private IEnumerable <AxisIncrementToRender> GetLabels(GraphView graph, Rect bounds)
{
// if no labels
if (Increment == 0)
{
yield break;
}
int labels = 0;
int x = GetAxisXPosition(graph);
// remember screen space is top down so the lowest graph
// space value is at the bottom of the screen
var start = graph.ScreenToGraphSpace(x, bounds.Height - 1);
var end = graph.ScreenToGraphSpace(x, 0);
// don't draw labels below the minimum
if (Minimum.HasValue)
{
start.Y = Math.Max(start.Y, Minimum.Value);
}
var current = start;
var dontDrawBelowScreenY = bounds.Height - graph.MarginBottom;
while (current.Y < end.Y)
{
int screenY = graph.GraphSpaceToScreen(new PointF(current.X, current.Y)).Y;
// if the axis label is above the bottom margin (screen y starts at 0 at the top)
if (screenY < dontDrawBelowScreenY)
{
// Create the axis symbol
var toRender = new AxisIncrementToRender(Orientation, screenY, current.Y);
// and the label (if we are due one)
if (ShowLabelsEvery != 0)
{
// if this increment also needs a label
if (labels++ % ShowLabelsEvery == 0)
{
toRender.Text = LabelGetter(toRender);
}
;
}
// draw the axis symbol (and label if it has one)
yield return(toRender);
}
current.Y += Increment;
}
}
private IEnumerable <AxisIncrementToRender> GetLabels(GraphView graph, Rect bounds)
{
// if no labels
if (Increment == 0)
{
yield break;
}
int labels = 0;
int y = GetAxisYPosition(graph);
var start = graph.ScreenToGraphSpace(0, y);
var end = graph.ScreenToGraphSpace(bounds.Width, y);
// don't draw labels below the minimum
if (Minimum.HasValue)
{
start.X = Math.Max(start.X, Minimum.Value);
}
var current = start;
while (current.X < end.X)
{
int screenX = graph.GraphSpaceToScreen(new PointF(current.X, current.Y)).X;
// Ensure the axis point does not draw into the margin
if (screenX >= graph.MarginLeft)
{
// The increment we will render (normally a top T unicode symbol)
var toRender = new AxisIncrementToRender(Orientation, screenX, current.X);
// Not every increment has to have a label
if (ShowLabelsEvery != 0)
{
// if this increment does also needs a label
if (labels++ % ShowLabelsEvery == 0)
{
toRender.Text = LabelGetter(toRender);
}
;
}
// Label or no label definetly render it
yield return(toRender);
}
current.X += Increment;
}
}
private string DefaultLabelGetter(AxisIncrementToRender toRender)
{
return(toRender.Value.ToString("N0"));
}