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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Quick Extras module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** 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-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qquickflatprogressbar_p.h"
#include <QtCore/QtMath>
#include <QtGui/QPainter>
QQuickFlatProgressBar::QQuickFlatProgressBar(QQuickItem *parent) :
QQuickPaintedItem(parent),
mStripeOffset(0),
mRadius(0),
mIndeterminate(false)
{
mAnimation.setTargetObject(this);
mAnimation.setPropertyName("stripeOffset");
mAnimation.setEndValue(0);
mAnimation.setDuration(800);
mAnimation.setLoopCount(-1);
connect(this, SIGNAL(stripeOffsetChanged(qreal)), this, SLOT(repaint()));
connect(this, SIGNAL(progressChanged(qreal)), this, SLOT(repaint()));
connect(this, SIGNAL(enabledChanged()), this, SLOT(repaint()));
connect(this, SIGNAL(indeterminateChanged(bool)), this, SLOT(repaint()));
connect(this, SIGNAL(widthChanged()), this, SLOT(onWidthChanged()));
connect(this, SIGNAL(heightChanged()), this, SLOT(onHeightChanged()));
connect(this, SIGNAL(visibleChanged()), this, SLOT(onVisibleChanged()));
}
int QQuickFlatProgressBar::barWidth()
{
// 14 is the design height of stripes on the bar, 10 is design width of stripe
return int(height() * 10 / 14);
}
void QQuickFlatProgressBar::paint(QPainter *painter)
{
// This item should always be rounded to an integer size, so it is safe to use int here.
const int w = width();
const int h = height();
painter->setRenderHint(QPainter::Antialiasing, true);
painter->setPen(Qt::transparent);
// Draw the background.
painter->setBrush(isIndeterminate() && mProgress > 0 ? QColor(92, 170, 21) : QColor(0, 0, 0, 255 * 0.15));
painter->drawRoundedRect(0, 0, w, h, mRadius, mRadius);
// Draw progress, or indeterminate stripes.
painter->setClipPath(mClipPath);
if (!mIndeterminate) {
painter->setBrush(isEnabled() ? QColor(92, 170, 21) : QColor(179, 179, 179));
painter->drawRect(0, 0, int(w * mProgress), h);
} else {
QPainterPath innerClipPath;
// 1 is the design margin thickness.
const int margin = qMax(1, int(height() * (1.0 / 16.0)));
// We take the margin from the radius so that the inner and outer radii match each other visually.
innerClipPath.addRoundedRect(margin, margin, width() - margin * 2, height() - margin * 2, mRadius - margin, mRadius - margin);
painter->setClipPath(innerClipPath);
painter->translate(mStripeOffset, 0);
const qreal stripeWidth = barWidth();
// The horizontal distance created by the slant of the stripe.
const qreal stripeSlantDistance = h;
// One stripe width is equal to the height of the bar.
QPainterPath stripe;
stripe.moveTo(0, h);
stripe.lineTo(stripeSlantDistance, 0);
stripe.lineTo(stripeSlantDistance + stripeWidth, 0);
stripe.lineTo(stripeWidth, h);
stripe.closeSubpath();
painter->setBrush(QBrush(mProgress > 0 ? QColor(255, 255, 255, 77) : Qt::white));
for (int i = -stripeWidth * 2; i < w + stripeWidth * 2; i += stripeWidth * 2) {
painter->translate(i, 0);
painter->drawPath(stripe);
painter->translate(-i, 0);
}
painter->translate(-mStripeOffset, 0);
}
}
qreal QQuickFlatProgressBar::stripeOffset() const
{
return mStripeOffset;
}
void QQuickFlatProgressBar::setStripeOffset(qreal pos)
{
if (pos != mStripeOffset) {
mStripeOffset = pos;
emit stripeOffsetChanged(pos);
}
}
qreal QQuickFlatProgressBar::progress() const
{
return mProgress;
}
void QQuickFlatProgressBar::setProgress(qreal progress)
{
if (progress != mProgress) {
mProgress = progress;
emit progressChanged(mProgress);
}
}
bool QQuickFlatProgressBar::isIndeterminate()
{
return mIndeterminate;
}
void QQuickFlatProgressBar::setIndeterminate(bool indeterminate)
{
if (indeterminate != mIndeterminate) {
mIndeterminate = indeterminate;
emit indeterminateChanged(mIndeterminate);
}
}
void QQuickFlatProgressBar::repaint()
{
QQuickPaintedItem::update(QRect(0, 0, width(), height()));
}
void QQuickFlatProgressBar::restartAnimation()
{
mAnimation.stop();
mAnimation.setStartValue(-barWidth() * 2);
mAnimation.start();
}
void QQuickFlatProgressBar::onVisibleChanged()
{
if (isVisible()) {
restartAnimation();
} else {
mAnimation.stop();
}
}
void QQuickFlatProgressBar::onWidthChanged()
{
restartAnimation();
mClipPath = QPainterPath();
mClipPath.addRoundedRect(0, 0, width(), height(), mRadius, mRadius);
}
void QQuickFlatProgressBar::onHeightChanged()
{
restartAnimation();
// 3 is the design radius, 16 is the design height of the bar
const qreal radius = height() * 3 / 16;
if (radius != mRadius) {
mRadius = radius;
}
mClipPath = QPainterPath();
mClipPath.addRoundedRect(0, 0, width(), height(), mRadius, mRadius);
}
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