Refactor child positioning logic

[libs/gltk.git] / source / list.cpp

diff --git a/source/list.cpp b/source/list.cpp
index c5dddf5aaac8533c0f40bec86ed53f7e171c6e37..042eb20ab7b85dbd052d3274351b03287c09614e 100644 (file)
--- a/source/list.cpp
+++ b/source/list.cpp
@@ -78,6 +78,8 @@ void List::autosize_special(const Part &part, Geometry &ageom) const
                ageom.w = max(ageom.w, max_w+margin.left+margin.right);
                ageom.h = max(ageom.h, total_h+margin.top+margin.bottom);
        }
+       else if(part.get_name()=="slider")
+               autosize_child(slider, part, ageom);
 }
 
 void List::set_data(ListData &d)
@@ -121,7 +123,6 @@ List::Item *List::create_item(unsigned index)
        else
                item = new BasicItem(data->get_string(index));
        add(*item);
-       item->autosize();
        item->signal_autosize_changed.connect(sigc::mem_fun(this, &List::item_autosize_changed));
        return item;
 }
@@ -157,6 +158,13 @@ void List::set_selected_index(int i)
        }
 }
 
+void List::rebuild_special(const Part &part)
+{
+       if(part.get_name()=="slider")
+               reposition_child(slider, part);
+       Widget::rebuild_special(part);
+}
+
 void List::render_special(const Part &part, GL::Renderer &renderer) const
 {
        if(part.get_name()=="items")
@@ -184,7 +192,6 @@ void List::button_press(int x, int y, unsigned btn)
 
 void List::on_geometry_change()
 {
-       reposition_slider();
        reposition_items();
 
        check_view_range();
@@ -195,25 +202,11 @@ void List::on_style_change()
        if(!style)
                return;
 
-       reposition_slider();
        reposition_items();
 
        check_view_range();
 }
 
-void List::reposition_slider()
-{
-       if(!style)
-               return;
-
-       if(const Part *slider_part = style->get_part("slider"))
-       {
-               Geometry sgeom = slider_part->get_geometry();
-               slider_part->get_alignment().apply(sgeom, geom, slider_part->get_margin());
-               slider.set_geometry(sgeom);
-       }
-}
-
 void List::item_autosize_changed()
 {
        signal_autosize_changed.emit();
@@ -352,7 +345,8 @@ void List::Item::autosize_special(const Part &part, Geometry &ageom) const
                const Sides &margin = part.get_margin();
                for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
                {
-                       const Geometry &cgeom = (*i)->widget->get_geometry();
+                       Geometry cgeom;
+                       (*i)->widget->autosize(cgeom);
                        ageom.w = max(ageom.w, cgeom.x+cgeom.w+margin.right);
                        ageom.h = max(ageom.h, cgeom.y+cgeom.h+margin.top);
                }
@@ -374,6 +368,72 @@ void List::Item::render_special(const Part &part, GL::Renderer &renderer) const
 }
 
 
+void List::MultiColumnItem::check_widths(vector<unsigned> &widths) const
+{
+       if(widths.size()<children.size())
+               widths.resize(children.size(), 0);
+
+       unsigned n = 0;
+       for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i, ++n)
+       {
+               Geometry cgeom;
+               (*i)->widget->autosize(cgeom);
+               // TODO invent a better way to specify spacings
+               widths[n] = max(widths[n], cgeom.w+8);
+       }
+}
+
+void List::MultiColumnItem::set_widths(const vector<unsigned> &widths)
+{
+       if(!style)
+               return;
+
+       const Part *part = style->get_part("children");
+       if(!part)
+               return;
+
+       const Sides &margin = part->get_margin();
+       int x = margin.left;
+       unsigned n = 0;
+       for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i, ++n)
+       {
+               (*i)->widget->set_position(x, margin.bottom);
+               x += widths[n];
+       }
+}
+
+void List::MultiColumnItem::on_style_change()
+{
+       if(!style)
+               return;
+
+       for(std::list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
+               (*i)->widget->autosize();
+
+       vector<unsigned> widths;
+       List *list = static_cast<List *>(parent);
+       for(vector<Item *>::const_iterator i=list->items.begin(); i!=list->items.end(); ++i)
+               if(*i!=this)
+                       if(MultiColumnItem *mci = dynamic_cast<MultiColumnItem *>(*i))
+                               mci->check_widths(widths);
+
+       vector<unsigned> self_widths(widths);
+       check_widths(self_widths);
+       bool update_all = false;
+       for(unsigned i=0; (!update_all && i<widths.size() && i<self_widths.size()); ++i)
+               update_all = self_widths[i]>widths[i];
+
+       if(update_all)
+       {
+               for(vector<Item *>::const_iterator i=list->items.begin(); i!=list->items.end(); ++i)
+                       if(MultiColumnItem *mci = dynamic_cast<MultiColumnItem *>(*i))
+                               mci->set_widths(self_widths);
+       }
+       else
+               set_widths(self_widths);
+}
+
+
 List::BasicItem::BasicItem(const string &text):
        label(text)
 {