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So long, custom C++ delegate: you won't be missed

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Luca Beltrame 2015-02-21 14:57:50 +01:00
parent 8b56570223
commit 5d9988feed
2 changed files with 0 additions and 358 deletions
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258
src/model/danboorupostdelegate.cpp
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/*
* <one line to give the library's name and an idea of what it does.>
* Copyright 2013 Luca Beltrame <lbeltrame@kde.org>
*
* 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 2 of
* the License or (at your option) version 3 or any later version
* accepted by the membership of KDE e.V. (or its successor approved
* by the membership of KDE e.V.), which shall act as a proxy
* defined in Section 14 of version 3 of the license.
*
* 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/>.
*
*/
// Own
#include "danboorupostdelegate.h"
#include "libdanbooru/danboorupost.h"
// Qt
#include <QListView>
#include <QPainter>
#include <QApplication>
// KDE
#include <QPushButton>
#include <KLocalizedString>
#include <KIconLoader>
#include <KFormat>
namespace Danbooru
{
const int DanbooruPostDelegate::MARGIN = 5;
DanbooruPostDelegate::DanbooruPostDelegate(QListView *itemView): QStyledItemDelegate(itemView),
m_itemView(itemView)
{
// Get the sizes for the buttons
const int iconSize = KIconLoader::global()->currentSize(
KIconLoader::Toolbar
);
const QSize sz = itemView->style()->sizeFromContents(
QStyle::CT_ToolButton, 0,
QSize(iconSize, iconSize));
m_buttonSize = qMax(sz.width(), sz.height());
m_downloadButton = new QPushButton(QIcon::fromTheme("download"),
QString(), itemView);
m_viewButton = new QPushButton(QIcon::fromTheme("view-preview"), QString(),
itemView);
m_downloadButton->hide();
m_viewButton->hide();
m_downloadButton->resize(m_buttonSize, m_buttonSize);
m_viewButton->resize(m_buttonSize, m_buttonSize);
m_downloadButton->setToolTip(i18n("Download image"));
m_viewButton->setToolTip(i18n("View image"));
// Signal-slot connections
connect(m_viewButton, &QPushButton::clicked, this, &DanbooruPostDelegate::viewButtonClicked);
connect(m_downloadButton, &QPushButton::clicked, this, &DanbooruPostDelegate::downloadButtonClicked);
}
void DanbooruPostDelegate::paint(QPainter *painter,
const QStyleOptionViewItem &option,
const QModelIndex &index) const
{
if (!index.isValid()) {
return;
}
QStyleOptionViewItemV4 opt(option);
// Pixmap
QStyle *style = QApplication::style();
style->drawPrimitive(QStyle::PE_PanelItemViewItem, &opt, painter, 0);
painter->setRenderHint(QPainter::Antialiasing);
QPixmap pixmap = index.data(Qt::DecorationRole).value<QPixmap>();
if (pixmap.isNull()) {
return;
}
QRect rect = opt.rect;
QFontMetrics metrics = opt.fontMetrics;
QRect textRect(rect.left() + MARGIN, rect.bottom() - 3 * metrics.height(),
rect.width(), 3 * metrics.height());
// Scaling is unavoidable to keep things in the right dimension
QPixmap scaled;
// Reserve enough space for the pixmap + the 3 lines of text:
// this prevents issues with images that have height > width
// (like in yande.re which keeps a lot of scans)
int maxHeight = rect.height() - 3 * metrics.height() - 2 * MARGIN;
scaled = pixmap.scaled(rect.width() - 2 * MARGIN,
maxHeight,
Qt::KeepAspectRatio,
Qt::SmoothTransformation);
QRect pixRect = scaled.rect();
pixRect.moveCenter(rect.center());
// move the pixmap up to accomodate some lines of text
pixRect.moveTo(pixRect.left(),
pixRect.top() - textRect.height() / 2);
pixRect.moveBottom(textRect.top() - MARGIN);
painter->drawPixmap(pixRect, scaled);
painter->save();
// Show buttons on mouseover
if (option.state & QStyle::State_MouseOver) {
// Get the bottom coordinate for the buttons
// TODO: Perhaps add some transition?
