So long, custom C++ delegate: you won't be missed
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/*
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* <one line to give the library's name and an idea of what it does.>
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* Copyright 2013 Luca Beltrame <lbeltrame@kde.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License or (at your option) version 3 or any later version
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* accepted by the membership of KDE e.V. (or its successor approved
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* by the membership of KDE e.V.), which shall act as a proxy
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* defined in Section 14 of version 3 of the license.
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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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// Own
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#include "danboorupostdelegate.h"
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#include "libdanbooru/danboorupost.h"
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// Qt
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#include <QListView>
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#include <QPainter>
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#include <QApplication>
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// KDE
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#include <QPushButton>
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#include <KLocalizedString>
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#include <KIconLoader>
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#include <KFormat>
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namespace Danbooru
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{
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const int DanbooruPostDelegate::MARGIN = 5;
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DanbooruPostDelegate::DanbooruPostDelegate(QListView *itemView): QStyledItemDelegate(itemView),
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m_itemView(itemView)
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{
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// Get the sizes for the buttons
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const int iconSize = KIconLoader::global()->currentSize(
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KIconLoader::Toolbar
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);
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const QSize sz = itemView->style()->sizeFromContents(
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QStyle::CT_ToolButton, 0,
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QSize(iconSize, iconSize));
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m_buttonSize = qMax(sz.width(), sz.height());
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m_downloadButton = new QPushButton(QIcon::fromTheme("download"),
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QString(), itemView);
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m_viewButton = new QPushButton(QIcon::fromTheme("view-preview"), QString(),
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itemView);
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m_downloadButton->hide();
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m_viewButton->hide();
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m_downloadButton->resize(m_buttonSize, m_buttonSize);
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m_viewButton->resize(m_buttonSize, m_buttonSize);
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m_downloadButton->setToolTip(i18n("Download image"));
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m_viewButton->setToolTip(i18n("View image"));
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// Signal-slot connections
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connect(m_viewButton, &QPushButton::clicked, this, &DanbooruPostDelegate::viewButtonClicked);
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connect(m_downloadButton, &QPushButton::clicked, this, &DanbooruPostDelegate::downloadButtonClicked);
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}
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void DanbooruPostDelegate::paint(QPainter *painter,
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const QStyleOptionViewItem &option,
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const QModelIndex &index) const
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{
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if (!index.isValid()) {
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return;
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}
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QStyleOptionViewItemV4 opt(option);
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// Pixmap
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QStyle *style = QApplication::style();
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style->drawPrimitive(QStyle::PE_PanelItemViewItem, &opt, painter, 0);
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painter->setRenderHint(QPainter::Antialiasing);
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QPixmap pixmap = index.data(Qt::DecorationRole).value<QPixmap>();
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if (pixmap.isNull()) {
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return;
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}
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QRect rect = opt.rect;
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QFontMetrics metrics = opt.fontMetrics;
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QRect textRect(rect.left() + MARGIN, rect.bottom() - 3 * metrics.height(),
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rect.width(), 3 * metrics.height());
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// Scaling is unavoidable to keep things in the right dimension
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QPixmap scaled;
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// Reserve enough space for the pixmap + the 3 lines of text:
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// this prevents issues with images that have height > width
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// (like in yande.re which keeps a lot of scans)
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int maxHeight = rect.height() - 3 * metrics.height() - 2 * MARGIN;
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scaled = pixmap.scaled(rect.width() - 2 * MARGIN,
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maxHeight,
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Qt::KeepAspectRatio,
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Qt::SmoothTransformation);
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QRect pixRect = scaled.rect();
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pixRect.moveCenter(rect.center());
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// move the pixmap up to accomodate some lines of text
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pixRect.moveTo(pixRect.left(),
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pixRect.top() - textRect.height() / 2);
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pixRect.moveBottom(textRect.top() - MARGIN);
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painter->drawPixmap(pixRect, scaled);
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painter->save();
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// Show buttons on mouseover
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if (option.state & QStyle::State_MouseOver) {
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// Get the bottom coordinate for the buttons
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// TODO: Perhaps add some transition?
