Sito Appunti di informatica by Carlo (Privacy)
Esempio di programma C++ con librerie wxWidgets
(Aggiornamento dell'articolo al 27/10/2024)
Ora che avete compilato la libreria wxWidgets e scaricato il materiale per compilare i programmi con tale libreria, potete provare questo programma in C++ con wxWidgets.
Il programma si chiama "Rettangolo" e serve per calcolare appunto perimetro e area di tale figura geometrica; in questa pagina vi sono i codici sorgenti.
Si presenta come la figura a destra, per chi usa il computer o sopra, per chi usa lo smartphone.
Se si possiede un computer con uno schermo ad alta risoluzione (4K o superiore), è opportuno aggiungere nella cartella dei sorgenti anche il file di risorse "rettangolo.rc":
// rettangolo.rc
// APPLICAZIONE Rettangolo
// di Carlo Sala
// 05/09/2024
//
#define wxUSE_NO_MANIFEST 0
#define wxUSE_DPI_AWARE_MANIFEST 2
#if !defined(__llvm__)
#include "wx/msw/wx.rc"
#endif
Codici sorgentiScarica qui!
///////////////////////////////////////////////////////////////////////////
// Name: gui.cpp
// C++ code generated with wxFormBuilder (version Nov 5 2013)
// http://www.wxformbuilder.org/
// Author: Sala Carlo - 05/09/2024
///////////////////////////////////////////////////////////////////////////
#include "gui.h"
///////////////////////////////////////////////////////////////////////////
MainFrameBase::MainFrameBase( wxWindow* parent, wxWindowID id, const wxString& title, const wxPoint& pos, const wxSize& size, long style ) : wxFrame( parent, id, title, pos, size, style )
{
wxArrayString includeList;
includeList.Add(wxT("0"));
includeList.Add(wxT("1"));
includeList.Add(wxT("2"));
includeList.Add(wxT("3"));
includeList.Add(wxT("4"));
includeList.Add(wxT("5"));
includeList.Add(wxT("6"));
includeList.Add(wxT("7"));
includeList.Add(wxT("8"));
includeList.Add(wxT("9"));
wxTextValidator textValidator(wxFILTER_INCLUDE_CHAR_LIST);
textValidator.SetIncludes(includeList);
this->SetSize(FromDIP(wxSize (400,355)));
this->SetSizeHints( wxDefaultSize, wxDefaultSize );
this->SetBackgroundColour( wxColour( 180, 180, 180 ) );
wxBoxSizer* bSizer1;
bSizer1 = new wxBoxSizer( wxVERTICAL );
m_panel1 = new wxPanel( this, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxTAB_TRAVERSAL );
wxBoxSizer* bSizer2;
bSizer2 = new wxBoxSizer( wxVERTICAL );
wxBoxSizer* bSizer3;
bSizer3 = new wxBoxSizer( wxVERTICAL );
m_staticText1 = new wxStaticText( m_panel1, wxID_ANY, _T("Area e perimetro del rettangolo"), wxDefaultPosition, wxDefaultSize, wxALIGN_CENTRE );
m_staticText1->Wrap( -1 );
m_staticText1->SetFont(wxFontInfo(16).FaceName("Arial").Italic().Bold());
m_staticText1->SetForegroundColour( wxColour( 32, 54, 210 ) );
bSizer3->Add( m_staticText1, 0, wxALL|wxEXPAND|wxLEFT|wxRIGHT, 5 );
m_staticText2 = new wxStaticText( m_panel1, wxID_ANY, _T("(Possibilità di inserire anche i decimali !!)"), wxDefaultPosition, wxDefaultSize, wxALIGN_CENTRE );
m_staticText2->Wrap( -1 );
m_staticText2->SetFont(wxFontInfo(9).FaceName("Arial").Italic().Bold());
bSizer3->Add( m_staticText2, 0, wxALL|wxEXPAND|wxLEFT|wxRIGHT|wxTOP, 5 );
bSizer2->Add( bSizer3, 1, wxEXPAND, 5 );
bSizer2->Add( 0, 0, 1, wxEXPAND, 5 );
wxBoxSizer* bSizer4;
bSizer4 = new wxBoxSizer( wxHORIZONTAL );
m_staticText3 = new wxStaticText( m_panel1, wxID_ANY, _T("Base:"), wxDefaultPosition, FromDIP(wxSize(122, -1)), 0 );
m_staticText3->Wrap( -1 );
m_staticText3->SetFont(wxFontInfo(9).FaceName("Arial"));
bSizer4->Add( m_staticText3, 0, wxALL, 5 );
