using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

class FillModesOddity : Form {
    public static void Main() {
        Application.Run(new FillModesOddity());
    }
    public FillModesOddity() {
        Text = "Alternate and Winding Fill Modes (An Oddity)";
        ClientSize = new Size(2 * ClientSize.Height, ClientSize.Height);
        ResizeRedraw = true;
    }
    protected override void OnPaint(PaintEventArgs pea) {
        DoPage(pea.Graphics, ForeColor, ClientSize.Width, ClientSize.Height);
    }
    protected void DoPage(Graphics grfx, Color clr, int cx, int cy) {
        Brush brush = new SolidBrush(clr);
        PointF[] aptf = { new PointF(100.1f, 400.7f), new PointF(400.5f, 10.7f),
                            new PointF(200.5f, 300.1f), new PointF(300.9f, 20.1f),
                            new PointF(300.9f, 200.5f), new PointF(300.3f, 390.5f),
                            new PointF(400.3f, 0.9f), new PointF(200.7f, 200.9f),
                            new PointF(500.7f, 100.3f), new PointF(100.1f, 400.3f)};
        grfx.FillPolygon(brush, aptf, FillMode.Alternate);
    }
}

    

   


using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

public class TestGDI4 : System.Windows.Forms.Form{
    
    //in order to paint something OnPaint method needs to be overridden
    
    protected override void OnPaint(System.Windows.Forms.PaintEventArgs pe) {
        //OnPaint method is a member of Form class 
        //The following call sends pe to an event listener Graphics
        base.OnPaint(pe);
        

        Graphics g = pe.Graphics ;
        Pen pn = new Pen( Color.Blue, 100 );
        Rectangle rect = new Rectangle(50, 50, 200, 100);
        g.DrawEllipse( pn, rect );         

    }
    public static void Main() {
        System.Windows.Forms.Application.Run(new TestGDI4());//display form
    }
}




           
          

   

using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

public class TryMouse : Form {
  private Region region; 
  private int oldX = 0;
  private int oldY = 0;

  public TryMouse() {
    Size = new Size(300,200);
    BackColor = Color.White;
    GraphicsPath p = new GraphicsPath();
    p.AddPolygon(new Point[]{new Point(50,10), new Point(10,50), new Point(150,100)});
    region = new Region(p);
  }

  protected override void OnPaint(PaintEventArgs e) {
    Graphics g = e.Graphics;
    g.FillRegion(Brushes.Red, region);
    base.OnPaint(e);
  }

  protected override void OnMouseDown(MouseEventArgs e) {
    if (region.GetBounds(CreateGraphics()).Contains(e.X, e.Y)){
      oldX = e.X;
      oldY = e.Y;
    }
    base.OnMouseDown(e);
  }

  protected override void OnMouseUp(MouseEventArgs e) {
    region.Translate(e.X-oldX, e.Y-oldY);
    oldX = e.X;
    oldY = e.Y;
    Invalidate();
    base.OnMouseUp(e);
  }
  public static void Main() {
    Application.Run(new TryMouse());
  }
}

           
          

   

/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury, 
   Zach Greenvoss, Shripad Kulkarni, Neil Whitlow

Publisher: Peer Information
ISBN: 1861007663
*/
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace Scribble
{
    /// <summary>
    /// Summary description for Form1.
    /// </summary>
    public class frmScribble : System.Windows.Forms.Form
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components = null;
        private bool mouseDown = false;
        private Point lastPoint = Point.Empty;
        private string color = "black";
      private Graphics g;
      private Pen p;

        public frmScribble()
        {
            //
            // Required for Windows Form Designer support
            //
            InitializeComponent();
         g = CreateGraphics();
         p = new Pen(Color.FromName(color));

            //
            // TODO: Add any constructor code after InitializeComponent call
            //
        }

        /// <summary>
        /// Clean up any resources being used.
        /// </summary>
        protected override void Dispose( bool disposing )
        {
         g.Dispose();
         if( disposing )
            {
                if (components != null) 
                {
                    components.Dispose();
                }
            }
            base.Dispose( disposing );
        }

        protected override void OnMouseDown(MouseEventArgs e)
        {
            mouseDown = true;
            if(e.Button==MouseButtons.Right)
            {
                ContextMenu m = new ContextMenu();
                m.MenuItems.Add(0, new MenuItem("black", new EventHandler(RightMouseButton_Click)));
                m.MenuItems.Add(1, new MenuItem("white", new EventHandler(RightMouseButton_Click)));
                m.MenuItems.Add(2, new MenuItem("red", new EventHandler(RightMouseButton_Click)));
                m.MenuItems.Add(3, new MenuItem("green", new EventHandler(RightMouseButton_Click)));
                m.MenuItems.Add(4, new MenuItem("blue", new EventHandler(RightMouseButton_Click)));
                m.Show(this, new Point(e.X, e.Y));
            }
        }

