145 lines
4.2 KiB
C++
145 lines
4.2 KiB
C++
/*
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Copyright 2018 S. Razi Alavizadeh
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Copyright 2015 Adam Reichold
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This file is part of qpdfview.
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qpdfview is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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qpdfview 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 General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with qpdfview. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "searchitemdelegate.h"
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#include <QApplication>
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#include <qmath.h>
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#include <QPainter>
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#include <QTextLayout>
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#include "searchmodel.h"
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namespace qpdfview
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{
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SearchItemDelegate::SearchItemDelegate(QObject* parent) : QStyledItemDelegate(parent)
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{
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}
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void SearchItemDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const
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{
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QStyledItemDelegate::paint(painter, option, index);
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if(index.column() != 0)
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{
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return;
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}
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const int progress = index.data(SearchModel::ProgressRole).toInt();
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if(progress != 0)
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{
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paintProgress(painter, option, progress);
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return;
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}
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const QString matchedText = index.data(SearchModel::MatchedTextRole).toString();
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const QString surroundingText = index.data(SearchModel::SurroundingTextRole).toString();
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if(!matchedText.isEmpty() && !surroundingText.isEmpty())
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{
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paintText(painter, option, matchedText, surroundingText);
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return;
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}
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}
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void SearchItemDelegate::paintProgress(QPainter* painter, const QStyleOptionViewItem& option,
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int progress) const
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{
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QRect highlightedRect = option.rect;
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highlightedRect.setWidth(progress * highlightedRect.width() / 100);
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painter->save();
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painter->setCompositionMode(QPainter::CompositionMode_Multiply);
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painter->fillRect(highlightedRect, option.palette.highlight());
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painter->restore();
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}
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void SearchItemDelegate::paintText(QPainter* painter, const QStyleOptionViewItem& option,
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const QString& matchedText, const QString& surroundingText) const
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{
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const int textMargin = QApplication::style()->pixelMetric(QStyle::PM_FocusFrameHMargin) + 1;
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const QRect textRect = option.rect.adjusted(textMargin, 0, -textMargin, 0);
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const QString elidedText = option.fontMetrics.elidedText(surroundingText, option.textElideMode, textRect.width());
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QTextOption textOption;
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textOption.setWrapMode(QTextOption::NoWrap);
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textOption.setTextDirection(elidedText.isRightToLeft() ? Qt::RightToLeft : Qt::LeftToRight);
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textOption.setAlignment(QStyle::visualAlignment(textOption.textDirection(), option.displayAlignment));
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QTextLayout textLayout;
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textLayout.setTextOption(textOption);
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textLayout.setText(elidedText);
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textLayout.setFont(option.font);
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QFont font = textLayout.font();
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font.setWeight(QFont::Light);
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textLayout.setFont(font);
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QList< QTextLayout::FormatRange > additionalFormats;
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for(int index = 0; (index = surroundingText.indexOf(matchedText, index)) != -1; index += matchedText.length())
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{
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QTextLayout::FormatRange formatRange;
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formatRange.start = index;
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formatRange.length = matchedText.length();
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formatRange.format.setFontWeight(QFont::Bold);
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additionalFormats.append(formatRange);
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}
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textLayout.setAdditionalFormats(additionalFormats);
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textLayout.beginLayout();
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QTextLine textLine = textLayout.createLine();
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if(!textLine.isValid())
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{
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return;
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}
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textLine.setLineWidth(textRect.width());
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textLayout.endLayout();
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const QSize layoutSize(textRect.width(), qFloor(textLine.height()));
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const QRect layoutRect = QStyle::alignedRect(option.direction, option.displayAlignment, layoutSize, textRect);
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painter->save();
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painter->setClipping(true);
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painter->setClipRect(layoutRect);
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textLine.draw(painter, layoutRect.topLeft());
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painter->restore();
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}
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} // qpdfview
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