Add a property to configure file property dialog kind.

Add wxPG_FILE_DIALOG_STYLE allowing to pass wxFileDialog style that should be
used by the given wxFileProperty. This notably allows to have file properties
accepting not yet existing files, as is needed when using them for the file
names to be saved, not opened.

Closes #13894.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70449 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/propgrid/property.h

@@ -650,6 +650,11 @@ wxPG_PROP_BEING_DELETED             = 0x00200000
 */
 #define wxPG_FILE_DIALOG_TITLE              wxS("DialogTitle")
 
+/** Specific to wxFileProperty and derivatives, long, default is 0.
+    Sets a specific wxFileDialog style for the file dialog.
+*/
+#define wxPG_FILE_DIALOG_STYLE              wxS("DialogStyle")
+
 /** Specific to wxDirProperty, wxString, default is empty.
     Sets a specific message for the dir dialog.
 */

interface/wx/propgrid/property.h

@@ -125,6 +125,13 @@
 */
 #define wxPG_FILE_DIALOG_TITLE              wxS("DialogTitle")
 
+/** Specific to wxFileProperty and derivatives, long, default is 0.
+    Sets a specific wxFileDialog style for the file dialog, e.g. ::wxFD_SAVE.
+
+    @since 2.9.4
+*/
+#define wxPG_FILE_DIALOG_STYLE              wxS("DialogStyle")
+
 /** Specific to wxDirProperty, wxString, default is empty.
     Sets a specific message for the dir dialog.
 */

src/propgrid/props.cpp

@@ -1704,7 +1704,7 @@ bool wxPGFileDialogAdapter::DoShowDialog( wxPropertyGrid* propGrid, wxPGProperty
                       property->GetAttribute(wxS("InitialPath"), path),
                       wxEmptyString,
                       property->GetAttribute(wxPG_FILE_WILDCARD, wxALL_FILES),
-                      0,
+                      property->GetAttributeAsLong(wxPG_FILE_DIALOG_STYLE, 0),
                       wxDefaultPosition );
 
     if ( indFilter >= 0 )