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Added shape hit test and point editor

This commit is contained in:
Wiesław Šoltés 2015-08-05 17:34:34 +02:00
Родитель bcb06ea409
Коммит d45c97d47b
1 изменённых файлов: 231 добавлений и 93 удалений
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324
Wpf/Contexts/SpiroContext.cs
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@ -35,6 +35,7 @@ namespace SpiroNet.Wpf
{
private Mode _mode = Mode.Create;
private PathShape _shape = null;
private double _hitTreshold = 7;
private double _hitTresholdSquared = 49;
private PathShape _hitShape = null;
private int _hitShapePointIndex = -1;
@ -60,6 +61,12 @@ namespace SpiroNet.Wpf
set { Update(ref _shape, value); }
}
public double HitTreshold
{
get { return _hitTreshold; }
set { Update(ref _hitTreshold, value); }
}
public double HitTresholdSquared
{
get { return _hitTresholdSquared; }
@ -218,13 +225,22 @@ namespace SpiroNet.Wpf
Shapes.Add(_shape);
}
private void NewPoint(double x, double y)
private void NewPoint(PathShape shape, double x, double y)
{
var point = new SpiroControlPoint();
point.X = x;
point.Y = y;
point.Type = PointType;
_shape.Points.Add(point);
shape.Points.Add(point);
}
private void NewPointAt(PathShape shape, double x, double y, int index)
{
var point = new SpiroControlPoint();
point.X = x;
point.Y = y;
point.Type = PointType;
shape.Points.Insert(index, point);
}
private void SetLastPointPosition(double x, double y)
@ -257,6 +273,18 @@ namespace SpiroNet.Wpf
_shape.Points[_shape.Points.Count - 1] = point;
}
private static bool TryGetData(PathShape shape, IBezierContext bc)
{
if (shape == null || bc == null)
return false;
var points = shape.Points.ToArray();
if (shape.IsTagged)
return Spiro.TaggedSpiroCPsToBezier0(points, bc);
else
return Spiro.SpiroCPsToBezier0(points, points.Length, shape.IsClosed, bc);
}
private void UpdateData(PathShape shape)
{
if (shape == null)
@ -264,25 +292,16 @@ namespace SpiroNet.Wpf
try
{
if (Data.ContainsKey(shape))
if (_data.ContainsKey(shape))
{
string data;
if (shape.TryGetData(out data))
{
Data[shape] = data;
}
else
{
Data[shape] = null;
}
var bc = new PathBezierContext();
_data[shape] = TryGetData(shape, bc) ? bc.ToString() : null;
}
else
{
string data;
if (shape.TryGetData(out data))
{
Data.Add(shape, data);
}
var bc = new PathBezierContext();
if (TryGetData(shape, bc))
_data.Add(shape, bc.ToString());
}
}
catch (Exception ex)
@ -292,91 +311,22 @@ namespace SpiroNet.Wpf
}
}
public void LeftDown(double x, double y)
{
if (_shape == null)
{
PathShape hitShape;
int hitShapePointIndex;
var result = HitTest(x, y, out hitShape, out hitShapePointIndex);
if (result)
{
_hitShape = hitShape;
_hitShapePointIndex = hitShapePointIndex;
_mode = Mode.Move;
Invalidate();
return;
}
else
{
if (_hitShape != null)
{
_hitShape = null;
_hitShapePointIndex = -1;
_mode = Mode.Create;
Invalidate();
return;
}
}
}
if (_mode == Mode.Create)
{
if (_shape == null)
{
NewShape();
}
NewPoint(x, y);
UpdateData(_shape);
Invalidate();
}
}
public void LeftUp(double x, double y)
{
if (_mode == Mode.Move)
{
_mode = Mode.Selected;
}
}
public void RightDown(double x, double y)
{
if (_shape != null)
{
UpdateData(_shape);
Invalidate();
_shape = null;
}
else
{
if (_hitShape != null)
{
_hitShape = null;
_hitShapePointIndex = -1;
_mode = Mode.Create;
Invalidate();
}
}
}
private double DistanceSquared(double x0, double y0, double x1, double y1)
private static double DistanceSquared(double x0, double y0, double x1, double y1)
{
double dx = x0 - x1;
double dy = y0 - y1;
return dx * dx + dy * dy;
}
private bool HitTest(double x, double y, out PathShape hitShape, out int hitShapePointIndex)
private static bool HitTestForPoint(IList<PathShape> shapes, double x, double y, double tresholdSquared, out PathShape hitShape, out int hitShapePointIndex)
{
foreach (var shape in _shapes)
foreach (var shape in shapes)
{
for (int i = 0; i < shape.Points.Count; i++)
{
var point = shape.Points[i];
var distance = DistanceSquared(x, y, point.X, point.Y);
if (distance < _hitTresholdSquared)
if (distance < tresholdSquared)
{
hitShape = shape;
hitShapePointIndex = i;
@ -389,6 +339,180 @@ namespace SpiroNet.Wpf
return false;
}
private static bool HitTestForShape(IList<PathShape> shapes, double x, double y, double treshold, out PathShape hitShape, out int hitShapePointIndex)
{
for (int i = 0; i < shapes.Count; i++)
{
var bc = new PathHitTestBezierContext(x, y);
var shape = shapes[i];
int knontIndex;
try
{
if (!TryGetData(shape, bc))
continue;
}
catch (Exception ex)
{
Debug.Print(ex.Message);
Debug.Print(ex.StackTrace);
continue;
}
if (bc.Report(out knontIndex) < treshold)
{
hitShape = shape;
hitShapePointIndex = knontIndex;
return true;
}
}
hitShape = null;
hitShapePointIndex = -1;
return false;
}
public void LeftDown(double x, double y)
{
if (_shape == null)
{
PathShape hitShape;
int hitShapePointIndex;
// Hit test for point.
