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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.Workflow.ComponentModel.Design
{
using System;
using System.Collections.Generic;
using System.Text;
using System.Workflow.ComponentModel.Design;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Runtime.InteropServices;
// <summary>
// This class provides the visualisation of the backdrop + hightlighted designer when
// in highlight view.
// </summary>
[ComVisible(false)]
internal class HighlightOverlayGlyph : DesignerGlyph
{
private Rectangle bounds;
private List<ActivityDesigner> highlightedDesigners;
public HighlightOverlayGlyph(Rectangle bounds, List<ActivityDesigner> highlightedDesigners)
{
this.HighlightedDesigners = highlightedDesigners;
this.Bounds = bounds;
}
public Rectangle Bounds
{
get { return bounds; }
set { bounds = value; }
}
public List<ActivityDesigner> HighlightedDesigners
{
get { return highlightedDesigners; }
set { highlightedDesigners = value; }
}
protected override void OnPaint(Graphics graphics, bool activated, AmbientTheme ambientTheme, ActivityDesigner designer)
{
Rectangle frameRect = Bounds;
Rectangle shadowRect = frameRect;
Color BaseColor = Color.FromArgb(150, 0, 0, 0); // dark semitransparent backdrop
Color LightingColor = Color.FromArgb(150, 0, 0, 0);
Brush frameBrush = new LinearGradientBrush(new Point(frameRect.Left, frameRect.Top), new Point(frameRect.Left, frameRect.Bottom), BaseColor, LightingColor);
shadowRect = DropRoundedRectangleShadow(shadowRect, graphics);
graphics.FillPath(frameBrush, RoundedRect(frameRect));
graphics.SmoothingMode = SmoothingMode.HighQuality;
graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
foreach (ActivityDesigner highlightedDesigner in HighlightedDesigners)
{
DesignerPainter.PaintDesigner(highlightedDesigner, new ActivityDesignerPaintEventArgs(graphics, designer.Bounds, designer.Bounds, null));
}
}
private Rectangle DropRoundedRectangleShadow(Rectangle shadowRect, Graphics outputGraphics)
{
int shadowIntensity = 1;
using (Pen shadowPen = new Pen(Color.FromArgb(shadowIntensity, 0, 0, 0)))
{
shadowPen.Width = 24;
for (int i = 0; i < 12; i++)
{
outputGraphics.DrawPath(shadowPen, RoundedRect(shadowRect));
shadowPen.Color = Color.FromArgb(shadowIntensity - 1, 0, 0, 0);
shadowIntensity += 2;
shadowPen.Width = shadowPen.Width - 2;;
}
return shadowRect;
}
}
private GraphicsPath RoundedRect(Rectangle frame)
{
GraphicsPath path = new GraphicsPath();
int radius = 1;
int diameter = radius * 2;
Rectangle arc = new Rectangle(frame.Left, frame.Top, diameter, diameter);
path.AddArc(arc, 180, 90);
arc.X = frame.Right - diameter;
path.AddArc(arc, 270, 90);
arc.Y = frame.Bottom - diameter;
path.AddArc(arc, 0, 90);
arc.X = frame.Left;
path.AddArc(arc, 90, 90);
path.CloseFigure();
return path;
}
}
}
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