Exemple #1
0
// hotHandle: 绘新图时，起始步骤为-1，后续步骤>0；拖动一个或多个整体图形时为-1，拖动顶点时>=0
Point2d MgCmdManagerImpl::snapPoint(const MgMotion* sender, const Point2d& orignPt, const MgShape* shape,
                                    int hotHandle, int ignoreHandle, const int* ignoreids)
{
    int ignoreids_tmp[2] = { shape ? shape->getID() : 0, 0 };
    if (!ignoreids) ignoreids = ignoreids_tmp;
    
    if (!shape || hotHandle >= shape->shapec()->getHandleCount()) {
        hotHandle = -1;         // 对hotHandle进行越界检查
    }
    _ptSnap = orignPt;   // 默认结果为当前触点位置
    
    SnapItem arr[3] = {         // 设置捕捉容差和捕捉初值
        SnapItem(_ptSnap, _ptSnap, displayMmToModel(3.f, sender)),  // XY点捕捉
        SnapItem(_ptSnap, _ptSnap, displayMmToModel(1.f, sender)),  // X分量捕捉，竖直线
        SnapItem(_ptSnap, _ptSnap, displayMmToModel(1.f, sender)),  // Y分量捕捉，水平线
    };
    
    if (shape && shape->getID() == 0 && hotHandle > 0               // 绘图命令中的临时图形
        && !shape->shapec()->isCurve()
        && !shape->shapec()->isKindOf(MgBaseRect::Type())) {        // 不是矩形或椭圆
        Point2d pt (orignPt);
        snapHV(shape->shapec()->getPoint(hotHandle - 1), pt, arr);  // 和上一个点对齐
    }
    
    Point2d pnt(-1e10f, -1e10f);                    // 当前图形的某一个顶点匹配到其他顶点pnt
    bool matchpt = (shape && shape->getID() != 0    // 拖动整个图形
                    && (hotHandle < 0 || (ignoreHandle >= 0 && ignoreHandle != hotHandle)));
    
    snapPoints(sender, orignPt, shape, ignoreHandle, ignoreids,
               arr, matchpt ? &pnt : NULL);         // 在所有图形中捕捉
    checkResult(arr);
    
    return matchpt && pnt.x > -1e8f ? pnt : _ptSnap;    // 顶点匹配优先于用触点捕捉结果
}
Exemple #2
0
void EditArea::mouseReleaseEvent(QMouseEvent *)
{
    if (mode == drawMode) //drew "add line" line
    {
        snapPoints(startPos, lastPos);
    }
    else if (mode == deleteMode) //drew "delete" line
    {
        QLineF line(startPos, lastPos);
        QVector<QVector<QPointF> > newdata;
        QVector<QPointF> st;
        QPointF trash;
        for (int i = 0; i < map.size(); i++)
        {
            if (map[i].size() >= 1)
                st.push_back(map[i][0]);
            for (int j = 0; j < map[i].size() - 1; j++)
            {
                QLineF tmpline(map[i][j], map[i][j + 1]);
                if (line.intersect(tmpline, &trash) == QLineF::BoundedIntersection)
                {
                    emit mapChanged();
                    if (st.size() >= 2)
                        newdata.push_back(st);
                    st.clear();
                }
                st.push_back(map[i][j + 1]);
            }
            if (st.size() >= 2)
                newdata.push_back(st);
            st.clear();
        }
        map = newdata;
    }
    mode = noMode;
    update();
}