public string GetMyLastObjectID()
{
string objectID = null;
if (drawingCommands.Count > 0)
{
lock (drawingCommandLock)
{
for (int i = drawingCommands.Count - 1; i >= 0; i--)
{
if (drawingCommands[i] is LineObject)
{
LineObject drawingObject = (LineObject)drawingCommands[i];
string user_id;
if ((drawingObject.ObjectID != null) && (drawingObject.ObjectID.LastIndexOf('_') >= 0))
{
user_id = drawingObject.ObjectID.Substring(0, drawingObject.ObjectID.LastIndexOf('_'));
if (string.Compare(user_id, DDD_Global.Instance.PlayerID) == 0)
{
objectID = drawingObject.ObjectID;
break;
}
}
}
}
}
}
return(objectID);
}
public void DeleteSelectionObjects()
{
lock (drawingCommandLock)
{
foreach (Object command in drawingCommands)
{
if (command is LineObject)
{
LineObject lineObject = (LineObject)command;
if (lineObject.ObjectSelected)
{
lineObject.ObjectSelected = false;
// Determine if the user owns this object
if (!IsAllowedSelection(lineObject))
{
continue;
}
_Controller.WhiteboardUndoRequest(((LineObject)command).ObjectID, DDD_Global.Instance.PlayerID, Name);
}
}
}
numObjectsSelected = 0;
}
}
public bool Clear(string user_id)
{
lock (drawingCommandLock)
{
// Only clear this users drawing objects
for (int i = drawingCommands.Count - 1; i >= 0; i--)
{
if (drawingCommands[i] is LineObject)
{
LineObject drawingObject = (LineObject)drawingCommands[i];
string objectUserID;
if ((drawingObject.ObjectID != null) && (drawingObject.ObjectID.LastIndexOf('_') >= 0))
{
objectUserID = drawingObject.ObjectID.Substring(0, drawingObject.ObjectID.LastIndexOf('_'));
if (string.Compare(objectUserID, user_id) == 0)
{
// Clear this drawing object
drawingCommands.RemoveAt(i);
}
}
}
}
}
return(true);
}
private bool IsAllowedSelection(LineObject lineObject)
{
string user_id;
string objectID = lineObject.ObjectID;
if (IsRoomOwner)
{
return(true);
}
if (objectID.LastIndexOf('_') >= 0)
{
user_id = objectID.Substring(0, objectID.LastIndexOf('_'));
}
else
{
return(false);
}
return(string.Compare(user_id, DDD_Global.Instance.PlayerID) == 0);
}
public void AddSelection(RectangleF selectionRect, bool areaSelection)
{
Polygon selectionPolygon = null;
LineObject lineObject;
PolygonCollisionResult result;
LineObject prevSelectedObject = null;
// Create Selection Polygon
selectionPolygon = new Polygon();
selectionPolygon.Points.Add(new Vector(selectionRect.Left, selectionRect.Top));
selectionPolygon.Points.Add(new Vector(selectionRect.Right, selectionRect.Top));
selectionPolygon.Points.Add(new Vector(selectionRect.Right, selectionRect.Bottom));
selectionPolygon.Points.Add(new Vector(selectionRect.Left, selectionRect.Bottom));
selectionPolygon.Offset(0, 0);
selectionPolygon.BuildEdges();
if (areaSelection)
{
// Select an area of objects
lock (drawingCommandLock)
{
foreach (Object command in drawingCommands)
{
if (command is LineObject)
{
lineObject = command as LineObject;
if ((lineObject.BoundingPolygon != null) && (lineObject.Mode != DrawModes.Circle))
{
result = PolygonCollision(lineObject.BoundingPolygon, selectionPolygon, new Vector(0, 0));
if ((result.Intersect) && (IsAllowedSelection(lineObject)))
{
lineObject.ObjectSelected = true;
numObjectsSelected++;
}
}
else if (lineObject.Mode == DrawModes.Circle)
{
if ((CircleSelectedByRect(lineObject, selectionRect)) && (IsAllowedSelection(lineObject)))
