static bool HasCorner(GrabCorner c, GrabCorner f)
{
return (c & f) != GrabCorner.None;
}
void DrawHandles(ref Rect uiRect, ref GrabCorner dragging)
{
var nr = Normalize(uiRect);
foreach (var handle in grabHandles)
{
var r = handle.rect(nr);
// AddCursorRect requires positive height and width (from 'Normalize')
EditorGUIUtility.AddCursorRect(r, handle.cursor);
if (handle.cursor != MouseCursor.MoveArrow)
GUI.DrawTexture(r, handles);
// Start drag
if (Event.current.type == EventType.mouseDown && r.Contains(Event.current.mousePosition))
{
var d = handle.corners;
if (uiRect.width < 0f) // Invert X
{
if (HasCorner(d, GrabCorner.XMin) && !HasCorner(d, GrabCorner.XMax))
d = (d | GrabCorner.XMax) & ~GrabCorner.XMin;
else if (HasCorner(d, GrabCorner.XMax) && !HasCorner(d, GrabCorner.XMin))
d = (d | GrabCorner.XMin) & ~GrabCorner.XMax;
}
if (uiRect.height < 0f) // Invert Y
{
if (HasCorner(d, GrabCorner.YMin) && !HasCorner(d, GrabCorner.YMax))
d = (d | GrabCorner.YMax) & ~GrabCorner.YMin;
else if (HasCorner(d, GrabCorner.YMax) && !HasCorner(d, GrabCorner.YMin))
d = (d | GrabCorner.YMin) & ~GrabCorner.YMax;
}
dragging = d;
// Using RecordObject doesn't work fully here, for some reason
Undo.RegisterCompleteObjectUndo(this, "Drag font character");
}
}
if (dragging != GrabCorner.None)
{
// Move drag
if (Event.current.type == EventType.mouseDrag)
{
var d = dragging;
if (HasCorner(d, GrabCorner.XMin))
uiRect.xMin += Event.current.delta.x;
if (HasCorner(d, GrabCorner.XMax))
uiRect.xMax += Event.current.delta.x;
if (HasCorner(d, GrabCorner.YMin))
uiRect.yMin += Event.current.delta.y;
if (HasCorner(d, GrabCorner.YMax))
uiRect.yMax += Event.current.delta.y;
}
else if (Event.current.type == EventType.mouseUp)
{
// Stop drag
dragging = GrabCorner.None;
}
}
}