376 lines
12 KiB
C++
376 lines
12 KiB
C++
/*
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* Cantata
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*
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* Copyright (c) 2011 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 "itemview.h"
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#include "covers.h"
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#include <QtGui/QIcon>
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#include <QtGui/QToolButton>
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#include <QtGui/QStyledItemDelegate>
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#include <QtGui/QStyle>
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#include <QtGui/QStyleOptionViewItem>
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#include <QtGui/QPainter>
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#include <QtGui/QAction>
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#include <QtGui/QRadialGradient>
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static void drawGlow(QPainter *painter, const QRect &rOrig)
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{
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QRect r=rOrig.adjusted(-2, -2, 2, 2);
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QRadialGradient gradient(QPointF(r.x()+r.width()/2.0, r.y()+r.height()/2.0), r.width()/2.0, QPointF(r.x()+r.width()/2.0, r.y()+r.height()/2.0));
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QColor c(Qt::white);
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c.setAlphaF(0.65);
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gradient.setColorAt(0, c);
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gradient.setColorAt(0.5, c);
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c.setAlphaF(0.0);
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gradient.setColorAt(1.0, c);
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painter->fillRect(r, gradient);
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}
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class ItemDelegate : public QStyledItemDelegate
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{
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public:
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static const int constBorder = 1;
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static const int constActionBorder = 2;
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static const int constActionIconSize=16;
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ItemDelegate(QObject *p, QAction *a1, QAction *a2)
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: QStyledItemDelegate(p)
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, act1(a1)
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, act2(a2)
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{
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}
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virtual ~ItemDelegate()
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{
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}
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QSize sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
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{
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QSize sz(QStyledItemDelegate::sizeHint(option, index));
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int imageSize = index.data(ItemView::Role_IconSize).toInt();
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bool oneLine = index.data(ItemView::Role_SubText).toString().isEmpty();
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int textHeight = QApplication::fontMetrics().height()*(oneLine ? 1 : 2);
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return QSize(qMax(64, imageSize) + (constBorder * 2),
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qMax(qMax(textHeight, sz.height()), imageSize) + (constBorder*2));
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}
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void 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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QApplication::style()->drawPrimitive(QStyle::PE_PanelItemViewItem, &option, painter, 0L);
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QString text = index.data(Qt::DisplayRole).toString();
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QRect r(option.rect);
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QString childText = index.data(ItemView::Role_SubText).toString();
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QPixmap pix = index.data(ItemView::Role_Pixmap).value<QPixmap>();
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bool oneLine = childText.isEmpty();
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r.adjust(constBorder, 0, -constBorder, 0);
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if (!pix.isNull()) {
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painter->drawPixmap(r.x(), r.y()+((r.height()-pix.height())/2), pix.width(), pix.height(), pix);
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r.adjust(pix.width()+3, 0, -3, 0);
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}
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QFont textFont(QApplication::font());
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QFontMetrics textMetrics(textFont);
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QRect textRect;
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int textHeight=textMetrics.height();
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bool selected=option.state&QStyle::State_Selected;
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QColor color(QApplication::palette().color(selected ? QPalette::HighlightedText : QPalette::Text));
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if (oneLine) {
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textRect=QRect(r.x(), r.y()+((r.height()-textHeight)/2), r.width(), textHeight);
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text = textMetrics.elidedText(text, Qt::ElideRight, textRect.width(), QPalette::WindowText);
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painter->setPen(color);
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painter->setFont(textFont);
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painter->drawText(textRect, text);
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} else {
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QFont childFont(QApplication::font());
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childFont.setPointSizeF(childFont.pointSizeF()*0.8);
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QFontMetrics childMetrics(childFont);
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QRect childRect;
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int childHeight=childMetrics.height();
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int totalHeight=textHeight+childHeight;
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textRect=QRect(r.x(), r.y()+((r.height()-totalHeight)/2), r.width(), textHeight);
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childRect=QRect(r.x(), r.y()+textHeight+((r.height()-totalHeight)/2), r.width(), textHeight);
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text = textMetrics.elidedText(text, Qt::ElideRight, textRect.width(), QPalette::WindowText);
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painter->setPen(color);
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painter->setFont(textFont);
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painter->drawText(textRect, text);
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childText = childMetrics.elidedText(childText, Qt::ElideRight, childRect.width(), QPalette::WindowText);
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color.setAlphaF(selected ? 0.65 : 0.5);
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painter->setPen(color);
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painter->setFont(childFont);
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painter->drawText(childRect, childText);
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}
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if (option.state & QStyle::State_MouseOver) {
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if (act1 && r.width()>(constActionIconSize+(2*constActionBorder))) {
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pix=act1->icon().pixmap(QSize(constActionIconSize, constActionIconSize));
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if (!pix.isNull()) {
