source/panel.cpp

   1 #include <algorithm>
   2 #include <msp/core/maputils.h>
   3 #include <msp/core/refptr.h>
   4 #include "button.h"
   5 #include "column.h"
   6 #include "draghandle.h"
   7 #include "dropdown.h"
   8 #include "entry.h"
   9 #include "grid.h"
  10 #include "hslider.h"
  11 #include "image.h"
  12 #include "indicator.h"
  13 #include "label.h"
  14 #include "list.h"
  15 #include "panel.h"
  16 #include "part.h"
  17 #include "row.h"
  18 #include "stack.h"
  19 #include "toggle.h"
  20 #include "vslider.h"
  21
  22 using namespace std;
  23
  24 namespace Msp {
  25 namespace GLtk {
  26
  27 Panel::Panel():
  28         layout(0)
  29 {
  30         input_type = INPUT_NAVIGATION;
  31 }
  32
  33 Panel::~Panel()
  34 {
  35         delete layout;
  36         layout = 0;
  37 }
  38
  39 void Panel::set_layout(Layout *l)
  40 {
  41         l->set_container(*this);
  42         delete layout;
  43         layout = l;
  44 }
  45
  46 void Panel::autosize_special(const Part &part, Geometry &ageom) const
  47 {
  48         if(part.get_name()=="children" && layout)
  49                 layout->autosize(ageom);
  50 }
  51
  52 void Panel::render_special(const Part &part, GL::Renderer &renderer) const
  53 {
  54         if(part.get_name()=="children")
  55         {
  56                 for(list<Container::Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
  57                         if((*i)->widget->is_visible())
  58                                 (*i)->widget->render(renderer);
  59         }
  60 }
  61
  62 bool Panel::navigate(Navigation nav)
  63 {
  64         if(Container::navigate(nav))
  65                 return true;
  66
  67         if(nav==NAV_UP || nav==NAV_DOWN || nav==NAV_LEFT || nav==NAV_RIGHT)
  68         {
  69                 int nav_x = (nav==NAV_RIGHT ? 1 : nav==NAV_LEFT ? -1 : 0);
  70                 int nav_y = (nav==NAV_UP ? 1 : nav==NAV_DOWN ? -1 : 0);
  71
  72                 int origin_x, origin_y, origin_dim;
  73                 if(input_focus)
  74                 {
  75                         const Geometry &fgeom = input_focus->get_geometry();
  76                         origin_x = fgeom.x+(nav_x*0.5+0.5)*fgeom.w;
  77                         origin_y = fgeom.y+(nav_y*0.5+0.5)*fgeom.h;
  78                         origin_dim = abs(nav_x)*fgeom.h+abs(nav_y)*fgeom.w;
  79                 }
  80                 else
  81                 {
  82                         origin_x = geom.w*(0.5-nav_x*0.5);
  83                         origin_y = geom.h*(0.5-nav_y*0.5);
  84                         origin_dim = abs(nav_x)*geom.h+abs(nav_y)*geom.w;
  85                 }
  86
  87                 if(pointer_grabbed && pointer_focus==input_focus)
  88                         return false;
  89
  90                 Widget *sibling = find_next_child(origin_x, origin_y, origin_dim, nav_x, nav_y);
  91                 if(!sibling && input_focus)
  92                 {
  93                         const Geometry &fgeom = input_focus->get_geometry();
  94                         origin_x -= fgeom.w*(nav_x*0.5);
  95                         origin_y -= fgeom.h*(nav_y*0.5);
  96                         sibling = find_next_child(origin_x, origin_y, origin_dim, nav_x, nav_y);
  97                 }
  98
  99                 if(sibling)
 100                 {
 101                         set_input_focus(sibling);
 102                         if(Panel *panel = dynamic_cast<Panel *>(sibling))
 103                                 panel->navigate(nav);
 104                         return true;
 105                 }
 106         }
 107
 108         return false;
 109 }
 110
 111 Widget *Panel::find_next_child(int origin_x, int origin_y, int origin_dim, int nav_x, int nav_y) const
 112 {
 113         Widget *sibling = 0;
 114         int best_score = 0;
 115         for(list<Child *>::const_iterator i=children.begin(); i!=children.end(); ++i)
 116         {
 117                 if((*i)->widget==input_focus || !(*i)->widget->is_focusable())
 118                         continue;
 119
 120                 const Geometry &cgeom = (*i)->widget->get_geometry();
 121                 int dx = compute_delta(cgeom.x, cgeom.w, origin_x, origin_dim, nav_x);
 122                 int dy = compute_delta(cgeom.y, cgeom.h, origin_y, origin_dim, nav_y);
 123
 124                 int score = -1;
 125                 if(nav_y && nav_y*dy>=0)
 126                         score = nav_y*dy+abs(dx)*4;
 127                 else if(nav_x && nav_x*dx>=0)
 128                         score = nav_x*dx+abs(dy)*4;
 129
 130                 if(score>=0 && (!sibling || score<best_score))
 131                 {
 132                         sibling = (*i)->widget;
 133                         best_score = score;
 134                 }
 135         }
 136
 137         return sibling;
 138 }
 139
 140 int Panel::compute_delta(int pos, int dim, int origin_pos, int origin_dim, int nav)
