From b3d26d33094df3ec16651998c83632f36b15d700 Mon Sep 17 00:00:00 2001
From: tildearrow <tildearrow@protonmail.com>
Date: Thu, 17 Feb 2022 14:04:39 -0500
Subject: [PATCH] GUI: code split, part 2

---
 CMakeLists.txt      |   5 +-
 src/gui/gui.cpp     | 707 ------------------------------------------
 src/gui/pattern.cpp | 733 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 737 insertions(+), 708 deletions(-)
 create mode 100644 src/gui/pattern.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c9ed6046..401eb099 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -321,9 +321,12 @@ src/gui/font_unifont.cpp
 src/gui/font_icon.cpp
 src/gui/fonts.cpp
 src/gui/debug.cpp
-src/gui/insEdit.cpp
+
 src/gui/intConst.cpp
 src/gui/guiConst.cpp
+
+src/gui/insEdit.cpp
+src/gui/pattern.cpp
 src/gui/gui.cpp
 )
 
diff --git a/src/gui/gui.cpp b/src/gui/gui.cpp
index 31a0d17c..2f2c59ac 100644
--- a/src/gui/gui.cpp
+++ b/src/gui/gui.cpp
@@ -72,50 +72,8 @@ extern "C" {
 #endif
 #endif
 
-const FurnaceGUIColors fxColors[16]={
-  GUI_COLOR_PATTERN_EFFECT_MISC, // 00
-  GUI_COLOR_PATTERN_EFFECT_PITCH, // 01
-  GUI_COLOR_PATTERN_EFFECT_PITCH, // 02
-  GUI_COLOR_PATTERN_EFFECT_PITCH, // 03
-  GUI_COLOR_PATTERN_EFFECT_PITCH, // 04
-  GUI_COLOR_PATTERN_EFFECT_VOLUME, // 05
-  GUI_COLOR_PATTERN_EFFECT_VOLUME, // 06
-  GUI_COLOR_PATTERN_EFFECT_VOLUME, // 07
-  GUI_COLOR_PATTERN_EFFECT_PANNING, // 08
-  GUI_COLOR_PATTERN_EFFECT_SPEED, // 09
-  GUI_COLOR_PATTERN_EFFECT_VOLUME, // 0A
-  GUI_COLOR_PATTERN_EFFECT_SONG, // 0B
-  GUI_COLOR_PATTERN_EFFECT_TIME, // 0C
-  GUI_COLOR_PATTERN_EFFECT_SONG, // 0D
-  GUI_COLOR_PATTERN_EFFECT_INVALID, // 0E
-  GUI_COLOR_PATTERN_EFFECT_SPEED, // 0F
-};
-
-const FurnaceGUIColors extFxColors[16]={
-  GUI_COLOR_PATTERN_EFFECT_MISC, // E0
-  GUI_COLOR_PATTERN_EFFECT_PITCH, // E1
-  GUI_COLOR_PATTERN_EFFECT_PITCH, // E2
-  GUI_COLOR_PATTERN_EFFECT_MISC, // E3
-  GUI_COLOR_PATTERN_EFFECT_MISC, // E4
-  GUI_COLOR_PATTERN_EFFECT_PITCH, // E5
-  GUI_COLOR_PATTERN_EFFECT_INVALID, // E6
-  GUI_COLOR_PATTERN_EFFECT_INVALID, // E7
-  GUI_COLOR_PATTERN_EFFECT_INVALID, // E8
-  GUI_COLOR_PATTERN_EFFECT_INVALID, // E9
-  GUI_COLOR_PATTERN_EFFECT_MISC, // EA
-  GUI_COLOR_PATTERN_EFFECT_MISC, // EB
-  GUI_COLOR_PATTERN_EFFECT_TIME, // EC
-  GUI_COLOR_PATTERN_EFFECT_TIME, // ED
-  GUI_COLOR_PATTERN_EFFECT_SONG, // EE
-  GUI_COLOR_PATTERN_EFFECT_SONG, // EF
-};
-
 String getHomeDir();
 
-inline float randRange(float min, float max) {
-  return min+((float)rand()/(float)RAND_MAX)*(max-min);
-}
-
 bool Particle::update() {
   pos.x+=speed.x;
   pos.y+=speed.y;
@@ -1679,671 +1637,6 @@ void FurnaceGUI::drawVolMeter() {
   ImGui::End();
 }
 
-// draw a pattern row
-inline void FurnaceGUI::patternRow(int i, bool isPlaying, float lineHeight, int chans, int ord) {
-  static char id[32];
-  bool selectedRow=(i>=sel1.y && i<=sel2.y);
-  ImGui::TableNextRow(0,lineHeight);
-  ImGui::TableNextColumn();
-  float cursorPosY=ImGui::GetCursorPos().y-ImGui::GetScrollY();
-  // check if the row is visible
-  if (cursorPosY<-lineHeight || cursorPosY>ImGui::GetWindowSize().y) {
-    return;
-  }
-  // check if we are in range
-  if (ord<0 || ord>=e->song.ordersLen) {
-    return;
-  }
-  if (i<0 || i>=e->song.patLen) {
-    return;
-  }
-  // check overflow highlight
-  if (settings.overflowHighlight) {
-    if (edit && cursor.y==i) {
-      ImGui::TableSetBgColor(ImGuiTableBgTarget_RowBg0,ImGui::GetColorU32(uiColors[GUI_COLOR_EDITING]));
-    } else if (isPlaying && oldRow==i) {
-      ImGui::TableSetBgColor(ImGuiTableBgTarget_RowBg0,0x40ffffff);
-    } else if (e->song.hilightB>0 && !(i%e->song.hilightB)) {
-      ImGui::TableSetBgColor(ImGuiTableBgTarget_RowBg0,ImGui::GetColorU32(uiColors[GUI_COLOR_PATTERN_HI_2]));
-    } else if (e->song.hilightA>0 && !(i%e->song.hilightA)) {
-      ImGui::TableSetBgColor(ImGuiTableBgTarget_RowBg0,ImGui::GetColorU32(uiColors[GUI_COLOR_PATTERN_HI_1]));
-    }
-  }
-  // row number
-  if (settings.patRowsBase==1) {
-    ImGui::TextColored(uiColors[GUI_COLOR_PATTERN_ROW_INDEX]," %.2X ",i);
-  } else {
-    ImGui::TextColored(uiColors[GUI_COLOR_PATTERN_ROW_INDEX],"%3d ",i);
-  }
-  // for each column
-  for (int j=0; j<chans; j++) {
-    // check if channel is not hidden
-    if (!e->song.chanShow[j]) {
-      patChanX[j]=ImGui::GetCursorPosX();
-      continue;
-    }
-    int chanVolMax=e->getMaxVolumeChan(j);
-    if (chanVolMax<1) chanVolMax=1;
-    DivPattern* pat=e->song.pat[j].getPattern(e->song.orders.ord[j][ord],true);
-    ImGui::TableNextColumn();
-    patChanX[j]=ImGui::GetCursorPosX();
-
-    // check overflow highlight
-    if (!settings.overflowHighlight) {
-      if (edit && cursor.y==i) {
-        ImGui::TableSetBgColor(ImGuiTableBgTarget_CellBg,ImGui::GetColorU32(uiColors[GUI_COLOR_EDITING]));
-      } else if (isPlaying && oldRow==i) {
-        ImGui::TableSetBgColor(ImGuiTableBgTarget_CellBg,0x40ffffff);
-      } else if (e->song.hilightB>0 && !(i%e->song.hilightB)) {
-        ImGui::TableSetBgColor(ImGuiTableBgTarget_CellBg,ImGui::GetColorU32(uiColors[GUI_COLOR_PATTERN_HI_2]));
-      } else if (e->song.hilightA>0 && !(i%e->song.hilightA)) {
-        ImGui::TableSetBgColor(ImGuiTableBgTarget_CellBg,ImGui::GetColorU32(uiColors[GUI_COLOR_PATTERN_HI_1]));
-      }
-    }
-
-    // selection highlight flags
-    int sel1XSum=sel1.xCoarse*32+sel1.xFine;
-    int sel2XSum=sel2.xCoarse*32+sel2.xFine;
-    int j32=j*32;
-    bool selectedNote=selectedRow && (j32>=sel1XSum && j32<=sel2XSum);
-    bool selectedIns=selectedRow && (j32+1>=sel1XSum && j32+1<=sel2XSum);
-    bool selectedVol=selectedRow && (j32+2>=sel1XSum && j32+2<=sel2XSum);
-    bool cursorNote=(cursor.y==i && cursor.xCoarse==j && cursor.xFine==0);
-    bool cursorIns=(cursor.y==i && cursor.xCoarse==j && cursor.xFine==1);
-    bool cursorVol=(cursor.y==i && cursor.xCoarse==j && cursor.xFine==2);
-
-    // note