m_textCtrl1 = new wxTextCtrl( m_panel1, wxID_ANY, wxEmptyString, wxDefaultPosition, FromDIP(wxSize(60, -1)), 0|wxWANTS_CHARS,textValidator );
m_textCtrl1->SetMaxLength( 3 );
m_textCtrl1->SetFont(wxFontInfo(9).FaceName("Arial").Bold());
bSizer4->Add( m_textCtrl1, 0, wxEXPAND, 5 );
m_staticText4 = new wxStaticText( m_panel1, wxID_ANY, _(","), wxDefaultPosition, wxDefaultSize, 0 );
m_staticText4->Wrap( -1 );
m_staticText4->SetFont(wxFontInfo(9).FaceName("Arial"));
bSizer4->Add( m_staticText4, 0, wxALL, 5 );
m_textCtrl2 = new wxTextCtrl( m_panel1, wxID_ANY, wxEmptyString, wxDefaultPosition, FromDIP(wxSize(35, -1)), 0|wxWANTS_CHARS,textValidator );
m_textCtrl2->SetMaxLength( 2 );
m_textCtrl2->SetFont(wxFontInfo(9).FaceName("Arial").Bold());
bSizer4->Add( m_textCtrl2, 0, wxEXPAND, 5 );
bSizer2->Add( bSizer4, 0, wxBOTTOM|wxEXPAND|wxTOP, 5 );
wxBoxSizer* bSizer6;
bSizer6 = new wxBoxSizer( wxHORIZONTAL );
m_staticText5 = new wxStaticText( m_panel1, wxID_ANY, _T("Altezza:"), wxDefaultPosition, FromDIP(wxSize(122, -1)), 0 );
m_staticText5->Wrap( -1 );
m_staticText5->SetFont(wxFontInfo(9).FaceName("Arial"));
bSizer6->Add( m_staticText5, 0, wxALL, 5 );
m_textCtrl3 = new wxTextCtrl( m_panel1, wxID_ANY, wxEmptyString, wxDefaultPosition, FromDIP(wxSize(60, -1)), 0|wxWANTS_CHARS,textValidator );
m_textCtrl3->SetMaxLength( 3 );
m_textCtrl3->SetFont(wxFontInfo(9).FaceName("Arial").Bold());
bSizer6->Add( m_textCtrl3, 0, wxEXPAND, 5 );
m_staticText6 = new wxStaticText( m_panel1, wxID_ANY, _(","), wxDefaultPosition, wxDefaultSize, 0 );
m_staticText6->Wrap( -1 );
m_staticText6->SetFont(wxFontInfo(9).FaceName("Arial"));
bSizer6->Add( m_staticText6, 0, wxALL, 5 );
m_textCtrl4 = new wxTextCtrl( m_panel1, wxID_ANY, wxEmptyString, wxDefaultPosition, FromDIP(wxSize(35, -1)), 0|wxWANTS_CHARS,textValidator );
m_textCtrl4->SetMaxLength( 2 );
m_textCtrl4->SetFont(wxFontInfo(9).FaceName("Arial").Bold());
bSizer6->Add( m_textCtrl4, 0, wxEXPAND, 5 );
bSizer2->Add( bSizer6, 0, wxBOTTOM|wxEXPAND, 5 );
bSizer2->Add( 0, 0, 1, wxEXPAND, 5 );
wxBoxSizer* bSizer7;
bSizer7 = new wxBoxSizer( wxHORIZONTAL );
m_button1 = new wxButton( m_panel1, wxID_ANY, _T("Calcola !!"), wxDefaultPosition, FromDIP(wxSize(122, -1)), 0 );
bSizer7->Add( m_button1, 0, wxLEFT, 5 );
bSizer2->Add( bSizer7, 0, wxTOP|wxBOTTOM|wxEXPAND, 5 );
bSizer2->Add( 0, 0, 1, wxEXPAND, 5 );
wxBoxSizer* bSizer8;
bSizer8 = new wxBoxSizer( wxHORIZONTAL );
m_staticText7 = new wxStaticText( m_panel1, wxID_ANY, _T("Area del rettangolo:"), wxDefaultPosition, FromDIP(wxSize(258, -1)), 0 );
m_staticText7->Wrap( -1 );
m_staticText7->SetFont(wxFontInfo(9).FaceName("Arial"));
bSizer8->Add( m_staticText7, 0, wxLEFT, 5 );
m_staticText8 = new wxStaticText( m_panel1, wxID_ANY, wxEmptyString, wxDefaultPosition, FromDIP(wxSize(142, -1)), 0);
m_staticText8->Wrap( -1 );
m_staticText8->SetFont(wxFontInfo(12).FaceName("Arial").Bold());
m_staticText8->SetForegroundColour(wxColour(3,7,253));
m_staticText8->SetBackgroundColour( wxColour( 251, 220, 108 ) );
bSizer8->Add( m_staticText8, 0, wxRIGHT, 5 );
bSizer2->Add( bSizer8, 0, wxEXPAND|wxTOP|wxBOTTOM, 5 );
wxBoxSizer* bSizer9;
bSizer9 = new wxBoxSizer( wxHORIZONTAL );
m_staticText9 = new wxStaticText( m_panel1, wxID_ANY, _T("Perimetro del rettangolo:"), wxDefaultPosition, FromDIP(wxSize(258, -1)), 0 );
m_staticText9->SetFont(wxFontInfo(9).FaceName("Arial"));
m_staticText9->Wrap( -1 );
bSizer9->Add( m_staticText9, 0, wxLEFT, 5 );
m_staticText10 = new wxStaticText( m_panel1, wxID_ANY, wxEmptyString, wxDefaultPosition, FromDIP(wxSize(142, -1)), 0);
