126 lines
3.2 KiB
C++
126 lines
3.2 KiB
C++
/*
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* Squawk messenger.
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* Copyright (C) 2019 Yury Gubich <blue@macaw.me>
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*
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* This program 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 3 of the License, or
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* (at your option) any later version.
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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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#include "feedview.h"
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#include <QPaintEvent>
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#include <QPainter>
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#include <QDebug>
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FeedView::FeedView(QWidget* parent):
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QAbstractItemView(parent),
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hints()
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{
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}
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FeedView::~FeedView()
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{
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}
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QModelIndex FeedView::indexAt(const QPoint& point) const
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{
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return QModelIndex();
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}
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void FeedView::scrollTo(const QModelIndex& index, QAbstractItemView::ScrollHint hint)
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{
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}
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QRect FeedView::visualRect(const QModelIndex& index) const
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{
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if (!index.isValid() || index.row() >= hints.size()) {
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return QRect();
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} else {
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const Hint& hint = hints.at(index.row());
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const QWidget* vp = viewport();
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return QRect(0, vp->height() - hint.height - hint.offset, vp->width(), hint.height);
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}
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}
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int FeedView::horizontalOffset() const
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{
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return 0;
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}
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bool FeedView::isIndexHidden(const QModelIndex& index) const
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{
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return true;
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}
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QModelIndex FeedView::moveCursor(QAbstractItemView::CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
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{
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return QModelIndex();
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}
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void FeedView::setSelection(const QRect& rect, QItemSelectionModel::SelectionFlags command)
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{
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}
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int FeedView::verticalOffset() const
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{
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return 0;
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}
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QRegion FeedView::visualRegionForSelection(const QItemSelection& selection) const
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{
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return QRegion();
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}
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void FeedView::rowsInserted(const QModelIndex& parent, int start, int end)
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{
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scheduleDelayedItemsLayout();
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QAbstractItemView::rowsInserted(parent, start, end);
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}
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void FeedView::updateGeometries()
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{
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qDebug() << "updateGeometries";
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QAbstractItemView::updateGeometries();
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const QAbstractItemModel* m = model();
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QStyleOptionViewItem option = viewOptions();
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uint32_t previousOffset = 0;
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hints.clear();
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for (int i = 0, size = m->rowCount(); i < size; ++i) {
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QModelIndex index = m->index(i, 0, QModelIndex());
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int height = itemDelegate(index)->sizeHint(option, index).height();
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hints.emplace_back(Hint({
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false,
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previousOffset,
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static_cast<uint32_t>(height)
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}));
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previousOffset += height;
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}
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}
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void FeedView::paintEvent(QPaintEvent* event)
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{
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qDebug() << "paint";
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const QAbstractItemModel* m = model();
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QRect zone = event->rect().translated(horizontalOffset(), -verticalOffset());
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QPainter painter(viewport());
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QStyleOptionViewItem option = viewOptions();
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for (int i = 0, size = m->rowCount(); i < size; ++i) {
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QModelIndex index = m->index(i, 0, QModelIndex());
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option.rect = visualRect(index);
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itemDelegate(index)->paint(&painter, option, index);
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}
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}
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