// </snippet12>
// The following code example demonstrates how use the Data from
// one region to set the Data for another region. This example is designed
// to be used with Windows Forms. To run this example paste
// it into a form and handle the form's Paint event
// by calling the DemonstrateRegionData2 method, passing e as PaintEventArgs.
// <snippet13>
private void DemonstrateRegionData2(PaintEventArgs e)
{
//Create a simple region.
Region region1 = new Region(new Rectangle(10, 10, 100, 100));
// Extract the region data.
System.Drawing.Drawing2D.RegionData region1Data = region1.GetRegionData();
byte[] data1;
data1 = region1Data.Data;
// Create a second region.
Region region2 = new Region();
// Get the region data for the second region.
System.Drawing.Drawing2D.RegionData region2Data = region2.GetRegionData();
// Set the Data property for the second region to the Data from the first region.
region2Data.Data = data1;
// Construct a third region using the modified RegionData of the second region.
Region region3 = new Region(region2Data);
// Dispose of the first and second regions.
region1.Dispose();
region2.Dispose();
// Call ExcludeClip passing in the third region.
e.Graphics.ExcludeClip(region3);
// Fill in the client rectangle.
e.Graphics.FillRectangle(Brushes.Red, this.ClientRectangle);
region3.Dispose();
}
public RegionData Clone()
{
RegionData rd = new RegionData();
if ( data != null )
{
rd.data = (byte[]) data.Clone();
}
return rd ;
}
public Region (RegionData rgnData)
{
if (rgnData == null)
throw new ArgumentNullException ("rgnData");
// a NullReferenceException can be throw for rgnData.Data.Length (if rgnData.Data is null) just like MS
if (rgnData.Data.Length == 0)
throw new ArgumentException ("rgnData");
Status status = GDIPlus.GdipCreateRegionRgnData (rgnData.Data, rgnData.Data.Length, out nativeRegion);
GDIPlus.CheckStatus (status);
}
public Region(RegionData rgnData)
{
if (rgnData == null)
{
throw new ArgumentNullException("rgnData");
}
IntPtr zero = IntPtr.Zero;
int status = SafeNativeMethods.Gdip.GdipCreateRegionRgnData(rgnData.Data, rgnData.Data.Length, out zero);
if (status != 0)
{
throw SafeNativeMethods.Gdip.StatusException(status);
}
this.SetNativeRegion(zero);
}
//</snippet11>
// The following code example demonstrates how to construct a Region
// using the RegionData class. This example is designed to be used with Windows
// Forms. To run this example paste it into a form and handle the form's Paint event
// by calling the DemonstrateRegionData method, passing e as PaintEventArgs.
// <snippet12>
private void DemonstrateRegionData(PaintEventArgs e)
{
//Create a simple region.
Region region1 = new Region(new Rectangle(10, 10, 100, 100));
// Extract the region data.
System.Drawing.Drawing2D.RegionData region1Data =
region1.GetRegionData();
// Create a new region using the region data.
Region region2 = new Region(region1Data);
// Dispose of the first region.
region1.Dispose();
// Call ExcludeClip passing in the second region.
e.Graphics.ExcludeClip(region2);
// Fill in the client rectangle.
e.Graphics.FillRectangle(Brushes.Red, this.ClientRectangle);
region2.Dispose();
}
public RegionData GetRegionData()
{
int size, filled;
Status status = GDIPlus.GdipGetRegionDataSize (nativeRegion, out size);
GDIPlus.CheckStatus (status);
byte[] buff = new byte [size];
status = GDIPlus.GdipGetRegionData (nativeRegion, buff, size, out filled);
GDIPlus.CheckStatus (status);
RegionData rgndata = new RegionData();
rgndata.Data = buff;
return rgndata;
}
public Region (RegionData region_data) : this((geom.Area)null)
{
throw new NotImplementedException ();
}
public PdnRegion(RegionData regionData)
{
this.gdiRegion = new Region(regionData);
}
/*
Region Constructor from given RegionData:
The region data is parsed
and operations are evaluated
on the returned region .
*/
internal Region ConstructRegion ( RegionData other )
{
return Evaluate( other.data ); // other.Data );
}
public Region(RegionData rgnData) {
if (rgnData == null)
throw new ArgumentNullException("rgnData");
IntPtr region = IntPtr.Zero;
int status = SafeNativeMethods.Gdip.GdipCreateRegionRgnData(rgnData.Data,
rgnData.Data.Length,
out region);
if (status != SafeNativeMethods.Gdip.Ok)
throw SafeNativeMethods.Gdip.StatusException(status);
SetNativeRegion(region);
}
public Region(RegionData otherRgnData)
{
if(otherRgnData == null)
{
throw new ArgumentNullException("rgnData", "Argument cannot be null");
}
Region r = otherRgnData.ConstructRegion ( otherRgnData ) ;
this.rects = r.rects ;
this.extent = r.extent ;
this.rgnData = r.GetRegionData() ;
}
public Region(RectangleF rect)
{
rgnData = new RegionData( rect );
if (rect.Width < 0)
rect = new RectangleF(rect.Right, rect.Top, -rect.Width, rect.Height);
if (rect.Height < 0)
rect = new RectangleF(rect.Left, rect.Bottom, rect.Width, -rect.Height);
if(rect.Width != 0 || rect.Height != 0)
{
extent = rect;
rects = new RectangleF[1];
rects[0] = rect;
}
else
{
// extent is already empty(0,0,0,0)
rects = new RectangleF[0];
}
}
public Region(GraphicsPath path)
{
if(path == null)
{
throw new ArgumentNullException("path", "Argument cannot be null");
}
rgnData = new RegionData( path );
}
// Constructors.
public Region()
{
rgnData = new RegionData() ;
MakeInfinite();
}
