{"payload":{"allShortcutsEnabled":false,"fileTree":{"src":{"items":[{"name":"modules","path":"src/modules","contentType":"directory"},{"name":"CMakeLists. I have a class Login which inherits from. 9-lts-lgpl Powered by. This function was introduced in Qt 6. Type: Task Resolution: Unresolved Priority: P3: Somewhat important . 4. 958. For namespaces use Q_FLAG_NS() instead. 0 or (at your option) the GNU General** Public license version 3 or any later version approved by the KDE Free** Qt Foundation. " Q_STATIC_ASSERT_X ( (std:: is_enum <Enum>::value), "QFlags is only usable on enumeration types. Normally we would need to create a instance of this class, pass it to the method and delete it ourselves in the pascal code. The problem is directly related to passing a number in QML into a slot with a QFlags argument. Detailed Description. The QFlags class provides a type-safe way of storing OR-combinations of enum values. The traditional C++ approach for storing OR-combinations of enum values is to use an int or uint. Detailed Description. 5, to separate headers, so that source code can include only what it needs, rather than the whole assortment. AFAIK registering enumus is not required. To refer to a name declared inside this Qt namespace (such as LeftDockWidgetArea ), you precede it with Qt::. , timer and network events) and other sources are processed and dispatched. This uses the staticMetaObject of the class (as declared in the Q_OBJECT macro). enum MyFlag {. 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. QMetaType::construct (), QMetaType::sizeOf (), and QMetaType::alignOf. This is for Qt 5. The declaration of the flags type is done using the Q_DECLARE_FLAGS() macro. 如果要为自己的enum类型. )Non flag enums has the same type and enum names. To make the flags available for these purposes, the Q_FLAGS() macro must be. \\image html selectiontype-none. The traditional C++ approach for storing bitwise-or combinations of enum values is to use an int or uint variable. 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. h","contentType":"file. Most of these have moved, at Qt 6. . 1. There are multiple way to achieve this, depending on Qt Version you are using and build system. ignoretokens = QAXFACTORY_EXPORT \ QM_EXPORT_CANVAS \. It takes the interface class's name as a parameter. 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。. 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. 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. 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 macro must be placed after the enum declaration. The default path list consists of one or two entries. png stWhole"," \\image html selectiontype-singledata. 1086 Q_DECLARE_FLAGS(SelectableParts, SelectablePart) 1087 1088 explicit QCPAxis(QCPAxisRect *parent, AxisType type); 1089 virtual ~QCPAxis(); 1090 1091. 15. Details. setFlag(Yes, true); bool a = flag. h: #ifndef Q_MOC_RUN namespace #else class Q_CORE_EXPORT #endif Qt {. Alternatively, this file may be used under the terms of the GNU** General Public License version 2. 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. I wasn't aware you were using C++11, then in that case, yes, the coma after the last item is valide. 12. The Q_DECLARE_FLAGS() macro expands to. qdocconf: Cpp. When a QSignalSpy picks it up, the QVariant for the orientation field is an invalid one. The class ColorPickerStyle needs the Q_OBJECT macro as well so that the meta object compiler works correctly. 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_D and Q_Q macros are part of a design pattern called the d-pointer (also called the opaque pointer) where the implementation details of a library may be hidden. 1 or newer. 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. Flags are the way to go. One of the fields in this signal is a 'Qt::Orientation' flag. 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. Enumeration Type documentation) Providing the Message class has been registered with the QML type system. Configuration is required. In the command. You will find this (or something similar) in src\corelib\global\qnamespace. Previously registered TypeFlags(0x7), now registering TypeFlags(0x107). enum Qt:: AnchorPoint Specifies a side of a layout item that can be anchored. 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. The QFlags<Enum> class is a template class, where Enum is an enum type. 