        protected void RightMouseButton_Click(object sender, EventArgs e)
        {
            color = ((MenuItem)sender).Text;
         p = new Pen(Color.FromName(color));
        }

        protected override void OnMouseUp(MouseEventArgs e)
        {
            mouseDown = false;
        }

        protected override void OnMouseMove(MouseEventArgs e)
        {
            if(lastPoint.Equals(Point.Empty)) lastPoint = new Point(e.X, e.Y);
            if(mouseDown) 
            {
                Point pMousePos = new Point(e.X, e.Y);
            g.DrawLine(p, pMousePos, lastPoint);
            }
            lastPoint = new Point(e.X, e.Y);
        }

        #region Windows Form Designer generated code
        /// <summary>
        /// Required method for Designer support - do not modify
        /// the contents of this method with the code editor.
        /// </summary>
        private void InitializeComponent()
        {
            // 
            // frmScribble
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(808, 542);
            this.MaximizeBox = false;
            this.Name = "frmScribble";
            this.Text = "Scribble";

        }
        #endregion

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main() 
        {
            Application.Run(new frmScribble());
        }
    }
}


           
          

/*
GDI+ Programming in C# and VB .NET
by Nick Symmonds

Publisher: Apress
ISBN: 159059035X
*/

using System;
using System.IO;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace CustomWindow {
///

public class CustomWindow1 : System.Windows.Forms.Form
{

private const int CLOSEDICON = 0;
private const int OPENICON = 1;
private const int DRAWICON = 2;
private const int DRAGICON = 3;

private ImageList mImageList;
private GraphicsPath mOriginalPath;
private GraphicsPath mSmoothPath;
private Point mStartPoint;
private Point mLastPoint;
private Rectangle mInvalidRect;
private Cursor mDrawCursor;
private Cursor mDragCursor;
private Icon mDrawIcon;
private string mRecallFileName;

private bool mAllowDrawing;
private bool mDrawing;
private bool mDraging;

private System.Windows.Forms.MainMenu mainMenu1;
private System.Windows.Forms.MenuItem menuItem1;
private System.Windows.Forms.MenuItem mnuExit;
private System.Windows.Forms.MenuItem menuItem3;
private System.Windows.Forms.MenuItem menuItem2;
private System.Windows.Forms.MenuItem menuItem7;
private System.Windows.Forms.RichTextBox DebugWindow;
private System.Windows.Forms.MenuItem mnuCreate;
private System.Windows.Forms.MenuItem mnuSmooth;
private System.Windows.Forms.MenuItem mnuSaveShape;
private System.Windows.Forms.MenuItem None;
private System.Windows.Forms.MenuItem mnuSpawnForm;
private System.Windows.Forms.MenuItem mnuSpawnSmooth;
private System.Windows.Forms.Splitter PanelSplitter;
private System.Windows.Forms.Panel BasePanel;
private System.Windows.Forms.Panel P1;
private System.Windows.Forms.TreeView PathTree;
private System.Windows.Forms.Splitter TreeSplitter;

private System.ComponentModel.Container components = null;

public CustomWindow1()
{
InitializeComponent();

//Initialize class variables
mDrawIcon = new Icon(“draw.ico”);
mDrawCursor = new Cursor(“Pen.cur”);
mDragCursor = new Cursor(“drag.cur”);
mImageList = new ImageList();
mOriginalPath = new GraphicsPath();
mSmoothPath = new GraphicsPath();
mDrawing = false;
mInvalidRect = Rectangle.Empty;

//Set the screen
this.Icon = mDrawIcon;
this.Size = new Size(800, 600);
this.SetStyle(ControlStyles.AllPaintingInWmPaint,true);
this.SetStyle(ControlStyles.DoubleBuffer,true);

//Set up the image list
mImageList.Images.Add(new Icon(“closed.ico”));
mImageList.Images.Add(new Icon(“open.ico”));
mImageList.Images.Add(mDrawIcon);
mImageList.Images.Add(new Icon(“drag.ico”));

//Set RichTextBox properties
DebugWindow.ReadOnly = true;
DebugWindow.Height = this.Height /8;
DebugWindow.Text = “”;

