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An Introduction to the Silverlight samples in the All-In-One Framework

, 12 Dec 2009
This article introduces several Silverlight samples in the All-In-One Framework.
SilverlightIntroduction_src.zip
CSSL3LocalMessage
Properties
CSSL3MediaElement
CSSL3MediaElement
Properties
CSSL3MediaElement.Web
App_Data
ClientBin
CSSL3MediaElement.xap
Properties
ReadMe.mht
CSSL3PixelShader
cyclewatery.ps
Humpback Whale.jpg
Properties
CSSL3WriteableBitmap
Heart Empty.png
Properties
VBSL3Animation
My Project
VBSL3DeepZoom
VBSL3DeepZoom
images
home_hover.png
home_pressed.png
home_rest.png
My Project
Service References
DeepZoomServiceReference
configuration.svcinfo
configuration91.svcinfo
GenerateDeepZoomService.disco
GenerateDeepZoomService.wsdl
Reference.svcmap
ServiceReferences.ClientConfig
VBSL3DeepZoom.Web
App_Code
App_Data
Bin
DeepZoomTools.DLL
DeepZoomTools.DLL.refresh
ClientBin
GeneratedImages
GenerateDeepZoomService.svc
SourceImages
atom.png
background.jpg
cell.png
dna.png
Molecular.png
neutron.png
seed.png
wrap in bamboo.png
VBSL3HTMLBridge
VBSL3HTMLBridge
My Project
VBSL3HTMLBridge.Web
App_Data
ClientBin
VBSL3HTMLBridge.xap
My Project
Application.myapp
MyExtensions
Settings.settings
VBSL3Input
My Project
VBSL3LocalMessage
My Project
VBSL3MediaElement
ReadMe.mht
VBSL3MediaElement
My Project
VBSL3MediaElement.Web
App_Data
ClientBin
VBSL3MediaElement.xap
My Project
Application.myapp
MyExtensions
Settings.settings
VBSL3PixelShader
cyclewatery.ps
Humpback Whale.jpg
My Project
CSSL3Animation
Properties
CSSL3DeepZoom
CSSL3DeepZoom
images
home_hover.png
home_pressed.png
home_rest.png
Properties
Service References
DeepZoomServiceReference
configuration.svcinfo
configuration91.svcinfo
GenerateDeepZoomService.disco
GenerateDeepZoomService.wsdl
GenerateDeepZoomService1.wsdl
Reference.svcmap
ServiceReferences.ClientConfig
CSSL3DeepZoom.Web
App_Code
Bin
DeepZoomTools.DLL
DeepZoomTools.DLL.refresh
ClientBin
GeneratedImages
GenerateDeepZoomService.svc
SourceImages
atom.png
background.jpg
cell.png
dna.png
Molecular.png
neutron.png
seed.png
wrap in bamboo.png
ReadMe.mht
CSSL3HTMLBridge
CSSL3HTMLBridge
Properties
CSSL3HTMLBridge.Web
App_Data
ClientBin
CSSL3HTMLBridge.xap
Properties
CSSL3Input
Properties
/****************************** Module Header ******************************\
* Module Name:  FillColor.cs
* Project:      CSSL3WriteableBitmap
* Copyright (c) Microsoft Corporation.
* 
* This example implements a common feature in painting programmers: Fill an area with a solid color. It demonstrates how to apply common algorithms to Silverlight WriteableBitmap, as well as how to avoid stack overflow in very deep recursive methods by simulating the way CLR invokes methods.
* 
* This source is subject to the Microsoft Public License.
* See http://www.microsoft.com/opensource/licenses.mspx#Ms-PL.
* All other rights reserved.
* 
* History:
* * 9/15/2009 19:47 Yilun Luo Created
\***************************************************************************/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Media.Imaging;

namespace CSSL3WriteableBitmap
{
	public partial class FillColor : UserControl
	{
		private BitmapSource _source = new BitmapImage(new Uri("Heart Empty.png", UriKind.Relative));
		private int _newColor;

		public FillColor()
		{
			InitializeComponent();
		}

		private void UserControl_Loaded(object sender, RoutedEventArgs e)
		{
			img.Source = _source;
		}

		private void img_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
		{
			WriteableBitmap bmp = new WriteableBitmap(_source);
			//Start from the clicked point.
			Point clickedPoint = e.GetPosition(img);
			//The position of the clicked point in the pixel array.
			int clickedColorPosition = bmp.PixelWidth * (int)clickedPoint.Y + (int)clickedPoint.X;
			//The color of the clicked point.
			int clickedColor = bmp.Pixels[clickedColorPosition];
			//Get the value of the new color from the sliders.
			this._newColor = ((int)this.alphaSlider.Value << 24) + ((int)this.redSlider.Value << 16) + ((int)this.greenSlider.Value << 8) + (int)this.blueSlider.Value;
			//The clicked point is already in the new color. Terminate the algorithm.
			if (clickedColor == this._newColor)
			{
				return;
			}
			//Paint the clicked point with the new color.
			bmp.Pixels[clickedColorPosition] = this._newColor;
			this.EdgeDetect(clickedPoint, clickedColorPosition, clickedColor, bmp);
			this._source = bmp;
			this.img.Source = bmp;
		}

