c++ 为什么当我按照说明操作时wxWidgets会出错？

polhcujo  于 2023-01-06  发布在  其他
关注(0)|答案(1)|浏览(77)

我在Ubuntu 20.04中使用CodeBlocks 20.03和wxWidgets 3.1来跟踪WxSmith的Hello World tutorial。后来证实这也发生在使用相同CodeBlocks和wxWidgets的Windows 10中。我一直在工作到现在：
搜索边框大小并将其从5更改为0。
到目前为止，Resource视图如下所示：

继续：
由于我们还将使用sizer来管理添加到wxPanel中的项，因此我们必须重复向wxPanel中添加wxBoxSize，在sizer就位后，切换回调色板上的Standard选项卡并添加一个wxStaticText控件。
我所理解的是，我必须在wxPanel对象中添加另一个wxBoxsizer，并在其中放入一个wxStaticText对象，然后使用gear按钮构建代码，这不会产生错误，然后使用play按钮运行代码，它会抛出一个错误：

我想问一下我做错了什么，这个video没有wxBoxSizer的外层，它还能用。

我想问一下我做错了什么，我怎样才能让它按照教程工作？
进一步搜索网络显示有人在9年多以前遇到过这个问题here。这是我的失败代码：

/***************************************************************
 * Name:      testMain.cpp
 * Purpose:   Code for Application Frame
 * Author:     ()
 * Created:   2022-12-27
 * Copyright:  ()
 * License:
 **************************************************************/

#include "wx_pch.h"
#include "testMain.h"
#include <wx/msgdlg.h>

//(*InternalHeaders(testFrame)
#include <wx/intl.h>
#include <wx/string.h>
//*)

//helper functions
enum wxbuildinfoformat {
    short_f, long_f };

wxString wxbuildinfo(wxbuildinfoformat format)
{
    wxString wxbuild(wxVERSION_STRING);

    if (format == long_f )
    {
#if defined(__WXMSW__)
        wxbuild << _T("-Windows");
#elif defined(__UNIX__)
        wxbuild << _T("-Linux");
#endif

#if wxUSE_UNICODE
        wxbuild << _T("-Unicode build");
#else
        wxbuild << _T("-ANSI build");
#endif // wxUSE_UNICODE
    }

    return wxbuild;
}

//(*IdInit(testFrame)
const long testFrame::ID_STATICTEXT1 = wxNewId();
const long testFrame::ID_BUTTON1 = wxNewId();
const long testFrame::ID_PANEL1 = wxNewId();
const long testFrame::idMenuQuit = wxNewId();
const long testFrame::idMenuAbout = wxNewId();
const long testFrame::ID_STATUSBAR1 = wxNewId();
//*)

BEGIN_EVENT_TABLE(testFrame,wxFrame)
    //(*EventTable(testFrame)
    //*)
END_EVENT_TABLE()

testFrame::testFrame(wxWindow* parent,wxWindowID id)
{
    //(*Initialize(testFrame)
    wxBoxSizer* BoxSizer1;
    wxBoxSizer* BoxSizer2;
    wxMenu* Menu1;
    wxMenu* Menu2;
    wxMenuBar* MenuBar1;
    wxMenuItem* MenuItem1;
    wxMenuItem* MenuItem2;

    Create(parent, id, wxEmptyString, wxDefaultPosition, wxDefaultSize, wxDEFAULT_FRAME_STYLE, _T("id"));
    BoxSizer1 = new wxBoxSizer(wxHORIZONTAL);
    Panel1 = new wxPanel(this, ID_PANEL1, wxDefaultPosition, wxSize(960,320), wxTAB_TRAVERSAL, _T("ID_PANEL1"));
    BoxSizer2 = new wxBoxSizer(wxHORIZONTAL);
    StaticText1 = new wxStaticText(Panel1, ID_STATICTEXT1, _("Label"), wxDefaultPosition, wxSize(120,60), 0, _T("ID_STATICTEXT1"));
    BoxSizer2->Add(StaticText1, 1, wxALL|wxALIGN_CENTER_HORIZONTAL|wxALIGN_CENTER_VERTICAL, 5);
    Button1 = new wxButton(Panel1, ID_BUTTON1, _("Label"), wxDefaultPosition, wxDefaultSize, 0, wxDefaultValidator, _T("ID_BUTTON1"));
    BoxSizer2->Add(Button1, 1, wxALL|wxALIGN_CENTER_HORIZONTAL|wxALIGN_CENTER_VERTICAL, 5);
    Panel1->SetSizer(BoxSizer2);
    SetSizer(BoxSizer2);
    Layout();
    BoxSizer1->Add(Panel1, 1, wxALL|wxALIGN_CENTER_HORIZONTAL|wxALIGN_CENTER_VERTICAL, 5);
    SetSizer(BoxSizer1);
    MenuBar1 = new wxMenuBar();
    Menu1 = new wxMenu();
    MenuItem1 = new wxMenuItem(Menu1, idMenuQuit, _("Quit\tAlt-F4"), _("Quit the application"), wxITEM_NORMAL);
    Menu1->Append(MenuItem1);
    MenuBar1->Append(Menu1, _("&File"));
    Menu2 = new wxMenu();
    MenuItem2 = new wxMenuItem(Menu2, idMenuAbout, _("About\tF1"), _("Show info about this application"), wxITEM_NORMAL);
    Menu2->Append(MenuItem2);
    MenuBar1->Append(Menu2, _("Help"));
    SetMenuBar(MenuBar1);
    StatusBar1 = new wxStatusBar(this, ID_STATUSBAR1, 0, _T("ID_STATUSBAR1"));
    int __wxStatusBarWidths_1[1] = { -1 };
    int __wxStatusBarStyles_1[1] = { wxSB_NORMAL };
    StatusBar1->SetFieldsCount(1,__wxStatusBarWidths_1);
    StatusBar1->SetStatusStyles(1,__wxStatusBarStyles_1);
    SetStatusBar(StatusBar1);
    BoxSizer1->Fit(this);
    BoxSizer1->SetSizeHints(this);

