wxPersistentDialog class for saving dialog position added

build/wxExtend.vcxproj

@@ -38,6 +38,7 @@
     <ClInclude Include="..\include\wxex\crypto.h" />
     <ClInclude Include="..\include\wxex\hex.h" />
     <ClInclude Include="..\include\wxex\persist\auimanager.h" />
+    <ClInclude Include="..\include\wxex\persist\dialog.h" />
     <ClInclude Include="..\include\wxex\xml.h" />
     <ClInclude Include="..\src\stdafx.h" />
   </ItemGroup>

build/wxExtend.vcxproj.filters

@@ -66,6 +66,9 @@
     <ClInclude Include="..\include\wxex\persist\auimanager.h">
       <Filter>Header Files\persist</Filter>
     </ClInclude>
+    <ClInclude Include="..\include\wxex\persist\dialog.h">
+      <Filter>Header Files\persist</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <None Include="..\locale\wxExtend.pot">

include/wxex/persist/dialog.h

@@ -0,0 +1,103 @@
+/*
+    Copyright 2015-2016 Amebis
+
+    This file is part of wxExtend.
+
+    wxExtend is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    wxExtend is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with wxExtend. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#pragma once
+
+#include "../common.h"
+
+#include <wx/persist.h>
+#include <wx/persist/toplevel.h>
+#include <wx/persist/window.h>
+#include <wx/dialog.h>
+
+
+// ----------------------------------------------------------------------------
+// string constants used by wxPersistentDialog
+// ----------------------------------------------------------------------------
+
+#define wxPERSIST_DIALOG_KIND "Dialog"
+
+
+///
+/// Supports saving/restoring wxDialog state
+///
+class wxPersistentDialog : public wxPersistentWindow<wxDialog>
+{
+public:
+    wxPersistentDialog(wxDialog *mgr) : wxPersistentWindow<wxDialog>(mgr)
+    {
+    }
+
+    virtual wxString GetKind() const
+    {
+        return wxT(wxPERSIST_DIALOG_KIND);
+    }
+
+    virtual void Save() const
+    {
+        const wxDialog * const wnd = Get();
+
+        // Code copied from wxPersistentTLW::Save()
+        const wxPoint pos = wnd->GetScreenPosition();
+        SaveValue(wxPERSIST_TLW_X, pos.x);
+        SaveValue(wxPERSIST_TLW_Y, pos.y);
+    }
+
+    virtual bool Restore()
+    {
+        wxDialog * const wnd = Get();
+
+        // Code copied from wxPersistentTLW::Restore()
+        long
+            x wxDUMMY_INITIALIZE(-1),
+            y wxDUMMY_INITIALIZE(-1);
+        const wxSize size = wnd->GetSize();
+        const bool hasPos = RestoreValue(wxPERSIST_TLW_X, &x) &&
+                            RestoreValue(wxPERSIST_TLW_Y, &y);
+
+        if (hasPos) {
+            // to avoid making the window completely invisible if it had been
+            // shown on a monitor which was disconnected since the last run
+            // (this is pretty common for notebook with external displays)
+            //
+            // NB: we should allow window position to be (slightly) off screen,
+            //     it's not uncommon to position the window so that its upper
+            //     left corner has slightly negative coordinate
+            if (wxDisplay::GetFromPoint(wxPoint(x         , y         )) != wxNOT_FOUND ||
+                wxDisplay::GetFromPoint(wxPoint(x + size.x, y + size.y)) != wxNOT_FOUND)
+            {
+                wnd->Move(x, y, wxSIZE_ALLOW_MINUS_ONE);
+            }
+        }
+
+        return true;
+    }
+
+private:
+    wxDECLARE_NO_COPY_CLASS(wxPersistentDialog);
+};
+
+
+///
+/// wxDialog's instantiation of wxCreatePersistentObject template
+///
+inline wxPersistentObject *wxCreatePersistentObject(wxDialog *mgr)
+{
+    return new wxPersistentDialog(mgr);
+}