#1156 Added tristate class and checkbox editor with tristate support

Fwk/AppFwk/cafProjectDataModel/cafPdmCore/CMakeLists.txt

@@ -41,6 +41,9 @@ set( PROJECT_FILES
 
     cafNotificationCenter.cpp
 	cafNotificationCenter.h
+
+    cafTristate.cpp
+	cafTristate.h
 )
 
 

Fwk/AppFwk/cafProjectDataModel/cafPdmCore/cafTristate.cpp

@@ -0,0 +1,158 @@
+#include "cafTristate.h"
+
+#include <QTextStream>
+
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+caf::Tristate::Tristate()
+    : m_state(State::False)
+{
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+void caf::Tristate::operator=(const Tristate& other)
+{
+    m_state = other.m_state;
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+void caf::Tristate::operator=(const State& state)
+{
+    m_state = state;
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+bool caf::Tristate::operator==(const Tristate& other) const
+{
+    return m_state == other.m_state;
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+bool caf::Tristate::operator==(State state) const
+{
+    return m_state == state;
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+bool caf::Tristate::operator!=(const Tristate& other) const
+{
+    return !(m_state == other.m_state);
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+caf::Tristate::State caf::Tristate::state() const
+{
+    return m_state;
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+bool caf::Tristate::isTrue() const
+{
+    return m_state == State::True;
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+bool caf::Tristate::isPartiallyTrue() const
+{
+    return m_state == State::PartiallyTrue;
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+bool caf::Tristate::isFalse() const
+{
+    return m_state == State::False;
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+QString caf::Tristate::text() const
+{
+    QString txt;
+
+    switch (m_state)
+    {
+    case Tristate::State::False:
+        txt = "False";
+        break;
+    case Tristate::State::PartiallyTrue:
+        txt = "PartiallyTrue";
+        break;
+    case Tristate::State::True:
+        txt = "True";
+        break;
+    default:
+        break;
+    }
+
+    return txt;
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+void caf::Tristate::setFromText(const QString& valueText)
+{
+    QString lowerCase = valueText.toLower();
+
+    if (lowerCase == "false")
+    {
+        m_state = State::False;
+    }
+    else if (lowerCase == "partiallytrue")
+    {
+        m_state = State::PartiallyTrue;
+    }
+    else if (lowerCase == "true")
+    {
+        m_state = State::True;
+    }
+}
+
+
+
+
+
+
+
+
+
+
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+void operator >> (QTextStream& str, caf::Tristate& triplet)
+{
+    QString text;
+    str >> text;
+    triplet.setFromText(text);
+}
+
+//--------------------------------------------------------------------------------------------------
+/// 
+//--------------------------------------------------------------------------------------------------
+void operator << (QTextStream& str, const caf::Tristate& triplet)
+{
+    str << triplet.text();
+}

Fwk/AppFwk/cafProjectDataModel/cafPdmCore/cafTristate.h

@@ -0,0 +1,53 @@
+
+
+#pragma once
+
+#include <QMetaType>
+
+class QTextStream;
+
+
+namespace caf
+{
+
+//==================================================================================================
+//==================================================================================================
+class Tristate 
+{
+public:
+    enum class State {False, PartiallyTrue, True};
+
+public:
+    Tristate();
+
+    void operator=(const Tristate& other);
+    void operator=(const State& state);
+
+    bool operator==(const Tristate& other) const;
+    bool operator==(State state) const;
+    bool operator!=(const Tristate& other) const;
+
+    State   state() const;
+    
+    bool    isTrue() const;
+    bool    isPartiallyTrue() const;
+    bool    isFalse() const;
+    
+    QString text() const;
+    void    setFromText(const QString& valueText);
+
+protected:
+    State m_state;
+};
+
+
+} // end namespace caf
+
+
+//==================================================================================================
+// Overload of QTextStream for caf::Triplet
+//==================================================================================================
+void operator >> (QTextStream& str, caf::Tristate& triplet);
+void operator << (QTextStream& str, const caf::Tristate& triplet);
+
+Q_DECLARE_METATYPE(caf::Tristate);