    Connect(idMenuQuit,wxEVT_COMMAND_MENU_SELECTED,(wxObjectEventFunction)&testFrame::OnQuit);
    Connect(idMenuAbout,wxEVT_COMMAND_MENU_SELECTED,(wxObjectEventFunction)&testFrame::OnAbout);
    //*)
}

testFrame::~testFrame()
{
    //(*Destroy(testFrame)
    //*)
}

void testFrame::OnQuit(wxCommandEvent& event)
{
    Close();
}

void testFrame::OnAbout(wxCommandEvent& event)
{
    wxString msg = wxbuildinfo(long_f);
    wxMessageBox(msg, _("Welcome to..."));
}

这是这个链接的工作代码：

#include "wx_pch.h"
#include "testMain.h"
#include <wx/msgdlg.h>

//(*InternalHeaders(testFrame)
#include <wx/intl.h>
#include <wx/string.h>
//*)

//helper functions
enum wxbuildinfoformat {
    short_f, long_f };

wxString wxbuildinfo(wxbuildinfoformat format)
{
    wxString wxbuild(wxVERSION_STRING);

    if (format == long_f )
    {
#if defined(__WXMSW__)
        wxbuild << _T("-Windows");
#elif defined(__UNIX__)
        wxbuild << _T("-Linux");
#endif

#if wxUSE_UNICODE
        wxbuild << _T("-Unicode build");
#else
        wxbuild << _T("-ANSI build");
#endif // wxUSE_UNICODE
    }

    return wxbuild;
}

//(*IdInit(testFrame)
const long testFrame::ID_STATICTEXT1 = wxNewId();
const long testFrame::ID_BUTTON1 = wxNewId();
const long testFrame::ID_PANEL1 = wxNewId();
const long testFrame::idMenuQuit = wxNewId();
const long testFrame::idMenuAbout = wxNewId();
const long testFrame::ID_STATUSBAR1 = wxNewId();
//*)

BEGIN_EVENT_TABLE(testFrame,wxFrame)
    //(*EventTable(testFrame)
    //*)
END_EVENT_TABLE()

testFrame::testFrame(wxWindow* parent,wxWindowID id)
{
    //(*Initialize(testFrame)
    wxBoxSizer* BoxSizer1;
    wxBoxSizer* BoxSizer2;
    wxMenu* Menu1;
    wxMenu* Menu2;
    wxMenuBar* MenuBar1;
    wxMenuItem* MenuItem1;
    wxMenuItem* MenuItem2;

