1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QFileDialog>
#include <QLineEdit>
#include <QMessageBox>
#include <QScroller>
#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()));
QScroller::grabGesture(ui->scrollArea);
}
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));
}
|
