From da89830af414f55a37a211293cdb81958d478aa6 Mon Sep 17 00:00:00 2001
From: Julian Smart <julian@anthemion.co.uk>
Date: Thu, 24 Sep 2009 09:07:13 +0000
Subject: [PATCH] Applied #10025 (Patch to allow proper sizing of simple combo
 box)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62058 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 include/wx/msw/choice.h |  3 +++
 src/msw/choice.cpp      | 34 ++++++++++++++++++++++++++++------
 2 files changed, 31 insertions(+), 6 deletions(-)

diff --git a/include/wx/msw/choice.h b/include/wx/msw/choice.h
index e069ec2a48..5ddb312b11 100644
--- a/include/wx/msw/choice.h
+++ b/include/wx/msw/choice.h
@@ -135,6 +135,9 @@ protected:
     // free all memory we have (used by Clear() and dtor)
     void Free();
 
+    // set the height for simple combo box
+    int SetHeightSimpleComboBox(int nItems) const;
+
 #if wxUSE_DEFERRED_SIZING
     virtual void MSWEndDeferWindowPos();
 #endif // wxUSE_DEFERRED_SIZING
diff --git a/src/msw/choice.cpp b/src/msw/choice.cpp
index 55f5106096..6910839ffb 100644
--- a/src/msw/choice.cpp
+++ b/src/msw/choice.cpp
@@ -552,13 +552,20 @@ void wxChoice::DoSetSize(int x, int y,
     // don't make the drop down list too tall, arbitrarily limit it to 30
     // items max and also don't make it too small if it's currently empty
     size_t nItems = GetCount();
-    if ( !nItems )
-        nItems = 9;
-    else if ( nItems > 30 )
-        nItems = 30;
+    if (!HasFlag(wxCB_SIMPLE))
+    {
+        if ( !nItems )
+            nItems = 9;
+        else if ( nItems > 30 )
+            nItems = 30;
+    }
 
     const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
-    const int heightWithItems = height + hItem*nItems;
+    int heightWithItems = 0;
+    if (!HasFlag(wxCB_SIMPLE))
+        heightWithItems = height + hItem*nItems;
+    else
+        heightWithItems = SetHeightSimpleComboBox(nItems);
 
 
     // do resize the native control
@@ -592,6 +599,7 @@ wxSize wxChoice::DoGetBestSize() const
 {
     // find the widest string
     int wChoice = 0;
+    int hChoice;
     const unsigned int nItems = GetCount();
     for ( unsigned int i = 0; i < nItems; i++ )
     {
@@ -608,12 +616,26 @@ wxSize wxChoice::DoGetBestSize() const
 
     // the combobox should be slightly larger than the widest string
     wChoice += 5*GetCharWidth();
+    if( HasFlag( wxCB_SIMPLE ) )
+    {
+        hChoice = SetHeightSimpleComboBox( nItems );
+    }
+    else
+        hChoice = EDIT_HEIGHT_FROM_CHAR_HEIGHT(GetCharHeight());
 
-    wxSize best(wChoice, EDIT_HEIGHT_FROM_CHAR_HEIGHT(GetCharHeight()));
+    wxSize best(wChoice, hChoice);
     CacheBestSize(best);
     return best;
 }
 
+int wxChoice::SetHeightSimpleComboBox(int nItems) const
+{
+    int cx, cy;
+    wxGetCharSize( GetHWND(), &cx, &cy, GetFont() );
+    int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, -1, 0);
+    return EDIT_HEIGHT_FROM_CHAR_HEIGHT( cy ) * wxMin( wxMax( nItems, 3 ), 6 ) + hItem - 1;
+}
+
 // ----------------------------------------------------------------------------
 // MSW message handlers
 // ----------------------------------------------------------------------------
-- 
2.47.2