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Add a new class, QtWaitingSpinner, MIT Licensed.

Browse source 
from https://github.com/snowwlex/QtWaitingSpinner

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Tomaz Canabrava 2015-05-17 18:33:43 -03:00 committed by Dirk Hohndel
parent c11bbe4f38
commit b59084dc1f
3 changed files with 392 additions and 0 deletions
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1
CMakeLists.txt
View file

@ -273,6 +273,7 @@ set(SUBSURFACE_INTERFACE
qt-ui/filtermodels.cpp
qt-ui/undocommands.cpp
qt-ui/locationinformation.cpp
qt-ui/qtwaitingspinner.cpp
${SOCIALNETWORKS}
)

288
qt-ui/qtwaitingspinner.cpp Normal file
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@ -0,0 +1,288 @@
/* Original Work Copyright (c) 2012-2014 Alexander Turkin
Modified 2014 by William Hallatt
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <cmath>
#include <algorithm>
#include <QPainter>
#include <QTimer>
#include "qtwaitingspinner.h"
/*----------------------------------------------------------------------------*/
// Defaults
const QColor c_color(Qt::black);
const qreal c_roundness(70.0);
const qreal c_minTrailOpacity(15.0);
const qreal c_trailFadePercentage(70.0);
const int c_lines(12);
const int c_lineLength(10);
const int c_lineWidth(5);
const int c_innerRadius(10);
const int c_revPerSec(1);
/*----------------------------------------------------------------------------*/
QtWaitingSpinner::QtWaitingSpinner(QWidget *parent)
: QWidget(parent),
// Configurable settings.
m_color(c_color), m_roundness(c_roundness),
m_minTrailOpacity(c_minTrailOpacity),
m_trailFadePercentage(c_trailFadePercentage), m_revPerSec(c_revPerSec),
m_numberOfLines(c_lines), m_lineLength(c_lineLength + c_lineWidth),
m_lineWidth(c_lineWidth), m_innerRadius(c_innerRadius),
// Other
m_timer(NULL), m_parent(parent), m_centreOnParent(false),
m_currentCounter(0), m_isSpinning(false) {
initialise();
}
/*----------------------------------------------------------------------------*/
QtWaitingSpinner::QtWaitingSpinner(Qt::WindowModality modality, QWidget *parent,
bool centreOnParent)
: QWidget(parent, Qt::Dialog | Qt::FramelessWindowHint),
// Configurable settings.
m_color(c_color), m_roundness(c_roundness),
m_minTrailOpacity(c_minTrailOpacity),
m_trailFadePercentage(c_trailFadePercentage), m_revPerSec(c_revPerSec),
m_numberOfLines(c_lines), m_lineLength(c_lineLength + c_lineWidth),
m_lineWidth(c_lineWidth), m_innerRadius(c_innerRadius),
// Other
m_timer(NULL), m_parent(parent), m_centreOnParent(centreOnParent),
m_currentCounter(0) {
initialise();
// We need to set the window modality AFTER we've hidden the
// widget for the first time since changing this property while
// the widget is visible has no effect.
this->setWindowModality(modality);
this->setAttribute(Qt::WA_TranslucentBackground);
}
/*----------------------------------------------------------------------------*/
void QtWaitingSpinner::initialise() {
m_timer = new QTimer(this);
connect(m_timer, SIGNAL(timeout()), this, SLOT(rotate()));
updateSize();
updateTimer();
this->hide();
}
/*----------------------------------------------------------------------------*/
void QtWaitingSpinner::paintEvent(QPaintEvent * /*ev*/) {
QPainter painter(this);
painter.fillRect(this->rect(), Qt::transparent);
painter.setRenderHint(QPainter::Antialiasing, true);
if (m_currentCounter >= m_numberOfLines) {
m_currentCounter = 0;
}
painter.setPen(Qt::NoPen);
for (int i = 0; i < m_numberOfLines; ++i) {
painter.save();
painter.translate(m_innerRadius + m_lineLength,
m_innerRadius + m_lineLength);
qreal rotateAngle =
static_cast<qreal>(360 * i) / static_cast<qreal>(m_numberOfLines);
painter.rotate(rotateAngle);
painter.translate(m_innerRadius, 0);
int distance =
lineCountDistanceFromPrimary(i, m_currentCounter, m_numberOfLines);
QColor color =
currentLineColor(distance, m_numberOfLines, m_trailFadePercentage,
m_minTrailOpacity, m_color);
painter.setBrush(color);
// TODO improve the way rounded rect is painted
painter.drawRoundedRect(
QRect(0, -m_lineWidth / 2, m_lineLength, m_lineWidth), m_roundness,
m_roundness, Qt::RelativeSize);
painter.restore();
}
}
/*----------------------------------------------------------------------------*/
void QtWaitingSpinner::start() {
updatePosition();
