add a little visual to channel names

src/engine/engine.cpp

@@ -4911,6 +4911,9 @@ void DivEngine::play() {
   } else {
     stepPlay=0;
   }
+  for (int i=0; i<DIV_MAX_CHANS; i++) {
+    keyHit[i]=false;
+  }
   isBusy.unlock();
 }
 
@@ -4921,6 +4924,9 @@ void DivEngine::playToRow(int row) {
   sPreview.pos=0;
   freelance=false;
   playSub(false,row);
+  for (int i=0; i<DIV_MAX_CHANS; i++) {
+    keyHit[i]=false;
+  }
   isBusy.unlock();
 }
 
@@ -4929,6 +4935,9 @@ void DivEngine::stepOne(int row) {
   if (!isPlaying()) {
     freelance=false;
     playSub(false,row);
+    for (int i=0; i<DIV_MAX_CHANS; i++) {
+      keyHit[i]=false;
+    }
   }
   stepPlay=2;
   ticks=1;
@@ -6322,6 +6331,7 @@ bool DivEngine::init() {
 
   for (int i=0; i<DIV_MAX_CHANS; i++) {
     isMuted[i]=0;
+    keyHit[i]=false;
   }
 
   oscBuf[0]=new float[32768];

src/engine/engine.h

@@ -223,6 +223,7 @@ class DivEngine {
     DivSystem sysOfChan[DIV_MAX_CHANS];
     int dispatchOfChan[DIV_MAX_CHANS];
     int dispatchChanOfChan[DIV_MAX_CHANS];
+    bool keyHit[DIV_MAX_CHANS];
     float* oscBuf[2];
     float oscSize;
 

src/engine/playback.cpp

@@ -731,6 +731,7 @@ void DivEngine::processRow(int i, bool afterDelay) {
         chan[i].portaNote=chan[i].note;
       } else if (!chan[i].noteOnInhibit) {
         dispatchCmd(DivCommand(DIV_CMD_NOTE_ON,i,chan[i].note,chan[i].volume>>8));
+        keyHit[i]=true;
       }
     }
     chan[i].doNote=false;
@@ -871,6 +872,7 @@ bool DivEngine::nextTick(bool noAccum) {
     if (note.on) {
       dispatchCmd(DivCommand(DIV_CMD_INSTRUMENT,note.channel,note.ins,1));
       dispatchCmd(DivCommand(DIV_CMD_NOTE_ON,note.channel,note.note));
+      keyHit[note.channel]=true;
       chan[note.channel].noteOnInhibit=true;
     } else {
       dispatchCmd(DivCommand(DIV_CMD_NOTE_OFF,note.channel));
@@ -901,6 +903,7 @@ bool DivEngine::nextTick(bool noAccum) {
         if (--chan[i].retrigTick<0) {
           chan[i].retrigTick=chan[i].retrigSpeed-1;
           dispatchCmd(DivCommand(DIV_CMD_NOTE_ON,i,DIV_NOTE_NULL));
+          keyHit[i]=true;
         }
       }
       if (chan[i].volSpeed!=0) {

src/gui/gui.cpp

@@ -3061,9 +3061,15 @@ void FurnaceGUI::drawPattern() {
         ImVec4 chanHead=muted?uiColors[GUI_COLOR_CHANNEL_MUTED]:uiColors[GUI_COLOR_CHANNEL_FM+e->getChannelType(i)];
         ImVec4 chanHeadActive=chanHead;
         ImVec4 chanHeadHover=chanHead;
-        chanHead.x*=0.25; chanHead.y*=0.25; chanHead.z*=0.25;
+        if (e->keyHit[i]) {
+          keyHit[i]=0.2;
+          e->keyHit[i]=false;
+        }
+        chanHead.x*=0.25+keyHit[i]; chanHead.y*=0.25+keyHit[i]; chanHead.z*=0.25+keyHit[i];
         chanHeadActive.x*=0.8; chanHeadActive.y*=0.8; chanHeadActive.z*=0.8;
-        chanHeadHover.x*=0.4; chanHeadHover.y*=0.4; chanHeadHover.z*=0.4;
+        chanHeadHover.x*=0.4+keyHit[i]; chanHeadHover.y*=0.4+keyHit[i]; chanHeadHover.z*=0.4+keyHit[i];
+        keyHit[i]-=0.02;
+        if (keyHit[i]<0) keyHit[i]=0;
         ImGui::PushStyleColor(ImGuiCol_Header,chanHead);
         ImGui::PushStyleColor(ImGuiCol_HeaderActive,chanHeadActive);
         ImGui::PushStyleColor(ImGuiCol_HeaderHovered,chanHeadHover);

src/gui/gui.h

@@ -342,6 +342,8 @@ class FurnaceGUI {
   std::deque<UndoStep> undoHist;
   std::deque<UndoStep> redoHist;
 
+  float keyHit[DIV_MAX_CHANS];
+
   void drawAlgorithm(unsigned char alg, FurnaceGUIFMAlgs algType, const ImVec2& size);
   void drawFMEnv(unsigned char ar, unsigned char dr, unsigned char d2r, unsigned char rr, unsigned char sl, const ImVec2& size);