changing cursor when hover over listview item subitem - C# Discussion Boards

Re: Searching for IO Control Codes

13-Oct-04 10:53

Hi all I'm again.

I'm looking for the Input and Output Control Codes for the following Consts:

IOCTL_CDROM_GET_CONTROL
IOCTL_CDROM_PAUSE_AUDIO
IOCTL_CDROM_PLAY_AUDIO_MSF
IOCTL_CDROM_RAW_READ
IOCTL_CDROM_READ_TOC
IOCTL_CDROM_RESUME_AUDIO
IOCTL_CDROM_SEEK_AUDIO_MSF
IOCTL_CDROM_STOP_AUDIO

I can't find any information about the control codes. I've searched in the MSDN in different foren, in the Plattform SDK and in the Windows DDK. I only get the Consts like listed on top of this thread but nowhere the Codes.

The main problem is, that the API "DeviceIOControl" needs the Control Codes.

Hope, that someone can help me.

Thanks in advance

BB

Dave Kreskowiak14-Oct-04 3:07

Dave Kreskowiak

14-Oct-04 3:07

If you install the Platform SDK (BIG install!), you can search the header files (*.H) for the constants your looking for. They probably show up like:

#define IOCTL_CDROM_GET_CONTROL 0x0400

or something very similar.

RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome

Re: Searching for IO Control Codes

BoxenBiene14-Oct-04 8:04

changing cursor when hover over listview item subitem

14-Oct-04 8:04

Thanks men.

Now I know my problem. I haven't got the full Platform SDK.

Best wishes

BB

vista2713-Oct-04 10:44

vista27

13-Oct-04 10:44

what i'm trying to do is change the cursor from arrow to a hand when i hover over a particular subitem in my listview. catching a listview mouse_down event passes you in mouseEventArgs, from which you can get an X and Y coordinate, which u can then pass to GetItemAt and get back that particular subitem you clicked on. i naturally thought a mouse_enter/leave/hover would work in the same way, but no mouseeventargs are passed in. so how do i go about finding out which subitem i'm hovering my cursor over if i get no x and y coordinates? thanks!

Re: changing cursor when hover over listview item subitem

MrEyes14-Oct-04 2:13

MrEyes

14-Oct-04 2:13

I recently did something similar to this, but my aim was to display tooltips for each ListViewItem (the tooltip data is contained in the ListViewItem.Tag property). I used the MouseMove event.

The following code could easily be modified to change the cursor or perform any other task:

private ToolTip lviTip = new ToolTip();
...
private void myList_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
{
	ListViewItem lvi = myList.GetItemAt(e.X, e.Y);
	if (lvi != null)
	{
		string tipText = lvi.Tag.ToString();

		lviTip.SetToolTip(myList, tipText);
	}
	else
	{
		lviTip.SetToolTip(myList, string.Empty);
	}
}

post.mode = postmodes.signature;
SELECT everything FROM everywhere WHERE something = something_else;
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Translating Win32API and their Structs problems

BoxenBiene13-Oct-04 10:42

Re: Translating Win32API and their Structs problems

13-Oct-04 10:42

Hi all,

I want to use the Windows API "DeviceIOControl" for reading the TOC of a inserted CDRom.
Therefor I need some structs with wich i have a lot off problems to translate.

Is anybody able to help me?

The API "DeviceIOControl":

BOOL DeviceIoControl(
HANDLE hDevice,
DWORD dwIoControlCode,
LPVOID lpInBuffer,
DWORD nInBufferSize,
LPVOID lpOutBuffer,
DWORD nOutBufferSize,
LPDWORD lpBytesReturned,
LPOVERLAPPED lpOverlapped
);

The following structs are needed:

typedef struct _CDROM_TOC
{
UCHAR Length[2];
UCHAR FirstTrack;
UCHAR LastTrack;
TRACK_DATA TrackData[MAXIMUM_NUMBER_TRACKS];
} CDROM_TOC, *PCDROM_TOC;

typedef struct _TRACK_DATA
{
UCHAR Reserved;
UCHAR Control : 4;
UCHAR Adr : 4;
UCHAR TrackNumber;
UCHAR Reserved1;
UCHAR Address[4];
} TRACK_DATA, *PTRACK_DATA;

typedef struct __RAW_READ_INFO
{
LARGE_INTEGER DiskOffset;
ULONG SectorCount;
TRACK_MODE_TYPE TrackMode;
} RAW_READ_INFO, *PRAW_READ_INFO;

Or has anybody a better thought?

Thanks in advance

BB

yoaz14-Oct-04 7:10

yoaz

14-Oct-04 7:10

you surely tried translating all pointers to

IntPtr<code>, handles words to int's, UCHAR to byte, etc.? What specifically is the problem? <br />
<br />
there are no facts, only interpretations

Re: Translating Win32API and their Structs problems

BoxenBiene14-Oct-04 8:01

Re: Translating Win32API and their Structs problems

14-Oct-04 8:01

Hi,

You detect the main problem that I have. In the Help for examaple I have found, that the meaning for UCHAR is Unsigned CHAR. That' what I don't understand.

So if you are able to complete the list you have started or you can tell me where to find the exact translation I was delited.

