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/* ============================================================
*
* This file is a part of digiKam project
* http://www.digikam.org
*
* Date : 2006-01-20
* Description : action categorized view
*
* Copyright (C) 2006-2012 by Gilles Caulier <caulier dot gilles at gmail dot com>
*
* This program is free software; you can redistribute it
* and/or modify it under the terms of the GNU General
* Public License as published by the Free Software Foundation;
* either version 2, or (at your option)
* any later version.
*
* 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.
*
* ============================================================ */
#include "actioncategorizedview.h"
// Qt includes
#include <QString>
#include <QPropertyAnimation>
#include <QScrollBar>
#include <QSignalMapper>
// KDE includes
#include <kdebug.h>
#include <kdeversion.h>
#include <kcategorydrawer.h>
namespace Digikam
{
ActionCategorizedView::ActionCategorizedView(QWidget* const parent)
: KCategorizedView(parent)
{
m_horizontalScrollAnimation = new QPropertyAnimation(horizontalScrollBar(), "value", this);
m_verticalScrollAnimation = new QPropertyAnimation(verticalScrollBar(), "value", this);
}
ActionCategorizedView::~ActionCategorizedView()
{
}
void ActionCategorizedView::setupIconMode()
{
setViewMode(QListView::IconMode);
setMovement(QListView::Static);
#if KDE_IS_VERSION(4,5,0)
setCategoryDrawer(new KCategoryDrawerV3(this)); // deprecated, but needed for KDE 4.4 compatibility
#else
setCategoryDrawer(new KCategoryDrawerV2); // deprecated, but needed for KDE 4.4 compatibility
#endif
setSelectionMode(QAbstractItemView::SingleSelection);
setMouseTracking(true);
viewport()->setAttribute(Qt::WA_Hover);
setFrameShape(QFrame::NoFrame);
}
void ActionCategorizedView::adjustGridSize()
{
// Find a suitable grid size. The delegate's size hint does never word-wrap.
// To keep a suitable width, we want to word wrap.
setWordWrap(true);
int maxSize = viewOptions().decorationSize.width() * 4;
QFontMetrics fm(viewOptions().font);
QSize grid;
for (int i = 0; i < model()->rowCount(); ++i)
{
const QModelIndex index = model()->index(i, 0);
const QSize size = sizeHintForIndex(index);
if (size.width() > maxSize)
{
QString text = index.data(Qt::DisplayRole).toString();
QRect unwrappedRect = fm.boundingRect(QRect(0, 0, size.width(), size.height()), Qt::AlignLeft, text);
QRect wrappedRect = fm.boundingRect(QRect(0, 0, maxSize, maxSize), Qt::AlignLeft | Qt::TextWordWrap, text);
grid = grid.expandedTo(QSize(maxSize, size.height() + wrappedRect.height() - unwrappedRect.height()));
}
else
{
grid = grid.expandedTo(size);
}
}
//grid += QSize(KDialog::spacingHint(), KDialog::spacingHint());
setGridSize(grid);
}
int ActionCategorizedView::autoScrollDuration(float relativeDifference, QPropertyAnimation* animation)
{
const int minimumTime = 1000;
const int maxPixelPerSecond = 1000;
int pixelToScroll = qAbs(animation->startValue().toInt() - animation->endValue().toInt());
int factor = qMax(1.0f, relativeDifference * 100); // in [1;15]
int duration = 1000 * pixelToScroll / maxPixelPerSecond;
duration *= factor;
return qMax(minimumTime, duration);
}
void ActionCategorizedView::autoScroll(float relativePos, QScrollBar* scrollBar, QPropertyAnimation* animation)
{
if (scrollBar->minimum() != scrollBar->maximum())
{
const float lowerPart = 0.15F;
const float upperPart = 0.85F;
if (relativePos > upperPart && scrollBar->value() != scrollBar->maximum())
{
animation->stop();
animation->setStartValue(scrollBar->value());
animation->setEndValue(scrollBar->maximum());
animation->setDuration(autoScrollDuration(1 - relativePos, animation));
animation->start();
}
else if (relativePos < lowerPart && scrollBar->value() != scrollBar->minimum())
{
animation->stop();
animation->setStartValue(scrollBar->value());
animation->setEndValue(scrollBar->minimum());
animation->setDuration(autoScrollDuration(relativePos, animation));
animation->start();
}
else
{
animation->stop();
}
}
}
void ActionCategorizedView::mouseMoveEvent(QMouseEvent* e)
{
KCategorizedView::mouseMoveEvent(e);
autoScroll(float(e->pos().x()) / viewport()->width(), horizontalScrollBar(), m_horizontalScrollAnimation);
autoScroll(float(e->pos().y()) / viewport()->height(), verticalScrollBar(), m_verticalScrollAnimation);
}
void ActionCategorizedView::leaveEvent(QEvent* e)
{
KCategorizedView::leaveEvent(e);
m_horizontalScrollAnimation->stop();
m_verticalScrollAnimation->stop();
}
} // namespace Digikam
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