/// <summary>
/// Gets called whenever figures get added/removed from the figure collection.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void OnFigureListEntriesChanged(object sender, NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
foreach (var o in e.NewItems)
{
FigureAccess access = new FigureAccess(o, OnFigureValueChanged, easeInValue: true);
FigureAccesses.Add(access);
var entryAnimation = new Animation((v) => { access.Entrance = (float)v; Redraw(); }, 0, 1, Easing.CubicInOut);
entryAnimation.Commit(this, access.EntranceHandle, _animationFramerate, 500u);
}
break;
case NotifyCollectionChangedAction.Move:
break;
case NotifyCollectionChangedAction.Remove:
foreach (var o in e.OldItems)
{
var access = FigureAccesses[o];
if (access == null)
{
continue;
}
if (this.AnimationIsRunning(access.EntranceHandle))
{
this.AbortAnimation(access.EntranceHandle);
}
access.Unsubscribe();
var leaveAnimation = new Animation((v) => { access.Entrance = (float)v; Redraw(); }, access.Entrance, 0, Easing.CubicInOut);
leaveAnimation.Commit(this, access.EntranceHandle, _animationFramerate, 500u, finished: (v, c) => { FigureAccesses.Remove(o); Redraw(force: true); });
}
break;
case NotifyCollectionChangedAction.Replace:
break;
case NotifyCollectionChangedAction.Reset:
break;
default:
break;
}
}
protected override void DrawSpecific(SKCanvas canvas, int width, int height)
{
float widthCut = 0f;
float startPositionX = 0f;
float rotationPivotX = 0f;
float rotationPivotY = 0f;
switch (DescribtionPosition)
{
case DescribtionArea.Default:
widthCut = width - 2 * Padding;
rotationPivotX = width / 2;
rotationPivotY = height / 2;
break;
case DescribtionArea.LeftAndRight:
widthCut = width - 2 * Padding - 2 * DescribtionSpace;
startPositionX = DescribtionSpace;
rotationPivotX = width / 2;
rotationPivotY = height / 2;
break;
case DescribtionArea.Left:
widthCut = width - 2 * Padding - DescribtionSpace;
startPositionX = DescribtionSpace;
rotationPivotX = (widthCut / 2) + startPositionX;
rotationPivotY = height / 2;
break;
case DescribtionArea.Right:
widthCut = width - 2 * Padding - DescribtionSpace;
rotationPivotX = widthCut / 2;
rotationPivotY = height / 2;
break;
}
if (Rotation != 0)
{
canvas.RotateDegrees(Rotation, rotationPivotX, rotationPivotY);
}
//the sum of all values, adjusted by their animation
float maxValue = 0;
if (FigureAccesses == null || FigureAccesses.Count == 0)
{
return;
}
maxValue = FigureAccesses.Max(fig => fig.AnimatedValue);
//The starting position as portion of the full circle angle, going from 0 to 1
//Gets adjusted after every figure by the portion of the radius that figure demands
float position = 0;
float barWidth = widthCut / FigureAccesses.Count;
float barHeight;
foreach (FigureAccess figure in FigureAccesses)
{
if (BarOrientation == BarOrientation.Up || BarOrientation == BarOrientation.Down)
{
barHeight = (height - 2 * Padding) * (figure.AnimatedValue / maxValue);
}
else
{
barHeight = (widthCut) * (figure.AnimatedValue / maxValue);
barWidth = (height - 2 * Padding) / FigureAccesses.Count;
}
using (var paint = new SKPaint()
{
Color = figure.Color,
IsAntialias = IsAntiAliased,
Style = SKPaintStyle.Fill
})
{
switch (BarOrientation)
{
case BarOrientation.Up:
canvas.DrawRect(
x: startPositionX + Padding + BarPadding + position * barWidth,
y: height - Padding - barHeight,
w: barWidth - 2 * BarPadding,
h: barHeight,
paint: paint);
break;
case BarOrientation.Down:
canvas.DrawRect(
x: startPositionX + Padding + BarPadding + position * barWidth,
