private void frmPaint_KeyDown(object sender, KeyEventArgs e)
{
isControlKeyPress = e.Control;
KhungVe.Focus();
if (e.Control)
{
movingOffset = 1;
}
else
{
movingOffset = 5;
}
if (e.KeyCode == Keys.Up)
{
MoveShape(ToUp);
}
else if (e.KeyCode == Keys.Down)
{
MoveShape(ToDown);
}
else if (e.KeyCode == Keys.Left)
{
MoveShape(ToLeft);
}
else if (e.KeyCode == Keys.Right)
{
MoveShape(ToRight);
}
else if (e.KeyCode == Keys.Delete)
{
btnDelete.PerformClick();
}
}
private void btnSelect_Click(object sender, EventArgs e)
{
shapes.ForEach(shape => shape.IsSelected = false);
KhungVe.Invalidate();
currentShape = CurrentShape.NoDrawing;
UncheckAll();
btnSelect.BackColor = Color.Silver;
KhungVe.Cursor = Cursors.Default;
}
private void btnColors_Click(object sender, EventArgs e)
{
ColorDialog color = new ColorDialog();
if (color.ShowDialog() == DialogResult.OK)
{
btnColors.BackColor = color.Color;
}
KhungVe.Invalidate();
}
private void btnDelete_Click(object sender, EventArgs e)
{
for (int i = 0; i < shapes.Count; i++)
{
if (shapes[i].IsSelected)
{
shapes.RemoveAt(i);
}
}
KhungVe.Invalidate();
}
private void MoveShape(Action <int> action)
{
for (int i = 0; i < shapes.Count; i++)
{
if (shapes[i].IsSelected)
{
action(i);
}
}
KhungVe.Invalidate();
}
private void btnFill_Click(object sender, EventArgs e)
{
for (int i = 0; i < shapes.Count; i++)
{
if (shapes[i].IsSelected)
{
shapes[i].FillColor = true;
shapes[i].Color = btnColors.BackColor;
}
}
KhungVe.Invalidate();
}
private void btnCircle_Click(object sender, EventArgs e)
{
shapes.ForEach(shape => shape.IsSelected = false);
KhungVe.Invalidate();
if (btnCircle.BackColor == Color.Silver)
{
UncheckAll();
currentShape = CurrentShape.NoDrawing;
KhungVe.Cursor = Cursors.Default;
btnSelect.BackColor = Color.Silver;
}
else
{
UncheckAll();
KhungVe.Cursor = Cursors.Cross;
currentShape = CurrentShape.Circle;
btnCircle.BackColor = Color.Silver;
}
}
private void KhungVe_MouseDoubleClick(object sender, MouseEventArgs e)
{
if (isDrawPolygon)
{
isDrawPolygon = false;
Polygon polygon = shapes[shapes.Count - 1] as Polygon;
polygon.Points.RemoveAt(polygon.Points.Count - 1);
KhungVe.Invalidate();
FindPolygonRegion(polygon);
}
else if (isDrawPyramid)
{
isDrawPyramid = false;
Pyramid pyramid = shapes[shapes.Count - 1] as Pyramid;
pyramid.Points.RemoveAt(pyramid.Points.Count - 1);
KhungVe.Invalidate();
FindPyramidRegion(pyramid);
}
else if (isDrawCurve)
{
isDrawCurve = false;
Curve curve = shapes[shapes.Count - 1] as Curve;
curve.Points.RemoveAt(curve.Points.Count - 1);
curve.Points.RemoveAt(curve.Points.Count - 1);
KhungVe.Invalidate();
FindCurveRegion(curve);
}
}
private void KhungVe_MouseUp(object sender, MouseEventArgs e)
{
isMouseDown = false;
if (isMovingShape)
{
isMovingShape = false;
selectedShape = null;
}
else if (isMouseSelect)
{
isMouseSelect = false;
for (int i = 0; i < shapes.Count; i++)
{
shapes[i].IsSelected = false;
