CustomLineCap.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / CommonUI / System / Drawing / Advanced / CustomLineCap.cs / 1305376 / CustomLineCap.cs

                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Drawing.Drawing2D { 
 
    using Microsoft.Win32;
    using System; 
    using System.ComponentModel;
    using System.Diagnostics;
    using System.Drawing;
    using System.Drawing.Internal; 
    using System.Runtime.InteropServices;
    using System.Globalization; 
    using System.Runtime.Versioning; 

    ///  
    /// 
    ///    Encapsulates a custom user-defined line
    ///    cap.
    ///  
    public class CustomLineCap : MarshalByRefObject, ICloneable, IDisposable {
 
#if FINALIZATION_WATCH 
        private string allocationSite = Graphics.GetAllocationStack();
#endif 


        /*
         * Handle to native line cap object 
         */
 
        internal IntPtr nativeCap; 

        // For subclass creation 
        internal CustomLineCap() {}

        /// 
        ///  
        ///    
        ///       Initializes a new instance of the  class with the specified outline 
        ///       and fill. 
        ///    
        ///  
        [ResourceExposure(ResourceScope.Process)]
        [ResourceConsumption(ResourceScope.Process)]
        public CustomLineCap(GraphicsPath fillPath,
                             GraphicsPath strokePath) : 
            this(fillPath, strokePath, LineCap.Flat) {}
 
        ///  
        /// 
        ///     
        ///       Initializes a new instance of the  class from the
        ///       specified existing  with the specified outline and
        ///       fill.
        ///     
        /// 
        [ResourceExposure(ResourceScope.Process)] 
        [ResourceConsumption(ResourceScope.Process)] 
        public CustomLineCap(GraphicsPath fillPath,
                             GraphicsPath strokePath, 
                             LineCap baseCap) :
            this(fillPath, strokePath, baseCap, 0) {}

        ///  
        /// 
        ///     
        ///       Initializes a new instance of the  class from the 
        ///       specified existing  with the specified outline, fill, and
        ///       inset. 
        ///    
        /// 
        [ResourceExposure(ResourceScope.Process)]
        [ResourceConsumption(ResourceScope.Process)] 
        public CustomLineCap(GraphicsPath fillPath,
                             GraphicsPath strokePath, 
                             LineCap baseCap, 
                             float baseInset)
        { 
            IntPtr nativeCap = IntPtr.Zero;

            int status = SafeNativeMethods.Gdip.GdipCreateCustomLineCap(
                                new HandleRef(fillPath, (fillPath == null) ? IntPtr.Zero : fillPath.nativePath), 
                                new HandleRef(strokePath, (strokePath == null) ? IntPtr.Zero : strokePath.nativePath),
                                baseCap, baseInset, out nativeCap); 
 
            if (status != SafeNativeMethods.Gdip.Ok)
                throw SafeNativeMethods.Gdip.StatusException(status); 

            SetNativeLineCap(nativeCap);
        }
 
        internal CustomLineCap(IntPtr nativeLineCap)
        { 
            SetNativeLineCap(nativeLineCap); 
        }
 
        internal void SetNativeLineCap(IntPtr handle) {
            if (handle == IntPtr.Zero)
                throw new ArgumentNullException("handle");
 
            nativeCap = handle;
        } 
 
        /// 
        ///  
        ///    Cleans up Windows resources for this
        /// .
        /// 
        public void Dispose() { 
            Dispose(true);
            GC.SuppressFinalize(this); 
        } 

        ///  
        protected virtual void Dispose(bool disposing) {
#if FINALIZATION_WATCH
            if (!disposing && nativeCap != IntPtr.Zero)
                Debug.WriteLine("**********************\nDisposed through finalization:\n" + allocationSite); 
#endif
 
            if (nativeCap != IntPtr.Zero) { 
                try{
#if DEBUG 
                    int status =
#endif
                    SafeNativeMethods.Gdip.GdipDeleteCustomLineCap(new HandleRef(this, nativeCap));
#if DEBUG 
                    Debug.Assert(status == SafeNativeMethods.Gdip.Ok, "GDI+ returned an error status: " + status.ToString(CultureInfo.InvariantCulture));
#endif 
                } 
                catch( Exception ex ){
                    if( ClientUtils.IsSecurityOrCriticalException( ex ) ) { 
                        throw;
                    }

                    Debug.Fail( "Exception thrown during Dispose: " + ex.ToString() ); 
                }
                finally{ 
                    nativeCap = IntPtr.Zero; 
                }
            } 
        }