//Set up the splitters
PanelSplitter.Height = 3;
PanelSplitter.BackColor = Color.Blue;
TreeSplitter.BackColor = Color.Blue;
TreeSplitter.Location = new Point(PathTree.Width, 0);
TreeSplitter.Size = new Size(3, this.Height);

// Set properties of TreeView control.
PathTree.Width = this.ClientSize.Width / 6;
PathTree.TabIndex = 0;
PathTree.ImageList = mImageList;
PathTree.MouseDown += new MouseEventHandler(this.TreeMouseDown);
PathTree.MouseMove += new MouseEventHandler(this.TreeMouseMove);
PathTree.AfterCollapse += new TreeViewEventHandler(
this.TreeExpandCollapse);
PathTree.AfterExpand += new TreeViewEventHandler(
this.TreeExpandCollapse);

//Set Drawing Panel Properties
P1.BackColor = Color.Bisque;
P1.AllowDrop = true;
P1.DragEnter += new DragEventHandler(this.PanelDragEnter);
P1.DragDrop += new DragEventHandler(this.PanelDragDrop);
P1.Paint += new PaintEventHandler(this.PanelPaint);
P1.MouseDown += new MouseEventHandler(this.M_Down);
P1.MouseUp += new MouseEventHandler(this.M_Up);
P1.MouseMove += new MouseEventHandler(this.M_Move);

//Set all the border styles to none.
BasePanel.BorderStyle = BorderStyle.None;
P1.BorderStyle = BorderStyle.None;
PathTree.BorderStyle = BorderStyle.None;
DebugWindow.BorderStyle = BorderStyle.None;

//Disable some menu selections
mnuSpawnForm.Enabled = false;
mnuSpawnSmooth.Enabled = false;
}

protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
mOriginalPath.Dispose();
mSmoothPath.Dispose();
base.Dispose( disposing );
}

