/*
* QRoundProgressBar - a circular progress bar Qt widget.
*
* Sintegrial Technologies (c) 2015-now
*
* The software is freeware and is distributed "as is" with the complete source codes.
* Anybody is free to use it in any software projects, either commercial or non-commercial.
* Please do not remove this copyright message and remain the name of the author unchanged.
*
* It is very appreciated if you produce some feedback to us case you are going to use
* the software.
*
* Please send your questions, suggestions, and information about found issues to the
*
* sintegrial@gmail.com
*
*/
#include "QRoundProgressBar.h"
#include <QtGui/QPainter>
QRoundProgressBar::QRoundProgressBar(QWidget *parent) :
QWidget(parent),
m_min(0), m_max(100),
m_value(25),
m_nullPosition(PositionTop),
m_barStyle(StyleDonut),
m_outlinePenWidth(1),
m_dataPenWidth(1),
m_rebuildBrush(false),
m_format("%p%"),
m_decimals(1),
m_updateFlags(UF_PERCENT)
{
}
void QRoundProgressBar::setRange(double min, double max)
{
m_min = min;
m_max = max;
if (m_max < m_min)
qSwap(m_max, m_min);
if (m_value < m_min)
m_value = m_min;
else if (m_value > m_max)
m_value = m_max;
if (!m_gradientData.isEmpty())
m_rebuildBrush = true;
update();
}
void QRoundProgressBar::setMinimum(double min)
{
setRange(min, m_max);
}
void QRoundProgressBar::setMaximum(double max)
{
setRange(m_min, max);
}
void QRoundProgressBar::setValue(double val)
{
if (m_value != val)
{
if (val < m_min)
m_value = m_min;
else if (val > m_max)
m_value = m_max;
else
m_value = val;
update();
}
}
void QRoundProgressBar::setValue(int val)
{
setValue(double(val));
}
void QRoundProgressBar::setNullPosition(double position)
{
if (position != m_nullPosition)
{
m_nullPosition = position;
if (!m_gradientData.isEmpty())
m_rebuildBrush = true;
update();
}
}
void QRoundProgressBar::setBarStyle(QRoundProgressBar::BarStyle style)
{
if (style != m_barStyle)
{
m_barStyle = style;
update();
}
}
void QRoundProgressBar::setOutlinePenWidth(double penWidth)
{
if (penWidth != m_outlinePenWidth)
{
m_outlinePenWidth = penWidth;
update();
}
}
void QRoundProgressBar::setDataPenWidth(double penWidth)
{
if (penWidth != m_dataPenWidth)
{
m_dataPenWidth = penWidth;
update();
}
}
void QRoundProgressBar::setDataColors(const QGradientStops &stopPoints)
{
if (stopPoints != m_gradientData)
{
m_gradientData = stopPoints;
m_rebuildBrush = true;
update();
}
}
void QRoundProgressBar::setFormat(const QString &format)
{
if (format != m_format)
{
m_format = format;
valueFormatChanged();
}
}
void QRoundProgressBar::resetFormat()
{
m_format = QString::null;
valueFormatChanged();
}
void QRoundProgressBar::setDecimals(int count)
{
if (count >= 0 && count != m_decimals)
{
m_decimals = count;
valueFormatChanged();
}
}
void QRoundProgressBar::paintEvent(QPaintEvent* /*event*/)
{
double outerRadius = qMin(width(), height());
QRectF baseRect(1, 1, outerRadius-2, outerRadius-2);
QImage buffer(outerRadius, outerRadius, QImage::Format_ARGB32_Premultiplied);
QPainter p(&buffer);
p.setRenderHint(QPainter::Antialiasing);
// data brush
rebuildDataBrushIfNeeded();
// background
drawBackground(p, buffer.rect());
// base circle
drawBase(p, baseRect);
// data circle
double arcStep = 360.0 / (m_max - m_min) * m_value;
drawValue(p, baseRect, m_value, arcStep);
