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# Copyright (C) 2023 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from math import sqrt
from PySide6.QtWidgets import (QListView, QTreeView)
from PySide6.QtGui import QIcon, QPainter
from PySide6.QtCore import (QDir, QIODevice, QModelIndex,
QPointF, Slot)
from PySide6.QtPrintSupport import QPrinter
from PySide6.QtPdf import QPdfDocument, QPdfBookmarkModel
from PySide6.QtPdfWidgets import QPdfView, QPdfPageSelector
from abstractviewer import AbstractViewer
from pdfviewer.zoomselector import ZoomSelector
ZOOM_MULTIPLIER = sqrt(2.0)
class PdfViewer(AbstractViewer):
def __init__(self):
super().__init__()
self.uiInitialized.connect(self.initPdfViewer)
self._toolBar = None
self._zoomSelector = None
self._pageSelector = None
self._document = None
self._pdfView = None
self._actionForward = None
self._actionBack = None
self._bookmarks = None
self._pages = None
def init(self, file, parent, mainWindow):
self._pdfView = QPdfView(parent)
super().init(file, self._pdfView, mainWindow)
self._document = QPdfDocument(self)
def supportedMimeTypes(self):
return ["application/pdf"]
def initPdfViewer(self):
self._toolBar = self.addToolBar("PDF")
self._zoomSelector = ZoomSelector(self._toolBar)
nav = self._pdfView.pageNavigator()
self._pageSelector = QPdfPageSelector(self._toolBar)
self._toolBar.insertWidget(self._uiAssets_forward, self._pageSelector)
self._pageSelector.setDocument(self._document)
self._pageSelector.currentPageChanged.connect(self.pageSelected)
nav.currentPageChanged.connect(self._pageSelector.setCurrentPage)
nav.backAvailableChanged.connect(self._uiAssets_back.setEnabled)
self._actionBack = self._uiAssets_back
self._actionForward = self._uiAssets_forward
self._uiAssets_back.triggered.connect(self.onActionBackTriggered)
self._uiAssets_forward.triggered.connect(self.onActionForwardTriggered)
self._toolBar.addSeparator()
self._toolBar.addWidget(self._zoomSelector)
actionZoomIn = self._toolBar.addAction("Zoom in")
actionZoomIn.setToolTip("Increase zoom level")
icon = QIcon.fromTheme(QIcon.ThemeIcon.ZoomIn,
QIcon(":/demos/documentviewer/images/zoom-in.png"))
actionZoomIn.setIcon(icon)
self._toolBar.addAction(actionZoomIn)
actionZoomIn.triggered.connect(self.onActionZoomInTriggered)
actionZoomOut = self._toolBar.addAction("Zoom out")
actionZoomOut.setToolTip("Decrease zoom level")
icon = QIcon.fromTheme(QIcon.ThemeIcon.ZoomIn,
QIcon(":/demos/documentviewer/images/zoom-out.png"))
actionZoomOut.setIcon(icon)
self._toolBar.addAction(actionZoomOut)
actionZoomOut.triggered.connect(self.onActionZoomOutTriggered)
nav.backAvailableChanged.connect(self._actionBack.setEnabled)
nav.forwardAvailableChanged.connect(self._actionForward.setEnabled)
self._zoomSelector.zoomModeChanged.connect(self._pdfView.setZoomMode)
self._zoomSelector.zoomFactorChanged.connect(self._pdfView.setZoomFactor)
self._zoomSelector.reset()
bookmarkModel = QPdfBookmarkModel(self)
bookmarkModel.setDocument(self._document)
self._uiAssets_tabs.clear()
self._bookmarks = QTreeView(self._uiAssets_tabs)
self._bookmarks.activated.connect(self.bookmarkSelected)
self._bookmarks.setModel(bookmarkModel)
self._pdfView.setDocument(self._document)
self._pdfView.setPageMode(QPdfView.PageMode.MultiPage)
self.openPdfFile()
if not self._document.pageCount():
return
self._pages = QListView(self._uiAssets_tabs)
self._pages.setModel(self._document.pageModel())
self._pages.selectionModel().currentRowChanged.connect(self._currentRowChanged)
self._pdfView.pageNavigator().currentPageChanged.connect(self._pageChanged)
self._uiAssets_tabs.addTab(self._pages, "Pages")
self._uiAssets_tabs.addTab(self._bookmarks, "Bookmarks")
def viewerName(self):
return "PdfViewer"
@Slot(QModelIndex, QModelIndex)
def _currentRowChanged(self, current, previous):
if previous == current:
return
nav = self._pdfView.pageNavigator()
row = current.row()
if nav.currentPage() == row:
return
nav.jump(row, QPointF(), nav.currentZoom())
@Slot(int)
def _pageChanged(self, page):
if self._pages.currentIndex().row() == page:
return
self._pages.setCurrentIndex(self._pages.model().index(page, 0))
@Slot()
def openPdfFile(self):
self.disablePrinting()
if self._file.open(QIODevice.ReadOnly):
self._document.load(self._file)
documentTitle = self._document.metaData(QPdfDocument.MetaDataField.Title)
if not documentTitle:
documentTitle = "PDF Viewer"
self.statusMessage(documentTitle)
self.pageSelected(0)
file_name = QDir.toNativeSeparators(self._file.fileName())
self.statusMessage(f"Opened PDF file {file_name}")
self.maybeEnablePrinting()
def hasContent(self):
return self._document if self._document.pageCount() > 0 else False
def supportsOverview(self):
return True
def printDocument(self, printer):
if not self.hasContent():
return
painter = QPainter()
painter.begin(printer)
pageRect = printer.pageRect(QPrinter.Unit.DevicePixel).toRect()
pageSize = pageRect.size()
for i in range(0, self._document.pageCount()):
if i > 0:
printer.newPage()
page = self._document.render(i, pageSize)
painter.drawImage(pageRect, page)
painter.end()
@Slot(QModelIndex)
def bookmarkSelected(self, index):
if not index.isValid():
return
page = index.data(int(QPdfBookmarkModel.Role.Page))
zoomLevel = index.data(int(QPdfBookmarkModel.Role.Level)).toReal()
self._pdfView.pageNavigator().jump(page, QPointF(), zoomLevel)
@Slot(int)
def pageSelected(self, page):
nav = self._pdfView.pageNavigator()
nav.jump(page, QPointF(), nav.currentZoom())
@Slot()
def onActionZoomInTriggered(self):
self._pdfView.setZoomFactor(self._pdfView.zoomFactor() * ZOOM_MULTIPLIER)
@Slot()
def onActionZoomOutTriggered(self):
self._pdfView.setZoomFactor(self._pdfView.zoomFactor() / ZOOM_MULTIPLIER)
@Slot()
def onActionPreviousPageTriggered(self):
nav = self._pdfView.pageNavigator()
nav.jump(nav.currentPage() - 1, QPointF(), nav.currentZoom())
@Slot()
def onActionNextPageTriggered(self):
nav = self._pdfView.pageNavigator()
nav.jump(nav.currentPage() + 1, QPointF(), nav.currentZoom())
@Slot()
def onActionBackTriggered(self):
self._pdfView.pageNavigator().back()
@Slot()
def onActionForwardTriggered(self):
self._pdfView.pageNavigator().forward()
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