110 lines
2.5 KiB
C++
110 lines
2.5 KiB
C++
#include "ControlItem.h"
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#include "BaseItem.h"
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#include <QDebug>
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//构造函数
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ControlItem::ControlItem(QGraphicsItemGroup* parent, QPointF p, int type) : QAbstractGraphicsShapeItem(parent)
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, point(p), pointType(type)
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{
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this->setPos(point);
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if (pointType == 0)
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{
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this->setCursor(Qt::OpenHandCursor);
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}
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else
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{
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this->setCursor(Qt::PointingHandCursor);
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this->setVisible(false);
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}
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this->setBrush(QBrush(QColor(0, 100, 250)));//控制点颜色
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setCacheMode(DeviceCoordinateCache);//设置缓冲 需要配合 update 使用
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//非常关键 确保点击子元素不会丢失焦点
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this->setFlags(QGraphicsItem::ItemIsSelectable |
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QGraphicsItem::ItemIsMovable |
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ItemStopsFocusHandling);
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MQRect = QRectF(-BaseItem::ContrSize, -BaseItem::ContrSize, BaseItem::ContrSize * 2, BaseItem::ContrSize * 2);
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myPen.setWidthF(0);//缩放后线宽 0 为任何情况下1像素
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}
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QPointF ControlItem::GetPoint()
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{
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return point;
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}
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void ControlItem::SetPoint(QPointF p)
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{
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point = p;
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this->update();
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}
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//拖拽 鼠标感应区域
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QRectF ControlItem::boundingRect() const
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{
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return MQRect;
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}
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//位置重绘
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void ControlItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
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{
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//位置重绘
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Q_UNUSED(option);
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Q_UNUSED(widget);
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painter->setPen(myPen);
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painter->setBrush(this->brush());
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this->setPos(point);
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if (pointType == 0) //0号点默认为中心点
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{
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painter->drawRect(MQRect); //拖拽,显示框
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}
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else
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{
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//浮点型椭圆、整数椭圆缩放时会出问题
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painter->drawEllipse(MQRect);
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}
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}
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//鼠标事件处理
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void ControlItem::mouseMoveEvent(QGraphicsSceneMouseEvent* event)
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{
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if (event->buttons() == Qt::LeftButton)
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{
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dx = event->scenePos().x() - event->lastScenePos().x();
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dy = event->scenePos().y() - event->lastScenePos().y();
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BaseItem* item = static_cast<BaseItem*>(this->parentItem());
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if (pointType == 0)
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{
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item->moveBy(dx, dy);
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}
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else
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{
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//记录上一次坐标结果
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BefPoint = point;
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point = this->mapToParent(event->pos());
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//更新结果
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bool flg = item->UpDate(pointType);
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if (flg)
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{
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//结果正常、更新位置
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this->setPos(point);
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}
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else
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{
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//结果异常、退回上一次的位置
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point = BefPoint;
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this->setPos(point);
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}
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}
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}
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}
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void ControlItem::mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event)
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{
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if (pointType == 0)
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{
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//点击中心点时、激活编辑
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BaseItem* item = static_cast<BaseItem*>(this->parentItem());
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item->setFocus();
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}
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QGraphicsItem::mousePressEvent(event);
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}
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