{
lineObject.ObjectSelected = true;
numObjectsSelected++;
}
}
}
}
}
}
else
{
// Select a single object
if (numObjectsSelected > 1)
{
ClearSelectionList();
}
else if (numObjectsSelected == 1)
{
// Locate the previously selected object
lock (drawingCommandLock)
{
foreach (Object command in drawingCommands)
{
if ((command is LineObject) && ((LineObject)command).ObjectSelected)
{
prevSelectedObject = command as LineObject;
break;
}
}
}
}
LineObject selectedObject = null;
LineObject firstSelectedObject = null;
bool prevSelectionFound = false;
lock (drawingCommandLock)
{
foreach (Object command in drawingCommands)
{
if (command is LineObject)
{
bool objectSelected = false;
lineObject = command as LineObject;
if ((lineObject.BoundingPolygon != null) && (lineObject.Mode != DrawModes.Circle))
{
result = PolygonCollision(lineObject.BoundingPolygon, selectionPolygon, new Vector(0, 0));
if ((result.Intersect) && (IsAllowedSelection(lineObject)))
{
objectSelected = true;
}
}
else if (lineObject.Mode == DrawModes.Circle)
{
if ((CircleSelectedByRect(lineObject, selectionRect)) && (IsAllowedSelection(lineObject)))
{
objectSelected = true;
}
}
if (objectSelected)
{
if (firstSelectedObject == null)
{
firstSelectedObject = lineObject;
}
if ((prevSelectionFound) && (lineObject != prevSelectedObject))
{
selectedObject = lineObject;
break;
}
if (lineObject == prevSelectedObject)
{
selectedObject = lineObject;
prevSelectionFound = true;
}
}
}
}
}
if ((selectedObject == prevSelectedObject) || (selectedObject == null))
{
selectedObject = firstSelectedObject;
}
ClearSelectionList();
if ((selectedObject != null) && (IsAllowedSelection(selectedObject)))
{
selectedObject.ObjectSelected = true;
numObjectsSelected++;
}
}
}
public bool AddLine(string objectID, DrawModes mode, LocationValue start, LocationValue end, double width, double oringinalScale, int color, string text)
{
LineObject line = new LineObject();
line.Mode = mode;
line.Start = start;
line.End = end;
line.Width = width;
line.OriginalScale = oringinalScale;
line.Color = color;
line.Text = text;
line.ObjectID = objectID;
line.BoundingPolygon = null;
line.ObjectSelected = false;
line.InnerRadius = 0.0f;
line.OutterRadius = 0.0f;
string user_id;
if (objectID.LastIndexOf('_') >= 0)
{
user_id = objectID.Substring(0, objectID.LastIndexOf('_'));
}
else
{
return(false);
}
// If this is not a circle, create a bounding polygon for this object
Polygon newBoundingPoly = null;
if ((line.Mode == DrawModes.Line) || (line.Mode == DrawModes.Arrow))
{
GetLineBoundingPoly((float)line.Start.X, (float)line.Start.Y, (float)line.End.X, (float)line.End.Y,
(float)line.Width, (float)line.OriginalScale, out newBoundingPoly);
line.BoundingPolygon = newBoundingPoly;
}
else if (line.Mode == DrawModes.Circle)
{
float innerRadius;
float outterRadius;
GetCircleBoundingPoly((float)line.Start.X, (float)line.Start.Y, (float)line.End.X, (float)line.End.Y,
(float)line.Width, (float)line.OriginalScale, out newBoundingPoly,
out outterRadius, out innerRadius);
line.BoundingPolygon = newBoundingPoly;
line.InnerRadius = innerRadius;
line.OutterRadius = outterRadius;
}
if (string.Compare(user_id, DDD_Global.Instance.PlayerID) == 0)
{
lock (drawingCommandLock)
{
drawingCommands.Add(line);
}
}
