.

Constant	Description
`Key_Escape`
`Key_Tab`
`Key_Backtab`
`Key_Backspace`
`Key_Return`
`Key_Enter`	Typically located on the keypad.
`Key_Insert`
`Key_Delete`
`Key_Pause`	The Pause/Break key (Note: Not related to pausing media)
`Key_Print`
`Key_SysReq`
`Key_Clear`	Corresponds to the Clear key on selected Apple keyboard models. On other systems it is commonly mapped to the numeric keypad key 5, when Num Lock is `off`.
`Key_Home`
`Key_End`
`Key_Left`
`Key_Up`
`Key_Right`
`Key_Down`
`Key_PageUp`
`Key_PageDown`
`Key_Shift`
`Key_Control`	On macOS, this corresponds to the Command keys.
`Key_Meta`	On macOS, this corresponds to the Control keys. On Windows keyboards, this key is mapped to the Windows key.
`Key_Alt`
`Key_AltGr`	On Windows, when the KeyDown event for this key is sent, the Ctrl+Alt modifiers are also set.
`Key_CapsLock`
`Key_NumLock`
`Key_ScrollLock`
`Key_F1`
`Key_F2`
`Key_F3`
`Key_F4`
`Key_F5`
`Key_F6`
`Key_F7`
`Key_F8`
`Key_F9`
`Key_F10`
`Key_F11`
`Key_F12`
`Key_F13`
`Key_F14`
`Key_F15`
`Key_F16`
`Key_F17`
`Key_F18`
`Key_F19`
`Key_F20`
`Key_F21`
`Key_F22`
`Key_F23`
`Key_F24`
`Key_F25`
`Key_F26`
`Key_F27`
`Key_F28`
`Key_F29`
`Key_F30`
`Key_F31`
`Key_F32`
`Key_F33`
`Key_F34`
`Key_F35`
`Key_Super_L`
`Key_Super_R`
`Key_Menu`
`Key_Hyper_L`
`Key_Hyper_R`
`Key_Help`
`Key_Direction_L`
`Key_Direction_R`
`Key_Space`
`Key_Any`
`Key_Exclam`
`Key_QuoteDbl`
`Key_NumberSign`
`Key_Dollar`
`Key_Percent`
`Key_Ampersand`
`Key_Apostrophe`
`Key_ParenLeft`
`Key_ParenRight`
`Key_Asterisk`
`Key_Plus`
`Key_Comma`
`Key_Minus`
`Key_Period`
`Key_Slash`
`Key_0`
`Key_1`
`Key_2`
`Key_3`
`Key_4`
`Key_5`
`Key_6`
`Key_7`
`Key_8`
`Key_9`
`Key_Colon`
`Key_Semicolon`
`Key_Less`
`Key_Equal`
`Key_Greater`
`Key_Question`
`Key_At`
`Key_A`
`Key_B`
`Key_C`
`Key_D`
`Key_E`
`Key_F`
`Key_G`
`Key_H`
`Key_I`
`Key_J`
`Key_K`
`Key_L`
`Key_M`
`Key_N`
`Key_O`
`Key_P`
`Key_Q`
`Key_R`
`Key_S`
`Key_T`
`Key_U`
`Key_V`
`Key_W`
`Key_X`
`Key_Y`
`Key_Z`
`Key_BracketLeft`
`Key_Backslash`
`Key_BracketRight`
`Key_AsciiCircum`
`Key_Underscore`
`Key_QuoteLeft`
`Key_BraceLeft`
`Key_Bar`
`Key_BraceRight`
`Key_AsciiTilde`
`Key_nobreakspace`
`Key_exclamdown`
`Key_cent`
`Key_sterling`
`Key_currency`
`Key_yen`
`Key_brokenbar`
`Key_section`
`Key_diaeresis`
`Key_copyright`
`Key_ordfeminine`
`Key_guillemotleft`
`Key_notsign`
`Key_hyphen`
`Key_registered`
`Key_macron`
`Key_degree`
`Key_plusminus`
`Key_twosuperior`
`Key_threesuperior`
`Key_acute`
`Key_mu`
`Key_paragraph`
`Key_periodcentered`
`Key_cedilla`
`Key_onesuperior`
`Key_masculine`
`Key_guillemotright`
`Key_onequarter`
`Key_onehalf`
`Key_threequarters`
`Key_questiondown`
`Key_Agrave`
`Key_Aacute`
`Key_Acircumflex`
`Key_Atilde`
`Key_Adiaeresis`
`Key_Aring`
`Key_AE`
`Key_Ccedilla`
`Key_Egrave`
`Key_Eacute`
`Key_Ecircumflex`
`Key_Ediaeresis`
`Key_Igrave`
`Key_Iacute`
`Key_Icircumflex`
`Key_Idiaeresis`
`Key_ETH`
`Key_Ntilde`
`Key_Ograve`
`Key_Oacute`
`Key_Ocircumflex`
`Key_Otilde`
`Key_Odiaeresis`
`Key_multiply`
`Key_Ooblique`
`Key_Ugrave`
`Key_Uacute`
`Key_Ucircumflex`
`Key_Udiaeresis`
`Key_Yacute`
`Key_THORN`
`Key_ssharp`
`Key_division`
`Key_ydiaeresis`
`Key_Multi_key`
`Key_Codeinput`
`Key_SingleCandidate`
`Key_MultipleCandidate`
