1 #include <msp/core/raii.h>
2 #include <msp/debug/demangle.h>
3 #include <msp/gl/matrix.h>
4 #include <msp/gl/meshbuilder.h>
5 #include <msp/input/keys.h>
18 incompatible_data::incompatible_data(const type_info &ti):
19 logic_error("expected "+Debug::demangle(ti.name()))
24 data(new BasicListData<string>),
30 List::List(ListData &d):
39 input_type = INPUT_NAVIGATION;
47 ignore_slider_change = false;
52 observer = new DataObserver(*this);
56 slider.signal_value_changed.connect(sigc::mem_fun(this, &List::slider_value_changed));
67 void List::autosize_special(const Part &part, Geometry &ageom) const
69 if(part.get_name()=="items")
71 const Sides &margin = part.get_margin();
75 for(unsigned i=0; i<items.size(); ++i)
78 items[i]->autosize(igeom);
79 max_w = max(max_w, igeom.w);
80 if(view_size==0 || i<view_size)
84 if(!items.empty() && items.size()<view_size)
85 total_h = total_h*view_size/items.size();
87 ageom.w = max(ageom.w, max_w+margin.left+margin.right);
88 ageom.h = max(ageom.h, total_h+margin.top+margin.bottom);
90 else if(part.get_name()=="slider")
91 autosize_child(slider, part, ageom);
94 void List::set_data(ListData &d)
97 item_factory->set_data(d);
105 observer = new DataObserver(*this);
107 for(vector<Item *>::iterator i=items.begin(); i!=items.end(); ++i)
110 unsigned n_items = data->size();
111 for(unsigned i=0; i<n_items; ++i)
113 Item *item = create_item(i);
114 items.push_back(item);
120 void List::items_changed()
122 signal_autosize_changed.emit();
126 List::Item *List::create_item(unsigned index)
130 item = item_factory->create_item(index);
132 item = new BasicItem(data->get_string(index));
133 if(static_cast<int>(index)==sel_index)
134 item->set_active(true);
137 item->signal_autosize_changed.connect(sigc::bind(sigc::mem_fun(this, &List::item_autosize_changed), item));
141 void List::set_view_size(unsigned s)
144 signal_autosize_changed.emit();
147 void List::set_view_all()
152 void List::set_selected_index(int i)
154 if(i>=static_cast<int>(data->size()))
155 throw out_of_range("List::set_selected_index");
157 if(i==sel_index || (i<0 && sel_index<0))
161 items[sel_index]->set_active(false);
167 signal_selection_cleared.emit();
173 items[sel_index]->set_active(true);
175 set_input_focus(items[focus_index]);
176 signal_item_selected.emit(sel_index);
180 void List::set_selected_item(Widget *item)
182 for(unsigned i=first; (i<items.size() && items[i]->is_visible()); ++i)
184 return set_selected_index(i);
187 void List::rebuild_special(const Part &part)
189 if(part.get_name()=="slider")
190 reposition_child(slider, part);
191 else if(part.get_name()=="items")
193 SetFlag flag(ignore_slider_change);
196 const Sides &margin = part.get_margin();
197 unsigned w = geom.w-min(geom.w, margin.left+margin.right);
198 unsigned y = geom.h-min(geom.h, margin.top);
199 for(unsigned i=0; i<items.size(); ++i)
202 items[i]->set_visible(false);
205 Geometry igeom = items[i]->get_geometry();
206 if(igeom.h+margin.bottom<=y)
208 items[i]->set_visible(true);
210 igeom.x = margin.left;
213 items[i]->set_geometry(igeom);
217 items[i]->set_visible(false);
224 Widget::rebuild_special(part);
227 void List::render_special(const Part &part, GL::Renderer &renderer) const
229 if(part.get_name()=="items")
231 for(unsigned i=first; (i<items.size() && items[i]->is_visible()); ++i)
232 items[i]->render(renderer);
234 else if(part.get_name()=="slider")
235 slider.render(renderer);
238 bool List::key_press(unsigned key, unsigned mod)
240 if(key==Input::KEY_UP && mod==MOD_CTRL)
241 move_focus(NAV_UP, false);
242 else if(key==Input::KEY_DOWN && mod==MOD_CTRL)