// center circle
double innerRadius(0);
QRectF innerRect;
calculateInnerRect(baseRect, outerRadius, innerRect, innerRadius);
drawInnerBackground(p, innerRect);
// text
drawText(p, innerRect, innerRadius, m_value);
// finally draw the bar
p.end();
QPainter painter(this);
painter.fillRect(baseRect, palette().background());
painter.drawImage(0,0, buffer);
}
void QRoundProgressBar::drawBackground(QPainter &p, const QRectF &baseRect)
{
//p.fillRect(baseRect, palette().background());
p.fillRect(baseRect, QBrush(QColor(54,54,54)));//科电航宇项目修改，整个widdget的背景色
}
void QRoundProgressBar::drawBase(QPainter &p, const QRectF &baseRect)
{
switch (m_barStyle)
{
case StyleDonut:
// p.setPen(QPen(palette().shadow().color(), m_outlinePenWidth));
//p.setBrush(palette().base());
p.setPen(QPen(QColor(20,57,106), m_outlinePenWidth));//科电航宇项目修改，外圆的边框颜色
p.setBrush(QBrush(QColor(20,57,106)));//外圆环的颜色
p.drawEllipse(baseRect);
break;
case StylePie:
p.setPen(QPen(palette().base().color(), m_outlinePenWidth));
p.setBrush(palette().base());
p.drawEllipse(baseRect);
break;
case StyleLine:
p.setPen(QPen(palette().base().color(), m_outlinePenWidth));
p.setBrush(Qt::NoBrush);
p.drawEllipse(baseRect.adjusted(m_outlinePenWidth/2, m_outlinePenWidth/2, -m_outlinePenWidth/2, -m_outlinePenWidth/2));
break;
default:;
}
}
void QRoundProgressBar::drawValue(QPainter &p, const QRectF &baseRect, double value, double arcLength)
{
// nothing to draw
if (value == m_min)
return;
// for Line style
if (m_barStyle == StyleLine)
{
p.setPen(QPen(palette().highlight().color(), m_dataPenWidth));
p.setBrush(Qt::NoBrush);
p.drawArc(baseRect.adjusted(m_outlinePenWidth/2, m_outlinePenWidth/2, -m_outlinePenWidth/2, -m_outlinePenWidth/2),
m_nullPosition * 16,
-arcLength * 16);
return;
}
// for Pie and Donut styles
QPainterPath dataPath;
dataPath.setFillRule(Qt::WindingFill);
// pie segment outer
dataPath.moveTo(baseRect.center());
dataPath.arcTo(baseRect, m_nullPosition, -arcLength);
dataPath.lineTo(baseRect.center());
p.setBrush(palette().highlight());
//p.setPen(QPen(palette().shadow().color(), m_dataPenWidth));
p.setPen(QPen(QColor(20,57,106), m_dataPenWidth));//科电航宇项目修改，内圆的边框颜色
p.drawPath(dataPath);
}
void QRoundProgressBar::calculateInnerRect(const QRectF &/*baseRect*/, double outerRadius, QRectF &innerRect, double &innerRadius)
{
// for Line style
if (m_barStyle == StyleLine)
{
innerRadius = outerRadius - m_outlinePenWidth;
}
else // for Pie and Donut styles
{
innerRadius = outerRadius * 0.75;
}
double delta = (outerRadius - innerRadius) / 2;
innerRect = QRectF(delta, delta, innerRadius, innerRadius);
}
void QRoundProgressBar::drawInnerBackground(QPainter &p, const QRectF &innerRect)
{
if (m_barStyle == StyleDonut)
{
p.setBrush(palette().alternateBase());
p.drawEllipse(innerRect);
}
}
void QRoundProgressBar::drawText(QPainter &p, const QRectF &innerRect, double innerRadius, double value)
{
if (m_format.isEmpty())
return;
// !!! to revise
QFont f(font());
f.setPixelSize(innerRadius * qMax(0.05, (0.35 - (double)m_decimals * 0.08)));
p.setFont(f);
QRectF textRect(innerRect);
p.setPen(palette().text().color());
p.drawText(textRect, Qt::AlignCenter, valueToText(value));
}
QString QRoundProgressBar::valueToText(double value) const
{
QString textToDraw(m_format);
if (m_updateFlags &