else
{
drawingCommands.Add(line);
}
return(true);
}
public bool CircleSelectedByRect(LineObject lineObject, RectangleF selectionRect)
{
PointF circleDistance = new PointF();
float cornerDistance;
float testRadius;
bool intersectsOutterCir = false;
bool testResult;
if ((lineObject == null) || (lineObject.Mode != DrawModes.Circle))
{
return(false);
}
if ((lineObject.InnerRadius < 0) || (lineObject.OutterRadius <= 0) || (lineObject.InnerRadius > lineObject.OutterRadius))
{
return(false);
}
// Test for outter circle intersection (needs to be true to return true)
testRadius = lineObject.OutterRadius;
testResult = false;
circleDistance.X = Math.Abs((float)lineObject.Start.X - selectionRect.X - selectionRect.Width / 2);
circleDistance.Y = Math.Abs((float)lineObject.Start.Y - selectionRect.Y - selectionRect.Height / 2);
if (circleDistance.X > (selectionRect.Width / 2 + testRadius))
{
testResult = false;
}
else if (circleDistance.Y > (selectionRect.Height / 2 + testRadius))
{
testResult = false;
}
else if (circleDistance.X <= (selectionRect.Width / 2))
{
testResult = true;
}
else if (circleDistance.Y <= (selectionRect.Height / 2))
{
testResult = true;
}
else
{
cornerDistance = (float)Math.Sqrt(Math.Pow((circleDistance.X - selectionRect.Width / 2), 2) +
Math.Pow((circleDistance.Y - selectionRect.Height / 2), 2));
testResult = (cornerDistance <= testRadius);
}
if (testResult)
{
// Test for inner circle intersection (needs to be false or part of the rect
// must be outside the inner circle to return true)
testRadius = lineObject.InnerRadius;
testResult = false;
circleDistance.X = Math.Abs((float)lineObject.Start.X - selectionRect.X - selectionRect.Width / 2);
circleDistance.Y = Math.Abs((float)lineObject.Start.Y - selectionRect.Y - selectionRect.Height / 2);
if (circleDistance.X > (selectionRect.Width / 2 + testRadius))
{
testResult = true;
}
else if (circleDistance.Y > (selectionRect.Height / 2 + testRadius))
{
testResult = true;
}
else if (circleDistance.X <= (selectionRect.Width / 2))
{
testResult = true;
}
else if (circleDistance.Y <= (selectionRect.Height / 2))
{
testResult = true;
}
else
{
cornerDistance = (float)Math.Sqrt(Math.Pow((circleDistance.X - selectionRect.Width / 2), 2) +
Math.Pow((circleDistance.Y - selectionRect.Height / 2), 2));
testResult = (cornerDistance > testRadius);
}
}
return(testResult);
}
private bool IsAllowedSelection(LineObject lineObject)
{
string user_id;
string objectID = lineObject.ObjectID;
if (IsRoomOwner)
{
return true;
}
if (objectID.LastIndexOf('_') >= 0)
{
user_id = objectID.Substring(0, objectID.LastIndexOf('_'));
}
else
{
return false;
}
return (string.Compare(user_id, DDD_Global.Instance.PlayerID) == 0);
}
public bool AddLine(string objectID, DrawModes mode, LocationValue start, LocationValue end, double width, double oringinalScale, int color, string text)
{
LineObject line = new LineObject();
line.Mode = mode;
line.Start = start;
line.End = end;
line.Width = width;
line.OriginalScale = oringinalScale;
line.Color = color;
line.Text = text;
line.ObjectID = objectID;
line.BoundingPolygon = null;
line.ObjectSelected = false;
line.InnerRadius = 0.0f;
line.OutterRadius = 0.0f;
string user_id;
if (objectID.LastIndexOf('_') >= 0)
{
user_id = objectID.Substring(0, objectID.LastIndexOf('_'));
}