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QRect ir(r.x()+r.width()-(pix.width()+constActionBorder),
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r.y()+((r.height()-pix.height())/2),
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pix.width(), pix.height());
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drawGlow(painter, ir);
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painter->drawPixmap(ir, pix);
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r.adjust(0, 0, -(pix.width()+constActionBorder), 0);
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}
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}
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if (act2 && r.width()>(constActionIconSize+(2*constActionBorder))) {
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pix=act2->icon().pixmap(QSize(constActionIconSize, constActionIconSize));
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if (!pix.isNull()) {
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QRect ir(r.x()+r.width()-(pix.width()+constActionBorder),
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r.y()+((r.height()-pix.height())/2),
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pix.width(), pix.height());
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drawGlow(painter, ir);
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painter->drawPixmap(ir, pix);
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}
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}
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}
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}
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QAction *act1;
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QAction *act2;
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};
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ItemView::ItemView(QWidget *p)
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: QWidget(p)
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, itemModel(0)
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, act1(0)
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, act2(0)
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{
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setupUi(this);
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#ifdef ENABLE_KDE_SUPPORT
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backAction = new QAction(i18n("Back"), this);
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#else
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backAction = new QAction(tr("Back"), this);
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#endif
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backAction->setIcon(QIcon::fromTheme("go-previous"));
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backButton->setDefaultAction(backAction);
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backButton->setAutoRaise(true);
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treeView->setPageDefaults();
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}
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ItemView::~ItemView()
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{
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}
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void ItemView::init(QAction *a1, QAction *a2)
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{
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if (act1 || act2) {
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return;
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}
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act1=a1;
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act2=a2;
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listView->setItemDelegate(new ItemDelegate(this, a1, a2));
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connect(treeSearch, SIGNAL(returnPressed()), this, SIGNAL(searchItems()));
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connect(treeSearch, SIGNAL(textChanged(const QString)), this, SIGNAL(searchItems()));
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connect(listSearch, SIGNAL(returnPressed()), this, SIGNAL(searchItems()));
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connect(listSearch, SIGNAL(textChanged(const QString)), this, SIGNAL(searchItems()));
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connect(treeView, SIGNAL(itemsSelected(bool)), this, SIGNAL(itemsSelected(bool)));
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connect(treeView, SIGNAL(activated(const QModelIndex &)), this, SLOT(itemActivated(const QModelIndex &)));
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connect(treeView, SIGNAL(doubleClicked(const QModelIndex &)), this, SIGNAL(doubleClicked(const QModelIndex &)));
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connect(listView, SIGNAL(itemsSelected(bool)), this, SIGNAL(itemsSelected(bool)));
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connect(listView, SIGNAL(activated(const QModelIndex &)), this, SLOT(itemActivated(const QModelIndex &)));
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connect(listView, SIGNAL(doubleClicked(const QModelIndex &)), this, SIGNAL(doubleClicked(const QModelIndex &)));
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connect(listView, SIGNAL(clicked(const QModelIndex &)), this, SLOT(itemClicked(const QModelIndex &)));
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connect(backAction, SIGNAL(triggered(bool)), this, SLOT(backActivated()));
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usingTreeView=false;
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setView(true);
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}
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void ItemView::addAction(QAction *act)
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{
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treeView->addAction(act);
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listView->addAction(act);
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}
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void ItemView::setView(bool tree)
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{
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if (tree==usingTreeView) {
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return;
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}
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usingTreeView=tree;
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treeSearch->setText(QString());
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listSearch->setText(QString());
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if (tree) {
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treeView->setModel(itemModel);
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listView->setModel(0);
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} else {
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treeView->setModel(0);
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listView->setModel(itemModel);
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setLevel(0);
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listView->setRootIndex(QModelIndex());
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}
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stackedWidget->setCurrentIndex(tree ? 0 : 1);
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}
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void ItemView::setLevel(int l)
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{
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int prev=currentLevel;
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currentLevel=l;
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backAction->setEnabled(0!=l);
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if (view()->selectionModel()) {
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view()->selectionModel()->clearSelection();
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}
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#ifdef ENABLE_KDE_SUPPORT
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if (0==currentLevel) {
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listSearch->setPlaceholderText(i18n("Search %1...", topText));
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} else if (prev>currentLevel) {
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listSearch->setPlaceholderText(prevText);
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} else {
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prevText=listSearch->placeholderText();
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}
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#else
