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#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QFileDialog>
#include <QLineEdit>
#include <QMessageBox>
#include <QPdfDocument>
#include <QtMath>
#include "sequentialpagewidget.h"
const qreal zoomMultiplier = qSqrt(2.0);
Q_LOGGING_CATEGORY(lcExample, "qt.examples.pdfviewer")
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
, m_pageWidget(new SequentialPageWidget(this))
, m_zoomEdit(new QLineEdit(this))
, m_pageEdit(new QLineEdit(this))
{
ui->setupUi(this);
ui->scrollArea->setWidget(m_pageWidget);
m_zoomEdit->setMaximumWidth(50);
m_zoomEdit->setAlignment(Qt::AlignHCenter);
ui->mainToolBar->insertWidget(ui->actionZoom_In, m_zoomEdit);
m_pageEdit->setMaximumWidth(50);
m_pageEdit->setAlignment(Qt::AlignHCenter);
ui->mainToolBar->insertWidget(ui->actionGo, m_pageEdit);
connect(m_pageWidget, SIGNAL(showingPageRange(int,int)),
this, SLOT(showingPageRange(int,int)), Qt::QueuedConnection);
connect(m_pageWidget, SIGNAL(zoomChanged(qreal)),
this, SLOT(zoomChanged(qreal)));
connect(m_zoomEdit, SIGNAL(returnPressed()), this, SLOT(zoomEdited()));
connect(m_pageEdit, SIGNAL(returnPressed()), this, SLOT(on_actionGo_triggered()));
}
MainWindow::~MainWindow()
{
delete ui;
}
void MainWindow::open(const QUrl &docLocation)
{
if (docLocation.isLocalFile())
m_pageWidget->openDocument(docLocation);
else {
qCDebug(lcExample) << docLocation << "is not a valid local file";
QMessageBox::critical(this, tr("Failed to open"), tr("%1 is not a valid local file").arg(docLocation.toString()));
}
qCDebug(lcExample) << docLocation;
ui->scrollArea->ensureVisible(0, 0, 0, 0);
}
void MainWindow::showingPageRange(int start, int end)
{
ui->statusBar->clearMessage();
if (start == end)
ui->statusBar->showMessage(tr("showing page %1").arg(start));
else
ui->statusBar->showMessage(tr("showing pages %1 to %2").arg(start).arg(end));
m_pageEdit->setText(QString::number(end));
}
void MainWindow::zoomChanged(qreal factor)
{
m_zoomEdit->setText(tr("%1%").arg(factor * 100., 0, 'f', 0));
}
void MainWindow::zoomEdited()
{
bool ok = false;
qreal factor = m_zoomEdit->text().remove(QChar('%')).toDouble(&ok);
if (ok)
m_pageWidget->setZoom(factor / 100.);
}
void MainWindow::on_actionOpen_triggered()
{
QUrl toOpen = QFileDialog::getOpenFileUrl(this, tr("Choose a PDF"), QUrl(), "Portable Documents (*.pdf)");
if (toOpen.isValid())
open(toOpen);
}
void MainWindow::on_actionQuit_triggered()
{
QApplication::quit();
}
void MainWindow::on_actionAbout_triggered()
{
QMessageBox::about(this, tr("About PdfViewer"),
tr("An example using QPdfDocument"));
}
void MainWindow::on_actionAbout_Qt_triggered()
{
QMessageBox::aboutQt(this);
}
void MainWindow::on_actionZoom_In_triggered()
{
m_pageWidget->setZoom(m_pageWidget->zoom() * zoomMultiplier);
}
void MainWindow::on_actionZoom_Out_triggered()
{
m_pageWidget->setZoom(m_pageWidget->zoom() / zoomMultiplier);
}
void MainWindow::on_actionGo_triggered()
{
bool ok = false;
int page = m_pageEdit->text().toInt(&ok);
if (!ok) return;
ui->scrollArea->ensureVisible(0, m_pageWidget->yForPage(page));
}
void MainWindow::on_actionPrevious_Page_triggered()
{
ui->scrollArea->ensureVisible(0, m_pageWidget->yForPage(m_pageWidget->topPageShowing() - 1));
}
void MainWindow::on_actionNext_Page_triggered()
{
ui->scrollArea->ensureVisible(0, m_pageWidget->yForPage(m_pageWidget->bottomPageShowing() + 1));
}
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