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Copying Data to the Clipboard
Having registered a Clipboard format, we can look at copying data to the Clipboard. Let's first look at the OnUpdate. . . handler for the Edit Copy command:
void CClipView::OnUpdateEditCopy(CCmdUI* pCmdUI)<br />
{<br />
int i = m_wndList.GetSelCount();<br />
pCmdUI->Enable(i > 0 ? TRUE : FALSE);<br />
}
If no items are selected, the command is disabled. This does two things: It shows the user the command won't do anything (it's grayed out), and it prevents us from getting Copy commands when there is nothing to copy. Let's look at the code for doing the actual copy operation:
void CClipView::OnEditCopy()<br />
{<br />
int iCount = m_wndList.GetSelCount();<br />
ASSERT(iCount > 0);<br />
int* pItems = new int [iCount];<br />
m_wndList.GetSelItems(iCount, pItems);<br />
CMyObList ObList;<br />
int i;<br />
CMyObj* pObj;<br />
for (i=0; i<iCount; i++) {<br />
pObj = (CMyObj*) m_wndList.GetItemData(pItems[i]);<br />
ObList.Append(pObj);<br />
}<br />
delete pItems;<br />
CSharedFile mf (GMEM_MOVEABLE|GMEM_DDESHARE|GMEM_ZEROINIT);<br />
CArchive ar(&mf, CArchive::store); <br />
ObList.Serialize(ar);<br />
ar.Close();
HGLOBAL hMem = mf.Detach();<br />
if (!hMem) return;<br />
ObList.RemoveAll();<br />
OpenClipboard();<br />
EmptyClipboard();<br />
SetClipboardData(theApp.m_uiMyListClipFormat, hMem);<br />
CloseClipboard();<br />
}
The number of selected items is used to create a temporary array of selection IDs. The IDs are set into the array by calling GetSelItems. A new CMyObList is created and the pointer to each object is added to the list. Note that we are adding a reference to an object that is in use elsewhere, so it's important that we don't delete these objects by mistake when we're done here.
Once the new CMyObList object has been built, a CSharedFile is created and an archive is created on top of the shared file. We can now serialize the list to the archive and, hence, to the shared file in memory. Once that's done, the memory of the shared file is detached, ready for sending to the Clipboard. The temporary CMyList object has all its items removed, not destroyed. The list object itself is, of course, destroyed when the function exits. The Clipboard is opened, emptied, and set with the data from the shared file. The memory block now becomes the property of the Clipboard. Finally, the Clipboard is closed.
If you use the Clipboard viewer after copying a list to the Clipboard, you'll see an item from your private format. You can't view the data, of course, because the Clipboard has no way of understanding it. You can add that capability for owner-drawn Clipboard items if you want the user to be able to see the data in the Clipboard viewer.
Appu..
"If you judge people, you have no time to love them."
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Hello everyone!
First of all, I'm planning on using wxWidgets and not MFC... If that's not possible, I'll just do MFC.
Anyways... I need a custom control. I need it to be a grid of colorable characters... I've got no idea how to do this, I've read a couple of tutorials before (for C#) but I just didn't get it... I was planning to do a SDL program instead, but then I thought it would be a waste. Thanks!
-- modified at 1:28 Saturday 8th July, 2006
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Well, at least I have an excuse to not do it in wxWidgets: There were no sites, tutorials, or forums that at all helped. 
Anyways... Is there some tutorial that teaches the basics on doing controls? I don't get it, I know you inherit from an existing control's class... But, like, my control is a ListView, but with the following changes changes:
* No labels at the top.
* Fixed-size grid boxes.
* Colorable boxes. (Basic text formatting will do)
* Remove grid lines (The user can select to add it though)
I mean, how do I change it to remove the gridlines or the labels? Is it a code file, a resource, or what? Thanks!
Windows Calculator told me I will die at 28. 
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Help me!
I needing stack simulation, but I can't simulation with picture.
I want you help me, give me some source code write on Dialog with SDI.
If you can, give me: email: trinhcung_83@yahoo.com
Thanks!
-- modified at 0:01 Saturday 8th July, 2006
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I have been having a problem with getting a CString edit box displaying the data in the CString. Note, the float variables display correctly. Only the CString will not.
