Nice Tracking…

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First attempt [at the end failed] was to build a Controller for dragging headers, and it was working, but I cannot find a nice way to call column Swap and redraw header under mouse without changing more code that I was think it was a good code.
If I write too much code to do simple task, there’s a voice in me that tell me I’m wrong on what I’ve done.

So, trashed all tests, I prefer to keep original code “as is” and inherit original object:

* override OnMouseDown and save dragged column header
* override OnMouseMove to set destination column header by moving pointer
* override OnMouseUp to set final destination column header
* override OnPaint to redraw destination column header by moving pointer with a nice veil of transparent white

here a snapshot of result:

and here is the code:

using System;
using System.Drawing;

namespace SourceGrid_ColumnDragNSwap
{
    public class SourceGrid_ColumnDragNSwap:SourceGrid.DataGrid
    {
        int draggingColumn = -1;
        int targetColumn = -1;
        protected override void OnMouseDown(System.Windows.Forms.MouseEventArgs e)
        {
            base.OnMouseDown(e);

            draggingColumn = -1;
            if (e.Button == System.Windows.Forms.MouseButtons.Left)
                if (this.MouseCellPosition.Row == 0) // header
                    draggingColumn = this.MouseCellPosition.Column;
        }

        protected override void OnMouseMove(System.Windows.Forms.MouseEventArgs e)
        {
            base.OnMouseMove(e);
            if (draggingColumn != -1)
            {
                int newTargetColumn = this.PositionAtPoint(e.Location).Column;
                if (targetColumn != newTargetColumn)
                {
                    targetColumn = newTargetColumn;
                    // Invalidate to redraw all header cells
                    if (targetColumn != -1) this.InvalidateRange(new SourceGrid.Range(0, 0, 0, this.Columns.Count - 1));
                }
            }
        }

        protected override void OnMouseUp(System.Windows.Forms.MouseEventArgs e)
        {
            base.OnMouseUp(e);

            if (draggingColumn != -1)
            {
                targetColumn = this.PositionAtPoint(e.Location).Column;
                if (targetColumn != -1)
                {
                    //Swap Columns
                    if (targetColumn != draggingColumn) this.Columns.Swap(targetColumn, draggingColumn);
                    targetColumn = -1;
                }
                draggingColumn = -1;
            }
        }

        private Brush whiteVeilBrush = new SolidBrush(Color.FromArgb(150, Color.White));
        private Rectangle cellVeilRectangle = new Rectangle();
        protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
        {
            base.OnPaint(e);
            //Paint over target header cell a white veil
            if (draggingColumn != -1 && targetColumn != -1 && draggingColumn != targetColumn)
            {
                Rectangle currentCellRectangle = this.PositionToRectangle(new SourceGrid.Position(0, targetColumn));
                cellVeilRectangle.X = currentCellRectangle.X;
                cellVeilRectangle.Y = currentCellRectangle.Y;
                cellVeilRectangle.Width = currentCellRectangle.Width - 2;
                cellVeilRectangle.Height = currentCellRectangle.Height - 1;
                e.Graphics.FillRectangle(whiteVeilBrush, cellVeilRectangle);
            }
        }
    }
}

My source with test project is here

This work is based on SourceGrid:
Last source on https://bitbucket.org/dariusdamalakas/sourcegrid
Main site is http://sourcegrid.codeplex.com/

A great thing about SourceGrid, that’s all C# managed code, I want to try to see what happens on Mono…

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* HP Deskjet 1280 on USB on a Windows XP machine
* Windows 7 machine
* We want to share HP Deskjet 1280 and use from Windows 7 machine

the thing seems very simple, but at the end seem really impossible, and finally a compromise that works

so, let go by step, I want to tell you all story:

First “What The Hell” Path and Fail
* activate printer share in Windows XP
* browse network from Windows 7
* find our shared printer
* double click to install
* Windows 7 says it has no driver
* uhm
* Yeah, it’s simple, let’s click Windows Update to check new driver availability … hours of waiting
* No driver again
* uhm
* Well, let’s go to HP web site, navigate to HP support web site and download manually drivers for HP Deskjet 1280
* web site says that the driver is included in Windows 7, no manual download available
* and now?

Second “What The Hell” Path and Fail
* Create a fake printer in Windows XP for a ipotetic HP LaserJet 4 (Windows 7 has drivers for this)
* Share calling it “HPFake”
* From Windows 7 install “HPFake” share on Windows XP
* On Windows XP rename printer shares, “HPReal” to “HPFake” and “HPFake” to “HPReal”
* You are mine Winzoz!
* Go to Windows 7 and test printer
* But, what? Windows 7 switch automagically share to “HPReal”
* Damn! No way.. I need a new idea… and to buy a new printer?… uhmm

Third “What The Hell” Path and Final Solution
* A thing you have to know is that HP DeskJet 1280 has a compatible driver… and the driver is… HP DeskJet 1220C
* And Windows 7 has this driver
* So in Windows XP add another printer temporally on LPT1 with HP DeskJet 1220C driver
* Modify port on printer and choose USB port used by original installed printer, in order to share USB port with two printers
* Activate sharing
* Go to Windows 7 and install printer
* Do a test print, OK
* … Microsoft + HP = …

See you on next post

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I have some VMs with VirtualBox, I use to run nullfile-1.02.exe by Matthias Jordan in order to clear unused sectors with a VBoxManage compact.