m_isSpinning = true;
this->show();
if (!m_timer->isActive()) {
m_timer->start();
m_currentCounter = 0;
}
}
/*----------------------------------------------------------------------------*/
void QtWaitingSpinner::stop() {
m_isSpinning = false;
this->hide();
if (m_timer->isActive()) {
m_timer->stop();
m_currentCounter = 0;
}
}
/*----------------------------------------------------------------------------*/
void QtWaitingSpinner::setNumberOfLines(int lines) {
m_numberOfLines = lines;
m_currentCounter = 0;
updateTimer();
}
/*----------------------------------------------------------------------------*/
void QtWaitingSpinner::setLineLength(int length) {
m_lineLength = length;
updateSize();
}
/*----------------------------------------------------------------------------*/
void QtWaitingSpinner::setLineWidth(int width) {
m_lineWidth = width;
updateSize();
}
/*----------------------------------------------------------------------------*/
void QtWaitingSpinner::setInnerRadius(int radius) {
m_innerRadius = radius;
updateSize();
}
/*----------------------------------------------------------------------------*/
bool QtWaitingSpinner::isSpinning() const { return m_isSpinning; }
/*----------------------------------------------------------------------------*/
void QtWaitingSpinner::setRoundness(qreal roundness) {
m_roundness = std::max(0.0, std::min(100.0, roundness));
}
/*----------------------------------------------------------------------------*/
void QtWaitingSpinner::setColor(QColor color) { m_color = color; }
/*----------------------------------------------------------------------------*/
void QtWaitingSpinner::setRevolutionsPerSecond(int rps) {
m_revPerSec = rps;
updateTimer();
}
/*----------------------------------------------------------------------------*/
void QtWaitingSpinner::setTrailFadePercentage(qreal trail) {
m_trailFadePercentage = trail;
}
/*----------------------------------------------------------------------------*/
void QtWaitingSpinner::setMinimumTrailOpacity(qreal minOpacity) {
m_minTrailOpacity = minOpacity;
}
/*----------------------------------------------------------------------------*/
void QtWaitingSpinner::rotate() {
++m_currentCounter;
if (m_currentCounter >= m_numberOfLines) {
m_currentCounter = 0;
}
update();
}
/*----------------------------------------------------------------------------*/
void QtWaitingSpinner::updateSize() {
int size = (m_innerRadius + m_lineLength) * 2;
setFixedSize(size, size);
}
/*----------------------------------------------------------------------------*/
void QtWaitingSpinner::updateTimer() {
m_timer->setInterval(calculateTimerInterval(m_numberOfLines, m_revPerSec));
}
/*----------------------------------------------------------------------------*/
void QtWaitingSpinner::updatePosition() {
if (m_parent && m_centreOnParent) {
this->move(m_parent->frameGeometry().topLeft() + m_parent->rect().center() -
this->rect().center());
}
}
/*----------------------------------------------------------------------------*/
int QtWaitingSpinner::calculateTimerInterval(int lines, int speed) {
return 1000 / (lines * speed);
}
/*----------------------------------------------------------------------------*/
int QtWaitingSpinner::lineCountDistanceFromPrimary(int current, int primary,
int totalNrOfLines) {
int distance = primary - current;
if (distance < 0) {
distance += totalNrOfLines;
}
return distance;
}
/*----------------------------------------------------------------------------*/
QColor QtWaitingSpinner::currentLineColor(int countDistance, int totalNrOfLines,
qreal trailFadePerc, qreal minOpacity,
QColor color) {
if (countDistance == 0) {
return color;
}
const qreal minAlphaF = minOpacity / 100.0;
int distanceThreshold =
static_cast<int>(ceil((totalNrOfLines - 1) * trailFadePerc / 100.0));
if (countDistance > distanceThreshold) {
color.setAlphaF(minAlphaF);
} else {
qreal alphaDiff = color.alphaF() - minAlphaF;
qreal gradient = alphaDiff / static_cast<qreal>(distanceThreshold + 1);
qreal resultAlpha = color.alphaF() - gradient * countDistance;
// If alpha is out of bounds, clip it.
resultAlpha = std::min(1.0, std::max(0.0, resultAlpha));
color.setAlphaF(resultAlpha);
}
return color;
}
/*----------------------------------------------------------------------------*/