        /// 
        ///  
        ///    Cleans up Windows resources for this
        /// . 
        ///  
        ~CustomLineCap() {
            Dispose(false); 
        }

        /// 
        ///  
        ///    Creates an exact copy of this .
        ///  
        [ResourceExposure(ResourceScope.Process)] 
        [ResourceConsumption(ResourceScope.Process)]
        public object Clone() 
        {
            IntPtr cloneCap = IntPtr.Zero;

            int status = SafeNativeMethods.Gdip.GdipCloneCustomLineCap(new HandleRef(this, nativeCap), out cloneCap); 

            if (status != SafeNativeMethods.Gdip.Ok) 
                throw SafeNativeMethods.Gdip.StatusException(status); 

            return CustomLineCap.CreateCustomLineCapObject(cloneCap); 
       }

       internal static CustomLineCap CreateCustomLineCapObject(IntPtr cap)
       { 
            CustomLineCapType capType = 0;
 
            int status = SafeNativeMethods.Gdip.GdipGetCustomLineCapType(new HandleRef(null, cap), out capType); 

            if (status != SafeNativeMethods.Gdip.Ok) 
            {
                SafeNativeMethods.Gdip.GdipDeleteCustomLineCap(new HandleRef(null, cap));
                throw SafeNativeMethods.Gdip.StatusException(status);
            } 

            switch (capType) 
            { 
            case CustomLineCapType.Default:
                return new CustomLineCap(cap); 

            case CustomLineCapType.AdjustableArrowCap:
                return new AdjustableArrowCap(cap);
            } 

            SafeNativeMethods.Gdip.GdipDeleteCustomLineCap(new HandleRef(null, cap)); 
            throw SafeNativeMethods.Gdip.StatusException(SafeNativeMethods.Gdip.NotImplemented); 
        }
 
        /// 
        /// 
        ///    Sets the caps used to start and end lines.
        ///  
        public void SetStrokeCaps(LineCap startCap, LineCap endCap)
        { 
            int status = SafeNativeMethods.Gdip.GdipSetCustomLineCapStrokeCaps(new HandleRef(this, nativeCap), startCap, endCap); 

            if (status != SafeNativeMethods.Gdip.Ok) 
                throw SafeNativeMethods.Gdip.StatusException(status);
        }

        ///  
        /// 
        ///    Gets the caps used to start and end lines. 
        ///  
        public void GetStrokeCaps(out LineCap startCap, out LineCap endCap)
        { 
            int status = SafeNativeMethods.Gdip.GdipGetCustomLineCapStrokeCaps(new HandleRef(this, nativeCap), out startCap, out endCap);

            if (status != SafeNativeMethods.Gdip.Ok)
                throw SafeNativeMethods.Gdip.StatusException(status); 
        }
 
        private void _SetStrokeJoin(LineJoin lineJoin) 
        {
            int status = SafeNativeMethods.Gdip.GdipSetCustomLineCapStrokeJoin(new HandleRef(this, nativeCap), lineJoin); 

            if (status != SafeNativeMethods.Gdip.Ok)
                throw SafeNativeMethods.Gdip.StatusException(status);
        } 

        private LineJoin _GetStrokeJoin() 
        { 
            LineJoin lineJoin;
 
            int status = SafeNativeMethods.Gdip.GdipGetCustomLineCapStrokeJoin(new HandleRef(this, nativeCap), out lineJoin);

            if (status != SafeNativeMethods.Gdip.Ok)
                throw SafeNativeMethods.Gdip.StatusException(status); 

            return lineJoin; 
        } 

        ///  
        /// 
        ///    Gets or sets the  used by this custom cap.
        /// 
        public LineJoin StrokeJoin 
        {
            get { return _GetStrokeJoin(); } 
            set { _SetStrokeJoin(value); } 
        }
 
        private void _SetBaseCap(LineCap baseCap)
        {
            int status = SafeNativeMethods.Gdip.GdipSetCustomLineCapBaseCap(new HandleRef(this, nativeCap), baseCap);
 
            if (status != SafeNativeMethods.Gdip.Ok)
                throw SafeNativeMethods.Gdip.StatusException(status); 
        } 

        private LineCap _GetBaseCap() 
        {
            LineCap baseCap;
            int status = SafeNativeMethods.Gdip.GdipGetCustomLineCapBaseCap(new HandleRef(this, nativeCap), out baseCap);
 
