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get grid layout working

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This commit is contained in:
Paul Davis 2017-01-15 12:11:25 +00:00
parent 04e346a3d8
commit 7c17327f56
1 changed files with 25 additions and 4 deletions
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29
libs/canvas/grid.cc
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@ -25,6 +25,8 @@
using namespace ArdourCanvas;
using std::vector;
using std::max;
using std::cerr;
using std::endl;
Grid::Grid (Canvas* canvas)
: Item (canvas)
@ -173,6 +175,12 @@ Grid::reposition_children ()
max_row = max (max_row, (uint32_t) c->second.y);
}
cerr << "max row = " << max_row << " max_col " << max_col << endl;
cerr << "with items = " << _items.size() << " coords " << coords_by_item.size()<< endl;
max_row++;
max_col++;
/* Now compute the width of the widest child for each column, and the
* height of the tallest child for each row.
*/
@ -180,20 +188,23 @@ Grid::reposition_children ()
vector<double> row_dimens;
vector<double> col_dimens;
row_dimens.assign (0, max_row);
col_dimens.assign (0, max_col);
row_dimens.assign (max_row, 0);
col_dimens.assign (max_col, 0);
for (std::list<Item*>::iterator i = _items.begin(); ++i != _items.end(); ++i) {
boost::optional<Rect> bb = (*i)->bounding_box();
if (!bb) {
cerr << "no bounding box\n";
continue;
}
CoordsByItem::const_iterator c = coords_by_item.find (*i);
row_dimens[c->second.x] = max (row_dimens[c->second.x], bb.get().width());
col_dimens[c->second.y] = max (col_dimens[c->second.y], bb.get().height());
cerr << "item BB = " << bb.get() << endl;
row_dimens[c->second.y] = max (row_dimens[c->second.y], bb.get().height());
col_dimens[c->second.x] = max (col_dimens[c->second.x] , bb.get().width());
}
/* now sum the row and column widths, so that row_dimens is transformed
@ -207,6 +218,7 @@ Grid::reposition_children ()
for (uint32_t n = 1; n < max_row; ++n) {
row_dimens[n] = row_dimens[n-1] + prev;
cerr << "B: row[" << n << "] @ " << row_dimens[n] << endl;
prev = row_dimens[n];
}
@ -215,6 +227,7 @@ Grid::reposition_children ()
for (uint32_t n = 1; n < max_col; ++n) {
col_dimens[n] = col_dimens[n-1] + prev;
cerr << "B: col[" << n << "] @ " << col_dimens[n] << endl;
prev = col_dimens[n];
}
@ -226,13 +239,19 @@ Grid::reposition_children ()
CoordsByItem::const_iterator c = coords_by_item.find (*i);
if (c == coords_by_item.end()) {
cerr << "item not found\n";
continue;
}
cerr << " place item at " << Duple (col_dimens[c->second.x], row_dimens[c->second.y]) << endl;
(*i)->set_position (Duple (col_dimens[c->second.x], row_dimens[c->second.y]));
}
_bounding_box_dirty = true;
reset_self ();
}
@ -241,11 +260,13 @@ Grid::place (Item* i, Duple at)
{
add (i);
coords_by_item.insert (std::make_pair (i, at));
reposition_children ();
}
void
Grid::child_changed ()
{
cerr << "Child changed!\n";
/* catch visibility and size changes */
Item::child_changed ();