473 lines
16 KiB
C++
473 lines
16 KiB
C++
/*
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Copyright 2007 Robert Knight <robertknight@gmail.com>
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Copyright 2007 Kevin Ottens <ervin@kde.org>
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Copyright 2008 Marco Martin <notmart@gmail.com>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library 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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with this library; see the file COPYING.LIB. 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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// Own
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#include "delegate.h"
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#include <cmath>
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#include <math.h>
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// Qt
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#include <QApplication>
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#include <QFontMetrics>
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#include <QIcon>
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#include <QModelIndex>
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#include <QPainter>
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#include <QStyleOptionViewItem>
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// KDE
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#include <kcolorutils.h>
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#include <kdebug.h>
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#include <kglobal.h>
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#include <kglobalsettings.h>
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#include <kcolorscheme.h>
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// plasma
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#include <plasma/paintutils.h>
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#include <plasma/framesvg.h>
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namespace Plasma
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{
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class DelegatePrivate
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{
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public:
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DelegatePrivate() { }
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~DelegatePrivate() { }
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QFont fontForSubTitle(const QFont &titleFont) const;
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QRect titleRect(const QStyleOptionViewItem &option, const QModelIndex &index) const;
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QRect subTitleRect(const QStyleOptionViewItem &option, const QModelIndex &index) const;
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QMap<int, int> roles;
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static const int ICON_TEXT_MARGIN = 10;
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static const int TEXT_RIGHT_MARGIN = 5;
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static const int ACTION_ICON_SIZE = 22;
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static const int ITEM_LEFT_MARGIN = 5;
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static const int ITEM_RIGHT_MARGIN = 5;
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static const int ITEM_TOP_MARGIN = 5;
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static const int ITEM_BOTTOM_MARGIN = 5;
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bool m_showToolTip;
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FrameSvg *svg;
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};
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QFont DelegatePrivate::fontForSubTitle(const QFont &titleFont) const
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{
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QFont subTitleFont = titleFont;
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subTitleFont.setPointSize(qMax(subTitleFont.pointSize() - 2,
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KGlobalSettings::smallestReadableFont().pointSize()));
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return subTitleFont;
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}
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QRect DelegatePrivate::titleRect(const QStyleOptionViewItem &option, const QModelIndex &index) const
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{
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QFont font(option.font);
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font.setBold(true);
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QFontMetrics fm(font);
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Qt::Alignment textAlignment =
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option.decorationAlignment & Qt::AlignRight ? Qt::AlignRight : Qt::AlignLeft;
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QRect emptyRect;
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if (option.direction == Qt::LeftToRight) {
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emptyRect = option.rect.adjusted(
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option.decorationSize.width() + ICON_TEXT_MARGIN + ITEM_LEFT_MARGIN,
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ITEM_TOP_MARGIN, -ITEM_RIGHT_MARGIN, -ITEM_BOTTOM_MARGIN);
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} else {
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emptyRect = option.rect.adjusted(
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ITEM_LEFT_MARGIN, ITEM_TOP_MARGIN,
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-ITEM_RIGHT_MARGIN - option.decorationSize.width() - ICON_TEXT_MARGIN, -ITEM_BOTTOM_MARGIN);
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}
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if (emptyRect.width() < 0) {
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emptyRect.setWidth(0);
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return emptyRect;
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}
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QRect textRect = QStyle::alignedRect(
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option.direction,
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textAlignment,
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fm.boundingRect(index.data(Qt::DisplayRole).toString()).size(),
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emptyRect);
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textRect.setWidth(textRect.width() + TEXT_RIGHT_MARGIN);
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textRect.setHeight(emptyRect.height() / 2);
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return textRect;
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}
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QRect DelegatePrivate::subTitleRect(const QStyleOptionViewItem &option,
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const QModelIndex &index) const
