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();
}
