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Demonstrate vetoing wxEVT_SPIN_XXX events in widgets sample

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Show that these events can be vetoed, which prevents the control value
from changing, and also that veto doesn't apply if the event handler
skips the event.

See https://github.com/wxWidgets/wxWidgets/pull/1232
This commit is contained in:
Vadim Zeitlin 2019-02-21 15:10:27 +01:00
parent d9c8932188
commit 85666cd22f
1 changed files with 19 additions and 0 deletions
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19
samples/widgets/spinbtn.cpp
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@ -557,12 +557,31 @@ void SpinBtnWidgetsPage::OnSpinBtn(wxSpinEvent& event)
void SpinBtnWidgetsPage::OnSpinBtnUp(wxSpinEvent& event)
{
// Demonstrate that these events can be vetoed to prevent the control value
// from changing.
if ( event.GetInt() == 11 )
{
wxLogMessage("Spin button prevented from going up to 11 (still %d)",
m_spinbtn->GetValue());
event.Veto();
return;
}
wxLogMessage( "Spin button value incremented, will be %d (was %d)",
event.GetInt(), m_spinbtn->GetValue() );
}
void SpinBtnWidgetsPage::OnSpinBtnDown(wxSpinEvent& event)
{
// Also demonstrate that vetoing the event but then skipping the handler
// doesn't actually apply the veto.
if ( event.GetInt() == 0 )
{
wxLogMessage("Spin button change not effectively vetoed, will become 0");
event.Veto();
event.Skip();
}
wxLogMessage( "Spin button value decremented, will be %d (was %d)",
event.GetInt(), m_spinbtn->GetValue() );
}