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 max_h = max(max_h, igeom.h);
83 unsigned total_h = max_h*(view_size==0 ? items.size() : view_size);
85 ageom.w = max(ageom.w, max_w+margin.left+margin.right);
86 ageom.h = max(ageom.h, total_h+margin.top+margin.bottom);
88 else if(part.get_name()=="slider")
89 autosize_child(slider, part, ageom);
92 void List::set_data(ListData &d)
95 item_factory->set_data(d);
103 observer = new DataObserver(*this);
105 for(vector<Item *>::iterator i=items.begin(); i!=items.end(); ++i)
108 unsigned n_items = data->size();
109 for(unsigned i=0; i<n_items; ++i)
111 Item *item = create_item(i);
112 items.push_back(item);
118 void List::items_changed()
120 signal_autosize_changed.emit();
124 List::Item *List::create_item(unsigned index)
128 item = item_factory->create_item(index);
130 item = new BasicItem(data->get_string(index));
131 if(static_cast<int>(index)==sel_index)
132 item->set_active(true);
135 item->signal_autosize_changed.connect(sigc::bind(sigc::mem_fun(this, &List::item_autosize_changed), item));
139 void List::set_view_size(unsigned s)
142 signal_autosize_changed.emit();
145 void List::set_view_all()
150 void List::set_selected_index(int i)
152 if(i>=static_cast<int>(data->size()))
153 throw out_of_range("List::set_selected_index");
155 if(i==sel_index || (i<0 && sel_index<0))
159 items[sel_index]->set_active(false);
165 signal_selection_cleared.emit();
171 items[sel_index]->set_active(true);
173 set_input_focus(items[focus_index]);
174 signal_item_selected.emit(sel_index);
178 void List::set_selected_item(Widget *item)
180 for(unsigned i=first; (i<items.size() && items[i]->is_visible()); ++i)
182 return set_selected_index(i);
185 void List::rebuild_special(const Part &part)
187 if(part.get_name()=="slider")
188 reposition_child(slider, part);
189 else if(part.get_name()=="items")
191 SetFlag flag(ignore_slider_change);
194 const Sides &margin = part.get_margin();
195 unsigned w = geom.w-min(geom.w, margin.left+margin.right);
196 unsigned y = geom.h-min(geom.h, margin.top);
197 for(unsigned i=0; i<items.size(); ++i)
200 items[i]->set_visible(false);
203 Geometry igeom = items[i]->get_geometry();
204 if(igeom.h+margin.bottom<=y)
206 items[i]->set_visible(true);
208 igeom.x = margin.left;
211 items[i]->set_geometry(igeom);
215 items[i]->set_visible(false);
222 Widget::rebuild_special(part);
225 void List::render_special(const Part &part, GL::Renderer &renderer) const
227 if(part.get_name()=="items")
229 for(unsigned i=first; (i<items.size() && items[i]->is_visible()); ++i)
230 items[i]->render(renderer);
232 else if(part.get_name()=="slider")
233 slider.render(renderer);
236 bool List::key_press(unsigned key, unsigned mod)
238 if(key==Input::KEY_UP && mod==MOD_CTRL)
239 move_focus(NAV_UP, false);
240 else if(key==Input::KEY_DOWN && mod==MOD_CTRL)
241 move_focus(NAV_DOWN, false);
248 void List::button_press(int x, int y, unsigned btn)
255 change = min(first, change);
256 slider.set_value(max_scroll-(first-change));
260 change = min(max_scroll-first, change);
261 slider.set_value(max_scroll-(first+change));
266 Container::button_press(x, y, btn);
267 if(click_focus && btn==1)
268 set_selected_item(click_focus);
272 void List::touch_press(int x, int y, unsigned finger)
282 void List::touch_release(int x, int y, unsigned finger)
286 int dx = x-drag_start_x;
287 int dy = y-drag_start_y;
290 Container::touch_press(drag_start_x, drag_start_y, finger);
292 set_selected_item(touch_focus);
293 Container::touch_motion(x, y, finger);
294 Container::touch_release(x, y, finger);
300 void List::touch_motion(int, int y, unsigned finger)
302 if(finger==0 && !items.empty() && dragging)
304 int dy = y-drag_start_y;
305 if(dy>0 && first<max_scroll)
307 int item_h = items[first]->get_geometry().h;
310 drag_start_y += item_h;
311 slider.set_value(max_scroll-(first+1));
314 else if(dy<0 && first>0)
316 int item_h = items[first-1]->get_geometry().h;
319 drag_start_y -= item_h;
320 slider.set_value(max_scroll-(first-1));
326 void List::focus_in()
328 Container::focus_in();
329 if(focus_index>=0 && items[focus_index]->is_visible())
330 set_input_focus(items[focus_index]);
333 if(sel_index>=0 && items[sel_index]->is_visible())
334 set_focus_index(sel_index);
335 else if(!items.empty())
336 set_focus_index(first);
340 bool List::navigate(Navigation nav)
342 if((nav==NAV_UP || nav==NAV_DOWN) && !items.empty())
343 move_focus(nav, true);
344 else if(nav==NAV_ACTIVATE)
345 set_selected_index(focus_index);
352 void List::move_focus(Navigation nav, bool select)
357 set_focus_index(focus_index-1);
359 else if(nav==NAV_DOWN)
361 if(static_cast<unsigned>(focus_index+1)<items.size())
362 set_focus_index(focus_index+1);
366 set_selected_index(focus_index);
369 void List::set_focus_index(int i)
376 set_input_focus(items[focus_index]);
380 void List::item_autosize_changed(Item *item)
383 signal_autosize_changed.emit();
387 unsigned List::last_to_first(unsigned last) const
392 unsigned view_h = geom.h;
393 if(const Part *items_part = style->get_part("items"))