if (shapes[i].Begin.X >= selectedRegion.X && shapes[i].End.X <= selectedRegion.X + selectedRegion.Width && shapes[i].Begin.Y >= selectedRegion.Y && shapes[i].End.Y <= selectedRegion.Y + selectedRegion.Height)
{
shapes[i].IsSelected = true;
}
}
KhungVe.Invalidate();
}
try
{
Shape shape = shapes[shapes.Count - 1];
if (shape.Begin.X > shape.End.X || (shape.Begin.X == shape.End.X && shape.Begin.Y > shape.End.Y))
{
Point temp = shape.Begin;
shape.Begin = shape.End;
shape.End = temp;
}
if (shape is Circle circle)
{
circle.End = new Point(circle.Begin.X + circle.Diameter, circle.Begin.Y + circle.Diameter);
}
else if (shape is Square square)
{
if (square.Begin.X < square.End.X && square.Begin.Y > square.End.Y)
{
square.Begin = new Point(square.Begin.X, square.End.Y);
square.End = new Point(square.Begin.X + square.Width, square.Begin.Y + square.Width);
}
else
{
square.End = new Point(square.Begin.X + square.Width, square.Begin.Y + square.Width);
}
}
else if (shape is Shapes.Rectangle rect)
{
if (rect.Begin.X < rect.End.X && rect.Begin.Y > rect.End.Y)
{
Point begin = rect.Begin, end = rect.End;
rect.Begin = new Point(begin.X, end.Y);
rect.End = new Point(end.X, begin.Y);
}
}
}
catch
{
}
}
private void KhungVe_MouseMove(object sender, MouseEventArgs e)
{
if (isMouseDown)
{
shapes[shapes.Count - 1].End = e.Location;
KhungVe.Invalidate();
}
else if (isMovingShape)
{
Point d = new Point(e.X - previousPoint.X, e.Y - previousPoint.Y);
selectedShape.Move(d);
previousPoint = e.Location;
KhungVe.Invalidate();
}
else if (currentShape == CurrentShape.NoDrawing)
{
if (isMouseSelect)
{
selectedRegion.Width = e.Location.X - selectedRegion.X;
selectedRegion.Height = e.Location.Y - selectedRegion.Y;
KhungVe.Invalidate();
}
else
{
if (shapes.Exists(shape => shape.IsHit(e.Location)))
{
KhungVe.Cursor = Cursors.SizeAll;
}
else
{
KhungVe.Cursor = Cursors.Default;
}
}
}
if (isDrawPolygon)
{
Polygon polygon = shapes[shapes.Count - 1] as Polygon;
polygon.Points[polygon.Points.Count - 1] = e.Location;
KhungVe.Invalidate();
}
else if (isDrawPyramid)
{
Pyramid pyramid = shapes[shapes.Count - 1] as Pyramid;
pyramid.Points[pyramid.Points.Count - 1] = e.Location;
KhungVe.Invalidate();
}
else if (isDrawCurve)
{
Curve curve = shapes[shapes.Count - 1] as Curve;
curve.Points[curve.Points.Count - 1] = e.Location;
KhungVe.Invalidate();
}
else if (isDrawBezier)
{
Curve bezier = shapes[shapes.Count - 1] as Curve;
bezier.Points[bezier.Points.Count - 1] = e.Location;
KhungVe.Invalidate();
}
}
private void KhungVe_MouseDown(object sender, MouseEventArgs e)
{
if (currentShape == CurrentShape.NoDrawing)
{
if (isControlKeyPress)
{
for (int i = 0; i < shapes.Count; i++)
{
if (shapes[i].IsHit(e.Location))
{
shapes[i].IsSelected = !shapes[i].IsSelected;
KhungVe.Invalidate();
break;
}
}
}
else
{
shapes.ForEach(shape => shape.IsSelected = false);
KhungVe.Invalidate();
for (int i = 0; i < shapes.Count; i++)
{
if (shapes[i].IsHit(e.Location))
{
selectedShape = shapes[i];
shapes[i].IsSelected = true;
