interpretor/faust-0.9.47mr3/architecture/gui/GUI.h

   1 #ifndef FAUST_GUI_H
   2 #define FAUST_GUI_H
   3
   4 #include "UI.h"
   5 #include <list>
   6 #include <map>
   7
   8 using namespace std;
   9
  10
  11 /*******************************************************************************
  12  * GUI : Abstract Graphic User Interface
  13  * Provides additional macchanismes to synchronize widgets and zones. Widgets
  14  * should both reflect the value of a zone and allow to change this value.
  15  ******************************************************************************/
  16
  17 struct uiItem;
  18 typedef void (*uiCallback)(float val, void* data);
  19
  20 class GUI : public UI
  21 {
  22         typedef list<uiItem*> clist;
  23         typedef map<float*, clist*> zmap;
  24
  25  private:
  26         static list<GUI*>       fGuiList;
  27         zmap                            fZoneMap;
  28         bool                            fStopped;
  29
  30  public:
  31
  32         GUI() : fStopped(false) {
  33                 fGuiList.push_back(this);
  34         }
  35
  36         virtual ~GUI() {
  37                 // suppression de this dans fGuiList
  38         }
  39
  40         // -- registerZone(z,c) : zone management
  41
  42         void registerZone(float* z, uiItem* c)
  43         {
  44                 if (fZoneMap.find(z) == fZoneMap.end()) fZoneMap[z] = new clist();
  45                 fZoneMap[z]->push_back(c);
  46         }
  47
  48         void updateAllZones();
  49
  50         void updateZone(float* z);
  51
  52         static void updateAllGuis()
  53         {
  54                 list<GUI*>::iterator g;
  55                 for (g = fGuiList.begin(); g != fGuiList.end(); g++) {
  56                         (*g)->updateAllZones();
  57                 }
  58         }
  59     void addCallback(float* zone, uiCallback foo, void* data);
  60     virtual void show() {};
  61     virtual void run() {};
  62
  63         void stop()             { fStopped = true; }
  64         bool stopped()  { return fStopped; }
  65
  66     virtual void declare(float* , const char* , const char* ) {}
  67 };
  68
  69
  70
  71 /**
  72  * User Interface Item: abstract definition
  73  */
  74
  75 class uiItem
  76 {
  77   protected :
  78
  79         GUI*            fGUI;
  80         float*          fZone;
  81         float           fCache;
  82
  83         uiItem (GUI* ui, float* zone) : fGUI(ui), fZone(zone), fCache(-123456.654321)
  84         {
  85                 ui->registerZone(zone, this);
  86         }
  87
  88
  89   public :
  90         virtual ~uiItem() {}
  91
  92         void modifyZone(float v)
  93         {
  94                 fCache = v;
  95                 if (*fZone != v) {
  96                         *fZone = v;
  97                         fGUI->updateZone(fZone);
  98                 }
  99         }
 100
 101         float                   cache()                 { return fCache; }
 102         virtual void    reflectZone()   = 0;
 103 };
 104
 105
 106 /**
 107  * Callback Item
 108  */
 109
 110 struct uiCallbackItem : public uiItem
 111 {
 112         uiCallback      fCallback;
 113         void*           fData;
 114
 115         uiCallbackItem(GUI* ui, float* zone, uiCallback foo, void* data)
 116                         : uiItem(ui, zone), fCallback(foo), fData(data) {}
 117
 118         virtual void    reflectZone() {
 119                 float   v = *fZone;
 120                 fCache = v;
 121                 fCallback(v, fData);
 122         }
 123 };
 124
 125 // en cours d'installation de call back. a finir!!!!!
 126
 127 /**
 128  * Update all user items reflecting zone z
 129  */
 130
 131 inline void GUI::updateZone(float* z)
 132 {
 133         float   v = *z;
 134         clist*  l = fZoneMap[z];
 135         for (clist::iterator c = l->begin(); c != l->end(); c++) {
 136                 if ((*c)->cache() != v) (*c)->reflectZone();
 137         }
 138 }
 139
 140
 141 /**
 142  * Update all user items not up to date
 143  */
 144
 145 inline void GUI::updateAllZones()
 146 {
 147         for (zmap::iterator m = fZoneMap.begin(); m != fZoneMap.end(); m++) {
 148                 float*  z = m->first;
 149                 clist*  l = m->second;
 150                 float   v = *z;
 151                 for (clist::iterator c = l->begin(); c != l->end(); c++) {
 152                         if ((*c)->cache() != v) (*c)->reflectZone();
 153                 }
 154         }
 155 }
 156
 157 inline void GUI::addCallback(float* zone, uiCallback foo, void* data)
 158 {
 159         new uiCallbackItem(this, zone, foo, data);
 160 };
 161
 162 #endif