Setting values |
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Develop ActiveX elements -> Example: LatchedSwitch -> Operation and display -> Setting values |
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Setting values |
|
Develop ActiveX elements -> Example: LatchedSwitch -> Operation and display -> Setting values |
|
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A value can be set by clicking the control with the left mouse button. If m_iSollwertDirekt is 0, a dialog for the selection of the set value is opened, otherwise the current value of the switching variable is inverted. If the locking variable has the value 1, only a MessageBeep is executed.No value can be set via the control.
void CLatchedSwitchCtrl::OnLButtonDown(UINT nFlags, CPoint point)
{
CRect rcBounds;
GetWindowRect(&rcBounds);
COleVariant coleValue((BYTE)TRUE);
BOOL bLatch = (BOOL)VariantToDouble((LPVARIANT)&m_dLatchVar.GetValue());
BOOL bSwitch = (BOOL)VariantToDouble((LPVARIANT)&m_dSwitchVar.GetValue());
if (bLatch) // Locked!!!
MessageBeep(MB_ICONEXCLAMATION);
else
{
if (m_sollwertDirekt)
{
bSwitch = !bSwitch;
}
else
{
CSollwertDlg dlg;
dlg.m_iSollwert = bSwitch ? 1 : 0;
if (dlg.DoModal() == IDOK)
{
if (dlg.m_iSollwert == 2) // Toggle
bSwitch = !bSwitch;
else
bSwitch = (BOOL)dlg.m_iSollwert;
}
}
coleValue = (double)bSwitch;
m_dSwitchVar.SetValue(coleValue);
}
COleControl::OnLButtonDown(nFlags, point);
}