public override (bool canBeDone, OutLinkButton, InLinkButton) StartLink(int xMouse, int yMouse)
{
if (OutLinkLeft.LinkedTo == null && OutLinkLeft.IsUnderMouse(xMouse, yMouse))
{
return(true, OutLinkLeft, InLink);
}
if (OutLinkRight.LinkedTo == null && OutLinkRight.IsUnderMouse(xMouse, yMouse))
{
return(true, OutLinkRight, InLink);
}
return(false, null, null);
}
private void ImageDrawing(Bitmap srcBitmap, PictureBox srcPictureBox, bool isDashed)
{
if (InLink.LinkedTo != null)
{
InLink.ClearLinkButton(srcBitmap, srcPictureBox);
}
if (OutLinkLeft.LinkedTo != null)
{
OutLinkLeft.ClearLinkButton(srcBitmap, srcPictureBox);
}
if (OutLinkRight.LinkedTo != null)
{
OutLinkRight.ClearLinkButton(srcBitmap, srcPictureBox);
}
Graphics graphics = Graphics.FromImage(srcBitmap);
graphics.FillPolygon(Brushes.White, this.GetPointsArray());
Pen pen = new Pen(Color.Black, 2);
pen.Alignment = PenAlignment.Inset;
if (isDashed)
{
float[] dashValues = { 5, 5 };
pen.DashPattern = dashValues;
}
graphics.DrawPolygon(pen, this.GetPointsArray());
StringFormat sf = new StringFormat();
sf.Alignment = StringAlignment.Center;
sf.LineAlignment = StringAlignment.Center;
graphics.DrawString(this.Text, new Font("Tahoma", 8), Brushes.Black,
new Rectangle(MiddlePoint.X - 3 * (rightPoint.X - leftPoint.X) / 8, MiddlePoint.Y - 3 * (bottomPoint.Y - topPoint.Y) / 8,
6 * (rightPoint.X - leftPoint.X) / 8, 6 * (bottomPoint.Y - topPoint.Y) / 8),
sf);
graphics.DrawString("T", new Font("Tahoma", 12), Brushes.Black, new Rectangle(leftPoint.X - 15, leftPoint.Y - 15, 15, 15), sf);
graphics.DrawString("F", new Font("Tahoma", 12), Brushes.Black, new Rectangle(rightPoint.X, rightPoint.Y - 15, 15, 15), sf);
if (OutLinkLeft.LinkedTo != null)
{
LinkButton.DrawLinkOutToIn(OutLinkLeft.startLinkPoint, OutLinkLeft.LinkedTo.endLinkPoint, srcBitmap, srcPictureBox);
}
else
{
OutLinkLeft.DrawLinkButton(srcBitmap, srcPictureBox);
}
if (OutLinkRight.LinkedTo != null)
{
LinkButton.DrawLinkOutToIn(OutLinkRight.startLinkPoint, OutLinkRight.LinkedTo.endLinkPoint, srcBitmap, srcPictureBox);
}
else
{
OutLinkRight.DrawLinkButton(srcBitmap, srcPictureBox);
}
if (InLink.LinkedTo != null)
{
LinkButton.DrawLinkOutToIn(InLink.LinkedTo.startLinkPoint, InLink.endLinkPoint, srcBitmap, srcPictureBox);
}
else
{
InLink.DrawLinkButton(srcBitmap, srcPictureBox);
}
srcPictureBox.Invalidate();
}
