private void SetArrowHeads(ArrowHeadCombination heads, Pen pen)
{
if (heads == ArrowHeadCombination.BOTH || heads == ArrowHeadCombination.START_POINT)
{
pen.CustomStartCap = ARROW_CAP;
}
if (heads == ArrowHeadCombination.BOTH || heads == ArrowHeadCombination.END_POINT)
{
pen.CustomEndCap = ARROW_CAP;
}
}
public override void Draw(Graphics graphics, RenderMode rm)
{
int lineThickness = GetFieldValueAsInt(FieldType.LINE_THICKNESS);
bool shadow = GetFieldValueAsBool(FieldType.SHADOW);
if (lineThickness > 0)
{
graphics.SmoothingMode = SmoothingMode.HighQuality;
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphics.CompositingQuality = CompositingQuality.HighQuality;
graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
Color lineColor = GetFieldValueAsColor(FieldType.LINE_COLOR);
ArrowHeadCombination heads = (ArrowHeadCombination)GetFieldValue(FieldType.ARROWHEADS);
if (shadow)
{
//draw shadow first
int basealpha = 100;
int alpha = basealpha;
int steps = 5;
int currentStep = 1;
while (currentStep <= steps)
{
using (Pen shadowCapPen = new Pen(Color.FromArgb(alpha, 100, 100, 100))) {
shadowCapPen.Width = lineThickness;
SetArrowHeads(heads, shadowCapPen);
graphics.DrawLine(shadowCapPen,
this.Left + currentStep,
this.Top + currentStep,
this.Left + currentStep + this.Width,
this.Top + currentStep + this.Height);
currentStep++;
alpha = alpha - (basealpha / steps);
}
}
}
using (Pen pen = new Pen(lineColor)) {
pen.Width = lineThickness;
if (pen.Width > 0)
{
SetArrowHeads(heads, pen);
graphics.DrawLine(pen, this.Left, this.Top, this.Left + this.Width, this.Top + this.Height);
}
}
}
}
private void SetArrowHeads(ArrowHeadCombination heads, Pen pen)
{
if ( heads == ArrowHeadCombination.BOTH || heads == ArrowHeadCombination.START_POINT ) {
pen.CustomStartCap = ARROW_CAP;
}
if ( heads == ArrowHeadCombination.BOTH || heads == ArrowHeadCombination.END_POINT ) {
pen.CustomEndCap = ARROW_CAP;
}
}
