QT VS C++ 2005, QPushButton NOT FIRING!!!!!

**harleyskater** · 11th June 2010, 19:26

I am new to QT and after not getting my button to fire, I tried lots of things!

where should I put this:

QObject::connect(LoginBtn, SIGNAL(clicked()), LoginBtn, SLOT(accept()));

and I doubt it should be button to button, but I am not sure how to point it to the class holding the function

**squidge** · 11th June 2010, 19:57

Have you tried :

Qt Code:

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QObject::connect(ui->LoginBtn, SIGNAL(clicked()), this, SLOT(accept()));

QObject::connect(ui->LoginBtn, SIGNAL(clicked()), this, SLOT(accept()));

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**harleyskater** · 11th June 2010, 20:32

yes I have tried that before, My attempt before was like this, I tried again and I got this set of errors. Though in my first attempt it was without the ui->LoginBtn, it was just LoginBtn

1>Compiling...
1>moc_thewge.cpp
1>.\GeneratedFiles\ui_thewge.h(72) : error C2065: 'ui' : undeclared identifier
1>.\GeneratedFiles\ui_thewge.h(72) : error C2227: left of '->LoginBtn' must point to class/struct/union/generic type
1> type is ''unknown-type''

Qt Code:

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/********************************************************************************
** Form generated from reading UI file 'thewge.ui'
**
** Created: Fri Jun 11 13:01:58 2010
**      by: Qt User Interface Compiler version 4.6.2
**
** WARNING! All changes made in this file will be lost when recompiling UI file!
********************************************************************************/
 
#ifndef UI_THEWGE_H
#define UI_THEWGE_H
 
#include <QtCore/QVariant>
#include <QtGui/QAction>
#include <QtGui/QApplication>
#include <QtGui/QButtonGroup>
#include <QtGui/QHeaderView>
#include <QtGui/QLineEdit>
#include <QtGui/QMainWindow>
#include <QtGui/QPushButton>
#include <QtGui/QWidget>
 
QT_BEGIN_NAMESPACE
 
class Ui_TheWGEClass
{
public:
    QWidget *centralWidget;
    QLineEdit *usrLineEdit;
    QLineEdit *pwdLineEdit;
    QPushButton *LoginBtn;
 
    void setupUi(QMainWindow *TheWGEClass)
    {
        if (TheWGEClass->objectName().isEmpty())
            TheWGEClass->setObjectName(QString::fromUtf8("TheWGEClass"));
        TheWGEClass->resize(649, 348);
        QSizePolicy sizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
        sizePolicy.setHorizontalStretch(0);
        sizePolicy.setVerticalStretch(0);
        sizePolicy.setHeightForWidth(TheWGEClass->sizePolicy().hasHeightForWidth());
        TheWGEClass->setSizePolicy(sizePolicy);
        TheWGEClass->setMinimumSize(QSize(649, 348));
        TheWGEClass->setMaximumSize(QSize(649, 348));
        TheWGEClass->setStyleSheet(QString::fromUtf8("background-image: url(:/TheWGE/gamers.PNG)"));
        centralWidget = new QWidget(TheWGEClass);
        centralWidget->setObjectName(QString::fromUtf8("centralWidget"));
        usrLineEdit = new QLineEdit(centralWidget);
        usrLineEdit->setObjectName(QString::fromUtf8("usrLineEdit"));
        usrLineEdit->setGeometry(QRect(270, 200, 170, 29));
        usrLineEdit->setMaximumSize(QSize(170, 29));
        usrLineEdit->setStyleSheet(QString::fromUtf8("background-image: url(:/TheWGE/textbox.PNG);\n"
"color: rgb(255, 255, 255);"));
        usrLineEdit->setMaxLength(40);
        usrLineEdit->setFrame(false);
        pwdLineEdit = new QLineEdit(centralWidget);
        pwdLineEdit->setObjectName(QString::fromUtf8("pwdLineEdit"));
        pwdLineEdit->setGeometry(QRect(270, 230, 170, 29));
        pwdLineEdit->setMaximumSize(QSize(170, 29));
        pwdLineEdit->setStyleSheet(QString::fromUtf8("background-image: url(:/TheWGE/textbox.PNG);\n"
"color: rgb(255, 255, 255);"));
        pwdLineEdit->setFrame(false);
        LoginBtn = new QPushButton(centralWidget);
        LoginBtn->setObjectName(QString::fromUtf8("LoginBtn"));
        LoginBtn->setGeometry(QRect(350, 270, 90, 31));
        LoginBtn->setStyleSheet(QString::fromUtf8("background-image: url(:/TheWGE/login.PNG)"));
        LoginBtn->setFlat(true);
        TheWGEClass->setCentralWidget(centralWidget);
 