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{
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QString subTitle = index.data(roles[Delegate::SubTitleRole]).toString();
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QFontMetrics fm(fontForSubTitle(option.font));
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QRect textRect = titleRect(option, index);
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int right = textRect.right();
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//if title=subtitle subtitle won't be displayed
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if (subTitle != index.data(Qt::DisplayRole).toString()) {
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textRect.setWidth(fm.width(" " + subTitle) + TEXT_RIGHT_MARGIN);
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} else {
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textRect.setWidth(0);
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}
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textRect.translate(0, textRect.height());
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if (option.direction == Qt::RightToLeft) {
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textRect.moveRight(right);
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}
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return textRect;
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}
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Delegate::Delegate(QObject *parent)
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: QAbstractItemDelegate(parent),
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d(new DelegatePrivate)
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{
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d->svg = new FrameSvg(this);
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d->svg->setImagePath("widgets/viewitem");
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d->svg->setElementPrefix("hover");
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}
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Delegate::~Delegate()
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{
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delete d;
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}
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void Delegate::setRoleMapping(SpecificRoles role, int actual)
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{
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d->roles[role] = actual;
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}
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int Delegate::roleMapping(SpecificRoles role) const
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{
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return d->roles[role];
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}
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QRect Delegate::rectAfterTitle(const QStyleOptionViewItem &option, const QModelIndex &index) const
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{
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QRect textRect = d->titleRect(option, index);
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QRect emptyRect(0, textRect.top(), option.rect.width() - textRect.width() - DelegatePrivate::ITEM_LEFT_MARGIN - DelegatePrivate::ITEM_RIGHT_MARGIN - option.decorationSize.width() - DelegatePrivate::ICON_TEXT_MARGIN, textRect.height());
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if (option.direction == Qt::LeftToRight) {
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emptyRect.moveLeft(textRect.right());
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} else {
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emptyRect.moveRight(textRect.left());
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}
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if (emptyRect.width() < 0) {
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emptyRect.setWidth(0);
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}
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return emptyRect;
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}
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QRect Delegate::rectAfterSubTitle(const QStyleOptionViewItem &option, const QModelIndex &index) const
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{
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QRect textRect = d->subTitleRect(option, index);
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QRect emptyRect(0, textRect.top(), option.rect.width() - textRect.width() - DelegatePrivate::ITEM_LEFT_MARGIN - DelegatePrivate::ITEM_RIGHT_MARGIN - option.decorationSize.width() - DelegatePrivate::ICON_TEXT_MARGIN, textRect.height());
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if (option.direction == Qt::LeftToRight) {
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emptyRect.moveLeft(textRect.right());
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} else {
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emptyRect.moveRight(textRect.left());
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}
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if (emptyRect.width() < 0) {
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emptyRect.setWidth(0);
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}
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return emptyRect;
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}
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QRect Delegate::emptyRect(const QStyleOptionViewItem &option, const QModelIndex &index) const
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{
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QRect afterTitleRect = rectAfterTitle(option, index);
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QRect afterSubTitleRect = rectAfterSubTitle(option, index);
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afterTitleRect.setHeight(afterTitleRect.height() * 2);
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afterSubTitleRect.setTop(afterTitleRect.top());
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return afterTitleRect.intersected(afterSubTitleRect);
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}
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void Delegate::paint(QPainter *painter, const QStyleOptionViewItem &option,
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const QModelIndex &index) const
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{
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const bool hover = option.state & (QStyle::State_MouseOver | QStyle::State_Selected);
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QRect contentRect = option.rect;
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contentRect.setBottom(contentRect.bottom() - 1);
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QRect decorationRect =
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QStyle::alignedRect(option.direction,
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option.decorationPosition == QStyleOptionViewItem::Left ?
