Wxwidgets form login part 2. (Parent window is disabled after child window login success)

I previously wrote an article about wxWidget from login here https://imron02.wordpress.com/2014/09/26/c-simple-form-login-using-wxwidgets. And now I will create form login part 2. This application may be look like this:

And now this the source code. First create ChildWindow header:

/*
|-------------------------------------------------------------------------------
| Name:        ChildWindow.h
| Author:      Imron Rosdiana
| Modified by:
| Created:     2014-12-01
| Copyright:   (C) Copyright 2014, Imron Rosdiana
| Licence:     GPL (General Public License) V.3
*/

#ifndef CHILDWINDOW_H
#define CHILDWINDOW_H

#include <wx/wx.h>

class ChildWindow : public wxDialog
{
public:
	ChildWindow(wxWindow* parent, const wxString& title);

	// Destructor
	virtual ~ChildWindow();

private:
	wxStaticText* usernameLabel;
	wxStaticText* passwordLabel;
	wxTextCtrl* usernameEntry;
	wxTextCtrl* passwordEntry;
	wxButton* buttonLogin;
	wxButton* buttonQuit;

	// for check user is logged in or no
	bool logged_in = false;

private:
	void OnQuit(wxCommandEvent& WXUNUSED(event));
	void OnLogin(wxCommandEvent& WXUNUSED(event));
	void OnClose(wxCloseEvent& event);

private:
	wxDECLARE_EVENT_TABLE();

	enum
	{
		BUTTON_Login = wxID_HIGHEST + 1
	};
};
#endif // CHILDWINDOW_H

Explanation:
Look at the code on line 19, I create wxDialog with parent not null and using const wxString& title. So for what this code?

The intent of the code is I create wxDialog with have parent window (in this tutorial parent window for wxDialog is wxFrame and I create wxDialog with manually add title frame). So to implement/show ChildWindow, the code could would be like this:

ChildWindow* childWindow = new ChildWindow(wxFrame, "Child Window");

And then this is ChildWindow source:

/*
|-------------------------------------------------------------------------------
| Name:        ChildWindow.cpp
| Author:      Imron Rosdiana
| Modified by:
| Created:     2014-12-01
| Copyright:   (C) Copyright 2014, Imron Rosdiana
| Licence:     GPL (General Public License) V.3
*/

#include "ChildWindow.h"

using namespace std;

ChildWindow::ChildWindow(wxWindow* parent, const wxString& title)
: wxDialog(parent, wxID_ANY, title, wxPoint(wxID_ANY, wxID_ANY), wxSize(340, 150))
{
	wxPanel* panel = new wxPanel(this, wxID_ANY);

	wxBoxSizer* vbox = new wxBoxSizer(wxVERTICAL);

	wxBoxSizer* hbox1 = new wxBoxSizer(wxHORIZONTAL);
	wxBoxSizer* hbox2 = new wxBoxSizer(wxHORIZONTAL);
	wxBoxSizer* hbox3 = new wxBoxSizer(wxHORIZONTAL);

	usernameLabel = new wxStaticText(panel, wxID_ANY, wxT("Username: "),
		wxDefaultPosition, wxSize(70, -1));
	passwordLabel = new wxStaticText(panel, wxID_ANY, wxT("Password: "),
		wxDefaultPosition, wxSize(70, -1));
	usernameEntry = new wxTextCtrl(panel, wxID_ANY);
	passwordEntry = new wxTextCtrl(panel, wxID_ANY, wxString(""),
		wxDefaultPosition, wxDefaultSize, wxTE_PASSWORD);
	buttonLogin = new wxButton(panel, BUTTON_Login, wxT("Login"));
	buttonQuit = new wxButton(panel, wxID_EXIT, ("Quit"));

	hbox1->Add(usernameLabel, 0);
	hbox1->Add(usernameEntry, 1);
	hbox2->Add(passwordLabel, 0);
	hbox2->Add(passwordEntry, 1);
	hbox3->Add(buttonLogin);
	hbox3->Add(buttonQuit);

	vbox->Add(hbox1, 0, wxEXPAND | wxLEFT | wxRIGHT | wxTOP, 10);
	vbox->Add(hbox2, 1, wxEXPAND | wxLEFT | wxTOP | wxRIGHT, 10);
	vbox->Add(hbox3, 2, wxALIGN_RIGHT | wxTOP | wxRIGHT | wxBOTTOM, 10);

