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package MainWindow;
use strict;
use warnings;
use blib;
use QtCore4;
use QtGui4;
# [0]
use QtCore4::isa qw( Qt::MainWindow );
use QtCore4::slots
open => [],
save => [],
penColor => [],
penWidth => [],
about => [];
use ScribbleArea;
sub scribbleArea() {
return this->{scribbleArea};
}
sub saveAsMenu() {
return this->{saveAsMenu};
}
sub fileMenu() {
return this->{fileMenu};
}
sub optionMenu() {
return this->{optionMenu};
}
sub helpMenu() {
return this->{helpMenu};
}
sub openAct() {
return this->{openAct};
}
sub saveAsActs() {
return this->{saveAsActs};
}
sub exitAct() {
return this->{exitAct};
}
sub penColorAct() {
return this->{penColorAct};
}
sub penWidthAct() {
return this->{penWidthAct};
}
sub printAct() {
return this->{printAct};
}
sub clearScreenAct() {
return this->{clearScreenAct};
}
sub aboutAct() {
return this->{aboutAct};
}
sub aboutQtAct() {
return this->{aboutQtAct};
}
# [0]
# [0]
sub NEW {
my ( $class, $parent ) = @_;
$class->SUPER::NEW( $parent );
this->{scribbleArea} = ScribbleArea();
this->setCentralWidget(this->scribbleArea);
this->createActions();
this->createMenus();
this->setWindowTitle(this->tr('Scribble'));
this->resize(500, 500);
}
# [0]
# [1]
sub closeEvent {
# [1] //! [2]
my ($event) = @_;
if (this->maybeSave()) {
$event->accept();
} else {
$event->ignore();
}
}
# [2]
# [3]
sub open {
# [3] //! [4]
if (maybeSave()) {
my $fileName = Qt::FileDialog::getOpenFileName(this,
this->tr('Open File'), Qt::Dir::currentPath());
if ($fileName) {
this->scribbleArea->openImage($fileName);
}
}
}
# [4]
# [5]
sub save {
# [5] //! [6]
my $action = this->sender();
my $fileFormat = $action->data()->toString();
this->saveFile($fileFormat);
}
# [6]
# [7]
sub penColor {
# [7] //! [8]
my $newColor = Qt::ColorDialog::getColor(this->scribbleArea->penColor());
if ($newColor->isValid()) {
this->scribbleArea->setPenColor($newColor);
}
}
# [8]
# [9]
sub penWidth {
# [9] //! [10]
my $ok = 0;
my $newWidth = Qt::InputDialog::getInteger(this, this->tr('Scribble'),
this->tr('Select pen width:'),
this->scribbleArea->penWidth(),
1, 50, 1, $ok);
if ($ok) {
this->scribbleArea->setPenWidth($newWidth);
}
}
# [10]
# [11]
sub about {
# [11] //! [12]
Qt::MessageBox::about(this, this->tr('About Scribble'),
this->tr('<p>The <b>Scribble</b> example shows how to use Qt::MainWindow as the ' .
'base widget for an application, and how to reimplement some of ' .
'Qt::Widget\'s event handlers to receive the events generated for ' .
'the application\'s widgets:</p><p> We reimplement the mouse event ' .
'handlers to facilitate drawing, the paint event handler to ' .
'update the application and the resize event handler to optimize ' .
'the application\'s appearance. In addition we reimplement the ' .
'close event handler to intercept the close events before ' .
'terminating the application.</p><p> The example also demonstrates ' .
'how to use Qt::Painter to draw an image in real time, as well as ' .
