public static float CalculateShapeArea(ShapeBase shape)
{
float s = 0;
if (shape.GetShapeType() == ShapeType.Ellipse)
{
var e = shape as Ellipse;
s = (float) Math.PI*e.MinorAxis*e.MajorAxis;
}
else
{
var vetices = shape.Vertices.Clone();
// Them p1 vao cuoi danh sach
vetices.Add(vetices[0]);
float x1 = vetices[0].X;
float y1 = vetices[0].Y;
for (int i = 1; i < vetices.Count; i++)
{
float x2 = vetices[i].X;
float y2 = vetices[i].Y;
float dx = x2 - x1;
float dy = y2 - y1;
s += 0.5F*dx*(dy + 2*y1);
x1 = x2;
y1 = y2;
}
}
return Math.Abs(s);
}
public void Paint(ShapeBase shape)
{
using (var graph = Graphics.FromImage(_page.ImageBuffer))
{
graph.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
_shapeDrawer.Draw(_viewport.WinToView(shape), graph);
}
}
public ShapeBase ViewToWin(ShapeBase shape)
{
var ret = shape.Clone();
ret.Location = ViewToWin(shape.Location);
ret.Size = ViewToWin(shape.Size);
ret.OutlineWidth = ViewToWin(shape.OutlineWidth);
for (int i = 0; i < shape.Vertices.Count; i++)
{
ret.Vertices[i].X = ViewToWin(shape.Vertices[i].X);
ret.Vertices[i].Y = ViewToWin(shape.Vertices[i].Y);
}
return ret;
}
public ShapeBase WinToView(ShapeBase shape)
{
if (shape == null)
return null;
var ret = shape.Clone();
ret.Location = WinToView(shape.Location);
ret.Size = WinToView(shape.Size);
ret.OutlineWidth = WinToView(shape.OutlineWidth);
for (int i = 0; i < shape.Vertices.Count; i++)
{
ret.Vertices[i].X = WinToView(shape.Vertices[i].X);
ret.Vertices[i].Y = WinToView(shape.Vertices[i].Y);
}
return ret;
}
public void Draw(ShapeBase shape, Graphics graphic)
{
if (shape == null)
return;
/* Draw shape*/
switch (shape.GetShapeType())
{
case ShapeType.Line:
case ShapeType.IsoscelesTriangle:
case ShapeType.Oblong:
case ShapeType.FreePencil:
case ShapeType.Polygon:
DrawPolygon((PolygonBase)shape, graphic);
break;
case ShapeType.Ellipse:
DrawEllipse((Ellipse)shape, graphic);
break;
}
}
public static Rectangle GetShapeBound(ShapeBase shape)
{
return new Rectangle(Point.Round(shape.Location), Size.Round(shape.Size));
}
public static RectangleF GetShapeBoundF(ShapeBase shape)
{
return new RectangleF(shape.Location, shape.Size);
}
public static Rectangle GetShapeBound(ShapeBase shape)
{
return(new Rectangle(Point.Round(shape.Location), Size.Round(shape.Size)));
}
public static RectangleF GetShapeBoundF(ShapeBase shape)
{
return(new RectangleF(shape.Location, shape.Size));
}
public DrawPad()
{
InitializeComponent();
Zoom = 1;
_shapeDrawer = new ShapeDrawer();
_filler = new Filler();
_drawingControl = new DrawingControl();
_drawingControl.SetShapDrawer(_shapeDrawer);
_drawingControl.ShapeCreated += DrawingControl_ShapeCreated;
_textControl = new TextControl(gdiArea);
_textControl.TextCreated += TextControl_TextCreated;
_textControl.TextChanged += TextControl_TextChanged;
_currentCommand = DrawPadCommand.None;
_currentShape = null;
_outlineWidth = 2F;
_outlineColor = Color.Black;
_outlineDash = DashStyle.Solid;
_fillColor = Color.Transparent;
_textFont = new Font("Segoe UI", 9.75F, FontStyle.Regular, GraphicsUnit.Point, 0);
_shapeArea = 0;
}
public void LoadShape(ShapeBase shape, Viewport viewport)
{
_shape = shape;
_viewport = viewport;
foreach (var ctrl in _controlPoints)
{
ctrl.LocationChanged -= Control_LocationChanged;
}
_controlPoints.Clear();
foreach (var v in _shape.Vertices)
{
var control = new ControlPoint((int)Math.Round(v.X), (int)Math.Round(v.Y), null);
control.LocationChanged += Control_LocationChanged;
control.Tag = v;
control.Cursor = Cursors.SizeAll;
_controlPoints.Add(control);
}
if (_shape.GetShapeType() == ShapeType.Ellipse)
{
_controlPoints.Add(new ControlPoint((int) Math.Round(_shape.Location.X + _shape.Size.Width/2),
(int) Math.Round(_shape.Location.Y), null));
_controlPoints.Add(new ControlPoint((int)Math.Round(_shape.Location.X + _shape.Size.Width),
(int)Math.Round(_shape.Location.Y + _shape.Size.Height/2), null));
_controlPoints.Add(new ControlPoint((int)Math.Round(_shape.Location.X + _shape.Size.Width/2),
(int)Math.Round(_shape.Location.Y + _shape.Size.Height), null));
_controlPoints.Add(new ControlPoint((int)Math.Round(_shape.Location.X),
(int)Math.Round(_shape.Location.Y + _shape.Size.Height/2), null));
}
}