        retranslateUi(TheWGEClass);
 
		QObject::connect(ui->LoginBtn, SIGNAL(clicked()), this, SLOT(accept()));
 
        QMetaObject::connectSlotsByName(TheWGEClass);
    } // setupUi
 
    void retranslateUi(QMainWindow *TheWGEClass)
    {
        TheWGEClass->setWindowTitle(QApplication::translate("TheWGEClass", "TheWGE Anti-Cheat Client", 0, QApplication::UnicodeUTF8));
        LoginBtn->setText(QString());
    } // retranslateUi
 
};
 
namespace Ui {
    class TheWGEClass: public Ui_TheWGEClass {};
} // namespace Ui
 
QT_END_NAMESPACE
 
#endif // UI_THEWGE_H

/********************************************************************************
** Form generated from reading UI file 'thewge.ui'
**
** Created: Fri Jun 11 13:01:58 2010
**      by: Qt User Interface Compiler version 4.6.2
**
** WARNING! All changes made in this file will be lost when recompiling UI file!
********************************************************************************/

#ifndef UI_THEWGE_H
#define UI_THEWGE_H

#include <QtCore/QVariant>
#include <QtGui/QAction>
#include <QtGui/QApplication>
#include <QtGui/QButtonGroup>
#include <QtGui/QHeaderView>
#include <QtGui/QLineEdit>
#include <QtGui/QMainWindow>
#include <QtGui/QPushButton>
#include <QtGui/QWidget>

QT_BEGIN_NAMESPACE

class Ui_TheWGEClass
{
public:
    QWidget *centralWidget;
    QLineEdit *usrLineEdit;
    QLineEdit *pwdLineEdit;
    QPushButton *LoginBtn;

    void setupUi(QMainWindow *TheWGEClass)
    {
        if (TheWGEClass->objectName().isEmpty())
            TheWGEClass->setObjectName(QString::fromUtf8("TheWGEClass"));
        TheWGEClass->resize(649, 348);
        QSizePolicy sizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
        sizePolicy.setHorizontalStretch(0);
        sizePolicy.setVerticalStretch(0);
        sizePolicy.setHeightForWidth(TheWGEClass->sizePolicy().hasHeightForWidth());
        TheWGEClass->setSizePolicy(sizePolicy);
        TheWGEClass->setMinimumSize(QSize(649, 348));
        TheWGEClass->setMaximumSize(QSize(649, 348));
        TheWGEClass->setStyleSheet(QString::fromUtf8("background-image: url(:/TheWGE/gamers.PNG)"));
        centralWidget = new QWidget(TheWGEClass);
        centralWidget->setObjectName(QString::fromUtf8("centralWidget"));
        usrLineEdit = new QLineEdit(centralWidget);
        usrLineEdit->setObjectName(QString::fromUtf8("usrLineEdit"));
        usrLineEdit->setGeometry(QRect(270, 200, 170, 29));
        usrLineEdit->setMaximumSize(QSize(170, 29));
        usrLineEdit->setStyleSheet(QString::fromUtf8("background-image: url(:/TheWGE/textbox.PNG);\n"
"color: rgb(255, 255, 255);"));
        usrLineEdit->setMaxLength(40);
        usrLineEdit->setFrame(false);
        pwdLineEdit = new QLineEdit(centralWidget);
        pwdLineEdit->setObjectName(QString::fromUtf8("pwdLineEdit"));
        pwdLineEdit->setGeometry(QRect(270, 230, 170, 29));
        pwdLineEdit->setMaximumSize(QSize(170, 29));
        pwdLineEdit->setStyleSheet(QString::fromUtf8("background-image: url(:/TheWGE/textbox.PNG);\n"
"color: rgb(255, 255, 255);"));
        pwdLineEdit->setFrame(false);
        LoginBtn = new QPushButton(centralWidget);
        LoginBtn->setObjectName(QString::fromUtf8("LoginBtn"));
        LoginBtn->setGeometry(QRect(350, 270, 90, 31));
        LoginBtn->setStyleSheet(QString::fromUtf8("background-image: url(:/TheWGE/login.PNG)"));
        LoginBtn->setFlat(true);
        TheWGEClass->setCentralWidget(centralWidget);