m_downloadButton->move(pixRect.topLeft());
m_viewButton->move(pixRect.bottomLeft() - QPoint(
0, m_viewButton->height() - 1.5 * MARGIN));
m_downloadButton->show();
m_viewButton->show();
} else if (!hoveredIndex().isValid()) {
m_downloadButton->hide();
m_viewButton->hide();
}
painter->restore();
// Text
DanbooruPost *post = index.data().value<Danbooru::DanbooruPost *>();
painter->save();
int imageHeight = post->height();
int imageWidth = post->width();
KFormat format;
QString imageText = i18n(
"File size: %1",
format.formatByteSize(post->size()));
KLocalizedString sizestr = ki18np("1 pixel", "%1 pixels");
imageText += "\n";
imageText += i18n("Resolution: %1 x %2",
sizestr.subs(imageWidth).toString(),
sizestr.subs(imageHeight).toString());
imageText += "\n";
QString ratingString;
switch (post->rating()) {
case DanbooruPost::Safe:
ratingString = i18n("Safe");
break;
case DanbooruPost::Questionable:
ratingString = i18n("Questionable");
break;
case DanbooruPost::Explicit:
ratingString = i18n("Explicit");
break;
default:
ratingString = i18nc("Unknown post rating", "Unknown");
}
imageText += i18n("Rating: %1", ratingString);
painter->drawText(textRect, imageText);
painter->restore();
}
QSize DanbooruPostDelegate::sizeHint(const QStyleOptionViewItem &option,
const QModelIndex &index) const
{
Q_UNUSED(option)
if (!index.isValid()) {
return QSize();
}
return m_itemView->gridSize();
}
QModelIndex DanbooruPostDelegate::hoveredIndex() const
{
const QPoint pos = m_itemView->viewport()->mapFromGlobal(QCursor::pos());
return m_itemView->indexAt(pos);
}
void DanbooruPostDelegate::downloadButtonClicked()
{
QModelIndex index = hoveredIndex();
if (!index.isValid()) {
return;
}
QVariant data = index.data(Qt::DisplayRole);
const DanbooruPost *post = data.value<DanbooruPost *>();
if (post) {
Q_EMIT(postDownloadRequested(post->fileUrl()));
}
}
void DanbooruPostDelegate::viewButtonClicked()
{
QModelIndex index = hoveredIndex();
if (!index.isValid()) {
return;
}
QVariant data = index.data(Qt::DisplayRole);
const DanbooruPost *post = data.value<DanbooruPost *>();
if (post) {
Q_EMIT(postViewRequested(post->fileUrl()));
}
}
} // namespace Danbooru

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src/model/danboorupostdelegate.h
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/*
* This file is part of Danbooru Client.
* Copyright 2013 Luca Beltrame <lbeltrame@kde.org>
*
* 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 2 of
* the License or (at your option) version 3 or any later version
* accepted by the membership of KDE e.V. (or its successor approved
* by the membership of KDE e.V.), which shall act as a proxy
* defined in Section 14 of version 3 of the license.
*
* 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/>.
*
*/
#ifndef DANBOORUPOSTDELEGATE_H
#define DANBOORUPOSTDELEGATE_H
/**
* @brief This file includes custom delegates to represent DanbooruItems.
* @file danboorupostdelegate.h
*
**/
#include <QStyledItemDelegate>
#include <QUrl>
class QListView;
class QPainter;
class QPushButton;
namespace Danbooru
{
/**
* @brief Specific delegate for Danbooru items.
*
*/
class DanbooruPost;
class DanbooruPostDelegate : public QStyledItemDelegate
{
Q_OBJECT
public:
DanbooruPostDelegate(QListView *itemView);
void paint(QPainter *painter, const QStyleOptionViewItem &option,
const QModelIndex &index) const;
QSize sizeHint(const QStyleOptionViewItem &option,
const QModelIndex &index) const;
QModelIndex hoveredIndex() const;
private:
QListView *m_itemView;
QPushButton *m_downloadButton;
QPushButton *m_viewButton;
int m_buttonSize;
static const int MARGIN;
Q_SIGNALS:
/**
* @brief Emitted when the view button is clicked.
*
* @param postUrl the URL to the full picture.
*
*/
void postViewRequested(QUrl postUrl);
/**
* @brief Emitted when the download button is clicked.
*
* @param postUrl the URL to the full picture.
*
*/
void postDownloadRequested(QUrl postUrl);
private Q_SLOTS:
void viewButtonClicked();
void downloadButtonClicked();
};
} // namespace Danbooru
#endif // DANBOORUPOSTDELEGATE_H