if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
return;
- wxPoint pt( GetPosition() );
- wxSize sz( GetSize() );
-
- AdjustForGrowables(sz, m_calculatedMinSize, nrows, ncols);
+ const wxPoint pt(GetPosition());
+ const wxSize sz(GetSize());
- sz = wxSize( pt.x + sz.x, pt.y + sz.y );
+ AdjustForGrowables(sz);
- int x = pt.x;
- for (int c = 0; c < ncols; c++)
+ wxSizerItemList::const_iterator i = m_children.begin();
+ int y = 0;
+ for ( int r = 0; r < nrows; r++ )
{
- int y = pt.y;
- for (int r = 0; r < nrows; r++)
+ if ( m_rowHeights[r] == -1 )
{
- int i = r * ncols + c;
- if (i < nitems)
- {
- wxSizerItemList::compatibility_iterator node = m_children.Item( i );
+ // this row is entirely hidden, skip it
+ for ( int c = 0; c < ncols; c++ )
+ ++i;
- wxASSERT_MSG( node, _T("Failed to find node") );
+ continue;
+ }
- int w = wxMax( 0, wxMin( m_colWidths[c], sz.x - x ) );
- int h = wxMax( 0, wxMin( m_rowHeights[r], sz.y - y ) );
+ const int hrow = m_rowHeights[r];
+ int h = sz.y - y; // max remaining height, don't overflow it
+ if ( hrow < h )
+ h = hrow;
- SetItemBounds( node->GetData(), x, y, w, h);
+ int x = 0;
+ for ( int c = 0; c < ncols; c++, ++i )
+ {
+ const int wcol = m_colWidths[c];
+
+ if ( wcol == -1 )
+ continue;
+
+ // check if there are any remaining children: it may happen that
+ // the last row is incomplete
+ if ( i == m_children.end() )
+ {
+ wxASSERT_MSG( r == nrows - 1, _T("too few items") );
+
+ return;
}
- if (m_rowHeights[r] != -1)
- y = y + m_rowHeights[r] + m_vgap;
+
+ int w = sz.x - x; // max possible value, ensure we don't overflow
+ if ( wcol < w )
+ w = wcol;
+
+ SetItemBounds(*i, pt.x + x, pt.y + y, w, h);
+
+ x += wcol + m_hgap;
+ }
+
+ y += hrow + m_vgap;
+ }
+}
+
+// helper function used in CalcMin() to sum up the sizes of non-hidden items
+static int SumArraySizes(const wxArrayInt& sizes, int gap)
+{
+ // Sum total minimum size, including gaps between rows/columns.
+ // -1 is used as a magic number meaning empty row/column.
+ int total = 0;
+
+ const size_t count = sizes.size();
+ for ( size_t n = 0; n < count; n++ )
+ {
+ if ( sizes[n] != -1 )
+ {
+ if ( total )
+ total += gap; // separate from the previous column
+
+ total += sizes[n];
}
- if (m_colWidths[c] != -1)
- x = x + m_colWidths[c] + m_hgap;
}
+
+ return total;
}
wxSize wxFlexGridSizer::CalcMin()
{
- int nrows,
- ncols;
- size_t i, s;
+ int nrows,
+ ncols;
// Number of rows/columns can change as items are added or removed.
if ( !CalcRowsCols(nrows, ncols) )
return wxSize();
- m_rowHeights.SetCount(nrows);
- m_colWidths.SetCount(ncols);
- // We have to recalcuate the sizes in case the item minimum size has
+ // We have to recalculate the sizes in case the item minimum size has
// changed since the previous layout, or the item has been hidden using
// wxSizer::Show(). If all the items in a row/column are hidden, the final
// dimension of the row/column will be -1, indicating that the column
// itself is hidden.
