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build5/epsilon-master/kandinsky/src/rect.cpp 4.04 KB
6663b6c9   adorian   projet complet av...
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  #include <kandinsky/rect.h>
  
  KDRect::KDRect(KDPoint p, KDSize s) :
    m_x(p.x()), m_y(p.y()),
    m_width(s.width()), m_height(s.height())
  {
  }
  
  KDRect::KDRect(KDCoordinate x, KDCoordinate y, KDSize s) :
    m_x(x), m_y(y),
    m_width(s.width()), m_height(s.height())
  {
  }
  
  KDRect::KDRect(KDPoint p, KDCoordinate width, KDCoordinate height) :
    m_x(p.x()), m_y(p.y()),
    m_width(width), m_height(height)
  {
  }
  
  void KDRect::setOrigin(KDPoint p) { m_x = p.x(); m_y = p.y(); }
  void KDRect::setSize(KDSize s) { m_width = s.width(); m_height = s.height(); }
  
  bool KDRect::intersects(const KDRect & other) const {
    return (
        other.right() >= left() &&
        other.left() <= right() &&
        other.top() <= bottom() &&
        other.bottom() >= top()
        );
  }
  
  KDRect KDRect::intersectedWith(const KDRect & other) const {
    if (!intersects(other)) {
      return KDRectZero;
    }
  
    KDCoordinate intersectionLeft = max(left(), other.left());
    KDCoordinate intersectionRight = min(right(), other.right());
    KDCoordinate intersectionTop = max(top(), other.top());
    KDCoordinate intersectionBottom = min(bottom(), other.bottom());
  
    return KDRect(
        intersectionLeft,
        intersectionTop,
        intersectionRight-intersectionLeft+1,
        intersectionBottom-intersectionTop+1);
  }
  
  void computeUnionBound(KDCoordinate size1, KDCoordinate size2,
      KDCoordinate * outputMin, KDCoordinate * outputMax,
      KDCoordinate min1, KDCoordinate min2,
      KDCoordinate max1, KDCoordinate max2)
  {
    if (size1 != 0) {
      if (size2 != 0) {
        *outputMin = min(min1, min2);
        *outputMax = max(max1, max2);
      } else {
        *outputMin = min1;
        *outputMax = max1;
      }
    } else {
      if (size2 != 0) {
        *outputMin = min2;
        *outputMax = max2;
      }
    }
  }
  
  KDRect KDRect::unionedWith(const KDRect & other) const {
    if (this->isEmpty()) {
      return other;
    }
    if (other.isEmpty()) {
      return *this;
    }
    /* We should ignore coordinate whose size is zero
     * For example, if r1.height is zero, just ignore r1.y and r1.height. */
  
    KDCoordinate resultLeft = 0;
    KDCoordinate resultTop = 0;
    KDCoordinate resultRight = 0;
    KDCoordinate resultBottom = 0;
  
    computeUnionBound(width(), other.width(),
        &resultLeft, &resultRight,
        left(), other.left(),
        right(), other.right());
  
    computeUnionBound(height(), other.height(),
        &resultTop, &resultBottom,
        top(), other.top(),
        bottom(), other.bottom());
  
    return KDRect(
      resultLeft,
      resultTop,
      resultRight-resultLeft+1,
      resultBottom-resultTop+1
      );
  }
  
  KDRect KDRect::differencedWith(const KDRect & other) const {
    if (this->isEmpty() || other.isEmpty()) {
      return *this;
    }
  
    KDRect intersection = intersectedWith(other);
    if (intersection.isEmpty()) {
      return *this;
    }
  
    if (intersection == *this) {
      return KDRectZero;
    }
  
    KDCoordinate resultLeft = left();
    KDCoordinate resultTop = top();
    KDCoordinate resultRight = right();
    KDCoordinate resultBottom = bottom();
  
    if (intersection.height() == height()) {
      if (intersection.left() == left()) {
        resultLeft = intersection.right() + 1;
      } else if (intersection.right() == right()) {
        resultRight = intersection.left() - 1;
      }
    } else if (intersection.width() == width()) {
      if (intersection.top() == top()) {
        resultTop = intersection.bottom() + 1;
      } else if (intersection.bottom() == bottom()) {
        resultBottom = intersection.top() - 1;
      }
    }
  
    return KDRect(
      resultLeft,
      resultTop,
      resultRight-resultLeft+1,
      resultBottom-resultTop+1
      );
  }
  
  bool KDRect::contains(KDPoint p) const {
    return (p.x() >= x() && p.x() <= right() && p.y() >= y() && p.y() <= bottom());
  }
  
  bool KDRect::isAbove(KDPoint p) const {
    return (p.y() >= y());
  }
  
  bool KDRect::isUnder(KDPoint p) const {
    return (p.y() <= bottom());
  }
  
  KDRect KDRect::translatedBy(KDPoint p) const {
    return KDRect(x() + p.x(), y() + p.y(), width(), height());
  }
  
  KDRect KDRect::movedTo(KDPoint p) const {
    return KDRect(p.x(), p.y(), width(), height());
  }
  
  bool KDRect::isEmpty() const {
    return (width() == 0 || height() == 0);
  }