#region Windows Form Designer generated code
///

private void InitializeComponent()
{
this.mainMenu1 = new System.Windows.Forms.MainMenu();
this.menuItem1 = new System.Windows.Forms.MenuItem();
this.mnuExit = new System.Windows.Forms.MenuItem();
this.menuItem3 = new System.Windows.Forms.MenuItem();
this.mnuCreate = new System.Windows.Forms.MenuItem();
this.mnuSmooth = new System.Windows.Forms.MenuItem();
this.menuItem2 = new System.Windows.Forms.MenuItem();
this.mnuSaveShape = new System.Windows.Forms.MenuItem();
this.menuItem7 = new System.Windows.Forms.MenuItem();
this.None = new System.Windows.Forms.MenuItem();
this.mnuSpawnForm = new System.Windows.Forms.MenuItem();
this.mnuSpawnSmooth = new System.Windows.Forms.MenuItem();
this.DebugWindow = new System.Windows.Forms.RichTextBox();
this.PanelSplitter = new System.Windows.Forms.Splitter();
this.BasePanel = new System.Windows.Forms.Panel();
this.P1 = new System.Windows.Forms.Panel();
this.PathTree = new System.Windows.Forms.TreeView();
this.TreeSplitter = new System.Windows.Forms.Splitter();
this.BasePanel.SuspendLayout();
this.SuspendLayout();
//
// mainMenu1
//
this.mainMenu1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.menuItem1,
this.menuItem3,
this.menuItem7});
//
// menuItem1
//
this.menuItem1.Index = 0;
this.menuItem1.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.mnuExit});
this.menuItem1.Text = “&File”;
//
// mnuExit
//
this.mnuExit.Index = 0;
this.mnuExit.Text = “&Exit”;
this.mnuExit.Click += new System.EventHandler(this.mnuExit_Click);
//
// menuItem3
//
this.menuItem3.Index = 1;
this.menuItem3.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.mnuCreate,
this.mnuSmooth,
this.menuItem2,
this.mnuSaveShape});
this.menuItem3.Text = “&Shape”;
//
// mnuCreate
//
this.mnuCreate.Index = 0;
this.mnuCreate.Text = “Create”;
this.mnuCreate.Click += new System.EventHandler(this.mnuCreate_Click);
//
// mnuSmooth
//
this.mnuSmooth.Index = 1;
this.mnuSmooth.Text = “Smooth”;
this.mnuSmooth.Click += new System.EventHandler(this.mnuSmooth_Click);
//
// menuItem2
//
this.menuItem2.Index = 2;
this.menuItem2.Text = “-“;
//
// mnuSaveShape
//
this.mnuSaveShape.Index = 3;
this.mnuSaveShape.Text = “Save Shape”;
this.mnuSaveShape.Click += new System.EventHandler(this.mnuSaveShape_Click);
//
// menuItem7
//
this.menuItem7.Index = 2;
this.menuItem7.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.None});
this.menuItem7.Text = “&Form”;
//
// None
//
this.None.Index = 0;
this.None.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.mnuSpawnForm,
this.mnuSpawnSmooth});
this.None.Text = “Spawn”;
this.None.Click += new System.EventHandler(this.mnuSpawnForm_Click);
//
// mnuSpawnForm
//
this.mnuSpawnForm.Index = 0;
this.mnuSpawnForm.Text = “Original”;
this.mnuSpawnForm.Click += new System.EventHandler(this.mnuSpawnForm_Click);
//
// mnuSpawnSmooth
//
this.mnuSpawnSmooth.Index = 1;
this.mnuSpawnSmooth.Text = “Smooth”;
this.mnuSpawnSmooth.Click += new System.EventHandler(this.mnuSpawnSmooth_Click);
//
// DebugWindow
//
this.DebugWindow.Dock = System.Windows.Forms.DockStyle.Bottom;
this.DebugWindow.Location = new System.Drawing.Point(0, 321);
this.DebugWindow.Name = “DebugWindow”;
this.DebugWindow.Size = new System.Drawing.Size(536, 40);
this.DebugWindow.TabIndex = 3;
this.DebugWindow.Text = “”;
//
// PanelSplitter
//
this.PanelSplitter.Dock = System.Windows.Forms.DockStyle.Bottom;
this.PanelSplitter.Location = new System.Drawing.Point(0, 313);
this.PanelSplitter.Name = “PanelSplitter”;
this.PanelSplitter.Size = new System.Drawing.Size(536, 8);
this.PanelSplitter.TabIndex = 4;
this.PanelSplitter.TabStop = false;
//
// BasePanel
//
this.BasePanel.Controls.AddRange(new System.Windows.Forms.Control[] {
this.TreeSplitter,
this.P1,
this.PathTree});
this.BasePanel.Dock = System.Windows.Forms.DockStyle.Fill;
this.BasePanel.Name = “BasePanel”;
this.BasePanel.Size = new System.Drawing.Size(536, 313);
this.BasePanel.TabIndex = 5;
//
// P1
//
this.P1.Dock = System.Windows.Forms.DockStyle.Fill;
this.P1.Location = new System.Drawing.Point(88, 0);
this.P1.Name = “P1”;
this.P1.Size = new System.Drawing.Size(448, 313);
this.P1.TabIndex = 3;
//
// PathTree
//
this.PathTree.Dock = System.Windows.Forms.DockStyle.Left;
this.PathTree.ImageIndex = -1;
this.PathTree.Name = “PathTree”;
this.PathTree.SelectedImageIndex = -1;
this.PathTree.Size = new System.Drawing.Size(88, 313);
this.PathTree.TabIndex = 2;
//
// TreeSplitter
//
this.TreeSplitter.Location = new System.Drawing.Point(88, 0);
this.TreeSplitter.Name = “TreeSplitter”;
this.TreeSplitter.Size = new System.Drawing.Size(8, 313);
this.TreeSplitter.TabIndex = 4;
this.TreeSplitter.TabStop = false;
//
// CustomWindow
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(536, 361);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.BasePanel,
this.PanelSplitter,
this.DebugWindow});
this.Menu = this.mainMenu1;
this.Name = “CustomWindow”;
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = “Window Generator”;
this.Load += new System.EventHandler(this.CustomWindow_Load);
this.BasePanel.ResumeLayout(false);
this.ResumeLayout(false);

}
#endregion

#region Main Entry Point
///

[STAThread]
static void Main()
{
Application.Run(new CustomWindow1());
}
#endregion

private void CustomWindow_Load(object sender, System.EventArgs e)
{
FillTree();
}

private void PanelPaint(object sender, PaintEventArgs e)
{
PaintMe(e.Graphics);
}

private void PaintMe(Graphics G)
{
G.SmoothingMode = SmoothingMode.HighSpeed;

if (mOriginalPath.PointCount > 0)
G.DrawPath(Pens.Black, mOriginalPath);

if (mSmoothPath.PointCount > 0)
{
G.SmoothingMode = SmoothingMode.HighQuality;
G.DrawPath(Pens.Red, mSmoothPath);
}
}