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 enum type. Q_DECLARE_TYPEINFO (Type, Flags) You can use this macro to specify information about a custom type Type. It stores an OR combination of AlignmentFlag values. png stWhole"," \\image html selectiontype-singledata. match(regexp) looks for matches: all of them if there’s g flag, otherwise, only the first one. QDir is missing Q_FLAGS call for the property "Filters" Log In. The inconvenience with this approach is that there's no type checking at all; any enum value can. @mrjj thank, now I understood but the problem is in this way they also don't work. fgrep -l -f /var/tmp/foo johannes brahms. h","path":"src/corelib/tools/qalgorithms. 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. #define. Most of these. This article unravels the purpose of these macros. const vs. q_enum用法 2. QFlags enforces that enum values can only be combined with. If I am correct Q_ENUMS depends on the QDeclarative mod. A Flags is an attribute that allows us to represent an enum as a collection of values rather than a single value. It's usually the case that you can find a class which it makes sense to "own" constants. g. 15. Q_DECLARE_TYPEINFO (Type, Flags) You can use this macro to specify information about a custom type Type. To get access to enum on QML side, you have to register it (cf. Changes to Qt Core. 5版本，之前版本的Qt请使用Q_ENUMS宏，但Q_ENUMS宏不支持QMetaEnum::fromType()函数(这也是Q_ENUMS被弃用的原因)如果要将QFlags用于自己的枚举类型，请使用Q_DECLARE_FLAGS()和Q_DECLARE_OPERATORS_FOR_FLAGS()。此宏向元对象系统注册枚举类型。Define and Declare a Flags Attribute. 1 Reply Last reply Reply Quote 1. 'FrameFeature' was not declared in this scope Q_DECLARE_FLAGS(FrameFeatures, FrameFeature) ^. That method returns the PIMPL pointer with proper constness. 目录 1. Flags can be one of the following: Q_DECLARE_OPERATORS_FOR_FLAGS(MyClass::Options) const int FontFlagsRole = Qt::UserRole + 1; //or some other offset Then, in your code where you toggle the value, you simply set an instance of this value as a custom data role (using QTableWidgetItem::setData()), and read it back from that role with data(). github","contentType":"directory"},{"name":". /** ** ** Copyright (C) 2015 The Qt Company Ltd. In this topic we summarize those changes in Qt Core, and. 2 测试例子 3. The enum needs to. 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. Q_ENUM宏引入自Qt5. . QFlags is used throughout Qt for storing combinations of enum values. The examples I can see in the Qt Source code seem to include headers rather than using forward declarations, so they're not much help to me. Up to Qt 6. 2. -l and -f /var/tmp/foo are the two commandline flags. The Upper Canada Rebellion flag with two stars and the word "LIBERTY" written on top that most are already familiar with is currently used as the revolutionary. Generated while processing qtbase/src/printsupport/dialogs/qprintpreviewdialog. The Q_DECLARE_FLAGS () macro. Connect and share knowledge within a single location that is structured and easy to search. 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. Q_DECLARE_OPERATORS_FOR_FLAGS(FrameLess::Edges); Raw. We try to maintain binary and source compatibility for all the public APIs in each release. Recently cppcheck started failing for G-P, e. Learn more about Labs. Q_ENUMS(ColorPickerStyleFlag) should be enough. If it represents a type, it returns QMetaType::Int. " QT_DEPRECATED_SINCE. QFlags is used throughout Qt for storing combinations of enum values. QMetaType::registerType: Binary compatibility break -- Type flags for type 'QList<QSslError>' [1062] don't match. This uses the staticMetaObject of the class (as declared in the Q_OBJECT macro). ( johannes and brahms , which don't start with a dash, are commandline arguments . 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. To make the flags available for these purposes, the Q_FLAG() macro must be used: snippet code/src_corelib_global_qglobal. The QFlags<E> class is a template class, where E is an enum type. static Document * load (const QString &filePath, const QByteArray &ownerPassword=QByteArray (), const QByteArray &userPassword=QByteArray ()) Load the document from a file on disk. /** ** ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). In the header file the flags are declared like this Q_DECLARE_FLAGS (WindowFlags, WindowType) More about this macro: Q_DECLARE_FLAGS. 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. 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. 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. Q_DECLARE_OPERATORS_FOR_FLAGS(Flags) Detailed Description. 