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/***********************************************************************
* Copyright 2003-2004 Max Howell <max.howell@methylblue.com>
* Copyright 2008-2009 Martin Sandsmark <martin.sandsmark@kde.org>
*
* 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 of
* the License or (at your option) version 3 or any later version
* accepted by the membership of KDE e.V. (or its successor approved
* by the membership of KDE e.V.), which shall act as a proxy
* defined in Section 14 of version 3 of the license.
*
* 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 General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
***********************************************************************/
#include "fileTree.h"
#include "Config.h"
#include "radialMap.h" //class Segment
#include "widget.h"
#include <QMenu> //::mousePressEvent()
#include <QUrl>
#include <QApplication> //QApplication::setOverrideCursor()
#include <QClipboard>
#include <QPainter>
#include <QTimer> //::resizeEvent()
#include <QDropEvent>
#include <QPaintEvent>
#include <QResizeEvent>
#include <QMouseEvent>
#include <QDragEnterEvent>
#include <QToolTip>
#include <QMimeData>
#include <cmath> //::segmentAt()
void RadialMap::Widget::resizeEvent(QResizeEvent*)
{
if (m_map.resize(rect()))
m_timer.setSingleShot(true);
m_timer.start(500); //will cause signature to rebuild for new size
//always do these as they need to be initialised on creation
m_offset.rx() = (width() - m_map.width()) / 2;
m_offset.ry() = (height() - m_map.height()) / 2;
}
void RadialMap::Widget::paintEvent(QPaintEvent*)
{
QPainter paint;
paint.begin(this);
if (!m_map.isNull())
paint.drawPixmap(m_offset, m_map.pixmap());
else
{
paint.drawText(rect(), 0, tr("We messed up, the user needs to initiate a rescan."));
return;
}
//exploded labels
if (!m_map.isNull() && !m_timer.isActive())
{
if (Config::antialias) {
paint.setRenderHint(QPainter::Antialiasing);
//make lines appear on pixel boundaries
paint.translate(0.5, 0.5);
}
paintExplodedLabels(paint);
}
}
const RadialMap::Segment* RadialMap::Widget::segmentAt(QPoint &e) const
{
//determine which segment QPoint e is above
e -= m_offset;
if (!m_map.m_signature)
return nullptr;
if (e.x() <= m_map.width() && e.y() <= m_map.height())
{
//transform to cartesian coords
e.rx() -= m_map.width() / 2; //should be an int
e.ry() = m_map.height() / 2 - e.y();
double length = hypot(e.x(), e.y());
if (length >= m_map.m_innerRadius) //not hovering over inner circle
{
uint depth = ((int)length - m_map.m_innerRadius) / m_map.m_ringBreadth;
if (depth <= m_map.m_visibleDepth) //**** do earlier since you can //** check not outside of range
{
//vector calculation, reduces to simple trigonometry
//cos angle = (aibi + ajbj) / albl
//ai = x, bi=1, aj=y, bj=0
//cos angle = x / (length)
uint a = (uint)(acos((double)e.x() / length) * 916.736); //916.7324722 = #radians in circle * 16
//acos only understands 0-180 degrees
if (e.y() < 0) a = 5760 - a;
for (Segment *segment : m_map.m_signature[depth]) {
if (segment->intersects(a))
return segment;
}
}
}
else return m_rootSegment; //hovering over inner circle
}
return nullptr;
}
void RadialMap::Widget::mouseMoveEvent(QMouseEvent *e)
{
//set m_focus to what we hover over, update UI if it's a new segment
Segment const * const oldFocus = m_focus;
QPoint p = e->pos();
m_focus = segmentAt(p); //NOTE p is passed by non-const reference
if (m_focus)
{
m_tooltip.move(e->globalX() + 20, e->globalY() + 20);
if (m_focus != oldFocus) //if not same as last time
{
setCursor(Qt::PointingHandCursor);
QString string;
string = QObject::tr("Tooltip of file/folder, %1 is path, %2 is size")
.arg(m_focus->file()->displayPath())
.arg(m_focus->file()->humanReadableSize());
if (m_focus->file()->isFolder()) {
int files = static_cast<const Folder*>(m_focus->file())->children();
const uint percent = uint((100 * files) / (double)m_tree->children());
string += QLatin1Char('\n');
if (percent > 0) {
string += QObject::tr("Tooltip of folder, %1 File (%2%)")
.arg(files).arg(percent);
} else {
string += QObject::tr("Tooltip of folder, %1 File")
.arg(files);
}
}
// Calculate a semi-sane size for the tooltip
QFontMetrics fontMetrics(font());
int tooltipWidth = 0;
int tooltipHeight = 0;
for (const QString &part : string.split(QLatin1Char('\n'))) {
tooltipHeight += fontMetrics.height();
tooltipWidth = qMax(tooltipWidth, fontMetrics.width(part));
}
// Limit it to the window size, probably should find something better
tooltipWidth = qMin(tooltipWidth, window()->width());
tooltipWidth += 10;
tooltipHeight += 10;
m_tooltip.resize(tooltipWidth, tooltipHeight);
m_tooltip.setText(string);
m_tooltip.show();
emit mouseHover(m_focus->file()->displayPath());
update();
}
}
else if (oldFocus && oldFocus->file() != m_tree)
{
m_tooltip.hide();
unsetCursor();
update();
emit mouseHover(QString());
}
}
void RadialMap::Widget::enterEvent(QEvent *)
{
if (!m_focus) return;
setCursor(Qt::PointingHandCursor);
emit mouseHover(m_focus->file()->displayPath());
update();
}
void RadialMap::Widget::leaveEvent(QEvent *)
{
m_tooltip.hide();
}
void RadialMap::Widget::changeEvent(QEvent *e)
{
if (e->type() == QEvent::ApplicationPaletteChange ||
e->type() == QEvent::PaletteChange)
m_map.paint();
}
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