y: Padding,
w: barWidth - 2 * BarPadding,
h: barHeight,
paint: paint);
break;
case BarOrientation.Left:
canvas.DrawRect(
x: widthCut - Padding - barHeight,
y: Padding + position * barWidth,
w: barHeight,
h: barWidth - 2 * BarPadding,
paint: paint);
break;
case BarOrientation.Right:
canvas.DrawRect(
x: startPositionX + Padding,
y: Padding + position * barWidth,
w: barHeight,
h: barWidth - 2 * BarPadding,
paint: paint);
break;
default:
break;
}
}
//Increase the position for the next figure
position += 1;
}
}
protected override void DrawSpecific(SKCanvas canvas, int width, int height)
{
using (new SKAutoCanvasRestore(canvas))
{
float radius = 0f;
switch (DescribtionPosition)
{
case DescribtionArea.Default:
radius = Math.Min((width / 2f) - Padding, (height / 2f) - Padding);
canvas.Translate(width / 2, height / 2);
break;
case DescribtionArea.LeftAndRight:
radius = Math.Min((width / 2f) - Padding - DescribtionSpace, (height / 2f) - Padding);
canvas.Translate(width / 2, height / 2);
break;
case DescribtionArea.Left:
radius = Math.Min((width / 2f) - Padding - DescribtionSpace / 2f, (height / 2f) - Padding);
canvas.Translate(DescribtionSpace / 2f + (width / 2f), height / 2f);
break;
case DescribtionArea.Right:
radius = Math.Min((width / 2f) - Padding - DescribtionSpace / 2f, (height / 2f) - Padding);
canvas.Translate(-DescribtionSpace / 2f + (width / 2f), height / 2f);
break;
}
if (Rotation != 0)
{
canvas.RotateDegrees(Rotation);
}
//Create the inner and outer clip.
//If its a polygon
if (IsPolygon)
{
canvas.ClipPath(CircleMath.GetPolygonPath(InnerCirclePropoertionAnimated * radius, InnerCorners), SKClipOperation.Difference, antialias: IsAntiAliased);
canvas.ClipPath(CircleMath.GetPolygonPath(radius, OuterCorners), SKClipOperation.Intersect, antialias: IsAntiAliased);
}
//If its a circle
else
{
canvas.ClipPath(CircleMath.GetCirclePath(InnerCirclePropoertionAnimated * radius), SKClipOperation.Difference, antialias: IsAntiAliased);
canvas.ClipPath(CircleMath.GetCirclePath(radius), SKClipOperation.Intersect, antialias: IsAntiAliased);
}
//If there are no Figures, draw a placeholder and return
if (FigureAccesses == null || FigureAccesses.Count == 0)
{
using (var paint = new SKPaint()
{
Color = PlaceHolderColor,
IsAntialias = IsAntiAliased,
Style = SKPaintStyle.Fill
}) canvas.DrawPath(CircleMath.GetPiePath(radius, 0, CircleRadius), paint);
return;
}
//Draw the Pie pieces for every figure
//the sum of all values, adjusted by their animation
float valueSum = FigureAccesses.Sum(x => x.AnimatedValue);
//if the sum is 0, then the valuesum is set to 1 because the circle needs a valuesum > 0
if (valueSum == 0)
{
valueSum = Math.Max(valueSum, 1);
}
//The starting position as portion of the full circle angle, going from 0 to 1
//Gets adjusted after every figure by the portion of the radius that figure demands
float position = 0;
foreach (FigureAccess figure in FigureAccesses)
{
//Create The pie shaped path
float circlePortion = figure.AnimatedValue / valueSum;
SKPath path = CircleMath.GetPiePath
(
radius: radius,
fromRad: position * CircleRadius,
toRad: (position + circlePortion) * CircleRadius
);
//Draw the clipped pie shape
using (var paint = new SKPaint()
{
Color = figure.Color,
IsAntialias = IsAntiAliased,
Style = SKPaintStyle.Fill
}) canvas.DrawPath(path, paint);
//Increase the position for the next figure
position += circlePortion;
}
}
}
/// <summary>
/// Draw the describtions. So far, this is chart unspecific.