243 move_focus(NAV_DOWN, false);
250 void List::button_press(int x, int y, unsigned btn)
257 change = min(first, change);
258 slider.set_value(max_scroll-(first-change));
262 change = min(max_scroll-first, change);
263 slider.set_value(max_scroll-(first+change));
268 Container::button_press(x, y, btn);
269 if(click_focus && btn==1)
270 set_selected_item(click_focus);
274 void List::touch_press(int x, int y, unsigned finger)
284 void List::touch_release(int x, int y, unsigned finger)
288 int dx = x-drag_start_x;
289 int dy = y-drag_start_y;
292 Container::touch_press(drag_start_x, drag_start_y, finger);
294 set_selected_item(touch_focus);
295 Container::touch_motion(x, y, finger);
296 Container::touch_release(x, y, finger);
302 void List::touch_motion(int, int y, unsigned finger)
304 if(finger==0 && !items.empty() && dragging)
306 int dy = y-drag_start_y;
307 if(dy>0 && first<max_scroll)
309 int item_h = items[first]->get_geometry().h;
312 drag_start_y += item_h;
313 slider.set_value(max_scroll-(first+1));
316 else if(dy<0 && first>0)
318 int item_h = items[first-1]->get_geometry().h;
321 drag_start_y -= item_h;
322 slider.set_value(max_scroll-(first-1));
328 void List::focus_in()
330 Container::focus_in();
331 if(focus_index>=0 && items[focus_index]->is_visible())
332 set_input_focus(items[focus_index]);
335 if(sel_index>=0 && items[sel_index]->is_visible())
336 set_focus_index(sel_index);
337 else if(!items.empty())
338 set_focus_index(first);
342 bool List::navigate(Navigation nav)
344 if((nav==NAV_UP || nav==NAV_DOWN) && !items.empty())
345 move_focus(nav, true);
346 else if(nav==NAV_ACTIVATE)
347 set_selected_index(focus_index);
354 void List::move_focus(Navigation nav, bool select)
359 set_focus_index(focus_index-1);
361 else if(nav==NAV_DOWN)
363 if(static_cast<unsigned>(focus_index+1)<items.size())
364 set_focus_index(focus_index+1);
368 set_selected_index(focus_index);
371 void List::set_focus_index(int i)
378 set_input_focus(items[focus_index]);
382 void List::item_autosize_changed(Item *item)
385 signal_autosize_changed.emit();
389 unsigned List::last_to_first(unsigned last) const
394 unsigned view_h = geom.h;
395 if(const Part *items_part = style->get_part("items"))
397 const Sides &margin = items_part->get_margin();
398 view_h -= margin.top+margin.bottom;
401 unsigned items_h = 0;
402 for(unsigned i=last; i<items.size(); --i)
404 items_h += items[i]->get_geometry().h;
406 return min(i+1, last);
412 void List::check_view_range()
420 max_scroll = last_to_first(items.size()-1);
425 slider.set_range(0, max_scroll);
426 slider.set_value(max_scroll-first);
429 void List::scroll_to_focus()
431 if(focus_index<0 || items[focus_index]->is_visible())
434 if(static_cast<unsigned>(focus_index)<first)
435 slider.set_value(max_scroll-focus_index);
437 slider.set_value(max_scroll-last_to_first(focus_index));
440 void List::slider_value_changed(double value)
442 if(max_scroll>0 && !ignore_slider_change)
444 first = max_scroll-static_cast<unsigned>(value);
449 void List::adjust_index(int &index, int pos, int change)
454 index = (change>0 ? index+change : -1);
458 List::DataObserver::DataObserver(List &l):
461 list.data->signal_item_added.connect(sigc::mem_fun(this, &DataObserver::item_added));
462 list.data->signal_item_removed.connect(sigc::mem_fun(this, &DataObserver::item_removed));
463 list.data->signal_cleared.connect(sigc::mem_fun(this, &DataObserver::cleared));
464 list.data->signal_refresh_item.connect(sigc::mem_fun(this, &DataObserver::refresh_item));
467 void List::DataObserver::item_added(unsigned i)
469 adjust_index(list.sel_index, i, 1);
470 adjust_index(list.focus_index, i, 1);
