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 DrawInverse(Canvas canvas, Paint majorPaint, global::Android.Graphics.Color[] colors)
{
majorPaint.StrokeWidth = 0;
majorPaint.Color = GridLineColor.ToAndroid();
majorPaint.Alpha = (int)(255 * GridLineOpacity);
if (GridOrigin == DebugGridOrigin.TopLeft)
{
var horizontalTotal = 0;
for (int i = 1; horizontalTotal < screenWidth; i++)
{
var verticalTotal = 0;
var horizontalSpacerSize = MajorGridLineInterval > 0 && i % MajorGridLineInterval == 0 ? MajorGridLineThickness : GridLineThickness;
for (int j = 1; verticalTotal < screenHeight; j++)
{
var verticalSpacerSize = MajorGridLineInterval > 0 && j % MajorGridLineInterval == 0 ? MajorGridLineThickness : GridLineThickness;
var rectangle = new Rect(
(int)horizontalTotal,
(int)verticalTotal,
(int)(horizontalTotal + HorizontalItemSize),
(int)(verticalTotal + VerticalItemSize)
);
if (MakeGridRainbows)
{
var color = colors[(i + j) % colors.Length];
majorPaint.Color = color;
}
canvas.DrawRect(rectangle, majorPaint);
verticalTotal += (int)(VerticalItemSize + verticalSpacerSize);
}
horizontalTotal += (int)(HorizontalItemSize + horizontalSpacerSize);
}
}
else if (GridOrigin == DebugGridOrigin.Center)
{
var horizontalRightTotal = (screenWidth / 2) + (int)((MajorGridLineInterval > 0 ? MajorGridLineThickness : GridLineThickness) / 2);
var horizontalLeftTotal = (screenWidth / 2) - (int)(HorizontalItemSize + ((MajorGridLineInterval > 0 ? MajorGridLineThickness : GridLineThickness) / 2));
for (int i = 1; horizontalRightTotal < screenWidth; i++)
{
var horizontalSpacerSize = MajorGridLineInterval > 0 && i % MajorGridLineInterval == 0 ? MajorGridLineThickness : GridLineThickness;
var verticalBottomTotal = (screenHeight / 2) + (int)((MajorGridLineInterval > 0 ? MajorGridLineThickness : GridLineThickness) / 2);
var verticalTopTotal = (screenHeight / 2) - (int)(VerticalItemSize + ((MajorGridLineInterval > 0 ? MajorGridLineThickness : GridLineThickness) / 2));
for (int j = 1; verticalBottomTotal < screenHeight; j++)
{
if (MakeGridRainbows)
{
var color = colors[(i + j) % colors.Length];
majorPaint.Color = color;
}
var verticalSpacerSize = MajorGridLineInterval > 0 && j % MajorGridLineInterval == 0 ? MajorGridLineThickness : GridLineThickness;
var rectangle = new Rect(horizontalRightTotal, verticalBottomTotal, (int)(horizontalRightTotal + HorizontalItemSize), (int)(verticalBottomTotal + VerticalItemSize));
canvas.DrawRect(rectangle, majorPaint);
var rectangle2 = new Rect(horizontalLeftTotal, verticalTopTotal, (int)(horizontalLeftTotal + HorizontalItemSize), (int)(verticalTopTotal + VerticalItemSize));
canvas.DrawRect(rectangle2, majorPaint);
var rectangle3 = new Rect(horizontalRightTotal, verticalTopTotal, (int)(horizontalRightTotal + HorizontalItemSize), (int)(verticalTopTotal + VerticalItemSize));
canvas.DrawRect(rectangle3, majorPaint);
var rectangle4 = new Rect(horizontalLeftTotal, verticalBottomTotal, (int)(horizontalLeftTotal + HorizontalItemSize), (int)(verticalBottomTotal + VerticalItemSize));
canvas.DrawRect(rectangle4, majorPaint);
verticalTopTotal -= (int)(VerticalItemSize + verticalSpacerSize);
verticalBottomTotal += (int)(VerticalItemSize + verticalSpacerSize);
}