`Key_PreviousCandidate`
`Key_Mode_switch`
`Key_Kanji`
`Key_Muhenkan`
`Key_Henkan`
`Key_Romaji`
`Key_Hiragana`
`Key_Katakana`
`Key_Hiragana_Katakana`
`Key_Zenkaku`
`Key_Hankaku`
`Key_Zenkaku_Hankaku`
`Key_Touroku`
`Key_Massyo`
`Key_Kana_Lock`
`Key_Kana_Shift`
`Key_Eisu_Shift`
`Key_Eisu_toggle`
`Key_Hangul`
`Key_Hangul_Start`
`Key_Hangul_End`
`Key_Hangul_Hanja`
`Key_Hangul_Jamo`
`Key_Hangul_Romaja`
`Key_Hangul_Jeonja`
`Key_Hangul_Banja`
`Key_Hangul_PreHanja`
`Key_Hangul_PostHanja`
`Key_Hangul_Special`
`Key_Dead_Grave`
`Key_Dead_Acute`
`Key_Dead_Circumflex`
`Key_Dead_Tilde`
`Key_Dead_Macron`
`Key_Dead_Breve`
`Key_Dead_Abovedot`
`Key_Dead_Diaeresis`
`Key_Dead_Abovering`
`Key_Dead_Doubleacute`
`Key_Dead_Caron`
`Key_Dead_Cedilla`
`Key_Dead_Ogonek`
`Key_Dead_Iota`
`Key_Dead_Voiced_Sound`
`Key_Dead_Semivoiced_Sound`
`Key_Dead_Belowdot`
`Key_Dead_Hook`
`Key_Dead_Horn`
`Key_Dead_Stroke`
`Key_Dead_Abovecomma`
`Key_Dead_Abovereversedcomma`
`Key_Dead_Doublegrave`
`Key_Dead_Belowring`
`Key_Dead_Belowmacron`
`Key_Dead_Belowcircumflex`
`Key_Dead_Belowtilde`
`Key_Dead_Belowbreve`
`Key_Dead_Belowdiaeresis`
`Key_Dead_Invertedbreve`
`Key_Dead_Belowcomma`
`Key_Dead_Currency`
`Key_Dead_a`
`Key_Dead_A`
`Key_Dead_e`
`Key_Dead_E`
`Key_Dead_i`
`Key_Dead_I`
`Key_Dead_o`
`Key_Dead_O`
`Key_Dead_u`
`Key_Dead_U`
`Key_Dead_Small_Schwa`
`Key_Dead_Capital_Schwa`
`Key_Dead_Greek`
`Key_Dead_Lowline`
`Key_Dead_Aboveverticalline`
`Key_Dead_Belowverticalline`
`Key_Dead_Longsolidusoverlay`
`Key_Back`
`Key_Forward`
`Key_Stop`
`Key_Refresh`
`Key_VolumeDown`
`Key_VolumeMute`
`Key_VolumeUp`
`Key_BassBoost`
`Key_BassUp`
`Key_BassDown`
`Key_TrebleUp`
`Key_TrebleDown`
`Key_MediaPlay`	A key setting the state of the media player to play
`Key_MediaStop`	A key setting the state of the media player to stop
`Key_MediaPrevious`
`Key_MediaNext`
`Key_MediaRecord`
`Key_MediaPause`	A key setting the state of the media player to pause (Note: not the pause/break key)
`Key_MediaTogglePlayPause`	A key to toggle the play/pause state in the media player (rather than setting an absolute state)
`Key_HomePage`
`Key_Favorites`
`Key_Search`
`Key_Standby`
`Key_OpenUrl`
`Key_LaunchMail`
`Key_LaunchMedia`
`Key_Launch0`	On X11 this key is mapped to "My Computer" (XF86XK_MyComputer) key for legacy reasons.
`Key_Launch1`	On X11 this key is mapped to "Calculator" (XF86XK_Calculator) key for legacy reasons.
`Key_Launch2`	On X11 this key is mapped to XF86XK_Launch0 key for legacy reasons.
`Key_Launch3`	On X11 this key is mapped to XF86XK_Launch1 key for legacy reasons.
`Key_Launch4`	On X11 this key is mapped to XF86XK_Launch2 key for legacy reasons.
`Key_Launch5`	On X11 this key is mapped to XF86XK_Launch3 key for legacy reasons.
`Key_Launch6`	On X11 this key is mapped to XF86XK_Launch4 key for legacy reasons.
`Key_Launch7`	On X11 this key is mapped to XF86XK_Launch5 key for legacy reasons.
`Key_Launch8`	On X11 this key is mapped to XF86XK_Launch6 key for legacy reasons.
`Key_Launch9`	On X11 this key is mapped to XF86XK_Launch7 key for legacy reasons.
`Key_LaunchA`	On X11 this key is mapped to XF86XK_Launch8 key for legacy reasons.
`Key_LaunchB`	On X11 this key is mapped to XF86XK_Launch9 key for legacy reasons.