            if (status != SafeNativeMethods.Gdip.Ok)
                throw SafeNativeMethods.Gdip.StatusException(status); 
 
            return baseCap;
        } 

        /// 
        /// 
        ///    Gets or sets the  on which this  is based. 
        /// 
        public LineCap BaseCap 
        { 
            get { return _GetBaseCap(); }
            set { _SetBaseCap(value); } 
        }

        private void _SetBaseInset(float inset)
        { 
            int status = SafeNativeMethods.Gdip.GdipSetCustomLineCapBaseInset(new HandleRef(this, nativeCap), inset);
 
            if (status != SafeNativeMethods.Gdip.Ok) 
                throw SafeNativeMethods.Gdip.StatusException(status);
        } 

        private float _GetBaseInset()
        {
            float inset; 
            int status = SafeNativeMethods.Gdip.GdipGetCustomLineCapBaseInset(new HandleRef(this, nativeCap), out inset);
 
            if (status != SafeNativeMethods.Gdip.Ok) 
                throw SafeNativeMethods.Gdip.StatusException(status);
 
            return inset;
        }

        ///  
        /// 
        ///    Gets or sets the distance between the cap 
        ///    and the line. 
        /// 
        public float BaseInset 
        {
            get { return _GetBaseInset(); }
            set { _SetBaseInset(value); }
        } 

        private void _SetWidthScale(float widthScale) 
        { 
            int status = SafeNativeMethods.Gdip.GdipSetCustomLineCapWidthScale(new HandleRef(this, nativeCap), widthScale);
 
            if (status != SafeNativeMethods.Gdip.Ok)
                throw SafeNativeMethods.Gdip.StatusException(status);
        }
 
        private float _GetWidthScale()
        { 
            float widthScale; 
            int status = SafeNativeMethods.Gdip.GdipGetCustomLineCapWidthScale(new HandleRef(this, nativeCap), out widthScale);
 
            if (status != SafeNativeMethods.Gdip.Ok)
                throw SafeNativeMethods.Gdip.StatusException(status);

            return widthScale; 
        }
 
        ///  
        /// 
        ///    Gets or sets the amount by which to scale 
        ///    the width of the cap.
        /// 
        public float WidthScale
        { 
            get { return _GetWidthScale(); }
            set { _SetWidthScale(value); } 
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Drawing.Drawing2D { 
 
    using Microsoft.Win32;
    using System; 
    using System.ComponentModel;
    using System.Diagnostics;
    using System.Drawing;
    using System.Drawing.Internal; 
    using System.Runtime.InteropServices;
    using System.Globalization; 
    using System.Runtime.Versioning; 

    ///  
    /// 
    ///    Encapsulates a custom user-defined line
    ///    cap.
    ///  
    public class CustomLineCap : MarshalByRefObject, ICloneable, IDisposable {
 
#if FINALIZATION_WATCH 
        private string allocationSite = Graphics.GetAllocationStack();
#endif 


        /*
         * Handle to native line cap object 
         */
 
        internal IntPtr nativeCap; 

        // For subclass creation 
        internal CustomLineCap() {}

        /// 
        ///  
        ///    
        ///       Initializes a new instance of the  class with the specified outline 
        ///       and fill. 
        ///    
        ///  
        [ResourceExposure(ResourceScope.Process)]
        [ResourceConsumption(ResourceScope.Process)]
        public CustomLineCap(GraphicsPath fillPath,
                             GraphicsPath strokePath) : 
            this(fillPath, strokePath, LineCap.Flat) {}
 
        ///  
        /// 
        ///     
        ///       Initializes a new instance of the  class from the
        ///       specified existing  with the specified outline and
        ///       fill.
        ///     
        /// 
        [ResourceExposure(ResourceScope.Process)] 
        [ResourceConsumption(ResourceScope.Process)] 
        public CustomLineCap(GraphicsPath fillPath,
                             GraphicsPath strokePath, 
                             LineCap baseCap) :
            this(fillPath, strokePath, baseCap, 0) {}

