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# -*- coding: utf-8 -*-
#
# This file is part of the qpageview package.
#
# Copyright (c) 2016 - 2019 by Wilbert Berendsen
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 3
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# See http://www.gnu.org/licenses/ for more information.
"""
A page that can display a SVG document.
"""
from PyQt6.QtCore import QRect, QRectF, Qt
from PyQt6.QtGui import QColor, QPainter
from PyQt6.QtSvg import QSvgRenderer
from .constants import (
Rotate_0,
Rotate_90,
Rotate_180,
Rotate_270,
)
from . import document
from . import locking
from . import page
from . import render
class SvgPage(page.AbstractRenderedPage):
"""A page that can display a SVG document."""
dpi = 90.0
def __init__(self, svgrenderer, renderer=None):
super().__init__(renderer)
self._svg = svgrenderer
self.pageWidth = svgrenderer.defaultSize().width()
self.pageHeight = svgrenderer.defaultSize().height()
self._viewBox = svgrenderer.viewBoxF()
@classmethod
def load(cls, filename, renderer=None):
"""Load a SVG document from filename, which may also be a QByteArray.
Yields only one Page instance, as SVG currently supports one page per
file. If the file can't be loaded by the underlying QSvgRenderer,
no Page is yielded.
"""
r = QSvgRenderer()
if r.load(filename):
yield cls(r, renderer)
def mutex(self):
return self._svg
def group(self):
return self._svg
class SvgDocument(document.MultiSourceDocument):
"""A Document representing a group of SVG files."""
pageClass = SvgPage
def createPages(self):
return self.pageClass.loadFiles(self.sources(), self.renderer)
class SvgRenderer(render.AbstractRenderer):
"""Render SVG pages."""
def setRenderHints(self, painter):
"""Sets the renderhints for the painter we want to use."""
painter.setRenderHint(QPainter.RenderHint.Antialiasing, self.antialiasing)
painter.setRenderHint(QPainter.RenderHint.TextAntialiasing, self.antialiasing)
def draw(self, page, painter, key, tile, paperColor=None):
"""Draw the specified tile of the page (coordinates in key) on painter."""
# determine the part to draw; convert tile to viewbox
viewbox = self.map(key, page._viewBox).mapRect(QRectF(*tile))
target = QRectF(0, 0, tile.w, tile.h)
if key.rotation & 1:
target.setSize(target.size().transposed())
with locking.lock(page._svg):
page._svg.setViewBox(viewbox)
# we must specify the target otherwise QSvgRenderer scales to the
# unrotated image
painter.save()
painter.setClipRect(target, Qt.ClipOperation.IntersectClip)
# QSvgRenderer seems to set antialiasing always on anyway... :-)
self.setRenderHints(painter)
page._svg.render(painter, target)
painter.restore()
page._svg.setViewBox(page._viewBox)
# install a default renderer, so SvgPage can be used directly
SvgPage.renderer = SvgRenderer()
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