private void FindGroupRegion(Group group)
{
int minX = int.MaxValue, minY = int.MaxValue, maxX = int.MinValue, maxY = int.MinValue;
for (int i = 0; i < group.Shapes.Count; i++)
{
ShapeObject shape = group.Shapes[i];
if (shape is Polygon polygon)
{
FindPolygonRegion(polygon);
}
if (shape.p1.X < minX)
{
minX = shape.p1.X;
}
if (shape.p2.X < minX)
{
minX = shape.p2.X;
}
if (shape.p1.Y < minY)
{
minY = shape.p1.Y;
}
if (shape.p2.Y < minY)
{
minY = shape.p2.Y;
}
if (shape.p1.X > maxX)
{
maxX = shape.p1.X;
}
if (shape.p2.X > maxX)
{
maxX = shape.p2.X;
}
if (shape.p1.Y > maxY)
{
maxY = shape.p1.Y;
}
if (shape.p2.Y > maxY)
{
maxY = shape.p2.Y;
}
}
group.p1 = new Point(minX, minY);
group.p2 = new Point(maxX, maxY);
}
private void PanelPaint_MouseUp(object sender, MouseEventArgs e)
{
try
{
isMouseDown = false;
if (isMovingShape)
{
isMovingShape = false;
selectedShape = null;
}
else if (isResizeShape)
{
isResizeShape = false;
resizeShape = null;
}
else if (isMouseSelect)
{
isMouseSelect = false; // select
for (int i = 0; i < lstObject.Count; i++)
{
lstObject[i].IsSelected = false;
if (lstObject[i].p1.X >= selectedRegion.X && lstObject[i].p2.X <= selectedRegion.X + selectedRegion.Width &&
lstObject[i].p1.Y >= selectedRegion.Y && lstObject[i].p2.Y <= selectedRegion.Y + selectedRegion.Height)
{
lstObject[i].IsSelected = true;
}
}
PanelPaint.Invalidate();
}
if (currentShape != CurrentShape.Polygon && currentShape != CurrentShape.NoDrawing)
{
lstObject[lstObject.Count - 1].p2 = e.Location;
PanelPaint.Invalidate();
}
ShapeObject shape = lstObject[lstObject.Count - 1];
if (shape is Circle circle)
{
if (circle.p2.X < circle.p1.X && circle.p2.Y < circle.p1.Y) // lên trái
{
circle.p2 = new Point(circle.p1.X - Math.Min(Math.Abs(circle.p2.X - circle.p1.X), Math.Abs(circle.p2.Y - circle.p1.Y)), circle.p1.Y
- Math.Min(Math.Abs(circle.p2.X - circle.p1.X), Math.Abs(circle.p2.Y - circle.p1.Y)));
}
if (circle.p2.X > circle.p1.X && circle.p2.Y > circle.p1.Y) // xuống phải
{
circle.p2 = new Point(circle.p1.X + Math.Min(Math.Abs(circle.p2.X - circle.p1.X), Math.Abs(circle.p2.Y - circle.p1.Y)), circle.p1.Y
+ Math.Min(Math.Abs(circle.p2.X - circle.p1.X), Math.Abs(circle.p2.Y - circle.p1.Y)));
}
if (circle.p2.X > circle.p1.X && circle.p2.Y < circle.p1.Y) // lên phải
{
circle.p2 = new Point(circle.p1.X + Math.Min(Math.Abs(circle.p2.X - circle.p1.X), Math.Abs(circle.p2.Y - circle.p1.Y)), circle.p1.Y
- Math.Min(Math.Abs(circle.p2.X - circle.p1.X), Math.Abs(circle.p2.Y - circle.p1.Y)));
}
if (circle.p2.X < circle.p1.X && circle.p2.Y > circle.p1.Y) // xuống trái
{
circle.p2 = new Point(circle.p1.X - Math.Min(Math.Abs(circle.p2.X - circle.p1.X), Math.Abs(circle.p2.Y - circle.p1.Y)), circle.p1.Y
+ Math.Min(Math.Abs(circle.p2.X - circle.p1.X), Math.Abs(circle.p2.Y - circle.p1.Y)));
}
}
}
catch
{
}
}
private void PanelPaint_MouseDown(object sender, MouseEventArgs e)
{
try
{
if (currentShape == CurrentShape.NoDrawing) // select
{
if (isControlKeyPress) // nhấn phím controls
{
for (int i = 0; i < lstObject.Count; i++)
{
if (lstObject[i].IsHit(e.Location))
{
lstObject[i].IsSelected = !lstObject[i].IsSelected;
PanelPaint.Invalidate();
break;
}
}
}
else
{
lstObject.ForEach(shape => shape.IsSelected = false);
lstObject.ForEach(shape => shape.IsResize = false);
PanelPaint.Invalidate();
for (int i = 0; i < lstObject.Count; i++)
{
if (lstObject[i].IsHit(e.Location) && PanelPaint.Cursor == Cursors.Hand)
{
selectedShape = lstObject[i];
lstObject[i].IsSelected = true;
lstObject[i].IsResize = false;
PanelPaint.Invalidate();