'to repaint widgets.</p>'));
}
# [12]
# [13]
sub createActions {
# [13] //! [14]
this->{openAct} = Qt::Action(this->tr('&Open...'), this);
this->openAct->setShortcut(Qt::KeySequence(this->tr('Ctrl+O')));
this->connect(this->openAct, SIGNAL 'triggered()', this, SLOT 'open()');
foreach my $format ( @{Qt::ImageWriter::supportedImageFormats()} ) {
my $text = sprintf this->tr('%s...'), uc $format;
my $action = Qt::Action($text, this);
$action->setData(Qt::Variant(Qt::String($format)));
this->connect($action, SIGNAL 'triggered()', this, SLOT 'save()');
push @{this->{saveAsActs}}, $action;
}
this->{printAct} = Qt::Action(this->tr('&Print...'), this);
this->connect(this->printAct, SIGNAL 'triggered()', this->scribbleArea, SLOT 'print()');
this->{exitAct} = Qt::Action(this->tr('E&xit'), this);
this->exitAct->setShortcut(Qt::KeySequence(this->tr('Ctrl+Q')));
this->connect(this->exitAct, SIGNAL 'triggered()', this, SLOT 'close()');
this->{penColorAct} = Qt::Action(this->tr('&Pen Color...'), this);
this->connect(this->penColorAct, SIGNAL 'triggered()', this, SLOT 'penColor()');
this->{penWidthAct} = Qt::Action(this->tr('Pen &Width...'), this);
this->connect(this->penWidthAct, SIGNAL 'triggered()', this, SLOT 'penWidth()');
this->{clearScreenAct} = Qt::Action(this->tr('&Clear Screen'), this);
this->clearScreenAct->setShortcut(Qt::KeySequence(this->tr('Ctrl+L')));
this->connect(this->clearScreenAct, SIGNAL 'triggered()',
this->scribbleArea, SLOT 'clearImage()');
this->{aboutAct} = Qt::Action(this->tr('&About'), this);
this->connect(this->aboutAct, SIGNAL 'triggered()', this, SLOT 'about()');
this->{aboutQtAct} = Qt::Action(this->tr('About &Qt'), this);
this->connect(this->aboutQtAct, SIGNAL 'triggered()', qApp, SLOT 'aboutQt()');
}
# [14]
# [15]
sub createMenus {
# [15] //! [16]
this->{saveAsMenu} = Qt::Menu(this->tr('&Save As'), this);
foreach my $action ( @{this->{saveAsActs}} ) {
this->saveAsMenu->addAction($action);
}
this->{fileMenu} = Qt::Menu(this->tr('&File'), this);
this->fileMenu->addAction(this->openAct);
this->fileMenu->addMenu(this->saveAsMenu);
this->fileMenu->addAction(this->printAct);
this->fileMenu->addSeparator();
this->fileMenu->addAction(this->exitAct);
this->{optionMenu} = Qt::Menu(this->tr('&Options'), this);
this->optionMenu->addAction(this->penColorAct);
this->optionMenu->addAction(this->penWidthAct);
this->optionMenu->addSeparator();
this->optionMenu->addAction(this->clearScreenAct);
this->{helpMenu} = Qt::Menu(this->tr('&Help'), this);
this->helpMenu->addAction(this->aboutAct);
this->helpMenu->addAction(this->aboutQtAct);
this->menuBar()->addMenu(this->fileMenu);
this->menuBar()->addMenu(this->optionMenu);
this->menuBar()->addMenu(this->helpMenu);
}
# [16]
# [17]
sub maybeSave {
# [17] //! [18]
if (this->scribbleArea->isModified()) {
my $ret = Qt::MessageBox::warning(this, this->tr('Scribble'),
this->tr("The image has been modified.\n" .
'Do you want to save your changes?'),
CAST Qt::MessageBox::Save() | Qt::MessageBox::Discard()
| Qt::MessageBox::Cancel(), 'QMessageBox::StandardButtons');
if ($ret == Qt::MessageBox::Save()) {
return this->saveFile('png');
} elsif ($ret == Qt::MessageBox::Cancel()) {
return 0;
}
}
return 1;
}
# [18]
# [19]
sub saveFile {
# [19] //! [20]
my ($fileFormat) = @_;
my $initialPath = Qt::Dir::currentPath() . '/untitled.' . $fileFormat;
my $fileName = Qt::FileDialog::getSaveFileName(this, this->tr('Save As'),
$initialPath,
sprintf( this->tr('%s Files (*.%s);;All Files (*)'),
uc $fileFormat,
$fileFormat )
);
if (!$fileName) {
return 0;
} else {
return this->scribbleArea->saveImage($fileName, $fileFormat);
}
}
# [20]
1;
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