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added Previous() and ResetToLast() to the Enumerator

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This commit is contained in:
pierre%netscape.com 1998-10-16 09:18:03 +00:00
parent 4a42999db9
commit 26526207cf
2 changed files with 31 additions and 0 deletions
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29
widget/src/xpwidgets/nsBaseWidget.cpp
View File

@ -452,6 +452,24 @@ nsISupports* nsBaseWidget::Enumerator::Next()
return NULL;
}
//-------------------------------------------------------------------------
//
// Get enumeration previous element. Return null at the end
//
//-------------------------------------------------------------------------
nsISupports* nsBaseWidget::Enumerator::Previous()
{
if (mCurrentPosition > 0) {
mCurrentPosition--;
nsIWidget* widget = (nsIWidget*)mChildren.ElementAt(mCurrentPosition);
NS_IF_ADDREF(widget);
return widget;
}
return NULL;
}
//-------------------------------------------------------------------------
//
@ -464,6 +482,17 @@ void nsBaseWidget::Enumerator::Reset()
}
//-------------------------------------------------------------------------
//
// Reset enumerator internal pointer to the end
//
//-------------------------------------------------------------------------
void nsBaseWidget::Enumerator::ResetToLast()
{
mCurrentPosition = mChildren.Count();
}
//-------------------------------------------------------------------------
//
// Append an element

2
widget/src/xpwidgets/nsBaseWidget.h
View File

@ -118,7 +118,9 @@ protected:
~Enumerator();
NS_IMETHOD_(nsISupports*) Next();
NS_IMETHOD_(nsISupports*) Previous();
NS_IMETHOD_(void) Reset();
NS_IMETHOD_(void) ResetToLast();
void Append(nsIWidget* aWidget);
void Remove(nsIWidget* aWidget);