-    sprintf(id,"%s##PN_%d_%d",noteName(pat->data[i][0],pat->data[i][1]),i,j);
-    if (pat->data[i][0]==0 && pat->data[i][1]==0) {
-      ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_INACTIVE]);
-    } else {
-      ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_ACTIVE]);
-    }
-    if (cursorNote) {
-      ImGui::PushStyleColor(ImGuiCol_Header,uiColors[GUI_COLOR_PATTERN_CURSOR]);
-      ImGui::PushStyleColor(ImGuiCol_HeaderActive,uiColors[GUI_COLOR_PATTERN_CURSOR_ACTIVE]);
-      ImGui::PushStyleColor(ImGuiCol_HeaderHovered,uiColors[GUI_COLOR_PATTERN_CURSOR_HOVER]);
-      ImGui::Selectable(id,true,ImGuiSelectableFlags_NoPadWithHalfSpacing,threeChars);
-      demandX=ImGui::GetCursorPosX();
-      ImGui::PopStyleColor(3);
-    } else {
-      ImGui::Selectable(id,selectedNote,ImGuiSelectableFlags_NoPadWithHalfSpacing,threeChars);
-    }
-    if (ImGui::IsItemClicked()) {
-      startSelection(j,0,i);
-    }
-    if (ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenBlockedByActiveItem)) {
-      updateSelection(j,0,i);
-    }
-    ImGui::PopStyleColor();
-
-    // the following is only visible when the channel is not collapsed
-    if (!e->song.chanCollapse[j]) {
-      // instrument
-      if (pat->data[i][2]==-1) {
-        ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_INACTIVE]);
-        sprintf(id,"..##PI_%d_%d",i,j);
-      } else {
-        ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_INS]);
-        sprintf(id,"%.2X##PI_%d_%d",pat->data[i][2],i,j);
-      }
-      ImGui::SameLine(0.0f,0.0f);
-      if (cursorIns) {
-        ImGui::PushStyleColor(ImGuiCol_Header,uiColors[GUI_COLOR_PATTERN_CURSOR]);
-        ImGui::PushStyleColor(ImGuiCol_HeaderActive,uiColors[GUI_COLOR_PATTERN_CURSOR_ACTIVE]);
-        ImGui::PushStyleColor(ImGuiCol_HeaderHovered,uiColors[GUI_COLOR_PATTERN_CURSOR_HOVER]);
-        ImGui::Selectable(id,true,ImGuiSelectableFlags_NoPadWithHalfSpacing,twoChars);
-        demandX=ImGui::GetCursorPosX();
-        ImGui::PopStyleColor(3);
-      } else {
-        ImGui::Selectable(id,selectedIns,ImGuiSelectableFlags_NoPadWithHalfSpacing,twoChars);
-      }
-      if (ImGui::IsItemClicked()) {
-        startSelection(j,1,i);
-      }
-      if (ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenBlockedByActiveItem)) {
-        updateSelection(j,1,i);
-      }
-      ImGui::PopStyleColor();
-
-      // volume
-      if (pat->data[i][3]==-1) {
-        sprintf(id,"..##PV_%d_%d",i,j);
-        ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_INACTIVE]);
-      } else {
-        int volColor=(pat->data[i][3]*127)/chanVolMax;
-        if (volColor>127) volColor=127;
-        if (volColor<0) volColor=0;
-        sprintf(id,"%.2X##PV_%d_%d",pat->data[i][3],i,j);
-        ImGui::PushStyleColor(ImGuiCol_Text,volColors[volColor]);
-      }
-      ImGui::SameLine(0.0f,0.0f);
-      if (cursorVol) {
-        ImGui::PushStyleColor(ImGuiCol_Header,uiColors[GUI_COLOR_PATTERN_CURSOR]);
-        ImGui::PushStyleColor(ImGuiCol_HeaderActive,uiColors[GUI_COLOR_PATTERN_CURSOR_ACTIVE]);
-        ImGui::PushStyleColor(ImGuiCol_HeaderHovered,uiColors[GUI_COLOR_PATTERN_CURSOR_HOVER]);
-        ImGui::Selectable(id,true,ImGuiSelectableFlags_NoPadWithHalfSpacing,twoChars);
-        demandX=ImGui::GetCursorPosX();
-        ImGui::PopStyleColor(3);
-      } else {
-        ImGui::Selectable(id,selectedVol,ImGuiSelectableFlags_NoPadWithHalfSpacing,twoChars);
-      }
-      if (ImGui::IsItemClicked()) {
-        startSelection(j,2,i);
-      }
-      if (ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenBlockedByActiveItem)) {
-        updateSelection(j,2,i);
-      }
-      ImGui::PopStyleColor();
-
-      // effects
-      for (int k=0; k<e->song.pat[j].effectRows; k++) {
-        int index=4+(k<<1);
-        bool selectedEffect=selectedRow && (j32+index-1>=sel1XSum && j32+index-1<=sel2XSum);
-        bool selectedEffectVal=selectedRow && (j32+index>=sel1XSum && j32+index<=sel2XSum);
-        bool cursorEffect=(cursor.y==i && cursor.xCoarse==j && cursor.xFine==index-1);
-        bool cursorEffectVal=(cursor.y==i && cursor.xCoarse==j && cursor.xFine==index);
-        
-        // effect
-        if (pat->data[i][index]==-1) {
-          sprintf(id,"..##PE%d_%d_%d",k,i,j);
-          ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_INACTIVE]);
-        } else {
-          sprintf(id,"%.2X##PE%d_%d_%d",pat->data[i][index],k,i,j);
-          if (pat->data[i][index]<0x10) {
-            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[fxColors[pat->data[i][index]]]);
-          } else if (pat->data[i][index]<0x20) {
-            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY]);
-          } else if (pat->data[i][index]<0x30) {
-            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_SYS_SECONDARY]);
-          } else if (pat->data[i][index]<0x48) {
-            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY]);
-          } else if (pat->data[i][index]<0xc0) {
-            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_INVALID]);
-          } else if (pat->data[i][index]<0xd0) {
-            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_SPEED]);
-          } else if (pat->data[i][index]<0xe0) {
-            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_INVALID]);
-          } else if (pat->data[i][index]<0xf0) {
-            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[extFxColors[pat->data[i][index]-0xe0]]);
-          } else {
-            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_INVALID]);
-          }
-        }
-        ImGui::SameLine(0.0f,0.0f);
-        if (cursorEffect) {
-          ImGui::PushStyleColor(ImGuiCol_Header,uiColors[GUI_COLOR_PATTERN_CURSOR]);  
-          ImGui::PushStyleColor(ImGuiCol_HeaderActive,uiColors[GUI_COLOR_PATTERN_CURSOR_ACTIVE]);