	// if user click close button window
	Bind(wxEVT_CLOSE_WINDOW, wxCloseEventHandler(ChildWindow::OnClose), this);

	panel->SetSizer(vbox);
	CenterOnParent();
	Centre();
}

wxBEGIN_EVENT_TABLE(ChildWindow, wxDialog)
EVT_BUTTON(wxID_EXIT, ChildWindow::OnQuit)
EVT_BUTTON(BUTTON_Login, ChildWindow::OnLogin)
wxEND_EVENT_TABLE()

void ChildWindow::OnQuit(wxCommandEvent& WXUNUSED(event))
{
	Destroy();
	Close(true);
}

void ChildWindow::OnLogin(wxCommandEvent& WXUNUSED(event))
{
	wxString username = usernameEntry->GetValue();
	wxString password = passwordEntry->GetValue();

	if (username.empty() || password.empty()) {
		wxMessageBox(wxT("Username atau password tidak boleh kosong"),
			wxT("Peringatan!"), wxICON_WARNING);
	}
	else {
		if (username == "admin" && password == "password") {
			// user is logged in and destroy form login
			logged_in = true;
			Destroy();
		}
		else {
			wxMessageBox(wxT("Username or Password incorrect."), wxT("Warning"), wxICON_WARNING);
		}
	}
}

void ChildWindow::OnClose(wxCloseEvent& event)
{
	if (!logged_in)
		//  close parent frame also if user not logged in
		GetParent()->Close();
	GetParent()->Enable();
	event.Skip();
}

ChildWindow::~ChildWindow() {}

Explanations:

1. Line 48 is used if user click close button in window frame and call function void ChildWindow::OnClose on line 87.
2. Line 51 is for display ChildWindow centered on MainWindow
3. Line 62 is used if user click button quit, so the modal will destroyed. Reference on this http://docs.wxwidgets.org/trunk/classwx_dialog.html
4. Line 78 and 79 is user if user success logged in, so the form login (child window) will be destroyed and the parent window (main window) will be active/not disabled again.
5. Line 87-94 is used if user not logged in (line 89) so the parent will be closed if user click close button, if not, the parent will be enabled and event is skipped

Then now create MainWindow header:

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <wx/wx.h>
#include <iostream>

class MainWindow : public wxFrame
{
public:
	MainWindow(const wxString& title);

	// Destructor
	virtual ~MainWindow();

private:
	wxStaticText* driveLabel;
};

#endif // MAINWINDOW_H

Explanation: Line 10 is used for main window with title is insert in showing function. The code may look like this:

MainWindow* mainWindow = new MainWindow("This is the title")

And this is the source of MainWindow:

#include "MainWindow.h"

using namespace std;

MainWindow::MainWindow(const wxString& title)
: wxFrame(NULL, wxID_Any, title, wxDefaultPosition, wxSize(400, 350), wxDEFAULT_FRAME_STYLE | wxSUNKEN_BORDER)
{
	wxPanel* panel = new wxPanel(this, -1);
	wxBoxSizer* vbox = new wxBoxSizer(wxVERTICAL);
	wxBoxSizer* hbox1 = new wxBoxSizer(wxHORIZONTAL);

	driveLabel = new wxStaticText(panel, wxID_ANY, wxT("Success Login"),
		wxDefaultPosition, wxSize(80, -1));
	vbox->Add(driveLabel, 0, wxALIGN_CENTER | wxTOP, 10);

	panel->SetSizer(vbox);

	Centre();
}

MainWindow::~MainWindow() {}

Explanation: Look at line 6, this code different with ChildWindow.cpp. In ChildWindow the code look like this:

ChildWindow::ChildWindow(wxWindow* parent, const wxString& title) : wxDialog(parent, wxID_ANY......

But in MainWindow look like this:

MainWindow::MainWindow(const wxString& title) : wxFrame(NULL, wxID_ANY,....

Look the code wxWindow* parent and wxDialog(parent, in code ChildWindow and MainWindow(const wxString& title) and wxFrame(NULL in MainWindow. So the mean’s in ChildWindow I create with the parent is not null and the MainWindow I create the parent with NULL.
So for implement both code (ChildWindow and MainWindow), the main header is:

#ifndef MAIN_H
#define MAIN_H

#include <wx/wx.h>

class Main : public wxApp
{
public:
	virtual bool OnInit();
};

#endif // MAIN_H

And the source code is:

#include "Main.h"
#include "MainWindow.h"
#include "ChildWindow.h"

bool Main::OnInit()
{
	MainWindow* mainWindow = new MainWindow(wxT("Main Window"));
	mainWindow->Show(true);
	ChildWindow* childWindow = new ChildWindow(mainWindow, "Child Window");
	childWindow->ShowModal();

	return true;
}

wxIMPLEMENT_APP(Main);

Explanations:

1. Line 7-9 is already be explained
2. Line 10 is used for showing the modal because I use wxDialog as modal

Note:

Username and password is “Admin” and “Password” without quotation. And this is a code reimplementation from python code http://stackoverflow.com/a/26616375
And now run the program. Some screenshoots:

Fig.1 – User input wrong username or password

Fig.2 – Logged in success.

Source Code:

http://www.mediafire.com/download/slggoq7n34dqeo6/Tutorial.7z