I add my program two RichEdit which the one displays binary contents and the another shows the index of the byte. I hope these two edit always anchor on the same position while/after scrolling.
A possible way is to handle the main RichEdit's WM_VSCROLL and WM_MOUSEWHEEL message and pass the message and parameters to the second RichEdit. I've tried this but I found that the two edits aligned not very well. And the other disadvantage is the both RichEdits' scroll bar needs to be enabled, if I only enable one, the another can't receive WM_MOUSEWHEEL message, but I hope one scroll bar displayed only.
The second way I've tried is using a timer and synchronize with LINESCROLL regularly by the time (< 10ms is better). This works well most of the time, but sometimes still have the unaligned issue.
Is there a better solution to handle this kind of demand?
//---------------------------------------------------------------------------
void __fastcall TBinaryEdit::Timer1Timer(TObject *Sender)
{
int srcLine = 0;
int trgLine = 0;
if (Sender == Timer1) {
srcLine = GetRichEditLineNo(MainEdit);
trgLine = GetRichEditLineNo(IndexEdit);
if (srcLine != trgLine) {
SendMessage(IndexEdit->Handle, EM_LINESCROLL, 0, srcLine - trgLine);
}
}
}
//---------------------------------------------------------------------------
int TBinaryEdit::GetRichEditLineNo(TRichEdit* RE)
{
int line;
int wordpos;
TRect rt;
POINTL pt;
SendMessage(RE->Handle, EM_GETRECT, 0, LPARAM(&rt));
pt.x = RE->Left + rt.left;
pt.y = RE->Top + rt.top;
wordpos = SendMessage(RE->Handle, EM_CHARFROMPOS, 0, LPARAM(&pt));
line = SendMessage(RE->Handle, EM_LINEFROMCHAR, wordpos, 0);
return line;
}
Thanks for your help. I've found a simple solution for my short-term need.
As I mentioned before, the second RichEdit's scroll bar should be enabled for receiving WM_MOUSEWHEEL message, but I don't like both edit have scroll bar displayed. For this reason, I use EM_LINESCROLL instead to replace the mouse wheel message. I write a sub class derive the TRichEdit and overwrite its WM_MOUSEWHEEL handler, then pass EM_LINESCROLL message with the mouse wheel's delta value to both RichEdits.
int zDelta = GET_WHEEL_DELTA_WPARAM(Message.WParam);
int scroll = zDelta == -120 ? 1 : -1;
SendMessage(MainEdit->Handle, EM_LINESCROLL, 0, scroll);
SendMessage(IndexEdit->Handle, EM_LINESCROLL, 0, scroll);
This makes the text vertical offset in RichEdits be aligned. But I think there must be better solution, I will keep research for improvement.
I am a beginner in building MFC application. I've just started using list controls (in report view) and I am facing some problems while updating the list. I have three buttons for add, update and delete. Everything works well except the update. Here's the code.
void CAddDetailsDlg::DoDataExchange(CDataExchange* pDX)
{
CDialogEx::DoDataExchange(pDX);
DDX_Control(pDX, IDC_DEPARTMENT, departmentControl);
DDX_Text(pDX, IDC_NAME, m_name);
DDX_Text(pDX, IDC_ID, m_id);
DDX_Text(pDX, IDC_AGE_BUDDY, m_ageVariable);
DDX_CBString(pDX, IDC_DEPARTMENT, m_department);
DDX_Control(pDX, IDC_LIST1, m_listControl);
}
BOOL CAddDetailsDlg::OnInitDialog()
{
CDialogEx::OnInitDialog();
// TODO: Add extra initialization here
ageSpin=reinterpret_cast<CSpinButtonCtrl*>(GetDlgItem(IDC_AGE_SPIN));
ageBuddy=reinterpret_cast<CEdit*>(GetDlgItem(IDC_AGE_BUDDY));
ageSpin->SetBuddy((ageBuddy));
ageSpin->SetRange32(18,60);
departmentControl.AddString("Human Resource");
departmentControl.AddString("Manager");
departmentControl.AddString("Administrator");
departmentControl.AddString("Desktop Engineer");
m_listControl.InsertColumn(0,"ID",0,100);
m_listControl.InsertColumn(1,"Name",0,100);
m_listControl.InsertColumn(2,"Age",0,60);
m_listControl.InsertColumn(3,"Department",0,100);
m_listControl.SetExtendedStyle(LVS_EX_GRIDLINES | LVS_EX_FULLROWSELECT );
m_ageVariable="18";
UpdateData(FALSE);
return TRUE; // return TRUE unless you set the focus to a control
// EXCEPTION: OCX Property Pages should return FALSE
}
void CAddDetailsDlg::OnBnClickedEdit()
{
// TODO: Add your control notification handler code here
UpdateData();