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m_downloadButton->move(pixRect.topLeft());
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m_viewButton->move(pixRect.bottomLeft() - QPoint(
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0, m_viewButton->height() - 1.5 * MARGIN));
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m_downloadButton->show();
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m_viewButton->show();
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} else if (!hoveredIndex().isValid()) {
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m_downloadButton->hide();
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m_viewButton->hide();
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}
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painter->restore();
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// Text
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DanbooruPost *post = index.data().value<Danbooru::DanbooruPost *>();
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painter->save();
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int imageHeight = post->height();
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int imageWidth = post->width();
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KFormat format;
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QString imageText = i18n(
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"File size: %1",
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format.formatByteSize(post->size()));
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KLocalizedString sizestr = ki18np("1 pixel", "%1 pixels");
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imageText += "\n";
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imageText += i18n("Resolution: %1 x %2",
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sizestr.subs(imageWidth).toString(),
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sizestr.subs(imageHeight).toString());
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imageText += "\n";
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QString ratingString;
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switch (post->rating()) {
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case DanbooruPost::Safe:
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ratingString = i18n("Safe");
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break;
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case DanbooruPost::Questionable:
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ratingString = i18n("Questionable");
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break;
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case DanbooruPost::Explicit:
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ratingString = i18n("Explicit");
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break;
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default:
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ratingString = i18nc("Unknown post rating", "Unknown");
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}
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imageText += i18n("Rating: %1", ratingString);
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painter->drawText(textRect, imageText);
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painter->restore();
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}
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QSize DanbooruPostDelegate::sizeHint(const QStyleOptionViewItem &option,
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const QModelIndex &index) const
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{
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Q_UNUSED(option)
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if (!index.isValid()) {
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return QSize();
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}
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return m_itemView->gridSize();
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}
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QModelIndex DanbooruPostDelegate::hoveredIndex() const
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{
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const QPoint pos = m_itemView->viewport()->mapFromGlobal(QCursor::pos());
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return m_itemView->indexAt(pos);
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}
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void DanbooruPostDelegate::downloadButtonClicked()
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{
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QModelIndex index = hoveredIndex();
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if (!index.isValid()) {
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return;
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}
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QVariant data = index.data(Qt::DisplayRole);
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const DanbooruPost *post = data.value<DanbooruPost *>();
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if (post) {
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Q_EMIT(postDownloadRequested(post->fileUrl()));
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}
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}
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void DanbooruPostDelegate::viewButtonClicked()
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{
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QModelIndex index = hoveredIndex();
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if (!index.isValid()) {
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return;
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}
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QVariant data = index.data(Qt::DisplayRole);
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const DanbooruPost *post = data.value<DanbooruPost *>();
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if (post) {
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Q_EMIT(postViewRequested(post->fileUrl()));
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}
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}
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} // namespace Danbooru
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@ -1,100 +0,0 @@
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/*
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* This file is part of Danbooru Client.
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* Copyright 2013 Luca Beltrame <lbeltrame@kde.org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License or (at your option) version 3 or any later version
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* accepted by the membership of KDE e.V. (or its successor approved
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* by the membership of KDE e.V.), which shall act as a proxy
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* defined in Section 14 of version 3 of the license.
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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef DANBOORUPOSTDELEGATE_H
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#define DANBOORUPOSTDELEGATE_H
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/**
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* @brief This file includes custom delegates to represent DanbooruItems.
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* @file danboorupostdelegate.h
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*
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**/
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#include <QStyledItemDelegate>
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#include <QUrl>
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class QListView;
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class QPainter;
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class QPushButton;
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namespace Danbooru
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{
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/**
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* @brief Specific delegate for Danbooru items.
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*
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*/
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class DanbooruPost;
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class DanbooruPostDelegate : public QStyledItemDelegate
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{
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Q_OBJECT
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public:
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DanbooruPostDelegate(QListView *itemView);
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void paint(QPainter *painter, const QStyleOptionViewItem &option,
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const QModelIndex &index) const;
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QSize sizeHint(const QStyleOptionViewItem &option,
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const QModelIndex &index) const;
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QModelIndex hoveredIndex() const;
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private:
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QListView *m_itemView;
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QPushButton *m_downloadButton;
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QPushButton *m_viewButton;
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int m_buttonSize;
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static const int MARGIN;
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Q_SIGNALS:
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/**
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* @brief Emitted when the view button is clicked.
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*
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* @param postUrl the URL to the full picture.
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*
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*/
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void postViewRequested(QUrl postUrl);
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/**
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* @brief Emitted when the download button is clicked.
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*
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* @param postUrl the URL to the full picture.
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*
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*/
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void postDownloadRequested(QUrl postUrl);
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private Q_SLOTS:
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void viewButtonClicked();
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void downloadButtonClicked();
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};
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} // namespace Danbooru
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#endif // DANBOORUPOSTDELEGATE_H
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