- for( s = m_rowHeights.GetCount(), i = 0; i < s; ++i )
- m_rowHeights[ i ] = -1;
- for( s = m_colWidths.GetCount(), i = 0; i < s; ++i )
- m_colWidths[ i ] = -1;
-
- wxSizerItemList::compatibility_iterator node = m_children.GetFirst();
+ m_rowHeights.assign(nrows, -1);
+ m_colWidths.assign(ncols, -1);
- i = 0;
- while (node)
+ // n is the index of the item in left-to-right top-to-bottom order
+ size_t n = 0;
+ for ( wxSizerItemList::iterator i = m_children.begin();
+ i != m_children.end();
+ ++i, ++n )
{
- wxSizerItem *item = node->GetData();
+ wxSizerItem * const item = *i;
if ( item->IsShown() )
{
- wxSize sz( item->CalcMin() );
- int row = i / ncols;
- int col = i % ncols;
+ const wxSize sz(item->CalcMin());
- m_rowHeights[ row ] = wxMax( wxMax( 0, sz.y ), m_rowHeights[ row ] );
- m_colWidths[ col ] = wxMax( wxMax( 0, sz.x ), m_colWidths[ col ] );
- }
+ const int row = n / ncols;
+ const int col = n % ncols;
- node = node->GetNext();
- i++;
+ if ( sz.y > m_rowHeights[row] )
+ m_rowHeights[row] = sz.y;
+ if ( sz.x > m_colWidths[col] )
+ m_colWidths[col] = sz.x;
+ }
}
AdjustForFlexDirection();
- // Sum total minimum size, including gaps between rows/columns.
- // -1 is used as a magic number meaning empty column.
- int width = 0;
- for (int col = 0; col < ncols; col++)
- if ( m_colWidths[ col ] != -1 )
- width += m_colWidths[ col ] + m_hgap;
- if (width > 0)
- width -= m_hgap;
-
- int height = 0;
- for (int row = 0; row < nrows; row++)
- if ( m_rowHeights[ row ] != -1 )
- height += m_rowHeights[ row ] + m_vgap;
- if (height > 0)
- height -= m_vgap;
-
- m_calculatedMinSize = wxSize( width, height );
+ m_calculatedMinSize = wxSize(SumArraySizes(m_colWidths, m_hgap),
+ SumArraySizes(m_rowHeights, m_vgap));
+
return m_calculatedMinSize;
}
}
}
-
-void wxFlexGridSizer::AdjustForGrowables(const wxSize& sz, const wxSize& minsz,
- int nrows, int ncols)
+// helper of AdjustForGrowables() which is called for rows/columns separately
+//
+// parameters:
+// delta: the extra space, we do nothing unless it's positive
+// growable: indices or growable rows/cols in sizes array
+// sizes: the height/widths of rows/cols to adjust
+// proportions: proportions of the growable rows/cols or NULL if they all
+// should be assumed to have proportion of 1
+static void
+DoAdjustForGrowables(int delta,
+ const wxArrayInt& growable,
+ wxArrayInt& sizes,
+ const wxArrayInt *proportions)
{
- // what to do with the rows? by default, resize them proportionally
- if ( sz.y > minsz.y && ( (m_flexDirection & wxVERTICAL) || (m_growMode == wxFLEX_GROWMODE_SPECIFIED) ) )
- {
- int sum_proportions = 0;
- int growable_space = 0;
- int num = 0;
- size_t idx;
- for (idx = 0; idx < m_growableRows.GetCount(); idx++)
- {
- // Since the number of rows/columns can change as items are
- // inserted/deleted, we need to verify at runtime that the
- // requested growable rows/columns are still valid.
- if (m_growableRows[idx] >= nrows)
- continue;
+ if ( delta <= 0 )
+ return;
- // If all items in a row/column are hidden, that row/column will
- // have a dimension of -1. This causes the row/column to be
- // hidden completely.
- if (m_rowHeights[ m_growableRows[idx] ] == -1)
- continue;
- sum_proportions += m_growableRowsProportions[idx];
- growable_space += m_rowHeights[ m_growableRows[idx] ];
- num++;
- }
+ // total sum of proportions of all non-hidden rows
+ int sum_proportions = 0;
- if (num > 0)
- {
- for (idx = 0; idx < m_growableRows.GetCount(); idx++)
- {
- if (m_growableRows[idx] >= nrows )
- continue;
- if (m_rowHeights[ m_growableRows[idx] ] != -1)
- {
- int delta = (sz.y - minsz.y);
- if (sum_proportions == 0)
- delta = (delta/num) + m_rowHeights[ m_growableRows[idx] ];
- else
- delta = ((delta+growable_space)*m_growableRowsProportions[idx]) / sum_proportions;
- m_rowHeights[ m_growableRows[idx] ] = delta;
- }
- }
- }
- }
- else if ( (m_growMode == wxFLEX_GROWMODE_ALL) && (sz.y > minsz.y) )
+ // number of currently shown growable rows
+ int num = 0;
+
+ const int max_idx = sizes.size();
+
+ const size_t count = growable.size();
+ size_t idx;
+ for ( idx = 0; idx < count; idx++ )
{
- // rounding problem?