        retranslateUi(TheWGEClass);

		QObject::connect(ui->LoginBtn, SIGNAL(clicked()), this, SLOT(accept()));

        QMetaObject::connectSlotsByName(TheWGEClass);
    } // setupUi

    void retranslateUi(QMainWindow *TheWGEClass)
    {
        TheWGEClass->setWindowTitle(QApplication::translate("TheWGEClass", "TheWGE Anti-Cheat Client", 0, QApplication::UnicodeUTF8));
        LoginBtn->setText(QString());
    } // retranslateUi

};

namespace Ui {
    class TheWGEClass: public Ui_TheWGEClass {};
} // namespace Ui

QT_END_NAMESPACE

#endif // UI_THEWGE_H

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**squidge** · 11th June 2010, 21:11

Why are you modifying ui_thewge.h? That file is automatically generated so you will loose your changes! Do not edit that file!

**harleyskater** · 11th June 2010, 21:24

LOL, all of my posts on this thread have said that I don't know where to put the connect statement, it would be much easier if you just told me where it belongs

**wysota** · 11th June 2010, 21:36

Your problem has nothing to do with Qt, you know. It's pure lack of C++ skills. Sorry for being blunt but then you didn't have to SHOUT(!) in the first place and you could have used proper tags in your posts

**harleyskater** · 11th June 2010, 21:41

i've already built this, in managed code with .net forms in C++, but I want to get away from that with QT so my program will be more secure. I've only been programming C++ for a year, im no pro but Its not that I don't know C++. why can I put 6 posts in 1 thread with all my code asking why a button isn't firing and still have not gotten any real advice?

**wysota** · 11th June 2010, 22:00

Originally Posted by harleyskater

why can I put 6 posts in 1 thread with all my code asking why a button isn't firing and still have not gotten any real advice?

That's very simple to answer - because you didn't provide proper information in your first post. Each reply to each of your posts in this thread provides a proper answer to the problem stated in the previous post. First you asked why the application crashes and you were given the answer that it is because you had been using an uninitialized variable which was the proper answer to your question as your variables were obviously uninitialized. Of course after a year of C++ programming you should have noticed that yourself but ok... Then you stated you thought you had them initialized and posted a ui file (which you should have attached to your post instead of posting it inline with wrong bbcode, by the way) which was not that much relevant as the unitialized variable was the one in your widget class and not in the form. Fatjuicymole pointed out you had two sets of variables with the same names which again was the proper answer to your statement. Then you asked where you should put the connect statement connecting your uninitialized variable to something else. You were then given a good advice to use the variable from your ui class instead of the uninitialized variable. Then you said you had tried that before and it gave you some errors that you posted. The answer (again the right one) was that you placed it in a wrong place. Of course after programming in C++ for a year you should have noticed you didn't have a "ui" variable in this scope or you should have understood the clear message from the compiler you had been using for a year, but who am I to judge...

