The Ceremony of the Flags was created over 50 years ago,. I can't cast back to Qt::Orientation. If yours has that name, you can use this macro. Equivalent to Q_DECLARE_METATYPE(TYPE *) and Q_DECLARE_METATYPE(QQmlListProperty<TYPE>) QML_DECLARE_TYPEINFO (Type, Flags) Declares additional properties of the given Type as described by the specified Flags. The Q_DECLARE_FLAGS() macro expands to. Q&A for work. The QFlags<Enum> class is a template class, where Enum is an enum type. enum TextShapingFlag { RightToLeft = 0x0001, ReturnDesignMetrics = 0x0002 }; Q_DECLARE_FLAGS(TextShapingFlags, TextShapingFlag) virtual Capabilities capabilities() const = 0; virtual QVariant fontProperty(FontProperty property) const = 0; virtual bool convertStringToGlyphIndices(const QChar *string, int length, uint *glyphs, int. When a QSignalSpy picks it up, the QVariant for the orientation field is an invalid one. The traditional C++ approach for storing OR-combinations of enum values is to use an int or uint variable. QML_DECLARE_TYPE. The enum needs to. You use it much like you use a simple integer except that it enforces type safety. I'm unit testing a function for a table model, where it emits 'headerDataChanged'. Q_DECLARE_FLAGS(Flags, Enum)宏将普通结构体Enum重新定义成了一个可以自由进行与或非操作的安全的结构体Flags。Q_DECLARE_FLAG出现在Enum定义之后，且定义之后Enum和Flags是同时存在的； Q_DECLARE_OPERATORS_FOR_FLAGS(Flags)赋予了Flags一个全局操作符“|”，没. 传统的 C++ 编程中，通常使用整数来保存 enum 的逻辑运算结果 (与、或、非、异或等)，在进行逻辑运算的时候没有进行 类型. 10 and then gone in 5. Thanks very much for your reply. With that we can now construct the Q_ENUM macro: #define Q_ENUM (ENUM) . setFlag. 传统的 C++ 编程中，通常使用整数来保存 enum 的逻辑运算结果 (与、或、非、异或等)，在进行逻辑运算的时候没有进行类型检查，一个枚举类型可以和其他的枚举类型进行逻辑运算，运算的结果可以直接传递给接收参数为整数的函数。 Qt 中，模板类 QFlags<Enum> 提供了类型安全的方式保存 enum 的逻辑. Export. The class ColorPickerStyle needs the Q_OBJECT macro as well so that the meta object compiler works correctly. In the header file the flags are declared like this Q_DECLARE_FLAGS (WindowFlags, WindowType) More about this macro: Q_DECLARE_FLAGS. It also handles the application's initialization and finalization, as well as system-wide and application-wide settings. Do I have to locally declare orientation as a metatype?Detailed Description. Before Qt 6. Configuration is required. 目录 1. png stSingleData Q_DECLARE_FLAGS(Flags, Enum)宏将普通结构体Enum重新定义成了一个可以自由进行与或非操作的安全的结构体Flags。Q_DECLARE_FLAG出现在Enum定义之后，且定义之后Enum和Flags是同时存在的； Q_DECLARE_OPERATORS_FOR_FLAGS(Flags)赋予了Flags一个全局操作符“|”，没有这个宏语句，Flags量. The inconvenience with this approach is that there's no type checking at all; any enum value can. The Q_DECLARE_PRIVATE macro must be put in the private section of the class's declaration. enum TextShapingFlag { RightToLeft = 0x0001, ReturnDesignMetrics = 0x0002 }; Q_DECLARE_FLAGS(TextShapingFlags, TextShapingFlag) virtual Capabilities capabilities() const = 0; virtual QVariant fontProperty(FontProperty property) const = 0; virtual bool convertStringToGlyphIndices(const QChar *string, int length, uint *glyphs, int. Q_DECLARE_OPERATORS_FOR_FLAGS that was fixed in 5. 15. The inconvenience with this approach is that there's no type checking at all; any enum value can. But I cannot make doxygen generate anything for Options . QFlags is used. Q_DECLARE_FLAGS(Flags, Enum) Q_DECLARE_FLAGS() マクロは次のように展開されます。 typedef QFlags<Enum> Flags; Enum は既存の列挙型の名前ですが、 Flags QFlags の名前です < Enum > typedef. typedef QFlags<Enum> Flags; Enum is the name of an existing enum type, whereas Flags is the name of the QFlags<Enum> typedef. The class is used as a helper to marshall types in QVariant and in queued signals and slots connections. The declaration of the flags type is done using the Q_DECLARE_FLAGS() macro. 