// private
/// <summary>
/// Copy fields from this instance to cloned instance drawObject.
/// Called from Clone functions of derived classes.
/// </summary>
/// <param name="drawObject">Object being cloned</param>
protected void FillDrawObjectFields(DrawObject drawObject)
{
drawObject.selected = selected;
drawObject.color = color;
drawObject.penWidth = penWidth;
drawObject._endCap = _endCap;
drawObject.ID = ID;
drawObject._brushType = _brushType;
drawObject._penType = _penType;
drawObject.drawBrush = drawBrush;
drawObject.drawpen = drawpen;
drawObject.filled = filled;
drawObject.fillColor = fillColor;
drawObject._rotation = _rotation;
drawObject._center = _center;
drawObject.tipText = tipText;
}
private static Point TestForConnection(DrawArea drawArea, Point p, out int objectID)
{
// Determine if within 5 pixels of a connection point
// Step 1: see if a 5 x 5 rectangle centered on the mouse cursor intersects with an object
// Step 2: If it does, then see if there is a connection point within the rectangle
// Step 3: If there is, move the point to the connection point, record the object's id in the connector
//
objectID = -1;
Rectangle testRectangle = new Rectangle(p.X - 2, p.Y - 2, 5, 5);
int al = drawArea.TheLayers.ActiveLayerIndex;
bool connectionHere = false;
Point h = new Point(-1, -1);
GraphicsList gl = drawArea.TheLayers[al].Graphics;
for (int i = 1; i < gl.Count; i++)
{
if (gl[i].IntersectsWith(testRectangle))
{
DrawObject obj = (DrawObject)gl[i];
for (int j = 1; j < obj.HandleCount + 1; j++)
{
h = obj.GetHandle(j);
if (testRectangle.Contains(h))
{
connectionHere = true;
p = h;
objectID = obj.ID;
// obj.DrawConnection(drawArea., j);
break;
}
}
}
if (connectionHere)
{
break;
}
}
return(p);
}
// Replace objects in graphicsList with objects from list
private void ReplaceObjects(GraphicsList graphicsList, List <DrawObject> list)
{
for (int i = 0; i < graphicsList.Count; i++)
{
DrawObject replacement = null;
foreach (DrawObject o in list)
{
if (o.ID ==
graphicsList[i].ID)
{
replacement = o;
break;
}
}
if (replacement != null)
{
graphicsList.Replace(i, replacement);
}
}
}
/// <summary>
/// Add new object to draw area.
/// Function is called when user left-clicks draw area,
/// and one of ToolObject-derived tools is active.
/// </summary>
/// <param name="drawArea"></param>
/// <param name="o"></param>
protected void AddNewObject(DrawArea drawArea, DrawObject o)
{
int al = drawArea.TheLayers.ActiveLayerIndex;
drawArea.TheLayers[al].Graphics.UnselectAll();
o.Selected = true;
o.Dirty = true;
int objectID = 0;
// Set the object id now
for (int i = 0; i < drawArea.TheLayers.Count; i++)
{
objectID = +drawArea.TheLayers[i].Graphics.Count;
}
objectID++;
o.ID = objectID;
drawArea.TheLayers[al].Graphics.Add(o);
drawArea.Capture = true;
drawArea.Refresh();
}
/// <summary>
/// Returns (-1), (0), (+1) to represent the relative Z-order of the object being compared with this object
/// </summary>
/// <param name="obj">DrawObject that is compared to this object</param>
/// <returns> (-1) if the object is less (further back) than this object.
/// (0) if the object is equal to this object (same level graphically).
