//============== return value ===============//
//
// -1
// 9 9
// ┌───────────────────────┐
// │ 1 8 4 │
// │ │
// -1 │ 5 0 7 │ -1
// │ │
// │ 2 6 3 │
// └───────────────────────┘
// 9 9
// -1
//
//
// Anchor Point : 10
//============================================//
public int partOfSelection(float x, float y, out int cursor)
{
cursor = -1;
if (selectedItems.Count == 0)
{
return(-1);
}
if (selectedItems.Count > 1)
{
return(containsInSelection(x, y) ? 0 : 9);
}
TActor actor = selectedItems[0];
if (currentTool == TDocument.TOOL_PUZZLE && !actor.puzzle)
{
return(-1);
}
PointF screenPos = new PointF(x, y);
PointF logicalPos = currentTool != TDocument.TOOL_PUZZLE ? actor.screenToLogical(new PointF(x, y)) : actor.ownerScene().screenToLogical(new PointF(x, y));
RectangleF actorBound = actor.bound();
PointF anchorPosOnScreen = actor.logicalToScreen(new PointF(actorBound.Width * actor.anchor.X, actorBound.Height * actor.anchor.Y));
RectangleF bound;
if (currentTool == TDocument.TOOL_BOUNDING)
{
bound = actor.interactionBound;
}
else if (currentTool == TDocument.TOOL_PUZZLE)
{
bound = actor.puzzleArea;
}
else
{
bound = actorBound;
}
PointF[] boundOnScreen;
if (currentTool == TDocument.TOOL_BOUNDING)
{
boundOnScreen = actor.interactionBoundOnScreen();
}
else if (currentTool == TDocument.TOOL_PUZZLE)
{
boundOnScreen = actor.puzzleAreaOnScreen();
}
else
{
boundOnScreen = actor.boundOnScreen();
}
int ctrl_size = 6;
bool leftEdge = TUtil.distanceBetweenPointLine(screenPos, boundOnScreen[0], boundOnScreen[1]) <= ctrl_size;
bool bottomEdge = TUtil.distanceBetweenPointLine(screenPos, boundOnScreen[1], boundOnScreen[2]) <= ctrl_size;
bool rightEdge = TUtil.distanceBetweenPointLine(screenPos, boundOnScreen[2], boundOnScreen[3]) <= ctrl_size;
bool topEdge = TUtil.distanceBetweenPointLine(screenPos, boundOnScreen[3], boundOnScreen[0]) <= ctrl_size;
bool insideBound = bound.Contains(logicalPos);
int first_cursor = 0; // cursor form part 5
double angle = -Math.Atan2(boundOnScreen[1].Y - boundOnScreen[0].Y, boundOnScreen[1].X - boundOnScreen[0].X) * 180 / Math.PI;
if (angle < 0)
{
angle += 360;
}
first_cursor = (int)((angle + 22.5) / 45) % 4;
int part = -1;
if (leftEdge && topEdge)
{
part = 1; cursor = (first_cursor - 1) % 4;
}
else if (leftEdge && bottomEdge)
{
part = 2; cursor = (first_cursor + 1) % 4;
}
else if (rightEdge && bottomEdge)
{
part = 3; cursor = (first_cursor + 3) % 4;
}
else if (rightEdge && topEdge)
{
part = 4; cursor = (first_cursor + 5) % 4;
}
else if (leftEdge && TUtil.isPointProjectionInLineSegment(screenPos, boundOnScreen[0], boundOnScreen[1]))
{
part = 5; cursor = (first_cursor + 0) % 4;
}
else if (bottomEdge && TUtil.isPointProjectionInLineSegment(screenPos, boundOnScreen[1], boundOnScreen[2]))
{
part = 6; cursor = (first_cursor + 2) % 4;
}
else if (rightEdge && TUtil.isPointProjectionInLineSegment(screenPos, boundOnScreen[2], boundOnScreen[3]))
{
part = 7; cursor = (first_cursor + 4) % 4;
}
else if (topEdge && TUtil.isPointProjectionInLineSegment(screenPos, boundOnScreen[3], boundOnScreen[0]))
{
part = 8; cursor = (first_cursor + 6) % 4;
}
else if (TUtil.distanceBetweenPoints(screenPos, anchorPosOnScreen) <= ctrl_size)
{
part = 10;
}
else if (insideBound)
{
part = 0;
}
else if (currentTool != TDocument.TOOL_BOUNDING && currentTool != TDocument.TOOL_PUZZLE)
{
if (TUtil.distanceBetweenPoints(screenPos, boundOnScreen[0]) <= ctrl_size * 3 ||
TUtil.distanceBetweenPoints(screenPos, boundOnScreen[1]) <= ctrl_size * 3 ||
TUtil.distanceBetweenPoints(screenPos, boundOnScreen[2]) <= ctrl_size * 3 ||
TUtil.distanceBetweenPoints(screenPos, boundOnScreen[3]) <= ctrl_size * 3)
{
part = 9;
}
}
return(part);
}
