qcsrc/menu/item/modalcontroller.c

   1 #ifdef INTERFACE
   2 CLASS(ModalController) EXTENDS(Container)
   3         METHOD(ModalController, resizeNotify, void(entity, vector, vector, vector, vector))
   4         METHOD(ModalController, draw, void(entity))
   5         METHOD(ModalController, addItem, void(entity, entity, vector, vector, float))
   6         METHOD(ModalController, showChild, void(entity, entity, vector, vector, float))
   7         METHOD(ModalController, hideChild, void(entity, entity, float))
   8         METHOD(ModalController, hideAll, void(entity, float))
   9         METHOD(ModalController, addItem, void(entity, entity, vector, vector, float))
  10         METHOD(ModalController, addTab, void(entity, entity, entity))
  11
  12         METHOD(ModalController, initializeDialog, void(entity, entity))
  13
  14         METHOD(ModalController, switchState, void(entity, entity, float, float))
  15         ATTRIB(ModalController, origin, vector, '0 0 0')
  16         ATTRIB(ModalController, size, vector, '0 0 0')
  17         ATTRIB(ModalController, previousButton, entity, NULL)
  18         ATTRIB(ModalController, fadedAlpha, float, 0.3)
  19 ENDCLASS(ModalController)
  20
  21 .entity tabSelectingButton;
  22 .vector origin;
  23 .vector size;
  24 void TabButton_Click(entity button, entity tab); // assumes a button has set the above fields to its own absolute origin, its size, and the tab to activate
  25 void DialogOpenButton_Click(entity button, entity tab); // assumes a button has set the above fields to its own absolute origin, its size, and the tab to activate
  26 void DialogOpenButton_Click_withCoords(entity button, entity tab, vector theOrigin, vector theSize);
  27 void DialogCloseButton_Click(entity button, entity tab); // assumes a button has set the above fields to the tab to close
  28 #endif
  29
  30 #ifdef IMPLEMENTATION
  31
  32 // modal dialog controller
  33 // handles a stack of dialog elements
  34 // each element can have one of the following states:
  35 //   0: hidden (fading out)
  36 //   1: visible (zooming in)
  37 //   2: greyed out (inactive)
  38 // While an animation is running, no item has focus. When an animation is done,
  39 // the topmost item gets focus.
  40 // The items are assumed to be added in overlapping order, that is, the lowest
  41 // window must get added first.
  42 //
  43 // Possible uses:
  44 // - to control a modal dialog:
  45 //   - show modal dialog: me.showChild(me, childItem, buttonAbsOrigin, buttonAbsSize, 0) // childItem also gets focus
  46 //   - dismiss modal dialog: me.hideChild(me, childItem, 0) // childItem fades out and relinquishes focus
  47 //   - show first screen in m_show: me.hideAll(me, 1); me.showChild(me, me.firstChild, '0 0 0', '0 0 0', 1);
  48 // - to show a temporary dialog instead of the menu (teamselect): me.hideAll(me, 1); me.showChild(me, teamSelectDialog, '0 0 0', '0 0 0', 1);
  49 // - as a tabbed dialog control:
  50 //   - to initialize: me.hideAll(me, 1); me.showChild(me, me.firstChild, '0 0 0', '0 0 0', 1);
  51 //   - to show a tab: me.hideChild(me, currentTab, 0); me.showChild(me, newTab, buttonAbsOrigin, buttonAbsSize, 0);
  52
  53 .vector ModalController_initialSize;
  54 .vector ModalController_initialOrigin;
  55 .vector ModalController_initialFontScale;
  56 .float ModalController_initialAlpha;
  57 .vector ModalController_buttonSize;
  58 .vector ModalController_buttonOrigin;
  59 .float ModalController_state;
  60 .float ModalController_factor;
  61 .entity ModalController_controllingButton;
  62
  63 void ModalController_initializeDialog(entity me, entity root)
  64 {
  65         me.hideAll(me, 1);
  66         me.showChild(me, root, '0 0 0', '0 0 0', 1); // someone else animates for us
  67 }
  68
  69 void TabButton_Click(entity button, entity tab)
  70 {
  71         if(tab.ModalController_state == 1)
  72                 return;
  73         tab.parent.hideAll(tab.parent, 0);
  74         button.forcePressed = 1;
  75         tab.ModalController_controllingButton = button;
  76         tab.parent.showChild(tab.parent, tab, button.origin, button.size, 0);
  77 }
  78
  79 void DialogOpenButton_Click(entity button, entity tab)
  80 {
  81         DialogOpenButton_Click_withCoords(button, tab, button.origin, button.size);
  82 }
  83
  84 void DialogOpenButton_Click_withCoords(entity button, entity tab, vector theOrigin, vector theSize)
  85 {
  86         if(tab.ModalController_state)
  87                 return;
  88         if(button)
  89                 button.forcePressed = 1;
