0cbd3823e
 김태훈
슬라이더 새로 구현
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#include "slider.h"
#include <QMouseEvent>
#include <QPainter>
#include <QDebug>
Slider::Slider(QWidget *parent) : QWidget(parent),
isSliderDown_(false), sliderPosition_(0), value_(0), minimum_(0), maximum_(1)
{
groove.load(":/images/slider/groove.png");
sub.load(":/images/slider/humidity.png");
handle.load(":/images/slider/handle_big.png");
updatePixmapPosition();
}
void Slider::setSubPixmap(const QPixmap &pixmap)
{
sub = pixmap;
}
void Slider::setSubPixmap(const QString &fileName)
{
setSubPixmap(QPixmap(fileName));
}
void Slider::setRange(int min, int max)
{
minimum_ = min;
maximum_ = max;
if (value_ < min)
setValue(min);
else if (value_ > max)
setValue(max);
}
void Slider::setMinimum(int min)
{
minimum_ = min;
if (value_ < min)
setValue(min);
}
void Slider::setMaximum(int max)
{
maximum_ = max;
if (value_ > max)
setValue(max);
}
bool Slider::isSliderDown()
{
return isSliderDown_;
}
int Slider::sliderPosition()
{
return sliderPosition_;
}
void Slider::setSliderPosition(int value)
{
if (sliderPosition_ == value)
return;
sliderPosition_ = value;
emit sliderMoved(value);
update();
}
void Slider::mouseMoveEvent(QMouseEvent *event)
{
if (!isSliderDown_)
return;
setSliderPosition(calcSliderPosition(event->x()));
}
void Slider::mousePressEvent(QMouseEvent */*event*/)
{
isSliderDown_ = true;
}
void Slider::mouseReleaseEvent(QMouseEvent */*event*/)
{
isSliderDown_ = false;
if (sliderPosition_ == value_)
return;
setValue(sliderPosition_);
}
void Slider::paintEvent(QPaintEvent */*event*/)
{
QPainter painter(this);
painter.drawPixmap(groovePoint, groove);
int subLength = calcSubLength(sliderPosition_);
if (subLength > 0)
painter.drawPixmap(subPoint, sub, QRect(0, 0, subLength, sub.height()));
QPen tickPen(QColor(71, 71, 71));
tickPen.setWidth(2);
painter.setPen(tickPen);
foreach (int tick, ticks)
{
int x = subPoint.x() + calcSubLength(tick);
painter.drawLine(x, groovePoint.y() + 22, x, groovePoint.y() + 28);
}
foreach (int tick, bigTicks)
{
int x = subPoint.x() + calcSubLength(tick);
painter.drawLine(x, groovePoint.y() + 22, x, groovePoint.y() + 33);
}
QPoint handlePoint(subPoint.x() + subLength - handle.width() / 2, (height() - handle.height()) / 2);
painter.drawPixmap(handlePoint, handle);
}
void Slider::resizeEvent(QResizeEvent */*event*/)
{
updatePixmapPosition();
}
int Slider::calcSliderPosition(int mouseX)
{
int x = qBound(grooveMin, mouseX, grooveMax);
qreal pos = (qreal) (x - grooveMin) / (grooveMax - grooveMin) * (maximum_ - minimum_) + minimum_;
return qRound(pos);
}
int Slider::calcSubLength(int value)
{
return handle.width() / 4 + (sub.width() - handle.width() / 2) * (value - minimum_) / (maximum_ - minimum_);
}
void Slider::updatePixmapPosition()
{
grooveMin = (width() - sub.width()) / 2;
grooveMax = width() - grooveMin;
groovePoint = QPoint((width() - groove.width()) / 2, (height() - groove.height()) / 2);
subPoint = QPoint((width() - sub.width()) / 2, (height() - sub.height()) / 2);
}
void Slider::setValue(int value)
{
if (value == value_)
return;
setSliderPosition(value);
value_ = value;
emit valueChanged(value);
}
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