@section propgrid_processingvalues Processing Property Values
-Properties store their values internally in wxVariant. You can obtain
-this value using wxPGProperty::GetValue() or wxPropertyGridInterface::
-GetPropertyValue().
-
-If you wish to obtain property value in specific data type, you can
-call various getter functions, such as wxPropertyGridInterface::
-GetPropertyValueAsString(), which, as name might say, returns property
-value's string representation. While this particular function is very
-safe to use for any kind of property, some might display error message
-if property value is not in compatible enough format. For instance,
-wxPropertyGridInterface::GetPropertyValueAsLongLong() will support
-long as well as wxLongLong, but GetPropertyValueAsArrayString() only
-supports wxArrayString and nothing else.
-
-In any case, you will need to take extra care when dealing with
-raw wxVariant values. For instance, wxIntProperty and wxUIntProperty,
-store value internally as wx(U)LongLong when number doesn't fit into
-standard long type. Using << operator to get wx(U)LongLong from wxVariant
-is customized to work quite safely with various types of variant data.
-
-You may have noticed that properties store, in wxVariant, values of many
-types which are not natively supported by it. Custom wxVariantDatas
-are therefore implemented and << and >> operators implemented to
-convert data from and to wxVariant.
+Properties store their values internally as wxVariant, but is also possible to
+obtain them as wxAny, using implicit conversion. You can get property
+values with wxPGProperty::GetValue() and
+wxPropertyGridInterface::GetPropertyValue().
+
+Below is a code example which handles wxEVT_PG_CHANGED event:
+
+@code
+
+void MyWindowClass::OnPropertyGridChanged(wxPropertyGridEvent& event)
+{
+ wxPGProperty* property = event.GetProperty();
+
+ // Do nothing if event did not have associated property
+ if ( !property )
+ return;
+
+ // GetValue() returns wxVariant, but it is converted transparently to
+ // wxAny
+ wxAny value = property->GetValue();
+
+ // Also, handle the case where property value is unspecified
+ if ( value.IsNull() )
+ return;
+
+ // Handle changes in values, as needed
+ if ( property.GetName() == "MyStringProperty" )
+ OnMyStringPropertyChanged(value.As<wxString>());
+ else if ( property.GetName() == "MyColourProperty" )
+ OnMyColourPropertyChanged(value.As<wxColour>());
+}
+
+@endcode
+
+You can get a string-representation of property's value using
+wxPGProperty::GetValueAsString() or
+wxPropertyGridInterface::GetPropertyValueAsString(). This particular function
+is very safe to use with any kind of property.
+
+@note There is a one case in which you may want to take extra care when
+ dealing with raw wxVariant values. That is, integer-type properties,
+ such as wxIntProperty and wxUIntProperty, store value internally as
+ wx(U)LongLong when number doesn't fit into standard long type. Using
+ << operator to get wx(U)LongLong from wxVariant is customized to work
+ quite safely with various types of variant data. However, you can also
+ bypass this problem by using wxAny in your code instead of wxVariant.
Note that in some cases property value can be Null variant, which means
that property value is unspecified. This usually occurs only when
#include "wx/vector.h"
#include "wx/hashmap.h"
#include "wx/variant.h"
+#include "wx/any.h"
#include "wx/longlong.h"
#include "wx/clntdata.h"
\
virtual wxVariantData* Clone() const { return new classname##VariantData(m_value); } \
\
+ DECLARE_WXANY_CONVERSION() \
protected:\
classname m_value; \
};\
\
+IMPLEMENT_TRIVIAL_WXANY_CONVERSION(classname, classname##VariantData) \
+\
wxString classname##VariantData::GetType() const\
{\
return wxS(#classname);\
wxPGProperty* property = event.GetProperty();
const wxString& name = property->GetName();
- wxVariant value = property->GetValue();
+
+ // Properties store values internally as wxVariants, but it is preferred
+ // to use the more modern wxAny at the interface level
+ wxAny value = property->GetValue();
// Don't handle 'unspecified' values
if ( value.IsNull() )
return;
+ //
+ // FIXME-VC6: In order to compile on Visual C++ 6.0, wxANY_AS()
+ // macro is used. Unless you want to support this old
+ // compiler in your own code, you can use the more
+ // nicer form value.As<FOO>() instead of
+ // wxANY_AS(value, FOO).