-          ImGui::PushStyleColor(ImGuiCol_HeaderHovered,uiColors[GUI_COLOR_PATTERN_CURSOR_HOVER]);
-          ImGui::Selectable(id,true,ImGuiSelectableFlags_NoPadWithHalfSpacing,twoChars);
-          demandX=ImGui::GetCursorPosX();
-          ImGui::PopStyleColor(3);
-        } else {
-          ImGui::Selectable(id,selectedEffect,ImGuiSelectableFlags_NoPadWithHalfSpacing,twoChars);
-        }
-        if (ImGui::IsItemClicked()) {
-          startSelection(j,index-1,i);
-        }
-        if (ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenBlockedByActiveItem)) {
-          updateSelection(j,index-1,i);
-        }
-
-        // effect value
-        if (pat->data[i][index+1]==-1) {
-          sprintf(id,"..##PF%d_%d_%d",k,i,j);
-        } else {
-          sprintf(id,"%.2X##PF%d_%d_%d",pat->data[i][index+1],k,i,j);
-        }
-        ImGui::SameLine(0.0f,0.0f);
-        if (cursorEffectVal) {
-          ImGui::PushStyleColor(ImGuiCol_Header,uiColors[GUI_COLOR_PATTERN_CURSOR]);  
-          ImGui::PushStyleColor(ImGuiCol_HeaderActive,uiColors[GUI_COLOR_PATTERN_CURSOR_ACTIVE]);
-          ImGui::PushStyleColor(ImGuiCol_HeaderHovered,uiColors[GUI_COLOR_PATTERN_CURSOR_HOVER]);
-          ImGui::Selectable(id,true,ImGuiSelectableFlags_NoPadWithHalfSpacing,twoChars);
-          demandX=ImGui::GetCursorPosX();
-          ImGui::PopStyleColor(3);
-        } else {
-          ImGui::Selectable(id,selectedEffectVal,ImGuiSelectableFlags_NoPadWithHalfSpacing,twoChars);
-        }
-        if (ImGui::IsItemClicked()) {
-          startSelection(j,index,i);
-        }
-        if (ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenBlockedByActiveItem)) {
-          updateSelection(j,index,i);
-        }
-        ImGui::PopStyleColor();
-      }
-    }
-  }
-  ImGui::TableNextColumn();
-  patChanX[chans]=ImGui::GetCursorPosX();
-}
-
-void FurnaceGUI::drawPattern() {
-  if (nextWindow==GUI_WINDOW_PATTERN) {
-    patternOpen=true;
-    ImGui::SetNextWindowFocus();
-    nextWindow=GUI_WINDOW_NOTHING;
-  }
-  if (!patternOpen) return;
-  if (e->isPlaying() && followPattern) cursor.y=oldRow;
-  demandX=0;
-  sel1=selStart;
-  sel2=selEnd;
-  if (sel2.y<sel1.y) {
-    sel2.y^=sel1.y;
-    sel1.y^=sel2.y;
-    sel2.y^=sel1.y;
-  }
-  if (sel2.xCoarse<sel1.xCoarse) {
-    sel2.xCoarse^=sel1.xCoarse;
-    sel1.xCoarse^=sel2.xCoarse;
-    sel2.xCoarse^=sel1.xCoarse;
-
-    sel2.xFine^=sel1.xFine;
-    sel1.xFine^=sel2.xFine;
-    sel2.xFine^=sel1.xFine;
-  } else if (sel2.xCoarse==sel1.xCoarse && sel2.xFine<sel1.xFine) {
-    sel2.xFine^=sel1.xFine;
-    sel1.xFine^=sel2.xFine;
-    sel2.xFine^=sel1.xFine;
-  }
-  ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding,ImVec2(0.0f,0.0f));
-  if (ImGui::Begin("Pattern",&patternOpen)) {
-    //ImGui::SetWindowSize(ImVec2(scrW*dpiScale,scrH*dpiScale));
-    patWindowPos=ImGui::GetWindowPos();
-    patWindowSize=ImGui::GetWindowSize();
-    //char id[32];
-    ImGui::PushFont(patFont);
-    int ord=e->isPlaying()?oldOrder:e->getOrder();
-    oldOrder=e->getOrder();
-    int chans=e->getTotalChannelCount();
-    int displayChans=0;
-    for (int i=0; i<chans; i++) {
-      if (e->song.chanShow[i]) displayChans++;
-    }
-    ImGui::PushStyleVar(ImGuiStyleVar_CellPadding,ImVec2(0.0f,0.0f));
-    ImGui::PushStyleColor(ImGuiCol_Header,uiColors[GUI_COLOR_PATTERN_SELECTION]);
-    ImGui::PushStyleColor(ImGuiCol_HeaderHovered,uiColors[GUI_COLOR_PATTERN_SELECTION_HOVER]);
-    ImGui::PushStyleColor(ImGuiCol_HeaderActive,uiColors[GUI_COLOR_PATTERN_SELECTION_ACTIVE]);
-    if (ImGui::BeginTable("PatternView",displayChans+2,ImGuiTableFlags_BordersInnerV|ImGuiTableFlags_ScrollX|ImGuiTableFlags_ScrollY|ImGuiTableFlags_NoPadInnerX)) {
-      ImGui::TableSetupColumn("pos",ImGuiTableColumnFlags_WidthFixed);
-      char chanID[2048];
-      float lineHeight=(ImGui::GetTextLineHeight()+2*dpiScale);
-      int curRow=e->getRow();
-      if (e->isPlaying() && followPattern) updateScroll(curRow);
-      if (nextScroll>-0.5f) {
-        ImGui::SetScrollY(nextScroll);
-        nextScroll=-1.0f;
-        nextAddScroll=0.0f;
-      }
-      if (nextAddScroll!=0.0f) {
-        ImGui::SetScrollY(ImGui::GetScrollY()+nextAddScroll);
-        nextScroll=-1.0f;
-        nextAddScroll=0.0f;
-      }
-      ImGui::TableSetupScrollFreeze(1,1);
-      for (int i=0; i<chans; i++) {
-        if (!e->song.chanShow[i]) continue;
-        ImGui::TableSetupColumn(fmt::sprintf("c%d",i).c_str(),ImGuiTableColumnFlags_WidthFixed);
-      }
-      ImGui::TableNextRow();
-      ImGui::TableNextColumn();
-      if (ImGui::Selectable(extraChannelButtons?" --##ExtraChannelButtons":" ++##ExtraChannelButtons",false,ImGuiSelectableFlags_NoPadWithHalfSpacing,ImVec2(0.0f,lineHeight+1.0f*dpiScale))) {
-        extraChannelButtons=!extraChannelButtons;
-      }
-      if (ImGui::IsItemClicked(ImGuiMouseButton_Right)) {
-        fancyPattern=!fancyPattern;
-        e->enableCommandStream(fancyPattern);
-        e->getCommandStream(cmdStream);
-        cmdStream.clear();
-      }
-      for (int i=0; i<chans; i++) {
-        if (!e->song.chanShow[i]) continue;
-        ImGui::TableNextColumn();
-        bool displayTooltip=false;
-        if (e->song.chanCollapse[i]) {
-          const char* chName=e->getChannelShortName(i);
-          if (strlen(chName)>3) {
-            snprintf(chanID,2048,"...##_CH%d",i);
-          } else {
-            snprintf(chanID,2048,"%s##_CH%d",chName,i);
-          }
-          displayTooltip=true;
-        } else {
-          const char* chName=e->getChannelName(i);
-          size_t chNameLimit=6+4*e->song.pat[i].effectRows;
-          if (strlen(chName)>chNameLimit) {
-            String shortChName=chName;
-            shortChName.resize(chNameLimit-3);
-            shortChName+="...";
-            snprintf(chanID,2048," %s##_CH%d",shortChName.c_str(),i);
-            displayTooltip=true;
