// scale the selected items the specified delta, parameters are based on real drawing canvas coordinates
public void scaleInteractionBound(int part, float dx, float dy, bool fixedRatio)
{
for (int i = 0; i < selectedItems.Count; i++)
{
TActor item = this.selectedItems[i];
TActor origin = item.backupActor;
PointF d = origin.screenVectorToLogical(new PointF(dx, dy));
RectangleF bound = origin.interactionBound;
if (fixedRatio)
{
float z;
if (part == 1)
{
z = Math.Max(-d.X / bound.Width, -d.Y / bound.Height);
d = new PointF(-z * bound.Width, -z * bound.Height);
}
else if (part == 2)
{
z = Math.Max(-d.X / bound.Width, d.Y / bound.Height);
d = new PointF(-z * bound.Width, z * bound.Height);
}
else if (part == 3)
{
z = Math.Max(d.X / bound.Width, d.Y / bound.Height);
d = new PointF(z * bound.Width, z * bound.Height);
}
else if (part == 4)
{
z = Math.Max(d.X / bound.Width, -d.Y / bound.Height);
d = new PointF(z * bound.Width, -z * bound.Height);
}
}
float x1 = bound.Left, y1 = bound.Top, x2 = bound.Right, y2 = bound.Bottom;
if (part == 1 || part == 2 || part == 5)
{
x1 += d.X;
}
if (part == 3 || part == 4 || part == 7)
{
x2 += d.X;
}
if (part == 1 || part == 4 || part == 8)
{
y1 += d.Y;
}
if (part == 2 || part == 3 || part == 6)
{
y2 += d.Y;
}
item.interactionBound = new RectangleF(x1, y1, x2 - x1, y2 - y1);
}
}
// scale the selected items the specified delta, parameters are based on real drawing canvas coordinates
public void scaleSelectedItems(int part, float dx, float dy, bool fixedRatio)
{
for (int i = 0; i < selectedItems.Count; i++)
{
TActor item = this.selectedItems[i];
TActor origin = item.backupActor;
PointF d = origin.screenVectorToLogical(new PointF(dx, dy));
float sx = origin.scale.Width, sy = origin.scale.Height;
RectangleF bound = origin.bound();
float px = origin.anchor.X * bound.Width, py = origin.anchor.Y * bound.Height;
if (fixedRatio)
{
float w = bound.Width * sx, h = bound.Height * sy;
float z;
if (part == 1)
{
z = Math.Max(-d.X / w, -d.Y / h);
d = new PointF(-z * w, -z * h);
}
else if (part == 2)
{
z = Math.Max(-d.X / w, d.Y / h);
d = new PointF(-z * w, z * h);
}
else if (part == 3)
{
z = Math.Max(d.X / w, d.Y / h);
d = new PointF(z * w, z * h);
}
else if (part == 4)
{
z = Math.Max(d.X / w, -d.Y / h);
d = new PointF(z * w, -z * h);
}
}
if (part == 1 || part == 2 || part == 5)
{
sx -= sx * d.X / bound.Width;
px = d.X + (bound.Width - d.X) * origin.anchor.X;
}
if (part == 3 || part == 4 || part == 7)
{
sx += sx * d.X / bound.Width;
px = origin.anchor.X * (bound.Width + d.X);
}
if (part == 1 || part == 4 || part == 8)
{
sy -= sy * d.Y / bound.Height;
py = d.Y + (bound.Height - d.Y) * origin.anchor.Y;
}
if (part == 2 || part == 3 || part == 6)
{
sy += sy * d.Y / bound.Height;
py = origin.anchor.Y * (bound.Height + d.Y);
}
PointF[] p0 = { new PointF(px, py) };
origin.matrix.TransformPoints(p0);
item.position = p0[0];
item.scale = new SizeF(sx, sy);
// PointF p0 = item.logicalToScreen(new PointF(px, py));
// item.position = item.parent.screenToLogical(p0);
// item.scale = new SizeF(sx, sy);
}
}