1 声明使用 2. png stNone"," \\image html selectiontype-whole. h: #ifndef Q_MOC_RUN namespace #else class Q_CORE_EXPORT #endif Qt {. It declares two inline implementations of the d_func() helper method. setFlag(Yes, true); bool a = flag. [static] template <typename T> QMetaEnum QMetaEnum:: fromType Returns the QMetaEnum corresponding to the type in the template parameter. Public Types Public Functions Macros Q_DECLARE_FLAGS ( Flags, Enum) Q_DECLARE_OPERATORS_FOR_FLAGS ( Flags) Detailed Description The QFlags class provides a type-safe way of storing OR-combinations of enum values. The Q_DECLARE_FLAGS () macro does not expose the flags to the meta-object system, so they cannot be used by Qt Script. The macro must be placed after the enum declaration. The traditional C++ approach for storing OR-combinations of enum values is to use an int or uint. To correct this, you must enable the namespace to participate in the Qt MetaObject system [1]. What Others Say About This Business: User (18/10/2018 03:52) Let’s help British Columbia Cadets hit 3K likes today! User (31/08/2018 23:08) 2018 Ceremony of the Flags -. 简述 2. To be able to pass all others types that do not derive from QObject within a QVariant to qml, use qRegisterMetaType<T>. On a 64-bit machine in particular, but even on a 32-bit machine, you'd save space by using char name[12]; in place of a pointer. pro","contentType":"file"},{"name":"debug. #ifndef SETTINGS_H #define SETTINGS_H #include <QObject> class Settings : public QObject { Q_OBJECT public: enum GestureType { Unknown, Left,. main. The declaration of the flags type is done using the Q_DECLARE_FLAGS() macro. For example, for your string reversal and stripping I. QFlags enforces that enum values can only be combined with. All reactionsNeat. Add x11extras to the . Fix Version/s: None Affects Version/s: None Component/s: Core: I/O. png stNone"," \\image html selectiontype-whole. QCoreApplication contains the main event loop, where all events from the operating system (e. " Q_STATIC_ASSERT_X ( (std:: is_enum <Enum>::value), "QFlags is only usable on enumeration types. 1. First what does Q_DECLARE_FLAGS do? From the Qt documentation, this macro expands to, in this case:. Up to Qt 6. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":". typedef QFlags<Enum> Flags; 1. The issue seems to be with the Q_DECLARE_OPERATORS_FOR_FLAGS declaration; if I remove it, the compilation issues with other flag types are resolved, but. Thus if you get a 3 you know it both HasClaws( = 1) and CanFly(= 2). It creates the d_func() function for you, using the variable called d_ptr. This function was introduced in Qt 5. Previously registered TypeFlags(0x7), now registering TypeFlags(0x107). Up to Qt 6. 15. The method str. QFlags is used throughout Qt for storing combinations of enum values. 1. The given link is Registering C++ Types with the QML Type System. See also isValid() and name(). First post . But some changes were inevitable in an effort to make Qt a better framework. ignoredirectives variables, non-standard constructs (typically macros) can result in erroneous documentation. /** ** ** Copyright (C) 2015 The Qt Company Ltd. The QFlags<Enum> class is a template class, where Enum is an enum type. [static] bool QCoreApplication:: installTranslator (QTranslator *translationFile) Adds the translation file translationFile to the list of. 詳細については、 QFlags のマニュアルを参照してください。 Q_DECLARE_OPERATORS_FOR_FLAGS も参照して. Teams. Detailed Description. I just tried to rewrite MyClass here it is: #include <QFlags> class MyClass { public: enum MyFlag { Yes, // default No }; Q_DECLARE_FLAGS(MyFlags, MyFlag) MyClass(){ flag. friend constexpr const. This uses the staticMetaObject of the class (as declared in the Q_OBJECT macro). txt","path. Details. To refer to a name declared inside this Qt namespace (such as LeftDockWidgetArea ), you precede it with Qt::. The traditional C++ approach for storing OR-combinations of enum values is to use an int or uint variable. @mrjj thank, now I understood but the problem is in this way they also don't work. Teams. One way you can check the validity of the initial value is to convert the returned keys