#include <QtGui>
#include "collection.h"
#include <QTextEdit>
#include <QTextStream>
#include <QCloseEvent>
#include <QFileDialog>
#include <QApplication>
// #include <QGraphicsScene>
#include <QGraphicsView>
collection::collection()
{
textEdit = new QTextEdit;
setCentralWidget(textEdit);
createActions();
createMenus();
createToolBars();
createStatusBar();
readSettings();
connect(textEdit->document(), SIGNAL(contentsChanged()),
this, SLOT(documentWasModified()));
//mousePressEvent ( )
setCurrentFile("");
}
void collection::closeEvent(QCloseEvent *event)
{
if (maybeSave()) {
writeSettings();
event->accept();
} else {
event->ignore();
}
}
void collection::newFile()
{
if (maybeSave()) {
textEdit->clear();
setCurrentFile("");
}
}
void collection::open()
{
if (maybeSave()) {
QString fileName = QFileDialog::getOpenFileName(this);
if (!fileName.isEmpty())
loadFile(fileName);
}
}
bool collection::save()
{
if (curFile.isEmpty()) {
return saveAs();
} else {
return saveFile(curFile);
}
}
bool collection::saveAs()
{
QString fileName = QFileDialog::getSaveFileName(this);
if (fileName.isEmpty())
return false;
return saveFile(fileName);
}
void collection::about()
{
QMessageBox::about(this, tr("About Application"),
tr("The <b>Application</b> example demonstrates how to "
"write modern GUI applications using Qt, with a menu bar, "
"toolbars, and a status bar."));
}
void collection::documentWasModified()
{
setWindowModified(true);
}
void collection::createActions()
{
newAct = new QAction(QIcon(":/filenew.xpm"), tr("&New"), this);
newAct->setShortcut(tr("Ctrl+N"));
newAct->setStatusTip(tr("Create a new file"));
connect(newAct, SIGNAL(triggered()), this, SLOT(newFile()));
openAct = new QAction(QIcon(":/fileopen.xpm"), tr("&Open..."), this);
openAct->setShortcut(tr("Ctrl+O"));
openAct->setStatusTip(tr("Open an existing file"));
connect(openAct, SIGNAL(triggered()), this, SLOT(open()));
saveAct = new QAction(QIcon(":/filesave.xpm"), tr("&Save"), this);
saveAct->setShortcut(tr("Ctrl+S"));
saveAct->setStatusTip(tr("Save the document to disk"));
connect(saveAct, SIGNAL(triggered()), this, SLOT(save()));
saveAsAct = new QAction(tr("Save &As..."), this);
saveAsAct->setStatusTip(tr("Save the document under a new name"));
connect(saveAsAct, SIGNAL(triggered()), this, SLOT(saveAs()));
exitAct = new QAction(tr("E&xit"), this);
exitAct->setShortcut(tr("Ctrl+Q"));
exitAct->setStatusTip(tr("Exit the application"));
connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));
cutAct = new QAction(QIcon(":/editcut.xpm"), tr("Cu&t"), this);
cutAct->setShortcut(tr("Ctrl+X"));
cutAct->setStatusTip(tr("Cut the current selection's contents to the "
"clipboard"));
connect(cutAct, SIGNAL(triggered()), textEdit, SLOT(cut()));
copyAct = new QAction(QIcon(":/editcopy.xpm"), tr("&Copy"), this);
copyAct->setShortcut(tr("Ctrl+C"));
copyAct->setStatusTip(tr("Copy the current selection's contents to the "
"clipboard"));
connect(copyAct, SIGNAL(triggered()), textEdit, SLOT(copy()));
pasteAct = new QAction(QIcon(":/editpaste.xpm"), tr("&Paste"), this);
pasteAct->setShortcut(tr("Ctrl+V"));
pasteAct->setStatusTip(tr("Paste the clipboard's contents into the current "
"selection"));
connect(pasteAct, SIGNAL(triggered()), textEdit, SLOT(paste()));
aboutAct = new QAction(tr("&About"), this);
aboutAct->setStatusTip(tr("Show the application's About box"));
connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
aboutQtAct = new QAction(tr("About &Qt"), this);
aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
cutAct->setEnabled(false);
copyAct->setEnabled(false);
connect(textEdit, SIGNAL(copyAvailable(bool)),
cutAct, SLOT(setEnabled(bool)));
connect(textEdit, SIGNAL(copyAvailable(bool)),
copyAct, SLOT(setEnabled(bool)));
}
void collection::createMenus()
{
fileMenu = menuBar()->addMenu(tr("&File"));
fileMenu->addAction(newAct);
fileMenu->addAction(openAct);
fileMenu->addAction(saveAct);
fileMenu->addAction(saveAsAct);
