Color Scroll Dialog Box
using System;
using System.Drawing;
using System.Windows.Forms;
class ColorScrollDialogBox: Form
{
Label[] alabelName = new Label[3];
Label[] alabelValue = new Label[3];
VScrollBar[] avscroll = new VScrollBar[3];
public event EventHandler Changed;
public ColorScrollDialogBox()
{
Color[] acolor = { Color.Red, Color.Green, Color.Blue };
for (int i = 0; i < 3; i++)
{
alabelName[i] = new Label();
alabelName[i].Parent = this;
alabelName[i].ForeColor = acolor[i];
alabelName[i].Text = "&" + acolor[i].ToKnownColor();
alabelName[i].TextAlign = ContentAlignment.MiddleCenter;
avscroll[i] = new VScrollBar();
avscroll[i].Parent = this;
avscroll[i].SmallChange = 1;
avscroll[i].LargeChange = 16;
avscroll[i].Minimum = 0;
avscroll[i].Maximum = 255 + avscroll[i].LargeChange - 1;
avscroll[i].ValueChanged += new EventHandler(ScrollOnValueChanged);
avscroll[i].TabStop = true;
alabelValue[i] = new Label();
alabelValue[i].Parent = this;
alabelValue[i].TextAlign = ContentAlignment.MiddleCenter;
}
OnResize(EventArgs.Empty);
}
public Color Color
{
get
{
return Color.FromArgb(avscroll[0].Value,
avscroll[1].Value,
avscroll[2].Value);
}
set
{
avscroll[0].Value = value.R;
avscroll[1].Value = value.G;
avscroll[2].Value = value.B;
}
}
protected override void OnResize(EventArgs ea)
{
base.OnResize(ea);
int cx = ClientSize.Width;
int cy = ClientSize.Height;
int cyFont = Font.Height;
for (int i = 0; i < 3; i++)
{
alabelName[i].Location = new Point(i * cx / 3, cyFont / 2);
alabelName[i].Size = new Size(cx / 3, cyFont);
avscroll[i].Location = new Point((4 * i + 1) * cx / 12,2 * cyFont);
avscroll[i].Size = new Size(cx / 6, cy - 4 * cyFont);
alabelValue[i].Location = new Point(i * cx / 3,cy - 3 * cyFont / 2);
alabelValue[i].Size = new Size(cx / 3, cyFont);
}
}
void ScrollOnValueChanged(Object obj, EventArgs ea)
{
for (int i = 0; i < 3; i++)
if((VScrollBar) obj == avscroll[i])
alabelValue[i].Text = avscroll[i].Value.ToString();
if (Changed != null)
Changed(this, new EventArgs());
}
}
class ModelessColorScroll: Form
{
public static void Main()
{
Application.Run(new ModelessColorScroll());
}
public ModelessColorScroll()
{
ColorScrollDialogBox dlg = new ColorScrollDialogBox();
dlg.Owner = this;
dlg.Color = BackColor;
dlg.Changed += new EventHandler(ColorScrollOnChanged);
dlg.Show();
}
void ColorScrollOnChanged(object obj, EventArgs ea)
{
ColorScrollDialogBox dlg = (ColorScrollDialogBox) obj;
BackColor = dlg.Color;
}
}
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