zynaddsubfx

ZynAddSubFX open source synthesizer
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VuPartMeter.h (1839B)

      1 /*
      2   ZynAddSubFX - a software synthesizer
      3 
      4   VuPartMeter.h - OSC Controlled VU Meter
      5   Copyright (C) 2016 Mark McCurry
      6 
      7   This program is free software; you can redistribute it and/or
      8   modify it under the terms of the GNU General Public License
      9   as published by the Free Software Foundation; either version 2
     10   of the License, or (at your option) any later version.
     11 */
     12 #include "VuMeter.h"
     13 #define MIN_DB (-48)
     14 
     15 class VuPartMeter: public VuMeter
     16 {
     17     public:
     18         VuPartMeter(int x,int y, int w, int h, const char *label=0)
     19             :VuMeter(x,y,w,h,label), db(0.0f)
     20         {}
     21 
     22         void draw(void)
     23         {
     24             const int X = x(), Y = y(), W = w(), H = h();
     25 
     26             //XXX perhaps re-enable this later on
     27             //if (!active_r()){
     28             //    int fakedb=master->fakepeakpart[npart];
     29             //    fl_rectf(X,Y,W,H,140,140,140);
     30             //    if (fakedb>0){
     31             //        fakedb=(int)(fakedb/255.0*H)+4;
     32             //        fl_rectf(X+2,Y+H-fakedb,W-4,fakedb,0,0,0);
     33             //    }
     34             //    return;
     35             //}
     36 
     37             //draw the vu lines
     38             const int idb = db*(H-2);
     39 
     40             fl_rectf(X,Y+H-idb,W,idb,0,200,255);
     41             fl_rectf(X,Y,W,H-idb,0,0,0);
     42 
     43             //draw the scales
     44             const float tmp=H*1.0/MIN_DB;
     45             for (int i = 1; i < 1 - MIN_DB; i++) {
     46                 const int ty = H+(int) (tmp*i);
     47                 if(i%5  == 0) fl_rectf(X, Y+H-ty, W, 1,0, 160, 200);
     48                 if(i%10 == 0) fl_rectf(X, Y+H-ty, W, 1,0, 230, 240);
     49             }
     50         }
     51 
     52         void update(float x)
     53         {
     54             const float _db = limit((MIN_DB-rap2dB(x))/MIN_DB);
     55 
     56             if(db != _db) {
     57                 db = _db;
     58                 damage(FL_DAMAGE_USER1);
     59             }
     60         }
     61 
     62     private:
     63         float db;
     64 };