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Issue #159: Renaming applications
This commit is contained in:
Jakub Melka
240
Pdf4QtPageMaster/pageitemdelegate.cpp
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240
Pdf4QtPageMaster/pageitemdelegate.cpp
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// Copyright (C) 2021 Jakub Melka
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//
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// This file is part of PDF4QT.
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//
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// PDF4QT is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// with the written consent of the copyright owner, any later version.
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//
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// PDF4QT is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with PDF4QT. If not, see <https://www.gnu.org/licenses/>.
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#include "pageitemdelegate.h"
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#include "pageitemmodel.h"
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#include "pdfwidgetutils.h"
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#include "pdfpainterutils.h"
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#include "pdfrenderer.h"
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#include "pdfcompiler.h"
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#include "pdfconstants.h"
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#include <QPainter>
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#include <QPixmapCache>
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namespace pdfpagemaster
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{
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PageItemDelegate::PageItemDelegate(PageItemModel* model, QObject* parent) :
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BaseClass(parent),
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m_model(model),
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m_rasterizer(nullptr)
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{
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m_rasterizer = new pdf::PDFRasterizer(this);
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m_rasterizer->reset(pdf::RendererEngine::Blend2D_SingleThread);
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}
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PageItemDelegate::~PageItemDelegate()
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{
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}
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void PageItemDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
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{
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const PageGroupItem* item = m_model->getItem(index);
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if (!item)
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{
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return;
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}
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QRect rect = option.rect;
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m_dpiScaleRatio = option.widget->devicePixelRatioF();
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QSize scaledSize = pdf::PDFWidgetUtils::scaleDPI(option.widget, m_pageImageSize);
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int verticalSpacing = pdf::PDFWidgetUtils::scaleDPI_y(option.widget, getVerticalSpacing());
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int horizontalSpacing = pdf::PDFWidgetUtils::scaleDPI_x(option.widget, getHorizontalSpacing());
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QRect pageBoundingRect = QRect(QPoint(rect.left() + (rect.width() - scaledSize.width()) / 2, rect.top() + verticalSpacing), scaledSize);
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// Draw page preview
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if (!item->groups.empty())
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{
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const PageGroupItem::GroupItem& groupItem = item->groups.front();
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QSizeF rotatedPageSize = pdf::PDFPage::getRotatedBox(QRectF(QPointF(0, 0), groupItem.rotatedPageDimensionsMM), groupItem.pageAdditionalRotation).size();
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QSize pageImageSize = rotatedPageSize.scaled(pageBoundingRect.size(), Qt::KeepAspectRatio).toSize();
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QRect pageImageRect(pageBoundingRect.topLeft() + QPoint((pageBoundingRect.width() - pageImageSize.width()) / 2, (pageBoundingRect.height() - pageImageSize.height()) / 2), pageImageSize);
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painter->setBrush(Qt::white);
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painter->drawRect(pageImageRect);
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QPixmap pageImagePixmap = getPageImagePixmap(item, pageImageRect);
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if (!pageImagePixmap.isNull())
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{
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painter->drawPixmap(pageImageRect, pageImagePixmap);
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}
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painter->setPen(QPen(Qt::black));
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painter->setBrush(Qt::NoBrush);
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painter->drawRect(pageImageRect);
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}
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int textOffset = pageBoundingRect.bottom() + verticalSpacing;
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QRect textRect = option.rect;
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textRect.setTop(textOffset);
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textRect.setHeight(option.fontMetrics.lineSpacing());
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painter->drawText(textRect, Qt::AlignCenter | Qt::TextSingleLine, item->groupName);
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textRect.translate(0, textRect.height());
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painter->drawText(textRect, Qt::AlignCenter | Qt::TextSingleLine, item->pagesCaption);
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if (option.state.testFlag(QStyle::State_Selected))
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{
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QColor selectedColor = option.palette.color(QPalette::Active, QPalette::Highlight);
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selectedColor.setAlphaF(0.3f);
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painter->fillRect(rect, selectedColor);
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}
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QPoint tagPoint = rect.topRight() + QPoint(-horizontalSpacing, verticalSpacing);
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for (const QString& tag : item->tags)
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{
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QStringList splitted = tag.split('@', Qt::KeepEmptyParts);
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if (splitted.size() != 2 || splitted.back().isEmpty())
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{
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continue;
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}
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QColor color;
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color.fromString(splitted.front());
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QRect bubbleRect = pdf::PDFPainterHelper::drawBubble(painter, tagPoint, color, splitted.back(), Qt::AlignLeft | Qt::AlignBottom);
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tagPoint.ry() += bubbleRect.height() + verticalSpacing;
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}
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}
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QSize PageItemDelegate::sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const
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{
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Q_UNUSED(index);
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QSize scaledSize = pdf::PDFWidgetUtils::scaleDPI(option.widget, m_pageImageSize);
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int height = scaledSize.height() + option.fontMetrics.lineSpacing() * 2 + 2 * pdf::PDFWidgetUtils::scaleDPI_y(option.widget, getVerticalSpacing());
