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         if(tab.parent.focusedChild)
  91                 tab.parent.focusedChild.saveFocus(tab.parent.focusedChild);
  92         tab.ModalController_controllingButton = button;
  93         tab.parent.showChild(tab.parent, tab, theOrigin, theSize, 0);
  94 }
  95
  96 void DialogCloseButton_Click(entity button, entity tab)
  97 {
  98         tab.parent.hideChild(tab.parent, tab, 0);
  99 }
 100
 101 void ModalController_resizeNotify(entity me, vector relOrigin, vector relSize, vector absOrigin, vector absSize)
 102 {
 103         me.resizeNotifyLie(me, relOrigin, relSize, absOrigin, absSize, ModalController_initialOrigin, ModalController_initialSize, ModalController_initialFontScale);
 104 }
 105
 106 void ModalController_switchState(entity me, entity other, float state, float skipAnimation)
 107 {
 108         float previousState;
 109         previousState = other.ModalController_state;
 110         if(state == previousState && !skipAnimation)
 111                 return;
 112         other.ModalController_state = state;
 113         switch(state)
 114         {
 115                 case 0:
 116                         other.ModalController_factor = 1 - other.Container_alpha / other.ModalController_initialAlpha;
 117                         // fading out
 118                         break;
 119                 case 1:
 120                         other.ModalController_factor = other.Container_alpha / other.ModalController_initialAlpha;
 121                         if(previousState == 0 && !skipAnimation)
 122                         {
 123                                 other.Container_origin = other.ModalController_buttonOrigin;
 124                                 other.Container_size = other.ModalController_buttonSize;
 125                         }
 126                         // zooming in
 127                         break;
 128                 case 2:
 129                         other.ModalController_factor = bound(0, (1 - other.Container_alpha / other.ModalController_initialAlpha) / me.fadedAlpha, 1);
 130                         // fading out halfway
 131                         break;
 132         }
 133         if(skipAnimation)
 134                 other.ModalController_factor = 1;
 135 }
 136
 137 void ModalController_draw(entity me)
 138 {
 139         entity e;
 140         entity front;
 141         float animating;
 142         float f; // animation factor
 143         float df; // animation step size
 144         float prevFactor, targetFactor;
 145         vector targetOrigin, targetSize; float targetAlpha;
 146         vector fs;
 147         animating = 0;
 148
 149         front = world;
 150         for(e = me.firstChild; e; e = e.nextSibling)
 151                 if(e.ModalController_state)
 152                 {
 153                         if(front)
 154                                 me.switchState(me, front, 2, 0);
 155                         front = e;
 156                 }
 157         if(front)
 158                 me.switchState(me, front, 1, 0);
 159
 160         df = frametime * 3; // animation speed
 161
 162         for(e = me.firstChild; e; e = e.nextSibling)
 163         {
 164                 f = (e.ModalController_factor = min(1, e.ModalController_factor + df));
 165                 if(e.ModalController_state)
 166                         if(f < 1)
 167                                 animating = 1;
 168
 169                 if(f < 1)
 170                 {
 171                         prevFactor   = (1 - f) / (1 - f + df);
 172                         targetFactor =     df  / (1 - f + df);
 173                 }
 174                 else
 175                 {
 176                         prevFactor = 0;
 177                         targetFactor = 1;
 178                 }
 179
 180                 if(e.ModalController_state == 2)
 181                 {
 182                         // fading out partially
 183                         targetOrigin = e.Container_origin; // stay as is
 184                         targetSize = e.Container_size; // stay as is
 185                         targetAlpha = me.fadedAlpha * e.ModalController_initialAlpha;
 186                 }
 187                 else if(e.ModalController_state == 1)
 188                 {
 189                         // zooming in
 190                         targetOrigin = e.ModalController_initialOrigin;
 191                         targetSize = e.ModalController_initialSize;
 192                         targetAlpha = e.ModalController_initialAlpha;
 193                 }
 194                 else
 195                 {
 196                         // fading out
