// Handles motion (dx, dy) in screen space.
// The "edge" parameter specifies which edges the user is dragging.
public void HandleMotion(HitPosition edge, float dx, float dy)
{
var r = ComputeLayout();
switch (edge)
{
case HitPosition.None:
return;
case HitPosition.Move:
// Convert to image space before sending to moveBy().
MoveBy(dx * (_cropRect.Width() / r.Width()),
dy * (_cropRect.Height() / r.Height()));
break;
default:
if (!edge.HasFlag(HitPosition.GrowLeftEdge) && !edge.HasFlag(HitPosition.GrowRightEdge))
{
dx = 0;
}
if (!edge.HasFlag(HitPosition.GrowTopEdge) && !edge.HasFlag(HitPosition.GrowBottomEdge))
{
dy = 0;
}
// Convert to image space before sending to growBy().
var xDelta = dx * (_cropRect.Width() / r.Width());
var yDelta = dy * (_cropRect.Height() / r.Height());
GrowBy((edge.HasFlag(HitPosition.GrowLeftEdge) ? -1 : 1) * xDelta,
(edge.HasFlag(HitPosition.GrowTopEdge) ? -1 : 1) * yDelta);
break;
}
}
// Handles motion (dx, dy) in screen space.
// The "edge" parameter specifies which edges the user is dragging.
public void HandleMotion(HitPosition edge, float dx, float dy)
{
Rect r = computeLayout();
if (edge == HitPosition.None)
{
return;
}
else if (edge == HitPosition.Move)
{
// Convert to image space before sending to moveBy().
moveBy(dx * (cropRect.Width() / r.Width()),
dy * (cropRect.Height() / r.Height()));
}
else
{
if (!edge.HasFlag(HitPosition.GrowLeftEdge) && !edge.HasFlag(HitPosition.GrowRightEdge))
{
dx = 0;
}
if (!edge.HasFlag(HitPosition.GrowTopEdge) && !edge.HasFlag(HitPosition.GrowBottomEdge))
{
dy = 0;
}
// Convert to image space before sending to growBy().
float xDelta = dx * (cropRect.Width() / r.Width());
float yDelta = dy * (cropRect.Height() / r.Height());
growBy((edge.HasFlag(HitPosition.GrowLeftEdge) ? -1 : 1) * xDelta,
(edge.HasFlag(HitPosition.GrowTopEdge) ? -1 : 1) * yDelta);
}
}
// Handles motion (dx, dy) in screen space.
// The "edge" parameter specifies which edges the user is dragging.
public void HandleMotion(HitPosition edge, float dx, float dy)
{
Rect r = computeLayout();
if (edge == HitPosition.None)
{
return;
}
else if (edge == HitPosition.Move)
{
// Convert to image space before sending to moveBy().
moveBy(dx * (cropRect.Width() / r.Width()),
dy * (cropRect.Height() / r.Height()));
}
else
{
if (!edge.HasFlag(HitPosition.GrowLeftEdge) && !edge.HasFlag(HitPosition.GrowRightEdge))
{
dx = 0;
}
if (!edge.HasFlag(HitPosition.GrowTopEdge) && !edge.HasFlag(HitPosition.GrowBottomEdge))
{
dy = 0;
}
// Convert to image space before sending to growBy().
float xDelta = dx * (cropRect.Width() / r.Width());
float yDelta = dy * (cropRect.Height() / r.Height());
growBy((edge.HasFlag(HitPosition.GrowLeftEdge) ? -1 : 1) * xDelta,
(edge.HasFlag(HitPosition.GrowTopEdge) ? -1 : 1) * yDelta);
}
}