back to value using QMetaEnum::keysToValue (). Code snippets and open source (free software) repositories are indexed and searchable. setFlag(Yes, false); bool b = flag. Go to my next postThis question lacks the necessary detail. testFlag(Yes); // b == true flag. The traditional C++ approach for storing OR-combinations of enum values is to use an int or uint variable. If instead you just assign the values 1 through 4 straight through and you get a 3, it might be a single EatsFish, or again a combination of HasClaws and CanFly. The Q_DECLARE_PRIVATE Macro. What is the d-pointer. You can't register enums as a type of qml. Poppler::Document::okToChange. #define. If you want to use QFlags for your own enum types, use the Q_DECLARE_FLAGS () and Q_DECLARE_OPERATORS_FOR_FLAGS (). png stSingleData Q_DECLARE_OPERATORS_FOR_FLAGS () 技术标签： Qt qt. To make the flags available for these purposes, the Q_FLAGS() macro must be. If you need to cast integer values to flags in a untyped fashion, you can use the explicit QFlags constructor as cast operator. Q_DECLARE_FLAGS 宏用于声明一个标志类型（flags type），它基于已定义的枚举类型。标志类型是一种可以存储枚举类型值的组合（通过按位或操作组合）的类型。这允许您在一个变量中存储多个枚举值，并在需要时检查这些值的存在。 例子}; Q_DECLARE_OPERATORS_FOR_FLAGS(Executable::Flags) QT creator highlights the Q_DECLARE_OPERATORS_FOR_FLAGS line with a yellow triangle on the left, a lightbulb on the right and a very thin almost invisible reddish line beneath. In the case of 16 (0b 0001 0000), an empty byte array is returned. It associates a type name to a type so that it can be created and destructed dynamically at run-time. \\image html selectiontype-none. I have some flags defined as follows, using a scoped enum: enum class Capability : int { NoCapabilities = 0, SomethingCool = 1, UberCool = 1 << 1, EvenCooler = 1 << 2, }; Q_DECLARE_FLAGS( Capabilities, Capability ) Now, I am trying to use the equality operator: Capabilities(DataCapability::NoCapabilities) == Capability::NoCapabilities Q_DECLARE_PRIVATE. The first is the installation directory for. Q_DECLARE_TYPEINFO (Type, Flags) You can use this macro to specify information about a custom type Type. namespace Qt {. Qt 6 is a result of the conscious effort to make the framework more efficient and easy to use. h: #ifndef Q_MOC_RUN namespace #else class Q_CORE_EXPORT #endif Qt {. 6. testFlag(Yes); // a == true flag. To start viewing messages, select the forum that you want to visit from the selection below. 12. 12 so that makes sense if you had it in 5. q_enum用法 2. The formal way to describe them is by writing a series of Q_ASSERTs: one for the value of data on the original model, and one each for the item(s) synthesized by the proxy. The QFlags<E> class is a template class, where E is an enum type. ** Contact: ** ** This file is part of the QtSerialBus module of the Qt Toolkit. Alot of methods have a QFlags Qt Class as a parameter. The qmlRegisterType<T> () function is only for classes that are derived from QObject. 1. The namespace does not have a static QMetaObject to which the Qt MetaObject system can relate the enumeration. Welcome to Her Majestie's Canadian Ship Quadra's 2018 presentation of the Ceremony of the Flags. fgrep -l -f /var/tmp/foo johannes brahms. #include <QtCore>. This is used by QGraphicsAnchorLayout. It's usually the case that you can find a class which it makes sense to "own" constants. gitignore","path. If you want to use QFlags for your own enum types, use the Q_DECLARE_FLAGS () and Q_DECLARE_OPERATORS_FOR_FLAGS (). You may have to register before you can post: click the register link above to proceed. With accurate type information, Qt's generic containers can choose appropriate storage methods and algorithms. " QT_DEPRECATED_SINCE. 