-          } else {
-            snprintf(chanID,2048," %s##_CH%d",chName,i);
-          }
-        }
-        bool muted=e->isChannelMuted(i);
-        ImVec4 chanHead=muted?uiColors[GUI_COLOR_CHANNEL_MUTED]:uiColors[GUI_COLOR_CHANNEL_FM+e->getChannelType(i)];
-        ImVec4 chanHeadActive=chanHead;
-        ImVec4 chanHeadHover=chanHead;
-        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+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);
-        // help me why is the color leakingggggggg
-        ImGui::TableSetBgColor(ImGuiTableBgTarget_CellBg,ImGui::GetColorU32(chanHead));
-        if (muted) ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_CHANNEL_MUTED]);
-        ImGui::Selectable(chanID,true,ImGuiSelectableFlags_NoPadWithHalfSpacing,ImVec2(0.0f,lineHeight+1.0f*dpiScale));
-        if (displayTooltip && ImGui::IsItemHovered()) {
-          ImGui::SetTooltip("%s",e->getChannelName(i));
-        }
-        if (ImGui::IsItemClicked(ImGuiMouseButton_Left)) {
-          if (settings.soloAction!=1 && soloTimeout>0 && soloChan==i) {
-            e->toggleSolo(i);
-            soloTimeout=0;
-          } else {
-            e->toggleMute(i);
-            soloTimeout=20;
-            soloChan=i;
-          }
-        }
-        if (muted) ImGui::PopStyleColor();
-        ImGui::PopStyleColor(3);
-        if (settings.soloAction!=2) if (ImGui::IsItemClicked(ImGuiMouseButton_Right)) {
-          e->toggleSolo(i);
-        }
-        if (extraChannelButtons) {
-          snprintf(chanID,2048,"%c##_HCH%d",e->song.chanCollapse[i]?'+':'-',i);
-          ImGui::SetCursorPosX(ImGui::GetCursorPosX()+4.0f*dpiScale);
-          if (ImGui::SmallButton(chanID)) {
-            e->song.chanCollapse[i]=!e->song.chanCollapse[i];
-          }
-          if (!e->song.chanCollapse[i]) {
-            ImGui::SameLine();
-            snprintf(chanID,2048,"<##_LCH%d",i);
-            ImGui::BeginDisabled(e->song.pat[i].effectRows<=1);
-            if (ImGui::SmallButton(chanID)) {
-              e->song.pat[i].effectRows--;
-              if (e->song.pat[i].effectRows<1) e->song.pat[i].effectRows=1;
-            }
-            ImGui::EndDisabled();
-            ImGui::SameLine();
-            ImGui::BeginDisabled(e->song.pat[i].effectRows>=8);
-            snprintf(chanID,2048,">##_RCH%d",i);
-            if (ImGui::SmallButton(chanID)) {
-              e->song.pat[i].effectRows++;
-              if (e->song.pat[i].effectRows>8) e->song.pat[i].effectRows=8;
-            }
-            ImGui::EndDisabled();
-          }
-          ImGui::Spacing();
-        }
-      }
-      ImGui::TableNextColumn();
-      if (e->hasExtValue()) {
-        ImGui::TextColored(uiColors[GUI_COLOR_EE_VALUE]," %.2X",e->getExtValue());
-      }
-      float oneCharSize=ImGui::CalcTextSize("A").x;
-      threeChars=ImVec2(oneCharSize*3.0f,lineHeight);
-      twoChars=ImVec2(oneCharSize*2.0f,lineHeight);
-      //ImVec2 oneChar=ImVec2(oneCharSize,lineHeight);
-      dummyRows=(ImGui::GetWindowSize().y/lineHeight)/2;
-      // オップナー2608 i owe you one more for this horrible code
-      // previous pattern
-      ImGui::BeginDisabled();
-      if (settings.viewPrevPattern) {
-        for (int i=0; i<dummyRows-1; i++) {
-          patternRow(e->song.patLen+i-dummyRows+1,e->isPlaying(),lineHeight,chans,ord-1);
-        }
-      } else {
-        for (int i=0; i<dummyRows-1; i++) {
-          ImGui::TableNextRow(0,lineHeight);
-          ImGui::TableNextColumn();
-        }
-      }
-      ImGui::EndDisabled();
-      // active area
-      for (int i=0; i<e->song.patLen; i++) {
-        patternRow(i,e->isPlaying(),lineHeight,chans,ord);
-      }
-      // next pattern
-      ImGui::BeginDisabled();
-      if (settings.viewPrevPattern) {
-        for (int i=0; i<=dummyRows; i++) {
-          patternRow(i,e->isPlaying(),lineHeight,chans,ord+1);
-        }
-      } else {
-        for (int i=0; i<=dummyRows; i++) {
-          ImGui::TableNextRow(0,lineHeight);
-          ImGui::TableNextColumn();
-        }
-      }
-      ImGui::EndDisabled();
-      oldRow=curRow;
-      if (demandScrollX) {
-        int totalDemand=demandX-ImGui::GetScrollX();
-        if (totalDemand<80) {
-          ImGui::SetScrollX(demandX-200*dpiScale);
-        } else if (totalDemand>(ImGui::GetWindowWidth()-200*dpiScale)) {
-          ImGui::SetScrollX(demandX+200*dpiScale);
-        }
-        demandScrollX=false;
-      }
-      ImGui::EndTable();
-    }
-
-    if (fancyPattern) { // visualizer
-      e->getCommandStream(cmdStream);
-      ImDrawList* dl=ImGui::GetWindowDrawList();
-      ImVec2 off=ImGui::GetWindowPos();
-      
-      // commands
-      for (DivCommand& i: cmdStream) {
-        if (i.cmd==DIV_CMD_PITCH) continue;
-        if (i.cmd==DIV_CMD_NOTE_PORTA) continue;
-        //if (i.cmd==DIV_CMD_NOTE_ON) continue;
-        if (i.cmd==DIV_CMD_PRE_PORTA) continue;
-        if (i.cmd==DIV_CMD_PRE_NOTE) continue;
-        if (i.cmd==DIV_CMD_INSTRUMENT) continue;
-        if (i.cmd==DIV_CMD_SAMPLE_BANK) continue;
-        if (i.cmd==DIV_CMD_GET_VOLUME) continue;
-        if (i.cmd==DIV_ALWAYS_SET_VOLUME) continue;
-
-        float width=patChanX[i.chan+1]-patChanX[i.chan];
-        float speedX=0.0f;
-        float speedY=-18.0f;
-        float grav=0.6f;
-        float frict=1.0f;
-        float life=255.0f;
-        float lifeSpeed=8.0f;
-        float spread=5.0f;
-        int num=3;
-        const char* partIcon=ICON_FA_MICROCHIP;
-        ImU32* color=noteGrad;
-
-        switch (i.cmd) {
-          case DIV_CMD_NOTE_ON:
-            partIcon=ICON_FA_ASTERISK;
-            life=64.0f;
-            lifeSpeed=2.0f;
-            break;
-          case DIV_CMD_LEGATO:
-            partIcon=ICON_FA_COG;
-            color=insGrad;
-            life=64.0f;
-            lifeSpeed=2.0f;
-            break;
-          case DIV_CMD_NOTE_OFF:
-          case DIV_CMD_NOTE_OFF_ENV:
-          case DIV_CMD_ENV_RELEASE:
-            partIcon=ICON_FA_ASTERISK;
-            speedX=0.0f;
-            speedY=0.0f;
-            grav=0.0f;
-            life=24.0f;
-            lifeSpeed=4.0f;
-            break;
-          case DIV_CMD_VOLUME: {
-            float scaledVol=(float)i.value/(float)e->getMaxVolumeChan(i.chan);
-            if (scaledVol>1.0f) scaledVol=1.0f;
-            speedY=-18.0f-(10.0f*scaledVol);
-            life=128+scaledVol*127;
-            partIcon=ICON_FA_VOLUME_UP;
-            num=12.0f*pow(scaledVol,2.0);
-            color=volGrad;
-            break;
-          }
-          case DIV_CMD_PANNING: {
-            if (i.value==0) {
-              num=0;
-              break;
-            }
-            float ratio=float(((i.value>>4)&15)-(i.value&15))/MAX(((i.value>>4)&15),(i.value&15));
-            speedX=-22.0f*sin(ratio*M_PI*0.5);
-            speedY=-22.0f*cos(ratio*M_PI*0.5);
-            spread=5.0f+fabs(sin(ratio*M_PI*0.5))*7.0f;
-            grav=0.0f;
-            frict=0.96f;
-            if (((i.value>>4)&15)==(i.value&15)) {
-              partIcon=ICON_FA_ARROWS_H;
-            } else if (ratio>0) {
-              partIcon=ICON_FA_ARROW_LEFT;
-            } else {
-              partIcon=ICON_FA_ARROW_RIGHT;
-            }
-            num=9;
-            color=panGrad;
-            break;
-          }
-          case DIV_CMD_SAMPLE_FREQ:
-            speedX=0.0f;
-            speedY=0.0f;
-            grav=0.0f;
-            frict=0.98;
-            spread=19.0f;
-            life=128.0f;
-            lifeSpeed=3.0f;
-            color=sysCmd2Grad;
-            num=10+pow(i.value,0.6);
-            break;
-          default:
-            //printf("unhandled %d\n",i.cmd);
-            color=sysCmd1Grad;
-            break;
-        }
-
-        for (int j=0; j<num; j++) {
-          particles.push_back(Particle(
-            color,
-            partIcon,
-            off.x+patChanX[i.chan]+fmod(rand(),width),
-            off.y+(ImGui::GetWindowHeight()*0.5f)+randRange(0,patFont->FontSize),
-            (speedX+randRange(-spread,spread))*0.5*dpiScale,
-            (speedY+randRange(-spread,spread))*0.5*dpiScale,
-            grav,
-            frict,
-            life-randRange(0,8),
-            lifeSpeed
-          ));
-        }
-      }
-
-      // note slides
-      ImVec2 arrowPoints[7];
-      for (int i=0; i<chans; i++) {
-        DivChannelState* ch=e->getChanState(i);
-        if (ch->portaSpeed>0) {
-          ImVec4 col=uiColors[GUI_COLOR_PATTERN_EFFECT_PITCH];
-          col.w*=0.2;
-          float width=patChanX[i+1]-patChanX[i];
-
-          if (e->isPlaying()) {
-            particles.push_back(Particle(
-              pitchGrad,
-              (ch->portaNote<=ch->note)?ICON_FA_CHEVRON_DOWN:ICON_FA_CHEVRON_UP,
-              off.x+patChanX[i]+fmod(rand(),width),
-              off.y+fmod(rand(),MAX(1,ImGui::GetWindowHeight())),
-              0.0f,
-              (7.0f+(rand()%5)+pow(ch->portaSpeed,0.7f))*((ch->portaNote<=ch->note)?1:-1),
-              0.0f,
-              1.0f,
-              255.0f,
-              15.0f
-            ));
-          }
-
-          for (float j=-patChanSlideY[i]; j<ImGui::GetWindowHeight(); j+=width*0.7) {
-            ImVec2 tMin=ImVec2(off.x+patChanX[i],off.y+j);
-            ImVec2 tMax=ImVec2(off.x+patChanX[i+1],off.y+j+width*0.6);
-            if (ch->portaNote<=ch->note) {
-              arrowPoints[0]=ImLerp(tMin,tMax,ImVec2(0.1,1.0-0.8));
-              arrowPoints[1]=ImLerp(tMin,tMax,ImVec2(0.5,1.0-0.0));
-              arrowPoints[2]=ImLerp(tMin,tMax,ImVec2(0.9,1.0-0.8));
-              arrowPoints[3]=ImLerp(tMin,tMax,ImVec2(0.8,1.0-1.0));
-              arrowPoints[4]=ImLerp(tMin,tMax,ImVec2(0.5,1.0-0.37));
-              arrowPoints[5]=ImLerp(tMin,tMax,ImVec2(0.2,1.0-1.0));
-              arrowPoints[6]=arrowPoints[0];
-              dl->AddPolyline(arrowPoints,7,ImGui::GetColorU32(col),ImDrawFlags_None,5.0f*dpiScale);
-            } else {
-              arrowPoints[0]=ImLerp(tMin,tMax,ImVec2(0.1,0.8));
-              arrowPoints[1]=ImLerp(tMin,tMax,ImVec2(0.5,0.0));
-              arrowPoints[2]=ImLerp(tMin,tMax,ImVec2(0.9,0.8));
-              arrowPoints[3]=ImLerp(tMin,tMax,ImVec2(0.8,1.0));
-              arrowPoints[4]=ImLerp(tMin,tMax,ImVec2(0.5,0.37));
-              arrowPoints[5]=ImLerp(tMin,tMax,ImVec2(0.2,1.0));
-              arrowPoints[6]=arrowPoints[0];
-              dl->AddPolyline(arrowPoints,7,ImGui::GetColorU32(col),ImDrawFlags_None,5.0f*dpiScale);
-            }
-          }
-          patChanSlideY[i]+=((ch->portaNote<=ch->note)?-8:8)*dpiScale;
-          if (width>0) {
-            if (patChanSlideY[i]<0) {
-              patChanSlideY[i]=-fmod(-patChanSlideY[i],width*0.7);
-            } else {
-              patChanSlideY[i]=fmod(patChanSlideY[i],width*0.7);
-            }
-          }
-        }
-      }
-
-      // particle simulation
-      ImDrawList* fdl=ImGui::GetForegroundDrawList();
-      for (size_t i=0; i<particles.size(); i++) {
-        Particle& part=particles[i];
-        if (part.update()) {
-          if (part.life>255) part.life=255;
-          fdl->AddText(
-            iconFont,
-            iconFont->FontSize,
-            ImVec2(part.pos.x-iconFont->FontSize*0.5,part.pos.y-iconFont->FontSize*0.5),
-            part.colors[(int)part.life],
-            part.type
-          );
-        } else {
-          particles.erase(particles.begin()+i);
-          i--;
-        }
-      }
-    }
-
-    ImGui::PopStyleColor(3);
-    ImGui::PopStyleVar();
-    ImGui::PopFont();
-  }
-  ImGui::PopStyleVar();
-  if (ImGui::IsWindowFocused(ImGuiFocusedFlags_ChildWindows)) curWindow=GUI_WINDOW_PATTERN;
-  ImGui::End();
-}
-
 const char* aboutLine[57]={
   "tildearrow",
   "is proud to present",