+ //
+
// Some settings are disabled outside Windows platform
if ( name == wxT("X") )
- SetSize ( m_pPropGridManager->GetPropertyValueAsInt(property), -1, -1, -1, wxSIZE_USE_EXISTING );
+ SetSize( wxANY_AS(value, int), -1, -1, -1, wxSIZE_USE_EXISTING );
else if ( name == wxT("Y") )
// wxPGVariantToInt is safe long int value getter
- SetSize ( -1, value.GetLong(), -1, -1, wxSIZE_USE_EXISTING );
+ SetSize ( -1, wxANY_AS(value, int), -1, -1, wxSIZE_USE_EXISTING );
else if ( name == wxT("Width") )
- SetSize ( -1, -1, m_pPropGridManager->GetPropertyValueAsInt(property), -1, wxSIZE_USE_EXISTING );
+ SetSize ( -1, -1, wxANY_AS(value, int), -1, wxSIZE_USE_EXISTING );
else if ( name == wxT("Height") )
- SetSize ( -1, -1, -1, value.GetLong(), wxSIZE_USE_EXISTING );
+ SetSize ( -1, -1, -1, wxANY_AS(value, int), wxSIZE_USE_EXISTING );
else if ( name == wxT("Label") )
{
- SetTitle ( m_pPropGridManager->GetPropertyValueAsString(property) );
+ SetTitle( wxANY_AS(value, wxString) );
}
else if ( name == wxT("Password") )
{
else
if ( name == wxT("Font") )
{
- wxFont font;
- font << value;
+ wxFont font = wxANY_AS(value, wxFont);
wxASSERT( font.Ok() );
m_pPropGridManager->SetFont( font );
else
if ( name == wxT("Margin Colour") )
{
- wxColourPropertyValue cpv;
- cpv << value;
+ wxColourPropertyValue cpv = wxANY_AS(value, wxColourPropertyValue);
m_pPropGridManager->GetGrid()->SetMarginColour( cpv.m_colour );
}
else if ( name == wxT("Cell Colour") )
{
- wxColourPropertyValue cpv;
- cpv << value;
+ wxColourPropertyValue cpv = wxANY_AS(value, wxColourPropertyValue);
m_pPropGridManager->GetGrid()->SetCellBackgroundColour( cpv.m_colour );
}
else if ( name == wxT("Line Colour") )
{
- wxColourPropertyValue cpv;
- cpv << value;
+ wxColourPropertyValue cpv = wxANY_AS(value, wxColourPropertyValue);
m_pPropGridManager->GetGrid()->SetLineColour( cpv.m_colour );
}
else if ( name == wxT("Cell Text Colour") )
{
- wxColourPropertyValue cpv;
- cpv << value;
+ wxColourPropertyValue cpv = wxANY_AS(value, wxColourPropertyValue);
m_pPropGridManager->GetGrid()->SetCellTextColour( cpv.m_colour );
}
}
pgman = m_pPropGridManager;
}
+ {
+ //
+ // Test wxAny<->wxVariant conversion
+ RT_START_TEST(WXVARIANT_TO_WXANY_CONVERSION)
+
+ wxPGProperty* prop;
+ wxAny any;
+
+#if wxUSE_DATETIME
+ prop = pgman->GetProperty("DateProperty");
+ wxDateTime testTime = wxDateTime::Now();
+ any = testTime;
+ prop->SetValue(any);
+ if ( prop->GetValue().GetAny().As<wxDateTime>() != testTime )
+ RT_FAILURE();
+#endif
+
+ prop = pgman->GetProperty("IntProperty");
+ int testInt = 25537983;
+ any = testInt;
+ prop->SetValue(any);
+ if ( prop->GetValue().GetAny().As<int>() != testInt )
+ RT_FAILURE();
+#ifdef wxLongLong_t
+ if ( prop->GetValue().GetAny().As<wxLongLong_t>() != testInt )
+ RT_FAILURE();
+#endif
+
+ prop = pgman->GetProperty("StringProperty");
+ wxString testString = "asd934jfyn3";
+ any = testString;
+ prop->SetValue(any);
+ if ( prop->GetValue().GetAny().As<wxString>() != testString )
+ RT_FAILURE();
+
+ // Test with a type generated with IMPLEMENT_VARIANT_OBJECT()
+ prop = pgman->GetProperty("ColourProperty");
+ wxColour testCol = *wxCYAN;
+ any = testCol;
+ prop->SetValue(any);
+ if ( prop->GetValue().GetAny().As<wxColour>() != testCol )
+ RT_FAILURE();
+
+ // Test with a type with custom wxVariantData defined by
+ // wxPG headers.
+ prop = pgman->GetProperty("Position");
+ wxPoint testPoint(199, 199);
+ any = testPoint;
+ prop->SetValue(any);
+ if ( prop->GetValue().GetAny().As<wxPoint>() != testPoint )
+ RT_FAILURE();
+ }
+
{
RT_START_TEST(GetPropertyValues)
projects / wxWidgets.git / commitdiff
