private void DrawNormalGridLayer(CALayer layer, bool isMajor)
{
if (isMajor && MajorGridLineInterval == 0)
{
return;
}
using (var path = CreatePath(isMajor ? MajorGridLineInterval : 0))
{
layer = new CAShapeLayer
{
LineWidth = isMajor ? (nfloat)MajorGridLineThickness : (nfloat)GridLineThickness,
Path = path.CGPath,
StrokeColor = isMajor ? MajorGridLineColor.ToCGColor() : GridLineColor.ToCGColor(),
Opacity = isMajor ? (float)MajorGridLineOpacity : (float)GridLineOpacity,
Frame = new CGRect(0, 0, Bounds.Size.Width, Bounds.Size.Height)
};
if (!MakeGridRainbows)
{
this.Layer.AddSublayer(layer);
}
else
{
var gradientLayer = new CAGradientLayer
{
StartPoint = new CGPoint(0.5, 0.0),
EndPoint = new CGPoint(0.5, 1.0),
Frame = new CGRect(0, 0, Bounds.Size.Width, Bounds.Size.Height),
Colors = rainbowColors,
Mask = layer
};
this.Layer.AddSublayer(gradientLayer);
}
}
}
private void DrawNormal(Canvas canvas, Paint majorPaint, Paint minorPaint)
{
majorPaint.StrokeWidth = MajorGridLineThickness;
majorPaint.Color = MajorGridLineColor.ToAndroid();
majorPaint.Alpha = (int)(255 * MajorGridLineOpacity);
minorPaint.StrokeWidth = GridLineThickness;
minorPaint.Color = GridLineColor.ToAndroid();
minorPaint.Alpha = (int)(255 * GridLineOpacity);
if (GridOrigin == DebugGridOrigin.TopLeft)
{
float verticalPosition = 0;
int i = 0;
while (verticalPosition <= screenHeight)
{
canvas.DrawLine(0, verticalPosition, screenWidth, verticalPosition, MajorGridLineInterval > 0 && i % MajorGridLineInterval == 0 ? majorPaint : minorPaint);
verticalPosition += VerticalItemSize;
i++;
}
float horizontalPosition = 0;
i = 0;
while (horizontalPosition <= screenWidth)
{
canvas.DrawLine(horizontalPosition, 0, horizontalPosition, screenHeight, MajorGridLineInterval > 0 && i % MajorGridLineInterval == 0 ? majorPaint : minorPaint);
horizontalPosition += HorizontalItemSize;
i++;
}
}
else if (GridOrigin == DebugGridOrigin.Center)
{
var gridLinesHorizontalCenter = screenWidth / 2;
var gridLinesVerticalCenter = screenHeight / 2;
var amountOfVerticalLines = screenWidth / HorizontalItemSize;
var amountOfHorizontalLines = screenHeight / VerticalItemSize;
// Draw the horizontal lines.
for (int i = 0; i < (amountOfHorizontalLines / 2); i++)
{
canvas.DrawLine(
startX: 0,
startY: gridLinesVerticalCenter + (i * VerticalItemSize),
stopX: screenWidth,
stopY: gridLinesVerticalCenter + (i * VerticalItemSize),
paint: MajorGridLineInterval > 0 && i % MajorGridLineInterval == 0 ? majorPaint : minorPaint
);
canvas.DrawLine(
startX: 0,
startY: gridLinesVerticalCenter - (i * VerticalItemSize),
stopX: screenWidth,
stopY: gridLinesVerticalCenter - (i * VerticalItemSize),
paint: MajorGridLineInterval > 0 && i % MajorGridLineInterval == 0 ? majorPaint : minorPaint
);
}
// Draw vertical lines.
for (int i = 0; i < (amountOfVerticalLines / 2); i++)
{
canvas.DrawLine(
startX: gridLinesHorizontalCenter + (i * HorizontalItemSize),
startY: 0,
stopX: gridLinesHorizontalCenter + (i * HorizontalItemSize),
stopY: screenHeight,
paint: MajorGridLineInterval > 0 && i % MajorGridLineInterval == 0 ? majorPaint : minorPaint
);
canvas.DrawLine(
startX: gridLinesHorizontalCenter - (i * HorizontalItemSize),
startY: 0,
stopX: gridLinesHorizontalCenter - (i * HorizontalItemSize),
stopY: screenHeight,
paint: MajorGridLineInterval > 0 && i % MajorGridLineInterval == 0 ? majorPaint : minorPaint
);
}
}
}