        ///  
        /// 
        ///     
        ///       Initializes a new instance of the  class from the 
        ///       specified existing  with the specified outline, fill, and
        ///       inset. 
        ///    
        /// 
        [ResourceExposure(ResourceScope.Process)]
        [ResourceConsumption(ResourceScope.Process)] 
        public CustomLineCap(GraphicsPath fillPath,
                             GraphicsPath strokePath, 
                             LineCap baseCap, 
                             float baseInset)
        { 
            IntPtr nativeCap = IntPtr.Zero;

            int status = SafeNativeMethods.Gdip.GdipCreateCustomLineCap(
                                new HandleRef(fillPath, (fillPath == null) ? IntPtr.Zero : fillPath.nativePath), 
                                new HandleRef(strokePath, (strokePath == null) ? IntPtr.Zero : strokePath.nativePath),
                                baseCap, baseInset, out nativeCap); 
 
            if (status != SafeNativeMethods.Gdip.Ok)
                throw SafeNativeMethods.Gdip.StatusException(status); 

            SetNativeLineCap(nativeCap);
        }
 
        internal CustomLineCap(IntPtr nativeLineCap)
        { 
            SetNativeLineCap(nativeLineCap); 
        }
 
        internal void SetNativeLineCap(IntPtr handle) {
            if (handle == IntPtr.Zero)
                throw new ArgumentNullException("handle");
 
            nativeCap = handle;
        } 
 
        /// 
        ///  
        ///    Cleans up Windows resources for this
        /// .
        /// 
        public void Dispose() { 
            Dispose(true);
            GC.SuppressFinalize(this); 
        } 

        ///  
        protected virtual void Dispose(bool disposing) {
#if FINALIZATION_WATCH
            if (!disposing && nativeCap != IntPtr.Zero)
                Debug.WriteLine("**********************\nDisposed through finalization:\n" + allocationSite); 
#endif
 
            if (nativeCap != IntPtr.Zero) { 
                try{
#if DEBUG 
                    int status =
#endif
                    SafeNativeMethods.Gdip.GdipDeleteCustomLineCap(new HandleRef(this, nativeCap));
#if DEBUG 
                    Debug.Assert(status == SafeNativeMethods.Gdip.Ok, "GDI+ returned an error status: " + status.ToString(CultureInfo.InvariantCulture));
#endif 
                } 
                catch( Exception ex ){
                    if( ClientUtils.IsSecurityOrCriticalException( ex ) ) { 
                        throw;
                    }

                    Debug.Fail( "Exception thrown during Dispose: " + ex.ToString() ); 
                }
                finally{ 
                    nativeCap = IntPtr.Zero; 
                }
            } 
        }

        /// 
        ///  
        ///    Cleans up Windows resources for this
        /// . 
        ///  
        ~CustomLineCap() {
            Dispose(false); 
        }

        /// 
        ///  
        ///    Creates an exact copy of this .
        ///  
        [ResourceExposure(ResourceScope.Process)] 
        [ResourceConsumption(ResourceScope.Process)]
        public object Clone() 
        {
            IntPtr cloneCap = IntPtr.Zero;

            int status = SafeNativeMethods.Gdip.GdipCloneCustomLineCap(new HandleRef(this, nativeCap), out cloneCap); 

            if (status != SafeNativeMethods.Gdip.Ok) 
                throw SafeNativeMethods.Gdip.StatusException(status); 

            return CustomLineCap.CreateCustomLineCapObject(cloneCap); 
       }

       internal static CustomLineCap CreateCustomLineCapObject(IntPtr cap)
       { 
            CustomLineCapType capType = 0;
 
            int status = SafeNativeMethods.Gdip.GdipGetCustomLineCapType(new HandleRef(null, cap), out capType); 

            if (status != SafeNativeMethods.Gdip.Ok) 
            {
                SafeNativeMethods.Gdip.GdipDeleteCustomLineCap(new HandleRef(null, cap));
                throw SafeNativeMethods.Gdip.StatusException(status);
            } 

            switch (capType) 
            { 
            case CustomLineCapType.Default:
                return new CustomLineCap(cap); 

            case CustomLineCapType.AdjustableArrowCap:
                return new AdjustableArrowCap(cap);
            } 

            SafeNativeMethods.Gdip.GdipDeleteCustomLineCap(new HandleRef(null, cap)); 
            throw SafeNativeMethods.Gdip.StatusException(SafeNativeMethods.Gdip.NotImplemented); 
        }
 
        /// 
        /// 
        ///    Sets the caps used to start and end lines.
        ///  
        public void SetStrokeCaps(LineCap startCap, LineCap endCap)
        { 
            int status = SafeNativeMethods.Gdip.GdipSetCustomLineCapStrokeCaps(new HandleRef(this, nativeCap), startCap, endCap); 

            if (status != SafeNativeMethods.Gdip.Ok) 
                throw SafeNativeMethods.Gdip.StatusException(status);
        }