diff --git a/src/gui/pattern.cpp b/src/gui/pattern.cpp
new file mode 100644
index 00000000..5135b304
--- /dev/null
+++ b/src/gui/pattern.cpp
@@ -0,0 +1,733 @@
+/**
+ * Furnace Tracker - multi-system chiptune tracker
+ * Copyright (C) 2021-2022 tildearrow and contributors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#define _USE_MATH_DEFINES
+#include "gui.h"
+#include "imgui_internal.h"
+#include "IconsFontAwesome4.h"
+#include "guiConst.h"
+#include <fmt/printf.h>
+
+const FurnaceGUIColors fxColors[16]={
+  GUI_COLOR_PATTERN_EFFECT_MISC, // 00
+  GUI_COLOR_PATTERN_EFFECT_PITCH, // 01
+  GUI_COLOR_PATTERN_EFFECT_PITCH, // 02
+  GUI_COLOR_PATTERN_EFFECT_PITCH, // 03
+  GUI_COLOR_PATTERN_EFFECT_PITCH, // 04
+  GUI_COLOR_PATTERN_EFFECT_VOLUME, // 05
+  GUI_COLOR_PATTERN_EFFECT_VOLUME, // 06
+  GUI_COLOR_PATTERN_EFFECT_VOLUME, // 07
+  GUI_COLOR_PATTERN_EFFECT_PANNING, // 08
+  GUI_COLOR_PATTERN_EFFECT_SPEED, // 09
+  GUI_COLOR_PATTERN_EFFECT_VOLUME, // 0A
+  GUI_COLOR_PATTERN_EFFECT_SONG, // 0B
+  GUI_COLOR_PATTERN_EFFECT_TIME, // 0C
+  GUI_COLOR_PATTERN_EFFECT_SONG, // 0D
+  GUI_COLOR_PATTERN_EFFECT_INVALID, // 0E
+  GUI_COLOR_PATTERN_EFFECT_SPEED, // 0F
+};
+
+const FurnaceGUIColors extFxColors[16]={
+  GUI_COLOR_PATTERN_EFFECT_MISC, // E0
+  GUI_COLOR_PATTERN_EFFECT_PITCH, // E1
+  GUI_COLOR_PATTERN_EFFECT_PITCH, // E2
+  GUI_COLOR_PATTERN_EFFECT_MISC, // E3
+  GUI_COLOR_PATTERN_EFFECT_MISC, // E4
+  GUI_COLOR_PATTERN_EFFECT_PITCH, // E5
+  GUI_COLOR_PATTERN_EFFECT_INVALID, // E6
+  GUI_COLOR_PATTERN_EFFECT_INVALID, // E7
+  GUI_COLOR_PATTERN_EFFECT_INVALID, // E8
+  GUI_COLOR_PATTERN_EFFECT_INVALID, // E9
+  GUI_COLOR_PATTERN_EFFECT_MISC, // EA
+  GUI_COLOR_PATTERN_EFFECT_MISC, // EB
+  GUI_COLOR_PATTERN_EFFECT_TIME, // EC
+  GUI_COLOR_PATTERN_EFFECT_TIME, // ED
+  GUI_COLOR_PATTERN_EFFECT_SONG, // EE
+  GUI_COLOR_PATTERN_EFFECT_SONG, // EF
+};
+
+inline float randRange(float min, float max) {
+  return min+((float)rand()/(float)RAND_MAX)*(max-min);
+}
+
+// draw a pattern row
+inline void FurnaceGUI::patternRow(int i, bool isPlaying, float lineHeight, int chans, int ord) {
+  static char id[32];
+  bool selectedRow=(i>=sel1.y && i<=sel2.y);
+  ImGui::TableNextRow(0,lineHeight);
+  ImGui::TableNextColumn();
+  float cursorPosY=ImGui::GetCursorPos().y-ImGui::GetScrollY();
+  // check if the row is visible
+  if (cursorPosY<-lineHeight || cursorPosY>ImGui::GetWindowSize().y) {
+    return;
+  }
+  // check if we are in range
+  if (ord<0 || ord>=e->song.ordersLen) {
+    return;
+  }
+  if (i<0 || i>=e->song.patLen) {
+    return;
+  }
+  // check overflow highlight
+  if (settings.overflowHighlight) {
+    if (edit && cursor.y==i) {
+      ImGui::TableSetBgColor(ImGuiTableBgTarget_RowBg0,ImGui::GetColorU32(uiColors[GUI_COLOR_EDITING]));
+    } else if (isPlaying && oldRow==i) {
+      ImGui::TableSetBgColor(ImGuiTableBgTarget_RowBg0,0x40ffffff);
+    } else if (e->song.hilightB>0 && !(i%e->song.hilightB)) {
+      ImGui::TableSetBgColor(ImGuiTableBgTarget_RowBg0,ImGui::GetColorU32(uiColors[GUI_COLOR_PATTERN_HI_2]));
+    } else if (e->song.hilightA>0 && !(i%e->song.hilightA)) {
+      ImGui::TableSetBgColor(ImGuiTableBgTarget_RowBg0,ImGui::GetColorU32(uiColors[GUI_COLOR_PATTERN_HI_1]));
+    }
+  }
+  // row number
+  if (settings.patRowsBase==1) {
+    ImGui::TextColored(uiColors[GUI_COLOR_PATTERN_ROW_INDEX]," %.2X ",i);
+  } else {
+    ImGui::TextColored(uiColors[GUI_COLOR_PATTERN_ROW_INDEX],"%3d ",i);
+  }
+  // for each column
+  for (int j=0; j<chans; j++) {
+    // check if channel is not hidden
+    if (!e->song.chanShow[j]) {
+      patChanX[j]=ImGui::GetCursorPosX();
+      continue;
+    }
+    int chanVolMax=e->getMaxVolumeChan(j);
+    if (chanVolMax<1) chanVolMax=1;
+    DivPattern* pat=e->song.pat[j].getPattern(e->song.orders.ord[j][ord],true);
+    ImGui::TableNextColumn();
+    patChanX[j]=ImGui::GetCursorPosX();
+
+    // check overflow highlight
+    if (!settings.overflowHighlight) {
+      if (edit && cursor.y==i) {
+        ImGui::TableSetBgColor(ImGuiTableBgTarget_CellBg,ImGui::GetColorU32(uiColors[GUI_COLOR_EDITING]));
+      } else if (isPlaying && oldRow==i) {
+        ImGui::TableSetBgColor(ImGuiTableBgTarget_CellBg,0x40ffffff);
+      } else if (e->song.hilightB>0 && !(i%e->song.hilightB)) {
+        ImGui::TableSetBgColor(ImGuiTableBgTarget_CellBg,ImGui::GetColorU32(uiColors[GUI_COLOR_PATTERN_HI_2]));
+      } else if (e->song.hilightA>0 && !(i%e->song.hilightA)) {
+        ImGui::TableSetBgColor(ImGuiTableBgTarget_CellBg,ImGui::GetColorU32(uiColors[GUI_COLOR_PATTERN_HI_1]));
+      }
+    }
+
+    // selection highlight flags
+    int sel1XSum=sel1.xCoarse*32+sel1.xFine;
+    int sel2XSum=sel2.xCoarse*32+sel2.xFine;
+    int j32=j*32;
+    bool selectedNote=selectedRow && (j32>=sel1XSum && j32<=sel2XSum);
+    bool selectedIns=selectedRow && (j32+1>=sel1XSum && j32+1<=sel2XSum);
+    bool selectedVol=selectedRow && (j32+2>=sel1XSum && j32+2<=sel2XSum);
+    bool cursorNote=(cursor.y==i && cursor.xCoarse==j && cursor.xFine==0);
+    bool cursorIns=(cursor.y==i && cursor.xCoarse==j && cursor.xFine==1);
+    bool cursorVol=(cursor.y==i && cursor.xCoarse==j && cursor.xFine==2);
+
+    // note
+    sprintf(id,"%s##PN_%d_%d",noteName(pat->data[i][0],pat->data[i][1]),i,j);
+    if (pat->data[i][0]==0 && pat->data[i][1]==0) {
+      ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_INACTIVE]);
+    } else {
+      ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_ACTIVE]);
+    }
+    if (cursorNote) {
+      ImGui::PushStyleColor(ImGuiCol_Header,uiColors[GUI_COLOR_PATTERN_CURSOR]);
+      ImGui::PushStyleColor(ImGuiCol_HeaderActive,uiColors[GUI_COLOR_PATTERN_CURSOR_ACTIVE]);
+      ImGui::PushStyleColor(ImGuiCol_HeaderHovered,uiColors[GUI_COLOR_PATTERN_CURSOR_HOVER]);
+      ImGui::Selectable(id,true,ImGuiSelectableFlags_NoPadWithHalfSpacing,threeChars);
+      demandX=ImGui::GetCursorPosX();