`Key_LaunchC`	On X11 this key is mapped to XF86XK_LaunchA key for legacy reasons.
`Key_LaunchD`	On X11 this key is mapped to XF86XK_LaunchB key for legacy reasons.
`Key_LaunchE`	On X11 this key is mapped to XF86XK_LaunchC key for legacy reasons.
`Key_LaunchF`	On X11 this key is mapped to XF86XK_LaunchD key for legacy reasons.
`Key_LaunchG`	On X11 this key is mapped to XF86XK_LaunchE key for legacy reasons.
`Key_LaunchH`	On X11 this key is mapped to XF86XK_LaunchF key for legacy reasons.
`Key_MonBrightnessUp`
`Key_MonBrightnessDown`
`Key_KeyboardLightOnOff`
`Key_KeyboardBrightnessUp`
`Key_KeyboardBrightnessDown`
`Key_PowerOff`
`Key_WakeUp`
`Key_Eject`
`Key_ScreenSaver`
`Key_WWW`
`Key_Memo`
`Key_LightBulb`
`Key_Shop`
`Key_History`
`Key_AddFavorite`
`Key_HotLinks`
`Key_BrightnessAdjust`
`Key_Finance`
`Key_Community`
`Key_AudioRewind`
`Key_BackForward`
`Key_ApplicationLeft`
`Key_ApplicationRight`
`Key_Book`
`Key_CD`
`Key_Calculator`	On X11 this key is not mapped for legacy reasons. Use Qt::Key_Launch1 instead.
`Key_ToDoList`
`Key_ClearGrab`
`Key_Close`
`Key_Copy`
`Key_Cut`
`Key_Display`
`Key_DOS`
`Key_Documents`
`Key_Excel`
`Key_Explorer`
`Key_Game`
`Key_Go`
`Key_iTouch`
`Key_LogOff`
`Key_Market`
`Key_Meeting`
`Key_MenuKB`
`Key_MenuPB`
`Key_MySites`
`Key_News`
`Key_OfficeHome`
`Key_Option`
`Key_Paste`
`Key_Phone`
`Key_Calendar`
`Key_Reply`
`Key_Reload`
`Key_RotateWindows`
`Key_RotationPB`
`Key_RotationKB`
`Key_Save`
`Key_Send`
`Key_Spell`
`Key_SplitScreen`
`Key_Support`
`Key_TaskPane`
`Key_Terminal`
`Key_Tools`
`Key_Travel`
`Key_Video`
`Key_Word`
`Key_Xfer`
`Key_ZoomIn`
`Key_ZoomOut`
`Key_Away`
`Key_Messenger`
`Key_WebCam`
`Key_MailForward`
`Key_Pictures`
`Key_Music`
`Key_Battery`
`Key_Bluetooth`
`Key_WLAN`
`Key_UWB`
`Key_AudioForward`
`Key_AudioRepeat`
`Key_AudioRandomPlay`
`Key_Subtitle`
`Key_AudioCycleTrack`
`Key_Time`
`Key_Hibernate`
`Key_View`
`Key_TopMenu`
`Key_PowerDown`
`Key_Suspend`
`Key_ContrastAdjust`
`Key_TouchpadToggle`
`Key_TouchpadOn`
`Key_TouchpadOff`
`Key_MicMute`
`Key_Red`
`Key_Green`
`Key_Yellow`
`Key_Blue`
`Key_ChannelUp`
`Key_ChannelDown`
`Key_Guide`
`Key_Info`
`Key_Settings`
`Key_MicVolumeUp`
`Key_MicVolumeDown`
`Key_New`
`Key_Open`
`Key_Find`
`Key_Undo`
`Key_Redo`
`Key_MediaLast`
`Key_unknown`
`Key_Call`	A key to answer or initiate a call (see Qt::Key_ToggleCallHangup for a key to toggle current call state)
`Key_Camera`	A key to activate the camera shutter. On Windows Runtime, the environment variable QT_QPA_ENABLE_CAMERA_KEYS must be set to receive the event.
`Key_CameraFocus`	A key to focus the camera. On Windows Runtime, the environment variable QT_QPA_ENABLE_CAMERA_KEYS must be set to receive the event.
`Key_Context1`
`Key_Context2`
`Key_Context3`
`Key_Context4`
`Key_Flip`
`Key_Hangup`	A key to end an ongoing call (see Qt::Key_ToggleCallHangup for a key to toggle current call state)
`Key_No`
`Key_Select`
`Key_Yes`
`Key_ToggleCallHangup`	A key to toggle the current call state (ie. either answer, or hangup) depending on current call state
`Key_VoiceDial`
`Key_LastNumberRedial`
`Key_Execute`
`Key_Printer`
`Key_Play`
`Key_Sleep`
`Key_Zoom`
`Key_Exit`
`Key_Cancel`