简述 2. Most of these have moved, at Qt 6. This function was introduced in Qt 6. png stWhole"," \\image html selectiontype-singledata. . The inconvenience with this approach is that there's no type checking at all; any enum value can. This is for Qt 5. Q_DECLARE_FLAGS (ProjectReadFlags, ProjectReadFlag) SIP_MONKEYPATCH_FLAGS_UNNEST(QgsProject Project load flags. Changes to Qt Core. 5, <QtGlobal> defined an assortment of global declarations. Q_DECLARE_FLAGS (Flags, Enum)宏展开为：. Enumeration Type documentation) Providing the Message class has been registered with the QML type system. For example, if we execute the ls -l command, the -l part of the command is a flag that we are passing as. 2 用法示例 1. To get access to enum on QML side, you have to register it (cf. QDir is missing Q_FLAGS call for the property "Filters" Log In. everything that has to be there is already present and this patch provides exact same functionality as original version - that was working before 6. Connect and share knowledge within a single location that is structured and easy to search. If the returned value from QMetaEnum::keysToValue () is equal to the initial value, the initial value should be valid. cpp This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. One of the fields in this signal is a 'Qt::Orientation' flag. The QFlags<Enum> class is a template class, where Enum is an enum type. Q-Pointers 点击查看代码 class Widget : public QWidget { Q_OBJECT public: enum languageType { inValidValue=0x0,//无效值（调用testFlag()时这个值是无效的，除0. This uses the staticMetaObject of the class (as declared in the Q_OBJECT macro). Current the only supported type info is QML_HAS_ATTACHED_PROPERTIES which declares that the Type supports attached. 1 Answer. 1代码 3. QMetaType::construct (), QMetaType::sizeOf (), and QMetaType::alignOf. 简述 数据库里用到了枚举的存储，比如一个设备有两个状态，保持数据库和代码的可读性，当然是用枚举了，那就需要把枚举转成字符串存储进去，读的时候再转回来。 Qt Base (Core, Gui, Widgets, Network,. Public Types Public Functions Macros Q_DECLARE_FLAGS ( Flags, Enum) Q_DECLARE_OPERATORS_FOR_FLAGS ( Flags) Detailed Description The QFlags. . I have a class Login which inherits from. 简述 数据库里用到了枚举的存储，比如一个设备有两个状态，保持数据库和代码的可读性，当然是用枚举了，那就需要把枚举转成字符串存储进去，读的时候再转. If not specified by the Cpp. github","path":". You will find this (or something similar) in srccorelibglobalqnamespace. QMetaType::registerType: Binary compatibility break -- Type flags for type 'QList<QSslError>' [1062] don't match. 目录 1. /** ** ** Copyright (C) 2015 The Qt Company Ltd. Q_DECLARE_OPERATORS_FOR_FLAGS(Flags)赋予了Flags一个全局操作符“|”，. github","contentType":"directory"},{"name":". [quote author="Volker" date="1327669643"]You should define your enums only at one place and just use it in the other one. It is typically used in a class definition to declare that values of a given enum can be used as flags and combined using the bitwise OR operator. Recently cppcheck started failing for G-P, e. Equivalent to Q_DECLARE_METATYPE(TYPE *) and Q_DECLARE_METATYPE(QQmlListProperty<TYPE>) QML_DECLARE_TYPEINFO (Type, Flags) Declares additional properties of the given Type as described by the specified Flags. The Q_DECLARE_FLAGS() macro does not expose the flags to the meta-object system, so they cannot be used by Qt Script or edited in Qt Designer. Q_DECLARE_PRIVATE(QQuickKeysAttached) 846: 847: Q_PROPERTY(bool enabled READ enabled WRITE setEnabled NOTIFY enabledChanged) 848: Q_PROPERTY(QQmlListProperty<QQuickItem> forwardTo READ forwardTo) 849: Q_PROPERTY(Priority priority READ priority WRITE setPriority NOTIFY. To make the flags available for these purposes, the Q_FLAG () macro must be used: 如果需要使用Qt容器，那么使用Q_DECLARE_TYPEINFO让Qt了解容器内元素的类型特征是一个不错的做法。因为Qt可以通过识别Q_DECLARE_TYPEINFO给定的类型特征，在容器中采用不同的算法和内存模型以达到计算速度和内存使用上的优化。 Q_DECLARE_TYPEINFO(Type, Flags)的使用非常简单，在定义了数据结构之后，通过指定. You may have to register before you can post: click the register link above to proceed. 