if((m_id=="")||(m_name=="")||(m_department=="")||(m_ageVariable==""))
{
MessageBox("Please choose an item to edit","Error");
}
else
{
int index=m_listControl.GetSelectionMark();
m_listControl.SetItemText(index,0,m_id);
m_listControl.SetItemText(index,1,m_name);
m_listControl.SetItemText(index,2,m_ageVariable);
m_listControl.SetItemText(index,3,m_department);
MessageBox("Successfully Updated","Info");
}
}
void CAddDetailsDlg::OnBnClickedNewButton()
{
// TODO: Add your control notification handler code here
UpdateData();
if((m_id=="")||(m_name=="")||(m_department=="")||(m_ageVariable==""))
{
MessageBox("Please fill in all the details","Error");
}
else
{
int count=m_listControl.GetItemCount();
count=m_listControl.InsertItem(count,m_id);
m_listControl.SetItemText(count,1,m_name);
m_listControl.SetItemText(count,2,m_ageVariable);
m_listControl.SetItemText(count,3,m_department);
}
}
Note:-
The update function works fine if I update only the ID. If I try to update all/ many fileds, only the ID gets updated and nothing else. BTW, age is a spinControl, department is a comboBox and the other two are editBox.
Edit:-
I found that both, the value of variable m_name and the editBox value changes to the older values after the line m_listControl.SetItemText(index,0,m_id);. Its the same case with m_age and m_department.
If I comment the line m_listControl.SetItemText(index,0,m_id);, I can update everything at a time except the ID.
I am able to update everything by storing m_name, m_age and m_department in a local variable just before the line m_listControl.SetItemText(index,0,m_id); and using those variables in SetItemText(). But as I'm learning, I wanna know where I'm going wrong.
i think you forget to add UpdateData() before your code which is under Update_Bn_Click because at my side i use your code with updatedata() and its working fine.
UpdateData();
int index=m_List.GetSelectionMark();
m_List.SetItemText(index,0,m_id);
m_List.SetItemText(index,1,m_Name);
m_List.SetItemText(index,2,m_Age);
m_List.SetItemText(index,3,m_DepartMent);
Try pumping some messages after updating the items.
while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
Turn off your sorting.
In your designer:
Properties>Behaviour>Sort set to None.
You have to add Item into 0 colomn index first.
listcontrol->InsertItem(0,_T("text"));
then, you can set text to the subItem;
listctrol->SetItemText(0,1,_T(subText)):
First, make sure the Owner Data property of the control is set to FALSE.
Maybe try m_List.Update(index) after the last SetItemText().
I must admit that everywhere I need updated list elements, I use an Owner Data CListCtrl because I think its faster in case of a big number of items and easier to handle in the long term.
I have a CListCtrl and I need to change the color of A SPECIFIC character/set of characters (which I choose by comparison) from the text of every cell in the list.
I know how to change the color of the entire text of the cell when I find the character/set of characters (by using 'strstr' command), but I can't find an example which shows how to change ONLY the character/set of characters.
Here is a sample of my code:
void Agenda::OnCustomdrawMyList( NMHDR* pNMHDR, LRESULT* pResult )
{
NMLVCUSTOMDRAW* pLVCD = (NMLVCUSTOMDRAW*)pNMHDR;
*pResult = CDRF_DODEFAULT;
if (CDDS_PREPAINT == pLVCD->nmcd.dwDrawStage)
{
*pResult = CDRF_NOTIFYITEMDRAW;
return;
}else if (CDDS_ITEMPREPAINT == pLVCD->nmcd.dwDrawStage)
{
*pResult = CDRF_NOTIFYSUBITEMDRAW;
return;
}else if ( (CDDS_SUBITEM | CDDS_ITEMPREPAINT) == pLVCD->nmcd.dwDrawStage )
{
// So right now I am in the stage where a SUBITEM is PREPAINTED
int nItem = pLVCD->nmcd.dwItemSpec;
int nSubItem = pLVCD->iSubItem;
char a[100];
listControl.GetItemText(nItem,nSubItem,a,100);
COLORREF textColorFound, textColorDefault;
textColorDefault = RGB(0,0,0);
pLVCD->clrText = textColorDefault;
char* startingFrom;
if( (startingFrom = strstr(a,filterText)) != NULL ) {
// Could I set a pointer here or something like that so
// the coloring could start only from 'startingFrom'
// and stop at 'strlen(filterText)' characters?