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if (0==currentLevel) {
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listSearch->setPlaceholderText(tr("Search %1...").arg(topText));
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} else if (prev>currentLevel) {
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listSearch->setPlaceholderText(prevText);
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} else {
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prevText=listSearch->placeholderText();
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}
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#endif
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}
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QAbstractItemView * ItemView::view() const
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{
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return usingTreeView ? (QAbstractItemView *)treeView : (QAbstractItemView *)listView;
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}
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void ItemView::setModel(QAbstractItemModel *m)
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{
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itemModel=m;
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view()->setModel(m);
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}
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QString ItemView::searchText() const
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{
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return usingTreeView ? treeSearch->text() : listSearch->text();
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}
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void ItemView::setTopText(const QString &text)
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{
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topText=text;
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if (0==currentLevel) {
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#ifdef ENABLE_KDE_SUPPORT
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listSearch->setPlaceholderText(i18n("Search %1...", topText));
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#else
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listSearch->setPlaceholderText(tr("Search %1...").arg(topText));
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#endif
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}
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#ifdef ENABLE_KDE_SUPPORT
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treeSearch->setPlaceholderText(i18n("Search %1...", topText));
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#else
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treeSearch->setPlaceholderText(tr("Search %1...").arg(topText));
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#endif
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}
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void ItemView::setUniformRowHeights(bool v)
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{
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treeView->setUniformRowHeights(v);
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}
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void ItemView::setAcceptDrops(bool v)
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{
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listView->setAcceptDrops(v);
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treeView->setAcceptDrops(v);
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}
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void ItemView::setDragDropOverwriteMode(bool v)
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{
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listView->setDragDropOverwriteMode(v);
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treeView->setDragDropOverwriteMode(v);
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}
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void ItemView::setDragDropMode(QAbstractItemView::DragDropMode v)
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{
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listView->setDragDropMode(v);
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treeView->setDragDropMode(v);
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}
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void ItemView::backActivated()
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{
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if (usingTreeView) {
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return;
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}
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setLevel(currentLevel-1);
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listView->setRootIndex(listView->rootIndex().parent());
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listView->scrollTo(prevTopIndex, QAbstractItemView::PositionAtTop);
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}
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QAction * ItemView::getAction(const QModelIndex &index)
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{
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QRect rect(listView->visualRect(index));
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rect.moveTo(listView->viewport()->mapToGlobal(QPoint(rect.x(), rect.y())));
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QRect actionRect(rect.x()+rect.width()-(ItemDelegate::constActionIconSize+ItemDelegate::constActionBorder),
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rect.y()+((rect.height()-ItemDelegate::constActionIconSize)/2),
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ItemDelegate::constActionIconSize, ItemDelegate::constActionIconSize);
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if (act1 && actionRect.contains(QCursor::pos())) {
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return act1;
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}
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actionRect.adjust(-(ItemDelegate::constActionIconSize+ItemDelegate::constActionBorder), 0, 0, 0);
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if (act2 && actionRect.contains(QCursor::pos())) {
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return act2;
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}
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return 0;
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}
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void ItemView::itemClicked(const QModelIndex &index)
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{
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QAction *act=getAction(index);
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if (act) {
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act->trigger();
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}
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}
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void ItemView::itemActivated(const QModelIndex &index)
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{
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QAction *act=getAction(index);
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if (act) {
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return;
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}
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if (usingTreeView) {
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treeView->setExpanded(index, !treeView->isExpanded(index));
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} else if (index.isValid() && index.child(0, 0).isValid()) {
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prevTopIndex=listView->indexAt(QPoint(0, 0));
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setLevel(currentLevel+1);
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#ifdef ENABLE_KDE_SUPPORT
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listSearch->setPlaceholderText(i18n("Search %1...", index.data(Qt::DisplayRole).toString()));
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#else
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listSearch->setPlaceholderText(tr("Search %1...").arg(index.data(Qt::DisplayRole).toString()));
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#endif
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listView->setRootIndex(index);
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listView->scrollToTop();
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}
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}
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