0 or (at your option) the GNU General** Public license version 3 or any later version approved by the KDE Free** Qt Foundation. Generated while processing qtbase/src/printsupport/dialogs/qprintpreviewdialog. To review, open the file in an editor. QFlags<Enum>是一个模板类，其中Enum是枚举类型，QFlags用于存储枚举值的组合。. Detailed Description. h","path":"src/corelib/tools/qalgorithms. Do I have to locally declare orientation as a metatype?The Q_DECLARE_FLAGS() macro does not expose the flags to the meta-object system, so they cannot be used by Qt Script or edited in Qt Designer. The flag of Victoria with a gold field and red Southern Cross surmounted by St Edward's Crown. pro file: QT += gui x11extras. The flag of Victoria is a British Blue Ensign defaced by the state badge of. const vs. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"TemplateCreator. If it represents a type, it returns QMetaType::Int. Learn more about TeamsIf this is your first visit, be sure to check out the FAQ by clicking the link above. Connect and share knowledge within a single location that is structured and easy to search. Equivalent to Q_DECLARE_METATYPE(TYPE *) and Q_DECLARE_METATYPE(QQmlListProperty<TYPE>) QML_DECLARE_TYPEINFO (Type, Flags) Declares additional properties of the given Type as described by the specified Flags. qdocconf: Cpp. No, QMLThing. The QFlags class provides a type-safe way of storing OR-combinations of enum values. statementmacros: - q_declare_flags - q_declare_metatype - q_declare_operators_for_flags - q_object - q_property - q_unused - qt_require_version Just thinking out loud. namespace Qt {. Qt Code: Switch view. cpp meta-object flags section1 Naming. 'FrameFeature' was not declared in this scope Q_DECLARE_FLAGS(FrameFeatures, FrameFeature) ^. The Alignment type is a typedef for QFlags <AlignmentFlag>. /** ** ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). Bash Script: Flags usage with arguments examples. The traditional C++ approach for storing OR-combinations of enum values is to use an int or uint variable. A regular expression consists of a pattern and optional flags: g, i, m, u, s, y. The issue seems to be with the Q_DECLARE_OPERATORS_FOR_FLAGS declaration; if I remove it, the compilation issues with other flag types are resolved, but since this declares the operators for the flags, then the compiler won't accept the OR'd list. 1 Reply Last reply Reply Quote 1. The Q_DECLARE_OPERATORS_FOR_FLAGS () macro declares global operator| () functions for Flags, which is of type QFlags<T> . ** Contact: ** ** This file is part of the QtSerialBus module of the Qt Toolkit. If this metatype represents an enumeration, this method returns a metatype of a numeric class of the same signedness and size as the enums underlying type. The QFlags<Enum> class is a template class, where Enum is an enum type. As attached in my original post, I use these macro following the code in qgraphicsview. /** ** ** Copyright (C) 2015 The Qt Company Ltd. If your enumeration. ) summary refs log tree commit diff stats If you need to cast integer values to flags in a untyped fashion, you can use the explicit QFlags constructor as cast operator. To start viewing messages, select the forum that you want to visit from the selection below. enum MyFlag {. {"payload":{"allShortcutsEnabled":false,"fileTree":{"src":{"items":[{"name":"modules","path":"src/modules","contentType":"directory"},{"name":"CMakeLists. The default path list consists of one or two entries. The Q_DECLARE_FLAGS () macro. Enumeration Type documentation) Providing the Message class has been registered with the QML type system. Share. The problem is directly related to passing a number in QML into a slot with a QFlags argument. {"payload":{"allShortcutsEnabled":false,"fileTree":{"src/gui/styles":{"items":[{"name":"images","path":"src/gui/styles/images","contentType":"directory"},{"name. Since integers are 32-bit, technically, you can use this to store your 4 boolean values and you have the ability to scale up to 32 boolean values: #ifndef MyClass_H #define MyClass_H #include <QObject> #include <QtQml> #include <QFlags> class MyClass : public QObject { Q_OBJECT Q_PROPERTY. The Q_DECLARE_FLAGS() macro does not expose the flags to the meta-object system, so they cannot be used by Qt Script or edited in Qt Designer. The backtrace leads back to the constructor of QNetworkAccessManager:I'm unit testing a function for a table model, where it emits 'headerDataChanged'. Commandline flags are flags that users specify on the command line when they run an executable. In the command. 