var result = HitTestForPoint(_shapes, x, y, _hitTresholdSquared, out hitShape, out hitShapePointIndex);
if (result)
{
// Select point.
_hitShape = hitShape;
_hitShapePointIndex = hitShapePointIndex;
// Begin move.
_mode = Mode.Move;
Invalidate();
return;
}
else
{
// Hit test for shape and nearest point.
if (HitTestForShape(_shapes, x, y, _hitTreshold, out hitShape, out hitShapePointIndex))
{
// Insert new point.
PathShape shape = hitShape;
int index = hitShapePointIndex + 1;
NewPointAt(shape, x, y, index);
// Select shape.
//_hitShape = shape;
// Select new point.
//_hitShapePointIndex = index;
//_mode = Mode.Selected;
// Deselect shape.
_hitShape = null;
// Deselect point.
_hitShapePointIndex = -1;
_mode = Mode.Create;
UpdateData(shape);
Invalidate();
return;
}
if (_hitShape != null)
{
// Deselect shape.
_hitShape = null;
// Deselect point.
_hitShapePointIndex = -1;
// Begin edit.
_mode = Mode.Create;
Invalidate();
return;
}
}
}
if (_mode == Mode.Create)
{
// Add new shape.
if (_shape == null)
NewShape();
// Add new point.
NewPoint(_shape, x, y);
UpdateData(_shape);
Invalidate();
}
}
public void LeftUp(double x, double y)
{
if (_mode == Mode.Move)
{
// Finish move.
_mode = Mode.Selected;
}
}
public void RightDown(double x, double y)
{
if (_shape != null)
{
// Finish create.
UpdateData(_shape);
Invalidate();
_shape = null;
}
else
{
if (_hitShape != null)
{
// Deselect point.
_hitShape = null;
_hitShapePointIndex = -1;
// Begin create.
_mode = Mode.Create;
Invalidate();
}
PathShape hitShape;
int hitShapePointIndex;
var result = HitTestForPoint(_shapes, x, y, _hitTresholdSquared, out hitShape, out hitShapePointIndex);
if (result)
{
// Delete point.
hitShape.Points.RemoveAt(hitShapePointIndex);
if (hitShape.Points.Count == 0)
{
// Delete shape.
_shapes.Remove(hitShape);
_data.Remove(hitShape);
Invalidate();
}
else
{
UpdateData(hitShape);
Invalidate();
}
return;
}
else
{
if (HitTestForShape(_shapes, x, y, _hitTreshold, out hitShape, out hitShapePointIndex))
{
// Delete shape.
_shapes.Remove(hitShape);
_data.Remove(hitShape);
Invalidate();
return;
}
}
}
}
public void Move(double x, double y)
{
if (_shape != null)
@ -412,17 +536,31 @@ namespace SpiroNet.Wpf
{
PathShape hitShape;
int hitShapePointIndex;
var result = HitTest(x, y, out hitShape, out hitShapePointIndex);
var result = HitTestForPoint(_shapes, x, y, _hitTresholdSquared, out hitShape, out hitShapePointIndex);
if (result)
{
// Hover shape.
_hitShape = hitShape;
// Hover point.
_hitShapePointIndex = hitShapePointIndex;
Invalidate();
}
else
{
_hitShape = null;
_hitShapePointIndex = -1;
if (HitTestForShape(_shapes, x, y, _hitTreshold, out hitShape, out hitShapePointIndex))
{
// Hover shape.
_hitShape = hitShape;
// Dehover point.
_hitShapePointIndex = -1;
}
else
{
// Dehover shape.
_hitShape = null;
// Dehover point.
_hitShapePointIndex = -1;
}
Invalidate();
}
}