m_staticText10->Wrap( -1 );
m_staticText10->SetFont(wxFontInfo(12).FaceName("Arial").Bold());
m_staticText10->SetForegroundColour( wxColour(3,7,253));
m_staticText10->SetBackgroundColour( wxColour( 251, 220, 108 ) );
bSizer9->Add( m_staticText10, 0, wxRIGHT, 5 );
bSizer2->Add( bSizer9, 0, wxEXPAND|wxTOP|wxBOTTOM, 5 );
bSizer2->Add( 0, 0, 1, wxEXPAND, 5 );
wxBoxSizer* bSizer10;
bSizer10 = new wxBoxSizer( wxVERTICAL );
bSizer10->Add( 0, 0, 1, wxEXPAND, 5 );
m_statusBar = this->CreateStatusBar( 1, wxST_SIZEGRIP, wxID_ANY );
m_hyperlink1 = new wxGenericHyperlinkCtrl( m_panel1, wxID_ANY, _T("© Carlo Sala software"), wxT("https://www.carlosala.net/"), wxDefaultPosition, wxDefaultSize, wxHL_DEFAULT_STYLE );
m_statusBar->PushStatusText(" V.: 1.0.0");
m_hyperlink1->SetHoverColour( wxColour( 32, 54, 210 ) );
m_hyperlink1->SetNormalColour( wxColour( 64, 64, 64 ) );
m_hyperlink1->SetVisitedColour( wxColour( 64, 64, 64 ) );
bSizer10->Add( m_hyperlink1, 0, wxALIGN_RIGHT|wxBOTTOM|wxRIGHT, 10 );
bSizer2->Add( bSizer10, 1, wxEXPAND, 5 );
m_panel1->SetSizer( bSizer2 );
m_panel1->Layout();
bSizer1->Add( m_panel1, 1, wxEXPAND|wxALL, 5 );
this->SetSizer( bSizer1 );
this->Layout();
this->Centre( wxBOTH );
// Connect Events
this->Connect( wxEVT_CLOSE_WINDOW, wxCloseEventHandler( MainFrameBase::OnCloseApp ) );
m_button1->Connect( wxEVT_COMMAND_BUTTON_CLICKED, wxCommandEventHandler( MainFrameBase::OnClickCalcola ), NULL, this );
}
MainFrameBase::~MainFrameBase()
{
// Disconnect Events
this->Disconnect( wxEVT_CLOSE_WINDOW, wxCloseEventHandler( MainFrameBase::OnCloseApp ) );
m_button1->Disconnect( wxEVT_COMMAND_BUTTON_CLICKED, wxCommandEventHandler( MainFrameBase::OnClickCalcola ), NULL, this );
}
///////////////////////////////////////////////////////////////////////////
// Name: gui.h
// C++ code generated with wxFormBuilder (version Nov 5 2013)
// http://www.wxformbuilder.org/
// Author: Sala Carlo - 05/09/2024
///////////////////////////////////////////////////////////////////////////
#ifndef __GUI_H__
#define __GUI_H__
#include <wx/panel.h>
#include <wx/hyperlink.h>
#include <wx/button.h>
#include <wx/textctrl.h>
#include <wx/stattext.h>
#include <wx/artprov.h>
#include <wx/xrc/xmlres.h>
#include <wx/intl.h>
#include <wx/string.h>
#include <wx/bitmap.h>
#include <wx/image.h>
#include <wx/icon.h>
#include <wx/menu.h>
#include <wx/gdicmn.h>
#include <wx/font.h>
#include <wx/colour.h>
#include <wx/settings.h>
#include <wx/sizer.h>
#include <wx/statusbr.h>
#include <wx/frame.h>
#include <wx/valtext.h>
#include <wx/listctrl.h>
///////////////////////////////////////////////////////////////////////////////
/// Class MainFrameBase
///////////////////////////////////////////////////////////////////////////////
class MainFrameBase : public wxFrame
{
private:
protected:
wxPanel* m_panel1;
wxStaticText* m_staticText1;
wxStaticText* m_staticText2;
wxStaticText* m_staticText3;
wxTextCtrl* m_textCtrl1;
wxStaticText* m_staticText4;
wxTextCtrl* m_textCtrl2;
wxStaticText* m_staticText5;
wxTextCtrl* m_textCtrl3;
wxStaticText* m_staticText6;
wxTextCtrl* m_textCtrl4;
wxButton* m_button1;
wxStaticText* m_staticText7;
wxStaticText* m_staticText8;
wxStaticText* m_staticText9;
wxStaticText* m_staticText10;
wxGenericHyperlinkCtrl* m_hyperlink1;
wxStatusBar* m_statusBar;
virtual void OnCloseApp( wxCloseEvent& event ) { event.Skip(); }
virtual void OnClickCalcola( wxCommandEvent& event ) { event.Skip(); }
public:
