public void RenderPoint(Canvas canvas, DataPoint dataPoint)
{
RadRect slot = dataPoint.LayoutSlot;
Paint paint = this.CreatePaint(dataPoint);
canvas.DrawRect((float)slot.GetX(), (float)slot.GetY(), (float)slot.Right, (float)slot.Bottom, paint);
paint.Dispose();
}
private void RenderLabel(Canvas canvas, RadRect dataPointSlot, string labelText, StaticLayout textBounds)
{
// TODO - Rotate the canvas on the center before drawing label
//canvas.Rotate(90, (float)canvas.Width / 2, (float)canvas.Height / 2);
RectF labelBounds = new RectF();
float height = textBounds.Height + labelPadding * 2;
// Calculate the middle of the bar
var barY = (float)dataPointSlot.GetY();
var barHeight = canvas.Height - barY;
var middlePoint = barHeight / 2;
var labelY = canvas.Height - middlePoint;
// Calculate left and right padding around the label
var barX = (float)dataPointSlot.GetX();
var barRight = (float)dataPointSlot.Right;
var barWidth = barRight - barX;
var padding = barWidth / 10;
// Calculate the Rect bounds
var rectLeft = barX + padding;
var rectTop = labelY;
var rectRight = barRight - padding;
var rectBottom = rectTop + height;
// Set's the label's position on the Chart's canvas
labelBounds.Set(rectLeft, rectTop, rectRight, rectBottom);
// Draws Rect's fill and stroke color
canvas.DrawRect(labelBounds.Left, labelBounds.Top, labelBounds.Right, labelBounds.Bottom, fillPaint);
canvas.DrawRect(labelBounds.Left, labelBounds.Top, labelBounds.Right, labelBounds.Bottom, strokePaint);
// Draws the Text on the canvas
canvas.DrawText(
labelText,
(float)dataPointSlot.GetX() + (float)(dataPointSlot.Width / 2.0) - textBounds.GetLineWidth(0) / 2.0f,
labelBounds.CenterY() + textBounds.GetLineBottom(0) - textBounds.GetLineBaseline(0),
paint);
// TODO Undo rotation after drawing label
//canvas.Rotate(-90, (float)canvas.Width / 2, (float)canvas.Height / 2);
}
