Implement DoGetSizeFromTextSize() for wxMSW wx{Choice,Combobox,TextCtrl}.

Refactor and improve the existing DoGetBestSize() implementations to use
DoGetBestSize().

Closes #14816.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@72954 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/choice.h

@@ -127,6 +127,7 @@ protected:
     virtual void DoSetSize(int x, int y,
                            int width, int height,
                            int sizeFlags = wxSIZE_AUTO);
+    virtual wxSize DoGetSizeFromTextSize(int xlen, int ylen = -1) const;
 
     // Show or hide the popup part of the control.
     void MSWDoPopupOrDismiss(bool show);

include/wx/msw/combobox.h

@@ -132,6 +132,8 @@ protected:
     virtual void DoSetToolTip(wxToolTip *tip);
 #endif
 
+    virtual wxSize DoGetSizeFromTextSize(int xlen, int ylen = -1) const;
+
     // this is the implementation of GetEditHWND() which can also be used when
     // we don't have the edit control, it simply returns NULL then
     //

include/wx/msw/textctrl.h

@@ -236,6 +236,7 @@ protected:
     bool SendUpdateEvent();
 
     virtual wxSize DoGetBestSize() const;
+    virtual wxSize DoGetSizeFromTextSize(int xlen, int ylen = -1) const;
 
 #if wxUSE_RICHEDIT
     // Apply the character-related parts of wxTextAttr to the given selection