notecontent.cpp

我用QT写的记事本程序

#include "notecontent.h"
#include <QtGui/QTextEdit>
noteContent::noteContent(QWidget *parent)
: QTextEdit(parent)//QWidget(parent)
{
	//ui.setupUi(this);
	QTextEdit *mainedit = new QTextEdit;		
}

noteContent::~noteContent()
{

}

bool noteContent::isModified()
{
	return document()->isModified();
}
bool noteContent::writeFile(const QString &fileName)
{
	QFile file(fileName);
	if (!file.open(QIODevice::WriteOnly)) {
		QMessageBox::warning(this, tr("Spreadsheet"),
			tr("Cannot write file %1:\n%2.")
			.arg(file.fileName())
			.arg(file.errorString()));
		return false;
	}

	QDataStream out(&file);
	out.setVersion(QDataStream::Qt_4_3);

	out << quint32(0x7F51C883);

	QApplication::setOverrideCursor(Qt::WaitCursor);
/*
	for (int row = 0; row < RowCount; ++row) {
		for (int column = 0; column < ColumnCount; ++column) {
			QString str = formula(row, column);
			if (!str.isEmpty())
				out << quint16(row) << quint16(column) << str;
		}
	}*/
	QString str = toPlainText();
	out<<str;
	QApplication::restoreOverrideCursor();
	return true;
}
bool noteContent::readFile(const QString &fileName)
{
	QFile file(fileName);
	if (!file.open(QIODevice::ReadOnly)) {
		QMessageBox::warning(this, tr("Spreadsheet"),
			tr("Cannot read file %1:\n%2.")
			.arg(file.fileName())
			.arg(file.errorString()));
		return false;
	}

	QDataStream in(&file);
	in.setVersion(QDataStream::Qt_4_3);

	quint32 magic;
	in >> magic;
	if (magic != 0x7F51C883) {
		QMessageBox::warning(this, tr("Spreadsheet"),
			tr("The file is not a Spreadsheet file."));
		return false;
	}

	clear();

	QString str;

	in >> str;
	setText(str);
		
	QApplication::restoreOverrideCursor();
	return true;
}
void noteContent::del()
{
	QString strsel = textCursor().selectedText();
	QString str = toPlainText();
//	int i = str.find( QRegExp(strsel), 0 );
	//str = str-strsel;
	setText(str);
}