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Qt::AlignLeft : Qt::AlignRight,
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option.decorationSize,
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contentRect.adjusted(DelegatePrivate::ITEM_LEFT_MARGIN, DelegatePrivate::ITEM_TOP_MARGIN, -DelegatePrivate::ITEM_RIGHT_MARGIN, -DelegatePrivate::ITEM_BOTTOM_MARGIN));
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decorationRect.moveTop(contentRect.top() + qMax(0, (contentRect.height() - decorationRect.height())) / 2);
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QString titleText = index.data(Qt::DisplayRole).value<QString>();
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QString subTitleText = index.data(d->roles[SubTitleRole]).value<QString>();
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QRect titleRect = d->titleRect(option, index);
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titleRect.moveTopLeft(titleRect.topLeft()-option.rect.topLeft());
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QRect subTitleRect = d->subTitleRect(option, index);
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subTitleRect.moveTopLeft(subTitleRect.topLeft()-option.rect.topLeft());
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bool uniqueTitle = !index.data(d->roles[SubTitleMandatoryRole]).value<bool>();// true;
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if (uniqueTitle) {
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QModelIndex sib = index.sibling(index.row() + 1, index.column());
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if (sib.isValid()) {
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uniqueTitle = sib.data(Qt::DisplayRole).value<QString>() != titleText;
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}
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if (uniqueTitle) {
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sib = index.sibling(index.row() + -1, index.column());
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if (sib.isValid()) {
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uniqueTitle = sib.data(Qt::DisplayRole).value<QString>() != titleText;
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}
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}
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}
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if (subTitleText == titleText) {
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subTitleText.clear();
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}
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QFont subTitleFont = d->fontForSubTitle(option.font);
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QFont titleFont(option.font);
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// draw icon
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QIcon decorationIcon = index.data(Qt::DecorationRole).value<QIcon>();
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if (index.data(d->roles[ColumnTypeRole]).toInt() == SecondaryActionColumn) {
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if (hover) {
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// Only draw on hover
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const int delta = floor((qreal)(option.decorationSize.width() - DelegatePrivate::ACTION_ICON_SIZE) / 2.0);
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decorationRect.adjust(delta, delta-1, -delta-1, -delta);
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decorationIcon.paint(painter, decorationRect, option.decorationAlignment);
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}
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} else {
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// as default always draw as main column
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decorationIcon.paint(painter, decorationRect, option.decorationAlignment);
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}
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QPixmap buffer(option.rect.size());
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buffer.fill(Qt::transparent);
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QPainter p(&buffer);
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// draw title
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p.setFont(titleFont);
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if (option.palette.color(QPalette::Base).alpha() > 0) {
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p.setPen(QPen(KColorScheme(QPalette::Active).foreground(KColorScheme::NormalText), 1));
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} else {
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p.setPen(Plasma::Theme::defaultTheme()->color(Plasma::Theme::TextColor));
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}
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p.drawText(titleRect, Qt::AlignLeft|Qt::AlignVCenter, titleText);
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if (hover || !uniqueTitle) {
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// draw sub-title, BUT only if:
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// * it isn't a unique title, this allows two items to have the same title and be
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// disambiguated by their subtitle
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// * we are directed by the model that this item should never be treated as unique
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// e.g. the documents list in the recently used tab
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// * the mouse is hovered over the item, causing the additional information to be
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// displayed
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//
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// the rational for this is that subtitle text should in most cases not be
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// required to understand the item itself and that showing all the subtexts in a
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// listing makes the information density very high, impacting both the speed at
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// which one can scan the list visually and the aesthetic qualities of the listing.
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if (option.palette.color(QPalette::Base).alpha() > 0) {
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p.setPen(QPen(KColorScheme(QPalette::Active).foreground(KColorScheme::InactiveText), 1));
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} else {
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QColor textColor = Plasma::Theme::defaultTheme()->color(Plasma::Theme::TextColor);
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textColor.setAlphaF(0.6);
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p.setPen(textColor);
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}
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p.setFont(subTitleFont);
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p.drawText(subTitleRect, Qt::AlignLeft|Qt::AlignVCenter, " " + subTitleText);
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}
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p.end();
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d->m_showToolTip = false;
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const QColor gradientColor = KColorScheme(QPalette::Active).background(KColorScheme::NormalBackground).color();
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if (option.direction == Qt::LeftToRight) {
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if (((titleRect.width() + decorationRect.width() + 10) > option.rect.width() ||
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(subTitleRect.width() + decorationRect.width() + 15) > option.rect.width()) &&
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(titleRect.width() > 120 || subTitleRect.width() > 120)) {
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QPainter p(&buffer);
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p.setCompositionMode(QPainter::CompositionMode_DestinationOut);
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p.setPen(Qt::NoPen);
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QLinearGradient gr;
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QRect gradientRect(option.rect.width() - 30, titleRect.y(),
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80, titleRect.height() + subTitleRect.height());
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// draw it on the right side
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gr.setStart(gradientRect.topLeft());
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gr.setFinalStop(gradientRect.topRight());
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gr.setColorAt(0.0, Qt::transparent);
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gr.setColorAt(0.7, gradientColor);
