void _demoTimer_Tick(object sender, EventArgs e)
{
if (_t0 != null)
{
if (_t0 <= 1)
{
bool isBezier = _animateCurve != null;
Point[] arrPoints = isBezier ? new Point[]
{
_animateCurve.SourceState.Position,
_animateCurve.ControlPoints[0],
_animateCurve.ControlPoints[1],
_animateCurve.DestinationState.Position
} : _endPoints;
Point[] resultPoints = CalcParamPoint(arrPoints, (float)_t0, isBezier);
if (isBezier)
{
_bPoints = resultPoints;
}
else
{
_paramPoint = resultPoints[0];
}
_t0 += 0.05f;
}
else
{
_t1 = 255;
_t0 = null;
}
}
if (_t1 != null)
{
int r = (int)(_ColorGradients[1].R * (255 - _t1) / 255.0 +
_ColorGradients[0].R * _t1 / 255.0);
int g = (int)(_ColorGradients[1].G * (255 - _t1) / 255.0 +
_ColorGradients[0].G * _t1 / 255.0);
int b = (int)(_ColorGradients[1].B * (255 - _t1) / 255.0 +
_ColorGradients[0].B * _t1 / 255.0);
_paramColor = Color.FromArgb(r, g, b);
_t1 -= 12.75f;
if (_t1 < 0)
{
_demoTimer.Stop();
_event.Set();
_hilightState = null;
_t0 = _t1 = null;
_animateCurve = null;
}
}
Invalidate();
}
public void doBackground(object obj)
{
var inputString = obj as string;
var state = _beginState;
DemoFinishedEvent dfe = new DemoFinishedEvent();
for (int i = 0; i < inputString.Length; i++)
{
if (state.Transitions.ContainsKey(inputString[i]))
{
_t0 = 0;
_t1 = null;
var destinedStates = state.Transitions[inputString[i]] as List <State>;
_endPoints[0] = state.Position;
int random = 0;
//đối với NFA, một trạng thái tới ngẫu nhiên sẽ được chọn
if (destinedStates.Count > 1)
{
random = _rnd.Next(0, destinedStates.Count);
}
var destinedState = destinedStates[random];
_animateCurve = (CurvedStateConnector)state.Find(
o => o is CurvedStateConnector &&
((CurvedStateConnector)(o)).DestinationState == destinedState);
_endPoints[1] = destinedState.Position;
_ColorGradients[0] = Color.FromArgb(0xCC, 0x66, 0xFF);
_ColorGradients[1] = Color.FromArgb(0x00, 0x66, 0xFF);
_hilightState = destinedState;
//phải được gọi trong ngữ cảnh của UI thread
startTimer();
_event.WaitOne();
state = destinedState;
}
else
{
dfe.LanguageIsAccepted = false;
DemoFinished(this, dfe);
return;
}
}
if (_finalStates.Contains(state))
{
dfe.LanguageIsAccepted = true;
System.Console.WriteLine("Automat accepts this input string");
}
else
{
dfe.LanguageIsAccepted = false;
}
DemoFinished(this, dfe);
}
public void EnterCurveDrawingMode()
{
_bCurve = true;
CurvedStateConnector curvedConnector;
if (!(_selectedObj is CurvedStateConnector))
{
if (_selectedObj is StateConnector)
{
var stateConnector = _selectedObj as StateConnector;
int index = Array.FindIndex(_selectables, obj => obj == _selectedObj);
if (index != -1)
{
int labelIndex = Array.FindIndex(_selectables,
obj => obj == stateConnector.Label);
curvedConnector = new CurvedStateConnector(
stateConnector.SourceState,
stateConnector.DestinationState);
_selectables[index] = curvedConnector;
_selectables[labelIndex] = curvedConnector.Label;
_selectedObj = curvedConnector;
curvedConnector.IsSelected = true;
}