So to summarize, you had the following problem history:
1. you used an unexisting "ui" variable in a connect statement which gave you errors you didn't understand
2. you removed the offending line and instead made another mistake of declaring a variable of the same name in your widget class, forgetting to initialize it and using it in a connect statement
3. you were told you should have used the variable from the ui file which led you back to your original problem (or rather misled you as you just needed to add "ui->" to your statement and you simply misinterpreted it)
4. you told me you have little experience with C++ because you have been using it for only a year but you are used to .Net (meaning probably C#, which is also object oriented so you should have spotted both your problems as in C# they would be exactly the same) causing another headache and wondering why majority of problems on this forum recently is related to C++ and not Qt and thinking whether we should introduce some kind of "basic C++ knowledge" certification process for people registering on this forum.

I hope I clarified the situation. If not, let me know what is still unclear and we'll try to provide a better explanation.

**harleyskater** · 11th June 2010, 22:34

i've never worked with C# before, just managed C++ Form applications. I am working away from that because a recent program of mine was decompiled. I could use a fuscator but I read all these things about QT and crossplatforms the programs I am building will soon be needed for mac. It didn't take me any time to program this, but its taken me 3 days to program out this with QT and really my main problem is understanding how to access the UI. I read what you said and I still don't understand where my connect should go, I am guessing my thewge.h. I don't understand what you mean by needing the "ui->". I am just trying to take this project that I have already done, and make it into a project that uses QT.

Qt Code:

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#pragma once
 
#include <mysql++.h>
#include <windows.h>
#include <iostream>
#include "md5.h"
 
namespace wforms {
 
	using namespace System;
	using namespace System::ComponentModel;
	using namespace System::Collections;
	using namespace System::Windows::Forms;
	using namespace System::Data;
	using namespace System::Drawing;
 
	/// <summary>
	/// Summary for LoginForm
	/// </summary>
	public ref class LoginForm : public System::Windows::Forms::Form
	{
	public:
		LoginForm(void)
		{
			InitializeComponent();
			//
			//TODO: Add the constructor code here
			//
		}
 
	protected:
		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		~LoginForm()
		{
			if (components)
			{
				delete components;
			}
		}
	internal: System::Windows::Forms::Button^  Cancel;
	protected: 
	internal: System::Windows::Forms::Button^  OK;
	internal: System::Windows::Forms::TextBox^  PasswordTextBox;
	internal: System::Windows::Forms::TextBox^  UsernameTextBox;
	internal: System::Windows::Forms::Label^  PasswordLabel;
	internal: System::Windows::Forms::Label^  UsernameLabel;
	internal: System::Windows::Forms::PictureBox^  LogoPictureBox;
 
	private:
		/// <summary>
		/// Required designer variable.
		/// </summary>
		System::ComponentModel::Container ^components;
 