  90         tab.ModalController_controllingButton = button;
  91         tab.parent.showChild(tab.parent, tab, theOrigin, theSize, 0);
  92 }
  93
  94 void DialogCloseButton_Click(entity button, entity tab)
  95 {
  96         tab.parent.hideChild(tab.parent, tab, 0);
  97 }
  98
  99 void ModalController_resizeNotify(entity me, vector relOrigin, vector relSize, vector absOrigin, vector absSize)
 100 {
 101         me.resizeNotifyLie(me, relOrigin, relSize, absOrigin, absSize, ModalController_initialOrigin, ModalController_initialSize, ModalController_initialFontScale);
 102 }
 103
 104 void ModalController_switchState(entity me, entity other, float state, float skipAnimation)
 105 {
 106         float previousState;
 107         previousState = other.ModalController_state;
 108         if(state == previousState && !skipAnimation)
 109                 return;
 110         other.ModalController_state = state;
 111         switch(state)
 112         {
 113                 case 0:
 114                         other.ModalController_factor = 1 - other.Container_alpha / other.ModalController_initialAlpha;
 115                         // fading out
 116                         break;
 117                 case 1:
 118                         other.ModalController_factor = other.Container_alpha / other.ModalController_initialAlpha;
 119                         if(previousState == 0 && !skipAnimation)
 120                         {
 121                                 other.Container_origin = other.ModalController_buttonOrigin;
 122                                 other.Container_size = other.ModalController_buttonSize;
 123                         }
 124                         // zooming in
 125                         break;
 126                 case 2:
 127                         other.ModalController_factor = bound(0, (1 - other.Container_alpha / other.ModalController_initialAlpha) / me.fadedAlpha, 1);
 128                         // fading out halfway
 129                         break;
 130         }
 131         if(skipAnimation)
 132                 other.ModalController_factor = 1;
 133 }
 134
 135 void ModalController_draw(entity me)
 136 {
 137         entity e;
 138         entity front;
 139         float animating;
 140         float f; // animation factor
 141         float df; // animation step size
 142         float prevFactor, targetFactor;
 143         vector targetOrigin, targetSize; float targetAlpha;
 144         vector fs;
 145         animating = 0;
 146
 147         front = world;
 148         for(e = me.firstChild; e; e = e.nextSibling)
 149                 if(e.ModalController_state)
 150                 {
 151                         if(front)
 152                                 me.switchState(me, front, 2, 0);
 153                         front = e;
 154                 }
 155         if(front)
 156                 me.switchState(me, front, 1, 0);
 157
 158         df = frametime * 3; // animation speed
 159
 160         for(e = me.firstChild; e; e = e.nextSibling)
 161         {
 162                 f = (e.ModalController_factor = min(1, e.ModalController_factor + df));
 163                 if(e.ModalController_state)
 164                         if(f < 1)
 165                                 animating = 1;
 166
 167                 if(f < 1)
 168                 {
 169                         prevFactor   = (1 - f) / (1 - f + df);
 170                         targetFactor =     df  / (1 - f + df);
 171                 }
 172                 else
 173                 {
 174                         prevFactor = 0;
 175                         targetFactor = 1;
 176                 }
 177
 178                 if(e.ModalController_state == 2)
 179                 {
 180                         // fading out partially
 181                         targetOrigin = e.Container_origin; // stay as is
 182                         targetSize = e.Container_size; // stay as is
 183                         targetAlpha = me.fadedAlpha * e.ModalController_initialAlpha;
 184                 }
 185                 else if(e.ModalController_state == 1)
 186                 {
 187                         // zooming in
 188                         targetOrigin = e.ModalController_initialOrigin;
 189                         targetSize = e.ModalController_initialSize;
 190                         targetAlpha = e.ModalController_initialAlpha;
 191                 }
 192                 else
 193                 {
 194                         // fading out
 195                         if(f < 1)
 196                                 animating = 1;
