X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/e69683678e8fd0a8ec73a7ba4557a1cec1675797..864db5de611f630d8b64dec6b648117187381d99:/src/msw/choice.cpp

diff --git a/src/msw/choice.cpp b/src/msw/choice.cpp
index 8e72b07078..8623579663 100644
--- a/src/msw/choice.cpp
+++ b/src/msw/choice.cpp
@@ -127,14 +127,39 @@ bool wxChoice::Create(wxWindow *parent,
                          validator, name);
 }
 
-bool wxChoice::CreateAndInit(wxWindow *parent, wxWindowID id,
+bool wxChoice::CreateAndInit(wxWindow *parent,
+                             wxWindowID id,
                              const wxPoint& pos,
-                             const wxSize& size,
+                             const wxSize& sizeOrig,
                              int n, const wxString choices[],
                              long style,
                              const wxValidator& validator,
                              const wxString& name)
 {
+    // this is a bit hackish but we want to prevent MSWCreateControl() from
+    // calling SetBestSize() (which it would do if any of the size components
+    // is not given) because it wouldn't calculate it correctly if we have any
+    // strings as they're not yet added to the control when it is called
+    //
+    // so: if we have any strings, we fudge the size parameter so that
+    // SetBestSize() is not called by MSWCreateControl() but then we do call it
+    // manually below
+    bool autoSize = false;
+    wxSize size = sizeOrig;
+    if ( n )
+    {
+        if ( size.x < 0 )
+        {
+            size.x = 1;
+            autoSize = true;
+        }
+        if ( size.y < 0 )
+        {
+            size.y = 1;
+            autoSize = true;
+        }
+    }
+
     // initialize wxControl
     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
         return FALSE;
@@ -148,12 +173,18 @@ bool wxChoice::CreateAndInit(wxWindow *parent, wxWindowID id,
     // course) background rather than inheriting the parent's background
     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 
-    // initialize
+    // initialize the controls contents
     for ( int i = 0; i < n; i++ )
     {
         Append(choices[i]);
     }
 
+    // and now we may finally size the control properly (if needed)
+    if ( autoSize )
+    {
+        SetBestSize(sizeOrig);
+    }
+
     return TRUE;
 }
 
@@ -407,15 +438,10 @@ wxClientData* wxChoice::DoGetItemClientObject( int n ) const
 // wxMSW specific helpers
 // ----------------------------------------------------------------------------
 
-int wxChoice::GetVisibleHeight() const
-{
-    return ::SendMessage(GetHwnd(), CB_GETITEMHEIGHT, (WPARAM)-1, 0);
-}
-
 void wxChoice::UpdateVisibleHeight()
 {
     // be careful to not change the width here
-    DoSetSize(-1, -1, -1, GetVisibleHeight(), wxSIZE_USE_EXISTING);
+    DoSetSize(-1, -1, -1, GetSize().y, wxSIZE_USE_EXISTING);
 }
 
 void wxChoice::DoMoveWindow(int x, int y, int width, int height)
@@ -438,13 +464,11 @@ void wxChoice::DoMoveWindow(int x, int y, int width, int height)
 
 void wxChoice::DoGetSize(int *w, int *h) const
 {
+    // this is weird: sometimes, the height returned by Windows is clearly the
+    // total height of the control including the drop down list -- but only
+    // sometimes, and normally it isn't... I have no idea about what to do with
+    // this
     wxControl::DoGetSize(w, h);
-
-    // we need to return only the height of the visible part, not the entire
-    // height in the Windows sense which includes the height of the drop down
-    // list as well
-    if ( h )
-        *h = GetVisibleHeight();
 }
 
 void wxChoice::DoSetSize(int x, int y,
@@ -478,10 +502,11 @@ void wxChoice::DoSetSize(int x, int y,
     // as it is not affected by normal WM_SETSIZE
     if ( height != -1 )
     {
-        const int hVisibleCurrent = GetVisibleHeight();
-        if ( hVisibleCurrent != heightOrig )
+        const int delta = heightOrig - GetSize().y;
+        if ( delta )
         {
-            SendMessage(GetHwnd(), CB_SETITEMHEIGHT, (WPARAM)-1, heightOrig);
+            int h = ::SendMessage(GetHwnd(), CB_GETITEMHEIGHT, (WPARAM)-1, 0);
+            SendMessage(GetHwnd(), CB_SETITEMHEIGHT, (WPARAM)-1, h + delta);
         }
     }
 }
@@ -507,7 +532,8 @@ wxSize wxChoice::DoGetBestSize() const
     // the combobox should be slightly larger than the widest string
     wChoice += 5*GetCharWidth();
 
-    return wxSize(wChoice, GetVisibleHeight());
+    // +5 is magic but seems to work well
+    return wxSize(wChoice, GetCharHeight() + 5);
 }
 
 long wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)