/// (1) if the object is greater (closer to the front) than this object.</returns>
public int CompareTo(object obj)
{
DrawObject d = obj as DrawObject;
int x = 0;
if (d != null)
{
if (d.ZOrder == ZOrder)
{
x = 0;
}
else if (d.ZOrder > ZOrder)
{
x = -1;
}
else
{
x = 1;
}
}
return(x);
}
/// <summary>
/// Right-click handler
/// </summary>
/// <param name="e"></param>
private void OnContextMenu(MouseEventArgs e)
{
// Change current selection if necessary
Point point = BackTrackMouse(new Point(e.X, e.Y));
Point menuPoint = new Point(e.X, e.Y);
int al = _layers.ActiveLayerIndex;
int n = _layers[al].Graphics.Count;
DrawObject o = null;
for (int i = 0; i < n; i++)
{
if (_layers[al].Graphics[i].HitTest(point) == 0)
{
o = _layers[al].Graphics[i];
break;
}
}
if (o != null)
{
if (!o.Selected)
{
_layers[al].Graphics.UnselectAll();
}
// Select clicked object
o.Selected = true;
}
else
{
_layers[al].Graphics.UnselectAll();
}
Refresh();
Owner.ctxtMenu.Show(this, menuPoint);
}
/// <summary>
/// Thanks to Member 3272353 for this fix to object ordering problem.
/// </summary>
/// <param name="obj"></param>
public void Append(DrawObject obj)
{
graphicsList.Add(obj);
}
public void AddAsInitialGraphic(DrawObject obj)
{
graphicsList.Add(obj);
}
// Create this command with DrawObject instance added to the list
public CommandAdd(DrawObject drawObject) : base()
{
// Keep copy of added object
this.drawObject = drawObject.Clone();
}
/// <summary>
/// Left mouse button is pressed
/// </summary>
/// <param name="drawArea"></param>
/// <param name="e"></param>
public override void OnMouseDown(DrawArea drawArea, MouseEventArgs e)
{
commandChangeState = null;
wasMove = false;
selectMode = SelectionMode.None;
Point point = drawArea.BackTrackMouse(new Point(e.X, e.Y));
// Test for resizing (only if control is selected, cursor is on the handle)
int al = drawArea.TheLayers.ActiveLayerIndex;
int n = drawArea.TheLayers[al].Graphics.SelectionCount;
for (int i = 0; i < n; i++)
{
DrawObject o = drawArea.TheLayers[al].Graphics.GetSelectedObject(i);
int handleNumber = o.HitTest(point);
if (handleNumber > 0)
{
selectMode = SelectionMode.Size;
// keep resized object in class members
resizedObject = o;
resizedObjectHandle = handleNumber;
// Since we want to resize only one object, unselect all other objects
drawArea.TheLayers[al].Graphics.UnselectAll();
o.Selected = true;
commandChangeState = new CommandChangeState(drawArea.TheLayers);
break;
}
}
// Test for move (cursor is on the object)
if (selectMode == SelectionMode.None)
{
int n1 = drawArea.TheLayers[al].Graphics.Count;
DrawObject o = null;
for (int i = 0; i < n1; i++)
{
if (drawArea.TheLayers[al].Graphics[i].HitTest(point) == 0)
{
o = drawArea.TheLayers[al].Graphics[i];
break;
}
}
if (o != null)
{
selectMode = SelectionMode.Move;
// Unselect all if Ctrl is not pressed and clicked object is not selected yet
if ((Control.ModifierKeys & Keys.Control) == 0 &&
!o.Selected)
{
drawArea.TheLayers[al].Graphics.UnselectAll();
}
// Select clicked object
o.Selected = true;
commandChangeState = new CommandChangeState(drawArea.TheLayers);
drawArea.Cursor = Cursors.SizeAll;
}
}
// Net selection
if (selectMode == SelectionMode.None)
{
// click on background
if ((Control.ModifierKeys & Keys.Control) == 0)
{
drawArea.TheLayers[al].Graphics.UnselectAll();
}
selectMode = SelectionMode.NetSelection;
drawArea.DrawNetRectangle = true;
}
lastPoint.X = point.X;
lastPoint.Y = point.Y;
startPoint.X = point.X;
startPoint.Y = point.Y;
drawArea.Capture = true;
drawArea.NetRectangle = DrawRectangle.GetNormalizedRectangle(startPoint, lastPoint);
drawArea.Refresh();
}