+      ImGui::PopStyleColor(3);
+    } else {
+      ImGui::Selectable(id,selectedNote,ImGuiSelectableFlags_NoPadWithHalfSpacing,threeChars);
+    }
+    if (ImGui::IsItemClicked()) {
+      startSelection(j,0,i);
+    }
+    if (ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenBlockedByActiveItem)) {
+      updateSelection(j,0,i);
+    }
+    ImGui::PopStyleColor();
+
+    // the following is only visible when the channel is not collapsed
+    if (!e->song.chanCollapse[j]) {
+      // instrument
+      if (pat->data[i][2]==-1) {
+        ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_INACTIVE]);
+        sprintf(id,"..##PI_%d_%d",i,j);
+      } else {
+        ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_INS]);
+        sprintf(id,"%.2X##PI_%d_%d",pat->data[i][2],i,j);
+      }
+      ImGui::SameLine(0.0f,0.0f);
+      if (cursorIns) {
+        ImGui::PushStyleColor(ImGuiCol_Header,uiColors[GUI_COLOR_PATTERN_CURSOR]);
+        ImGui::PushStyleColor(ImGuiCol_HeaderActive,uiColors[GUI_COLOR_PATTERN_CURSOR_ACTIVE]);
+        ImGui::PushStyleColor(ImGuiCol_HeaderHovered,uiColors[GUI_COLOR_PATTERN_CURSOR_HOVER]);
+        ImGui::Selectable(id,true,ImGuiSelectableFlags_NoPadWithHalfSpacing,twoChars);
+        demandX=ImGui::GetCursorPosX();
+        ImGui::PopStyleColor(3);
+      } else {
+        ImGui::Selectable(id,selectedIns,ImGuiSelectableFlags_NoPadWithHalfSpacing,twoChars);
+      }
+      if (ImGui::IsItemClicked()) {
+        startSelection(j,1,i);
+      }
+      if (ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenBlockedByActiveItem)) {
+        updateSelection(j,1,i);
+      }
+      ImGui::PopStyleColor();
+
+      // volume
+      if (pat->data[i][3]==-1) {
+        sprintf(id,"..##PV_%d_%d",i,j);
+        ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_INACTIVE]);
+      } else {
+        int volColor=(pat->data[i][3]*127)/chanVolMax;
+        if (volColor>127) volColor=127;
+        if (volColor<0) volColor=0;
+        sprintf(id,"%.2X##PV_%d_%d",pat->data[i][3],i,j);
+        ImGui::PushStyleColor(ImGuiCol_Text,volColors[volColor]);
+      }
+      ImGui::SameLine(0.0f,0.0f);
+      if (cursorVol) {
+        ImGui::PushStyleColor(ImGuiCol_Header,uiColors[GUI_COLOR_PATTERN_CURSOR]);
+        ImGui::PushStyleColor(ImGuiCol_HeaderActive,uiColors[GUI_COLOR_PATTERN_CURSOR_ACTIVE]);
+        ImGui::PushStyleColor(ImGuiCol_HeaderHovered,uiColors[GUI_COLOR_PATTERN_CURSOR_HOVER]);
+        ImGui::Selectable(id,true,ImGuiSelectableFlags_NoPadWithHalfSpacing,twoChars);
+        demandX=ImGui::GetCursorPosX();
+        ImGui::PopStyleColor(3);
+      } else {
+        ImGui::Selectable(id,selectedVol,ImGuiSelectableFlags_NoPadWithHalfSpacing,twoChars);
+      }
+      if (ImGui::IsItemClicked()) {
+        startSelection(j,2,i);
+      }
+      if (ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenBlockedByActiveItem)) {
+        updateSelection(j,2,i);
+      }
+      ImGui::PopStyleColor();
+
+      // effects
+      for (int k=0; k<e->song.pat[j].effectRows; k++) {
+        int index=4+(k<<1);
+        bool selectedEffect=selectedRow && (j32+index-1>=sel1XSum && j32+index-1<=sel2XSum);
+        bool selectedEffectVal=selectedRow && (j32+index>=sel1XSum && j32+index<=sel2XSum);
+        bool cursorEffect=(cursor.y==i && cursor.xCoarse==j && cursor.xFine==index-1);
+        bool cursorEffectVal=(cursor.y==i && cursor.xCoarse==j && cursor.xFine==index);
+        
+        // effect
+        if (pat->data[i][index]==-1) {
+          sprintf(id,"..##PE%d_%d_%d",k,i,j);
+          ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_INACTIVE]);
+        } else {
+          sprintf(id,"%.2X##PE%d_%d_%d",pat->data[i][index],k,i,j);
+          if (pat->data[i][index]<0x10) {
+            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[fxColors[pat->data[i][index]]]);
+          } else if (pat->data[i][index]<0x20) {
+            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY]);
+          } else if (pat->data[i][index]<0x30) {
+            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_SYS_SECONDARY]);
+          } else if (pat->data[i][index]<0x48) {
+            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_SYS_PRIMARY]);
+          } else if (pat->data[i][index]<0xc0) {
+            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_INVALID]);
+          } else if (pat->data[i][index]<0xd0) {
+            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_SPEED]);
+          } else if (pat->data[i][index]<0xe0) {
+            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_INVALID]);
+          } else if (pat->data[i][index]<0xf0) {
+            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[extFxColors[pat->data[i][index]-0xe0]]);
+          } else {
+            ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_PATTERN_EFFECT_INVALID]);
+          }
+        }
+        ImGui::SameLine(0.0f,0.0f);
+        if (cursorEffect) {
+          ImGui::PushStyleColor(ImGuiCol_Header,uiColors[GUI_COLOR_PATTERN_CURSOR]);  
+          ImGui::PushStyleColor(ImGuiCol_HeaderActive,uiColors[GUI_COLOR_PATTERN_CURSOR_ACTIVE]);
+          ImGui::PushStyleColor(ImGuiCol_HeaderHovered,uiColors[GUI_COLOR_PATTERN_CURSOR_HOVER]);
+          ImGui::Selectable(id,true,ImGuiSelectableFlags_NoPadWithHalfSpacing,twoChars);
+          demandX=ImGui::GetCursorPosX();
+          ImGui::PopStyleColor(3);
+        } else {
+          ImGui::Selectable(id,selectedEffect,ImGuiSelectableFlags_NoPadWithHalfSpacing,twoChars);
+        }
+        if (ImGui::IsItemClicked()) {
+          startSelection(j,index-1,i);
+        }
+        if (ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenBlockedByActiveItem)) {
+          updateSelection(j,index-1,i);
+        }
+
+        // effect value
+        if (pat->data[i][index+1]==-1) {
