Refactor wxPGSpinCtrlEditor.

Declare and use attribute constant instead of explicit string "MotionSpin".


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78399 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/propgrid/property.h

@@ -681,6 +681,7 @@ wxPG_PROP_CLASS_SPECIFIC_3          = 0x00400000
 */
 #define wxPG_DATE_PICKER_STYLE              wxS("PickerStyle")
 
+#if wxUSE_SPINBTN
 /** SpinCtrl editor, int or double. How much number changes when button is
     pressed (or up/down on keyboard).
 */
@@ -690,6 +691,12 @@ wxPG_PROP_CLASS_SPECIFIC_3          = 0x00400000
 */
 #define wxPG_ATTR_SPINCTRL_WRAP             wxS("Wrap")
 
+/** SpinCtrl editor, bool. If true, moving mouse when one of the spin
+    buttons is depressed rapidly changing "spin" value.
+*/
+#define wxPG_ATTR_SPINCTRL_MOTION           wxS("MotionSpin")
+#endif  // wxUSE_SPINBTN
+
 /**
     wxMultiChoiceProperty, int.
     If 0, no user strings allowed. If 1, user strings appear before list