5, <QtGlobal> defined an assortment of global declarations. Q&A for work. The traditional C++ approach for storing OR-combinations of enum values is to use an int or uint variable. [static] bool QCoreApplication:: installTranslator (QTranslator *translationFile) Adds the translation file translationFile to the list of. The class is used as a helper to marshall types in QVariant and in queued signals and slots connections. Q_DECLARE_FLAGS (Flags, Enum)宏展开为：. Take a look at these c++ codes : enum class Flag : int32 { f_unread = (1 << 0), f_out = (1 << 1), f_mentioned = (1 << 4), MAX_FIELD = (1 << 15), };. /** ** ** Copyright (C) 2015 The Qt Company Ltd. To correct this, you must enable the namespace to participate in the Qt MetaObject system [1]. github","path":". See also isValid() and name(). Public Types Public Functions Macros Q_DECLARE_FLAGS ( Flags, Enum) Q_DECLARE_OPERATORS_FOR_FLAGS ( Flags) Detailed Description The QFlags. The QFlags<Enum> class is a template class, where Enum is an enum type. Poppler::Document::okToChange. Q_DECLARE_FLAGS (Flags, Enum)宏展开为：. The traditional C++ approach for storing OR-combinations of enum values is to use an int or uint variable. 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. Current the only supported type info is QML_HAS_ATTACHED_PROPERTIES. 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 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. Q_DECLARE_FLAGS ( Flags , Enum ) Q_DECLARE_OPERATORS_FOR_FLAGS ( Flags ) 详细描述 QFlags class provides a type-safe way of storing OR-combinations. First what does Q_DECLARE_FLAGS do? From the Qt documentation, this macro expands to, in this case:. To make the flags available for this purpose, the Q_FLAGS () macro must be used. The Q_DECLARE_PRIVATE Macro. If I click on the lightbulb, if I am lucky, it tells me to use noexcept instead. The licenses are as published by the Free Software** Foundation and appearing in the file LICENSE. I have something like this (example from the QFlags documentation): public: //! Enum doc enum Option { NoOptions = 0x0, //! Value doc ShowTabs = 0x1, ShowAll = 0x2, }; Q_DECLARE_FLAGS (Options, Option) Now I can document Option and its values, and they will be displayed nicely by doxygen. 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. 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 };. To refer to a name declared inside this Qt namespace (such as LeftDockWidgetArea ), you precede it with Qt::. It creates the d_func() function for you, using the variable called d_ptr. If you have looked into Qt source files like this one, you will find it generously sprinkled with Q_D and Q_Q macros. With that we can now construct the Q_ENUM macro: #define Q_ENUM (ENUM) . If the moc generated code fails to compile add the following to the bottom of the the file it includes (X11 headers define Bool): If you need to cast integer values to flags in a untyped fashion, you can use the explicit QFlags constructor as cast operator. 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. ) 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. Code snippets and open source (free software) repositories are indexed and searchable. If G_DEFINE_TYPE is a macro then please config. Last post . Q_STATIC_ASSERT_X (Enum) <=. {"payload":{"allShortcutsEnabled":false,"fileTree":{"src/corelib/tools":{"items":[{"name":"qalgorithms. Q&A for work. 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. As attached in my original post, I use these macro following the code in qgraphicsview. Otherwise it does nothing. QFlags is used throughout Qt for storing combinations of enum values. ignoredirectives variables, non-standard constructs (typically macros) can result in erroneous documentation. To correct this, you must enable the namespace to participate in the Qt MetaObject system [1]. 6. The traditional C++ approach for storing OR-combinations of enum values is to use an int or uint. You use it much like you use a simple integer except that it enforces type safety. pro","contentType":"file"},{"name":"debug. For namespaces use Q_FLAG_NS() instead. 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. See also QObject::installEventFilter(). The Q_DECLARE_FLAGS () macro does not expose the flags to the meta-object system, so they cannot be used by Qt Script. If yours has that name, you can use this macro. Learn more about Teams Get early access and see previews of new features. 