1代码 3. For example, document, view, and frame objects must support dynamic creation because the framework needs to create them dynamically. searchcode is a free source code search engine. ** Contact: Nokia Corporation (qt-info@nokia. 如果要为自己的enum类型. 2 用法示例 1. [static] void QCoreApplication:: addLibraryPath (const QString &path) Prepends path to the beginning of the library path list, ensuring that it is searched for libraries first. When Qt doesn't really have a place to put it, it just puts things in the namespace Qt:: Qt Declarative (Quick 2) about summary refs log tree commit diff stats QML_DECLARE_TYPE. If it has another name, maybe you should create a macro to make your code look nicer. : ao_bookmarklist. What do exactly Q_DECLARE_FLAGS function do and what is the replacement of it in c#? What are Flags & QFlag? Would you please convert those codes to c#! c#; c++; \\image html selectiontype-none. " in other words: it is already there. Q_DECLARE_OPERATORS_FOR_FLAGS (QMetaType::TypeFlags) namespace QtMetaTypePrivate {template < typename T, bool Accepted = true > struct QMetaTypeFunctionHelper Q_DECLARE_FLAGS ( Flags, Enum) Q_DECLARE_OPERATORS_FOR_FLAGS ( Flags) Detailed Description The QFlags<Enum> class is a template class, where Enum is an. 1 声明使用 2. cpp Generated on 2023-Nov-10 from project qtbase revision v5. For namespaces use Q_FLAG_NS() instead. typedef QFlags<SimpleFlag> MyFlags; So MyFlags is a particular instantiation of the QFlags class template provided by Qt. h. It is typically used in a class definition to declare that values of a given enum can be used as flags and combined using the bitwise OR operator. h as below: Q_FLAGS(SvBasicDemo::AccessTypes) Q_DECLARE_FLAGS(AccessTypes, AccessType) Q_DECLARE_OPERATORS_FOR_FLAGS(SvBasicDemo::AccessTypes) Is there something wrong in my code? Is there something to do with the namespace? The Cpp. c:93:1: warning: There is an unknown macro here somewhere. 1 or newer. QFlags is used throughout Qt for storing combinations of enum values. For maximum portability, you should always try to use QEvent and QObject::installEventFilter() whenever possible. Q_DECLARE_FLAGS ( Flags, Enum) Q_DECLARE_OPERATORS_FOR_FLAGS ( Flags) Detailed Description The QFlags<Enum> class is a template class, where Enum is an. #include <QDebug>. {"payload":{"allShortcutsEnabled":false,"fileTree":{"src/corelib/tools":{"items":[{"name":"qalgorithms. Declare new types with Q_DECLARE_METATYPE () to make them available to QVariant and other template-based functions. So, let’s see how we can implement the Flags attribute on enumeration: [Flags] public enum UserType { Customer = 1, Driver = 2, Admin = 4, }. There are multiple way to achieve this, depending on Qt Version you are using and build system (qmake or cmake). static Document * load (const QString &filePath, const QByteArray &ownerPassword=QByteArray (), const QByteArray &userPassword=QByteArray ()) Load the document from a file on disk. match(regexp) looks for matches: all of them if there’s g flag, otherwise, only the first one. Flags are the way to go. Q_ENUM宏引入自Qt5. Q_DECLARE_FLAGS (MapSettingsFlags, MapSettingsFlag) SIP_MONKEYPATCH_FLAGS_UNNEST(QgsMapSettings Map settings flags. In qtgui. See also QObject::installEventFilter(). 4. 1086 Q_DECLARE_FLAGS(SelectableParts, SelectablePart) 1087 1088 explicit QCPAxis(QCPAxisRect *parent, AxisType type); 1089 virtual ~QCPAxis(); 1090 1091. tx","path":". QFlags is used throughout Qt for storing combinations of enum values. QFlags is used throughout Qt for storing combinations of enum values. 