Thanks in advance

BB

yoaz14-Oct-04 8:41

yoaz

14-Oct-04 8:41

hope this helps:

struct _CDROM_TOC
{
	byte[] Length = new byte[2];
	byte FirstTrack;
	byte LastTrack;
	TRACK_DATA TrackData[MAXIMUM_NUMBER_TRACKS];
}

struct TRACK_DATA 
{
	byte Reserved;
	byte Control;
	byte Adr;
	byte TrackNumber;
	byte Reserved1;
	byte Address[4];
} 

struct RAW_READ_INFO 
{
	Int64 DiskOffset;
	UInt32 SectorCount;
	TRACK_MODE_TYPE TrackMode;
}

I'm not sure that LARGE_INT translated to Int64 but it should, otherwise define a struct to hold it (check it out at MSDN). You also didn't specify what is TRACK_MODE_TYPE structure.
Try checking out MSDN documentation on the Marshal class

there are no facts, only interpretations

ListView Add Data

mfcuser13-Oct-04 10:06

13-Oct-04 10:06

I have my listview where I plot some data. I want to show the data to a table, so I am using listview. I do have problem using the subitem function. I can show my x data to the fist column, however I am having problem to show the y data to the next column

here is my code

<br />
private void button1_Click(object sender, System.EventArgs e)<br />
		{<br />
			double[] dData  = new double[200];<br />
			double[] dData2 = new double[200];<br />
<br />
			for(int i=0;i<200;i++)<br />
			{<br />
				dData[i]  = Math.Sin(0.09*i);<br />
				dData2[i] = Math.Cos(0.1*i);<br />
				listView1.Items.Add(i.ToString()); //show the x data to the fist colunm however I couldn't find a way to show the sine and the cosine to the next colunm<br />
				<br />
			}<br />
			waveformPlot1.PlotY(dData);<br />
			waveformPlot2.PlotY(dData2);<br />
		}<br />

so my output looks like that
col 1 col 2 col 3
0 blank blakk
1 blank blank

show how can I show subitem in the listview

Anonymous13-Oct-04 10:55

Anonymous

13-Oct-04 10:55

You have to use ListViewItem Class. First you need to add the columns to ListViewItem and add the ListViewItem to the ListView Control.

Try this...

private void button1_Click(object sender, System.EventArgs e)

{

double[] dData = new double[200];

double[] dData2 = new double[200];

ListViewItem newItem = null;

for(int i=0;i<200;i++)

{

dData[i] = Math.Sin(0.09*i);

dData2[i] = Math.Cos(0.1*i);

newItem= new ListViewItem();

newItem.SubItems.Add(i.ToString());

newItem.SubItems.Add(dData[i].ToString());

newItem.SubItems.Add(dData2[i].ToString());

this.listView1.Items.Add(newItem);

}

Cheers,
jagan

mfcuser13-Oct-04 11:28

13-Oct-04 11:28

I have tried it over and got it right;

this was the only line that I missed

this.listView1.Items.Add(newItem);

mfcuser13-Oct-04 11:43

13-Oct-04 11:43

also the first column is blank. The index which is i doesn't show on the fist column

jagan7914-Oct-04 7:01

jagan79

14-Oct-04 7:01

Hmmmm thats interesting... Anyway this is not right way but try this..

private void button1_Click(object sender, System.EventArgs e)
{
double[] dData = new double[200];
double[] dData2 = new double[200];
ListViewItem newItem = null;
for(int i=0;i<200;i++)
{
dData[i] = Math.Sin(0.09*i);
dData2[i] = Math.Cos(0.1*i);
newItem= new ListViewItem(i.ToString());
newItem.SubItems[1].Text = dData[i].ToString();
newItem.SubItems[2].Text = dData2[i].ToString();
newItem.SubItems.Add(dData[i].ToString());
newItem.SubItems.Add(dData2[i].ToString());
this.listView1.Items.Add(newItem);
}

Cheers,
Jagan

mfcuser14-Oct-04 8:29

14-Oct-04 8:29

I received the following error on that line

newItem.SubItems[1].Text = dData[i].ToString();

An unhandled exception of type 'System.ArgumentOutOfRangeException' occurred in system.windows.forms.dll

Additional information: Specified argument was out of the range of valid values.

mfcuser14-Oct-04 8:32

14-Oct-04 8:32

However by removing the two lines, the rest of the code works fine. This is the one that works

<br />
private void button1_Click(object sender, System.EventArgs e)<br />
		{<br />
			double[] dData  = new double[200];<br />
			double[] dData2 = new double[200];<br />
			ListViewItem newItem = null;<br />
<br />
			for(int i=0;i<200;i++)<br />
			{<br />
				dData[i]  = Math.Sin(0.09*i);<br />
				dData2[i] = Math.Cos(0.1*i);<br />
				newItem= new ListViewItem(i.ToString());<br />
				newItem.SubItems.Add(dData[i].ToString());<br />
				newItem.SubItems.Add(dData2[i].ToString());<br />
				this.listView1.Items.Add(newItem);<br />
			}<br />
			waveformPlot1.PlotY(dData);<br />
			waveformPlot2.PlotY(dData2);<br />
		}<br />