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。. But I cannot make doxygen generate anything for Options . It also handles the application's initialization and finalization, as well as system-wide and application-wide settings. pro file: QT += gui x11extras. Export. testFlag(Yes); // b == true flag. With that we can now construct the Q_ENUM macro: #define Q_ENUM (ENUM) . It declares two inline implementations of the d_func() helper method. cpp meta-object flags section1 Naming. The flag of Victoria with a gold field and red Southern Cross surmounted by St Edward's Crown. I can't cast back to Qt::Orientation. Connect and share knowledge within a single location that is structured and easy to search. In qtgui. The QFlags<Enum> class is a template class, where Enum is an enum type. They are treated as normal ints. ** Contact: ** ** This file is part of the QtSerialBus module of the Qt Toolkit. 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。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。如果要为自己的enum类型使用QFlags，请使用Q_DECLARE_FLAGS（）和Q_DECLARE_OPERATORS_for_FLAGS（）。The namespace does not have a static QMetaObject to which the Qt MetaObject system can relate the enumeration. 0. The Ceremony of the Flags was created over 50 years ago,. typedef QFlags<Enum> Flags; Enum is the name of an existing enum type, whereas Flags is the name of the QFlags<Enum> typedef. Current the only supported type info is QML_HAS_ATTACHED_PROPERTIES which declares that the Type supports attached. This is used by QGraphicsAnchorLayout. A regular expression consists of a pattern and optional flags: g, i, m, u, s, y. namespace Qt {. You may have to register before you can post: click the register link above to proceed. The QFlags class provides a type-safe way of storing OR-combinations of enum values. Alot of methods have a QFlags Qt Class as a parameter. [static] template <typename T> QMetaEnum QMetaEnum:: fromType Returns the QMetaEnum corresponding to the type in the template parameter. Commandline flags are flags that users specify on the command line when they run an executable. The QFlags<Enum> class is a template class, where Enum is an enum type. If you have any experience on the Linux command line, then you should have run into command flags, which help us modify the behavior of a command that we are executing. cpp This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. png stSingleData Q_DECLARE_OPERATORS_FOR_FLAGS () 技术标签： Qt qt. Please amend it by providing examples of actual modifications you intend. With accurate type information, Qt's generic containers can choose appropriate storage methods and algorithms. The function can just be called by getFooBarMetaObject (); (without the FooBar:: that would be required if it was a static function instead of a friend). png stNone"," \\image html selectiontype-whole. Bash Script: Flags usage with arguments examples. XML Word Printable. 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. txt","path. c:93:1: warning: There is an unknown macro here somewhere. " in other words: it is already there. 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. All reactionsNeat. If you need to cast integer values to flags in a untyped fashion, you can use the explicit QFlags constructor as cast operator. To review, open the file in an editor. GPL2 and LICENSE. 2 用法示例 1. VALC is the correct syntax, and if you console. At its heart it still is a C++ enum, just with a wrapper. #include <QtCore>. {"payload":{"allShortcutsEnabled":false,"fileTree":{"src/gui/styles":{"items":[{"name":"images","path":"src/gui/styles/images","contentType":"directory"},{"name. With accurate type information, Qt's generic containers can choose appropriate storage methods and algorithms. q_enum用法 2. 2 用法示例 1. This usually becomes simply. I can't cast back to Qt::Orientation. Set the title of the document to. The following table lists the MFC macros that support run-time class information, serialization, and dynamic creation. 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. 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. The traditional C++ approach for storing OR-combinations of enum values is to use an int or uint variable. 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. ** Contact: ** ** This file is part of the QtLocation module of the Qt Toolkit. #ifndef SETTINGS_H #define SETTINGS_H #include <QObject> class Settings : public QObject { Q_OBJECT public: enum GestureType { Unknown, Left,. typedef QFlags<Enum> Flags; 1. For example, for your string reversal and stripping I. pro","path":"TemplateCreator. QFlags is used throughout Qt for storing combinations of enum values. One of the fields in this signal is a 'Qt::Orientation' flag. [/quote] I can't. png stNone"," \\image html selectiontype-whole. friend constexpr const. Up to Qt 6. It associates a type name to a type so that it can be created and destructed dynamically at run-time. log (QMLThing. 