GraphicsPathIterator.Enumerate(PointF[], Byte[]) Metoda
Definice
Důležité
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Zkopíruje PathPoints vlastnosti a PathTypes pole vlastností přidruženého GraphicsPath do dvou zadaných polí.
public:
int Enumerate(cli::array <System::Drawing::PointF> ^ % points, cli::array <System::Byte> ^ % types);
public int Enumerate (ref System.Drawing.PointF[] points, ref byte[] types);
member this.Enumerate : PointF[] * Byte[] -> int
Public Function Enumerate (ByRef points As PointF(), ByRef types As Byte()) As Integer
Parametry
- types
- Byte[]
Při návratu obsahuje pole bajtů, které představuje typy bodů v cestě.
Návraty
Počet zkopírovaných bodů.
Příklady
Následující příklad je navržený pro použití s model Windows Forms a vyžaduje PaintEventArgse
OnPaint objekt události. Kód provede následující akce:
Vytvoří cestu grafiky.
Naplní ho několika primitivy a některými značkami.
Seznamy data cesty na levé straně obrazovky.
GraphicsPathIterator Vytvoří a převije ho zpět.
Zvýší index dat cesty na druhou značku.
Zavolá metodu Enumerate pro zkopírování dat cesty do
points
polí atypes
.Seznamy tato zkopírovaná data na pravé straně obrazovky.
public:
void EnumerateExample( PaintEventArgs^ e )
{
GraphicsPath^ myPath = gcnew GraphicsPath;
array<Point>^ myPoints = {Point(20,20),Point(120,120),Point(20,120),Point(20,20)};
Rectangle myRect = Rectangle(120,120,100,100);
myPath->AddLines( myPoints );
myPath->AddRectangle( myRect );
myPath->AddEllipse( 220, 220, 100, 100 );
// Get the total number of points for the path, and arrays of
// the points and types.
int myPathPointCount = myPath->PointCount;
array<PointF>^myPathPoints = myPath->PathPoints;
array<Byte>^myPathTypes = myPath->PathTypes;
// Set up variables for listing the array of points on the left
// side of the screen.
int i;
float j = 20;
System::Drawing::Font^ myFont = gcnew System::Drawing::Font( "Arial",8 );
SolidBrush^ myBrush = gcnew SolidBrush( Color::Black );
// List the set of points and types and types to the left side
// of the screen.
e->Graphics->DrawString( "Original Data", myFont, myBrush, 20, j );
j += 20;
for ( i = 0; i < myPathPointCount; i++ )
{
e->Graphics->DrawString( myPathPoints[ i ].X + ", " + myPathPoints[ i ].Y + ", " + myPathTypes[ i ], myFont, myBrush, 20, j );
j += 20;
}
// Create a GraphicsPathIterator for myPath.
GraphicsPathIterator^ myPathIterator = gcnew GraphicsPathIterator( myPath );
myPathIterator->Rewind();
array<PointF>^points = gcnew array<PointF>(myPathIterator->Count);
array<Byte>^types = gcnew array<Byte>(myPathIterator->Count);
// int numPoints = myPathIterator->Enumerate(&points, &types);
// Draw the set of copied points and types to the screen.
j = 20;
e->Graphics->DrawString( "Copied Data", myFont, myBrush, 200, j );
j += 20;
for ( i = 0; i < points->Length; i++ )
{
e->Graphics->DrawString( String::Format( "Point: {0}, Value: {1}, Type: {2}", i, points[ i ], types[ i ] ), myFont, myBrush, 200, j );
j += 20;
}
}
public void EnumerateExample(PaintEventArgs e)
{
GraphicsPath myPath = new GraphicsPath();
Point[] myPoints =
{
new Point(20, 20),
new Point(120, 120),
new Point(20, 120),
new Point(20, 20)
};
Rectangle myRect = new Rectangle(120, 120, 100, 100);
myPath.AddLines(myPoints);
myPath.AddRectangle(myRect);
myPath.AddEllipse(220, 220, 100, 100);
// Get the total number of points for the path, and arrays of
// the points and types.