		/// <summary>
		/// Implement the edge detect algorithm.
		/// </summary>
		/// <param name="clickedPoint">The clicked point.</param>
		/// <param name="clickedColorPosition">The clicked point's postion in the pixel array.</param>
		/// <param name="clickedColor">The clicked point's color.</param>
		/// <param name="bmp">The WriteableBitmap.</param>
		private void EdgeDetect(Point clickedPoint, int clickedColorPosition, int clickedColor, WriteableBitmap bmp)
		{
			//For large images, you may get stack overflow if you use a recursive method. So let's manually walk through the "call stack" instead.
			Stack<ParameterData> stack = new Stack<ParameterData>();
			//Think ParameterData is the parameter you pass to the recursive method. CLR will store all parameters on the call stack. Let's do the same.
			stack.Push(new ParameterData()
			{
				bmp = bmp,
				centerColorPosition = clickedColorPosition,
				centerPoint = clickedPoint
			});
			//The call stack is larger than 0. So more methods must be invoked.
			while (stack.Count > 0)
			{
				//The first step in executing a method is to pop the parameter from the call stack.
				ParameterData pd = stack.Pop();

				//Left
				if (pd.centerPoint.X >= 1)
				{
					Point leftPoint = new Point(pd.centerPoint.X - 1, pd.centerPoint.Y);
					int leftColorPosition = pd.centerColorPosition - 1;
					//Is the left point's color the same as the clicked point's color? If so, paint the left point with the new color. Otherwise, we don't need to continue left any more.
					if (bmp.Pixels[leftColorPosition] == clickedColor)
					{
						bmp.Pixels[leftColorPosition] = this._newColor;
						//Create a new parametar, push it to the call stack, so another method will be "invoked".
						ParameterData pdLeft = new ParameterData()
						{
							bmp = bmp,
							centerColorPosition = leftColorPosition,
							centerPoint = leftPoint
						};
						stack.Push(pdLeft);
					}
				}

				//Right
				if (pd.centerPoint.X <= bmp.PixelWidth - 2)
				{
					Point rightPoint = new Point(pd.centerPoint.X + 1, pd.centerPoint.Y);
					int rightColorPosition = pd.centerColorPosition + 1;
					if (bmp.Pixels[rightColorPosition] == clickedColor)
					{
						bmp.Pixels[rightColorPosition] = this._newColor;
						ParameterData pdRight = new ParameterData()
						{
							bmp = bmp,
							centerColorPosition = rightColorPosition,
							centerPoint = rightPoint
						};
						stack.Push(pdRight);
					}
				}

				//Top
				if (pd.centerPoint.Y >= 1)
				{
					Point topPoint = new Point(pd.centerPoint.X, pd.centerPoint.Y - 1);
					int topColorPosition = pd.centerColorPosition - bmp.PixelWidth;
					if (bmp.Pixels[topColorPosition] == clickedColor)
					{
						bmp.Pixels[topColorPosition] = this._newColor;
						ParameterData pdTop = new ParameterData()
						{
							bmp = bmp,
							centerColorPosition = topColorPosition,
							centerPoint = topPoint
						};
						stack.Push(pdTop);
					}
				}

				//Bottom
				if (pd.centerPoint.Y <= bmp.PixelHeight - 2)
				{
					Point bottomPoint = new Point(pd.centerPoint.X, pd.centerPoint.Y + 1);
					int bottomColorPosition = pd.centerColorPosition + bmp.PixelWidth;
					if (bmp.Pixels[bottomColorPosition] == clickedColor)
					{
						bmp.Pixels[bottomColorPosition] = this._newColor;
						ParameterData pdBottom = new ParameterData()
						{
							bmp = bmp,
							centerColorPosition = bottomColorPosition,
							centerPoint = bottomPoint
						};
						stack.Push(pdBottom);
					}
				}
			}
		}

		private void ColorSliderValueChanged(object sender, System.Windows.RoutedPropertyChangedEventArgs<double> e)
		{
			if (this.fillColorRectangle != null)
			{
				this.fillColorRectangle.Fill = new SolidColorBrush(Color.FromArgb((byte)this.alphaSlider.Value, (byte)this.redSlider.Value, (byte)this.greenSlider.Value, (byte)this.blueSlider.Value));
			}
		}
	}

	/// <summary>
	/// Use this class to simulate the paramater of a recursive method on the CLR call stack.
	/// </summary>
	public class ParameterData
	{
		//The current (center) point.
		public Point centerPoint;
		//The current point's position in the pixel array.
		public int centerColorPosition;
		public WriteableBitmap bmp;
	}
}

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This article, along with any associated source code and files, is licensed under The Microsoft Public License (Ms-PL)

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Microsoft All-In-One Code Framework delineates the framework and skeleton of Microsoft development techniques through typical sample codes in three popular programming languages (Visual C#, VB.NET, Visual C++). Each sample is elaborately selected, composed, and documented to demonstrate one frequently-asked, tested or used coding scenario based on our support experience in MSDN newsgroups and forums. If you are a software developer, you can fill the skeleton with blood, muscle and soul. If you are a software tester or a support engineer like us, you may extend the sample codes a little to fit your specific test scenario or refer your customer to this project if the customer's question coincides with what we collected.
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