callbacks of PtComboBox

QNX Newsgroups (Archives) qdn.public.qnx4.photon
1

Hi all,

I have a PtComboBox as widget with editing enabled and following callbacks:

  • List Item Selected
  • Modify Verify

The problem is that modify_verify is also called when the user selects an
item of the list. Am I assuming right that this is correct behavior since
the selection modifies the text? Can it be avoided and how? When this is not
possible, how can I determine the origin for the modify_verify callback so I
can ignore it and wait for the item_selected callback? Is there a list of
pending callbacks which can be checked?

Thanks for any pointer or help
Markus

2

You can check, if new text is equal to one of items, in ModifyVerify
callback,
and decided there what to do. Here is a code from my program:

int TComboBox :: IsListItem (PtWidget_t *widget, const char *pNewText)
{
TComboBox comboBox (widget);
int n = comboBox.GetItemsCount (); //
Pt_ARG_LIST_ITEM_COUNT
const char **arr = comboBox.GetItemsAddr (); // Pt_ARG_ITEMS

if (pNewText == 0)
pNewText = “”;
int found = 0;
for (int i = 0; found <= 0 && i < n; i ++) {
const char *p = arr ;
if (strcmp (p, pNewText) == 0)
found = 1;
}
return found;
}

V. Ivashko

“Markus Jauslin” <markus.jauslin@ch.mullermartini.com> wrote in message
news:99u4j3$1fl$1@inn.qnx.com…

_Hi all,

I have a PtComboBox as widget with editing enabled and following
callbacks:

  • List Item Selected
  • Modify Verify

    The problem is that modify_verify is also called when the user selects an
    item of the list. Am I assuming right that this is correct behavior since
    the selection modifies the text? Can it be avoided and how? When this is
    not
    possible, how can I determine the origin for the modify_verify callback so
    I
    can ignore it and wait for the item_selected callback? Is there a list of
    pending callbacks which can be checked?

    Thanks for any pointer or help
    Markus_
3

Thanks for your hint. I’m doing this already but for me this is not
satisfactory enough and I’m looking for a more elegant solution.

Markus

V.Ivashko <ivvon@alice.dp.ua> schrieb in im Newsbeitrag:
9aogpl$e8l$1@inn.qnx.com…

You can check, if new text is equal to one of items, in ModifyVerify
callback,
and decided there what to do. Here is a code from my program:

int TComboBox :: IsListItem (PtWidget_t *widget, const char *pNewText)
{
TComboBox comboBox (widget);
int n = comboBox.GetItemsCount (); //
Pt_ARG_LIST_ITEM_COUNT
const char **arr = comboBox.GetItemsAddr (); // Pt_ARG_ITEMS

if (pNewText == 0)
pNewText = “”;
int found = 0;
for (int i = 0; found <= 0 && i < n; i ++) {
const char *p = arr > _;
if (strcmp (p, pNewText) == 0)
found = 1;
}
return found;
}

V. Ivashko

“Markus Jauslin” <> markus.jauslin@ch.mullermartini.com> > wrote in message
news:99u4j3$1fl$> 1@inn.qnx.com> …
Hi all,

I have a PtComboBox as widget with editing enabled and following
callbacks:

  • List Item Selected
  • Modify Verify

    The problem is that modify_verify is also called when the user selects
    an
    item of the list. Am I assuming right that this is correct behavior
    since
    the selection modifies the text? Can it be avoided and how? When this is
    not
    possible, how can I determine the origin for the modify_verify callback
    so
    I
    can ignore it and wait for the item_selected callback? Is there a list
    of
    pending callbacks which can be checked?

    Thanks for any pointer or help
    Markus_

    \
4

The version used is QNX 4.25 and Photon 1.14 Patch C from May 2001 CD.

“Markus Jauslin” <markus.jauslin@ch.mullermartini.com> schrieb im
Newsbeitrag news:9d87th$p90$1@inn.qnx.com…

Thanks for your hint. I’m doing this already but for me this is not
satisfactory enough and I’m looking for a more elegant solution.

Markus

V.Ivashko <> ivvon@alice.dp.ua> > schrieb in im Newsbeitrag:
9aogpl$e8l$> 1@inn.qnx.com> …
You can check, if new text is equal to one of items, in ModifyVerify
callback,
and decided there what to do. Here is a code from my program:

int TComboBox :: IsListItem (PtWidget_t *widget, const char *pNewText)
{
TComboBox comboBox (widget);
int n = comboBox.GetItemsCount (); //
Pt_ARG_LIST_ITEM_COUNT
const char **arr = comboBox.GetItemsAddr (); // Pt_ARG_ITEMS

if (pNewText == 0)
pNewText = “”;
int found = 0;
for (int i = 0; found <= 0 && i < n; i ++) {
const char *p = arr > _;
if (strcmp (p, pNewText) == 0)
found = 1;
}
return found;
}

V. Ivashko

“Markus Jauslin” <> markus.jauslin@ch.mullermartini.com> > wrote in message
news:99u4j3$1fl$> 1@inn.qnx.com> …
Hi all,

I have a PtComboBox as widget with editing enabled and following
callbacks:

  • List Item Selected
  • Modify Verify

    The problem is that modify_verify is also called when the user selects
    an
    item of the list. Am I assuming right that this is correct behavior
    since
    the selection modifies the text? Can it be avoided and how? When this
    is
    not
    possible, how can I determine the origin for the modify_verify
    callback
    so
    I
    can ignore it and wait for the item_selected callback? Is there a list
    of
    pending callbacks which can be checked?

    Thanks for any pointer or help
    Markus_



    \