/// </summary>
protected void DrawValueLabels(SKCanvas canvas, int width, int height)
{
if (FigureAccesses == null || FigureAccesses.Count == 0)
{
return;
}
using (var describtionPaint = new SKPaint()
{
TextSize = 20f,
IsAntialias = IsAntiAliased,
Color = SKColors.Black,
IsStroke = false
})
{
//Calculating the maximum line height, that is then used for every line.
float maxDescribtionHeight = 0f;
foreach (FigureAccess fig in FigureAccesses)
{
if (!string.IsNullOrWhiteSpace(fig.Describtion))
{
var describtionBounds = new SKRect();
describtionPaint.MeasureText(fig.Describtion, ref describtionBounds);
maxDescribtionHeight = Math.Max(maxDescribtionHeight, describtionBounds.Height);
}
}
DrawDescribtionBackGround(canvas, width, height, maxDescribtionHeight, FigureAccesses.Count);
for (int i = 0; i < this.FigureAccesses.Count(); i++)
{
FigureAccess figure = FigureAccesses.ElementAt(i);
if (!string.IsNullOrEmpty(figure.Describtion))
{
var describtionBounds = new SKRect();
string text = figure.Describtion;
describtionPaint.MeasureText(text, ref describtionBounds);
maxDescribtionHeight = Math.Max(maxDescribtionHeight, describtionBounds.Height);
float xOffset = 0;
float yOffset = 0;
float xStep = 0;
float yStep = 0;
int adjustedIndex = i;
switch (DescribtionPosition)
{
case DescribtionArea.Default:
case DescribtionArea.LeftAndRight:
bool halfDone = i < (this.FigureAccesses.Count() + 1) / 2;
adjustedIndex = halfDone ? i : i - this.FigureAccesses.Count() % 2 - this.FigureAccesses.Count() / 2;
xOffset = halfDone ? width - Padding - DescribtionSpace + DescribtionPadding : +Padding + DescribtionPadding;
yOffset = halfDone ? Padding + DescribtionPadding : +Padding + DescribtionPadding + ((height - 2 * Padding) - Math.Min((this.FigureAccesses.Count() / 2) * maxDescribtionHeight * DescribtionSpacing + DescribtionPadding, height - 2 * Padding));
xStep = 0;
yStep = maxDescribtionHeight * DescribtionSpacing;
break;
case DescribtionArea.Right:
xOffset = width - Padding - DescribtionSpace + DescribtionPadding;
yOffset = Padding + DescribtionPadding;
xStep = 0;
yStep = maxDescribtionHeight * DescribtionSpacing;
break;
case DescribtionArea.Left:
xOffset = +Padding + DescribtionPadding;
yOffset = +Padding + DescribtionPadding;
xStep = 0;
yStep = maxDescribtionHeight * DescribtionSpacing;
break;
case DescribtionArea.Top:
break;
case DescribtionArea.Bottom:
break;
default:
break;
}
SKRect colorRect = SKRect.Create(
x: xOffset + xStep * adjustedIndex,
y: yOffset + yStep * adjustedIndex,
width: maxDescribtionHeight,
height: maxDescribtionHeight
);
using (var paint = new SKPaint()
{
IsAntialias = IsAntiAliased,
Color = figure.Color,
Style = SKPaintStyle.Fill
}) canvas.DrawRect(colorRect, paint);
canvas.DrawText(text,
x: colorRect.Right + 3f,
y: colorRect.Bottom,
paint: describtionPaint);
float valToShow = AnimateVisibleValues ? figure.AnimatedValue : figure.Value;
string valText = Math.Round(valToShow, FractionalDigits).ToString("n" + FractionalDigits);
canvas.DrawText(
text: valText,
x: colorRect.Right + describtionBounds.Width + 9f,
y: colorRect.Bottom,
paint: describtionPaint);
}
}
}
}