 197                         targetOrigin = e.Container_origin; // stay as is
 198                         targetSize = e.Container_size; // stay as is
 199                         targetAlpha = 0;
 200                 }
 201
 202                 if(f == 1)
 203                 {
 204                         e.Container_origin = targetOrigin;
 205                         e.Container_size = targetSize;
 206                         me.setAlphaOf(me, e, targetAlpha);
 207                 }
 208                 else
 209                 {
 210                         e.Container_origin = e.Container_origin * prevFactor + targetOrigin * targetFactor;
 211                         e.Container_size   = e.Container_size   * prevFactor + targetSize   * targetFactor;
 212                         me.setAlphaOf(me, e, e.Container_alpha  * prevFactor + targetAlpha  * targetFactor);
 213                 }
 214                 // assume: o == to * f_prev + X * (1 - f_prev)
 215                 // make:   o' = to * f  + X * (1 - f)
 216                 // -->
 217                 // X == (o - to * f_prev) / (1 - f_prev)
 218                 // o' = to * f + (o - to * f_prev) / (1 - f_prev) * (1 - f)
 219                 // --> (maxima)
 220                 // o' = (to * (f - f_prev) + o * (1 - f)) / (1 - f_prev)
 221
 222                 fs = globalToBoxSize(e.Container_size, e.ModalController_initialSize);
 223                 e.Container_fontscale_x = fs_x * e.ModalController_initialFontScale_x;
 224                 e.Container_fontscale_y = fs_y * e.ModalController_initialFontScale_y;
 225         }
 226         if(animating || !me.focused)
 227                 me.setFocus(me, NULL);
 228         else
 229                 me.setFocus(me, front);
 230         SUPER(ModalController).draw(me);
 231 }
 232
 233 void ModalController_addTab(entity me, entity other, entity tabButton)
 234 {
 235         me.addItem(me, other, '0 0 0', '1 1 1', 1);
 236         tabButton.onClick = TabButton_Click;
 237         tabButton.onClickEntity = other;
 238         other.tabSelectingButton = tabButton;
 239         if(other == me.firstChild)
 240         {
 241                 tabButton.forcePressed = 1;
 242                 other.ModalController_controllingButton = tabButton;
 243                 me.showChild(me, other, '0 0 0', '0 0 0', 1);
 244         }
 245 }
 246
 247 void ModalController_addItem(entity me, entity other, vector theOrigin, vector theSize, float theAlpha)
 248 {
 249         SUPER(ModalController).addItem(me, other, theOrigin, theSize, (other == me.firstChild) ? theAlpha : 0);
 250         other.ModalController_initialFontScale = other.Container_fontscale;
 251         other.ModalController_initialSize = other.Container_size;
 252         other.ModalController_initialOrigin = other.Container_origin;
 253         other.ModalController_initialAlpha = theAlpha; // hope Container never modifies this
 254         if(other.ModalController_initialFontScale == '0 0 0')
 255                 other.ModalController_initialFontScale = '1 1 0';
 256 }
 257
 258 void ModalController_showChild(entity me, entity other, vector theOrigin, vector theSize, float skipAnimation)
 259 {
 260         if(other.ModalController_state == 0 || skipAnimation)
 261         {
 262                 me.setFocus(me, NULL);
 263                 if(!skipAnimation)
 264                 {
 265                         other.ModalController_buttonOrigin = globalToBox(theOrigin, me.origin, me.size);
 266                         other.ModalController_buttonSize = globalToBoxSize(theSize, me.size);
 267                 }
 268                 me.switchState(me, other, 1, skipAnimation);
 269         } // zoom in from button (factor increases)
 270 }
 271
 272 void ModalController_hideAll(entity me, float skipAnimation)
 273 {
 274         entity e;
 275         for(e = me.firstChild; e; e = e.nextSibling)
 276                 me.hideChild(me, e, skipAnimation);
 277 }
 278
 279 void ModalController_hideChild(entity me, entity other, float skipAnimation)
 280 {
 281         if(other.ModalController_state || skipAnimation)
 282         {
 283                 me.setFocus(me, NULL);
 284                 me.switchState(me, other, 0, skipAnimation);
 285                 if(other.ModalController_controllingButton)
 286                 {
 287                         other.ModalController_controllingButton.forcePressed = 0;
 288                         other.ModalController_controllingButton = NULL;
 289                 }
 290         } // just alpha fade out (factor increases and decreases alpha)
 291 }
 292 #endif