        ///  
        /// 
        ///    Gets the caps used to start and end lines. 
        ///  
        public void GetStrokeCaps(out LineCap startCap, out LineCap endCap)
        { 
            int status = SafeNativeMethods.Gdip.GdipGetCustomLineCapStrokeCaps(new HandleRef(this, nativeCap), out startCap, out endCap);

            if (status != SafeNativeMethods.Gdip.Ok)
                throw SafeNativeMethods.Gdip.StatusException(status); 
        }
 
        private void _SetStrokeJoin(LineJoin lineJoin) 
        {
            int status = SafeNativeMethods.Gdip.GdipSetCustomLineCapStrokeJoin(new HandleRef(this, nativeCap), lineJoin); 

            if (status != SafeNativeMethods.Gdip.Ok)
                throw SafeNativeMethods.Gdip.StatusException(status);
        } 

        private LineJoin _GetStrokeJoin() 
        { 
            LineJoin lineJoin;
 
            int status = SafeNativeMethods.Gdip.GdipGetCustomLineCapStrokeJoin(new HandleRef(this, nativeCap), out lineJoin);

            if (status != SafeNativeMethods.Gdip.Ok)
                throw SafeNativeMethods.Gdip.StatusException(status); 

            return lineJoin; 
        } 

        ///  
        /// 
        ///    Gets or sets the  used by this custom cap.
        /// 
        public LineJoin StrokeJoin 
        {
            get { return _GetStrokeJoin(); } 
            set { _SetStrokeJoin(value); } 
        }
 
        private void _SetBaseCap(LineCap baseCap)
        {
            int status = SafeNativeMethods.Gdip.GdipSetCustomLineCapBaseCap(new HandleRef(this, nativeCap), baseCap);
 
            if (status != SafeNativeMethods.Gdip.Ok)
                throw SafeNativeMethods.Gdip.StatusException(status); 
        } 

        private LineCap _GetBaseCap() 
        {
            LineCap baseCap;
            int status = SafeNativeMethods.Gdip.GdipGetCustomLineCapBaseCap(new HandleRef(this, nativeCap), out baseCap);
 
            if (status != SafeNativeMethods.Gdip.Ok)
                throw SafeNativeMethods.Gdip.StatusException(status); 
 
            return baseCap;
        } 

        /// 
        /// 
        ///    Gets or sets the  on which this  is based. 
        /// 
        public LineCap BaseCap 
        { 
            get { return _GetBaseCap(); }
            set { _SetBaseCap(value); } 
        }

        private void _SetBaseInset(float inset)
        { 
            int status = SafeNativeMethods.Gdip.GdipSetCustomLineCapBaseInset(new HandleRef(this, nativeCap), inset);
 
            if (status != SafeNativeMethods.Gdip.Ok) 
                throw SafeNativeMethods.Gdip.StatusException(status);
        } 

        private float _GetBaseInset()
        {
            float inset; 
            int status = SafeNativeMethods.Gdip.GdipGetCustomLineCapBaseInset(new HandleRef(this, nativeCap), out inset);
 
            if (status != SafeNativeMethods.Gdip.Ok) 
                throw SafeNativeMethods.Gdip.StatusException(status);
 
            return inset;
        }

        ///  
        /// 
        ///    Gets or sets the distance between the cap 
        ///    and the line. 
        /// 
        public float BaseInset 
        {
            get { return _GetBaseInset(); }
            set { _SetBaseInset(value); }
        } 

        private void _SetWidthScale(float widthScale) 
        { 
            int status = SafeNativeMethods.Gdip.GdipSetCustomLineCapWidthScale(new HandleRef(this, nativeCap), widthScale);
 
            if (status != SafeNativeMethods.Gdip.Ok)
                throw SafeNativeMethods.Gdip.StatusException(status);
        }
 
        private float _GetWidthScale()
        { 
            float widthScale; 
            int status = SafeNativeMethods.Gdip.GdipGetCustomLineCapWidthScale(new HandleRef(this, nativeCap), out widthScale);
 
            if (status != SafeNativeMethods.Gdip.Ok)
                throw SafeNativeMethods.Gdip.StatusException(status);

            return widthScale; 
        }
 
        ///  
        /// 
        ///    Gets or sets the amount by which to scale 
        ///    the width of the cap.
        /// 
        public float WidthScale
        { 
            get { return _GetWidthScale(); }
            set { _SetWidthScale(value); } 
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
                        

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