Exceptions with zero height page

[Unregistered]

Hi,

I've set the page height to zero (I didn't mean this, it was actually my mistake) and the control had accepted this. I could then insert some text and it was OK as long as it fit on the page (probably of height before change). But when I instered some text which forced the control to create a new page, it crashed with unrecoverable exception.

Regards,
Cezariusz Marek


This message was originally posted by Cezariusz Marek in the old TX Text Control Support Forum.

[Björn Meyer]

Hello Marek

I tried to reproduce this issue, but unfortunately without success. I have simply created a TX Text Control on a form and set the page size to 0 (which is default). I have typed some text up to the end of the visible control area (BTW: If the page size is not set, the control doesn't work page oriented). It is not possible to enter more text which is intented, but I am not able to reproduce a crash of the control. Do you have a sample which shows me the problem?

Thank you very much for your help.

Björn Meyer, TX Text Control
bjoern@textcontrol.com


This message was originally posted by Björn Meyer in the old TX Text Control Support Forum.

[Unregistered]

Hello,

I cannot send you a sample right now, because TX control is used in our report engine. But the sequence, extracted from the source, is like this:

m_TextControl.LoadFile(strFileName);
CRect rcMargins;
m_TextControl.GetDocumentMargins(rcMargins);
if (!rcMargins.IsRectNull() && (rcMargins != CRect(-1, -1, -1, -1)))
{
m_TextControl.SetPageMargins(rcMargins);
}
CSize szPage;
m_TextControl.GetDocumentPageSize(szPage);
if (szPage != CSize(0, 0))
{
CSize areaSize(szPage.cx - rcMargins.left - rcMargins.right,
szPage.cy - rcMargins.top - rcMargins.bottom);
m_TextControl.SetPageSize(areaSize, TF_PAGEVIEW, TF_NOHSCROLL | TF_NOVSCROLL);
}

In a previous version I've made a mistake, and area size was calculated like this:

CSize areaSize = (szPage.cx - rcMargins.left - rcMargins.right,
szPage.cy - rcMargins.top - rcMargins.bottom);

so it was equal to:

CSize areaSize(szPage.cx - rcMargins.left - rcMargins.right, 0);

Then engine fills marked field with data:

int nFieldCurrent = m_TextControl.FieldGetNext(0, 0);
CString strData;
while (nFieldCurrent)
{
m_TextControl.FieldGetData(nFieldCurrent, strData);
if (strData == strFieldName)
{
if (m_TextControl.FieldChangeText(nFieldCurrent, strValue))
{
bRet = TRUE;
}
}
nFieldCurrent = m_TextControl.FieldGetNext(0, nFieldCurrent);
}

One of FieldChangeText call caused GPF, probably the one which moved some text to a new page.

I can send you executable demo of this error, but I cannot send you the whole source code.

Cezariusz Marek


This message was originally posted by Cezariusz Marek in the old TX Text Control Support Forum.