It’s a good tool, but I want to know more infos, first of all, when app thinks to finish to wipe?
I remember to see nullfile sources in pascal, great language, I want to thanks Matthias Jordan because he shares it.

I need a faster application to do this work…
… Think .NET …
So I decide to write a very similar command line app, with some new statistical features:

Download NullFileNET source and binary (.exe), and here only binary (.exe).

I can resume code lines that do the work in:

string filename = "appleapplebananacoffee";
byte[] bArray = new byte[1024];
FileStream zeroingFile = File.Create(filename, 1024, FileOptions.DeleteOnClose);
while (true)
   zeroingFile.Write(bArray, 0, 1024);

Have a good 2011!!!

P.S.: There is a thing I’ve not understand, when process finish, it seems to throw an ex on a lower level than main call, but I think it’s because of low disk space; when I have another slice of time I’ll try to solve this.

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Kernel panic - not syncing: VFS: Unable to mount root fs on unkown block
Pid 1 com: swapper not tainted 2.6.35-24 generic
(or something similar, I’ve wrote down by hand)

…Mind panic…

I lost 2 hours, and then find a really simple solution:

* Boot with older kernel (I’ve also 2.6.35-22)
* Reintall linux-image-2.6.35-24-generic (Linux kernel image for version 2.6.35 on x86/x86_64) from Synaptic
* I’ve done also a sudo update-grub to update grub menu

sudo reboot!

Good Luck

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You can download from this link both source and app, and customize as you want.

All code is in a file called program.cs, I provide also Visual Studio 2005 project and solution file.

Here is the code:

static void Main(string[] args)
{

  Console.WriteLine();
  Console.WriteLine("SkypeChatToTxt");
  Console.WriteLine();

  string basePath = "";
  basePath = System.Reflection.Assembly.GetExecutingAssembly().GetModules()[0].FullyQualifiedName;
  basePath = System.IO.Path.GetDirectoryName(basePath);
  basePath += "\\skype chat";
  int iCounter = 0;
  while (System.IO.Directory.Exists(basePath + " " + iCounter.ToString()))
  {
    iCounter++;
  }
  basePath += " " + iCounter.ToString();
  System.IO.Directory.CreateDirectory(basePath);

  Console.WriteLine("BasePath = " + basePath);
  Console.WriteLine();
  SKYPE4COMLib.Skype oSkype = new SKYPE4COMLib.Skype();
  if (!oSkype.Client.IsRunning) oSkype.Client.Start(true, true);

  string owner = oSkype.CurrentUser.FullName + " (" + oSkype.CurrentUser.Handle + ")";

  foreach (SKYPE4COMLib.Chat oChat in oSkype.Chats)
  {
    try
    {

      string name = oChat.Name;
      string description = oChat.Description;
      SortedList<string, string> members = new SortedList<string, string>();
      foreach (SKYPE4COMLib.User oUser in oChat.Members)
      {
        members.Add(oUser.FullName + " (" + oUser.Handle + ")", null);
      }

      string filename = "\\chat";
      foreach (string m in members.Keys)
      {
        filename += " " + m;
      }
      filename = filename.Replace(owner, "").Replace("  ", " ");
      if (filename.Length > 100) filename = filename.Substring(0, 100);
      filename = filename.Trim() + ".txt";

      Console.WriteLine();
      Console.WriteLine("Chat File = " + filename);
      Console.WriteLine("With " + oChat.Messages.Count.ToString() + " Message(s)");

      filename = basePath + filename;

      int iMessageCount = oChat.Messages.Count;
      iCounter = 0;
      StringBuilder messages = new StringBuilder(21000);
      foreach (SKYPE4COMLib.ChatMessage oMessage in oChat.Messages)
      {
        iCounter++;
        messages.Append(oMessage.Timestamp + "\t" + oMessage.FromDisplayName + "\t" + oMessage.Body + "\r\n");
        if (iCounter % 25 == 0) Console.Write(".");
        if (messages.Length > 20000)
        {
          System.IO.File.AppendAllText(filename, messages.ToString());
          messages = new StringBuilder(21000);
          GC.Collect();
        }
        if (iMessageCount - iCounter > 1000)
        if ((iMessageCount - iCounter) % 1000 == 0)
        {
          Console.WriteLine("");
          Console.Write((iMessageCount - iCounter).ToString() + " ");
        }
      }
      System.IO.File.AppendAllText(filename, messages.ToString());
      Console.WriteLine(" OK");
    }
    catch (Exception ex)
    {
      Console.WriteLine();
      Console.WriteLine("Error " + ex.Message);
      Console.WriteLine();
    }
  }

  Console.WriteLine("");
  Console.WriteLine("Done");
}

Enjoy it!

