/// <summary>
/// Draws a shadow around a rectangle.
/// </summary>
/// <param name="g">The current Graphics handle.</param>
/// <param name="origin">The rectangle which should have a shadow.</param>
/// <param name="startAngle">The start angle.</param>
/// <param name="sweepAngle">The sweep angle.</param>
/// <param name="color">The color of the shadow.</param>
/// <param name="dx">The horizontal shift.</param>
/// <param name="dy">The vertical shift.</param>
/// <param name="blur">The blurness.</param>
public static void DrawPieShadow(this System.Drawing.Graphics g, Rectangle origin, float startAngle, float sweepAngle, Color color, float dx, float dy, float blur)
{
var gp = new GraphicsPath();
gp.AddPie(origin, startAngle, sweepAngle);
if (gp.PointCount > 0)
{
g.DrawShadow(gp, color, dx, dy, blur);
}
}
/// <summary>
/// Draws a shadow around a rectangle.
/// </summary>
/// <param name="g">The current Graphics handle.</param>
/// <param name="origin">The rectangle which should have a shadow.</param>
/// <param name="color">The color of the shadow.</param>
/// <param name="dx">The horizontal shift.</param>
/// <param name="dy">The vertical shift.</param>
/// <param name="blur">The blurness.</param>
public static void DrawCircularShadow(this System.Drawing.Graphics g, RectangleF origin, Color color, float dx, float dy, float blur)
{
var gp = new GraphicsPath();
gp.AddEllipse(origin);
if (gp.PointCount > 0)
{
g.DrawShadow(gp, color, dx, dy, blur);
}
}
/// <summary>
/// An event handler called when drawing the annotation on the specified graphics object.
/// </summary>
/// <param name="graphics">The graphics object.</param>
protected override void OnDraw(Graphics graphics)
{
// Call the base class method.
base.OnDraw(graphics);
// If the message is not visible, do nothing.
if (!this.Visible) return;
// Use a normal smoothing mode.
graphics.SmoothingMode = SmoothingMode.Default;
// Create the pen.
using (Pen pen = new Pen(this.borderColor))
{
// Create the brush.
using (SolidBrush brush = new SolidBrush(this.backgroundColor))
{
// Draw the shadow.
graphics.DrawShadow(this.shadow, this.BorderRectangle);
// Draw the rectangle.
graphics.FillRectangle(brush, this.BorderRectangle);
// Draw the border.
graphics.DrawRectangle(pen, this.BorderRectangle);
}
}
// Display a message.
TextRenderer.DrawText(graphics, this.text, this.font, this.BorderRectangle, this.textColor, TextFormatFlags.HorizontalCenter | TextFormatFlags.VerticalCenter);
}
// Protected methods.
/// <summary>
/// An event handler called when drawing the annotation on the specified graphics object.
/// </summary>
/// <param name="graphics">The graphics object.</param>
protected override void OnDraw(Graphics graphics)
{
// If the message is not visible, do nothing.
if (!this.Visible) return;
// Use a normal smoothing mode.
graphics.SmoothingMode = SmoothingMode.HighQuality;
// Create the pen.
using (Pen pen = new Pen(this.BorderColor))
{
// Create the brush.
using (SolidBrush brush = new SolidBrush(this.BackgroundColor))
{
// Draw the shadow.
graphics.DrawShadow(this.Shadow, this.textRectangle);
// Draw the polygon.
graphics.FillPolygon(brush, this.polygon);
// Draw the border.
graphics.DrawPolygon(pen, this.polygon);
}
}
// Display a message.
TextRenderer.DrawText(graphics, this.Text, this.Font, this.textRectangle, this.TextColor, TextFormatFlags.HorizontalCenter | TextFormatFlags.VerticalCenter);
}
protected static void DrawText(Graphics g, Rectangle rect, string text, ContentAlignmentEx alignment, bool multiline, Font font, Color color, Color shadow, ShadowMask mask)
{
if (multiline == false)
{
var rc = alignment.CalcTextRect(g.MeasureString(text, font), rect);
if (mask != ShadowMask.None)
{
g.DrawShadow(text, font, shadow, rc.X, rc.Y, mask);
}
using (var brush = new SolidBrush(color))
{
g.DrawString(text, font, brush, rc.X, rc.Y);
}
}
else
{
var texts = g.GetMultilineText(text, font, rect.Width);
var textSize = g.CalcMultilineTextSize(texts, font);
var rc = alignment.CalcTextRect(textSize, rect);
using (var brush = new SolidBrush(color))
{
var top = rc.Top;
foreach (var line in texts)
{
var size = g.MeasureString(String.IsNullOrEmpty(line) ? " " : line, font);
var rcLine = alignment.CalcTextRect(size, rc.Left, top, rc.Width, size.Height);
if (mask != ShadowMask.None)
{
g.DrawShadow(text, font, shadow, rcLine.X, rcLine.Y, mask);
}
g.DrawString(line, font, brush, rcLine.X, rcLine.Y);
top += rcLine.Height;
}
}
}
}
/// <summary>
/// Draws a shadow around a rectangle.
/// </summary>
/// <param name="g">The current Graphics handle.</param>
/// <param name="path">The path which should have a shadow.</param>
/// <param name="color">The color of the shadow.</param>
/// <param name="shift">The horizontal and vertical shift.</param>
/// <param name="blur">The blurness.</param>
public static void DrawShadow(this System.Drawing.Graphics g, GraphicsPath path, Color color, PointF shift, float blur)
{
g.DrawShadow(path, color, shift.X, shift.Y, blur);
}
