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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "Ruler.h"
#include "TimelineConstants.h"
#include <QtGui/qpainter.h>
#include <QtWidgets/qwidget.h>
#include <QtCore/qdebug.h>
Ruler::Ruler(TimelineItem *parent) : TimelineItem(parent)
{
setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::Fixed);
}
void Ruler::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
Q_UNUSED(option)
double xStep = TimelineConstants::RULER_SEC_W / TimelineConstants::RULER_SEC_DIV * m_timeScale;
double totalSegmentsWidth = TimelineConstants::RULER_EDGE_OFFSET
+ m_duration * xStep * TimelineConstants::RULER_SEC_DIV;
// Ruler painted width to be at least widget width
double minRulerWidth = widget->width();
double rowXMax = std::max(minRulerWidth, totalSegmentsWidth);
painter->save();
painter->setPen(QColor(TimelineConstants::RULER_COLOR_DISABLED));
painter->drawLine(TimelineConstants::RULER_EDGE_OFFSET,
TimelineConstants::RULER_BASE_Y,
rowXMax + TimelineConstants::RULER_EDGE_OFFSET,
TimelineConstants::RULER_BASE_Y);
painter->setPen(QColor(TimelineConstants::RULER_COLOR));
painter->drawLine(TimelineConstants::RULER_EDGE_OFFSET,
TimelineConstants::RULER_BASE_Y,
totalSegmentsWidth,
TimelineConstants::RULER_BASE_Y);
QFont font = painter->font();
font.setPointSize(8);
painter->setFont(font);
const int margin = 50;
const int secDiv = TimelineConstants::RULER_SEC_DIV;
double rowX = 0;
bool useDisabledColor = false;
for (int i = 0; rowX < rowXMax; i++) {
rowX = TimelineConstants::RULER_EDGE_OFFSET + xStep * i;
// Optimization to skip painting outside the visible area
if (rowX < (m_viewportX - margin) || rowX > (m_viewportX + minRulerWidth + margin))
continue;
const int h = i % secDiv == 0 ? TimelineConstants::RULER_DIV_H1 :
i % secDiv == secDiv * 0.5 ? TimelineConstants::RULER_DIV_H2 :
TimelineConstants::RULER_DIV_H3;
if (!useDisabledColor && rowX > totalSegmentsWidth) {
painter->setPen(QColor(TimelineConstants::RULER_COLOR_DISABLED));
useDisabledColor = true;
}
painter->drawLine(QPointF(rowX, TimelineConstants::RULER_BASE_Y - h),
QPointF(rowX, TimelineConstants::RULER_BASE_Y - 1));
// See if label should be shown at this tick at this zoom level
bool drawTimestamp = false;
if ((i % (secDiv * 4) == 0)
|| (i % (secDiv * 2) == 0 && m_timeScale >= TimelineConstants::RULER_TICK_SCALE1)
|| (i % secDiv == 0 && m_timeScale >= TimelineConstants::RULER_TICK_SCALE2)
|| (i % secDiv == secDiv * 0.5
&& m_timeScale >= TimelineConstants::RULER_TICK_SCALE3)
|| (m_timeScale >= TimelineConstants::RULER_TICK_SCALE4)) {
drawTimestamp = true;
}
if (drawTimestamp) {
QRectF timestampPos = QRectF(TimelineConstants::RULER_EDGE_OFFSET
+ xStep * i - TimelineConstants::RULER_LABEL_W / 2,
1, TimelineConstants::RULER_LABEL_W,
TimelineConstants::RULER_LABEL_H);
painter->drawText(timestampPos, Qt::AlignCenter,
timestampString(i * 1000 / TimelineConstants::RULER_SEC_DIV));
}
}
painter->restore();
}
void Ruler::setTimelineScale(double scl)
{
m_timeScale = scl;
update();
}
// convert distance values to time
double Ruler::distanceToTime(double distance) const
{
return distance / (TimelineConstants::RULER_SEC_W * m_timeScale);
}
// convert time values to distance
double Ruler::timeToDistance(double time) const
{
return time * TimelineConstants::RULER_SEC_W * m_timeScale;
}
// x position of ruler value 0
double Ruler::durationStartX() const
{
return x() + TimelineConstants::RULER_EDGE_OFFSET;
}
// x position of ruler max value (duration)
double Ruler::durationEndX() const
{
return durationStartX() + timeToDistance(m_duration);
}
double Ruler::timelineScale() const
{
return m_timeScale;
}
double Ruler::duration() const
{
return m_duration;
}
double Ruler::maxDuration() const
{
return m_maxDuration;
}
void Ruler::setDuration(double duration, double maxDuration)
{
if (m_duration != duration || m_maxDuration != maxDuration) {
m_duration = duration;
m_maxDuration = maxDuration;
update();
emit durationChanged(duration);
}
}
void Ruler::setViewportX(int viewportX)
{
if (m_viewportX != viewportX) {
m_viewportX = viewportX;
update();
}
}
// Returns timestamp in mm:ss.ttt or ss.ttt format
const QString Ruler::timestampString(int timeMs)
{
int ms = timeMs % 1000;
int s = timeMs % 60000 / 1000;
int m = timeMs % 3600000 / 60000;
QString msString = QString::number(ms).rightJustified(3, '0');
QString sString = QString::number(s).rightJustified(2, '0');
if (timeMs == 0)
return tr("0");
else if (m == 0)
return tr("%1.%2").arg(sString).arg(msString);
else
return tr("%1:%2.%3").arg(m).arg(sString).arg(msString);
}
int Ruler::type() const
{
// Enable the use of qgraphicsitem_cast with this item.
return TypeRuler;
}
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