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Pen.cs
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Pen.cs
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//
// Pen.cs: The Pen code
//
// Authors:
// Miguel de Icaza (miguel@xamarin.com)
//
// Copyright 2011-2013 Xamarin Inc
//
using System;
using System.Drawing.Drawing2D;
using System.ComponentModel;
#if MONOMAC
using MonoMac.CoreGraphics;
#else
using MonoTouch.CoreGraphics;
#endif
namespace System.Drawing
{
public sealed partial class Pen : MarshalByRefObject, IDisposable, ICloneable
{
Brush brush;
Color color;
bool changed = true;
internal bool isModifiable;
float width;
public Pen (Brush brush) : this (brush, 1f)
{
}
public Pen (Color color) : this (color, 1f)
{
}
public Pen (Brush brush, float width)
{
if (brush == null)
throw new ArgumentNullException ("brush");
this.brush = (Brush)brush.Clone ();
var sb = brush as SolidBrush;
if (sb != null)
color = sb.Color;
else
color = Color.Black;
this.width = width;
}
public Pen (Color color, float width)
{
brush = new SolidBrush (color);
this.width = width;
}
public Brush Brush
{
get {
return brush;
}
set {
brush = (Brush)value.Clone ();
var sb = brush as SolidBrush;
if (sb != null)
color = sb.Color;
else
color = Color.Black;
changed = true;
}
}
public Color Color
{
get {
return color;
}
set {
if (value != color)
{
color = value;
brush = new SolidBrush (color);
changed = true;
}
}
}
~Pen ()
{
Dispose (false);
}
public void Dispose ()
{
Dispose (true);
}
public void Dispose (bool disposing)
{
if (disposing) {
}
}
public object Clone ()
{
if (brush != null)
return new Pen (brush, width);
else
return new Pen (color, width);
}
public float Width {
get {
return width;
}
set {
width = value;
changed = true;
}
}
Matrix transform;
public Matrix Transform {
get {
return transform;
}
set {
transform = value;
changed = true;
}
}
LineCap startCap = 0;
public LineCap StartCap {
get {
return (LineCap)startCap;
}
set {
if (Enum.IsDefined(typeof(LineCap), value)) {
startCap = value;
changed = true;
}
else
throw new InvalidEnumArgumentException ("value", (int)value, typeof(LineCap));
}
}
LineCap endCap = 0;
public LineCap EndCap {
get {
return (LineCap)startCap;
}
set {
if (Enum.IsDefined(typeof(LineCap), value)) {
endCap = value;
changed = true;
}
else
throw new InvalidEnumArgumentException ("value", (int)value, typeof(LineCap));
}
}
DashStyle dashStyle = 0;
public DashStyle DashStyle {
get {
return (DashStyle)dashStyle;
}
set {
if (Enum.IsDefined(typeof(DashStyle), value)) {
dashStyle = value;
changed = true;
}
else
throw new InvalidEnumArgumentException ("value", (int)value, typeof(DashStyle));
}
}
int dashOffset = 0;
public int DashOffset {
get {
return dashOffset;
}
set {
// fixme for error checking and range
dashOffset = value;
changed = true;
}
}
public void SetLineCap (LineCap startCap, LineCap endCap, DashCap dashCap)
{
StartCap = startCap;
}
LineJoin lineJoin = LineJoin.Miter;
public LineJoin LineJoin
{
get { return lineJoin; }
set {
lineJoin = value;
changed = true;
}
}
float miterLimit = 10f;
public float MiterLimit
{
get { return miterLimit; }
set {
miterLimit = value;
changed = true;
}
}
static float[] Dot = { 1.0f, 1.0f };
static float[] Dash = { 3.0f, 1.0f };
static float[] DashDot = { 3.0f, 1.0f, 1.0f, 1.0f };
static float[] DashDotDot = { 3.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f };
internal void Setup (Graphics graphics, bool fill)
{
CGContext context = graphics.context;
brush.Setup (graphics, fill);
// TODO: apply matrix
if (graphics.LastPen == this && !changed)
return;
// A Width of 0 will result in the Pen drawing as if the Width were 1.
width = width == 0 ? 1 : width;
//width = graphics.GraphicsUnitConvertFloat (width);
context.SetLineWidth (width);
switch (startCap)
{
case LineCap.Flat:
context.SetLineCap(CGLineCap.Butt);
break;
case LineCap.Square:
context.SetLineCap(CGLineCap.Square);
break;
case LineCap.Round:
context.SetLineCap(CGLineCap.Round);
break;
// case LineCap.Triangle:
// case LineCap.NoAnchor:
// case LineCap.SquareAnchor:
// case LineCap.RoundAnchor:
// case LineCap.DiamondAnchor:
// case LineCap.ArrowAnchor:
// case LineCap.AnchorMask:
// case LineCap.Custom:
default:
context.SetLineCap(CGLineCap.Butt);
break;
}
switch (dashStyle)
{
case DashStyle.Dash:
context.SetLineDash(dashOffset,setupMorseCode(Dash));
break;
case DashStyle.Dot:
context.SetLineDash(dashOffset,setupMorseCode(Dot));
break;
case DashStyle.DashDot:
context.SetLineDash(dashOffset,setupMorseCode(DashDot));
break;
case DashStyle.DashDotDot:
context.SetLineDash(dashOffset,setupMorseCode(DashDotDot));
break;
default:
context.SetLineDash(0, new float[0]);
break;
}
// miter limit
// join
// cap
// dashes
changed = false;
graphics.LastPen = this;
}
float[] setupMorseCode (float[] morse)
{
float[] dashdots = new float[morse.Length];
for (int x = 0; x < dashdots.Length; x++)
{
dashdots[x] = morse[x] * width;
}
return dashdots;
}
}
}