    Create(parent, id, wxEmptyString, wxDefaultPosition, wxDefaultSize, wxDEFAULT_FRAME_STYLE, _T("id"));
    SetClientSize(wxSize(491,450));
    BoxSizer1 = new wxBoxSizer(wxHORIZONTAL);
    Panel1 = new wxPanel(this, ID_PANEL1, wxDefaultPosition, wxDefaultSize, wxTAB_TRAVERSAL, _T("ID_PANEL1"));
    BoxSizer2 = new wxBoxSizer(wxHORIZONTAL);
    StaticText1 = new wxStaticText(Panel1, ID_STATICTEXT1, _("Label"), wxDefaultPosition, wxDefaultSize, 0, _T("ID_STATICTEXT1"));
    BoxSizer2->Add(StaticText1, 1, wxALL|wxALIGN_CENTER_HORIZONTAL|wxALIGN_CENTER_VERTICAL, 5);
    Button1 = new wxButton(Panel1, ID_BUTTON1, _("Label"), wxDefaultPosition, wxDefaultSize, 0, wxDefaultValidator, _T("ID_BUTTON1"));
    BoxSizer2->Add(Button1, 1, wxALL|wxALIGN_CENTER_HORIZONTAL|wxALIGN_CENTER_VERTICAL, 5);
    Panel1->SetSizer(BoxSizer2);
    BoxSizer2->Fit(Panel1);
    BoxSizer2->SetSizeHints(Panel1);
    BoxSizer1->Add(Panel1, 1, wxALL|wxALIGN_CENTER_HORIZONTAL|wxALIGN_CENTER_VERTICAL, 5);
    SetSizer(BoxSizer1);
    MenuBar1 = new wxMenuBar();
    Menu1 = new wxMenu();
    MenuItem1 = new wxMenuItem(Menu1, idMenuQuit, _("Quit\tAlt-F4"), _("Quit the application"), wxITEM_NORMAL);
    Menu1->Append(MenuItem1);
    MenuBar1->Append(Menu1, _("&File"));
    Menu2 = new wxMenu();
    MenuItem2 = new wxMenuItem(Menu2, idMenuAbout, _("About\tF1"), _("Show info about this application"), wxITEM_NORMAL);
    Menu2->Append(MenuItem2);
    MenuBar1->Append(Menu2, _("Help"));
    SetMenuBar(MenuBar1);
    StatusBar1 = new wxStatusBar(this, ID_STATUSBAR1, 0, _T("ID_STATUSBAR1"));
    int __wxStatusBarWidths_1[1] = { -1 };
    int __wxStatusBarStyles_1[1] = { wxSB_NORMAL };
    StatusBar1->SetFieldsCount(1,__wxStatusBarWidths_1);
    StatusBar1->SetStatusStyles(1,__wxStatusBarStyles_1);
    SetStatusBar(StatusBar1);
    SetSizer(BoxSizer1);
    Layout();

    Connect(idMenuQuit,wxEVT_COMMAND_MENU_SELECTED,(wxObjectEventFunction)&testFrame::OnQuit);
    Connect(idMenuAbout,wxEVT_COMMAND_MENU_SELECTED,(wxObjectEventFunction)&testFrame::OnAbout);
    //*)
}

testFrame::~testFrame()
{
    //(*Destroy(testFrame)
    //*)
}

void testFrame::OnQuit(wxCommandEvent& event)
{
    Close();
}

void testFrame::OnAbout(wxCommandEvent& event)
{
    wxString msg = wxbuildinfo(long_f);
    wxMessageBox(msg, _("Welcome to..."));
}

比较两者，问题的根源来自这4行代码（右边的工作代码）：

注解掉左边的4行代码，然后复制右边的代码，代码就可以工作了。现在看来，这些代码设置了元素之间的关系。有人能解释一下它们的含义吗（对与错），以及我能做些什么来获得正确的生成？我尽我所能按照指示操作，显然有些地方做得不对。工作代码的图形布局和我的一样。只是生成的代码在关键的地方不同。我找不到任何更详细的视频或说明，可以帮助把它放在第一位。

c++

1条答案

按热度按时间
i5desfxk

i5desfxk1#

添加第一个swBoxSizer和wxPanel后，预览窗口中显示如下：

这个小对象促使我设置wxPanel对象的大小，使其可见并易于操作。然而，这触发了生成的代码的变化。面板的大小不再是wxDefaultSize，而是wxSize(960,320)，如上面的失败代码所示。为了避免这种情况，我必须使用Insert new widgets into current selection工具，如下所示：

然后，依次添加另一个swBoxSizer和swStaticText。最后使用原始Insert new widget by pointing with mouse工具添加swButton。

下面是生成的工作代码：

#include "wx_pch.h"
#include "testMain.h"
#include <wx/msgdlg.h>

//(*InternalHeaders(testFrame)
#include <wx/intl.h>
#include <wx/string.h>
//*)

//helper functions
enum wxbuildinfoformat {
    short_f, long_f };

wxString wxbuildinfo(wxbuildinfoformat format)
{
    wxString wxbuild(wxVERSION_STRING);

    if (format == long_f )
    {
#if defined(__WXMSW__)
        wxbuild << _T("-Windows");
#elif defined(__UNIX__)
        wxbuild << _T("-Linux");
#endif