如果尝试从另一个enum传递一个值或仅传递0以外的普通整数，则编译程序将报告一个错误。. 用模板实现一个字符串枚举互转 3. null. The following table lists the MFC macros that support run-time class information, serialization, and dynamic creation. This article unravels the purpose of these macros. Set the title of the document to. ** All rights reserved. XML Word Printable. See also quit(). Poppler::Document::load. This is a handy macro that hides the ugly stuff for you. 如果需要以非类型化方式将整数值强制转换为标志，则可以将显式QFlags构造程序用作强制转换操作符。. If I am correct Q_ENUMS depends on the QDeclarative mod. -l and -f /var/tmp/foo are the two commandline flags. "QFlags uses an int as storage, so an enum with underlying ". When a QSignalSpy picks it up, the QVariant for the orientation field is an invalid one. g. To get access to enum on QML side, you have to register it (cf. Sorted by: 2. We try to maintain binary and source compatibility for all the public APIs in each release. ignoretokens or Cpp. The QFlags class provides a type-safe way of storing OR-combinations of enum values. Current the only supported type info is QML_HAS_ATTACHED_PROPERTIES. Q&A for work. I can't cast back to Qt::Orientation. See also QGraphicsAnchorLayout. Q_DECLARE_FLAGS ( Flags, Enum ) Q_DECLARE_OPERATORS_FOR_FLAGS ( Flags ) Detailed Description The QFlags class provides a type-safe way of storing OR. pro","path":"TemplateCreator. You will find this (or something similar) in src\corelib\global\qnamespace. 2 测试例子 3. For example: namespace CollectEnums { Q_NAMESPACE enum class CELL_TYPE { Single = 0 , Multi, Nanoliter. They are treated as normal ints. GPL3. A Flags is an attribute that allows us to represent an enum as a collection of values rather than a single value. log (QMLThing. GPL2 and LICENSE. With accurate type information, Qt's generic containers can choose appropriate storage methods and algorithms. enum Qt:: AnchorPoint Specifies a side of a layout item that can be anchored. Learn more about Teams Get early access and see previews of new features. The macro must be placed after the enum declaration. h class Foo : public QObject { Q_OBJECT Q_PROPERTY (fooFlags flags READ flags WRITE setFlags NOTIFY flagsChanged) public: enum Flag { fast = 0x01, far = 0x02, furious = 0x07 };. 传统的 C++ 编程中，通常使用整数来保存 enum 的逻辑运算结果 (与、或、非、异或等)，在进行逻辑运算的时候没有进行 类型. 9-lts-lgpl Powered by. Learn more about Labs. QFlags is used throughout Qt for storing combinations of enum values. The traditional C++ approach for storing OR-combinations of enum values is to use an int or uint variable. 958. The given link is Registering C++ Types with the QML Type System. 传统的 C++ 编程中，通常使用整数来保存 enum 的逻辑运算结果 (与、或、非、异或等)，在进行逻辑运算的时候没有进行类型检查，一个枚举类型可以和其他的枚举类型进行逻辑运算，运算的结果可以直接传递给接收参数为整数的函数。 Qt 中，模板类 QFlags<Enum> 提供了类型安全的方式保存 enum 的逻辑. To make the flags available for these purposes, the Q_FLAG () macro must be used: You can also use QFlags on enums outside classes, and better still, on scoped enums, like so: enum class EMyOption : int { NoOptions = 0x0 , ShowTabs = 0x1 , ShowAll = 0x2 , SqueezeBlank = 0x4 }; Q_DECLARE_FLAGS (MyOptions, EMyOption) Q_DECLARE_OPERATORS_FOR_FLAGS (MyOptions) Q_DECLARE_METATYPE (EMyOption) Q_DECLARE_METATYPE (MyOptions) That's. With that we can now construct the Q_ENUM macro: #define Q_ENUM (ENUM) . The Q_DECLARE_FLAGS() macro does not expose the flags to the meta-object system, so they cannot be used by Qt Script or edited in Qt Designer. enum Qt:: ApplicationAttribute Detailed Description. Forums; Tutoriels; Magazine; FAQs; Blogs; Projets; Chat; Newsletter; Accueil Actualités IT Pro Conception Cycle de vie du logiciel ConceptionStack Overflow | The World’s Largest Online Community for DevelopersIf this is your first visit, be sure to check out the FAQ by clicking the link above. h","contentType":"file. Otherwise it does nothing. ignoretokens variable makes QDoc ignore the specified non-standard constructs, within C++ source code.