else
{
throw new InvalidOperationException(OBJECT_NOT_TRACKED_ERROR);
}
}
else
{
throw new InvalidOperationException(CONVERSION_ERROR);
}
}
curvedConnector = _selectedObj as CurvedStateConnector;
_curveControlPoints[0] = curvedConnector.ControlPoints[0];
_curveControlPoints[1] = curvedConnector.ControlPoints[1];
}
protected override void OnPaint(PaintEventArgs pe)
{
base.OnPaint(pe);
if (!_bShow)
{
return;
}
Font stateFont = new Font("Arial", 10, FontStyle.Bold, GraphicsUnit.Point);
StringFormat strFormat = new StringFormat
{
Alignment = StringAlignment.Center,
LineAlignment = StringAlignment.Center
};
Pen borderPen = new Pen(Color.ForestGreen, 1);
Pen redPen = new Pen(Color.Red, 2);
Pen connectorPen = new Pen(Color.FromArgb(0x33, 0x00, 0x33), 1);
Brush arrowBrush = new SolidBrush(Color.FromArgb(0x33, 0x00, 0x33));
foreach (Selectable _selectable in _selectables)
{
CurvedStateConnector curvedConnector = null;
if (_selectable is StateConnector)
{
var connector = _selectable as StateConnector;
if (connector.Label.IsSelected)
{
Pen labelBorderPen = new Pen(Color.DarkRed, 1.5f)
{
DashStyle = DashStyle.Dash
};
var labelRect = connector.Label.GetRect(_automatGraphics);
_automatGraphics.DrawRectangle(labelBorderPen, labelRect.Left,
labelRect.Top, labelRect.Width, labelRect.Height);
labelBorderPen.Dispose();
}
Pen pen = connector.IsSelected ? redPen : connectorPen;
if (_selectable is CurvedStateConnector)
{
curvedConnector = _selectable as CurvedStateConnector;
}
if (curvedConnector != null &&
curvedConnector.ControlPoints[0] != _InvalidPoint &&
curvedConnector.ControlPoints[1] != _InvalidPoint)
{
_automatGraphics.DrawBezier(pen, curvedConnector.SourceState.Position,
curvedConnector.ControlPoints[0],
curvedConnector.ControlPoints[1],
curvedConnector.DestinationState.Position);
_automatGraphics.DrawString(curvedConnector.Label.Text, ConnectorLabel.LabelFont,
Brushes.Brown, connector.Label.Position);
}
else
{
_automatGraphics.DrawLine(pen, connector.SourceState.Position,
connector.DestinationState.Position);
_automatGraphics.DrawString(connector.Label.Text, ConnectorLabel.LabelFont,
Brushes.Brown, connector.Label.Position);
}
if (connector.ArrowPoints != null)
{
_automatGraphics.DrawLine(pen, connector.ArrowPoints[0],
connector.ArrowPoints[1]);
_automatGraphics.DrawLine(pen, connector.ArrowPoints[0],
connector.ArrowPoints[2]);
}
}
else if (_selectable is State)
{
var state = _selectable as State;
GraphicsPath gp = new GraphicsPath();
gp.AddEllipse(state.BoundingRect);
var boundColor = (_selectable == _hilightState && _t1 >= 0 &&
_t1 <= 255) ? _paramColor :
Color.FromArgb(0xCC, 0x66, 0xFF);
Color[] colors =
{
boundColor, // dark green
Color.FromArgb(0xCC, 0xCC, 0xFF), // aqua
Color.FromArgb(0xCC, 0xFF, 0xFF)
}; // blue
float[] relativePositions =
{
0f, // Dark green is at the boundary of the triangle.
0.58f, // Aqua is 40 percent of the way from the boundary
// to the center point.
1.0f
}; // Blue is at the center point.