Orientation : enumeration

This type is used to signify an object's orientation.

Constant	Value
`Horizontal`
`Vertical`

[since Qt Quick Ultralite 1.1] uiLanguage : string

The uiLanguage holds the name of the language to be used for user interface string translations.

You can set the value freely and use it in bindings. By convention, an empty string means no translation from the language used in the source code is intended to occur.

This property was introduced in Qt Quick Ultralite 1.1.

Method Documentation

[since Qt Quick Ultralite 1.9] font font(object fontConfiguration)

Returns a font with the properties specified in the fontConfiguration object. The fontConfiguration object must contain key-value pairs where valid keys are the font's subproperty names, and the values are valid values for each subproperty.

Calling Qt.font() on a readonly property enables the qmltocpp tool to emit optimized C++ code. This optimization currently is applied for constant font configurations only. In the following example, the optimized code removes the unnecessary bindings on the first three Text items:

function someConditon() : bool { return false }

readonly property font fontConfig1: Qt.font({ pixelSize: 40, italic: true })
readonly property font fontConfig2: Qt.font({ pixelSize: 24 })

Column {
    Text {
        font: fontConfig1
        text: "dog"
    }

    Text {
        font: fontConfig1
        text: "cat"
    }

    Text {
        font: fontConfig2
        text: "mole"
    }

    Text {
        font: someConditon() ? fontConfig1 : fontConfig2
        text: "hedgehog"
    }
}

This method was introduced in Qt Quick Ultralite 1.9.

[since Qt Quick Ultralite 1.7] matrix4x4 matrix4x4(real m11, real m12, real m13, real m14, real m21, real m22, real m23, real m24, real m31, real m32, real m33, real m34, real m41, real m42, real m43, real m44)

Returns a matrix4x4 with the specified values.

The arguments correspond to their positions in the matrix:

m11	m12	m13	m14
m21	m22	m23	m24
m31	m32	m33	m34
m41	m42	m43	m44

This method was introduced in Qt Quick Ultralite 1.7.

[since Qt Quick Ultralite 2.0] string resolvedUrl(String url)

Identity function for syntactical compatibility with Qt6 QML. Returns the passed-in string url unchanged.

This method was introduced in Qt Quick Ultralite 2.0.

color rgba(real red, real green, real blue, real alpha)

Returns a color with the specified red, green, blue, and alpha components. All components should be in the range 0-1 (inclusive).

Available under certain Qt licenses.
Find out more.