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User forums => General (but related to Code::Blocks) => Topic started by: chrismac on April 19, 2016, 12:01:21 pm

Title: Helloworld.cpp wxWidgets Working ?
Post by: chrismac on April 19, 2016, 12:01:21 pm
Has anyone got a working sample or helloworld wxWidgets program to compile ? Some seem to be out of date relative to the latest package 3.1.0, or is there a working version/s somewhere ?
Title: Re: Helloworld.cpp wxWidgets Working ?
Post by: stahta01 on April 19, 2016, 09:14:55 pm
To clarify are you talking about code created by the Code::Blocks wxWidgets Wizard or something else?

I am using Code::Blocks to build the wxWidgets (Git master branch) samples right now; some work and some samples do NOT.
I have NOT tested the wxWidgets Wizard with wxWidgets version 3.1; but, since it does NOT have an option to select version 3.1, I would guess that it would fail.

Tim S.
Title: Re: Helloworld.cpp wxWidgets Working ?
Post by: stahta01 on April 19, 2016, 10:37:07 pm
I am having a lot of problems building wxWidgets (Git master branch) samples using Static wxWidgets (Git master branch).

I had to add two libraries which I knew to add because I read it somewhere to reduce the linker errors.
But, it still had a linker error that looks like an wxWidgets bug.

The two libraries I added were "version" and "shlwapi".

The remaining linker error looks like an MinGW32 and wxWidgets bug. I am using MinGW32 TDM GCC version 4.7.1
Code: [Select]
libwxmsw31ud_core.a(corelib_msw_checklst.o): In function `ZN18wxCheckListBoxItem10OnDrawItemER4wxDCRK6wxRectN16wxOwnerDrawnBase10wxODActionENS5_10wxODStatusE':
C:\SourceCode\OpenSourceCode\VC_Repos\Libs\wx\wxWidgets-git\build\msw/../../src/msw/checklst.cpp:162: undefined reference to `[email protected]'

Now building wxWidgets 3.1.0 Static libs to see if the problem is new or old.
Edit: Looked at source code and the problem looks like a new wxWidgets and MinGW32 bug.
In other words, the final link error should NOT happen in wxWidgets version 3.1.0.
But, the link errors fixed by adding "version" and "shlwapi" will likely happen when using wxWidgets 3.1.0 and MinGW GCC.

Tim S.
Title: Re: Helloworld.cpp wxWidgets Working ?
Post by: chrismac on April 20, 2016, 11:50:45 am
helloworld.cpp -> http://docs.wxwidgets.org/trunk/overview_helloworld.html

I've moved to wxWidgets 2.8.12 (rather than 3.1.0) as 2.8.12 seems to work for others -> wxMSW-2.8.12-Setup.exe
and I'm trialling tdm-gcc-5.1.0-3.exe as it's developer seems to have confirmed it works with wx 2.8.12  -> re http://forums.codeblocks.org/index.php/topic,20382.0.html

Do others successfully use wxMSW-2.8.12-Setup.exe or wxWidgets-2.8.12.zip ?


// wxWidgets "Hello world" Program
// For compilers that support precompilation, includes "wx/wx.h".
#include <wx/wxprec.h>
#ifndef WX_PRECOMP
    #include <wx/wx.h>
#endif
class MyApp: public wxApp
{
public:
    virtual bool OnInit();
};
class MyFrame: public wxFrame
{
public:
    MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size);
private:
    void OnHello(wxCommandEvent& event);
    void OnExit(wxCommandEvent& event);
    void OnAbout(wxCommandEvent& event);
    wxDECLARE_EVENT_TABLE();
};
enum
{
    ID_Hello = 1
};
wxBEGIN_EVENT_TABLE(MyFrame, wxFrame)
    EVT_MENU(ID_Hello,   MyFrame::OnHello)
    EVT_MENU(wxID_EXIT,  MyFrame::OnExit)
    EVT_MENU(wxID_ABOUT, MyFrame::OnAbout)
wxEND_EVENT_TABLE()
wxIMPLEMENT_APP(MyApp);
bool MyApp::OnInit()
{
    MyFrame *frame = new MyFrame( "Hello World", wxPoint(50, 50), wxSize(450, 340) );
    frame->Show( true );
    return true;
}
MyFrame::MyFrame(const wxString& title, const wxPoint& pos, const wxSize& size)
        : wxFrame(NULL, wxID_ANY, title, pos, size)
{
    wxMenu *menuFile = new wxMenu;
    menuFile->Append(ID_Hello, "&Hello...\tCtrl-H",
                     "Help string shown in status bar for this menu item");
    menuFile->AppendSeparator();
    menuFile->Append(wxID_EXIT);
    wxMenu *menuHelp = new wxMenu;
    menuHelp->Append(wxID_ABOUT);
    wxMenuBar *menuBar = new wxMenuBar;
    menuBar->Append( menuFile, "&File" );
    menuBar->Append( menuHelp, "&Help" );
    SetMenuBar( menuBar );
    CreateStatusBar();
    SetStatusText( "Welcome to wxWidgets!" );
}
void MyFrame::OnExit(wxCommandEvent& event)
{
    Close( true );
}
void MyFrame::OnAbout(wxCommandEvent& event)
{
    wxMessageBox( "This is a wxWidgets' Hello world sample",
                  "About Hello World", wxOK | wxICON_INFORMATION );
}
void MyFrame::OnHello(wxCommandEvent& event)
{
    wxLogMessage("Hello world from wxWidgets!");
}
Title: Re: Helloworld.cpp wxWidgets Working ?
Post by: chrismac on April 20, 2016, 11:51:27 pm
Here's a tutorial that apparently gets wxWidgets in CB to work.

https://forums.wxwidgets.org/viewtopic.php?f=19&t=42121&p=170561#p170561
Title: Re: Helloworld.cpp wxWidgets Working ?
Post by: chrismac on April 22, 2016, 02:52:54 am
This thread details getting CB working using the latest wxWidgets 3.1.0 and using the CB MinGW32 compiler/linker to build the wxWidgets libraries and later to compile/link the HelloworldApp.cpp  , then run it using the monolithic dll that the Library build produces. It's been a bit of a learning curve, but now we have the latest and greatest for a monolithic library version. Static library build/linking to follow, if possible.

https://forums.wxwidgets.org/viewtopic.php?f=19&t=42121&p=170607#p170602