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http://home.eeti.com.tw/web20/eGalaxTouchDriver/linuxDriver.htm

32Bit 2010/01/20
Kernel 2.4.x 3.00.3719
Kernel 2.6.x 3.00.3719 [download this one]

At this time filename is eGalaxTouch-3.00.3719-32b-k26.tar.gz, untar on Desktop or wherever you want.

Two files are needed:

• eGalaxTouch.tar.gz
• setup.sh

WARNING! setup.sh writes on /etc/X11/xorg.conf and probably you don’t have in Ubuntu 9.10, xorg configuration is now done with another XML configuration file, but xorg.conf is supported if present.

so let’s create xorg.conf before exec setup.sh:

sudo gedit /etc/X11/xorg.conf

fill with a space and save.

Now you can launch setup.sh, and all should go fine:

sudo sh setup.sh

Bye

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No way to install Ubuntu Desktop, it takes about 3.5 GB, so I choose Ubuntu Server and in some way selecting packages to fit in 2GB.

So this is what I have done:

1 Install Ubuntu Server with minimal packages

… nothing to say, this is very simple.

2 Install Gnome Desktop (only Gnome, without OpenOffice, Firefox, Evolution e Co)

Login with your username and password, update packages with:

sudo apt-get update

Install Gnome-only with:

sudo apt-get install --no-install-recommends ubuntu-desktop

If you install standard ubuntu-desktop package (ommitting –no-install-recommends), it contains as recommended packages a very large number of application, sometimes usefull, sometimes not, and last one is my case, I want only gnome.

Once it’s done, reboot and login in Gnome GUI:

sudo reboot

Now 1.3 GB are used:

3 Upgrade and Clean Up

Usually I prefer to interact with a graphical interface, to do this click on System menù, Administration, Update Manager.

Otherwise to update packages list, type on terminal:

sudo apt-get update

After this upgrade old packages:

sudo apt-get upgrade

and finally clean orphans:

sudo apt-get autoremove

At the end here disk space status:

This is a simple result with simple steps, but I have to working on to remove other things and gain free space to install Mono, but it’s another quest!

Bye

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* login as root (or administrator)
* sudo mv /etc/X11/xorg.conf /etc/X11/xorg.old
* sudo gdm (Gnome starts)
* reboot

Bye

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Here the code:

public void PrintString(string toSend, string printerPath)
{
IntPtr myPtrPort;
Int32 iByteWritten = 0;

myPtrPort = CreateFile(printerPath, GENERIC_WRITE, FILE_SHARE_WRITE, IntPtr.Zero, OPEN_EXISTING, 0, IntPtr.Zero);

if (myPtrPort.ToInt32() <= 0)
throw new Exception("Error " + GetLastError().ToString());

if (!WriteFile(myPtrPort, System.Text.ASCIIEncoding.ASCII.GetBytes(toSend),
System.Text.ASCIIEncoding.ASCII.GetByteCount(toSend), ref iByteWritten, IntPtr.Zero))
throw new Exception("Error " + GetLastError().ToString());

if (!FlushFileBuffers(myPtrPort))
throw new Exception("Error " + GetLastError().ToString());

if (!CloseHandle(myPtrPort))
throw new Exception("Error " + GetLastError().ToString());
}

const Int32 FILE_SHARE_READ = 0x00000001;
const Int32 FILE_SHARE_WRITE = 0x00000002;
const Int32 FILE_SHARE_DELETE = 0x00000004;
const Int32 OPEN_EXISTING = 3;

const uint GENERIC_READ = (0x80000000);
const Int32 GENERIC_WRITE = (0x40000000);

const Int32 FILE_FLAG_NO_BUFFERING = 0x20000000;
const Int32 FILE_READ_ATTRIBUTES = (0x0080);
const Int32 FILE_WRITE_ATTRIBUTES = 0x0100;
const Int32 ERROR_INSUFFICIENT_BUFFER = 122;

[DllImport("kernel32.dll", SetLastError = true)]
static extern IntPtr CreateFile(
string lpFileName,
Int32 dwDesiredAccess,
Int32 dwShareMode,
IntPtr lpSecurityAttributes,
Int32 dwCreationDisposition,
Int32 dwFlagsAndAttributes,
IntPtr hTemplateFile);

[DllImport("kernel32.dll", SetLastError = true)]
static extern bool CloseHandle(IntPtr hObject);

[DllImport("kernel32.dll")]
static extern bool ReadFile(IntPtr hFile, byte[] lpBuffer,
Int32 nNumberOfBytesToRead, ref Int32 lpNumberOfBytesRead, IntPtr lpOverlapped);

[DllImport("kernel32.dll")]
static extern bool WriteFile(IntPtr hFile, byte[] lpBuffer,
Int32 nNumberOfBytesToWrite, ref Int32 lpNumberOfBytesWritten, IntPtr lpOverlapped);

[DllImport("kernel32.dll")]
static extern bool FlushFileBuffers(IntPtr hFile);

[DllImport("kernel32.dll", SetLastError = true)]
static extern int GetLastError();

.

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