GraphicsPathIterator::Enumerate Method (array<PointF>^%, array<Byte>^%)
Copies the PathPoints property and PathTypes property arrays of the associated GraphicsPath into the two specified arrays.
Assembly: System.Drawing (in System.Drawing.dll)
Parameters
- points
-
Type:
array<System.Drawing::PointF>^%
Upon return, contains an array of PointF structures that represents the points in the path.
- types
-
Type:
array<System::Byte>^%
Upon return, contains an array of bytes that represents the types of points in the path.
The following example is designed for use with Windows Forms, and it requires PaintEventArgse, an OnPaint event object. The code performs the following actions:
Creates a graphics path.
Populates it with several primitives and some markers.
Lists the path data on the left side of the screen.
Creates a GraphicsPathIterator and rewinds it.
Increments the path data index to the second marker.
Calls the Enumerate method to copy the path data to the points and types arrays.
Lists this copied data on the right side of the screen.
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; } }
Available since 1.1