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window.cpp Example File
tools/customtypesending/window.cpp

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 #include <QtGui>
 #include "window.h"

 Window::Window()
 {
     editor = new QTextEdit();
     QPushButton *sendButton = new QPushButton(tr("&Send message"));

     connect(sendButton, SIGNAL(clicked()), this, SLOT(sendMessage()));

     QHBoxLayout *buttonLayout = new QHBoxLayout();
     buttonLayout->addStretch();
     buttonLayout->addWidget(sendButton);
     buttonLayout->addStretch();

     QVBoxLayout *layout = new QVBoxLayout(this);
     layout->addWidget(editor);
     layout->addLayout(buttonLayout);

     setWindowTitle(tr("Custom Type Sending"));
 }

 void Window::sendMessage()
 {
     thisMessage = Message(editor->toPlainText(), thisMessage.headers());
     emit messageSent(thisMessage);
 }

 void Window::setMessage(const Message &message)
 {
     thisMessage = message;
     editor->setPlainText(thisMessage.body());
 }