#region Squeek events for Panel

private void M_Down(object sender, MouseEventArgs m)
{
if (mAllowDrawing && m.Button == MouseButtons.Left)
{
mStartPoint = new Point(m.X, m.Y);
mLastPoint = mStartPoint;
mOriginalPath = new GraphicsPath();
mDrawing = true;
DebugWindow.AppendText(“Starting Path
“);
DebugWindow.ScrollToCaret();
P1.Invalidate();
}
}

private void M_Up(object sender, MouseEventArgs m)
{
if (mDrawing)
{
mOriginalPath.CloseFigure();
mDrawing = false;
mAllowDrawing = false;
P1.Cursor = Cursors.Default;
if (mOriginalPath.PointCount > 2)
{
mnuSpawnForm.Enabled = true;
DebugWindow.AppendText(“Path Points: ” +
mOriginalPath.PointCount.ToString() + ”
“);
DebugWindow.AppendText(“Path Ended
“);
}
else
{
mnuSpawnForm.Enabled = false;
mnuSpawnSmooth.Enabled = false;
DebugWindow.SelectionColor = Color.Red;
DebugWindow.AppendText(“!!!INVALID PATH!!!
“);
DebugWindow.SelectionColor = Color.Black;
DebugWindow.AppendText(“Path Ended
“);
}

//Draw the paths and make a window.
P1.Invalidate();
}
}

private void M_Move(object sender, MouseEventArgs m)
{
if(mDrawing && m.Button == MouseButtons.Left)
{
mOriginalPath.AddLine(mLastPoint.X, mLastPoint.Y, m.X, m.Y);
mLastPoint.X = m.X;
mLastPoint.Y = m.Y;

mInvalidRect = Rectangle.Truncate(mOriginalPath.GetBounds());
mInvalidRect.Inflate( new Size(2, 2) );
P1.Invalidate(mInvalidRect);
}
}

#endregion

#region Drag-n-Drop events for TreeView and Panel

private void TreeMouseDown(object sender, MouseEventArgs m)
{
if (m.Button == MouseButtons.Left)
mDraging = true;
}

private void TreeMouseMove(object sender, MouseEventArgs m)
{
if (!mDraging)
return;

if (m.Button != MouseButtons.Left)
return;

//Initial condition
if (PathTree.SelectedNode == null)
return;

mRecallFileName = (string)PathTree.SelectedNode.Tag;

//Make sure that there is a filename associated with this node
if (mRecallFileName == string.Empty)
{
mDraging = false;
return;
}
DebugWindow.AppendText(“Dragging File: ” + mRecallFileName + ”
“);
PathTree.DoDragDrop(mRecallFileName ,
DragDropEffects.Copy | DragDropEffects.Move );
}

private void PanelDragEnter(object sender, DragEventArgs e)
{
if (e.Data.GetDataPresent(DataFormats.Text))
e.Effect = DragDropEffects.Copy;
else
e.Effect = DragDropEffects.None;
}

private void PanelDragDrop(object sender, DragEventArgs e)
{
mDraging = false;

mOriginalPath = WindowPath.GetPath(mRecallFileName);
mSmoothPath.Reset();
P1.Invalidate();

mnuSpawnSmooth.Enabled = false;
if (mOriginalPath.PointCount == 0)
DebugWindow.AppendText(“Empty Path File: ” + mRecallFileName + ”
“);
else
{
mnuSpawnForm.Enabled = true;
DebugWindow.AppendText(“Path Complete
“);
}
}

private void TreeExpandCollapse(object sender, TreeViewEventArgs e)
{
//No need to detect which node this is since only the base node can be
//expanded or contracted
if (e.Action == TreeViewAction.Collapse)
PathTree.Nodes[0].SelectedImageIndex = CLOSEDICON;
else
PathTree.Nodes[0].SelectedImageIndex = OPENICON;
}

#endregion

#region Menu functions

private void mnuExit_Click(object sender, System.EventArgs e)
{
this.Close();
}

private void mnuSmooth_Click(object sender, System.EventArgs e)
{
//Smooth out the path by reducing lines that make up path
mSmoothPath = SmootherPath(mOriginalPath);

//Translate a little to the side and below
Matrix Q = new Matrix();
Q.Translate(5, 5);
mSmoothPath.Transform(Q);

//Enable the ability to create smooth forms
mnuSpawnSmooth.Enabled = true;

