Make autosize_special const and add a const autosize overload

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

diff --git a/source/list.cpp b/source/list.cpp
index 4ce35e266f4418accb2b9b2716480dc1451f20ad..461d5e425c3076426f8ad51029ee971825cf396f 100644 (file)
--- a/source/list.cpp
+++ b/source/list.cpp
@@ -1,3 +1,4 @@
+#include <msp/debug/demangle.h>
 #include <msp/gl/matrix.h>
 #include <msp/gl/meshbuilder.h>
 #include "graphic.h"
@@ -12,6 +13,11 @@ using namespace std;
 namespace Msp {
 namespace GLtk {
 
+incompatible_data::incompatible_data(const type_info &ti):
+       logic_error("expected "+Debug::demangle(ti.name()))
+{ }
+
+
 List::List():
        data(new BasicListData<string>),
        own_data(true)
@@ -28,9 +34,11 @@ List::List(ListData &d):
 
 void List::init()
 {
+       item_factory = 0;
        sel_index = -1;
        first = 0;
        max_scroll = 0;
+       view_size = 5;
 
        observer = new DataObserver(*this);
 
@@ -41,55 +49,41 @@ void List::init()
 
 List::~List()
 {
+       delete item_factory;
        delete observer;
        if(own_data)
                delete data;
 }
 
-void List::autosize()
-{
-       autosize_rows(5);
-}
-
-void List::autosize_rows(unsigned n)
+void List::autosize_special(const Part &part, Geometry &ageom) const
 {
-       if(!style)
-               return;
-
-       Widget::autosize();
-
-       if(const Part *items_part = style->get_part("items"))
+       if(part.get_name()=="items")
        {
-               const Sides &margin = items_part->get_margin();
+               const Sides &margin = part.get_margin();
 
                unsigned max_w = 0;
                unsigned total_h = 0;
-               for(unsigned i=0; (i<n && i<items.size()); ++i)
+               for(unsigned i=0; i<items.size(); ++i)
                {
-                       items[i]->autosize();
                        const Geometry &igeom = items[i]->get_geometry();
                        max_w = max(max_w, igeom.w);
-                       total_h += igeom.h;
+                       if(view_size==0 || i<view_size)
+                               total_h += igeom.h;
                }
 
-               if(items.size()<n)
-                       total_h = total_h*n/items.size();
+               if(!items.empty() && items.size()<view_size)
+                       total_h = total_h*view_size/items.size();
 
-               geom.w = max(geom.w, max_w+margin.left+margin.right);
-               geom.h = max(geom.h, total_h+margin.top+margin.bottom);
+               ageom.w = max(ageom.w, max_w+margin.left+margin.right);
+               ageom.h = max(ageom.h, total_h+margin.top+margin.bottom);
        }
-
-       check_view_range();
-       rebuild();
-}
-
-void List::autosize_all()
-{
-       autosize_rows(data->size());
 }
 
 void List::set_data(ListData &d)
 {
+       if(item_factory)
+               item_factory->set_data(d);
+
        delete observer;
        if(own_data)
                delete data;
@@ -98,6 +92,16 @@ void List::set_data(ListData &d)
        own_data = false;
        observer = new DataObserver(*this);
 
+       for(vector<Item *>::iterator i=items.begin(); i!=items.end(); ++i)
+               delete *i;
+       items.clear();
+       unsigned n_items = data->size();
+       for(unsigned i=0; i<n_items; ++i)
+       {
+               Item *item = create_item(i);
+               items.push_back(item);
+       }
+
        items_changed();
 }
 
@@ -110,14 +114,36 @@ void List::items_changed()
 
 List::Item *List::create_item(unsigned index)
 {
-       return new BasicItem(data->get_string(index));
+       Item *item = 0; 
+       if(item_factory)
+               item = item_factory->create_item(index);
+       else
+               item = new BasicItem(data->get_string(index));
+       add(*item);
+       item->autosize();
+       item->signal_autosize_changed.connect(sigc::bind(sigc::mem_fun(this, &List::item_autosize_changed), item));
+       return item;
+}
+
+void List::set_view_size(unsigned s)
+{
+       view_size = s;
+       signal_autosize_changed.emit();
+}
+
+void List::set_view_all()
+{
+       set_view_size(0);
 }
 
 void List::set_selected_index(int i)
 {
-       if(i>static_cast<int>(data->size()))
+       if(i>=static_cast<int>(data->size()))
                throw out_of_range("List::set_selected_index");
 
+       if(i==sel_index)
+               return;
+
        if(sel_index>=0)
                items[sel_index]->set_active(false);
        if(i<0)
@@ -187,6 +213,13 @@ void List::reposition_slider()
        }
 }
 
+void List::item_autosize_changed(Item *item)
+{
+       signal_autosize_changed.emit();
+       item->autosize();
+       reposition_items();
+}
+
 void List::reposition_items()
 {
        if(!style)
@@ -269,7 +302,7 @@ List::DataObserver::DataObserver(List &l):
        list.data->signal_item_added.connect(sigc::mem_fun(this, &DataObserver::item_added));
        list.data->signal_item_removed.connect(sigc::mem_fun(this, &DataObserver::item_removed));
        list.data->signal_cleared.connect(sigc::mem_fun(this, &DataObserver::cleared));
-       list.data->signal_refresh_strings.connect(sigc::mem_fun(this, &DataObserver::refresh_strings));
+       list.data->signal_refresh_item.connect(sigc::mem_fun(this, &DataObserver::refresh_item));
 }
 
 void List::DataObserver::item_added(unsigned i)
@@ -278,7 +311,6 @@ void List::DataObserver::item_added(unsigned i)
                ++list.sel_index;
 
        Item *item = list.create_item(i);
-       list.add(*item);
        list.items.insert(list.items.begin()+i, item);
        list.items_changed();
 }
@@ -304,24 +336,24 @@ void List::DataObserver::cleared()
        list.items_changed();
 }
 
-void List::DataObserver::refresh_strings()
+void List::DataObserver::refresh_item(unsigned i)
 {
+       delete list.items[i];
+       list.items[i] = list.create_item(i);
        list.items_changed();
 }
 
 
-void List::Item::autosize()
+void List::Item::autosize_special(const Part &part, Geometry &ageom) const
 {
-       Widget::autosize();
-
-       if(const Part *part = style->get_part("children"))
+       if(part.get_name()=="children")
        {
-               const Sides &margin = part->get_margin();
+               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();
-                       geom.w = max(geom.w, cgeom.x+cgeom.w+margin.right);
-                       geom.h = max(geom.h, cgeom.y+cgeom.h+margin.top);
+                       ageom.w = max(ageom.w, cgeom.x+cgeom.w+margin.right);
+                       ageom.h = max(ageom.h, cgeom.y+cgeom.h+margin.top);
                }
        }
 }
@@ -365,6 +397,7 @@ List::Loader::Loader(List &l):
        DataFile::DerivedObjectLoader<List, Widget::Loader>(l)
 {
        add("item", &Loader::item);
+       add("view_size", &List::view_size);
 }
 
 void List::Loader::item(const string &v)