/// <summary>
/// Indicate that a user control has ended a click-drag
/// </summary>
public void MouseUp(Point upLocation)
{
axes = AxesAfterMouse();
mouse.leftDown = new Point(0, 0);
mouse.rightDown = new Point(0, 0);
mouse.middleDown = new Point(0, 0);
}
public void Render(SKCanvas canvas, SKRect rect)
{
if (axes == null)
{
AutoAxis();
}
layout.Tighten(rect);
axes.SetRect(layout.data);
if (layout.display)
{
layout.RenderDebuggingGuides(canvas);
}
// update the scale, apply mouse adjustments, then update the scale again
PlotSettings.Axes axesAfterMouse = new PlotSettings.Axes(axes);
axesAfterMouse.PanPixels(mouse.leftDownDelta);
axesAfterMouse.ZoomPixels(mouse.rightDownDelta);
axesAfterMouse.SetRect(layout.data);
// draw inside a clipping rectangle
canvas.Save();
canvas.ClipRect(layout.data);
for (int i = 0; i < plottables.Count; i++)
{
plottables[i].Render(canvas, axesAfterMouse);
}
canvas.Restore();
axisLabels.Render(layout, canvas);
axisScales.Render(layout, axesAfterMouse, canvas);
}
public void AutoAxis(double marginX = .1, double marginY = .1)
{
if (axes == null)
{
axes = new PlotSettings.Axes();
}
if (plottables.Count > 0)
{
axes.Set(plottables[0].GetDataArea());
for (int i = 1; i < plottables.Count; i++)
{
axes.Expand(plottables[i].GetDataArea());
}
}
axes.Zoom(1 - marginX, 1 - marginY);
}
/// <summary>
/// Return a new Axes after mouse panning and zooming
/// </summary>
private PlotSettings.Axes AxesAfterMouse(RectangleF?renderArea = null)
{
if (renderArea is null)
{
renderArea = mouse.lastRenderArea;
}
else
{
mouse.lastRenderArea = (RectangleF)renderArea;
}
var axesAfterMouse = new PlotSettings.Axes(axes);
if (mouse.leftButtonIsDown)
{
axesAfterMouse.PanPixels(mouse.leftDelta);
}
if (mouse.rightButtonIsDown)
{
axesAfterMouse.ZoomPixels(mouse.rightDelta);
}
axesAfterMouse.SetDataRect((RectangleF)renderArea);
return(axesAfterMouse);
}
