I am new to MFC & BGCControlBar.
Now I plan to use CBCGPListCtrl which is defined as:
class BCGCBPRODLLEXPORT CBCGPListCtrl : public CListCtrl
&
CBCGPListCtrl m_wndWatch;
Now in the demo code I plan to change:
int CWatchBar::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CBCGPDockingControlBar::OnCreate(lpCreateStruct) == -1)
return -1;
m_Font.CreateStockObject (DEFAULT_GUI_FONT);
CRect rectDummy;
rectDummy.SetRectEmpty ();
// Create output pane:
const DWORD dwStyle = WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS | WS_VSCROLL | LVS_REPORT | LVS_EDITLABELS ;
m_wndWatch.Create (dwStyle, rectDummy, this, ID_LIST_1);
m_wndWatch.SendMessage (LVM_SETEXTENDEDLISTVIEWSTYLE, 0,
LVS_EX_FULLROWSELECT | LVS_EX_GRIDLINES);
m_wndWatch.InsertColumn (0, _T("Variable"), LVCFMT_LEFT, 100);
m_wndWatch.InsertColumn (1, _T("Value"), LVCFMT_LEFT, 100);
m_wndWatch.InsertItem (0, _T("m_nCount"));
m_wndWatch.SetItemText (0, 1, _T("100"));
m_wndWatch.SetFont (&m_Font);
return 0;
}
What I get is a list(as in pic), I can only edit the 1st colum and the data can not be retained. How can I edit the second column text and make the data retainable?
You need a grid control rather than a CListCtrl (or derived class). Actually, it's possible to add support for edition in other columns but it's a looooooot of work and not the kind of thing I'd recommend to a newcomer.
According to this page of their web site, they have a grid control.
There are a few things you need to do in order to make a MFC CListCtrl editable. This is a very broad overview without going into too many details:
As mentioned above it is quite a bit of work and you need to derive a class from CListCtrl, since CListCtrl by itself does not allow you to explicitly edit all of the columns.
You need a routine that will calculate the row/column number of the particular cell you clicked on, given a cursor position CPoint.
In the derived CListCtrl class you also need a method to edit the selected cell, creating and making visible a CEdit control of the appropriate size.
Create a derived CEdit control, such that it sends the LVN_ENDLABELEDIT message and self-destructs upon completion.
An example Visual Studio 2010 project implementing an editable list control is downloadable from this site:
http://www.technical-recipes.com/2014/making-a-mfc-list-control-editable/
Upon running/debugging the example, you get an example dialog project implementing an editable list control as shown:
Related
I am really struggling how to make a window with three selections of options. I currently have a setup that uses a CFileDialog object and have successfully implemented two dropdown menus and multiple check items.
What I want is to implement a pop up window that has the two drop down menus and the check boxes. If a certain item is selected in one of the dropdown menus then the file dialog is opened.
Currently I am trying to make a CWnd object and try to write code for it there.
CWnd myWindow;
BOOL VALUE = myWindow.Create(_T("DesktopApp"), _T("test"), WS_VISIBLE | WS_BORDER | WS_CAPTION,
RECT{ 100,100,400,400 },
myWindow.GetDesktopWindow(), 12);
myWindow.ShowWindow(SW_SHOWNORMAL);
if (VALUE == FALSE) {
return 0;
}
Every time I run this, it prematurely returns (VALUE == FALSE). Did I do something wrong? Is there a simpler way to create a window?
The first argument to CWnd::Create is the window class name. A class with the requested name must have been registered before it can be created.
It is common to register an application local class for the application's main window. MFC provides a convenient wrapper function (AfxRegisterWndClass) to register a window class.
I'm fairly new to MFC and would like to create an SDI application that has a pane of tabs always embedded on the right of the window with a view left of it. In my app I have a calculation core, with variables that are changed in the tabs with edit boxes. I would like to initialise these variables in the calculation class and then during the initialisation of the dialogs used for tabs set the initial values in the edit boxes to those of the corresponding variable in the calculator.
Currently, I create an instance of the calculator in my document class.
I also create a CTabbedPane in the MainFrame OnCreate Method as follows:
m_TabbedPane.Create(_T(""), this, CRect(0, 0, 290, 200),
TRUE,
(UINT)-1,
WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS |
WS_CLIPCHILDREN | CBRS_RIGHT |
CBRS_FLOAT_MULTI))
m_tab = new CParametersDlg();
m_tab->Create(IDD_TAB, this);
m_TabbedPane.AddTab(m_tab);
I would the like to be able in CParameterDlg's OnInitDialog do something like:
BOOL CParameterDlg::OnInitDialog() {
CDialog::OnInitDialog()
float value = pointerToDocument->GetCalculatorVariable();
And use value to initialise an edit box. However I can't access the document from in the main frames OnCreate as it returns null (using GetActiveDocument, AfxGetApp etc).
How can I initialise the tabs then? I have thought about trying to put the Calculator in the App class instead. Or possibly trying to initialise the dialogs somewhere else which is called later when the document is properly initialised and linked? Or should I be doing things entirely differently?
