//public static void FillRectangle(this CanvasDrawingSession session, Rect rect, Paint paint)
//{
//}
public static void DrawLines(this CanvasDrawingSession session, float[] points, int start, int length, Paint paint)
{
for (int i = start; i < length - 3; i += 4)
{
session.DrawLine(points[i], points[i + 1], points[i + 2], points[i + 3], paint.Color, paint.StrokeWidth);
}
}
protected override void drawChart(CanvasDrawingSession canvas)
{
if (chartData == null) return;
float fullWidth = (chartWidth / (pickerDelegate.pickerEnd - pickerDelegate.pickerStart));
float offset = fullWidth * (pickerDelegate.pickerStart) - HORIZONTAL_PADDING;
float p;
float lineWidth;
if (chartData.xPercentage.Length < 2)
{
p = 1f;
lineWidth = 1f;
}
else
{
p = chartData.xPercentage[1] * fullWidth;
lineWidth = chartData.xPercentage[1] * (fullWidth - p);
}
int additionalPoints = (int)(HORIZONTAL_PADDING / p) + 1;
int localStart = Math.Max(0, startXIndex - additionalPoints - 2);
int localEnd = Math.Min(chartData.xPercentage.Length - 1, endXIndex + additionalPoints + 2);
for (int k = 0; k < lines.Count; k++)
{
LineViewData line = lines[k];
line.linesPathBottomSize = 0;
}
float transitionAlpha = 1f;
//canvas.save();
if (transitionMode == TRANSITION_MODE_PARENT)
{
postTransition = true;
selectionA = 0f;
transitionAlpha = 1f - transitionParams.progress;
canvas.Transform = Matrix3x2.CreateScale(
new Vector2(1 + 2 * transitionParams.progress, 1f),
new Vector2(transitionParams.pX, transitionParams.pY)
);
}
else if (transitionMode == TRANSITION_MODE_CHILD)
{
transitionAlpha = transitionParams.progress;
canvas.Transform = Matrix3x2.CreateScale(
new Vector2(transitionParams.progress, 1f),
new Vector2(transitionParams.pX, transitionParams.pY)
);
}
else if (transitionMode == TRANSITION_MODE_ALPHA_ENTER)
{
transitionAlpha = transitionParams.progress;
}
bool selected = selectedIndex >= 0 && legendShowing;
for (int i = localStart; i <= localEnd; i++)
{
float stackOffset = 0;
if (selectedIndex == i && selected) continue;
for (int k = 0; k < lines.Count; k++)
{
LineViewData line = lines[k];
if (!line.enabled && line.alpha == 0) continue;
int[] y = line.line.y;
float xPoint = p / 2 + chartData.xPercentage[i] * (fullWidth - p) - offset;
float yPercentage = (float)y[i] / currentMaxHeight;
float height = (yPercentage) * (getMeasuredHeight() - chartBottom - SIGNATURE_TEXT_HEIGHT) * line.alpha;
float yPoint = getMeasuredHeight() - chartBottom - height;
line.linesPath[line.linesPathBottomSize++] = xPoint;
line.linesPath[line.linesPathBottomSize++] = yPoint - stackOffset;
line.linesPath[line.linesPathBottomSize++] = xPoint;
line.linesPath[line.linesPathBottomSize++] = getMeasuredHeight() - chartBottom - stackOffset;
stackOffset += height;
}
}
for (int k = 0; k < lines.Count; k++)
{
StackBarViewData line = lines[k];
Paint paint = selected || postTransition ? line.unselectedPaint : line.paint;
if (selected)
{
line.unselectedPaint.Color = Extensions.blendARGB(line.lineColor, line.blendColor, selectionA);
}
if (postTransition)
{
line.unselectedPaint.Color = Extensions.blendARGB(line.lineColor, line.blendColor, 1f);
}
paint.A = (byte)(255 * transitionAlpha);
paint.StrokeWidth = lineWidth;
canvas.DrawLines(line.linesPath, 0, line.linesPathBottomSize, paint);
}
if (selected)
{
float stackOffset = 0;
for (int k = 0; k < lines.Count; k++)
{
LineViewData line = lines[k];
if (!line.enabled && line.alpha == 0) continue;
int[] y = line.line.y;
float xPoint = p / 2 + chartData.xPercentage[selectedIndex] * (fullWidth - p) - offset;
float yPercentage = (float)y[selectedIndex] / currentMaxHeight;
float height = (yPercentage) * (getMeasuredHeight() - chartBottom - SIGNATURE_TEXT_HEIGHT) * line.alpha;
float yPoint = getMeasuredHeight() - chartBottom - height;
line.paint.StrokeWidth = lineWidth;
line.paint.A = (byte)(255 * transitionAlpha);
canvas.DrawLine(xPoint, yPoint - stackOffset,
xPoint, getMeasuredHeight() - chartBottom - stackOffset, line.paint);
stackOffset += height;
}
}
//canvas.restore();
}
public static void FillCircle(this CanvasDrawingSession session, float x, float y, Paint paint)
{
session.FillCircle(x, y, paint.StrokeWidth / 2, paint.Color);
}
public static void DrawGeometry(this CanvasDrawingSession session, CanvasGeometry geometry, Paint paint)
{
CanvasStrokeStyle strokeStyle = null;
if (paint.StrokeCap is CanvasCapStyle capStyle)
{
