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peg.cpp
108 lines (96 loc) · 3.36 KB
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peg.cpp
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#include "peg.h"
#include <QGraphicsItem>
#include <QGraphicsSceneMouseEvent>
#include <QGraphicsScene>
#include <QApplication>
#include <QDrag>
#include <QMimeData>
#include <QBitmap>
//
Peg::Peg(col c) {
switch (c) {
case col::RED: color = QColor{Qt::GlobalColor::red};
break;
case col::BLUE: color = QColor{Qt::GlobalColor::blue};
break;
case col::GREEN : color = QColor{Qt::GlobalColor::green};
break;
case col::YELLOW : color = QColor{Qt::GlobalColor::yellow};
break;
case col::BLACK : color = QColor{Qt::GlobalColor::black};
break;
case col::WHITE : color = QColor{Qt::GlobalColor::white};
break;
};
setToolTip(QString("QColor(%1, %2, %3)\n%4")
.arg(color.red()).arg(color.green()).arg(color.blue())
.arg("Click and drag this color onto the board!"));
setCursor(Qt::OpenHandCursor);
setAcceptedMouseButtons(Qt::LeftButton);
}
Peg::Peg(QColor c) : color{c} {
setToolTip(QString("QColor(%1, %2, %3)\n%4")
.arg(color.red()).arg(color.green()).arg(color.blue())
.arg("Click and drag this color onto the board!"));
setCursor(Qt::OpenHandCursor);
setAcceptedMouseButtons(Qt::LeftButton);
}
Peg::Peg(const Peg& c) : color{c.color} {
}
Peg& Peg::operator = (const Peg& rhs) {
Peg temp{rhs};
std::swap(color, temp.color);
return *this;
}
QRectF Peg::boundingRect() const {
return QRectF(-15.5, -15.5, 34, 34);
}
void Peg::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) {
Q_UNUSED(option);
Q_UNUSED(widget);
if (!dragged) {
painter->setPen(Qt::NoPen);
painter->setBrush(Qt::darkGray);
painter->drawEllipse(-12, -12, 30, 30);
}
painter->setPen(QPen(Qt::black, 1));
painter->setBrush(QBrush(color));
painter->drawEllipse(-15, -15, 30, 30);
}
void Peg::mousePressEvent(QGraphicsSceneMouseEvent *) {
setCursor(Qt::ClosedHandCursor);
}
void Peg::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
if (QLineF(event->screenPos(), event->buttonDownScreenPos(Qt::LeftButton))
.length() < QApplication::startDragDistance()) {
return;
}
dragged = true;
QDrag *drag = new QDrag(event->widget());
QMimeData *mime = new QMimeData;
drag->setMimeData(mime);
mime->setColorData(color);
mime->setText(QString("#%1%2%3")
.arg(color.red(), 2, 16, QLatin1Char('0'))
.arg(color.green(), 2, 16, QLatin1Char('0'))
.arg(color.blue(), 2, 16, QLatin1Char('0')));
QPixmap pixmap(34, 34);
pixmap.fill(Qt::white);
QPainter painter(&pixmap);
painter.translate(15, 15);
painter.setRenderHint(QPainter::Antialiasing);
paint(&painter, 0, 0);
painter.end();
pixmap.setMask(pixmap.createHeuristicMask());
drag->setPixmap(pixmap);
drag->setHotSpot(QPoint(15, 20));
drag->exec();
setCursor(Qt::OpenHandCursor);
dragged = false;
}
void Peg::mouseReleaseEvent(QGraphicsSceneMouseEvent *) {
setCursor(Qt::OpenHandCursor);
}
void Peg::add(QGraphicsScene& s) {
s.addItem(this);
}