- for ( int row = 0; row < nrows; ++row )
- m_rowHeights[ row ] = sz.y / nrows;
+ // Since the number of rows/columns can change as items are
+ // inserted/deleted, we need to verify at runtime that the
+ // requested growable rows/columns are still valid.
+ if ( growable[idx] >= max_idx )
+ continue;
+
+ // If all items in a row/column are hidden, that row/column will
+ // have a dimension of -1. This causes the row/column to be
+ // hidden completely.
+ if ( sizes[growable[idx]] == -1 )
+ continue;
+
+ if ( proportions )
+ sum_proportions += (*proportions)[idx];
+
+ num++;
}
- // the same logic as above but for the columns
- if ( sz.x > minsz.x && ( (m_flexDirection & wxHORIZONTAL) || (m_growMode == wxFLEX_GROWMODE_SPECIFIED) ) )
+ if ( !num )
+ return;
+
+ // the remaining extra free space, adjusted during each iteration
+ for ( idx = 0; idx < count; idx++ )
{
- int sum_proportions = 0;
- int growable_space = 0;
- int num = 0;
- size_t idx;
- for (idx = 0; idx < m_growableCols.GetCount(); idx++)
- {
- // Since the number of rows/columns can change as items are
- // inserted/deleted, we need to verify at runtime that the
- // requested growable rows/columns are still valid.
- if (m_growableCols[idx] >= ncols)
- continue;
+ if ( growable[idx] >= max_idx )
+ continue;
- // If all items in a row/column are hidden, that row/column will
- // have a dimension of -1. This causes the column to be hidden
- // completely.
- if (m_colWidths[ m_growableCols[idx] ] == -1)
- continue;
- sum_proportions += m_growableColsProportions[idx];
- growable_space += m_colWidths[ m_growableCols[idx] ];
- num++;
- }
+ if ( sizes[ growable[idx] ] == -1 )
+ continue;
- if (num > 0)
+ int cur_delta;
+ if ( sum_proportions == 0 )
{
- for (idx = 0; idx < m_growableCols.GetCount(); idx++)
- {
- if (m_growableCols[idx] >= ncols )
- continue;
- if (m_colWidths[ m_growableCols[idx] ] != -1)
- {
- int delta = (sz.x - minsz.x);
- if (sum_proportions == 0)
- delta = (delta/num) + m_colWidths[ m_growableCols[idx] ];
- else
- delta = ((delta+growable_space)*m_growableColsProportions[idx])/sum_proportions;
- m_colWidths[ m_growableCols[idx] ] = delta;
- }
- }
+ // no growable rows -- divide extra space evenly among all
+ cur_delta = delta/num;
+ num--;
+ }
+ else // allocate extra space proportionally
+ {
+ const int cur_prop = (*proportions)[idx];
+ cur_delta = (delta*cur_prop)/sum_proportions;
+ sum_proportions -= cur_prop;
}
+
+ sizes[growable[idx]] += cur_delta;
+ delta -= cur_delta;
}
- else if ( (m_growMode == wxFLEX_GROWMODE_ALL) && (sz.x > minsz.x) )
+}
+
+void wxFlexGridSizer::AdjustForGrowables(const wxSize& sz)
+{
+ if ( (m_flexDirection & wxVERTICAL) || (m_growMode != wxFLEX_GROWMODE_NONE) )
+ {
+ // pass NULL instead of proportions if the grow mode is ALL as we
+ // should treat all rows as having proportion of 1 then
+ DoAdjustForGrowables
+ (
+ sz.y - m_calculatedMinSize.y,
+ m_growableRows,
+ m_rowHeights,
+ m_growMode == wxFLEX_GROWMODE_SPECIFIED ? &m_growableRowsProportions
+ : NULL
+ );
+ }
+
+ if ( (m_flexDirection & wxHORIZONTAL) || (m_growMode != wxFLEX_GROWMODE_NONE) )
{
- for ( int col=0; col < ncols; ++col )
- m_colWidths[ col ] = sz.x / ncols;
+ DoAdjustForGrowables
+ (
+ sz.x - m_calculatedMinSize.x,
+ m_growableCols,
+ m_colWidths,
+ m_growMode == wxFLEX_GROWMODE_SPECIFIED ? &m_growableColsProportions
+ : NULL
+ );
}
}
projects / wxWidgets.git / commitdiff