int myPathPointCount = myPath.PointCount;
PointF[] myPathPoints = myPath.PathPoints;
byte[] myPathTypes = myPath.PathTypes;
// Set up variables for listing the array of points on the left
// side of the screen.
int i;
float j = 20;
Font myFont = new Font("Arial", 8);
SolidBrush myBrush = new SolidBrush(Color.Black);
// List the set of points and types and types to the left side
// of the screen.
e.Graphics.DrawString("Original Data",
myFont,
myBrush,
20,
j);
j += 20;
for(i=0; i<myPathPointCount; i++)
{
e.Graphics.DrawString(myPathPoints[i].X.ToString()+
", " + myPathPoints[i].Y.ToString() + ", " +
myPathTypes[i].ToString(),
myFont,
myBrush,
20,
j);
j+=20;
}
// Create a GraphicsPathIterator for myPath.
GraphicsPathIterator myPathIterator =
new GraphicsPathIterator(myPath);
myPathIterator.Rewind();
PointF[] points = new PointF[myPathIterator.Count];
byte[] types = new byte[myPathIterator.Count];
int numPoints = myPathIterator.Enumerate(ref points, ref types);
// Draw the set of copied points and types to the screen.
j = 20;
e.Graphics.DrawString("Copied Data",
myFont,
myBrush,
200,
j);
j += 20;
for(i=0; i<points.Length; i++)
{
e.Graphics.DrawString("Point: " + i +
", " + "Value: " + points[i].ToString() + ", " +
"Type: " + types[i].ToString(),
myFont,
myBrush,
200,
j);
j+=20;
}
}
Public Sub EnumerateExample(ByVal e As PaintEventArgs)
Dim myPath As New GraphicsPath
Dim myPoints As Point() = {New Point(20, 20), _
New Point(120, 120), New Point(20, 120), New Point(20, 20)}
Dim myRect As New Rectangle(120, 120, 100, 100)
myPath.AddLines(myPoints)
myPath.AddRectangle(myRect)
myPath.AddEllipse(220, 220, 100, 100)
' Get the total number of points for the path, and arrays of the
' points and types.
Dim myPathPointCount As Integer = myPath.PointCount
Dim myPathPoints As PointF() = myPath.PathPoints
Dim myPathTypes As Byte() = myPath.PathTypes
' Set up variables for listing the array of points on the left side
' of the screen.
Dim i As Integer
Dim j As Single = 20
Dim myFont As New Font("Arial", 8)
Dim myBrush As New SolidBrush(Color.Black)
' List the set of points and types and types to the left side of
' the screen.
e.Graphics.DrawString("Original Data", myFont, myBrush, 20, j)
j += 20
For i = 0 To myPathPointCount - 1
e.Graphics.DrawString(myPathPoints(i).X.ToString() & ", " & _
myPathPoints(i).Y.ToString() & ", " & _
myPathTypes(i).ToString(), myFont, myBrush, 20, j)
j += 20
Next i
' Create a GraphicsPathIterator for myPath.
Dim myPathIterator As New GraphicsPathIterator(myPath)
myPathIterator.Rewind()
Dim points(myPathIterator.Count) As PointF
Dim types(myPathIterator.Count) As Byte
Dim numPoints As Integer = myPathIterator.Enumerate(points, types)
' Draw the set of copied points and types to the screen.
j = 20
e.Graphics.DrawString("Copied Data", myFont, myBrush, 200, j)
j += 20
For i = 0 To points.Length - 1
e.Graphics.DrawString("Point: " & i & ", " & "Value: " & _
points(i).ToString() & ", " & "Type: " & _
types(i).ToString(), myFont, myBrush, 200, j)
j += 20
Next i
End Sub
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