#pragma region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		void InitializeComponent(void)
		{
			System::ComponentModel::ComponentResourceManager^  resources = (gcnew System::ComponentModel::ComponentResourceManager(LoginForm::typeid));
			this->Cancel = (gcnew System::Windows::Forms::Button());
			this->OK = (gcnew System::Windows::Forms::Button());
			this->PasswordTextBox = (gcnew System::Windows::Forms::TextBox());
			this->UsernameTextBox = (gcnew System::Windows::Forms::TextBox());
			this->PasswordLabel = (gcnew System::Windows::Forms::Label());
			this->UsernameLabel = (gcnew System::Windows::Forms::Label());
			this->LogoPictureBox = (gcnew System::Windows::Forms::PictureBox());
			(cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->LogoPictureBox))->BeginInit();
			this->SuspendLayout();
			// 
			// Cancel
			// 
			this->Cancel->DialogResult = System::Windows::Forms::DialogResult::Cancel;
			this->Cancel->Location = System::Drawing::Point(313, 190);
			this->Cancel->Name = L"Cancel";
			this->Cancel->Size = System::Drawing::Size(94, 23);
			this->Cancel->TabIndex = 12;
			this->Cancel->Text = L"&Cancel";
			this->Cancel->Click += gcnew System::EventHandler(this, &LoginForm::Cancel_Click);
			// 
			// OK
			// 
			this->OK->Location = System::Drawing::Point(210, 190);
			this->OK->Name = L"OK";
			this->OK->Size = System::Drawing::Size(94, 23);
			this->OK->TabIndex = 11;
			this->OK->Text = L"&OK";
			this->OK->Click += gcnew System::EventHandler(this, &LoginForm::OK_Click);
			// 
			// PasswordTextBox
			// 
			this->PasswordTextBox->Location = System::Drawing::Point(187, 130);
			this->PasswordTextBox->Name = L"PasswordTextBox";
			this->PasswordTextBox->PasswordChar = '*';
			this->PasswordTextBox->Size = System::Drawing::Size(220, 20);
			this->PasswordTextBox->TabIndex = 10;
			// 
			// UsernameTextBox
			// 
			this->UsernameTextBox->Location = System::Drawing::Point(187, 73);
			this->UsernameTextBox->Name = L"UsernameTextBox";
			this->UsernameTextBox->Size = System::Drawing::Size(220, 20);
			this->UsernameTextBox->TabIndex = 8;
			// 
			// PasswordLabel
			// 
			this->PasswordLabel->Location = System::Drawing::Point(185, 110);
			this->PasswordLabel->Name = L"PasswordLabel";
			this->PasswordLabel->Size = System::Drawing::Size(220, 23);
			this->PasswordLabel->TabIndex = 9;
			this->PasswordLabel->Text = L"&Password";
			this->PasswordLabel->TextAlign = System::Drawing::ContentAlignment::MiddleLeft;
			// 
			// UsernameLabel
			// 
			this->UsernameLabel->Location = System::Drawing::Point(185, 53);
			this->UsernameLabel->Name = L"UsernameLabel";
			this->UsernameLabel->Size = System::Drawing::Size(220, 23);
			this->UsernameLabel->TabIndex = 6;
			this->UsernameLabel->Text = L"&User name";
			this->UsernameLabel->TextAlign = System::Drawing::ContentAlignment::MiddleLeft;
			// 
			// LogoPictureBox
			// 
			this->LogoPictureBox->Image = (cli::safe_cast<System::Drawing::Image^  >(resources->GetObject(L"LogoPictureBox.Image")));
			this->LogoPictureBox->Location = System::Drawing::Point(13, 69);
			this->LogoPictureBox->Name = L"LogoPictureBox";
			this->LogoPictureBox->Size = System::Drawing::Size(168, 81);
			this->LogoPictureBox->SizeMode = System::Windows::Forms::PictureBoxSizeMode::StretchImage;
			this->LogoPictureBox->TabIndex = 7;
			this->LogoPictureBox->TabStop = false;
			// 
			// LoginForm
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->ClientSize = System::Drawing::Size(421, 266);
			this->Controls->Add(this->Cancel);
			this->Controls->Add(this->OK);
			this->Controls->Add(this->PasswordTextBox);
			this->Controls->Add(this->UsernameTextBox);
			this->Controls->Add(this->PasswordLabel);
			this->Controls->Add(this->UsernameLabel);
			this->Controls->Add(this->LogoPictureBox);
			this->Name = L"LoginForm";
			this->Text = L"LoginForm";
			(cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->LogoPictureBox))->EndInit();
			this->ResumeLayout(false);
			this->PerformLayout();
 
