#QtnProperty This is user and programmist friendly properties for Qt framework #Overview There are some limitations of standard Qt property system. This project is an attempt to make better properties for programmist and user. The key features are:

• Properties hierarchy (properties can be organized in hierarchy at any depth)
• Property widget to observe and edit properties in uniform way
• Signals before and after property has changed
• Property description - short text which help user to understand meaning and purpose of the property
• Property state - property can be disabled or hidden at any moment
• Serialization via QDataStream
• Set/Get property value to/from QVariant and QString
• Scripting support
• Delegates to customize look and feel properties in property widget
• PEG (property/enum generator) - it's tool like Qt moc which generates properties hierarchy from QML like files.

Here are screenshots of the Demo application:

#How to build Requirements:

1. Qt 5.2 framework
2. Flex 2.5.37 and Bison 2.7 (for Windows can be found here)

To build:

mkdir path_to_build
cd path_to_build
qmake path_to_QtnProperty/Property.pro -r
make

Generated libraries and executables will be placed into the 'path_to_build/bin' folder. Precomiled libraries and Demo application you can download here

To run tests and demo:

cd path_to_build/bin
./QtnPropertyTests
./QtnPropertyDemo

QtnProperty project consisit of five submodules:

1. QtnPropertyCore library - property classes (non GUI stuff)
2. QtnPropertyWidget library - QtnPropertyWidget, QtnPropertyView and property delegates (GUI stuff)
3. QtnPEG tool - executable to generate C++ code for propert sets from simple QML like files (*.pef files)
4. QtnPropertyTests - tests for QtnPropertyCore library
5. QtnPropertyDemo - demo application

#How to use

1. Write *.pef file with propertyset declaration. For example TextEditor.pef:

#include "Core/PropertyCore.h"

property_set TextEditor
{
    Bool enableWrapping
    {
        description = "Enable/disable text wrapping";
        value = true;
    }
    
    Bool replaceTabsWithSpaces
    {
        description = "Automatically replace tabs with spaces";
        value = false;
            
        slot propertyDidChange
        {
            tabSize.switchState(QtnPropertyStateImmutable, !replaceTabsWithSpaces);
        }
    }
    
    UInt tabSize
    {
        description = "Number of spaces to be placed.";
        state = QtnPropertyStateImmutable;
        value = 4;
    }
}

2. Generate C++ classes by running command (to use *.pef files in your project see PEG.pri)

   ./QtnPEG TextEditor.pef

3. Include generated TextEditor.peg.h and TextEditor.peg.cpp files into your project.

4. Now you can use QtnPropertySetTextEditor class (defined in generated files) in your C++ code like this:

    QtnPropertySetTextEditor params;
    params.enableWrapping = false;
    if (params.replaceTabsWithSpaces)
        document.replaceTabsWithSpaces(params.tabSize);