ColorBlend colorBlend = new ColorBlend();
colorBlend.Colors = colors;
colorBlend.Positions = relativePositions;
PathGradientBrush grd = new PathGradientBrush(gp);
//{
// SurroundColors = new Color[] { Color.FromArgb(0xCC, 0x33, 0xCC) },
// CenterColor = Color.FloralWhite
//};
grd.InterpolationColors = colorBlend;
_automatGraphics.FillEllipse(grd, state.BoundingRect);
_automatGraphics.DrawString(state.Label, stateFont, Brushes.DarkSlateBlue,
state.BoundingRect, strFormat);
Pen stateBorderPen = state.IsSelected ? redPen : borderPen;
_automatGraphics.DrawEllipse(stateBorderPen, state.BoundingRect);
if (IsFinalState(state))
{
Pen markPen = new Pen(Color.Maroon, 4);
var newRect = state.BoundingRect;
newRect.Inflate(3, 3);
_automatGraphics.DrawEllipse(markPen, newRect);
markPen.Dispose();
}
if (_beginState == state)
{
Pen pen_draw = new Pen(Color.Black);
Point[] pnt = new Point[3];
if (state.X < 305)
{
pnt[0].X = state.X - 60;
pnt[0].Y = state.Y - 15;
pnt[1].X = state.X - 60;
pnt[1].Y = state.Y + 15;
pnt[2].X = state.X - 30;
pnt[2].Y = state.Y;
}
else if (state.X > 305)
{
pnt[0].X = state.X + 60;
pnt[0].Y = state.Y - 15;
pnt[1].X = state.X + 60;
pnt[1].Y = state.Y + 15;
pnt[2].X = state.X + 30;
pnt[2].Y = state.Y;
}
_automatGraphics.DrawPolygon(pen_draw, pnt);
}
grd.Dispose();
gp.Dispose();
}
}
if (_bCurve)
{
if (_curveControlPoints[0] != InvalidPoint)
{
OnPaintHandle(_curveControlPoints[0]);
}
if (_curveControlPoints[1] != InvalidPoint)
{
OnPaintHandle(_curveControlPoints[1]);
}
}
OnAnimatePaint(_automatGraphics);
pe.Graphics.DrawImage(_automatBitmap, DisplayRectangle, DisplayRectangle,
GraphicsUnit.Pixel);
stateFont.Dispose();
strFormat.Dispose();
borderPen.Dispose();
redPen.Dispose();
connectorPen.Dispose();
arrowBrush.Dispose();
}
public void BuildAutomata()
{
_bShow = true;
_SelCtrlPointIndex = -1;
_angleStep = 2 * Math.PI / _drawnStateList.Count;
int halfWidth = DisplayRectangle.Width / 2;
Point ptCenter = new Point(halfWidth, DisplayRectangle.Height / 2);
//int r = halfWidth * 2 / 3;
int r = -200;
double a = 0;
List <Selectable> selectableList = new List <Selectable>();
//pre calculate States's position
foreach (State state in _drawnStateList)
{
if (state.Label == "q0")
{
_beginState = state;
}
state.X = (int)(r * Math.Cos(a)) + ptCenter.X;
state.Y = (int)(r * Math.Sin(a)) + ptCenter.Y;
selectableList.Add(state);
foreach (DictionaryEntry de in state.Transitions) //tạo đường nối
{
var deValue = de.Value as List <State>;
foreach (var destinedState in deValue)
{
//try to compact State Connectors
StateConnector dupConnector = null;
if (state == destinedState)
{
//phải tìm đường nối cong sẵn có
dupConnector = (CurvedStateConnector)selectableList.Find
(obj => obj is CurvedStateConnector &&
((StateConnector)obj).DestinationState == destinedState &&
((StateConnector)obj).SourceState == state);
}
else
{
dupConnector = (StateConnector)selectableList.Find
(obj => obj is StateConnector &&
((StateConnector)obj).DestinationState == destinedState &&
((StateConnector)obj).SourceState == state);
}
if (dupConnector != null)
{
continue;
}
else
{
StateConnector connector;
if (state == destinedState)
{
//nếu trạng thái đi và đến là cùng một trạng thái
//thì ta sẽ tạo đường cong
CurvedStateConnector newCurvedConnector = new CurvedStateConnector
(state, destinedState);
var p = new Point();
if (state.Y < 305)
{
p = new Point(state.Position.X, state.Position.Y - 100);
}
else
{
p = new Point(state.Position.X, state.Position.Y + 100);
}
var controlPoints = newCurvedConnector.ControlPoints;
controlPoints[0].X = p.X - 30;
controlPoints[0].Y = controlPoints[1].Y = p.Y;
controlPoints[1].X = p.X + 30;
connector = newCurvedConnector;
}
else
{
connector = new StateConnector(state, destinedState);
}
selectableList.Add(connector);
}
}
}
a += _angleStep;
}
List <Selectable> labelList = new List <Selectable>();
foreach (Selectable _selectable in selectableList)
{
if (_selectable is StateConnector)
{
var connector = _selectable as StateConnector;
connector.CalcArrow();
connector.CalcLabelPosition();
labelList.Add(connector.Label);
}
}
selectableList.AddRange(labelList);
selectableList.Sort(CompareSelectables);
_selectables = selectableList.ToArray();
}