wxWidgets -在按钮单击时隐藏/显示`boxsizer`的内容

#include <wx/wx.h>

class MyFrame : public wxFrame
{
public:
    MyFrame() : wxFrame(NULL, wxID_ANY, "wxWidgets Example")
    {
        // 创建一个按钮
        wxButton* button = new wxButton(this, wxID_ANY, "Toggle BoxSizer");

        // 创建一个垂直的BoxSizer
        wxBoxSizer* boxSizer = new wxBoxSizer(wxVERTICAL);

        // 添加一些内容到BoxSizer中
        boxSizer->Add(new wxStaticText(this, wxID_ANY, "Content 1"), 0, wxALL, 10);
        boxSizer->Add(new wxStaticText(this, wxID_ANY, "Content 2"), 0, wxALL, 10);
        boxSizer->Add(new wxStaticText(this, wxID_ANY, "Content 3"), 0, wxALL, 10);

        // 设置窗口的主Sizer为BoxSizer
        SetSizer(boxSizer);

        // 绑定按钮的单击事件
        button->Bind(wxEVT_BUTTON, &MyFrame::OnButtonClick, this);
    }

    void OnButtonClick(wxCommandEvent& event)
    {
        // 获取窗口的主Sizer
        wxSizer* sizer = GetSizer();

        // 隐藏/显示BoxSizer的内容
        bool isVisible = sizer->IsShown(1); // 获取第二个子控件的可见性
        sizer->Show(1, !isVisible); // 切换可见性

        // 重新布局窗口
        sizer->Layout();
    }

private:
    wxDECLARE_EVENT_TABLE();
};

wxBEGIN_EVENT_TABLE(MyFrame, wxFrame)
    EVT_BUTTON(wxID_ANY, MyFrame::OnButtonClick)
wxEND_EVENT_TABLE()

class MyApp : public wxApp
{
public:
    virtual bool OnInit()
    {
        MyFrame* frame = new MyFrame();
        frame->Show();
        return true;
    }
};

wxIMPLEMENT_APP(MyApp);