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int width = qMax(pdf::PDFWidgetUtils::scaleDPI_x(option.widget, 40), scaledSize.width() + 2 * pdf::PDFWidgetUtils::scaleDPI_x(option.widget, getHorizontalSpacing()));
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return QSize(width, height);
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}
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QSize PageItemDelegate::getPageImageSize() const
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{
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return m_pageImageSize;
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}
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void PageItemDelegate::setPageImageSize(QSize pageImageSize)
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{
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if (m_pageImageSize != pageImageSize)
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{
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m_pageImageSize = pageImageSize;
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Q_EMIT sizeHintChanged(QModelIndex());
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}
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}
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QPixmap PageItemDelegate::getPageImagePixmap(const PageGroupItem* item, QRect rect) const
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{
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QPixmap pixmap;
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Q_ASSERT(item);
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if (item->groups.empty())
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{
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return pixmap;
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}
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const PageGroupItem::GroupItem& groupItem = item->groups.front();
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if (groupItem.pageType == PT_Empty)
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{
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return pixmap;
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}
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// Jakub Melka: generate key and see, if pixmap is not cached
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QString key = QString("%1#%2#%3#%4#%5@%6x%7").arg(groupItem.documentIndex).arg(groupItem.imageIndex).arg(int(groupItem.pageAdditionalRotation)).arg(groupItem.pageIndex).arg(groupItem.pageType).arg(rect.width()).arg(rect.height());
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if (!QPixmapCache::find(key, &pixmap))
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{
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// We must draw the pixmap
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pixmap = QPixmap(rect.width(), rect.height());
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pixmap.fill(Qt::transparent);
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switch (groupItem.pageType)
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{
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case pdfpagemaster::PT_DocumentPage:
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{
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const auto& documents = m_model->getDocuments();
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auto it = documents.find(groupItem.documentIndex);
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if (it != documents.cend())
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{
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const pdf::PDFDocument& document = it->second.document;
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const pdf::PDFInteger pageIndex = groupItem.pageIndex - 1;
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if (pageIndex >= 0 && pageIndex < pdf::PDFInteger(document.getCatalog()->getPageCount()))
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{
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const pdf::PDFPage* page = document.getCatalog()->getPage(pageIndex);
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Q_ASSERT(page);
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pdf::PDFPrecompiledPage compiledPage;
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pdf::PDFFontCache fontCache(pdf::DEFAULT_FONT_CACHE_LIMIT, pdf::DEFAULT_REALIZED_FONT_CACHE_LIMIT);
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pdf::PDFCMSManager cmsManager(nullptr);
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pdf::PDFOptionalContentActivity optionalContentActivity(&document, pdf::OCUsage::View, nullptr);
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fontCache.setDocument(pdf::PDFModifiedDocument(const_cast<pdf::PDFDocument*>(&document), &optionalContentActivity));
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cmsManager.setDocument(&document);
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pdf::PDFCMSPointer cms = cmsManager.getCurrentCMS();
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pdf::PDFRenderer renderer(&document, &fontCache, cms.data(), &optionalContentActivity, pdf::PDFRenderer::getDefaultFeatures(), pdf::PDFMeshQualitySettings());
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renderer.compile(&compiledPage, pageIndex);
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QSize imageSize = rect.size() * m_dpiScaleRatio;
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QImage pageImage = m_rasterizer->render(pageIndex, page, &compiledPage, imageSize, pdf::PDFRenderer::getDefaultFeatures(), nullptr, groupItem.pageAdditionalRotation);
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pixmap = QPixmap::fromImage(qMove(pageImage));
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}
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}
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break;
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}
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case pdfpagemaster::PT_Image:
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{
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const auto& images = m_model->getImages();
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auto it = images.find(groupItem.imageIndex);
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if (it != images.cend())
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{
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const QImage& image = it->second.image;
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if (!image.isNull())
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{
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QRect drawRect(QPoint(0, 0), rect.size());
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QRect mediaBox(QPoint(0, 0), image.size());
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QRectF rotatedMediaBox = pdf::PDFPage::getRotatedBox(mediaBox, groupItem.pageAdditionalRotation);
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QTransform matrix = pdf::PDFRenderer::createMediaBoxToDevicePointMatrix(rotatedMediaBox, drawRect, groupItem.pageAdditionalRotation);
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QPainter painter(&pixmap);
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painter.setWorldTransform(QTransform(matrix));
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painter.translate(0, image.height());
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painter.scale(1.0, -1.0);
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painter.drawImage(0, 0, image);
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}
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}
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break;
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}
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case pdfpagemaster::PT_Empty:
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Q_ASSERT(false);
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break;
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default:
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Q_ASSERT(false);
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break;
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}
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QPixmapCache::insert(key, pixmap);
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}
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return pixmap;
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}
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} // namespace pdfpagemaster
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