plasma-framework/appletbrowser/kcategorizeditemsviewdelegate.cpp

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/*
* Copyright (C) 2007 Ivan Cukic <ivan.cukic+kde@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library/Lesser General Public License
* version 2, or (at your option) any later version, as published by the
* Free Software Foundation
*
* 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 Library/Lesser General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "kcategorizeditemsviewdelegate_p.h"
#include <cmath>
#include <QtCore>
#include <KIconLoader>
#include "kcategorizeditemsview_p.h"
#define FAV_ICON_SIZE 24
#define EMBLEM_ICON_SIZE 16
#define UNIVERSAL_PADDING 6
#define FADE_LENGTH 32
#define MAIN_ICON_SIZE 48
#define DROPDOWN_PADDING 2
#define DROPDOWN_SEPARATOR_HEIGHT 32
KCategorizedItemsViewDelegate::KCategorizedItemsViewDelegate(QObject * parent)
: QItemDelegate(parent), m_favoriteIcon("bookmark"),
m_favoriteAddIcon("edit-add"), m_favoriteRemoveIcon("edit-delete"),
m_onFavoriteIconItem(NULL)
{
m_parent = (KCategorizedItemsView *) parent;
}
void KCategorizedItemsViewDelegate::paint(QPainter *painter,
const QStyleOptionViewItem &option, const QModelIndex &index) const
{
// Preparing needed data for painting
int left = option.rect.left();
int top = option.rect.top();
int width = option.rect.width();
int height = option.rect.height();
bool leftToRight = (painter->layoutDirection() == Qt::LeftToRight);
QIcon::Mode iconMode = QIcon::Normal;
QColor backgroundColor = (option.state.testFlag(QStyle::State_Selected))?
option.palette.color(QPalette::Highlight):option.palette.color(QPalette::Base);
QColor foregroundColor = (option.state.testFlag(QStyle::State_Selected))?
option.palette.color(QPalette::HighlightedText):option.palette.color(QPalette::Text);
KCategorizedItemsViewModels::AbstractItem * item =
getItemByProxyIndex(index);
if (!item) return;
// Base Background
painter->fillRect(option.rect, QBrush(backgroundColor));
if (index.column() == 0) {
// Painting main column
QStyleOptionViewItem local_option_title(option);
QStyleOptionViewItem local_option_normal(option);
local_option_title.font.setBold(true);
local_option_title.font.setPointSize(local_option_title.font.pointSize() + 2);
QLinearGradient gradient;
QString title = item->name();
QString description = item->description();
// Painting
// Text
int textInner = 2 * UNIVERSAL_PADDING + MAIN_ICON_SIZE;
painter->setPen(foregroundColor);
painter->setFont(local_option_title.font);
painter->drawText(
left + (leftToRight ? textInner : 0),
top + UNIVERSAL_PADDING,
width - textInner, MAIN_ICON_SIZE / 2,
Qt::AlignBottom | Qt::AlignLeft, title);
painter->setFont(local_option_normal.font);
painter->drawText(
left + (leftToRight ? textInner : 0),
top + UNIVERSAL_PADDING + MAIN_ICON_SIZE / 2,
width - textInner, MAIN_ICON_SIZE / 2,
Qt::AlignTop | Qt::AlignLeft, description);
// Main icon
item->icon().paint(painter,
leftToRight ? left + UNIVERSAL_PADDING : left + width - UNIVERSAL_PADDING - MAIN_ICON_SIZE,
top + UNIVERSAL_PADDING,
MAIN_ICON_SIZE, MAIN_ICON_SIZE, Qt::AlignCenter, iconMode);
// Counting the number of emblems for this item
int emblemCount = 0;
QPair < Filter, QIcon * > emblem;
foreach (emblem, m_parent->m_emblems) {
if (item->passesFiltering(emblem.first)) ++emblemCount;
}
// Gradient part of the background - fading of the text at the end
if (leftToRight) {
gradient = QLinearGradient(left + width - UNIVERSAL_PADDING - FADE_LENGTH, 0,
left + width - UNIVERSAL_PADDING, 0);
gradient.setColorAt(1, backgroundColor);
backgroundColor.setAlpha(0);
gradient.setColorAt(0, backgroundColor);
} else {
gradient = QLinearGradient(left + UNIVERSAL_PADDING, 0,
left + UNIVERSAL_PADDING + FADE_LENGTH, 0);
gradient.setColorAt(0, backgroundColor);
backgroundColor.setAlpha(0);
gradient.setColorAt(1, backgroundColor);
}
QRect paintRect = option.rect;
painter->setCompositionMode(QPainter::CompositionMode_SourceOver);
painter->fillRect(paintRect, gradient);
if (leftToRight) {
gradient.setStart(left + width
- emblemCount * (UNIVERSAL_PADDING + EMBLEM_ICON_SIZE) - FADE_LENGTH, 0);
gradient.setFinalStop(left + width
- emblemCount * (UNIVERSAL_PADDING + EMBLEM_ICON_SIZE), 0);
} else {
gradient.setStart(left + UNIVERSAL_PADDING
+ emblemCount * (UNIVERSAL_PADDING + EMBLEM_ICON_SIZE), 0);
gradient.setFinalStop(left + UNIVERSAL_PADDING
