Added samples/dll for showing how to use wxWidgets to implement

a DLL that is used from another application written with a different
toolkit (or different wx version).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@62784 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/dll/wx_exe.cpp

@@ -0,0 +1,137 @@
+/////////////////////////////////////////////////////////////////////////////
+// Name:        wx_exe.cpp
+// Purpose:     Sample showing how to use wx from a DLL
+// Author:      Vaclav Slavik
+// Created:     2009-12-03
+// RCS-ID:      $Id$
+// Copyright:   (c) 2009 Vaclav Slavik
+// Licence:     wxWindows licence
+/////////////////////////////////////////////////////////////////////////////
+
+// ============================================================================
+// declarations
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+#include "wx/wxprec.h"
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+#include "my_dll.h"
+
+#include "wx/app.h"
+#include "wx/frame.h"
+#include "wx/panel.h"
+#include "wx/sizer.h"
+#include "wx/stattext.h"
+#include "wx/button.h"
+
+
+// ----------------------------------------------------------------------------
+// GUI classes
+// ----------------------------------------------------------------------------
+
+static const int ID_RUN_DLL = wxNewId();
+
+class MainFrame : public wxFrame
+{
+public:
+    MainFrame();
+
+    void OnRunDLL(wxCommandEvent& event);
+
+    DECLARE_EVENT_TABLE()
+};
+
+
+class MainApp : public wxApp
+{
+public:
+    virtual bool OnInit();
+    virtual int OnExit();
+};
+
+
+// ============================================================================
+// implementation
+// ============================================================================
+
+// ----------------------------------------------------------------------------
+// MainFrame
+// ----------------------------------------------------------------------------
+
+BEGIN_EVENT_TABLE(MainFrame, wxFrame)
+    EVT_BUTTON(ID_RUN_DLL, MainFrame::OnRunDLL)
+END_EVENT_TABLE()
+
+MainFrame::MainFrame()
+    : wxFrame(NULL, wxID_ANY, "Main wx app",
+              wxDefaultPosition, wxSize(400, 300))
+{
+    wxPanel *p = new wxPanel(this, wxID_ANY);
+    wxSizer *sizer = new wxBoxSizer(wxVERTICAL);
+
+    sizer->Add
+           (
+               new wxStaticText
+                   (
+                       p, wxID_ANY,
+                       wxString::Format
+                       (
+                           "Main wxApp instance is %p (%s),\n"
+                           "thread ID %ld.\n",
+                           wxApp::GetInstance(),
+                           wxVERSION_STRING,
+                           wxThread::GetCurrentId()
+                       )
+                   ),
+               wxSizerFlags(1).Expand().Border(wxALL, 10)
+           );
+
+    sizer->Add
+           (
+               new wxButton(p, ID_RUN_DLL, "Run GUI from DLL"),
+               wxSizerFlags(0).Right().Border(wxALL, 10)
+           );
+
+    p->SetSizerAndFit(sizer);
+
+    wxSizer *fsizer = new wxBoxSizer(wxVERTICAL);
+    fsizer->Add(p, wxSizerFlags(1).Expand());
+    SetSizerAndFit(fsizer);
+}
+
+void MainFrame::OnRunDLL(wxCommandEvent& WXUNUSED(event))
+{
+    run_wx_gui_from_dll("child instance");
+}
+
+
+// ----------------------------------------------------------------------------
+// MainApp
+// ----------------------------------------------------------------------------
+
+bool MainApp::OnInit()
+{
+    if ( !wxApp::OnInit() )
+        return false;
+
+    wxFrame *f = new MainFrame();
+    f->Show(true);
+
+    return true;
+}
+
+int MainApp::OnExit()
+{
+    wx_dll_cleanup();
+    return wxApp::OnExit();
+}
+
+
+IMPLEMENT_APP(MainApp)