source: trunk/Include/Classes/System/Drawing/RectangleF.ab@ 332

' Classes/System/Drawing/RectangleF.ab

#ifndef __SYSTEM_DRAWING_RECTANGLEF_AB__
#define __SYSTEM_DRAWING_RECTANGLEF_AB__

#include <Classes/System/Math.ab>
#include <Classes/System/Drawing/PointF.ab>
#include <Classes/System/Drawing/SizeF.ab>

Class RectangleF
Public
    Sub RectangleF()
        x = 0
        y = 0
        width = 0
        height = 0
    End Sub

    Sub RectangleF(x As Single, y As Single, width As Single, height As Single)
        x = x
        y = y
        width = width
        height = height
    End Sub

    Sub RectangleF(location As PointF, size As SizeF)
        x = location.X
        y = location.Y
        width = size.Height
        height = size.Height
    End Sub

    Sub RectangleF(rc As RectangleF)
        x = rc.x
        y = rc.y
        width = rc.width
        height = rc.height
    End Sub

    Function Location() As PointF
        Dim pt As PointF(x, y)
        Return pt
    End Function

    Sub Location(point As PointF)
        x = point.X
        y = point.Y
    End Sub

    Function Size() As SizeF
        Dim size As SizeF(width, height)
    End Function

    Sub Size(size As SizeF)
        width = size.Width
        height = size.Height
    End Sub

    Function X() As Single
        Return x
    End Function

    Sub X(value As Single)
        x = value
    End Sub

    Function Y() As Single
        Return y
    End Function

    Sub Y(value As Single)
        y = value
    End Sub

    Function Width() As Single
        Return width
    End Function

    Sub Width(value As Single)
        width = value
    End Sub

    Function Height() As Single
        Return height
    End Function

    Sub Height(value As Single)
        height = value
    End Sub

    Function Left() As Single
        Return X
    End Function

    Function Top() As Single
        Return Y
    End Function

    Function Right() As Single
        Return X + Width
    End Function

    Function Bottom() As Single
        Return Y + Height
    End Function

    Function IsEmpty() As Boolean
        Return Width <= 0 Or Height <= 0
    End Function

    Function Operator ==(rc As RectangleF) As Boolean
        Return Equals(rc)
    End Function

    Function Operator <>(rc As RectangleF) As Boolean
        Return Not Equals(rc)
    End Function

    Function Equals(rc As RectangleF) As Boolean
        Equals = (X = rc.X And Y = rc.Y And Width = rc.Width And Height = rc.Height)
    End Function

    Override Function GetHashCode() As Long
        Return GetDWord(VarPtr(x)) Xor _System_BSwap(GetDWord(VarPtr(y))) Xor GetDWord(VarPtr(width)) Xor _System_BSwap(GetDWord(VarPtr(height)))
    End Function

    Static Function FromLTRB(l As Single, t As Single, r As Single, b As Single) As RectangleF
        return New RectangleF(l, t, r - l, b - t)
    End Function

    Function Contains(x As Single, y As Single) As Boolean
        Contains = (x >= X And x < X + Width And y >= Y And y < Y + Height)
    End Function

    Function Contains(pt As PointF) As Boolean
        Return Contains(pt.X, pt.Y)
    End Function

    Function Contains(rc As RectangleF) As Boolean
        Contains = (X <= rc.X And rc.Right <= Right And Y <= rc.Y And rc.Bottom <= Bottom)
    End Function

    Sub Inflate(dx As Single, dy As Single)
        x -= dx
        y -= dy
        width += dx + dx
        height += dy + dy
    End Sub

    Sub Inflate(sz As SizeF)
        Inflate(sz.Width, sz.Height)
    End Sub

    Static Function Inflate(rc As RectangleF, x As Single, y As Single) As RectangleF
        Inflate = New RectangleF(rc.X, rc.Y, rc.Width, rc.Height)
        Inflate.Inflate(x, y)
    End Function

    Sub Intersect(rect As RectangleF)
        Dim r = RectangleF.Intersect(This, rect)
        x = r.x
        y = r.y
        width = r.width
        height = r.height
    End Sub
    
    Static Function Intersect(a As RectangleF, b As RectangleF) As RectangleF
        Dim right As Single, bottom As Single, left As Single, top As Single
        right = System.Math.Min(a.Right, b.Right)
        bottom = System.Math.Min(a.Bottom, b.Bottom)
        left = System.Math.Min(a.Left, b.Left)
        top = System.Math.Min(a.Top, b.Top)
        Return FromLTRB(left, top, right, bottom)
    End Function

    Function IntersectsWith(rc As RectangleF) As Boolean
        If Left < rc.Right And _
            Top < rc.Bottom And _
            Right > rc.Left And _
            Bottom > rc.Top Then
            IntersectsWith = True
        Else
            IntersectsWith = False
        End If
    End Function

    Static Function Union(a As RectangleF, b As RectangleF) As RectangleF
        Dim right As Single, bottom As Single, left As Single, top As Single
        right = System.Math.Max(a.Right(), b.Right())
        bottom = System.Math.Max(a.Bottom(), b.Bottom())
        left = System.Math.Max(a.Left(), b.Left())
        top = System.Math.Max(a.Top(), b.Top())
        Return FromLTRB(left, top, right, bottom)
    End Function

    Sub Offset(pt As PointF)
        Offset(pt.X, pt.Y)
    End Sub

    Sub Offset(dx As Single, dy As Single)
        x += dx
        y += dy
    End Sub

Public
    x As Single
    y As Single
    width As Single
    height As Single
End Class

#endif '__SYSTEM_DRAWING_RECTFANGLE_AB__