472 Item *item = list.create_item(i);
473 list.items.insert(list.items.begin()+i, item);
474 list.items_changed();
477 void List::DataObserver::item_removed(unsigned i)
479 bool had_selection = (list.sel_index>=0);
480 adjust_index(list.sel_index, i, -1);
481 adjust_index(list.focus_index, i, -1);
483 delete list.items[i];
484 list.items.erase(list.items.begin()+i);
485 list.items_changed();
487 if(had_selection && list.sel_index<0)
488 list.signal_selection_cleared.emit();
491 void List::DataObserver::cleared()
494 list.focus_index = -1;
495 for(vector<Item *>::iterator i=list.items.begin(); i!=list.items.end(); ++i)
498 list.items_changed();
500 list.signal_selection_cleared.emit();
503 void List::DataObserver::refresh_item(unsigned i)
505 delete list.items[i];
506 // Avoid stale pointer while create_item is executing
508 list.items[i] = list.create_item(i);
509 list.items_changed();
513 void List::Item::autosize_special(const Part &part, Geometry &ageom) const
515 if(part.get_name()=="children")
517 const Sides &margin = part.get_margin();
518 for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
521 (*i)->widget->autosize(cgeom);
522 ageom.w = max(ageom.w, cgeom.x+cgeom.w+margin.right);
523 ageom.h = max(ageom.h, cgeom.y+cgeom.h+margin.top);
528 void List::Item::set_active(bool a)
530 set_state(ACTIVE, (a ? ACTIVE : NORMAL));
533 void List::Item::render_special(const Part &part, GL::Renderer &renderer) const
535 if(part.get_name()=="children")
537 for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
538 (*i)->widget->render(renderer);
543 void List::MultiColumnItem::check_widths(vector<unsigned> &widths) const
545 if(widths.size()<children.size())
546 widths.resize(children.size(), 0);
549 for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i, ++n)
552 (*i)->widget->autosize(cgeom);
553 // TODO invent a better way to specify spacings
554 widths[n] = max(widths[n], cgeom.w+8);
558 void List::MultiColumnItem::set_widths(const vector<unsigned> &widths)
563 const Part *part = style->get_part("children");
567 const Sides &margin = part->get_margin();
570 for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i, ++n)
572 (*i)->widget->set_position(x, margin.bottom);
577 void List::MultiColumnItem::on_style_change()
582 for(std::list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
583 (*i)->widget->autosize();
585 vector<unsigned> widths;
586 List *list = static_cast<List *>(parent);
587 for(vector<Item *>::const_iterator i=list->items.begin(); i!=list->items.end(); ++i)
589 if(MultiColumnItem *mci = dynamic_cast<MultiColumnItem *>(*i))
590 mci->check_widths(widths);
592 vector<unsigned> self_widths(widths);
593 check_widths(self_widths);
594 bool update_all = false;
595 for(unsigned i=0; (!update_all && i<widths.size() && i<self_widths.size()); ++i)
596 update_all = self_widths[i]>widths[i];
600 for(vector<Item *>::const_iterator i=list->items.begin(); i!=list->items.end(); ++i)
601 if(MultiColumnItem *mci = dynamic_cast<MultiColumnItem *>(*i))
602 mci->set_widths(self_widths);
605 set_widths(self_widths);
609 List::BasicItem::BasicItem(const string &text):
615 void List::BasicItem::on_style_change()
621 if(const Part *part = style->get_part("children"))
623 const Sides &margin = part->get_margin();
624 label.set_position(margin.left, margin.bottom);
629 List::Loader::Loader(List &l):
630 DataFile::DerivedObjectLoader<List, Widget::Loader>(l)
632 add("item", &Loader::item);
633 add("view_size", &List::view_size);
636 void List::Loader::item(const string &v)
638 dynamic_cast<BasicListData<string> &>(*obj.data).append(v);