P1.Invalidate();
DebugWindow.AppendText(“Original Path Points: ” +
mOriginalPath.PointCount.ToString() + ”
“);
DebugWindow.SelectionColor = Color.Red;
DebugWindow.AppendText(“Smooth Path Points: ” +
mSmoothPath.PointCount.ToString() + ”
“);
DebugWindow.SelectionColor = Color.Black;
}

private void mnuSpawnForm_Click(object sender, System.EventArgs e)
{
DebugWindow.AppendText(“Spawning Window based on original path
“);
MakeWindow(mOriginalPath);
}

private void mnuSpawnSmooth_Click(object sender, System.EventArgs e)
{
DebugWindow.AppendText(“Spawning Window based on smoothed path
“);
MakeWindow(mSmoothPath);
}

private void mnuCreate_Click(object sender, System.EventArgs e)
{
P1.Cursor = mDrawCursor;
mSmoothPath.Reset();
mOriginalPath.Reset();

mnuSpawnForm.Enabled = false;
mnuSpawnSmooth.Enabled = false;
mAllowDrawing = true;
P1.Invalidate();
}

private void mnuSaveShape_Click(object sender, System.EventArgs e)
{
SaveMe frm = new SaveMe(mOriginalPath);
frm.ShowDialog();
FillTree();
}

#endregion

#region Helper Functions

///
/// Start first with reducing the number of lines in this graphics path
/// 1. read first point
/// 2. if x value of next point = x value of last point then skip
/// 3. if x value of next point != value of last point then…
/// 3a. make line based on these two points
/// 3b. add line to new path
/// 3c. first point = next point
/// 4. repeat 1-3c
/// 5. Repeat 1-4 for both X and Y
///
private GraphicsPath SmootherPath(GraphicsPath gp)
{
PathData pd = gp.PathData;
PointF pt1 = new Point(-1, -1);

//First do all values in the X range
GraphicsPath FixedPath_X = new GraphicsPath();
foreach (PointF p in pd.Points)
{
if (pt1.X == -1)
{
pt1 = p;
continue;
}
// If I introduced an error factor here I could smooth it out even more
if (p.X != pt1.X)
{
FixedPath_X.AddLine(pt1, p);
pt1 = p;
}
}
FixedPath_X.CloseFigure();

//Second do all values in the Y range
pd = FixedPath_X.PathData;
pt1 = new Point(-1, -1);
GraphicsPath FixedPath_Y = new GraphicsPath();
foreach (PointF p in pd.Points)
{
if (pt1.Y == -1)
{
pt1 = p;
continue;
}
// If I introduced an error factor here I could smooth it out even more
if (p.Y != pt1.Y)
{
FixedPath_Y.AddLine(pt1, p);
pt1 = p;
}
}
FixedPath_Y.CloseFigure();

return FixedPath_Y;
}

private void MakeWindow(GraphicsPath ArgPath)
{
Form frm = new Form();
GraphicsPath path = (GraphicsPath)ArgPath.Clone();
Matrix Xlate = new Matrix();

//Find the lowest Y value and normalize all Y values to zero
//Find the lowest X value and normalize all X values to zero
//Doing this always gives me some part of a title bar
PointF[] p = path.PathPoints;
int Xoffset = 9999;
int Yoffset = 9999;
foreach (PointF p2 in p)
{
if (p2.X < Xoffset) Xoffset = (int)p2.X; if (p2.Y < Yoffset) Yoffset = (int)p2.Y; } Xlate.Translate(-Xoffset, -Yoffset); path.Transform(Xlate); // Set the paractical viewing region of the form frm.Region = new Region(path); //Set the size of the form Rectangle frmRect = Rectangle.Truncate(path.GetBounds()); frm.Size = frmRect.Size; //Set some other parameters frm.StartPosition = FormStartPosition.CenterParent; frm.FormBorderStyle = FormBorderStyle.FixedSingle; //Show as modal because the form will be disposed of //This is, after all, just and example frm.ShowDialog(); frm.Dispose(); Xlate.Dispose(); } private void FillTree() { TreeNode BaseNode; TreeNode NodeX; string[] AllFileNames = WindowPath.GraphicsPathFileNames; PathTree.Nodes.Clear(); //Create the base node BaseNode = new TreeNode("All Window Paths"); BaseNode.ImageIndex = OPENICON; BaseNode.SelectedImageIndex = BaseNode.ImageIndex; BaseNode.ExpandAll(); BaseNode.Tag = string.Empty; //Create each node in the tree under the base node foreach (string s in AllFileNames) { NodeX = new TreeNode(); NodeX.ImageIndex = DRAWICON; NodeX.SelectedImageIndex = NodeX.ImageIndex; NodeX.Text = Path.GetFileNameWithoutExtension(s); NodeX.Tag = s; BaseNode.Nodes.Add(NodeX); } PathTree.Nodes.Add(BaseNode); } #endregion } public class SaveMe : System.Windows.Forms.Form { private GraphicsPath mPath; private System.Windows.Forms.Button cmdSave; private System.Windows.Forms.TextBox txtSave; private System.ComponentModel.Container components = null; public SaveMe(GraphicsPath p) { InitializeComponent(); mPath = p; this.txtSave.TabIndex = 0; this.cmdSave.TabIndex = 1; } protected override void Dispose( bool disposing ) { if( disposing ) { if(components != null) { components.Dispose(); } } base.Dispose( disposing ); } #region Windows Form Designer generated code ///

