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| using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace MovableObject
{
public partial class Connector : UserControl
{
public Connector()
{
InitializeComponent();
this.SetStyle(ControlStyles.UserPaint |
ControlStyles.AllPaintingInWmPaint |
ControlStyles.OptimizedDoubleBuffer, true);
}
protected override void OnPaint(PaintEventArgs e)
{
Graphics canvas = e.Graphics;
//on clear le background
canvas.FillRectangle(Brushes.White, 0, 0, mW_f, mH_f);
//on trace la ligne horizontale
canvas.DrawLine(Pens.Black, 0, mH2_f, mW_f - mDb_f, mH2_f);
if (mMouseIsOnCircle_b)
{
canvas.FillEllipse(mOnMouseBrush,
mW_f - mDb_f, 0,
mDb_f - 1, mH_f - 1);
}
//on trace le cercle
canvas.DrawEllipse(Pens.Black,
mW_f - mDb_f, 0,
mDb_f - 1, mH_f - 1);
}
protected override void OnSizeChanged(EventArgs e)
{
mH_f = this.Height;
mW_f = this.Width;
mH2_f = this.Height/2;
mDb_f = mH_f;
this.Invalidate();
}
protected override void OnMouseMove(MouseEventArgs e)
{
if (e.X > mW_f - mDb_f)
{
mMouseIsOnCircle_b = true;
}
else
{
mMouseIsOnCircle_b = false;
}
this.Invalidate();
}
protected override void OnMouseLeave(EventArgs e)
{
mMouseIsOnCircle_b = false;
this.Invalidate();
}
[System.ComponentModel.DefaultValueAttribute(typeof(System.Drawing.Color),
"OnMouse Color"),
System.ComponentModel.CategoryAttribute("Appearance"),
System.ComponentModel.DescriptionAttribute("La couleur lorsque la souris est sur le cercle.")
]
public System.Drawing.Color OnMouseColor
{
get
{
return this.mOnMouseColor;
}
set
{
this.mOnMouseColor = value;
this.mOnMouseBrush = new SolidBrush(mOnMouseColor);
if (this.DesignMode == true)
{
this.Invalidate();
}
}
}
private float mH_f; //heigth
private float mW_f; //width
private float mDb_f; //big diameter
private float mDl_f; //little diameter
private float mH2_f; //half heigth
private bool mLinked_b = false; //linked?
private bool mMouseIsOnCircle_b = false;
private SolidBrush mOnMouseBrush = new SolidBrush(Color.Red);
private Color mOnMouseColor = Color.Red;
}
} |
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