KhungVe.Invalidate();
break;
}
}
if (selectedShape != null)
{
isMovingShape = true;
previousPoint = e.Location;
}
else
{
isMouseSelect = true;
selectedRegion = new System.Drawing.Rectangle(e.Location, new Size(0, 0));
}
}
}
else
{
isMouseDown = true;
shapes.ForEach(shape => shape.IsSelected = false);
if (currentShape == CurrentShape.Line)
{
Line line = new Line
{
Begin = e.Location,
LineWidth = cbSize.SelectedIndex,
Color = btnColors.BackColor,
DashStyle = DashStyle.Solid
};
shapes.Add(line);
}
else if (currentShape == CurrentShape.Rectangle)
{
Shapes.Rectangle rectangle = new Shapes.Rectangle
{
Begin = e.Location,
LineWidth = cbSize.SelectedIndex,
Color = btnColors.BackColor,
DashStyle = DashStyle.Solid
};
shapes.Add(rectangle);
}
else if (currentShape == CurrentShape.Ellipse)
{
Ellipse ellipse = new Ellipse
{
Begin = e.Location,
LineWidth = cbSize.SelectedIndex,
Color = btnColors.BackColor,
DashStyle = DashStyle.Solid
};
shapes.Add(ellipse);
}
else if (currentShape == CurrentShape.Square)
{
Square square = new Square
{
Begin = e.Location,
LineWidth = cbSize.SelectedIndex,
Color = btnColors.BackColor,
DashStyle = DashStyle.Solid
};
shapes.Add(square);
}
else if (currentShape == CurrentShape.Circle)
{
Circle circle = new Circle
{
Begin = e.Location,
LineWidth = cbSize.SelectedIndex,
Color = btnColors.BackColor,
DashStyle = DashStyle.Solid
};
shapes.Add(circle);
}
else if (currentShape == CurrentShape.Polygon)
{
if (!isDrawPolygon)
{
Polygon polygon = new Polygon
{
LineWidth = cbSize.SelectedIndex,
Color = btnColors.BackColor,
DashStyle = DashStyle.Solid
};
polygon.Points.Add(e.Location);
polygon.Points.Add(e.Location);
shapes.Add(polygon);
isDrawPolygon = true;
}
else
{
Polygon polygon = shapes[shapes.Count - 1] as Polygon;
polygon.Points[polygon.Points.Count - 1] = e.Location;
polygon.Points.Add(e.Location);
}
isMouseDown = false;
}
else if (currentShape == CurrentShape.Pyramid)
{
if (!isDrawPyramid)
{
Pyramid pyramid = new Pyramid
{
LineWidth = cbSize.SelectedIndex,
Color = btnColors.BackColor,
DashStyle = DashStyle.Solid
};
pyramid.Points.Add(e.Location);
pyramid.Points.Add(e.Location);
shapes.Add(pyramid);
isDrawPyramid = true;
}
else
{
Pyramid pyramid = shapes[shapes.Count - 1] as Pyramid;
pyramid.Points[pyramid.Points.Count - 1] = e.Location;
pyramid.Points.Add(e.Location);
if (pyramid.Points.Count == 4)
{
isDrawPyramid = false;
}
}
isMouseDown = false;
}
else if (currentShape == CurrentShape.Bezier)
{
if (!isDrawBezier)
{
Curve bezier = new Curve
{
LineWidth = cbSize.SelectedIndex,
Color = btnColors.BackColor,
DashStyle = DashStyle.Solid
};
bezier.Points.Add(e.Location);
bezier.Points.Add(e.Location);
shapes.Add(bezier);
isDrawBezier = true;
}
else
{
Curve bezier = shapes[shapes.Count - 1] as Curve;
if (bezier.Points.Count < 4)
{
bezier.Points[bezier.Points.Count - 1] = e.Location;
bezier.Points.Add(e.Location);
}
else
{
isDrawBezier = false;
FindCurveRegion(bezier);
}
}
isMouseDown = false;
}
}
}
