Implement wxFontDialog::SetTitle() in wxMSW

Base class SetTitle() implementation didnd't work for this class as it
used the (invalid) HWND of not yet existing dialog, so add a hook
procedure for the common font dialog, similar to the existing one for
wxColourDialog, which allows us to set the dialog title when the dialog
is really created.

Closes https://github.com/wxWidgets/wxWidgets/pull/865

Closes #18177.

docs/changes.txt

@@ -124,6 +124,7 @@ wxMSW:
 - Fix positioning windows at positions >= SHORT_MAX (Cătălin Răceanu).
 - Honour alignment flags for multiline buttons using custom colours too.
 - Support MSVC auto-linking when using monolithic build too (PB).
+- Implement wxFontDialog::SetTitle() (Vitaly Stakhovsky).
 - Fix build in ANSI (non-Unicode) mode.
 
 wxOSX:

include/wx/msw/fontdlg.h

@@ -25,8 +25,12 @@ public:
         : wxFontDialogBase(parent, data) { Create(parent, data); }
 
     virtual int ShowModal() wxOVERRIDE;
+    virtual void SetTitle(const wxString& title) wxOVERRIDE;
+    virtual wxString GetTitle() const wxOVERRIDE;
 
 protected:
+    wxString m_title;
+
     wxDECLARE_DYNAMIC_CLASS_NO_COPY(wxFontDialog);
 };
 

src/msw/fontdlg.cpp

@@ -49,10 +49,45 @@ wxIMPLEMENT_DYNAMIC_CLASS(wxFontDialog, wxDialog);
 // implementation
 // ============================================================================
 
+// ----------------------------------------------------------------------------
+// font dialog hook proc used for setting the dialog title if necessary
+// ----------------------------------------------------------------------------
+
+static
+UINT_PTR CALLBACK
+wxFontDialogHookProc(HWND hwnd,
+                     UINT uiMsg,
+                     WPARAM WXUNUSED(wParam),
+                     LPARAM lParam)
+{
+    if ( uiMsg == WM_INITDIALOG )
+    {
+        CHOOSEFONT *pCH = (CHOOSEFONT *)lParam;
+        wxFontDialog * const
+            dialog = reinterpret_cast<wxFontDialog *>(pCH->lCustData);
+
+        ::SetWindowText(hwnd, dialog->GetTitle().t_str());
+    }
+
+    return 0;
+}
+
 // ----------------------------------------------------------------------------
 // wxFontDialog
 // ----------------------------------------------------------------------------
 
+void wxFontDialog::SetTitle(const wxString& title)
+{
+    // Just store the title here, we can't set it right now because the dialog
+    // doesn't exist yet -- it will be created only when ShowModal() is called.
+    m_title = title;
+}
+
+wxString wxFontDialog::GetTitle() const
+{
+    return m_title;
+}
+
 int wxFontDialog::ShowModal()
 {
     WX_HOOK_MODAL_DIALOG();
@@ -71,6 +106,15 @@ int wxFontDialog::ShowModal()
     chooseFontStruct.hwndOwner = hWndParent;
     chooseFontStruct.lpLogFont = &logFont;
 
+    // Currently we only use the hook to set the title, so only set it up if
+    // we really need to do this.
+    if ( !m_title.empty() )
+    {
+        flags |= CF_ENABLEHOOK;
+        chooseFontStruct.lCustData = (LPARAM)this;
+        chooseFontStruct.lpfnHook = wxFontDialogHookProc;
+    }
+
     if ( m_fontData.m_initialFont.IsOk() )
     {
         flags |= CF_INITTOLOGFONTSTRUCT;