I think that CMainFrame::OnCreate() is too early in the sequence of events to access the document class, it would not normally be created yet.
It would be better to wait until the docuent is created / initialised, the document class could then call a new method in CMainFrame() passing this as a parameter to create the tabs.
I'm working on a program, which should list all files and it's size(for now...). I created a simple application, which should write the data to a listbox. I'm trying to write the data in two columns(the first should be the name, and next to it, in an other column, it's size), but i can't figure out, how should i do this.
Can someone help me?
Thanks in advance!
kampi
Update:
I try to use ListControl., but unfortunately i can't. I can succesfully compile my App, but i can only see, the empty rectangle. Does someone know what i am doing wrong?
BOOL CGetFileListDlg::OnInitDialog()
{
CDialog::OnInitDialog();
// Set the icon for this dialog. The framework does this automatically
// when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE); // Set big icon
SetIcon(m_hIcon, FALSE); // Set small icon
// TODO: Add extra initialization here
LVITEM lvItem;
LVCOLUMN lvColumn;
int nCol;
lvColumn.mask = LVCF_FMT | LVCF_TEXT | LVCF_WIDTH;
lvColumn.fmt = LVCFMT_CENTER;
lvColumn.cx = 10;
lvColumn.pszText = _T("Filename");
ListView_InsertColumn( m_List, 0, &lvColumn );
ListView_SetItemText( m_List, 0, 0, _T("TEST") );
return TRUE; // return TRUE unless you set the focus to a control
}
The list box control does support multiple columns, but it only supports a single series of entries; the multiple column support just makes the items continue onto the next columns so that vertical scrolling is not necessary.
As Kornel has suggested, a list view control may be more appropriate. After creating a list view control, use ListView_InsertColumn to create the columns. Then use ListView_SetItemText to insert items.
EDIT:
My apoligies; you should use ListView_InsertItem to insert an item (a row) and then use ListView_SetItemText to alter the subitems (columns). If the list view is still just a blank box without any headings, have you initialised common controls? This can be done using InitCommonControlsEx, specifying the ICC_LISTVIEW_CLASSES constant. This should be done before creating the control.
See Microsoft's documentation on list view controls.
Don't use a List Box, use a List Control with LVS_REPORT style.
Maybe to use DataGridView with object as data source.
Three important parameters to be checked are
List Box or the List Control (List Control is to be used)
View parameter must be Report mode
Owner Data must be set to False
The screenshot shows these
The programming flow to add data to list control are Change the list Control to extended list view(ListView_SetExtendedListViewStyle), Create the layout(By adding columns), Add Item data (for each row needed) & add finally add sub-item to each column (for each item data added previously).
How to create dynamic MFC controls and handle message maps of the controls at runtime?
It really depends on which controls do you want to create, especially if you want to know which flags should you set. In general it goes down to this:
Normally a CWnd-derived control is created using Create or CreateEx. For a CButton, for instance:
CButton button;
button.Create("Button text", WS_CHILD | WS_VISIBLE | WS_TABSTOP | BS_PUSHBUTTON | DT_CENTER, CRect(5, 5, 55, 19), this, nID);
where the CRect specifies the button position, this is a pointer to the parent window, and nID is the control ID.
If the control doesn't come out as expected, it's probably because some flags are missing. I suggest you draw a sample control in design mode, check out the code for that control in the RC file, and copy the flags to the Create caller.
As for the message maps, they are normally routed to the parent window. The nID value you used in Create is important here, because it will be the number that identifies the control in the message map. If you have a fixed number of controls, you can hard-code the nID numbers for your controls (starting at 10000, for instance); if not, you'll have to provide a way for the parent window to identify them. Then you just add the message map entries.
ON_BN_CLICKED(10000, OnBnClicked)
ON_CONTROL_RANGE(BN_CLICKED, 10010, 10020, OnBtnsClicked)
You can use the ON_CONTROL_RANGE message map to map a range of IDs to the same function.
In a Win32 application I have a dialog with a list control which is defined is the dialog template:
CONTROL "",IDC_LIST_Attributes,"SysListView32",LVS_REPORT |
LVS_SINGLESEL | LVS_ALIGNLEFT | WS_BORDER | WS_TABSTOP,7,36,246,110
In the runtime I retrieve the handle to that control and perform different operations with it - remove all items, add items, etc. It works fine.
The problem is I can't programmatically mark an item as selected. I use the following code for that:
LVITEM lvItem;
lvItem.stateMask = stateMask;
lvItem.state = state;
SendMessage( windowHandle, LVM_SETITEMSTATE, indexToSelect, (LPARAM)&lvItem);
This code runs and no changes happen to the list control. when I clisk on items with a mouse they are selected allright. What am I missing?
Have you tried ListView_SetItemState Macro?
From the MSDN Link:
Items will only show as selected if
the list-view control has focus or the
LVS_SHOWSELALWAYS style is used.
Another Link that my help.