horizontalRightTotal += (int)(HorizontalItemSize + horizontalSpacerSize);
horizontalLeftTotal -= (int)(HorizontalItemSize + horizontalSpacerSize);
}
}
}
private void DrawInverseGridLayer(CGRect rect)
{
var context = UIGraphics.GetCurrentContext();
context.SetFillColor(GridLineColor.ToCGColor());
context.SetAlpha((nfloat)GridLineOpacity);
if (GridOrigin == DebugGridOrigin.TopLeft)
{
var horizontalTotal = 0;
for (int i = 1; horizontalTotal < Bounds.Size.Width; i++)
{
var verticalTotal = 0;
var horizontalSpacerSize = MajorGridLineInterval > 0 && i % MajorGridLineInterval == 0 ? MajorGridLineThickness : GridLineThickness;
for (int j = 1; verticalTotal < Bounds.Size.Height; j++)
{
var verticalSpacerSize = MajorGridLineInterval > 0 && j % MajorGridLineInterval == 0 ? MajorGridLineThickness : GridLineThickness;
var rectangle = new CGRect(horizontalTotal, verticalTotal, HorizontalItemSize, VerticalItemSize);
if (MakeGridRainbows)
{
var color = rainbowColors[(i + j) % rainbowColors.Length];
context.SetFillColor(color);
}
context.FillRect(rectangle);
verticalTotal += (int)(VerticalItemSize + verticalSpacerSize);
}
horizontalTotal += (int)(HorizontalItemSize + horizontalSpacerSize);
}
}
else if (GridOrigin == DebugGridOrigin.Center)
{
var horizontalRightTotal = (Bounds.Size.Width / 2) + ((MajorGridLineInterval > 0 ? MajorGridLineThickness : GridLineThickness) / 2);
var horizontalLeftTotal = (Bounds.Size.Width / 2) - (int)(HorizontalItemSize + ((MajorGridLineInterval > 0 ? MajorGridLineThickness : GridLineThickness) / 2));
for (int i = 1; horizontalRightTotal < Bounds.Size.Width; i++)
{
var horizontalSpacerSize = MajorGridLineInterval > 0 && i % MajorGridLineInterval == 0 ? MajorGridLineThickness : GridLineThickness;
var verticalBottomTotal = (Bounds.Size.Height / 2) + ((MajorGridLineInterval > 0 ? MajorGridLineThickness : GridLineThickness) / 2);
var verticalTopTotal = (Bounds.Size.Height / 2) - (int)(VerticalItemSize + ((MajorGridLineInterval > 0 ? MajorGridLineThickness : GridLineThickness) / 2));
for (int j = 1; verticalBottomTotal < Bounds.Size.Height; j++)
{
if (MakeGridRainbows)
{
var color = rainbowColors[(i + j) % rainbowColors.Length];
context.SetFillColor(color);
}
var verticalSpacerSize = MajorGridLineInterval > 0 && j % MajorGridLineInterval == 0 ? MajorGridLineThickness : GridLineThickness;
var rectangle = new CGRect(horizontalRightTotal, verticalBottomTotal, HorizontalItemSize, VerticalItemSize);
context.FillRect(rectangle);
var rectangle2 = new CGRect(horizontalLeftTotal, verticalTopTotal, HorizontalItemSize, VerticalItemSize);
context.FillRect(rectangle2);
var rectangle3 = new CGRect(horizontalRightTotal, verticalTopTotal, HorizontalItemSize, VerticalItemSize);
context.FillRect(rectangle3);
var rectangle4 = new CGRect(horizontalLeftTotal, verticalBottomTotal, HorizontalItemSize, VerticalItemSize);
context.FillRect(rectangle4);
verticalTopTotal -= (int)(VerticalItemSize + verticalSpacerSize);
verticalBottomTotal += (int)(VerticalItemSize + verticalSpacerSize);
}
horizontalRightTotal += (int)(HorizontalItemSize + horizontalSpacerSize);
horizontalLeftTotal -= (int)(HorizontalItemSize + horizontalSpacerSize);
}
}
}
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
);
}
}
}