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fix keyboard navigation in radio boxes containing hidden or disabled items

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@54930 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin 2008-08-02 19:45:23 +00:00
parent 8758875e0b
commit 05d31b3aca
2 changed files with 90 additions and 79 deletions
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3
include/wx/radiobox.h
View File

@ -49,7 +49,8 @@ public:
unsigned int GetColumnCount() const { return m_numCols; }
unsigned int GetRowCount() const { return m_numRows; }
// return the item above/below/to the left/right of the given one
// return the next active (i.e. shown and not disabled) item above/below/to
// the left/right of the given one
int GetNextItem(int item, wxDirection dir, long style) const;
#if wxUSE_TOOLTIPS

166
src/common/radiocmn.cpp
View File

@ -64,96 +64,106 @@ void wxRadioBoxBase::SetMajorDim(unsigned int majorDim, long style)
int wxRadioBoxBase::GetNextItem(int item, wxDirection dir, long style) const
{
const int itemStart = item;
int count = GetCount(),
numCols = GetColumnCount(),
numRows = GetRowCount();
bool horz = (style & wxRA_SPECIFY_COLS) != 0;
switch ( dir )
do
{
case wxUP:
if ( horz )
{
item -= numCols;
}
else // vertical layout
{
if ( !item-- )
item = count - 1;
}
break;
switch ( dir )
{
case wxUP:
if ( horz )
{
item -= numCols;
}
else // vertical layout
{
if ( !item-- )
item = count - 1;
}
break;
case wxLEFT:
if ( horz )
{
if ( !item-- )
item = count - 1;
}
else // vertical layout
{
item -= numRows;
}
break;
case wxLEFT:
if ( horz )
{
if ( !item-- )
item = count - 1;
}
else // vertical layout
{
item -= numRows;
}
break;
case wxDOWN:
if ( horz )
{
item += numCols;
}
else // vertical layout
{
if ( ++item == count )
item = 0;
}
break;
case wxDOWN:
if ( horz )
{
item += numCols;
}
else // vertical layout
{
if ( ++item == count )
item = 0;
}
break;
case wxRIGHT:
if ( horz )
{
if ( ++item == count )
item = 0;
}
else // vertical layout
{
item += numRows;
}
break;
case wxRIGHT:
if ( horz )
{
if ( ++item == count )
item = 0;
}
else // vertical layout
{
item += numRows;
}
break;
default:
wxFAIL_MSG( _T("unexpected wxDirection value") );
return wxNOT_FOUND;
default:
wxFAIL_MSG( _T("unexpected wxDirection value") );
return wxNOT_FOUND;
}
// ensure that the item is in range [0..count)
if ( item < 0 )
{
// first map the item to the one in the same column but in the last
// row
item += count;
// now there are 2 cases: either it is the first item of the last
// row in which case we need to wrap again and get to the last item
// or we can just go to the previous item
if ( item % (horz ? numCols : numRows) )
item--;
else
item = count - 1;
}
else if ( item >= count )
{
// same logic as above
item -= count;
// ... except that we need to check if this is not the last item,
// not the first one
if ( (item + 1) % (horz ? numCols : numRows) )
item++;
else
item = 0;
}
wxASSERT_MSG( item < count && item >= 0,
_T("logic error in wxRadioBox::GetNextItem()") );
}
// ensure that the item is in range [0..count)
if ( item < 0 )
{
// first map the item to the one in the same column but in the last row
item += count;
// now there are 2 cases: either it is the first item of the last row
// in which case we need to wrap again and get to the last item or we
// can just go to the previous item
if ( item % (horz ? numCols : numRows) )
item--;
else
item = count - 1;
}
else if ( item >= count )
{
// same logic as above
item -= count;
// ... except that we need to check if this is not the last item, not
// the first one
if ( (item + 1) % (horz ? numCols : numRows) )
item++;
else
item = 0;
}
wxASSERT_MSG( item < count && item >= 0,
_T("logic error in wxRadioBox::GetNextItem()") );
// we shouldn't select the non-active items, continue looking for a
// visible and shown one unless we came back to the item we started from in
// which case bail out to avoid infinite loop
while ( !(IsItemShown(item) && IsItemEnabled(item)) && item != itemStart );
return item;
}