qpdfviewsb/sources/searchitemdelegate.cpp

145 行
4.2 KiB
C++

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