fileMenu->addSeparator();
fileMenu->addAction(exitAct);
editMenu = menuBar()->addMenu(tr("&Edit"));
editMenu->addAction(cutAct);
editMenu->addAction(copyAct);
editMenu->addAction(pasteAct);
menuBar()->addSeparator();
helpMenu = menuBar()->addMenu(tr("&Help"));
helpMenu->addAction(aboutAct);
helpMenu->addAction(aboutQtAct);
}
void collection::createToolBars()
{
fileToolBar = addToolBar(tr("File"));
fileToolBar->addAction(newAct);
fileToolBar->addAction(openAct);
fileToolBar->addAction(saveAct);
editToolBar = addToolBar(tr("Edit"));
editToolBar->addAction(cutAct);
editToolBar->addAction(copyAct);
editToolBar->addAction(pasteAct);
}
void collection::createStatusBar()
{
statusBar()->showMessage(tr("Ready"));
}
void collection::readSettings()
{
QSettings settings("Trolltech", "Application Example");
QPoint pos = settings.value("pos", QPoint(200, 200)).toPoint();
QSize size = settings.value("size", QSize(400, 400)).toSize();
resize(size);
move(pos);
}
void collection::writeSettings()
{
QSettings settings("Trolltech", "Application Example");
settings.setValue("pos", pos());
settings.setValue("size", size());
}
bool collection::maybeSave()
{
if (textEdit->document()->isModified()) {
int ret = QMessageBox::warning(this, tr("Application"),
tr("The document has been modified.\n"
"Do you want to save your changes?"),
QMessageBox::Yes | QMessageBox::Default,
QMessageBox::No,
QMessageBox::Cancel | QMessageBox::Escape);
if (ret == QMessageBox::Yes)
return save();
else if (ret == QMessageBox::Cancel)
return false;
}
return true;
}
void collection::loadFile(const QString &fileName)
{
QFile file(fileName);
if (!file.open(QFile::ReadOnly | QFile::Text)) {
QMessageBox::warning(this, tr("Application"),
tr("Cannot read file %1:\n%2.")
.arg(fileName)
.arg(file.errorString()));
return;
}
QTextStream in(&file);
QApplication::setOverrideCursor(Qt::WaitCursor);
textEdit->setPlainText(in.readAll());
QApplication::restoreOverrideCursor();
setCurrentFile(fileName);
statusBar()->showMessage(tr("File loaded"), 2000);
}
bool collection::saveFile(const QString &fileName)
{
QFile file(fileName);
if (!file.open(QFile::WriteOnly | QFile::Text)) {
QMessageBox::warning(this, tr("Application"),
tr("Cannot write file %1:\n%2.")
.arg(fileName)
.arg(file.errorString()));
return false;
}
QTextStream out(&file);
QApplication::setOverrideCursor(Qt::WaitCursor);
out << textEdit->toPlainText();
QApplication::restoreOverrideCursor();
setCurrentFile(fileName);
statusBar()->showMessage(tr("File saved"), 2000);
return true;
}
void collection::setCurrentFile(const QString &fileName)
{
curFile = fileName;
textEdit->document()->setModified(false);
setWindowModified(false);
QString shownName;
if (curFile.isEmpty())
shownName = "untitled.txt";
else
shownName = strippedName(curFile);
setWindowTitle(tr("%1[*] - %2").arg(shownName).arg(tr("Application")));
}
QString collection::strippedName(const QString &fullFileName)
{
return QFileInfo(fullFileName).fileName();
}
collection::~collection()
{
}
void collection::mousePressEvent ( QMouseEvent * e ){
//QGraphicsScene scene;
//myPopulateScene(&scene);
// извлечь прямоугольник(создать прямоугольник (параметры прямоугольника))
QGraphicsRectItem *rect = scene.addRect(QRectF (0, 0, 50, 100));
// извлечь линию ()
QGraphicsLineItem *fr = scene.addLine ( 30, 30, 200, 200, QPen(Qt::black) );
int x = 40, y = 40, shirina= 30, visota = 30;
QGraphicsEllipseItem * krug[300];
for(int i = 0; i < 300; i++){
x+=50;
if ( x + 30 >= scene.sceneRect().width()) x = 0, y +=40;
// конструируем прямоугольник
const QRectF kvadrat4ellipse(x, y, shirina, visota);
// Qt:: - глобобьное пространство имен Qt
// извлечь эллипс (очерченный вокруг, Qt::зеленого цвета,заполнение - плотная кисть )
krug[i] = scene.addEllipse (kvadrat4ellipse , QPen(Qt::darkGreen), QBrush(Qt::darkGreen, Qt::Dense2Pattern) ) ;
//QGraphicsLineItem *fr = scene.addItem();
}
QGraphicsView view(&scene);
view.show();
}