103
qt-ui/qtwaitingspinner.h Normal file
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@ -0,0 +1,103 @@
/* Original Work Copyright (c) 2012-2014 Alexander Turkin
Modified 2014 by William Hallatt
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef QTWAITINGSPINNER_H
#define QTWAITINGSPINNER_H
#include <QWidget>
#include <QTimer>
#include <QColor>
class QtWaitingSpinner : public QWidget {
Q_OBJECT
public:
/*! Constructor for "standard" widget behaviour - use this
* constructor if you wish to, e.g. embed your widget in another. */
QtWaitingSpinner(QWidget *parent = 0);
/*! Constructor - use this constructor to automatically create a modal
* ("blocking") spinner on top of the calling widget/window. If a valid
* parent widget is provided, "centreOnParent" will ensure that
* QtWaitingSpinner automatically centres itself on it, if not,
* "centreOnParent" is ignored. */
QtWaitingSpinner(Qt::WindowModality modality, QWidget *parent = 0,
bool centreOnParent = true);
public Q_SLOTS:
void start();
void stop();
public:
void setColor(QColor color);
void setRoundness(qreal roundness);
void setMinimumTrailOpacity(qreal minOpacity);
void setTrailFadePercentage(qreal trail);
void setRevolutionsPerSecond(int rps);
void setNumberOfLines(int lines);
void setLineLength(int length);
void setLineWidth(int width);
void setInnerRadius(int radius);
bool isSpinning() const;
private Q_SLOTS:
void rotate();
protected:
void paintEvent(QPaintEvent *ev);
private:
static int calculateTimerInterval(int lines, int speed);
static int lineCountDistanceFromPrimary(int current, int primary,
int totalNrOfLines);
static QColor currentLineColor(int distance, int totalNrOfLines,
qreal trailFadePerc, qreal minOpacity,
QColor color);
void initialise();
void updateSize();
void updateTimer();
void updatePosition();
private:
// Configurable settings.
QColor m_color;
qreal m_roundness; // 0..100
qreal m_minTrailOpacity;
qreal m_trailFadePercentage;
int m_revPerSec; // revolutions per second
int m_numberOfLines;
int m_lineLength;
int m_lineWidth;
int m_innerRadius;
private:
QtWaitingSpinner(const QtWaitingSpinner&);
QtWaitingSpinner& operator=(const QtWaitingSpinner&);
QTimer *m_timer;
QWidget *m_parent;
bool m_centreOnParent;
int m_currentCounter;
bool m_isSpinning;
};
#endif // QTWAITINGSPINNER_H