protected override void OnPaint(PaintEventArgs e)
{
e.Graphics.CompositingMode = CompositingMode.SourceOver;
int scaledSwatchSize = UI.ScaleWidth(this.unscaledSwatchSize);
int swatchColumns = this.ClientSize.Width / scaledSwatchSize;
Point mousePt = Control.MousePosition;
mousePt = PointToClient(mousePt);
int activeIndex = MouseXYToColorIndex(mousePt.X, mousePt.Y);
for (int i = 0; i < this.colors.Count; ++i)
{
ColorBgra c = this.colors[i];
int swatchX = i % swatchColumns;
int swatchY = i / swatchColumns;
Rectangle swatchRect = new Rectangle(
swatchX * scaledSwatchSize,
swatchY * scaledSwatchSize,
scaledSwatchSize,
scaledSwatchSize);
PushButtonState state;
if (this.mouseDown)
{
if (i == this.mouseDownIndex)
{
state = PushButtonState.Pressed;
}
else
{
state = PushButtonState.Normal;
}
}
else if (i == activeIndex)
{
state = PushButtonState.Hot;
}
else
{
state = PushButtonState.Normal;
}
bool drawOutline;
switch (state)
{
case PushButtonState.Hot:
drawOutline = true;
break;
case PushButtonState.Pressed:
drawOutline = false;
break;
case PushButtonState.Default:
case PushButtonState.Disabled:
case PushButtonState.Normal:
drawOutline = false;
break;
default:
throw new InvalidEnumArgumentException();
}
Utility.DrawColorRectangle(e.Graphics, swatchRect, c.ToColor(), drawOutline);
}
if (this.blinkHighlight)
{
int period = (Math.Abs(Environment.TickCount) / blinkInterval) % 2;
Color color;
switch (period)
{
case 0:
color = SystemColors.Window;
break;
case 1:
color = SystemColors.Highlight;
break;
default:
throw new InvalidOperationException();
}
using (Pen pen = new Pen(color))
{
e.Graphics.DrawRectangle(pen, new Rectangle(0, 0, Width - 1, Height - 1));
}
}
base.OnPaint(e);
}