strokeStyle = new CanvasStrokeStyle();
strokeStyle.StartCap = capStyle;
strokeStyle.EndCap = capStyle;
strokeStyle.LineJoin = capStyle == CanvasCapStyle.Round ? CanvasLineJoin.Round : CanvasLineJoin.Miter;
}
session.DrawGeometry(geometry, paint.Color, paint.StrokeWidth, strokeStyle);
strokeStyle?.Dispose();
}
public static void DrawLine(this CanvasDrawingSession session, float x0, float y0, float x1, float y1, Paint paint)
{
CanvasStrokeStyle strokeStyle = null;
if (paint.StrokeCap is CanvasCapStyle capStyle)
{
strokeStyle = new CanvasStrokeStyle();
strokeStyle.StartCap = capStyle;
strokeStyle.EndCap = capStyle;
strokeStyle.LineJoin = capStyle == CanvasCapStyle.Round ? CanvasLineJoin.Round : CanvasLineJoin.Miter;
}
session.DrawLine(x0, y0, x1, y1, paint.Color, paint.StrokeWidth, strokeStyle);
strokeStyle?.Dispose();
}
public static void DrawText(this CanvasDrawingSession session, string text, float x, float y, Paint paint)
{
CanvasTextFormat textFormat = null;
if (paint.TextSize is float textSize)
{
textFormat = new CanvasTextFormat();
textFormat.FontSize = textSize;
}
if (paint.TextAlignment is CanvasHorizontalAlignment textAlignmnet)
{
textFormat = textFormat ?? new CanvasTextFormat();
textFormat.HorizontalAlignment = textAlignmnet;
}
session.DrawText(text, x, y, paint.Color, textFormat);
textFormat?.Dispose();
}
protected override void DrawChart(CanvasDrawingSession canvas)
{
if (chartData != null)
{
float fullWidth = chartWidth / (pickerDelegate.pickerEnd - pickerDelegate.pickerStart);
float offset = fullWidth * pickerDelegate.pickerStart - HORIZONTAL_PADDING;
int start = startXIndex - 1;
if (start < 0)
{
start = 0;
}
int end = endXIndex + 1;
if (end > chartData.lines[0].y.Length - 1)
{
end = chartData.lines[0].y.Length - 1;
}
//canvas.save();
//canvas.clipRect(chartStart, 0, chartEnd, MeasuredHeight - chartBottom);
var transform = canvas.Transform;
var clip = canvas.CreateLayer(1, CreateRect(chartStart, 0, chartEnd, MeasuredHeight - chartBottom));
float transitionAlpha = 1f;
//canvas.save();
if (transitionMode == TRANSITION_MODE_PARENT)
{
postTransition = true;
selectionA = 0f;
transitionAlpha = 1f - transitionParams.progress;
canvas.Transform = Matrix3x2.CreateScale(
new Vector2(1 + 2 * transitionParams.progress, 1f),
new Vector2(transitionParams.pX, transitionParams.pY)
);
}
else if (transitionMode == TRANSITION_MODE_CHILD)
{
transitionAlpha = transitionParams.progress;
canvas.Transform = Matrix3x2.CreateScale(
new Vector2(transitionParams.progress, 1f),
new Vector2(transitionParams.pX, transitionParams.pY)
);
}
for (int k = 0; k < lines.Count; k++)
{
BarViewData line = lines[k];
if (!line.enabled && line.alpha == 0)
{
continue;
}
float p;
if (chartData.xPercentage.Length < 2)
{
p = 1f;
}
else
{
p = chartData.xPercentage[1] * fullWidth;
}
int[] y = line.line.y;
int j = 0;
float selectedX = 0f;
float selectedY = 0f;
bool selected = false;
float a = line.alpha;
for (int i = start; i <= end; i++)
{
float xPoint = p / 2 + chartData.xPercentage[i] * fullWidth - offset;
float yPercentage = y[i] / currentMaxHeight * a;
float yPoint = MeasuredHeight - chartBottom - yPercentage * (MeasuredHeight - chartBottom - SIGNATURE_TEXT_HEIGHT);
if (i == selectedIndex && legendShowing)
{
selected = true;
selectedX = xPoint;
selectedY = yPoint;
continue;
}
line.linesPath[j++] = xPoint;
line.linesPath[j++] = yPoint;
line.linesPath[j++] = xPoint;
line.linesPath[j++] = MeasuredHeight - chartBottom;
}
Paint paint = selected || postTransition ? line.unselectedPaint : line.paint;
paint.StrokeWidth = p;
//paint.setStrokeWidth(p);
if (selected)
{
line.unselectedPaint.Color = Extensions.blendARGB(
line.line.color, line.blendColor, 1f - selectionA);
}
if (postTransition)
{
line.unselectedPaint.Color = Extensions.blendARGB(
line.line.color, line.blendColor, 0);
}
paint.A = (byte)(transitionAlpha * 255);
//canvas.drawLines(line.linesPath, 0, j, paint);
canvas.DrawLines(line.linesPath, 0, j, paint);
if (selected)
{
//line.paint.setStrokeWidth(p);
line.paint.StrokeWidth = p;
line.paint.A = (byte)(transitionAlpha * 255);
//canvas.drawLine(selectedX, selectedY,
// selectedX, MeasuredHeight - chartBottom,
// line.paint
//);
canvas.DrawLine(selectedX, selectedY, selectedX, MeasuredHeight - chartBottom, line.paint);
line.paint.A = 255;
}
}
//canvas.restore();
//canvas.restore();
clip.Dispose();
canvas.Transform = transform;
}
}