Here is the problem peice of code:
int n = m_lbModelList.GetCurSel();
m_strModelFileName = g_CarInfo.Graphics.pModel[n].strFileName;
m_fModelScaleX = g_CarInfo.Graphics.pModel[n].fScaleX;
m_fModelScaleY = g_CarInfo.Graphics.pModel[n].fScaleY;
m_fModelScaleZ = g_CarInfo.Graphics.pModel[n].fScaleZ;
UpdateData(FALSE);
Now this version of the code works perfectly but defeats the purpose of a list box:
int n = m_lbModelList.GetCurSel();
m_strModelFileName = g_CarInfo.Graphics.pModel[5].strFileName;
m_fModelScaleX = g_CarInfo.Graphics.pModel[n].fScaleX;
m_fModelScaleY = g_CarInfo.Graphics.pModel[n].fScaleY;
m_fModelScaleZ = g_CarInfo.Graphics.pModel[n].fScaleZ;
UpdateData(FALSE);
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SySt wrote: m_strModelFileName = g_CarInfo.Graphics.pModel[5].strFileName;
Shouldn't that be g_CarInfo.Graphics.pModel[n].strFileName;? Maybe the 5 is messing it up.
- S
50 cups of coffee and you know it's on!
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No, that 5 is usually an "n". What I mean by changing that peice of code is that this:
m_strModelFileName = g_CarInfo.Graphics.pModel[5].strFileName;
puts the filename stored in the index "5" of the pModel arrray into the editbox. 5 is just an example, any valid index of the array works just the same.
The weird thing is that if I put the code like this:
m_strModelFileName = g_CarInfo.Graphics.pModel[n].strFileName;
"n" being the integer retrieved from CListBox::GetCurSel(). No matter what number "n" comes out to be the data from the array does not display in the editbox. If "n" turns out to be "5", then are the two lines of code not identical? They appareantly do not give the same result.
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Hi,
I'd like to use a CTabCtrl with CFormViews in it (preferably the CResizableFormView class which can be found on this site). I've been going crazy over this all day and I can't figure out whether it's possible to do that instead of using CDialogs.
Normally you would do something like this:
CDialog *m_tabPages[2];
m_tabPages[0]->Create(IDD_TAB1, this);
m_tabPages[1]->Create(IDD_TAB2, this);
Now I've tried putting:
CResizableFormView *m_tabPages[2];
m_tabPages[0]->Create(IDD_TAB1);
m_tabPages[1]->Create(IDD_TAB2);
However, the CFormView::Create() function takes other arguments and I cannot find anything about it on msdn: Create(LPCTSTR, LPCTSTR, DWORD, const RECT&, CWnd *, UINT, CCreateContext*)
I tried to overwrite the default Create function in the CResizableFormView class, but I don't exactly know what to do.
So my question is, can I get tabs to work by placing CFormViews in them and if so... how? 
Thanks a lot if you could help me out!
Greetings,
Edward.
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I am using this code to select a listview item. i specify the postion of item using (WPARAM)2 . So this one supposed to highlight and selct the postion 2 in the listview. But unfortuently it does not select but it does deselct. I mean if the item is selected by mouse click it can deselect it but can not select it. Could any one tell me what i am doing wrong here.Thanks
SendMessage(listview, LVM_SETITEMSTATE, (WPARAM)2, (LPARAM)_lvi);
void CSelectuserDlg::OnButton1() <br />
{<br />
<br />
HWND listview=NULL;
HWND parent,child; <br />
parent=NULL; <br />
child=NULL; <br />
parent = ::FindWindow("My Window Class",NULL); <br />
<br />
child =::FindWindowEx(parent,0,"WTL_SplitterWindow",NULL); <br />
child =::FindWindowEx(child,0,"WTL_SplitterWindow",NULL); <br />
child =::FindWindowEx(child,0,"WTL_SplitterWindow",NULL); <br />
child =::FindWindowEx(child,0,"ATL:0053C8D0",NULL); <br />
listview=::FindWindowEx(child,0,"SysListView32",NULL); <br />
<br />
LVITEM lvi, *_lvi; <br />
unsigned long pid; <br />
HANDLE process; <br />
<br />
GetWindowThreadProcessId(listview, &pid); <br />
process=OpenProcess(PROCESS_VM_OPERATION|PROCESS_VM_READ|PROCESS_VM_WRITE|PROCESS_QUERY_INFORMATION, FALSE, pid); <br />
<br />
<br />
_lvi=(LVITEM*)VirtualAllocEx(process, NULL, sizeof(LVITEM), MEM_COMMIT, PAGE_READWRITE); <br />
lvi.mask = LVIF_STATE; <br />
lvi.state = true; <br />
lvi.stateMask = LVIS_SELECTED; <br />
<br />
WriteProcessMemory(process, _lvi, &lvi, sizeof(LVITEM), NULL); <br />
::SendMessage(listview, LVM_SETITEMSTATE, (WPARAM)2, (LPARAM)_lvi); <br />
VirtualFreeEx(process, _lvi, 0, MEM_RELEASE);<br />
<br />
}
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Hey, I just came across this strange prototype.