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p.setBrush(QBrush(gr));
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p.drawRect(gradientRect);
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d->m_showToolTip = true;
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p.end();
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}
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} else {
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if (((titleRect.width() + decorationRect.width() + 10) > option.rect.width() ||
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(subTitleRect.width() + decorationRect.width() + 15 )> option.rect.width()) &&
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(titleRect.width() > 120 || subTitleRect.width() > 120)) {
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buffer.fill(Qt::transparent);
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QPainter p(&buffer);
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p.setCompositionMode(QPainter::CompositionMode_DestinationOut);
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p.setPen(Qt::NoPen);
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QLinearGradient gr;
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QRect gradientRect(option.rect.x() - 25, titleRect.y(),
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60, titleRect.height() + subTitleRect.height());
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gr.setStart(gradientRect.topRight());
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gr.setFinalStop(gradientRect.topLeft());
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gr.setColorAt(0.0, Qt::transparent);
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gr.setColorAt(0.6, gradientColor);
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p.setBrush(QBrush(gr));
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p.drawRect(gradientRect);
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d->m_showToolTip = true;
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p.end();
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}
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}
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painter->drawPixmap(option.rect, buffer, buffer.rect());
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if (hover) {
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painter->save();
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painter->setRenderHint(QPainter::Antialiasing);
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const int column = index.column();
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const int columns = index.model()->columnCount();
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const int roundedRadius = 5;
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// use a slightly translucent version of the palette's highlight color
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// for the background
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QColor backgroundColor = option.palette.color(QPalette::Highlight);
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backgroundColor.setAlphaF(0.2);
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QColor backgroundColor2 = option.palette.color(QPalette::Highlight);
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backgroundColor2.setAlphaF(0.5);
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QRect highlightRect = option.rect.adjusted(2, 2, -2, -2);
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QPen outlinePen(backgroundColor, 2);
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if (column == 0) {
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//clip right (or left for rtl languages) to make the connection with the next column
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if (columns > 1) {
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if (option.direction == Qt::LeftToRight) {
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painter->setClipRect(option.rect);
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highlightRect.adjust(0, 0, roundedRadius, 0);
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} else {
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painter->setClipRect(option.rect);
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highlightRect.adjust(-roundedRadius, 0, 0, 0);
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}
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}
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QLinearGradient gradient(highlightRect.topLeft(), highlightRect.topRight());
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//reverse the gradient
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if (option.direction == Qt::RightToLeft) {
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gradient.setStart(highlightRect.topRight());
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gradient.setFinalStop(highlightRect.topLeft());
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}
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gradient.setColorAt(0, backgroundColor);
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gradient.setColorAt(((qreal)titleRect.width()/3.0) / (qreal)highlightRect.width(), backgroundColor2);
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gradient.setColorAt(0.7, backgroundColor);
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outlinePen.setBrush(gradient);
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//last column, clip left (right for rtl)
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} else if (column == columns-1) {
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if (option.direction == Qt::LeftToRight) {
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painter->setClipRect(option.rect);
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highlightRect.adjust(-roundedRadius, 0, 0, 0);
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} else {
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painter->setClipRect(option.rect);
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highlightRect.adjust(0, 0, +roundedRadius, 0);
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}
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//column < columns-1; clip both ways
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} else {
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painter->setClipRect(option.rect);
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highlightRect.adjust(-roundedRadius, 0, +roundedRadius, 0);
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}
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//if the view is transparent paint as plasma, otherwise paint with kde colors
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if (option.palette.color(QPalette::Base).alpha() > 0) {
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painter->setPen(outlinePen);
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painter->drawPath(PaintUtils::roundedRectangle(highlightRect, roundedRadius));
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} else {
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d->svg->resizeFrame(highlightRect.size());
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d->svg->paintFrame(painter, highlightRect.topLeft());
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}
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painter->restore();
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}
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}
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QSize Delegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
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{
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Q_UNUSED(index)
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QSize size = option.rect.size();
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QFontMetrics metrics(option.font);
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QFontMetrics subMetrics(d->fontForSubTitle(option.font));
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size.setHeight(qMax(option.decorationSize.height(), qMax(size.height(), metrics.height() + subMetrics.ascent()) + 3) + 4);
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// kDebug() << "size hint is" << size << (metrics.height() + subMetrics.ascent());
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size *= 1.1;
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return size;
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}
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bool Delegate::showToolTip() const
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{
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return d->m_showToolTip;
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}
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}
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#include "delegate.moc"
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