private void InitializeComponent()
{
this.cmdSave = new System.Windows.Forms.Button();
this.txtSave = new System.Windows.Forms.TextBox();
this.SuspendLayout();
//
// cmdSave
//
this.cmdSave.Location = new System.Drawing.Point(112, 56);
this.cmdSave.Name = “cmdSave”;
this.cmdSave.Size = new System.Drawing.Size(72, 32);
this.cmdSave.TabIndex = 0;
this.cmdSave.Text = “&Save”;
this.cmdSave.Click += new System.EventHandler(this.cmdSave_Click);
//
// txtSave
//
this.txtSave.Location = new System.Drawing.Point(8, 24);
this.txtSave.Name = “txtSave”;
this.txtSave.Size = new System.Drawing.Size(176, 20);
this.txtSave.TabIndex = 1;
this.txtSave.Text = “”;
//
// SaveMe
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(194, 95);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.txtSave,
this.cmdSave});
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
this.MaximizeBox = false;
this.MinimizeBox = false;
this.Name = “SaveMe”;
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = “Choose Saved File Name”;
this.Load += new System.EventHandler(this.SaveMe_Load);
this.ResumeLayout(false);

}
#endregion

private void SaveMe_Load(object sender, System.EventArgs e)
{
}

private void cmdSave_Click(object sender, System.EventArgs e)
{
if (txtSave.Text != string.Empty && mPath.PointCount !=0)
WindowPath.SavePath(txtSave.Text + “.pth”, mPath);

this.Close();
}
}

public sealed class WindowPath
{
private static GraphicsPath mP;
private static string[] mFileNames;
private static string mIOerror;

///

/// ///
public static GraphicsPath GetPath(string fname)
{
Point BeginP = Point.Empty;
Point EndP = Point.Empty;
Point P = Point.Empty;
string s;
string[] x;
mP = new GraphicsPath();

StreamReader sr = new StreamReader(fname);
sr.BaseStream.Seek(0, SeekOrigin.Begin);
while (sr.Peek() > -1)
{
s = sr.ReadLine();
x = s.Split(new Char[] {','});
P.X = Convert.ToInt32(x[0]);
P.Y = Convert.ToInt32(x[1]);

if (BeginP == Point.Empty)
{
BeginP = P;
continue;
}

EndP = P;
mP.AddLine( BeginP, EndP);
BeginP = EndP;
}
mP.CloseFigure();

return mP;
}

public static void SavePath(string fname, GraphicsPath P)
{
FileStream fs = new FileStream(fname, FileMode.Create);
StreamWriter sw = new StreamWriter(fs);
foreach (PointF p in P.PathPoints)
{
sw.Write(p.X.ToString() + “,” + p.Y.ToString() + ”
“);
}
sw.Close();
GetFileNames();
}

public static string[] GraphicsPathFileNames
{
get
{
GetFileNames();
return mFileNames;
}
}

public static string LastError
{
get {return mIOerror;}
}

private static void GetFileNames()
{
ArrayList a = new ArrayList();
mIOerror = “”;
try
{
mFileNames = Directory.GetFiles(Directory.GetCurrentDirectory());

//We are only interested in the graphics path filenames which end in .pth
for (int k=0; k

