private void DrawColorBoxes()
{
if (UseBitmapBuffer)
{
PaintBuffer.Clear();
}
else
{
PaintBitmap.Lock();
PaintBitmap.Clear();
}
int step = PaintBuffer.Size.Height / _colors.Length;
// draw color boxes on left side of bitmap
for (int i = 0; i < _colors.Length; i++)
{
Color opaque = _colors[i];
Color translucent = Color.FromArgb(63, opaque.R, opaque.G, opaque.B);
// draw translucent variant to the right of opaque color
RectI opaqueBounds = new RectI(0, i * step, _opaqueWidth, step);
RectI translucentBounds = new RectI(
_opaqueWidth, i * step, _translucentWidth - _opaqueWidth, step);
if (UseBitmapBuffer)
{
PaintBuffer.Clear(opaqueBounds, opaque);
PaintBuffer.Clear(translucentBounds, translucent);
}
else
{
PaintBitmap.Clear(opaqueBounds, opaque);
PaintBitmap.Clear(translucentBounds, translucent);
}
}
if (UseBitmapBuffer)
{
PaintBuffer.Write();
}
else
{
PaintBitmap.Unlock();
}
}
private void DrawOnBitmap(MouseEventArgs args, PointI p)
{
RectI bounds = RectI.Empty;
if (!UseBitmapBuffer)
{
PaintBitmap.Lock();
}
if (args.LeftButton == MouseButtonState.Pressed)
{
bounds = new RectI(p.X, p.Y, 1, 1);
DrawPixel(p.X, p.Y, PaintColor);
}
else if (args.RightButton == MouseButtonState.Pressed)
{
const int r = 4;
// define rectangle around cursor position
int x0 = Math.Max(_translucentWidth, p.X - r), y0 = Math.Max(0, p.Y - r),
x1 = Math.Min(PaintBuffer.Size.Width - 1, p.X + r),
y1 = Math.Min(PaintBuffer.Size.Height - 1, p.Y + r);
bounds = new RectI(x0, y0, x1 - x0 + 1, y1 - y0 + 1);
for (int x = x0; x <= x1; x++)
{
for (int y = y0; y <= y1; y++)
{
DrawPixel(x, y, PaintColor);
}
}
}
if (UseBitmapBuffer)
{
PaintBuffer.Write(bounds);
}
else
{
PaintBitmap.Unlock();
}
}