else
{
return false;
}
// If this is not a circle, create a bounding polygon for this object
Polygon newBoundingPoly = null;
if ((line.Mode == DrawModes.Line) || (line.Mode == DrawModes.Arrow))
{
GetLineBoundingPoly((float) line.Start.X, (float) line.Start.Y, (float) line.End.X, (float) line.End.Y,
(float) line.Width, (float) line.OriginalScale, out newBoundingPoly);
line.BoundingPolygon = newBoundingPoly;
}
else if (line.Mode == DrawModes.Circle)
{
float innerRadius;
float outterRadius;
GetCircleBoundingPoly((float)line.Start.X, (float)line.Start.Y, (float)line.End.X, (float)line.End.Y,
(float)line.Width, (float)line.OriginalScale, out newBoundingPoly,
out outterRadius, out innerRadius);
line.BoundingPolygon = newBoundingPoly;
line.InnerRadius = innerRadius;
line.OutterRadius = outterRadius;
}
if (string.Compare(user_id, DDD_Global.Instance.PlayerID) == 0)
{
lock (drawingCommandLock)
{
drawingCommands.Add(line);
}
}
else
{
drawingCommands.Add(line);
}
return true;
}
public bool CircleSelectedByRect(LineObject lineObject, RectangleF selectionRect)
{
PointF circleDistance = new PointF();
float cornerDistance;
float testRadius;
bool intersectsOutterCir = false;
bool testResult;
if ((lineObject == null) || (lineObject.Mode != DrawModes.Circle))
{
return false;
}
if ((lineObject.InnerRadius < 0) || (lineObject.OutterRadius <= 0) || (lineObject.InnerRadius > lineObject.OutterRadius))
{
return false;
}
// Test for outter circle intersection (needs to be true to return true)
testRadius = lineObject.OutterRadius;
testResult = false;
circleDistance.X = Math.Abs((float) lineObject.Start.X - selectionRect.X - selectionRect.Width / 2);
circleDistance.Y = Math.Abs((float) lineObject.Start.Y - selectionRect.Y - selectionRect.Height / 2);
if (circleDistance.X > (selectionRect.Width / 2 + testRadius)) {
testResult = false;
}
else if (circleDistance.Y > (selectionRect.Height / 2 + testRadius)) {
testResult = false;
}
else if (circleDistance.X <= (selectionRect.Width / 2)) {
testResult = true;
}
else if (circleDistance.Y <= (selectionRect.Height / 2))
{
testResult = true;
}
else
{
cornerDistance = (float)Math.Sqrt(Math.Pow((circleDistance.X - selectionRect.Width / 2), 2) +
Math.Pow((circleDistance.Y - selectionRect.Height / 2), 2));
testResult = (cornerDistance <= testRadius);
}
if (testResult)
{
// Test for inner circle intersection (needs to be false or part of the rect
// must be outside the inner circle to return true)
testRadius = lineObject.InnerRadius;
testResult = false;
circleDistance.X = Math.Abs((float)lineObject.Start.X - selectionRect.X - selectionRect.Width / 2);
circleDistance.Y = Math.Abs((float)lineObject.Start.Y - selectionRect.Y - selectionRect.Height / 2);
if (circleDistance.X > (selectionRect.Width / 2 + testRadius))
{
testResult = true;
}
else if (circleDistance.Y > (selectionRect.Height / 2 + testRadius))
{
testResult = true;
}
else if (circleDistance.X <= (selectionRect.Width / 2))
{
testResult = true;
}
else if (circleDistance.Y <= (selectionRect.Height / 2))
{
testResult = true;
}
else
{
cornerDistance = (float)Math.Sqrt(Math.Pow((circleDistance.X - selectionRect.Width / 2), 2) +
Math.Pow((circleDistance.Y - selectionRect.Height / 2), 2));
testResult = (cornerDistance > testRadius);
}
}
return testResult;
}