/*
User Interfaces in C#: Windows Forms and Custom Controls
by Matthew MacDonald

Publisher: Apress
ISBN: 1590590457
*/
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;

namespace GDI_Basics
{
///

public class DoubleBuffering : System.Windows.Forms.Form
{
internal System.Windows.Forms.CheckBox chkDoubleBuffer;
internal System.Windows.Forms.Timer tmrRefresh;
private System.ComponentModel.IContainer components;

public DoubleBuffering()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

//
// TODO: Add any constructor code after InitializeComponent call
//
}

///

protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}

#region Windows Form Designer generated code
///

private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
this.chkDoubleBuffer = new System.Windows.Forms.CheckBox();
this.tmrRefresh = new System.Windows.Forms.Timer(this.components);
this.SuspendLayout();
//
// chkDoubleBuffer
//
this.chkDoubleBuffer.BackColor = System.Drawing.Color.PaleTurquoise;
this.chkDoubleBuffer.Location = new System.Drawing.Point(8, 8);
this.chkDoubleBuffer.Name = “chkDoubleBuffer”;
this.chkDoubleBuffer.Size = new System.Drawing.Size(336, 16);
this.chkDoubleBuffer.TabIndex = 1;
this.chkDoubleBuffer.Text = “Use Double Buffering”;
//
// tmrRefresh
//
this.tmrRefresh.Interval = 10;
this.tmrRefresh.Tick += new System.EventHandler(this.tmrRefresh_Tick);
//
// DoubleBuffering
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 14);
this.ClientSize = new System.Drawing.Size(376, 294);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.chkDoubleBuffer});
this.Font = new System.Drawing.Font(“Tahoma”, 8.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
this.Name = “DoubleBuffering”;
this.Text = “DoubleBuffering”;
this.Load += new System.EventHandler(this.DoubleBuffering_Load);
this.Paint += new System.Windows.Forms.PaintEventHandler(this.DoubleBuffering_Paint);
this.ResumeLayout(false);

}
#endregion

private bool isShrinking = false;
private int extraSize = 0;

private void tmrRefresh_Tick(object sender, System.EventArgs e)
{
// Change the circle dimensions.

if (isShrinking)
{
extraSize–;
}
else
{
extraSize++;
}

// Change the sizing direction if needed.
if (extraSize > (this.Width – 150))
{
isShrinking = true;
}
else if (extraSize < 1) { isShrinking = false; } // Repaint the form. this.Invalidate(); } protected override void OnPaintBackground( System.Windows.Forms.PaintEventArgs pevent) { // Do nothing. } [STAThread] static void Main() { Application.Run(new DoubleBuffering()); } private void DoubleBuffering_Load(object sender, System.EventArgs e) { tmrRefresh.Start(); } private void DoubleBuffering_Paint(object sender, System.Windows.Forms.PaintEventArgs e) { Graphics g; Bitmap drawing = null; // Check if double buffering is needed, and assign the GDI+ context. if (chkDoubleBuffer.Checked) { drawing = new Bitmap(this.Width, this.Height, e.Graphics); g = Graphics.FromImage(drawing); } else { g = e.Graphics; } g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; // Draw a rectangle. Pen drawingPen = new Pen(Color.Black, 10); g.FillRectangle(Brushes.PaleTurquoise , new Rectangle(new Point(0, 0), this.ClientSize)); g.DrawEllipse(drawingPen, 50, 50, 50 + extraSize, 50 + extraSize); // If using double buffering, render the final image and dispose of it. if (chkDoubleBuffer.Checked) { e.Graphics.DrawImageUnscaled(drawing, 0, 0); g.Dispose(); } } } } [/csharp]

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

public class Form1 : System.Windows.Forms.Form {
private System.ComponentModel.Container components = null;

public Form1() {
InitializeComponent();
}

protected override void Dispose( bool disposing ) {
if( disposing ) {
if (components != null) {
components.Dispose();
}
}
base.Dispose( disposing );
}

private void InitializeComponent() {
this.components = new System.ComponentModel.Container();
this.Size = new System.Drawing.Size(300,300);
this.Text = “Form1”;
}

static void Main() {
Application.Run(new Form1());
}

protected override void OnPaint(PaintEventArgs e) {
Graphics displayGraphics = e.Graphics;
Random r = new Random();
Image i = new Bitmap(ClientRectangle.Width, ClientRectangle.Height);
Graphics g = Graphics.FromImage(i);

g.FillRectangle(Brushes.White, ClientRectangle);

for (int x = 0; x < ClientRectangle.Width; x++) { for (int y = 0; y < ClientRectangle.Height; y += 10) { Color c = Color.FromArgb (r.Next(25), r.Next(55), r.Next(5)); Pen p = new Pen(c, 1); g.DrawLine(p, new Point(ClientRectangle.Width/2, ClientRectangle.Height/2), new Point(x, y)); p.Dispose(); } } displayGraphics.DrawImage(i, ClientRectangle); i.Dispose(); } } [/csharp]