C / C++ / MFC

Re: Question about classes in C++

1-Apr-09 3:31

akirilov wrote:
I'm going to use __super, thus It will not depend of the base class name.

But it does tie you to Microsoft's compiler...

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Rajesh R Subramanian1-Apr-09 1:38

Rajesh R Subramanian

1-Apr-09 1:38

Along with other answers, see the __super[^] keyword. You could call a parent class function by __super::FuncName()

[EDIT] OK, I just read you already are going to settle on this keyword. [/EDIT]

It is a crappy thing, but it's life -^ Carlo Pallini

visual C++ to 8051F000 micro controller

ruthlesspker31-Mar-09 22:37

ruthlesspker

31-Mar-09 22:37

hi guys..i have a program that require me to input user input by textbox and output it to a label...but my superviosr wants me to do it on silabs...this means i have to use serial comm to link it...i know the serial comm coding..now i need to know how to output the user input to the label..i try printf(""); and "label1->text= " but it doesnt work..any helps? Dead | X|

Re: visual C++ to 8051F000 micro controller

Cedric Moonen31-Mar-09 23:00

Cedric Moonen

31-Mar-09 23:00

Are you using MFC ? If yes you have to provide a specific Id to your static control in the resource editor. Then you can do something like this (in your dialog class):
GetDlgItem(ID_YOURID)->SetWindowText(_T("Your text here"));

Cédric Moonen
Software developer

Charting control [v1.5]
OpenGL game tutorial in C++

Re: visual C++ to 8051F000 micro controller

CPallini31-Mar-09 23:29

CPallini

31-Mar-09 23:29

ruthlesspker wrote:
hi guys..i have a program that require me to input user input by textbox and output it to a label...but my superviosr wants me to do it on silabs...this means i have to use serial comm to link it...i know the serial comm coding..now i need to know how to output the user input to the label..i try printf(""); and "label1->text= " but it doesnt work..any helps?

How is it related to the microcontroller?

ruthlesspker wrote:
hi guys..i have a program that require me to input user input by textbox and output it to a label...but my superviosr wants me to do it on silabs...

How is it related to the serial communication?

Could you please state more clearly what do you need to do (have you to send the text of an edit box to the microcontroller via the serial port? Should it be formatted in a special way?)?

Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Context menu on non clicnt area

john563231-Mar-09 21:16

john5632

31-Mar-09 21:16

Hi,

I have a list view (Report) with 5 colom, I am using a context menu on clicking on any of the row, but the same context menu is also coming for clicking any of the colom.

How can I prevent it to appear on colom?

Code-o-mat31-Mar-09 22:12

Code-o-mat

31-Mar-09 22:12

I supose you are handling the NM_CLICK or NM_RCLICK notification messages for that, with these you get a NMLISTVIEW[^] structure as parameter, right? I belive in this struct iItem should be -1 if the user did not click on a row.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Life: great graphics, but the gameplay sux. <

Iain Clarke, Warrior Programmer31-Mar-09 22:20

31-Mar-09 22:20

You get a different structure, but the idea is the same.

Iain.

In the process of moving to Sweden for love (awwww).
If you're in Scandinavia and want an MVP on the payroll (or happy with a remote worker), give me a job!

john563231-Mar-09 22:56

john5632

31-Mar-09 22:56

I am Handling WM_CONTEXTMENU

Iain Clarke, Warrior Programmer31-Mar-09 23:09

31-Mar-09 23:09

Then handle NM_RCLICK instead, as I described.

Alternatively, you can use CTreeCtrl::HitTest to get the item under the mouse, but that's more work.

Iain.

In the process of moving to Sweden for love (awwww).
If you're in Scandinavia and want an MVP on the payroll (or happy with a remote worker), give me a job!

john563231-Mar-09 23:23

john5632

31-Mar-09 23:23

Thank you

Iain Clarke, Warrior Programmer31-Mar-09 22:19

31-Mar-09 22:19

Well, that headers for a list view aren't non-client area - that's like the borders and title bars of your applications.

If you right click (I assume right?), then you get a NM_RCLICK notification. When a list view sends it, you also get a pointer to a NMITEMACTIVATE structure. Looking at that structure, you have a iSubItem member - which is the column number.

Try it, and see for yourself. What if gives you when you click on a header, I don't know.

NM_CLICK gives you the same information on a left click - but it would be a bit unusual for a left click to bring up a menu.

Hope that helps,

Iain.

In the process of moving to Sweden for love (awwww).
If you're in Scandinavia and want an MVP on the payroll (or happy with a remote worker), give me a job!

Stuart Dootson31-Mar-09 22:24

31-Mar-09 22:24

Iain Clarke wrote:
NM_CLICK gives you the same information on a left click - but it would be a bit unusual for a left click to bring up a menu.

It certainly wouldn't be the most unusual thing ever seen on this forum...

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Iain Clarke, Warrior Programmer31-Mar-09 22:27

31-Mar-09 22:27

Stuart Dootson wrote:
It certainly wouldn't be the most unusual thing ever seen on this forum...

Talking of which... I haven't seen Carlo yet!

Iain.