textColorFound = RGB(205,92,92);
pLVCD->clrText = textColorFound;
}
*pResult = CDRF_DODEFAULT;
}
}
listControl is the variable for my CListCtrl
the other things are pretty self-explanatory
No, you cannot do this. What you will have to do is custom-draw the text in question. This will be tricky because you will have to do it with two different calls, between which you will have to manually adjust the color and the drawing location to account for the intercharacter spacing etc. And you better hope that you don't need to do multi-line output.
Take a look at the article Neat Stuff to Do in List Controls Using Custom Draw by Michael Dunn on CodeProject to get some ideas on how to proceed.
Alternatively, if you can use the Toolkit Pro toolkit from CodeJock you can leverage their "XAML" support (I use quotes because it's not really XAML, but their own implementation of a subset of XAML) and let them do all the hard work.
Digging on the same issue; But I wouldn't go so far as modifying/adding to the default Windows behaviour for painting strings... apparently that would be the endpoint of having it owner-drawn.(aici am murit si eu :).
i'm trying to simply fill a progress bar, full when a check box is checked, and empty when the box is unchecked. there is an ONCLICK action for the check box, so i figured i would check the value every time it was clicked, and would fill the bar only when it was checked.
this code includes a couple different things i tried, anything with progCtrl gave me a runtime error. any thoughts would be helpful, thanks!
void Cgui1Dlg::OnBnClickedsetkill()
{
// TODO: Add your control notification handler code here
//IDC_PROGRESS.Value = 100;
//CProgressCtrl progCtrl;
//progCtrl.SetDlgCtrlID(IDC_PROGRESS);
//UpdateData();
//if(changefill)
//{
//IDC_PROGRESS.PBM_SETPOS(100);
//SendMessage(IDC_PROGRESS, PBM_SETPOS, 100);
//progCtrl.SetPos(100);
//}
//else
//{
//filled = FALSE;
//}
UpdateData(FALSE);
}
I would create a control variable for the progress control and the check button. Then, do:
void Cgui1Dlg::OnBnClickedsetkill()
{
if(c_Check.GetCheck()==BST_CHECKED)
{
c_Progress.SetPos(100);
}
else
{
c_Progress.SetPos(0);
}
}
I have a menu button inside a CMFCToolbar and I would like to replace the bitmap of the button each time a different entry is selected in the menu as each entry has its own icon.
I succeed in changing the icon using CMFCToolBarMenuButton::SetImage but it changes the icon in the menu entry too. Too bad.
alt text http://www.freeimagehosting.net/uploads/137269b0f2.jpg alt text http://www.freeimagehosting.net/uploads/879d03843a.jpg
Here is a sample of code:
if ( (pToolbar != NULL) && (idBase != 0) )
{
int ixButtonToReplace = pToolbar->CommandToIndex(idBase);
CMFCToolBarMenuButton* pBtnToReplace = dynamic_cast<CMFCToolBarMenuButton*>
(pToolbar->GetButton(ixButtonToReplace));
if ( pBtnToReplace )
{
const CObList& listCommands = pBtnToReplace->GetCommands();
POSITION pos = listCommands.GetHeadPosition();
while ( pos != NULL )
{
CMFCToolBarMenuButton* pItem = (CMFCToolBarMenuButton*) listCommands.GetNext(pos);
if ( pItem && (pItem->m_nID == idButtonToReplaceWith) )
{
pBtnToReplace->SetImage(pItem->GetImage());
}
}
}
}
Any ideas? Thank you.
It works out-of-box. The only you need is to call CMFCToolBar::AddToolBarForImageCollection so MFC could know which images to use.
Not sure what you mean by the menu button is changed too?
If another button is changed with the single setImage call to the obvious indication is they share a resource ID of some sort, the only solution would be to ensure they have different ID's (which would require making sure both resources are handled separately).
But it's a long time since I messed in MFC resource files to confirm this.