MainFrameBase( wxWindow* parent, wxWindowID id = wxID_ANY, const wxString& title = " Calcolo dell' area e del perimetro del rettangolo", const wxPoint& pos = wxDefaultPosition, const wxSize& size = wxDefaultSize, long style = wxCAPTION|wxCLOSE_BOX|wxMINIMIZE_BOX|wxSYSTEM_MENU|wxTAB_TRAVERSAL );
~MainFrameBase();
};
///////////////////////////////////////////////////////////////////////////////
/// Class Rettangolo
///////////////////////////////////////////////////////////////////////////////
class Rettangolo
{
public:
double b, h;
double area()
{
return b*h;
}
double perimetro()
{
return 2*(b+h);
}
};
#endif //__GUI_H__
/*********************************************************************
* Name: main.cpp
* Purpose: Implements simple wxWidgets application with GUI
* created using wxFormBuilder.
* Author: Sala Carlo
* Created: 05/09/2024
*********************************************************************/
#include "main.h"
// initialize the application
IMPLEMENT_APP(MainApp);
////////////////////////////////////////////////////////////////////////////////
// application class implementation
////////////////////////////////////////////////////////////////////////////////
bool MainApp::OnInit()
{
SetTopWindow( new MainFrame( NULL ) );
GetTopWindow()->Show();
// true = enter the main loop
return true;
}
////////////////////////////////////////////////////////////////////////////////
// main application frame implementation
////////////////////////////////////////////////////////////////////////////////
MainFrame::MainFrame(wxWindow *parent) : MainFrameBase( parent )
{
}
MainFrame::~MainFrame()
{
}
void MainFrame::OnCloseApp( wxCloseEvent& event)
{
Destroy();
}
void MainFrame::OnClickCalcola( wxCommandEvent& event)
{
char risultato[5] ="";
double base = 0;
double altezza = 0;
m_staticText8->SetLabel("");
m_staticText10->SetLabel("");
base = atof(m_textCtrl1->GetValue()+"."+ m_textCtrl2->GetValue());
altezza = atof(m_textCtrl3->GetValue()+"."+ m_textCtrl4->GetValue());
if(base == 0.00 || base < 0.00 || altezza == 0.00 || altezza < 0.00) {
wxMessageBox (_T("Valori non ammessi !!"),
_T("Avviso"), wxOK | wxICON_EXCLAMATION);
base =0;
altezza = 0;
} else {
Rettangolo rett;
rett.b = base;
rett.h = altezza;
sprintf(risultato ,"% 4.2f" , rett.area());
m_staticText8->SetLabel(risultato);
sprintf(risultato ,"% 4.2f" , rett.perimetro());
m_staticText10->SetLabel(risultato);
}
}
/*********************************************************************
* Name: main.h
* Purpose: Declares simple wxWidgets application with GUI
* created using wxFormBuilder.
* Author: Sala Carlo
* Created: 05/09/2024
*********************************************************************/
#ifndef __main__
#define __main__
// main wxWidgets header file
#include <wx/wx.h>;
// gui classes generated by wxFormBuilder
#include "gui.h"
////////////////////////////////////////////////////////////////////////////////
// application class declaration
////////////////////////////////////////////////////////////////////////////////
class MainApp : public wxApp
{
public:
virtual bool OnInit();
};
DECLARE_APP(MainApp)
////////////////////////////////////////////////////////////////////////////////
// main application frame declaration
////////////////////////////////////////////////////////////////////////////////
class MainFrame : public MainFrameBase
{
public:
//MainFrameBase prova
MainFrame( wxWindow *parent );
virtual ~MainFrame();
protected:
// protected event handlers
void OnCloseApp( wxCloseEvent& event );
void OnClickCalcola( wxCommandEvent& event );
};
#endif //__main__