layout: post
title: "wxWidgets初探"
date: 2020-09-03
author: "王玉松"
header-img: ""
categories: C++
tags:

• C++
• wxWidgets
• Debian10

wxWidgets安装

添加软件安装源

# /etc/apt/sources.list
deb https://repos.codelite.org/wx3.1.4/debian/ buster libs

# 添加软件源后执行更新命令有可能出现由于没有公钥，无法验证下列签名
# 直接下载对应的公钥后即可继续执行命令
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys {公钥}

wxWidgets相应软件

参照官网上的指示, 我选择下载基于 GTK+2 的wxWidgets版本
(原因, 首先都是稳定版本, 其次使用目的仅是作为实训项目练习,
对于版本没有特殊的固定要求, 更专注于工具运用, 理解)

下载速度可能比较缓慢

apt-get install libwxbase3.1-0-unofficial \
                 libwxbase3.1-dev \
                 libwxgtk3.1-0-unofficial \
                 libwxgtk3.1-dev \
                 wx3.1gtk2-headers \
                 wx-common \
                 libwxgtk-media3.1-0-unofficial \
                 libwxgtk-media3.1-dev \
                 libwxbase3.1-0-unofficial-dbg \
                 libwxgtk3.1-0-unofficial-dbg \
                 libwxgtk-media3.1-0-unofficial-dbg \
                 wx3.1-i18n \
                 wx3.1-examples

实例程序

// 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

//继承 wxApp 类的用户自定义的应用类型
//其中只有一个public类型的虚函数
//有关虚函数的学习 
class MyApp: public wxApp
{
public:
    virtual bool OnInit();
};

//继承 wxFrame 类的用户自定义的窗格类型
//其中包含有构造函数和3个私有函数用于绑定事件
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!");
}

参考文章

1. wxWidgest官网

2. wxWidgets手册

3. Install wxWidgets-3.0.2 on GNU/Linux Debian

4. 由于没有公钥，无法验证下列签名