From baea344b3c9459e8c1556ad32e2c288b31a4349f Mon Sep 17 00:00:00 2001
From: Markus Gans <guru@server.home.net>
Date: Fri, 19 May 2017 22:47:13 +0200
Subject: [PATCH] FListBox: Import of data from a container via "lazy
 conversion" during item print

---
 ChangeLog        |  2 +-
 src/flistbox.h   | 35 +++++++++++++++++++++++++++++++++++
 test/listbox.cpp | 11 +++++++----
 3 files changed, 43 insertions(+), 5 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index cb51d116..4fff985e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,6 @@
 2017-05-19  Markus Gans  <guru.mail@muenster.de>
 	* FListBox: Import of data from a container via 
-	  "lazy conversion" during item print.
+	  "lazy conversion" during item print
 
 2017-04-23  Markus Gans  <guru.mail@muenster.de>
 	* Import of data from a standard container in FListBox 
diff --git a/src/flistbox.h b/src/flistbox.h
index 75282a71..6f15e0a9 100644
--- a/src/flistbox.h
+++ b/src/flistbox.h
@@ -115,6 +115,8 @@ class FListBox : public FWidget
    explicit FListBox (FWidget* = 0);
    template <class Iterator, class InsertConverter>
    FListBox (Iterator, Iterator, InsertConverter, FWidget* = 0);
+   template <class Container, class LazyConverter>
+   FListBox (Container, LazyConverter, FWidget* = 0);
 
    // Destructor
   ~FListBox();
@@ -303,6 +305,39 @@ inline FListBox::FListBox ( Iterator first
   }
 }
 
+//----------------------------------------------------------------------
+template <class Container, class LazyConverter>
+inline FListBox::FListBox ( Container container
+                          , LazyConverter convert
+                          , FWidget* parent )
+  : FWidget(parent)
+  , convertToItem(0)
+  , data()
+  , source_container(0)
+  , conv_type(FListBox::no_convert)
+  , vbar(0)
+  , hbar(0)
+  , text()
+  , inc_search()
+  , multi_select(false)
+  , mouse_select(false)
+  , drag_scroll(FListBox::noScroll)
+  , scroll_timer(false)
+  , scroll_repeat(100)
+  , scroll_distance(1)
+  , current(0)
+  , last_current(-1)
+  , secect_from_item(-1)
+  , xoffset(0)
+  , yoffset(0)
+  , last_yoffset(-1)
+  , nf_offset(0)
+  , max_line_width(0)
+{
+  init();
+  insert (container, convert);
+}
+
 //----------------------------------------------------------------------
 inline const char* FListBox::getClassName() const
 { return "FListBox"; }
diff --git a/test/listbox.cpp b/test/listbox.cpp
index 920d46a8..0611781f 100644
--- a/test/listbox.cpp
+++ b/test/listbox.cpp
@@ -88,24 +88,27 @@ Listbox::Listbox (FWidget* parent)
     list1->insert (L"----- " + FString().setNumber(i) + L" -----");
 
   // listbox 2
+  double_list = new std::list<double>;
+
+  for (double i=1; i<=15; i++)
+    double_list->push_back(2*i + (i/100));
+
   FListBox* list2 = new FListBox (this);
   list2->setGeometry(21, 1, 10, 10);
   list2->setText ("double");
 
-  double_list = new std::list<double>;
-
   for (double i=1; i<=15; i++)
     double_list->push_back(2*i + (i/100));
 
   //
   // Import via lazy conversion on print
   //
-  //list2->insert (double_list, doubleToItem);
+  list2->insert (double_list, doubleToItem);
 
   //
   // Direct import of the complete list
   //
-  list2->insert (double_list->begin(), double_list->end(), doubleToString);
+  //list2->insert (double_list->begin(), double_list->end(), doubleToString);
 
   // listbox 3
   std::map<FString, FString> TLD;