		}
#pragma endregion
 
		// Takes a string in the .NET platform's native Unicode format and
		// copies it to the given C string buffer in UTF-8 encoding.
		Void ToUTF8(char* pcOut, int nOutLen, String^ sIn)
		{
			array<Byte>^ bytes = System::Text::Encoding::UTF8->GetBytes(sIn);
			nOutLen = Math::Min(nOutLen - 1, bytes->Length);
			System::Runtime::InteropServices::Marshal::Copy(bytes, 0, 
				IntPtr(pcOut), nOutLen);
			pcOut[nOutLen] = '\0';
		}
 
 
	private: System::Void OK_Click(System::Object^  sender, System::EventArgs^  e) 
			 {
 
 
				mysqlpp::Connection con(false);
 
				if (!con.connect("db", "server", "thewge", "password")) 
				{
				Application::Exit();
				}
 
				// Retrieve a subset of the sample stock table set up by resetdb
				mysqlpp::Query query = con.query();
				//query << "SELECT username, password FROM wge_db_user WHERE username = 'da*beast'";
 
				const int kInputBufSize = 100;
				char acsUserName[kInputBufSize];
				char acsPassword[kInputBufSize];
 
				ToUTF8(acsUserName, kInputBufSize, UsernameTextBox->Text);
				ToUTF8(acsPassword, kInputBufSize, PasswordTextBox->Text);
 
				//md5(acsPassword);
 
				query << "SELECT username, password FROM wge_db_user WHERE username = '" << acsUserName << "' and password = '" << md5(acsPassword) << "'";
 
				mysqlpp::StoreQueryResult res = query.store();
				mysqlpp::Row row;
 
 
				if (res.num_rows() > 0)
				{
					//goodlogin - show new form and hide this form
				}
				else
				{
					//badlogin
				} 
 
				mysqlpp::Connection::thread_end();
 
 
				return;
 
 
			 }
private: System::Void Cancel_Click(System::Object^  sender, System::EventArgs^  e) 
		 {
			 Application::Exit();
		 }
};
 
}

#pragma once

#include <mysql++.h>
#include <windows.h>
#include <iostream>
#include "md5.h"

namespace wforms {

	using namespace System;
	using namespace System::ComponentModel;
	using namespace System::Collections;
	using namespace System::Windows::Forms;
	using namespace System::Data;
	using namespace System::Drawing;

	/// <summary>
	/// Summary for LoginForm
	/// </summary>
	public ref class LoginForm : public System::Windows::Forms::Form
	{
	public:
		LoginForm(void)
		{
			InitializeComponent();
			//
			//TODO: Add the constructor code here
			//
		}

	protected:
		/// <summary>
		/// Clean up any resources being used.
		/// </summary>
		~LoginForm()
		{
			if (components)
			{
				delete components;
			}
		}
	internal: System::Windows::Forms::Button^  Cancel;
	protected: 
	internal: System::Windows::Forms::Button^  OK;
	internal: System::Windows::Forms::TextBox^  PasswordTextBox;
	internal: System::Windows::Forms::TextBox^  UsernameTextBox;
	internal: System::Windows::Forms::Label^  PasswordLabel;
	internal: System::Windows::Forms::Label^  UsernameLabel;
	internal: System::Windows::Forms::PictureBox^  LogoPictureBox;