 141 {
 142         if(nav<0)
 143                 return pos+dim-origin_pos;
 144         else if(nav>0)
 145                 return pos-origin_pos;
 146         else if(pos+dim<origin_pos-origin_dim/2)
 147                 return pos+dim+origin_dim/2-origin_pos;
 148         else if(pos>origin_pos+origin_dim/2)
 149                 return pos-origin_pos-origin_dim/2;
 150         else
 151                 return 0;
 152 }
 153
 154 void Panel::on_geometry_change()
 155 {
 156         if(layout)
 157                 layout->update();
 158 }
 159
 160 void Panel::on_child_added(Widget &wdg)
 161 {
 162         if(layout)
 163         {
 164                 layout->add_widget(wdg);
 165                 signal_autosize_changed.emit();
 166         }
 167 }
 168
 169 void Panel::on_child_removed(Widget &wdg)
 170 {
 171         if(layout)
 172         {
 173                 layout->remove_widget(wdg);
 174                 signal_autosize_changed.emit();
 175         }
 176 }
 177
 178
 179 Panel::Loader::Loader(Panel &p, map<string, Widget *> &m):
 180         DataFile::DerivedObjectLoader<Panel, Widget::Loader>(p),
 181         wdg_map(m),
 182         last_widget(0)
 183 {
 184         add_child_type<Button>("button");
 185         add("column",    &Loader::arrangement<Column>);
 186         add("constraint",&Loader::constraint);
 187         add_child_type<DragHandle>("draghandle");
 188         add_child_type<Dropdown>("dropdown");
 189         add_child_type<Entry>("entry");
 190         add("expand",    &Loader::expand);
 191         add("ghost",     &Loader::ghost);
 192         add("gravity",   &Loader::gravity);
 193         add("grid",      &Loader::grid);
 194         add_child_type<HSlider>("hslider");
 195         add_child_type<Image>("image");
 196         add_child_type<Indicator>("indicator");
 197         add_child_type<Label>("label");
 198         add("layout",    &Loader::layout);
 199         add_child_type<List>("list");
 200         add_child_type<Panel>("panel");
 201         add("row",       &Loader::arrangement<Row>);
 202         add("stack",     &Loader::arrangement<Stack>);
 203         add_child_type<Toggle>("toggle");
 204         add_child_type<VSlider>("vslider");
 205 }
 206
 207 template<typename T>
 208 void Panel::Loader::add_child_type(const string &keyword)
 209 {
 210         add(keyword, &Loader::child<T>);
 211         add(keyword, &Loader::unnamed_child<T>);
 212 }
 213
 214 Layout &Panel::Loader::get_layout()
 215 {
 216         if(!obj.layout)
 217                 obj.set_layout(new Layout);
 218
 219         return *obj.layout;
 220 }
 221
 222 Widget &Panel::Loader::get_last_widget()
 223 {
 224         if(!last_widget)
 225                 throw logic_error("no widget loaded");
 226
 227         return *last_widget;
 228 }
 229
 230 template<typename T>
 231 void Panel::Loader::arrangement()
 232 {
 233         T arr(get_layout());
 234         ArrangedLoader<T> ldr(*this, arr);
 235         load_sub_with(ldr);
 236 }
 237
 238 template<typename T>
 239 void Panel::Loader::child(const string &n)
 240 {
 241         unnamed_child<T>();
 242         wdg_map[n] = last_widget;
 243 }
 244
 245 void Panel::Loader::constraint(Layout::ConstraintType type, const string &n)
 246 {
 247         Widget &src = get_last_widget();
 248         Widget &tgt = *get_item(wdg_map, n);
 249         get_layout().add_constraint(src, type, tgt);
 250 }
 251
 252 void Panel::Loader::expand(bool h, bool v)
 253 {
 254         get_layout().set_expand(get_last_widget(), h, v);
 255 }
 256
 257 void Panel::Loader::ghost(bool g)
 258 {
 259         get_layout().set_ghost(get_last_widget(), g);
 260 }
 261
 262 void Panel::Loader::gravity(int h, int v)
 263 {
 264         get_layout().set_gravity(get_last_widget(), h, v);
 265 }
 266
 267 void Panel::Loader::grid(unsigned cols)
 268 {
 269         Grid grd(get_layout(), cols);
 270         ArrangedLoader<Grid> ldr(*this, grd);
 271         load_sub_with(ldr);
 272 }
 273
 274 void Panel::Loader::layout()
 275 {
 276         Layout::Loader ldr(get_layout(), wdg_map);
 277         load_sub_with(ldr);
 278 }
 279
 280 template<typename T>
 281 void Panel::Loader::unnamed_child()
 282 {
 283         RefPtr<T> chl = new T();
 284         load_sub(*chl);
 285         obj.add(*chl.get());
 286         last_widget = chl.release();
 287 }
 288
 289 template<>
 290 void Panel::Loader::unnamed_child<Panel>()
 291 {
 292         RefPtr<Panel> pnl = new Panel();
 293         load_sub(*pnl, wdg_map);
 294         obj.add(*pnl.get());
 295         last_widget = pnl.release();
 296 }
 297
 298 template<typename T>
 299 Panel::ArrangedLoader<T>::ArrangedLoader(Loader &ldr, T &arr):
 300         arr_loader(arr)
 301 {
 302         add_auxiliary_loader(ldr);
 303         add_auxiliary_loader(arr_loader);
 304 }
 305
 306 } // namespace GLtk
 307 } // namespace Msp