private void pictureBox1_Paint(object sender, PaintEventArgs e)
{
Pen pen = GetPen();
Graphics mainGraphics = Graphics.FromImage(canvas);
Graphics blockGraphics = Graphics.FromImage(blockCanvas);
if (!isDraw) // Рисовать курсор
{
blockGraphics.Clear(Color.White);
switch (mode)
{
case Mode.Pencil:
case Mode.Eraser:
{
blockGraphics.DrawEllipse(new Pen(new SolidBrush(Color.Black)), new Rectangle(X - (int)(Convert.ToInt32(Convert.ToDouble(BrushSize.Value) * ScaleFactor) / 2), Y - (int)(Convert.ToInt32(Convert.ToDouble(BrushSize.Value) * ScaleFactor) / 2), (int)Convert.ToInt32(Convert.ToDouble(BrushSize.Value) * ScaleFactor), (int)Convert.ToInt32(Convert.ToDouble(BrushSize.Value) * ScaleFactor)));
break;
}
case Mode.Rectangle:
case Mode.Ellipse:
case Mode.Triangle:
case Mode.Line:
case Mode.Bucket:
{
blockGraphics.DrawLine(new Pen(new SolidBrush(Color.Black)), new Point(X - 4, Y), new Point(X + 4, Y));
blockGraphics.DrawLine(new Pen(new SolidBrush(Color.Black)), new Point(X, Y - 4), new Point(X, Y + 4));
break;
}
}
if (mode != Mode.None)
{
blockGraphics.DrawImage(canvas, 0, 0);
pictureBox1.Image = blockCanvas;
}
}
else // Рисвать сами объекты
{
switch (mode)
{
case Mode.Pencil:
{
mainGraphics.DrawLine(pen, endX, endY, X, Y);
pictureBox1.Image = canvas;
break;
}
case Mode.Line:
{
blockGraphics.Clear(Color.White);
blockGraphics.DrawImage(canvas, 0, 0);
blockGraphics.DrawLine(pen, endClickX, endClickY, X, Y);
pictureBox1.Image = blockCanvas;
break;
}
case Mode.Eraser:
{
mainGraphics.DrawLine(GetPen(Color.White), endX, endY, X, Y);
pictureBox1.Image = canvas;
break;
}
case Mode.Rectangle:
{
blockGraphics.Clear(Color.White);
blockGraphics.DrawImage(canvas, 0, 0);
int x, y;
x = endClickX;
y = endClickY;
if (x > X)
{
x = X;
}
if (y > Y)
{
y = Y;
}
blockGraphics.DrawRectangle(pen, x, y, Math.Abs(X - endClickX), Math.Abs(Y - endClickY));
pictureBox1.Image = blockCanvas;
break;
}
case Mode.Ellipse:
{
blockGraphics.Clear(Color.White);
blockGraphics.DrawImage(canvas, 0, 0);
blockGraphics.DrawEllipse(pen, endClickX, endClickY, X - endClickX, Y - endClickY);
pictureBox1.Image = blockCanvas;
break;
}
case Mode.Triangle:
{
blockGraphics.Clear(Color.White);
blockGraphics.DrawImage(canvas, 0, 0);
Point a = new Point((X + endClickX) / 2, endClickY);
Point b = new Point(endClickX, Y);
Point c = new Point(X, Y);
blockGraphics.DrawPolygon(pen, new Point[] { a, b, c });
pictureBox1.Image = blockCanvas;
break;
}
}
}
endX = X;
endY = Y;
}