	private:
		/// <summary>
		/// Required designer variable.
		/// </summary>
		System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		void InitializeComponent(void)
		{
			System::ComponentModel::ComponentResourceManager^  resources = (gcnew System::ComponentModel::ComponentResourceManager(LoginForm::typeid));
			this->Cancel = (gcnew System::Windows::Forms::Button());
			this->OK = (gcnew System::Windows::Forms::Button());
			this->PasswordTextBox = (gcnew System::Windows::Forms::TextBox());
			this->UsernameTextBox = (gcnew System::Windows::Forms::TextBox());
			this->PasswordLabel = (gcnew System::Windows::Forms::Label());
			this->UsernameLabel = (gcnew System::Windows::Forms::Label());
			this->LogoPictureBox = (gcnew System::Windows::Forms::PictureBox());
			(cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->LogoPictureBox))->BeginInit();
			this->SuspendLayout();
			// 
			// Cancel
			// 
			this->Cancel->DialogResult = System::Windows::Forms::DialogResult::Cancel;
			this->Cancel->Location = System::Drawing::Point(313, 190);
			this->Cancel->Name = L"Cancel";
			this->Cancel->Size = System::Drawing::Size(94, 23);
			this->Cancel->TabIndex = 12;
			this->Cancel->Text = L"&Cancel";
			this->Cancel->Click += gcnew System::EventHandler(this, &LoginForm::Cancel_Click);
			// 
			// OK
			// 
			this->OK->Location = System::Drawing::Point(210, 190);
			this->OK->Name = L"OK";
			this->OK->Size = System::Drawing::Size(94, 23);
			this->OK->TabIndex = 11;
			this->OK->Text = L"&OK";
			this->OK->Click += gcnew System::EventHandler(this, &LoginForm::OK_Click);
			// 
			// PasswordTextBox
			// 
			this->PasswordTextBox->Location = System::Drawing::Point(187, 130);
			this->PasswordTextBox->Name = L"PasswordTextBox";
			this->PasswordTextBox->PasswordChar = '*';
			this->PasswordTextBox->Size = System::Drawing::Size(220, 20);
			this->PasswordTextBox->TabIndex = 10;
			// 
			// UsernameTextBox
			// 
			this->UsernameTextBox->Location = System::Drawing::Point(187, 73);
			this->UsernameTextBox->Name = L"UsernameTextBox";
			this->UsernameTextBox->Size = System::Drawing::Size(220, 20);
			this->UsernameTextBox->TabIndex = 8;
			// 
			// PasswordLabel
			// 
			this->PasswordLabel->Location = System::Drawing::Point(185, 110);
			this->PasswordLabel->Name = L"PasswordLabel";
			this->PasswordLabel->Size = System::Drawing::Size(220, 23);
			this->PasswordLabel->TabIndex = 9;
			this->PasswordLabel->Text = L"&Password";
			this->PasswordLabel->TextAlign = System::Drawing::ContentAlignment::MiddleLeft;
			// 
			// UsernameLabel
			// 
			this->UsernameLabel->Location = System::Drawing::Point(185, 53);
			this->UsernameLabel->Name = L"UsernameLabel";
			this->UsernameLabel->Size = System::Drawing::Size(220, 23);
			this->UsernameLabel->TabIndex = 6;
			this->UsernameLabel->Text = L"&User name";
			this->UsernameLabel->TextAlign = System::Drawing::ContentAlignment::MiddleLeft;
			// 
			// LogoPictureBox
			// 
			this->LogoPictureBox->Image = (cli::safe_cast<System::Drawing::Image^  >(resources->GetObject(L"LogoPictureBox.Image")));
			this->LogoPictureBox->Location = System::Drawing::Point(13, 69);
			this->LogoPictureBox->Name = L"LogoPictureBox";
			this->LogoPictureBox->Size = System::Drawing::Size(168, 81);
			this->LogoPictureBox->SizeMode = System::Windows::Forms::PictureBoxSizeMode::StretchImage;
			this->LogoPictureBox->TabIndex = 7;
			this->LogoPictureBox->TabStop = false;
			// 
			// LoginForm
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->ClientSize = System::Drawing::Size(421, 266);
			this->Controls->Add(this->Cancel);
			this->Controls->Add(this->OK);
			this->Controls->Add(this->PasswordTextBox);
			this->Controls->Add(this->UsernameTextBox);
			this->Controls->Add(this->PasswordLabel);
			this->Controls->Add(this->UsernameLabel);
			this->Controls->Add(this->LogoPictureBox);
			this->Name = L"LoginForm";
			this->Text = L"LoginForm";
			(cli::safe_cast<System::ComponentModel::ISupportInitialize^  >(this->LogoPictureBox))->EndInit();
			this->ResumeLayout(false);
			this->PerformLayout();

