// Calculate angle to rotate the cake orientation so that it aligns
// the selected emission icon on on the top arc of the cake.
// Sets the currently selected emission.
public float UpdateOrientation(IEmission Selected)
{
// Reset first (avoid accumulating huge sums in startAngle)
//InitializeCake();
bool add = false;
float newStartAngleOffset = 0;
// Calculate the amount to offset
foreach (PieceOfCake Slice in PiecesOfCake)
{
if (add)
{
newStartAngleOffset += Slice.ArcAngle;
}
if (Slice.Emission.Equals(Selected))
{
CurrentlySelected = Slice;
newStartAngleOffset += (Slice.ArcAngle / 2) - 90;
add = true;
}
}
OffsetDifference = newStartAngleOffset - OldOffset;
OldOffset = newStartAngleOffset;
return(OffsetDifference);
}
// Initialises a CakeView based on the given CarbonFootprint
// Rotation set to default origin values.
private void InitializeCake()
{
int i = 0;
float startAngle = 0;
foreach (IEmission Emission in CO2.Emissions)
{
float sweepAngle = 360f * (float)Emission.KgCO2 / TotalValues;
PiecesOfCake[i] = new PieceOfCake(Emission, Center, startAngle, sweepAngle, Radius, IconOffset, IconRadius);
startAngle += sweepAngle;
i++;
}
}
public CakeOrientation(CarbonFootprint co2, SKCanvasView canvasView)
{
this.CanvasView = canvasView;
this.Width = (float)canvasView.Width;
this.Height = (float)canvasView.Height;
this.CurrentlySelected = null;
this.Center = new SKPoint(Width / 2, Height / 2);
this.Thickness = Width / 10;
this.IconOffset = Width / 50;
this.IconRadius = Width / 12;
this.Radius = Math.Min(Width / 2, Height / 2) - 1.5f * Width / 12;
//System.Diagnostics.Debug.WriteLine("Width: " + size.Width);
this.TotalValues = 0;
this.CO2 = co2;
this.PopOver = new PopOver(Radius - Thickness * 1.3f, Width / 5, Width / 14, Width / 18);
this.BoldFont = new SKPaint
{
IsAntialias = true,
Style = SKPaintStyle.Fill,
TextAlign = SKTextAlign.Center,
Typeface = SKTypeface.FromFile("OpenSans-Bold.ttf")
};
this.NormalFont = new SKPaint
{
IsAntialias = true,
Style = SKPaintStyle.Fill,
TextAlign = SKTextAlign.Center,
Typeface = SKTypeface.FromFile("OpenSans-Normal.ttf")
};
foreach (IEmission Emission in CO2.Emissions)
{
TotalValues += (float)Emission.KgCO2;
}
PiecesOfCake = new PieceOfCake[co2.Emissions.Length];
InitializeCake();
}
public void SetOrientation(float offset)
{
for (int i = 0; i < PiecesOfCake.Length; i++)
{
IEmission emission = PiecesOfCake[i].Emission;
float startAngle = PiecesOfCake[i].StartAngle += offset;
float arcAngle = PiecesOfCake[i].ArcAngle;
float iconRadius = IconRadius;
float iconOffset = IconOffset;
bool isSelected = PiecesOfCake[i].Emission.Equals(CurrentlySelected);
// Make icon of selected category bigger
if (isSelected)
{
float factor = 1f;
iconRadius = IconRadius * factor;
//iconOffset = iconRadius / 2 + IconOffset;
}
PiecesOfCake[i] = new PieceOfCake(emission, Center, startAngle, arcAngle, Radius, iconOffset, iconRadius);
}
}
// Check if a touch event occured inside an icon and
// returns the corresponding piece of cake
public PieceOfCake SelectPieceOfCake(SKTouchEventArgs e)
{
SKPoint touchLocation = e.Location;
PieceOfCake SelectedSlice = null;
int i = 0;
foreach (PieceOfCake Slice in PiecesOfCake)
{
float minX = Slice.Icon.Center.X - Slice.Icon.Radius;
float maxX = Slice.Icon.Center.X + Slice.Icon.Radius;
float minY = Slice.Icon.Center.Y - Slice.Icon.Radius;
float maxY = Slice.Icon.Center.Y + Slice.Icon.Radius;
minX *= Scale;
maxX *= Scale;
minY *= Scale;
maxY *= Scale;
bool insideX = touchLocation.X > minX && touchLocation.X < maxX;
bool insideY = touchLocation.Y > minY && touchLocation.Y < maxY;
if (insideX && insideY)
{
SelectedSlice = Slice;
}
i++;
}
if (SelectedSlice != null)
{
CanvasView.InvalidateSurface();
}
return(SelectedSlice);
}
public void DrawPopover()
{
// Define paint
if (CakeOrientation.CurrentlySelected != null)
{
SKPaint fillPaint = new SKPaint
{
Color = SKColors.Transparent,
IsAntialias = true
};
PopOver popOver = CakeOrientation.PopOver;
PieceOfCake Slice = CakeOrientation.CurrentlySelected;
SKPath centerCircle = new SKPath();
fillPaint.Color = CakeOrientation.CurrentlySelected.Color;
fillPaint.ImageFilter = SKImageFilter.CreateDropShadow(1, 1, 20 * popOver.Factor, 20 * popOver.Factor, SKColors.Black.WithAlpha(80), SKDropShadowImageFilterShadowMode.DrawShadowAndForeground);
float radius = popOver.Radius * popOver.Factor;
float amountFontSize = popOver.AmountFontSize * popOver.Factor;
float unitFontSize = popOver.UnitFontSize * popOver.Factor;
float titleFontSize = popOver.TitleFontSize * popOver.Factor;
SKColor testColor = SKColors.White;
SKColor titleFontColor = testColor;
SKColor amountFontColor = testColor;
SKColor unitFontColor = testColor;
//connectRect.AddRect(rect);
centerCircle.AddCircle(CakeOrientation.Center.X, CakeOrientation.Center.Y, radius);
// Draw path
canvas.DrawPath(centerCircle, fillPaint);
// Define paint
SKPaint titlePaint = CakeOrientation.NormalFont;
titlePaint.Color = titleFontColor;
titlePaint.TextSize = titleFontSize;
SKPaint amountPaint = CakeOrientation.BoldFont;
amountPaint.Color = amountFontColor;
amountPaint.TextSize = amountFontSize;
SKPaint unitPaint = titlePaint;
SKPoint amountTextCenter = CakeOrientation.Center;
SKPoint titleTextCenter = CakeOrientation.Center;
SKPoint unitTextCenter = CakeOrientation.Center;
float amountTextHeight = amountFontSize / 0.75f;
float titleTextHeight = titleFontSize / 0.75f;
amountTextCenter.Y += amountFontSize / 2 * 0.75f;
titleTextCenter.Y -= (amountTextHeight / 2 - titleTextHeight / 2 + 5);
unitTextCenter.Y += (amountTextHeight / 2 + 5);
// Draw Text
canvas.DrawText(((int)Slice.Emission.KgCO2).ToString(), amountTextCenter, amountPaint);
canvas.DrawText(CakeUtil.GetTitle(Slice.Emission), titleTextCenter, titlePaint);
canvas.DrawText("kg CO2", unitTextCenter, unitPaint);
}
}