In the process of moving to Sweden for love (awwww).
If you're in Scandinavia and want an MVP on the payroll (or happy with a remote worker), give me a job!

how to EXPAND or COLLAPSE a CTreeCtrl item?(TVS_SINGLEEXPAND cannot)

CPallini31-Mar-09 23:40

CPallini

31-Mar-09 23:40

Still wounded Sir, still wounded, indeed... Cry | :((

kaviniswell31-Mar-09 21:02

Re: how to EXPAND or COLLAPSE a CTreeCtrl item?(TVS_SINGLEEXPAND cannot)

31-Mar-09 21:02

hi,
i want to EXPAND/COLLAPSE an COLLAPSE/EXPAND item when i single-click an item。
and the TVS_SINGLEEXPAND style causes the item being selected to expand and the item being unselected to collapse,but i still want the unselected to keep the old state.

now, i map the NM_CLICK:

<br />
void CTreeControlDlg::OnClickTree1(NMHDR* pNMHDR, LRESULT* pResult) <br />
{<br />
    TRACE("OnClickTree1!\n");<br />
    <br />
    HTREEITEM hItem = m_treeCtrl.GetSelectedItem();<br />
    if ( (hItem != NULL) && m_treeCtrl.ItemHasChildren(hItem))<br />
    {<br />
         ... // but i donot how to do now...<br />
    }<br />
    *pResult = 0;<br />
}<br />

thank u very much!!!

Stuart Dootson31-Mar-09 22:03

Re: how to EXPAND or COLLAPSE a CTreeCtrl item?(TVS_SINGLEEXPAND cannot)

31-Mar-09 22:03

CTreeCtrl::Expand[^]?

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

kaviniswell31-Mar-09 22:14

Re: how to EXPAND or COLLAPSE a CTreeCtrl item?(TVS_SINGLEEXPAND cannot)

31-Mar-09 22:14

i do like this, but using <bool bexpand=""> is not a good idea.anybody have the right one?thank u!

void CTreeControlDlg::OnClickTree1(NMHDR* pNMHDR, LRESULT* pResult) 
{
    TRACE("OnClickTree1!\n");
 
    CPoint   pt;   
    GetCursorPos(&pt);   
    m_treeCtrl.ScreenToClient(&pt);   
    
    HTREEITEM   hItem   =   m_treeCtrl.HitTest(pt);
//     HTREEITEM hItem = m_treeCtrl.GetSelectedItem();
    if ( (hItem != NULL) && m_treeCtrl.ItemHasChildren(hItem))
    {    
        static BOOL bExpand = FALSE; // problem: when change to another COLLAPSE item, it will 
                                     // still do the Expand(hItem, TVE_COLLAPSE) code, but not
                                     // do the Expand(hItem, TVE_EXPAND) code.how can i change the
                                     // code? thank u!
        if (bExpand)
        {
            m_treeCtrl.Expand(hItem, TVE_COLLAPSE);
            bExpand = FALSE;
        }
        else
        {
            m_treeCtrl.Expand(hItem, TVE_EXPAND);        
            bExpand = TRUE;
        }
    }

	*pResult = 0;
}

Stuart Dootson31-Mar-09 22:23

Re: how to EXPAND or COLLAPSE a CTreeCtrl item?(TVS_SINGLEEXPAND cannot)

31-Mar-09 22:23

If I'm understanding what you want to do, you can't use that static BOOL bExpand;.

Instead, you need to determine the current state of the item you clicked on. Use CTreeCtrl::GetItemState[^] to determine if the hTreeItem is currently expanded or not, and then act based on that result.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

kaviniswell31-Mar-09 22:41

Re: how to EXPAND or COLLAPSE a CTreeCtrl item?(TVS_SINGLEEXPAND cannot)

31-Mar-09 22:41

thank u !and another problem blew. thank u again!

Iain Clarke, Warrior Programmer31-Mar-09 22:26

Re: how to EXPAND or COLLAPSE a CTreeCtrl item?(TVS_SINGLEEXPAND cannot)

31-Mar-09 22:26

As you've found out, using a static BOOL is a terrible idea. You've found the fatal flaw for yourself.

You can use this to find its current state:

BOOL bExpanded = m_treeCtrl.GetItemState (hItem, TVIS_EXPANDED) == TVIS_EXPANDED;

To check the, erm, expanded state of the given item.

But why are you doing this yourself? This is something the tree can do perfectly well for itself. Just tick the has buttons style, and away you go.

I hope that helps,

Iain.

In the process of moving to Sweden for love (awwww).
If you're in Scandinavia and want an MVP on the payroll (or happy with a remote worker), give me a job!

kaviniswell31-Mar-09 22:40

Re: how to EXPAND or COLLAPSE a CTreeCtrl item?(TVS_SINGLEEXPAND cannot)

31-Mar-09 22:40

yes,my codes belows now. but i found another question now.it is:

for example the tree is:
--root1
  --subitem1
  --subitem2
--root2
  --subitem3

when the focus is on the root1 item,and now i change the focus from root1 to root2, the root2 item doesnot collapse at once, and i hit the item root2 again,it then collapse.and now, can i change the codes below to avoid it?
thank u!

void CTreeControlDlg::OnClickTree1(NMHDR* pNMHDR, LRESULT* pResult) 
{
    TRACE("OnClickTree1!\n");
 
    CPoint   pt;   
    GetCursorPos(&pt);   
    m_treeCtrl.ScreenToClient(&pt);   
    
    HTREEITEM   hItem   =   m_treeCtrl.HitTest(pt);
    if ( (hItem != NULL) && m_treeCtrl.ItemHasChildren(hItem))
    {   
        UINT nState = m_treeCtrl.GetItemState(hItem, TVIS_EXPANDED);
        if (nState & TVIS_EXPANDED)
        {
            m_treeCtrl.Expand(hItem, TVE_COLLAPSE);
        }
        else
        {
            m_treeCtrl.Expand(hItem, TVE_EXPAND);        
        }
    }

	*pResult = 0;
}

kaviniswell31-Mar-09 23:08