+ emblemCount * (UNIVERSAL_PADDING + EMBLEM_ICON_SIZE) + FADE_LENGTH, 0);
}
paintRect.setHeight(UNIVERSAL_PADDING + MAIN_ICON_SIZE / 2);
painter->fillRect(paintRect, gradient);
// Emblems icons
int emblemLeft = leftToRight ? (left + width - EMBLEM_ICON_SIZE) : left; // - FAV_ICON_SIZE - 2 * UNIVERSAL_PADDING
foreach (emblem, m_parent->m_emblems) {
if (item->passesFiltering(emblem.first)) {
emblem.second->paint(painter,
emblemLeft, top + UNIVERSAL_PADDING,
EMBLEM_ICON_SIZE, EMBLEM_ICON_SIZE, Qt::AlignCenter, iconMode);
if (leftToRight) {
emblemLeft -= UNIVERSAL_PADDING + EMBLEM_ICON_SIZE;
} else {
emblemLeft += UNIVERSAL_PADDING + EMBLEM_ICON_SIZE;
}
}
}
} else {
// Painting favorite icon column
KCategorizedItemsViewModels::AbstractItem * item =
getItemByProxyIndex(index);
if (! (option.state & QStyle::State_MouseOver) && m_onFavoriteIconItem == item)
m_onFavoriteIconItem = NULL;
QIcon::Mode iconMode = QIcon::Normal;
if (!item->isFavorite()) {
iconMode = QIcon::Disabled;
} else if (option.state & QStyle::State_MouseOver) {
iconMode = QIcon::Active;
}
m_favoriteIcon.paint(painter,
left + width - FAV_ICON_SIZE - UNIVERSAL_PADDING, top + UNIVERSAL_PADDING,
FAV_ICON_SIZE, FAV_ICON_SIZE, Qt::AlignCenter, iconMode);
const KIcon * icon = (item->isFavorite())? & m_favoriteRemoveIcon : & m_favoriteAddIcon;
if ((option.state & QStyle::State_MouseOver) && (m_onFavoriteIconItem != item))
icon->paint(painter,
left + width - EMBLEM_ICON_SIZE - UNIVERSAL_PADDING, top + UNIVERSAL_PADDING,
EMBLEM_ICON_SIZE, EMBLEM_ICON_SIZE, Qt::AlignCenter, iconMode);
}
// Dividing line
backgroundColor = option.palette.color(QPalette::Highlight);
backgroundColor.setAlpha(100);
painter->setPen(backgroundColor);
painter->drawLine(left, top + height - 1, left + width, top + height - 1);
}
bool KCategorizedItemsViewDelegate::editorEvent(QEvent *event,
QAbstractItemModel *model,
const QStyleOptionViewItem &option,
const QModelIndex &index)
{
if (index.column() == 1 && event->type() == QEvent::MouseButtonPress) {
(m_onFavoriteIconItem = getItemByProxyIndex(index))
->setFavorite(!getItemByProxyIndex(index)->isFavorite());
return true;
}
return QItemDelegate::editorEvent(event, model, option, index);
}
QSize KCategorizedItemsViewDelegate::sizeHint(const QStyleOptionViewItem &option,
const QModelIndex &index ) const
{
Q_UNUSED(option);
//Q_UNUSED(index);
//option.
int width = (index.column() == 0) ? 0 : FAV_ICON_SIZE;
return QSize(width, MAIN_ICON_SIZE + 2 * UNIVERSAL_PADDING);
}
int KCategorizedItemsViewDelegate::columnWidth (int column, int viewWidth) const {
if (column == 1) {
return FAV_ICON_SIZE + 2 * UNIVERSAL_PADDING;
} else return viewWidth - columnWidth(1, viewWidth);
}
KCategorizedItemsViewModels::AbstractItem * KCategorizedItemsViewDelegate::getItemByProxyIndex(const QModelIndex & index) const {
return (AbstractItem *) m_parent->m_modelItems->itemFromIndex(
m_parent->m_modelFilterItems->mapToSource(index)
);
}
// KCategorizedItemsViewFilterDelegate
KCategorizedItemsViewFilterDelegate::KCategorizedItemsViewFilterDelegate(QObject *parent)
: QItemDelegate(parent) {
kDebug() << "KCategorizedItemsViewFilterDelegate(QObject *parent)\n";
}
void KCategorizedItemsViewFilterDelegate::paint(QPainter *painter,
const QStyleOptionViewItem &option, const QModelIndex &index) const
{
if (index.flags() & Qt::ItemIsEnabled) {
QItemDelegate::paint(painter, option, index);
} else {
QStyleOptionViewItem separatorOption(option);
int height = QItemDelegate::sizeHint(option, index).height() + 2 * DROPDOWN_PADDING;
separatorOption.state &= ~(QStyle::State_Selected
| QStyle::State_MouseOver | QStyle::State_HasFocus);
separatorOption.rect.setTop(separatorOption.rect.top() + separatorOption.rect.height() - height);
separatorOption.rect.setHeight(height);
QItemDelegate::paint(painter, separatorOption, index);
/*painter->drawLine(
option.rect.left(),
option.rect.top() + 1,
option.rect.left() + option.rect.width(),
option.rect.top() + 1);*/
}
}
QSize KCategorizedItemsViewFilterDelegate::sizeHint(const QStyleOptionViewItem &option,
const QModelIndex &index ) const
{
QSize size = QItemDelegate::sizeHint(option, index);
if (index.flags() & Qt::ItemIsEnabled) {
size.setHeight(size.height() + 2 * DROPDOWN_PADDING);
} else {
size.setHeight(DROPDOWN_SEPARATOR_HEIGHT);
}
return size;
}
#include "kcategorizeditemsviewdelegate_p.moc"