From: Mikko Rasa Date: Tue, 11 Jun 2013 19:33:25 +0000 (+0300) Subject: Turn List items into widgets X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=d75275638b2dfeb5e346c42ec2c4498da3671042;p=libs%2Fgltk.git Turn List items into widgets This takes somewhat more resources, but offers much greader flexibility. Items can be styled more freely and can contain pretty much anything. --- diff --git a/source/list.cpp b/source/list.cpp index 8c26ef7..378bf70 100644 --- a/source/list.cpp +++ b/source/list.cpp @@ -30,9 +30,7 @@ void List::init() { sel_index = -1; first = 0; - n_visible = 1; - row_height = 1; - items_part = 0; + max_scroll = 0; observer = new DataObserver(*this); @@ -60,41 +58,25 @@ void List::autosize_rows(unsigned n) Widget::autosize(); - if(items_part) + if(const Part *items_part = style->get_part("items")) { const Sides &margin = items_part->get_margin(); - const GL::Font &font = style->get_font(); - float font_size = style->get_font_size(); unsigned max_w = 0; - unsigned n_items = data->size(); - for(unsigned i=0; i(font.get_string_width(data->get_string(i))*font_size); - max_w = max(max_w, w); + items[i]->autosize(); + const Geometry &igeom = items[i]->get_geometry(); + max_w = max(max_w, igeom.w); + total_h += igeom.h; } - geom.w = max(geom.w, max_w+margin.left+margin.right); - geom.h = max(geom.h, n*row_height+margin.top+margin.bottom); - } + if(items.size()get_part("slider")) - { - Geometry sgeom = slider_part->get_geometry(); - if(!sgeom.w || !sgeom.h) - { - slider.autosize(); - if(!sgeom.w) - sgeom.w = slider.get_geometry().w; - if(!sgeom.h) - sgeom.h = slider.get_geometry().h; - } - - const Sides &margin = slider_part->get_margin(); - geom.w = max(geom.w, sgeom.w+margin.left+margin.right); - geom.h = max(geom.h, sgeom.h+margin.top+margin.bottom); - - reposition_slider(); + geom.w = max(geom.w, max_w+margin.left+margin.right); + geom.h = max(geom.h, total_h+margin.top+margin.bottom); } check_view_range(); @@ -123,105 +105,60 @@ void List::items_changed() { check_view_range(); signal_autosize_changed.emit(); - rebuild(); + reposition_items(); +} + +List::Item *List::create_item(unsigned index) +{ + return new BasicItem(data->get_string(index)); } void List::set_selected_index(int i) { + if(i>static_cast(data->size())) + throw out_of_range("List::set_selected_index"); + + if(sel_index>=0) + items[sel_index]->set_active(false); if(i<0) sel_index = -1; - else if(i(data->size())) + else { sel_index = i; + items[sel_index]->set_active(true); signal_item_selected.emit(sel_index); - rebuild(); } - else - throw out_of_range("List::set_selected_index"); } -void List::rebuild_special(const Part &part, CachedPart &cache) +void List::render_special(const Part &part, GL::Renderer &renderer) const { if(part.get_name()=="items") { - const Sides &margin = part.get_margin(); - Geometry pgeom = geom; - pgeom.h = row_height+margin.top+margin.bottom; - - const GL::Font &font = style->get_font(); - cache.texture = &font.get_texture(); - cache.clear_mesh(); - - GL::MeshBuilder bld(*cache.mesh); - bld.color(style->get_font_color()); - bld.matrix() *= GL::Matrix::translation(margin.left, geom.h-pgeom.h-font.get_descent()*style->get_font_size(), 0); - - for(unsigned i=0; (isize()); ++i) - { - if(i!=0) - bld.matrix() *= GL::Matrix::translation(0, -static_cast(row_height), 0); - - GL::MatrixStack::Push _pushm(bld.matrix()); - bld.matrix() *= GL::Matrix::scaling(style->get_font_size()); - - style->get_font().build_string(data->get_string(first+i), bld); - } + for(unsigned i=first; (iis_visible()); ++i) + items[i]->render(renderer); } - else if(part.get_name()=="selection") - { - if(sel_index>=static_cast(first) && sel_index(first+n_visible)) - { - const Sides &margin = part.get_margin(); - - Geometry pgeom = geom; - pgeom.h = row_height; - pgeom.w -= margin.left+margin.right; - - Geometry rgeom = part.get_geometry(); - rgeom.y += geom.h-margin.top-row_height*(sel_index-first+1); - rgeom.x += margin.left; - part.get_alignment().apply(rgeom, pgeom); - - cache.texture = part.get_graphic(state)->get_texture(); - cache.clear_mesh(); - - GL::MeshBuilder bld(*cache.mesh); - bld.matrix() *= GL::Matrix::translation(rgeom.x, rgeom.y, 0); - part.get_graphic(state)->build(rgeom.w, rgeom.h, bld); - } - else - cache.texture = 0; - } -} - -void List::render_special(const Part &part, GL::Renderer &renderer) const -{ - if(part.get_name()=="slider") + else if(part.get_name()=="slider") slider.render(renderer); } void List::button_press(int x, int y, unsigned btn) { Container::button_press(x, y, btn); - if(!click_focus && btn==1) + if(click_focus && btn==1) { - if(items_part) - y += items_part->get_margin().top; - - unsigned i = (geom.h-1-y)/row_height; - if(isize()) - { - sel_index = first+i; - - signal_item_selected.emit(sel_index); - rebuild(); - } + for(unsigned i=first; (iis_visible()); ++i) + if(click_focus==items[i]) + { + set_selected_index(i); + break; + } } } void List::on_geometry_change() { reposition_slider(); + reposition_items(); check_view_range(); } @@ -229,17 +166,10 @@ void List::on_geometry_change() void List::on_style_change() { if(!style) - { - items_part = 0; return; - } reposition_slider(); - - items_part = style->get_part("items"); - - const GL::Font &font = style->get_font(); - row_height = static_cast((font.get_ascent()-font.get_descent())*style->get_font_size()); + reposition_items(); check_view_range(); } @@ -257,43 +187,78 @@ void List::reposition_slider() } } -void List::check_view_range() +void List::reposition_items() { - unsigned h = geom.h; - if(items_part) + if(!style) + return; + + if(const Part *items_part = style->get_part("items")) { const Sides &margin = items_part->get_margin(); - h -= margin.top+margin.bottom; + unsigned w = geom.w-margin.left-margin.right; + unsigned y = geom.h-margin.top; + for(unsigned i=0; iset_visible(false); + else + { + Geometry igeom = items[i]->get_geometry(); + if(igeom.h+margin.bottom<=y) + { + items[i]->set_visible(true); + y -= igeom.h; + igeom.x = margin.left; + igeom.y = y; + igeom.w = w; + items[i]->set_geometry(igeom); + } + else + { + items[i]->set_visible(false); + y = 0; + } + } + } } +} - n_visible = h/row_height; +void List::check_view_range() +{ + if(!style) + return; - if(first+n_visible>data->size()) + unsigned h = geom.h; + if(const Part *items_part = style->get_part("items")) { - if(data->size()>n_visible) - first = data->size()-n_visible; - else - first = 0; + const Sides &margin = items_part->get_margin(); + h -= margin.top+margin.bottom; } - if(data->size()>n_visible) + max_scroll = items.size(); + for(unsigned i=items.size(); i-->0; ) { - slider.set_range(0, data->size()-n_visible); - slider.set_value(data->size()-n_visible-first); - } - else - { - slider.set_range(0, 0); - slider.set_value(0); + unsigned ih = items[i]->get_geometry().h; + if(ih<=h) + { + h -= ih; + --max_scroll; + } } + + if(first>max_scroll) + first = max_scroll; + + slider.set_range(0, max_scroll); + slider.set_value(max_scroll-first); } void List::slider_value_changed(double value) { - if(data->size()>n_visible) + if(max_scroll>0) { - first = data->size()-n_visible-static_cast(value); - rebuild(); + first = max_scroll-static_cast(value); + reposition_items(); } } @@ -312,6 +277,9 @@ void List::DataObserver::item_added(unsigned i) if(list.sel_index>=static_cast(i)) ++list.sel_index; + Item *item = list.create_item(i); + list.add(*item); + list.items.insert(list.items.begin()+i, item); list.items_changed(); } @@ -322,12 +290,17 @@ void List::DataObserver::item_removed(unsigned i) else if(list.sel_index==static_cast(i)) list.sel_index = -1; + delete list.items[i]; + list.items.erase(list.items.begin()+i); list.items_changed(); } void List::DataObserver::cleared() { list.sel_index = -1; + for(vector::iterator i=list.items.begin(); i!=list.items.end(); ++i) + delete *i; + list.items.clear(); list.items_changed(); } @@ -343,6 +316,58 @@ List::Loader::Loader(List &l): add("item", &Loader::item); } + +void List::Item::autosize() +{ + Widget::autosize(); + + if(const Part *part = style->get_part("children")) + { + const Sides &margin = part->get_margin(); + for(list::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); + } + } +} + +void List::Item::set_active(bool a) +{ + set_state(ACTIVE, (a ? ACTIVE : NORMAL)); +} + +void List::Item::render_special(const Part &part, GL::Renderer &renderer) const +{ + if(part.get_name()=="children") + { + for(list::const_iterator i=children.begin(); i!=children.end(); ++i) + (*i)->widget->render(renderer); + } +} + + +List::BasicItem::BasicItem(const string &text): + label(text) +{ + add(label); +} + +void List::BasicItem::on_style_change() +{ + if(!style) + return; + + label.autosize(); + if(const Part *part = style->get_part("children")) + { + const Sides &margin = part->get_margin(); + label.set_position(margin.left, margin.bottom); + } +} + + void List::Loader::item(const string &v) { dynamic_cast &>(*dynamic_cast(obj).data).append(v); diff --git a/source/list.h b/source/list.h index 1ecd854..caf403a 100644 --- a/source/list.h +++ b/source/list.h @@ -3,6 +3,7 @@ #include #include "container.h" +#include "label.h" #include "listdata.h" #include "vslider.h" @@ -40,6 +41,31 @@ private: void refresh_strings(); }; +protected: + class Item: public Container + { + public: + virtual const char *get_class() const { return "listitem"; } + + virtual void autosize(); + void set_active(bool); + + virtual void render_special(const Part &, GL::Renderer &) const; + }; + +public: + class BasicItem: public Item + { + private: + Label label; + + public: + BasicItem(const std::string &); + + private: + virtual void on_style_change(); + }; + public: sigc::signal signal_item_selected; @@ -49,12 +75,10 @@ private: DataObserver *observer; int sel_index; unsigned first; - unsigned n_visible; - unsigned row_height; - - const Part *items_part; + unsigned max_scroll; VSlider slider; + std::vector items; public: List(); @@ -75,13 +99,14 @@ public: const ListData &get_data() const { return *data; } private: void items_changed(); +protected: + virtual Item *create_item(unsigned); public: void set_selected_index(int); int get_selected_index() const { return sel_index; } private: - virtual void rebuild_special(const Part &, CachedPart &); virtual void render_special(const Part &, GL::Renderer &) const; public: @@ -91,6 +116,7 @@ private: virtual void on_style_change(); void reposition_slider(); + void reposition_items(); void check_view_range(); void slider_value_changed(double); };