c++ - wxWidgets C++ - 在对话框中动态包装 wxStaticText

Question

我在使用 wxWidgets 3.0.2 使 wxStaticText 标签动态包装在对话框中时遇到问题。我遵循了其他问题的想法，例如 this one ，位我还有奇效。

我在 wxEVT_SIZE 事件的回调中对文本使用了 Wrap(int) 函数，但它似乎对文本产生了意想不到的影响，而且似乎只会“缩小”尺寸，并且不会随着窗口的扩大而再次换行。

绑定(bind)的主要部分是:

CTOR(...) {
    ....
    m_text->Bind(wxEVT_SIZE, &DIALOG_WRAPTEXT::onResize, this);
}

void CLASS::onResize( wxSizeEvent& event )
{
    m_text->Wrap( event.GetSize().GetWidth() );
    event.Skip();
}

第一次显示对话框时结果看起来不错，但是当你调整大小并返回时，你会得到这个结果:

一个最小可重现的例子是:

#include <wx/wxprec.h>
#ifndef WX_PRECOMP
    #include <wx/wx.h>
#endif
class DIALOG_WRAPTEXT: public wxDialog
{
public:

    DIALOG_WRAPTEXT( wxWindow* parent,
            const wxString& aTitle, const wxSize aSize );

private:

    void onResize( wxSizeEvent& evt );

    wxBoxSizer* m_itemBoxSizer;
    wxStaticText* m_text;
};

DIALOG_WRAPTEXT::DIALOG_WRAPTEXT(
        wxWindow* parent, const wxString& aTitle, const wxSize aSize ):
                    wxDialog( parent, wxID_ANY, aTitle,
                                 wxPoint( -1, -1 ), aSize,
                                 wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER)
{
    m_itemBoxSizer = new wxBoxSizer( wxVERTICAL );
    SetSizer( m_itemBoxSizer );

    wxString msg("Lots and lots of text to wrap hopefully. "
                "Lots and lots of text to wrap hopefully. "
                "Lots and lots of text to wrap hopefully. "
                "Lots and lots of text to wrap hopefully. "
                "Lots and lots of text to wrap hopefully. "
                "Lots and lots of text to wrap hopefully. "
                );

    m_text = new wxStaticText( this, wxID_ANY, msg );
    // wxEXPAND makes no difference
    m_itemBoxSizer->Add( m_text, 1, wxALIGN_TOP | wxALL | wxEXPAND, 5 );

    // Bind to m_text or this, same effect
    m_text->Bind(wxEVT_SIZE, &DIALOG_WRAPTEXT::onResize, this);

}

void DIALOG_WRAPTEXT::onResize( wxSizeEvent& event )
{
    //m_text->Freeze(); // makes no difference
    const auto w = event.GetSize().GetWidth();
    wxLogDebug( "Wrap to width: %d",w ); // produces sensible values
    m_text->Wrap( w );
    //m_text->Thaw();
    event.Skip();
}


class MyApp: public wxApp
{
public:

    bool OnInit() override
    {
        auto d = new DIALOG_WRAPTEXT(NULL, "Dialog title", wxSize(200, 200));

        d->ShowModal();
        d->Destroy();
    }
};

wxIMPLEMENT_APP(MyApp);

在对话框中动态包装静态文本的正确方法是什么？

Answer 1

在没有任何 wrap() 的情况下，wxStaticText 在 wx 3.0.2 的窗口上使用以下最小代码正确显示文本(在字边界处换行)。我可以调整对话框的大小(缩小、增大)并且 wxStaticText 会正确地自行更新。这对您的用例来说还不够吗？您确定需要使用 wrap 功能吗？

#include <wx/wxprec.h>
#ifndef WX_PRECOMP
#include <wx/wx.h>
#endif
class DIALOG_WRAPTEXT : public wxDialog
{
public:

    DIALOG_WRAPTEXT(wxWindow* parent,
        const wxString& aTitle, const wxSize aSize);

private:

    void onResize(wxSizeEvent& evt);

    wxBoxSizer* m_itemBoxSizer;
    wxStaticText* m_text;
};

DIALOG_WRAPTEXT::DIALOG_WRAPTEXT(
    wxWindow* parent, const wxString& aTitle, const wxSize aSize) :
    wxDialog(parent, wxID_ANY, aTitle,
        wxPoint(-1, -1), aSize,
        wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER)
{
    m_itemBoxSizer = new wxBoxSizer(wxVERTICAL);
    SetSizer(m_itemBoxSizer);

    wxString msg("Lots and lots of text to wrap hopefully. "
        "Lots and lots of text to wrap hopefully. "
        "Lots and lots of text to wrap hopefully. "
        "Lots and lots of text to wrap hopefully. "
        "Lots and lots of text to wrap hopefully. "
        "Lots and lots of text to wrap hopefully. "
    );

    m_text = new wxStaticText(this, wxID_ANY, msg);
    // wxEXPAND makes no difference
    m_itemBoxSizer->Add(m_text, 1, wxALIGN_TOP | wxALL | wxEXPAND, 5);

    // Act on dialog resize
    Bind(wxEVT_SIZE, &DIALOG_WRAPTEXT::onResize, this);

}

void DIALOG_WRAPTEXT::onResize(wxSizeEvent& event)
{
    // layout everything in the dialog
    Layout();
    event.Skip();
}


class MyApp : public wxApp
{
public:

    bool OnInit() override
    {
        auto d = new DIALOG_WRAPTEXT(NULL, "Dialog title", wxSize(200, 200));

        d->ShowModal();
        d->Destroy();

        return true;
    }
};

wxIMPLEMENT_APP(MyApp);