#if wxUSE_UNICODE
        wxbuild << _T("-Unicode build");
#else
        wxbuild << _T("-ANSI build");
#endif // wxUSE_UNICODE
    }

    return wxbuild;
}

//(*IdInit(testFrame)
const long testFrame::ID_STATICTEXT1 = wxNewId();
const long testFrame::ID_BUTTON1 = wxNewId();
const long testFrame::ID_PANEL1 = wxNewId();
const long testFrame::idMenuQuit = wxNewId();
const long testFrame::idMenuAbout = wxNewId();
const long testFrame::ID_STATUSBAR1 = wxNewId();
//*)

BEGIN_EVENT_TABLE(testFrame,wxFrame)
    //(*EventTable(testFrame)
    //*)
END_EVENT_TABLE()

testFrame::testFrame(wxWindow* parent,wxWindowID id)
{
    //(*Initialize(testFrame)
    wxBoxSizer* BoxSizer1;
    wxBoxSizer* BoxSizer2;
    wxMenu* Menu1;
    wxMenu* Menu2;
    wxMenuBar* MenuBar1;
    wxMenuItem* MenuItem1;
    wxMenuItem* MenuItem2;

    Create(parent, id, wxEmptyString, wxDefaultPosition, wxDefaultSize, wxDEFAULT_FRAME_STYLE, _T("id"));
    BoxSizer1 = new wxBoxSizer(wxHORIZONTAL);
    Panel1 = new wxPanel(this, ID_PANEL1, wxDefaultPosition, wxDefaultSize, wxTAB_TRAVERSAL, _T("ID_PANEL1"));
    BoxSizer2 = new wxBoxSizer(wxHORIZONTAL);
    StaticText1 = new wxStaticText(Panel1, ID_STATICTEXT1, _("Label"), wxDefaultPosition, wxDefaultSize, 0, _T("ID_STATICTEXT1"));
    BoxSizer2->Add(StaticText1, 1, wxALL|wxALIGN_CENTER_HORIZONTAL|wxALIGN_CENTER_VERTICAL, 5);
    Button1 = new wxButton(Panel1, ID_BUTTON1, _("Label"), wxDefaultPosition, wxDefaultSize, 0, wxDefaultValidator, _T("ID_BUTTON1"));
    BoxSizer2->Add(Button1, 1, wxALL|wxALIGN_CENTER_HORIZONTAL|wxALIGN_CENTER_VERTICAL, 5);
    Panel1->SetSizer(BoxSizer2);
    BoxSizer2->Fit(Panel1);
    BoxSizer2->SetSizeHints(Panel1);
    BoxSizer1->Add(Panel1, 1, wxALL|wxALIGN_CENTER_HORIZONTAL|wxALIGN_CENTER_VERTICAL, 5);
    SetSizer(BoxSizer1);
    MenuBar1 = new wxMenuBar();
    Menu1 = new wxMenu();
    MenuItem1 = new wxMenuItem(Menu1, idMenuQuit, _("Quit\tAlt-F4"), _("Quit the application"), wxITEM_NORMAL);
    Menu1->Append(MenuItem1);
    MenuBar1->Append(Menu1, _("&File"));
    Menu2 = new wxMenu();
    MenuItem2 = new wxMenuItem(Menu2, idMenuAbout, _("About\tF1"), _("Show info about this application"), wxITEM_NORMAL);
    Menu2->Append(MenuItem2);
    MenuBar1->Append(Menu2, _("Help"));
    SetMenuBar(MenuBar1);
    StatusBar1 = new wxStatusBar(this, ID_STATUSBAR1, 0, _T("ID_STATUSBAR1"));
    int __wxStatusBarWidths_1[1] = { -1 };
    int __wxStatusBarStyles_1[1] = { wxSB_NORMAL };
    StatusBar1->SetFieldsCount(1,__wxStatusBarWidths_1);
    StatusBar1->SetStatusStyles(1,__wxStatusBarStyles_1);
    SetStatusBar(StatusBar1);
    BoxSizer1->Fit(this);
    BoxSizer1->SetSizeHints(this);

    Connect(idMenuQuit,wxEVT_COMMAND_MENU_SELECTED,(wxObjectEventFunction)&testFrame::OnQuit);
    Connect(idMenuAbout,wxEVT_COMMAND_MENU_SELECTED,(wxObjectEventFunction)&testFrame::OnAbout);
    //*)
}

testFrame::~testFrame()
{
    //(*Destroy(testFrame)
    //*)
}

void testFrame::OnQuit(wxCommandEvent& event)
{
    Close();
}

void testFrame::OnAbout(wxCommandEvent& event)
{
    wxString msg = wxbuildinfo(long_f);
    wxMessageBox(msg, _("Welcome to..."));
}

这是一个让初学者不愿学习框架的陷阱，我希望这对任何找到这篇文章的人都有帮助。

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