break;
}
}
for (int j = 0; j < lstObject.Count; j++)
{
if (lstObject[j].IsHitPoint(e.Location) && PanelPaint.Cursor == Cursors.SizeAll)
{
resizeShape = lstObject[j];
lstObject[j].IsResize = true;
lstObject[j].IsSelected = true;
PanelPaint.Invalidate();
break;
}
}
if (selectedShape != null || resizeShape != null)
{
if (selectedShape != null)
{
isMovingShape = true;
previousPoint = e.Location;
}
if (resizeShape != null)
{
isResizeShape = true;
}
}
else
{
isMouseSelect = true;
selectedRegion = new System.Drawing.Rectangle(e.Location, new Size(0, 0));
}
}
}
else
{
isMouseDown = true;
lstObject.ForEach(shape => shape.IsSelected = false);
if (currentShape == CurrentShape.Line)
{
Line myObj = new Line();
myObj.p1 = e.Location;
myObj.pen = new Pen(myColor, Convert.ToInt32(cblineWidth.SelectedItem));
myObj.pen.DashStyle = (DashStyle)cbDashMode.SelectedIndex;
lstObject.Add(myObj);
}
else if (currentShape == CurrentShape.Circle)
{
Circle myObj = new Circle();
myObj.p1 = e.Location;
myObj.pen = new Pen(myColor, Convert.ToInt32(cblineWidth.SelectedItem));
myObj.pen.DashStyle = (DashStyle)cbDashMode.SelectedIndex;
if (mode == ShapeMode.Fill)
{
myObj.Fill = true;
HatchStyle hs = (HatchStyle)Enum.Parse(typeof(HatchStyle),
comboBox1.SelectedItem.ToString(), true);
myObj.hatch = new HatchBrush(hs, forecolor.BackColor, bc.BackColor);
}
lstObject.Add(myObj);
}
else if (currentShape == CurrentShape.Ellipse)
{
Ellipse myObj = new Ellipse();
myObj.p1 = e.Location;
myObj.pen = new Pen(myColor, Convert.ToInt32(cblineWidth.SelectedItem));
myObj.pen.DashStyle = (DashStyle)cbDashMode.SelectedIndex;
myObj.hatch = new HatchBrush(HatchStyle.BackwardDiagonal, myColor);
if (mode == ShapeMode.Fill)
{
myObj.Fill = true;
HatchStyle hs = (HatchStyle)Enum.Parse(typeof(HatchStyle),
comboBox1.SelectedItem.ToString(), true);
myObj.hatch = new HatchBrush(hs, forecolor.BackColor, bc.BackColor);
}
lstObject.Add(myObj);
}
else if (currentShape == CurrentShape.Rectangle)
{
Rect myObj = new Rect();
myObj.p1 = e.Location;
myObj.pen = new Pen(myColor, Convert.ToInt32(cblineWidth.SelectedItem));
myObj.pen.DashStyle = (DashStyle)cbDashMode.SelectedIndex;
if (mode == ShapeMode.Fill)
{
myObj.Fill = true;
{
HatchStyle hs = (HatchStyle)Enum.Parse(typeof(HatchStyle),
comboBox1.SelectedItem.ToString(), true);
myObj.hatch = new HatchBrush(hs, forecolor.BackColor, bc.BackColor);
}
}
lstObject.Add(myObj);
}
else if (currentShape == CurrentShape.Arc)
{
Arc myObj = new Arc();
myObj.p1 = e.Location;
myObj.pen = new Pen(myColor, Convert.ToInt32(cblineWidth.SelectedItem));
myObj.pen.DashStyle = (DashStyle)cbDashMode.SelectedIndex;
myObj.start = float.Parse(start.Text.Trim());
myObj.sweep = float.Parse(sweep.Text.Trim());
lstObject.Add(myObj);
}
else if (currentShape == CurrentShape.Polygon)
{
if (!isDrawPolygon) // vẽ mới polygon
{
Polygon myObj = new Polygon();
myObj.pen = new Pen(myColor, Convert.ToInt32(cblineWidth.SelectedItem));
myObj.pen.DashStyle = (DashStyle)cbDashMode.SelectedIndex;
if (mode == ShapeMode.Fill)
{
myObj.Fill = true;
HatchStyle hs = (HatchStyle)Enum.Parse(typeof(HatchStyle),
comboBox1.SelectedItem.ToString(), true);
myObj.hatch = new HatchBrush(hs, forecolor.BackColor, bc.BackColor);
}
myObj.Points.Add(e.Location); // add 2 tọa độ để vẽ
myObj.Points.Add(e.Location);
lstObject.Add(myObj);
isDrawPolygon = true;
}
else
{
Polygon polygon = lstObject[lstObject.Count - 1] as Polygon;
polygon.Points[polygon.Points.Count - 1] = e.Location;
polygon.Points.Add(e.Location);
}
isMouseDown = false;
}
}
}
catch
{
}
}