		}
#pragma endregion

		// Takes a string in the .NET platform's native Unicode format and
		// copies it to the given C string buffer in UTF-8 encoding.
		Void ToUTF8(char* pcOut, int nOutLen, String^ sIn)
		{
			array<Byte>^ bytes = System::Text::Encoding::UTF8->GetBytes(sIn);
			nOutLen = Math::Min(nOutLen - 1, bytes->Length);
			System::Runtime::InteropServices::Marshal::Copy(bytes, 0, 
				IntPtr(pcOut), nOutLen);
			pcOut[nOutLen] = '\0';
		}


	private: System::Void OK_Click(System::Object^  sender, System::EventArgs^  e) 
			 {


				mysqlpp::Connection con(false);
		
				if (!con.connect("db", "server", "thewge", "password")) 
				{
				Application::Exit();
				}

				// Retrieve a subset of the sample stock table set up by resetdb
				mysqlpp::Query query = con.query();
				//query << "SELECT username, password FROM wge_db_user WHERE username = 'da*beast'";

				const int kInputBufSize = 100;
				char acsUserName[kInputBufSize];
				char acsPassword[kInputBufSize];

				ToUTF8(acsUserName, kInputBufSize, UsernameTextBox->Text);
				ToUTF8(acsPassword, kInputBufSize, PasswordTextBox->Text);

				//md5(acsPassword);

				query << "SELECT username, password FROM wge_db_user WHERE username = '" << acsUserName << "' and password = '" << md5(acsPassword) << "'";

				mysqlpp::StoreQueryResult res = query.store();
				mysqlpp::Row row;


				if (res.num_rows() > 0)
				{
					//goodlogin - show new form and hide this form
				}
				else
				{
					//badlogin
				} 

				mysqlpp::Connection::thread_end();

				
				return;


			 }
private: System::Void Cancel_Click(System::Object^  sender, System::EventArgs^  e) 
		 {
			 Application::Exit();
		 }
};

}

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the things are throwing me off is the generated file and talking and connecting from other forms to the QT GUI

where should my connect code go, what should it look like and what is the steps needed to get it connected to a function.

I just came here for help, I thought this would be a simple question and answer because its just a button click event..............

**wysota** · 11th June 2010, 22:59

Originally Posted by harleyskater

i've never worked with C# before, just managed C++ Form applications.

Whatever - still object oriented.

I am working away from that because a recent program of mine was decompiled.

Every C++ application can be decompiled and disassembled.

I read what you said and I still don't understand where my connect should go,

It should be in the constructor of your widget class.

I don't understand what you mean by needing the "ui->"

You are familiar with the "->" operator in C++, right?

the things are throwing me off is the generated file and talking and connecting from other forms to the QT GUI

So don't generate any files, write everything manually. Nobody forces you to use ui files.

I just came here for help, I thought this would be a simple question and answer because its just a button click event..............

But your problem has really nothing to do with any buttons. It's a simple C++ issue of accessing an uninitialized (in one case) or non-existing (in the other case) variable.

**squidge** · 11th June 2010, 23:18

You had it in the right place the first time. No one told you to move that statement to another file, which is why when I told you the correct way to use the connect method it didn't work for you. I was (and still am) puzzled why you changed the file, and then when I say you got the wrong file you start complaining that no one is giving you real advice.

Sheesh. It's a wonder anyone helps you.

**harleyskater** · 12th June 2010, 00:23

juicy, I just realized why this was giving me so many problems, it was actually firing, but my breaks in my code were not stopping the debug : / I am guessing there something between QT and MSVC that isn't great for debugging. thxfor your help

**wysota** · 11th June 2010, 23:22

Just to correct what I said earlier - I just noticed "ui" was not a pointer in your code (I'm answering too many threads at the same time :P) so it should be "ui." and not "ui->". The rest still stands.

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