[lmi] [PATCH] tn_range prerequisites for inline editing

[Vaclav Slavik]

Hi,

these two patches add access to type metadata necessary for upcoming
patch that implements inline editing in CensusView. Knowing that a value
is a range is not enough; I need to know the underlying type so that I
can create appropriate picker control. Similarly for str(): I need to have
a way to access any tn_range's value data. 

Regards,
Vaclav


===============================================================
Add tn_range_base::value_type().

This makes it much easier to handle tn_range<> types in generic
GUI code. This information is not readily available otherwise, as
tn_range<> has two template parameters and we're only interested
in the first one in GUI code.
---
 tn_range.hpp |    3 +++
 tn_range.tpp |    5 +++++
 2 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/tn_range.hpp b/tn_range.hpp
index ea2717d..00da419 100644
--- a/tn_range.hpp
+++ b/tn_range.hpp
@@ -149,6 +149,7 @@ class LMI_SO tn_range_base
     virtual bool equal_to(std::string const&) const = 0;
     virtual double universal_minimum() const = 0;
     virtual double universal_maximum() const = 0;
+    virtual std::type_info const& value_type() const = 0;
 };
 
 /// Design notes for class template tn_range.
@@ -276,6 +277,8 @@ class tn_range
     Trammel const& trammel() const;
     Number value() const;
 
+    virtual std::type_info const& value_type() const;
+
   private:
     Number curb(Number) const;
     std::string format_limits_for_error_message() const;
diff --git a/tn_range.tpp b/tn_range.tpp
index 0b8ed6c..e2a084f 100644
--- a/tn_range.tpp
+++ b/tn_range.tpp
@@ -745,3 +745,8 @@ double tn_range<Number,Trammel>::universal_maximum() const
     return value_cast<double>(maximum_);
 }
 
+template<typename Number, typename Trammel>
+std::type_info const& tn_range<Number,Trammel>::value_type() const
+{
+    return typeid(Number);
+}
-- 
1.7.5.4



===============================================================
Make tn_range<>::str() public and move it to tn_range_base.

This, together with existing universal_minimum() and universal_maximum()
methods, makes it possible to access all data that are necessary for the
GUI to construct appropriate UI elements.
---
 tn_range.hpp |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/tn_range.hpp b/tn_range.hpp
index 00da419..f8548e3 100644
--- a/tn_range.hpp
+++ b/tn_range.hpp
@@ -149,6 +149,7 @@ class LMI_SO tn_range_base
     virtual bool equal_to(std::string const&) const = 0;
     virtual double universal_minimum() const = 0;
     virtual double universal_maximum() const = 0;
+    virtual std::string str() const = 0;
     virtual std::type_info const& value_type() const = 0;
 };
 
@@ -277,13 +278,14 @@ class tn_range
     Trammel const& trammel() const;
     Number value() const;
 
+    virtual std::string str() const;
+
     virtual std::type_info const& value_type() const;
 
   private:
     Number curb(Number) const;
     std::string format_limits_for_error_message() const;
     bool is_valid(Number) const;
-    std::string str() const;
 
     // datum_base required implementation.
     virtual std::istream& read (std::istream&);
-- 
1.7.5.4