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BrushPen.cpp
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BrushPen.cpp
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#include "BrushPen.h"
BrushPen::BrushPen(QGraphicsItem *parent)
{
}
BrushPen::BrushPen(qreal width, qreal height, QGraphicsItem *parent)
{
boundingH = height;
boundingW = width;
}
BrushPen::~BrushPen()
{
}
void BrushPen::setBrush(bool checkBoxROI) {
this->checkBoxBrush = checkBoxROI;
}
QRectF BrushPen::boundingRect() const
{
//根据图像的范围设定最大边界
return QRectF(0, 0, boundingW, boundingH);
}
void BrushPen::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
QWidget *widget)
{
//drawing不断重新绘制矩形,直到lastDraw
if (drawing) {
QPen pen(Qt::red, brushSize);
painter->setPen(pen);
QRectF outRect(mousePos - ellipSize, mousePos + ellipSize);
painter->drawEllipse(outRect);
}
if (lastDraw) {
QPen pen(Qt::red, brushSize);
painter->setPen(pen);
QRectF outRect(mousePos - ellipSize, mousePos + ellipSize);
painter->drawEllipse(outRect);
}
update();
}
void BrushPen::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
//需要已选择ROI选项,按下左键开始绘制矩形
if (checkBoxBrush) {
drawing = true;
mousePos = event->pos();
}
}
void BrushPen::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
//移动过程中不断更新矩形的边界信息
mousePos = event->pos();
}
void BrushPen::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
//鼠标抬起后结束动态绘制
drawing = false;
lastDraw = true;
}