2. The problem is that once I have a C++ QObject slot defined that has the QFlags as an argument it doesn't get an error when it is called, but instead passes in the. 1 声明使用 2. enum Qt:: ApplicationAttribute Detailed Description. There are lots of good reasons, like being able to see the value in the debugger: C++ - enum vs. For example: namespace CollectEnums { Q_NAMESPACE enum class CELL_TYPE { Single = 0 , Multi, Nanoliter. Current the only supported type info is QML_HAS_ATTACHED_PROPERTIES. The traditional C++ approach for storing OR-combinations of enum values is to use an int or uint variable. VALC) from QML, it prints 2, which is the correct value. The given link is Registering C++ Types with the QML Type System. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":". Enums are integers, so the or operator would also work without the Q_FLAGS declarations from QML. You can't register enums as a type of qml. 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。. Enumeration Type documentation) Providing the Message class has been registered with the QML type system. 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. The Q_DECLARE_OPERATORS_FOR_FLAGS () macro declares global operator| () functions for Flags, which is of type QFlags<T> . This is a handy macro that hides the ugly stuff for you. Q&A for work. 5, most Qt header files included <QtGlobal>. 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. Q_DECLARE_FLAGS (ProjectReadFlags, ProjectReadFlag) SIP_MONKEYPATCH_FLAGS_UNNEST(QgsProject Project load flags. 简述 2. Re: Use QFlags. "QFlags uses an int as storage, so an enum with underlying ". 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. The declaration of the flags type is done using the Q_DECLARE_FLAGS() macro. searchcode is a free source code search engine. The QFlags<Enum> class is a template class, where Enum is an enum type. 用模板实现一个字符串枚举互转 3. One way you can check the validity of the initial value is to convert the returned keys back to value using QMetaEnum::keysToValue (). 5, most Qt header files included <QtGlobal>. Learn more about TeamsIf this is your first visit, be sure to check out the FAQ by clicking the link above. cpp Generated on 2023-Nov-10 from project qtbase revision v5. The traditional C++ approach for storing OR-combinations of enum values is to use an int or uint variable. 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. Detailed Description. 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_FLAGS ( Flags, Enum) Q_DECLARE_OPERATORS_FOR_FLAGS ( Flags) Detailed Description The QFlags<Enum> class is a template class, where Enum is an. namespace Qt {. If path is empty or already in the path list, the path list is not changed. So, let’s see how we can implement the Flags attribute on enumeration: [Flags] public enum UserType { Customer = 1, Driver = 2, Admin = 4, }. The QFlags class provides a type-safe way of storing OR-combinations of enum values. QFlags is used throughout Qt for storing combinations of enum values. Q_DECLARE_FLAGS (MapSettingsFlags, MapSettingsFlag) SIP_MONKEYPATCH_FLAGS_UNNEST(QgsMapSettings Map settings flags. If not specified by the Cpp. Fix Version/s: None Affects Version/s: None Component/s: Core: I/O. In all other cases an invalid. 用模板实现一个字符串枚举互转 3. // Foo. ** Contact: Nokia Corporation (qt-info@nokia. For maximum portability, you should always try to use QEvent and QObject::installEventFilter() whenever possible. 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 -. Enum names have the same scope as the type name. g. tx","contentType. testFlag(Yes); // a == true flag. /** ** ** Copyright (C) 2015 The Qt Company Ltd. The Alignment type is a typedef for QFlags <AlignmentFlag>. QFlags is used. 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. If it has another name, maybe you should create a macro to make your code look nicer. 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. main. Before Qt 6. QFlags is used throughout Qt for storing combinations of enum values. 5, <QtGlobal> defined an assortment of global declarations. 2 测试例子 3. Add x11extras to the . 1代码 3. {"payload":{"allShortcutsEnabled":false,"fileTree":{"":{"items":[{"name":"TemplateCreator. everything that has to be there is already present and this patch provides exact same functionality as original version - that was working before 6. 1 Answer. #include <QDebug>. If the returned value from QMetaEnum::keysToValue () is equal to the initial value, the initial value should be valid. section1 Flags and the Meta-Object System 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. All documented Qt functions listed alphabetically with a link to where each one is declared.