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QML

QML

QML, aka Qt Modeling Language, is a pl created in 2009.

#210on PLDB 13Years Old 1.1kUsers
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QML (Qt Modeling Language) is a user interface markup language. It is a declarative language (similar to CSS and JSON) for designing user interface–centric applications. Inline JavaScript code handles imperative aspects. Read more on Wikipedia...


Example from the web:
Item { Rectangle { id: myRect width: 120 height: 100 } Rectangle { width: myRect.width height: 200 } }
Example from Linguist:
/**************************************************************************** ** ** Copyright (C) 2015 The Qt Company Ltd. ** Contact: http://www.qt.io/licensing ** ** This file is part of the Qt Build Suite. ** ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms and ** conditions see http://www.qt.io/terms-conditions. For further information ** use the contact form at http://www.qt.io/contact-us. ** ** GNU Lesser General Public License Usage ** Alternatively, this file may be used under the terms of the GNU Lesser ** General Public License version 2.1 or version 3 as published by the Free ** Software Foundation and appearing in the file LICENSE.LGPLv21 and ** LICENSE.LGPLv3 included in the packaging of this file. Please review the ** following information to ensure the GNU Lesser General Public License ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. ** ** In addition, as a special exception, The Qt Company gives you certain additional ** rights. These rights are described in The Qt Company LGPL Exception ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. ** ****************************************************************************/ import qbs 1.0 import qbs.FileInfo import qbs.ModUtils Module { property string buildVariant: "debug" property bool enableDebugCode: buildVariant == "debug" property bool debugInformation: (buildVariant == "debug") property string optimization: (buildVariant == "debug" ? "none" : "fast") readonly property stringList hostOS: undefined // set internally property string hostOSVersion: { if (hostOS && hostOS.contains("osx")) { return getNativeSetting("/System/Library/CoreServices/ServerVersion.plist", "ProductVersion") || getNativeSetting("/System/Library/CoreServices/SystemVersion.plist", "ProductVersion"); } else if (hostOS && hostOS.contains("windows")) { var version = getNativeSetting("HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Windows NT\\CurrentVersion", "CurrentVersion"); return version + "." + hostOSBuildVersion; } } property string hostOSBuildVersion: { if (hostOS.contains("osx")) { return getNativeSetting("/System/Library/CoreServices/ServerVersion.plist", "ProductBuildVersion") || getNativeSetting("/System/Library/CoreServices/SystemVersion.plist", "ProductBuildVersion"); } else if (hostOS.contains("windows")) { return getNativeSetting("HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Windows NT\\CurrentVersion", "CurrentBuildNumber"); } } readonly property var hostOSVersionParts: hostOSVersion ? hostOSVersion.split('.').map(function(item) { return parseInt(item, 10); }) : [] readonly property int hostOSVersionMajor: hostOSVersionParts[0] || 0 readonly property int hostOSVersionMinor: hostOSVersionParts[1] || 0 readonly property int hostOSVersionPatch: hostOSVersionParts[2] || 0 property stringList targetOS: hostOS property string pathListSeparator: hostOS.contains("windows") ? ";" : ":" property string pathSeparator: hostOS.contains("windows") ? "\\" : "/" property string profile property stringList toolchain property string architecture property bool install: false property string installSourceBase readonly property string installRoot: undefined property string installDir property string installPrefix: "" property path sysroot PropertyOptions { name: "buildVariant" allowedValues: ['debug', 'release'] description: "name of the build variant" } PropertyOptions { name: "optimization" allowedValues: ['none', 'fast', 'small'] description: "optimization level" } validate: { var validator = new ModUtils.PropertyValidator("qbs"); validator.setRequiredProperty("architecture", architecture, "you might want to re-run 'qbs-setup-toolchains'"); validator.setRequiredProperty("hostOS", hostOS); validator.setRequiredProperty("targetOS", targetOS); if (hostOS && (hostOS.contains("windows") || hostOS.contains("osx"))) { validator.setRequiredProperty("hostOSVersion", hostOSVersion, "could not detect host operating system version; " + "verify that system files and registry keys have not " + "been modified."); if (hostOSVersion) validator.addVersionValidator("hostOSVersion", hostOSVersion, 2, 4); validator.setRequiredProperty("hostOSBuildVersion", hostOSBuildVersion, "could not detect host operating system build version; " + "verify that system files or registry have not been " + "tampered with."); } validator.addCustomValidator("architecture", architecture, function (value) { return architecture === canonicalArchitecture(architecture); }, "'" + architecture + "' is invalid. You must use the canonical name '" + canonicalArchitecture(architecture) + "'"); validator.validate(); } // private properties property var commonRunEnvironment: { var env = {}; if (targetOS.contains("windows")) { env["PATH"] = [ FileInfo.joinPaths(installRoot, installPrefix) ]; } else if (hostOS.contains("darwin") && targetOS.contains("darwin")) { env["DYLD_FRAMEWORK_PATH"] = [ FileInfo.joinPaths(installRoot, installPrefix, "Library", "Frameworks"), FileInfo.joinPaths(installRoot, installPrefix, "lib"), FileInfo.joinPaths(installRoot, installPrefix) ].join(pathListSeparator); env["DYLD_LIBRARY_PATH"] = [ FileInfo.joinPaths(installRoot, installPrefix, "lib"), FileInfo.joinPaths(installRoot, installPrefix, "Library", "Frameworks"), FileInfo.joinPaths(installRoot, installPrefix) ].join(pathListSeparator); if (targetOS.contains("ios-simulator") && sysroot) { env["DYLD_ROOT_PATH"] = [sysroot]; } } else if (hostOS.contains("unix") && targetOS.contains("unix")) { env["LD_LIBRARY_PATH"] = [ FileInfo.joinPaths(installRoot, installPrefix, "lib") ]; } return env; } // internal properties readonly property string version: [versionMajor, versionMinor, versionPatch].join(".") readonly property int versionMajor: undefined // set internally readonly property int versionMinor: undefined // set internally readonly property int versionPatch: undefined // set internally }
Example from Wikipedia:
MouseArea { onPressed: console.log("mouse button pressed") }

Language features

Feature Supported Example Token
Integers
// [0-9]+
Floats
// [0-9][0-9]*\.[0-9]+([eE][0-9]+)?[fd]?
Hexadecimals
// 0x[0-9a-fA-F]+
MultiLine Comments
/* A comment
*/
/* */
Comments
// A comment
Line Comments
// A comment
//
Semantic Indentation ϴ
nextflow.html · qml.html · ibm-rpg.html

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