 197                         if(f < 1)
 198                                 animating = 1;
 199                         targetOrigin = e.Container_origin; // stay as is
 200                         targetSize = e.Container_size; // stay as is
 201                         targetAlpha = 0;
 202                 }
 203
 204                 if(f == 1)
 205                 {
 206                         e.Container_origin = targetOrigin;
 207                         e.Container_size = targetSize;
 208                         me.setAlphaOf(me, e, targetAlpha);
 209                 }
 210                 else
 211                 {
 212                         e.Container_origin = e.Container_origin * prevFactor + targetOrigin * targetFactor;
 213                         e.Container_size   = e.Container_size   * prevFactor + targetSize   * targetFactor;
 214                         me.setAlphaOf(me, e, e.Container_alpha  * prevFactor + targetAlpha  * targetFactor);
 215                 }
 216                 // assume: o == to * f_prev + X * (1 - f_prev)
 217                 // make:   o' = to * f  + X * (1 - f)
 218                 // -->
 219                 // X == (o - to * f_prev) / (1 - f_prev)
 220                 // o' = to * f + (o - to * f_prev) / (1 - f_prev) * (1 - f)
 221                 // --> (maxima)
 222                 // o' = (to * (f - f_prev) + o * (1 - f)) / (1 - f_prev)
 223
 224                 fs = globalToBoxSize(e.Container_size, e.ModalController_initialSize);
 225                 e.Container_fontscale_x = fs_x * e.ModalController_initialFontScale_x;
 226                 e.Container_fontscale_y = fs_y * e.ModalController_initialFontScale_y;
 227         }
 228         if(animating || !me.focused)
 229                 me.setFocus(me, NULL);
 230         else
 231                 me.setFocus(me, front);
 232         SUPER(ModalController).draw(me);
 233 }
 234
 235 void ModalController_addTab(entity me, entity other, entity tabButton)
 236 {
 237         me.addItem(me, other, '0 0 0', '1 1 1', 1);
 238         tabButton.onClick = TabButton_Click;
 239         tabButton.onClickEntity = other;
 240         other.tabSelectingButton = tabButton;
 241         if(other == me.firstChild)
 242         {
 243                 tabButton.forcePressed = 1;
 244                 other.ModalController_controllingButton = tabButton;
 245                 me.showChild(me, other, '0 0 0', '0 0 0', 1);
 246         }
 247 }
 248
 249 void ModalController_addItem(entity me, entity other, vector theOrigin, vector theSize, float theAlpha)
 250 {
 251         SUPER(ModalController).addItem(me, other, theOrigin, theSize, (other == me.firstChild) ? theAlpha : 0);
 252         other.ModalController_initialFontScale = other.Container_fontscale;
 253         other.ModalController_initialSize = other.Container_size;
 254         other.ModalController_initialOrigin = other.Container_origin;
 255         other.ModalController_initialAlpha = theAlpha; // hope Container never modifies this
 256         if(other.ModalController_initialFontScale == '0 0 0')
 257                 other.ModalController_initialFontScale = '1 1 0';
 258 }
 259
 260 void ModalController_showChild(entity me, entity other, vector theOrigin, vector theSize, float skipAnimation)
 261 {
 262         if(other.ModalController_state == 0 || skipAnimation)
 263         {
 264                 me.setFocus(me, NULL);
 265                 if(!skipAnimation)
 266                 {
 267                         other.ModalController_buttonOrigin = globalToBox(theOrigin, me.origin, me.size);
 268                         other.ModalController_buttonSize = globalToBoxSize(theSize, me.size);
 269                 }
 270                 me.switchState(me, other, 1, skipAnimation);
 271         } // zoom in from button (factor increases)
 272 }
 273
 274 void ModalController_hideAll(entity me, float skipAnimation)
 275 {
 276         entity e;
 277         for(e = me.firstChild; e; e = e.nextSibling)
 278                 me.hideChild(me, e, skipAnimation);
 279 }
 280
 281 void ModalController_hideChild(entity me, entity other, float skipAnimation)
 282 {
 283         if(other.ModalController_state || skipAnimation)
 284         {
 285                 me.setFocus(me, NULL);
 286                 me.switchState(me, other, 0, skipAnimation);
 287                 if(other.ModalController_controllingButton)
 288                 {
 289                         other.ModalController_controllingButton.forcePressed = 0;
 290                         other.ModalController_controllingButton = NULL;
 291                 }
 292         } // just alpha fade out (factor increases and decreases alpha)
 293 }
 294 #endif