Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Trigger Pixel Change on Screen and do something

Posted on 2009-04-06
1
Medium Priority
?
298 Views
Last Modified: 2013-12-17
Hi @ all

GetColor allows me to retrieve the color of any pixel on the screen

Now i attempt to solve out how to trigger an action whenever the pixel color of X,Y-coordinates anywhere on screen changes. This should stop the methode RunApp() and start again.

Thanks in advance!
public Color GetColor(int x, int y)
{
	Bitmap b = new Bitmap(1, 1);
	Graphics g = Graphics.FromImage(b);
	g.CopyFromScreen(x, y, 0, 0, b.Size);
	g.Dispose();
	Color c = b.GetPixel(0, 0);
	b.Dispose();
 
	return c;
}
public void RunApp()
{	
	if (comboBoxPlatzAmTisch.Text == "")
	{
			MessageBox.Show("Geben Sie Ihren Platz am Tisch an!");
	}
	else
	{
		Color sResult = GetColor(iKartenPositionen[i, 0], iKartenPositionen[i, 1]);
		sResult = KarteVorhanden();
		if (sResult == true)	
		{
			ScreenshotSpieler(iSpielerPlatz);			
			bool fAktiv = GetPixelColor();
			if (fAktiv == true){
				//here follows more nested if statements}
		}
		else
		{
			Pockal.Clear();
			Tisch.Clear();
			Gegner.SelectedIndex = 0;
		}
	}	
}

Open in new window

0
Comment
Question by:pekabo
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 3

Accepted Solution

by:
pekabo earned 0 total points
ID: 24106342
Unfortunately, no answer.
A solution for my problem could looks like this (it works for me)

i use backgroundWorker (DoWork, RunWorkerCompleted, ProgressChanged)
i made a do while loop if the color of the pixel like the color in Color it returns a true
this will stop the Loop. Now i can ask is backgroundPL1.IsBusy = true, NO Pixel Changed
if backgroundPL1.IsBusy = false the color of the pixel Cahnged

see Code Snippet below.

p.s.: please refund the points, i wont´t delete this message, because other could maybe learn from it
private void backgroundPL1_DoWork(object sender, DoWorkEventArgs e, Color ColorName)
{
int i = 1;
 
	if ((workerPL8.CancellationPending == true))
	{		
		return;
	}
	else
	{
		bool a = false;
		do
		{
			Bitmap b = new Bitmap(1, 1);
			Graphics g = Graphics.FromImage(b);
			g.CopyFromScreen(x, y, 0, 0, b.Size);
			g.Dispose();
			Color c = b.GetPixel(0, 0);
			b.Dispose();
			if (c.Name != ColorName) a = true;
			if (i > 100) i = 1;
			
			workerPL8.ReportProgress(i);			
					
			Thread.Sleep(1);
			//Keep UI messages moving, so the form remains 
                        //responsive during the asynchronous operation.	
			Application.DoEvents();
			
			i++;
		} while (a == false);
	}
}

Open in new window

0

Featured Post

 [eBook] Windows Nano Server

Download this FREE eBook and learn all you need to get started with Windows Nano Server, including deployment options, remote management
and troubleshooting tips and tricks

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

For those of you who don't follow the news, or just happen to live under rocks, Microsoft Research released a beta SDK (http://www.microsoft.com/en-us/download/details.aspx?id=27876) for the Xbox 360 Kinect. If you don't know what a Kinect is (http:…
A long time ago (May 2011), I have written an article showing you how to create a DLL using Visual Studio 2005 to be hosted in SQL Server 2005. That was valid at that time and it is still valid if you are still using these versions. You can still re…
Monitoring a network: how to monitor network services and why? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the philosophy behind service monitoring and why a handshake validation is critical in network monitoring. Software utilized …
Visualize your data even better in Access queries. Given a date and a value, this lesson shows how to compare that value with the previous value, calculate the difference, and display a circle if the value is the same, an up triangle if it increased…

705 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question