100 lines
3.2 KiB
C++
100 lines
3.2 KiB
C++
/*
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* Cantata
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*
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* Copyright (c) 2011-2013 Craig Drummond <craig.p.drummond@gmail.com>
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*
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* ----
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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 2 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 GNU
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* 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; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "basicitemdelegate.h"
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#include <QPainter>
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#include <QStyle>
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#include <QStyledItemDelegate>
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static void drawLine(QPainter *p, const QRect &r, const QColor &color, bool fadeStart, bool fadeEnd)
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{
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static const double constAlpha=0.1;
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QColor col(color);
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QLinearGradient grad(r.bottomLeft(), r.bottomRight());
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if (fadeStart || fadeEnd) {
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double fadeSize=(fadeStart && fadeEnd ? 64.0 : 32.0);
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if (r.width()<(2.2*fadeSize)) {
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fadeSize=r.width()/3.0;
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}
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double fadePos=fadeSize/r.width();
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col.setAlphaF(fadeStart ? 0.0 : constAlpha);
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grad.setColorAt(0, col);
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col.setAlphaF(constAlpha);
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grad.setColorAt(fadePos, col);
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grad.setColorAt(1.0-fadePos, col);
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col.setAlphaF(fadeEnd ? 0.0 : constAlpha);
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grad.setColorAt(1, col);
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p->setPen(QPen(grad, 1));
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} else {
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col.setAlphaF(constAlpha);
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p->setPen(QPen(col, 1));
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}
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p->drawLine(r.bottomLeft(), r.bottomRight());
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}
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BasicItemDelegate::BasicItemDelegate(QObject *p)
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: QStyledItemDelegate(p)
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{
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}
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BasicItemDelegate::~BasicItemDelegate()
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{
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}
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void BasicItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, 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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bool selected=option.state&QStyle::State_Selected;
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bool active=option.state&QStyle::State_Active;
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QStyledItemDelegate::paint(painter, option, index);
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QColor col(option.palette.color(active ? QPalette::Active : QPalette::Inactive,
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selected ? QPalette::HighlightedText : QPalette::Text));
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if (4==option.version) {
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const QStyleOptionViewItemV4 &v4=(QStyleOptionViewItemV4 &)option;
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switch (v4.viewItemPosition) {
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case QStyleOptionViewItemV4::Beginning:
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drawLine(painter, option.rect, col, true, false);
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break;
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case QStyleOptionViewItemV4::Middle:
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drawLine(painter, option.rect, col, false, false);
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break;
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case QStyleOptionViewItemV4::End:
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drawLine(painter, option.rect, col, false, true);
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break;
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case QStyleOptionViewItemV4::Invalid:
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case QStyleOptionViewItemV4::OnlyOne:
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drawLine(painter, option.rect, col, true, true);
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}
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} else {
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drawLine(painter, option.rect, col, false, false);
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}
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}
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