squawk/ui/widgets/vcard/omemo/keydelegate.cpp

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// Squawk messenger.
// Copyright (C) 2019 Yury Gubich <blue@macaw.me>
//
// 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, see <http://www.gnu.org/licenses/>.
#include "keydelegate.h"
#include <QPainter>
#include <QFontDatabase>
#include "keysmodel.h"
constexpr int minHeight = 50;
constexpr int minWidth = 400;
constexpr uint8_t margin = 10;
constexpr uint8_t partSize = 8;
constexpr uint8_t maxSingleLineParts = 3;
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UI::KeyDelegate::KeyDelegate(QObject* parent):
QStyledItemDelegate(parent),
fingerPrintFont(QFontDatabase::systemFont(QFontDatabase::FixedFont)),
fingerPrintMetrics(fingerPrintFont),
spaceWidth(fingerPrintMetrics.horizontalAdvance(" "))
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{
}
UI::KeyDelegate::~KeyDelegate() {}
void UI::KeyDelegate::paint(QPainter* painter, const QStyleOptionViewItem& option, const QModelIndex& index) const {
painter->save();
painter->setRenderHint(QPainter::Antialiasing, true);
bool hover = option.state & QStyle::State_MouseOver;
if (hover) {
painter->save();
painter->fillRect(option.rect, option.palette.brush(QPalette::Inactive, QPalette::Highlight));
painter->restore();
}
QVariant fingerPrintV = index.data(UI::KeysModel::FingerPrint);
if (fingerPrintV.isValid()) {
painter->save();
painter->setFont(fingerPrintFont);
QByteArray fingerPrint = fingerPrintV.toByteArray();
std::vector<QString> parts = getParts(fingerPrint);
uint8_t partsLength = parts.size();
QRect rect = option.rect;
rect.adjust(margin, margin, 0, 0);
QRect r;
uint8_t firstLine;
if (partsLength > maxSingleLineParts)
firstLine = partsLength / 2 + partsLength % 2;
else
firstLine = partsLength;
for (uint8_t i = 0; i < partsLength; ++i) {
if (i == firstLine) {
rect.setLeft(option.rect.left() + margin);
rect.adjust(0, r.height() + fingerPrintMetrics.leading(), 0, 0);
}
painter->drawText(rect, Qt::AlignLeft | Qt::AlignTop, parts[i], &r);
rect.adjust(r.width() + spaceWidth ,0, 0, 0);
}
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painter->restore();
}
//painter->drawText(option.rect, option.displayAlignment, index.data().toString());
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painter->restore();
}
QSize UI::KeyDelegate::sizeHint(const QStyleOptionViewItem& option, const QModelIndex& index) const {
QSize size = QStyledItemDelegate::sizeHint(option, index);
int mh = margin * 2;
int mw = margin * 2;
QVariant fingerPrintV = index.data(UI::KeysModel::FingerPrint);
if (fingerPrintV.isValid()) {
QString hex = fingerPrintV.toByteArray().toHex();
uint8_t parts = hex.size() / partSize;
mh += fingerPrintMetrics.height();
if (parts > maxSingleLineParts) {
mh += fingerPrintMetrics.height() + fingerPrintMetrics.leading();
}
uint8_t firstLine;
if (parts > maxSingleLineParts)
firstLine = parts / 2 + parts % 2;
else
firstLine = parts;
mw += firstLine * partSize * spaceWidth + (firstLine - 1) * spaceWidth;
}
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if (size.width() < mw)
size.setWidth(mw);
if (size.height() < mh)
size.setHeight(mh);
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return size;
}
std::vector<QString> UI::KeyDelegate::getParts(const QByteArray& data) {
QString hex = data.toHex();
uint8_t parts = hex.size() / partSize;
std::vector<QString> result(parts);
for (uint8_t i = 0; i < parts; ++i) {
uint16_t index = i * partSize;
uint8_t length = partSize;
if (index + length > hex.size())
length = hex.size() - index;
QStringRef part(&hex, index, length);
result[i] = part.toString();
}
return result;
}