This is strange indeed. You do two things in your C++ program that
aren't necessary and may/should cause problems.
This statement should not even compile as wxLuaState::Create() returns a bool.
m_wxlState = m_wxlState.Create(this);
This is not necessary as wxLua does this already, but it may be harmless.
luaL_openlibs(L);
You should do some simple debugging like printing the position and
size of the wxButton to make sure that it really was created and does
not have a zero size.
Finally, please look at the wxLuaFreeze app which is the simplest
incarnation of initializing wxLua in a C++ app.
Regards,
John
On Thu, Nov 19, 2009 at 8:25 AM, Mark Rushakoff
<[email protected]> wrote:
> I already asked this question on StackOverflow
> (http://stackoverflow.com/questions/1759366/embedded-wxlua-not-displaying-most-controls-but-still-does-layout-correctly),
> so I'm pretty much doing a copy-paste of it here. Feel free to duplicate
> any answers there if you've got an account.
>
> I am having trouble getting embedded wxLua to work with my application -- it
> works fine when I use the wxLua DLLs, but I'm trying to use the static
> libraries so I can distribute a single, standalone executable with no
> external dependencies.
>
> First, the symptoms: Most controls (such as wxButtons, wxGauges, wxTextCtrls)
> do not display; at the very least, wxStaticTexts display, and I can
> successfully use menus to show an about menu and to quit.
>
> Here's a simple test script:
>
> require("wx")
> frame = wx.wxFrame(wx.NULL, wx.wxID_ANY, "Frame")
> panel = wx.wxPanel(frame, wx.wxID_ANY)
> hbox = wx.wxBoxSizer(wx.wxHORIZONTAL)
> hbox:Add(wx.wxButton(panel, wx.wxID_ANY, "I'm a button"))
> hbox:Add(wx.wxStaticText(panel, wx.wxID_ANY, "Hello"))
> panel:SetSizerAndFit(hbox)
> frame:Show(true)
> wx.wxGetApp():MainLoop()
>
> The top window in this screen shot shows a raw `lua file.lua` that calls the
> wx library, and the bottom one shows the result when run from my embedded
> wxLua:
>
> http://img337.imageshack.us/img337/8425/wxluaissue.png
>
> As you can see, the widgets that do show up get placed correctly, but the
> widgets that don't show up, neither get rendered nor process events.
>
> Here's the offending (minimalized) C++:
>
> extern "C" {
> #include "lua.h"
> #include "lualib.h"
> #include "lauxlib.h"
> }
> #include "wx/app.h"
> #include "wx/image.h"
>
> // disable some of the libraries we're didn't want
> #define wxLUA_USEBINDING_WXHTML 0
> #define wxLUA_USEBINDING_WXNET 0
> #define wxLUA_USEBINDING_WXLUASOCKET 0
> #define wxLUA_USEBINDING_WXSTC 0
> #include "wxbind/include/wxbinddefs.h"
> #include "wx/msgdlg.h"
>
> WXLUA_DECLARE_BIND_ALL;
>
> class MyApp : public wxApp
> {
> public:
> virtual bool OnInit();
> virtual int OnExit();
> void OnLua(wxLuaEvent &e);
> wxLuaState m_wxlState;
> private:
> DECLARE_EVENT_TABLE();
> };
>
> IMPLEMENT_APP(MyApp)
>
> BEGIN_EVENT_TABLE(MyApp, wxApp)
> EVT_LUA_ERROR (wxID_ANY, MyApp::OnLua)
> END_EVENT_TABLE()
>
> bool MyApp::OnInit()
> {
> WXLUA_IMPLEMENT_BIND_ALL
>
> wxInitAllImageHandlers();
> wxLuaState::sm_wxAppMainLoop_will_run = true;
> m_wxlState = m_wxlState.Create(this);
> lua_State *L = m_wxlState.GetLuaState();
>
> luaL_openlibs(L);
> int res = luaL_dofile(L, "C:\\file.lua");
> if (res != 0)
> {
> wxMessageBox(wxString::FromAscii(lua_tostring(L, -1)), wxT("Error
> running script"));
> return false;
> }
>
> return true;
> }
>
> int MyApp::OnExit()
> {
> wxMessageBox(wxT("Goodbye!"));
> m_wxlState.CloseLuaState(true);
> m_wxlState.Destroy();
> return wxApp::OnExit();
> }
>
> void MyApp::OnLua(wxLuaEvent &e)
> {
> wxMessageBox(e.GetString(), wxT("wxLua"));
> }
>
> I have stripped down both wxWidgets and wxLua using their setup.h and
> wxluasetup.h files; I can succcessfully render buttons if I use wxWidgets in
> pure C++, so I think the issue is with either how I compiled wxLua, or how
> I'm configuring the wxLuaState.
>
> I think I've configured the wxLuaState correctly, but I haven't been able to
> find an example where all of the work is done in a luaL_dofile -- all the
> other examples have custom wx-derived classes, except for wxlua.cpp, which is
> a little different since it's for the wx.dll that Lua uses. I've spent
> several hours trying to figure out what I'm doing wrong, and I'm completely
> out of ideas at this point.
>
> Has anyone seen this issue before, or can anyone confirm or deny that I'm
> setting up the wxLuaState correctly?
>
> Mark
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