395 const Sides &margin = items_part->get_margin();
396 view_h -= margin.top+margin.bottom;
399 unsigned items_h = 0;
400 for(unsigned i=last; i<items.size(); --i)
402 items_h += items[i]->get_geometry().h;
404 return min(i+1, last);
410 void List::check_view_range()
418 max_scroll = last_to_first(items.size()-1);
423 slider.set_range(0, max_scroll);
424 slider.set_value(max_scroll-first);
427 void List::scroll_to_focus()
429 if(focus_index<0 || items[focus_index]->is_visible())
432 if(static_cast<unsigned>(focus_index)<first)
433 slider.set_value(max_scroll-focus_index);
435 slider.set_value(max_scroll-last_to_first(focus_index));
438 void List::slider_value_changed(double value)
440 if(max_scroll>0 && !ignore_slider_change)
442 first = max_scroll-static_cast<unsigned>(value);
447 void List::adjust_index(int &index, int pos, int change)
452 index = (change>0 ? index+change : -1);
456 List::DataObserver::DataObserver(List &l):
459 list.data->signal_item_added.connect(sigc::mem_fun(this, &DataObserver::item_added));
460 list.data->signal_item_removed.connect(sigc::mem_fun(this, &DataObserver::item_removed));
461 list.data->signal_cleared.connect(sigc::mem_fun(this, &DataObserver::cleared));
462 list.data->signal_refresh_item.connect(sigc::mem_fun(this, &DataObserver::refresh_item));
465 void List::DataObserver::item_added(unsigned i)
467 adjust_index(list.sel_index, i, 1);
468 adjust_index(list.focus_index, i, 1);
470 Item *item = list.create_item(i);
471 list.items.insert(list.items.begin()+i, item);
472 list.items_changed();
475 void List::DataObserver::item_removed(unsigned i)
477 bool had_selection = (list.sel_index>=0);
478 adjust_index(list.sel_index, i, -1);
479 adjust_index(list.focus_index, i, -1);
481 delete list.items[i];
482 list.items.erase(list.items.begin()+i);
483 list.items_changed();
485 if(had_selection && list.sel_index<0)
486 list.signal_selection_cleared.emit();
489 void List::DataObserver::cleared()
492 list.focus_index = -1;
493 for(vector<Item *>::iterator i=list.items.begin(); i!=list.items.end(); ++i)
496 list.items_changed();
498 list.signal_selection_cleared.emit();
501 void List::DataObserver::refresh_item(unsigned i)
503 delete list.items[i];
504 // Avoid stale pointer while create_item is executing
506 list.items[i] = list.create_item(i);
507 list.items_changed();
511 void List::Item::autosize_special(const Part &part, Geometry &ageom) const
513 if(part.get_name()=="children")
515 const Sides &margin = part.get_margin();
516 for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
519 (*i)->widget->autosize(cgeom);
520 ageom.w = max(ageom.w, cgeom.x+cgeom.w+margin.right);
521 ageom.h = max(ageom.h, cgeom.y+cgeom.h+margin.top);
526 void List::Item::set_active(bool a)
528 set_state(ACTIVE, (a ? ACTIVE : NORMAL));
531 void List::Item::render_special(const Part &part, GL::Renderer &renderer) const
533 if(part.get_name()=="children")
535 for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
536 (*i)->widget->render(renderer);
541 void List::MultiColumnItem::check_widths(vector<unsigned> &widths) const
543 if(widths.size()<children.size())
544 widths.resize(children.size(), 0);
547 for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i, ++n)
550 (*i)->widget->autosize(cgeom);
551 // TODO invent a better way to specify spacings
552 widths[n] = max(widths[n], cgeom.w+8);
556 void List::MultiColumnItem::set_widths(const vector<unsigned> &widths)
561 const Part *part = style->get_part("children");
565 const Sides &margin = part->get_margin();
568 for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i, ++n)
570 (*i)->widget->set_position(x, margin.bottom);
575 void List::MultiColumnItem::on_style_change()
580 for(std::list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
581 (*i)->widget->autosize();
583 vector<unsigned> widths;
584 List *list = static_cast<List *>(parent);
585 for(vector<Item *>::const_iterator i=list->items.begin(); i!=list->items.end(); ++i)
587 if(MultiColumnItem *mci = dynamic_cast<MultiColumnItem *>(*i))
588 mci->check_widths(widths);
590 vector<unsigned> self_widths(widths);
591 check_widths(self_widths);
592 bool update_all = false;
593 for(unsigned i=0; (!update_all && i<widths.size() && i<self_widths.size()); ++i)
594 update_all = self_widths[i]>widths[i];
598 for(vector<Item *>::const_iterator i=list->items.begin(); i!=list->items.end(); ++i)
599 if(MultiColumnItem *mci = dynamic_cast<MultiColumnItem *>(*i))
600 mci->set_widths(self_widths);
603 set_widths(self_widths);
607 List::BasicItem::BasicItem(const string &text):
613 void List::BasicItem::on_style_change()
619 if(const Part *part = style->get_part("children"))
621 const Sides &margin = part->get_margin();
622 label.set_position(margin.left, margin.bottom);
627 List::Loader::Loader(List &l):
628 DataFile::DerivedObjectLoader<List, Widget::Loader>(l)
630 add("item", &Loader::item);
631 add("view_size", &List::view_size);
634 void List::Loader::item(const string &v)
636 dynamic_cast<BasicListData<string> &>(*obj.data).append(v);