This is really weird.
void comm_perror(int error, char *format, ...)
Does anyone have a clue to what the ... parameter is suppose to mean.
This is actually a real function in one of the source codes I was reviewing
If anyone has an answer to this question please keep me posted
Cheers,
Jay
-- modified at 17:08 Friday 7th July, 2006
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Sir
Can any one tell is there any library which can help me
in solveing some problems in Coordiante geometry,Trignometry.
Fly Like An Eagle With MIGHTY POWER.
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So, do you want to tell us which problems?
If all you want is sin, then just use math.h
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CodeVarma wrote: in solveing some problems in Coordiante geometry,Trignometry.
In Math libarary there only function like cos,sin,tan... if you like more math function... you might try matlabs or boost library
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You
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Any chance any one has an sample project where data from a CListCtrl
is stored and retrieved? I just cant get my own sample project to
work correctly and if I could see something work, then I could try
to mimic those features in my own program.
Please, any response any one can give me will be greatly appreciated.
Sincerely,
Danielle Brina
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Hi I would like to know clearly about the date formating of CTime class.
_T("%b %d, %Y %I:%M:%S %p")
Like above I saw different formattings at different places.
Can Any one please kindly let me know what are those formats represents for.
Means which is represents sec and which is represents for min and etc like that.
And I need to know what are different formats available to use this.
This is urgent for me. Thanks a lot in advance.
Nice talking to you. 
If you judge people, you have no time to love them. -- Mother Teresa
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Hi Fellows
I've created an app that reads mp3 sounds. It works fine. I have a idea: I would like to set the volume of the music that is played. I don't have any idea about what interface I must to use or property or anything else.
To play my mp3 sounds I have these interfaces:
IGraphBuilder, IMediaControl, IMediaEvent, IMediaPosition.
I create the IGraphBuilder like this:
<br />
HRESULT hr = CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC, IID_IGraphBuilder, (void**)&g_pMediaGraph);<br />
And the other interfaces like this
<br />
g_pMediaGraph->QueryInterface(IID_IMediaControl, (void**)&g_pMediaControl); g_pMediaGraph->QueryInterface(IID_IMediaEvent, (void**)&g_pMediaEvent); g_pMediaGraph->QueryInterface(IID_IMediaPosition, (void**)&g_pMediaPosition); g_pMediaGraph->RenderFile(wstrFileName, NULL);<br />
Where g_MediaGraph is my IgraphBuilder interface.
Do I need to use another interface instead any of these? If anyone knows a good resource, answer me.
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Thanks a lot man, that's exactly what I needed.
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Hi all. i am using this code to change color of listview item.
But unfortunetly it goes and changes color of all item instead
of only changing the color selected listview item. Could an expert
look at this and show me how i can only change color of selected
listview item instead of coloring all items in listview.Thanks
void CColor1Dlg::OnButton1() <br />
<br />
{<br />
<br />
HWND hPalWnd = ::FindWindow("my window class", NULL);<br />
<br />
HWND spilterwindow = FindWindowEx(hPalWnd, 0, "WTL_SplitterWindow", 0);<br />
<br />
spilterwindow = FindWindowEx(spilterwindow, 0, "WTL_SplitterWindow", 0);<br />
<br />
HWND ATL = FindWindowEx(spilterwindow, 0, "WTL_SplitterWindow", 0);<br />
<br />
HWND ATLWIN = FindWindowEx(ATL, 0, "atl:0053c8d0", 0);<br />
<br />
HWND Dialog = FindWindowEx(ATLWIN, 0, "SysListView32", 0);<br />
<br />
HWND Rich = FindWindowEx(Dialog, 0, "SysHeader32", 0);<br />
<br />
<br />
<br />
CButton *pButton1 = (CButton*)GetDlgItem(IDC_BUTTON1);<br />
<br />
COLORREF GetBkColor(IDC_BUTTON1);<br />
<br />
<br />
COLORREF color = 33023;<br />
<br />
TRACE("Color of the selected font = %8x\n", color);<br />
<br />
<br />
<br />
::SendMessage(Dialog, LVM_SETTEXTCOLOR, 0, color);<br />
<br />
<br />
<br />
}
-- modified at 12:16 Friday 7th July, 2006
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That code looks like an absolute nightmare...
I think that in order to do what you want you would need to have to do custom draw for your list view.
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