+          sprintf(id,"..##PF%d_%d_%d",k,i,j);
+        } else {
+          sprintf(id,"%.2X##PF%d_%d_%d",pat->data[i][index+1],k,i,j);
+        }
+        ImGui::SameLine(0.0f,0.0f);
+        if (cursorEffectVal) {
+          ImGui::PushStyleColor(ImGuiCol_Header,uiColors[GUI_COLOR_PATTERN_CURSOR]);  
+          ImGui::PushStyleColor(ImGuiCol_HeaderActive,uiColors[GUI_COLOR_PATTERN_CURSOR_ACTIVE]);
+          ImGui::PushStyleColor(ImGuiCol_HeaderHovered,uiColors[GUI_COLOR_PATTERN_CURSOR_HOVER]);
+          ImGui::Selectable(id,true,ImGuiSelectableFlags_NoPadWithHalfSpacing,twoChars);
+          demandX=ImGui::GetCursorPosX();
+          ImGui::PopStyleColor(3);
+        } else {
+          ImGui::Selectable(id,selectedEffectVal,ImGuiSelectableFlags_NoPadWithHalfSpacing,twoChars);
+        }
+        if (ImGui::IsItemClicked()) {
+          startSelection(j,index,i);
+        }
+        if (ImGui::IsItemHovered(ImGuiHoveredFlags_AllowWhenBlockedByActiveItem)) {
+          updateSelection(j,index,i);
+        }
+        ImGui::PopStyleColor();
+      }
+    }
+  }
+  ImGui::TableNextColumn();
+  patChanX[chans]=ImGui::GetCursorPosX();
+}
+
+void FurnaceGUI::drawPattern() {
+  if (nextWindow==GUI_WINDOW_PATTERN) {
+    patternOpen=true;
+    ImGui::SetNextWindowFocus();
+    nextWindow=GUI_WINDOW_NOTHING;
+  }
+  if (!patternOpen) return;
+  if (e->isPlaying() && followPattern) cursor.y=oldRow;
+  demandX=0;
+  sel1=selStart;
+  sel2=selEnd;
+  if (sel2.y<sel1.y) {
+    sel2.y^=sel1.y;
+    sel1.y^=sel2.y;
+    sel2.y^=sel1.y;
+  }
+  if (sel2.xCoarse<sel1.xCoarse) {
+    sel2.xCoarse^=sel1.xCoarse;
+    sel1.xCoarse^=sel2.xCoarse;
+    sel2.xCoarse^=sel1.xCoarse;
+
+    sel2.xFine^=sel1.xFine;
+    sel1.xFine^=sel2.xFine;
+    sel2.xFine^=sel1.xFine;
+  } else if (sel2.xCoarse==sel1.xCoarse && sel2.xFine<sel1.xFine) {
+    sel2.xFine^=sel1.xFine;
+    sel1.xFine^=sel2.xFine;
+    sel2.xFine^=sel1.xFine;
+  }
+  ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding,ImVec2(0.0f,0.0f));
+  if (ImGui::Begin("Pattern",&patternOpen)) {
+    //ImGui::SetWindowSize(ImVec2(scrW*dpiScale,scrH*dpiScale));
+    patWindowPos=ImGui::GetWindowPos();
+    patWindowSize=ImGui::GetWindowSize();
+    //char id[32];
+    ImGui::PushFont(patFont);
+    int ord=e->isPlaying()?oldOrder:e->getOrder();
+    oldOrder=e->getOrder();
+    int chans=e->getTotalChannelCount();
+    int displayChans=0;
+    for (int i=0; i<chans; i++) {
+      if (e->song.chanShow[i]) displayChans++;
+    }
+    ImGui::PushStyleVar(ImGuiStyleVar_CellPadding,ImVec2(0.0f,0.0f));
+    ImGui::PushStyleColor(ImGuiCol_Header,uiColors[GUI_COLOR_PATTERN_SELECTION]);
+    ImGui::PushStyleColor(ImGuiCol_HeaderHovered,uiColors[GUI_COLOR_PATTERN_SELECTION_HOVER]);
+    ImGui::PushStyleColor(ImGuiCol_HeaderActive,uiColors[GUI_COLOR_PATTERN_SELECTION_ACTIVE]);
+    if (ImGui::BeginTable("PatternView",displayChans+2,ImGuiTableFlags_BordersInnerV|ImGuiTableFlags_ScrollX|ImGuiTableFlags_ScrollY|ImGuiTableFlags_NoPadInnerX)) {
+      ImGui::TableSetupColumn("pos",ImGuiTableColumnFlags_WidthFixed);
+      char chanID[2048];
+      float lineHeight=(ImGui::GetTextLineHeight()+2*dpiScale);
+      int curRow=e->getRow();
+      if (e->isPlaying() && followPattern) updateScroll(curRow);
+      if (nextScroll>-0.5f) {
+        ImGui::SetScrollY(nextScroll);
+        nextScroll=-1.0f;
+        nextAddScroll=0.0f;
+      }
+      if (nextAddScroll!=0.0f) {
+        ImGui::SetScrollY(ImGui::GetScrollY()+nextAddScroll);
+        nextScroll=-1.0f;
+        nextAddScroll=0.0f;
+      }
+      ImGui::TableSetupScrollFreeze(1,1);
+      for (int i=0; i<chans; i++) {
+        if (!e->song.chanShow[i]) continue;
+        ImGui::TableSetupColumn(fmt::sprintf("c%d",i).c_str(),ImGuiTableColumnFlags_WidthFixed);
+      }
+      ImGui::TableNextRow();
+      ImGui::TableNextColumn();
+      if (ImGui::Selectable(extraChannelButtons?" --##ExtraChannelButtons":" ++##ExtraChannelButtons",false,ImGuiSelectableFlags_NoPadWithHalfSpacing,ImVec2(0.0f,lineHeight+1.0f*dpiScale))) {
+        extraChannelButtons=!extraChannelButtons;
+      }
+      if (ImGui::IsItemClicked(ImGuiMouseButton_Right)) {
+        fancyPattern=!fancyPattern;
+        e->enableCommandStream(fancyPattern);
+        e->getCommandStream(cmdStream);
+        cmdStream.clear();
+      }
+      for (int i=0; i<chans; i++) {
+        if (!e->song.chanShow[i]) continue;
+        ImGui::TableNextColumn();
+        bool displayTooltip=false;
+        if (e->song.chanCollapse[i]) {
+          const char* chName=e->getChannelShortName(i);
+          if (strlen(chName)>3) {
+            snprintf(chanID,2048,"...##_CH%d",i);
+          } else {
+            snprintf(chanID,2048,"%s##_CH%d",chName,i);
+          }
+          displayTooltip=true;
+        } else {
+          const char* chName=e->getChannelName(i);
+          size_t chNameLimit=6+4*e->song.pat[i].effectRows;
+          if (strlen(chName)>chNameLimit) {
+            String shortChName=chName;
+            shortChName.resize(chNameLimit-3);
+            shortChName+="...";
+            snprintf(chanID,2048," %s##_CH%d",shortChName.c_str(),i);
+            displayTooltip=true;
+          } else {
+            snprintf(chanID,2048," %s##_CH%d",chName,i);
+          }
+        }
+        bool muted=e->isChannelMuted(i);
+        ImVec4 chanHead=muted?uiColors[GUI_COLOR_CHANNEL_MUTED]:uiColors[GUI_COLOR_CHANNEL_FM+e->getChannelType(i)];
+        ImVec4 chanHeadActive=chanHead;
+        ImVec4 chanHeadHover=chanHead;
+        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+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);
+        // help me why is the color leakingggggggg
+        ImGui::TableSetBgColor(ImGuiTableBgTarget_CellBg,ImGui::GetColorU32(chanHead));
+        if (muted) ImGui::PushStyleColor(ImGuiCol_Text,uiColors[GUI_COLOR_CHANNEL_MUTED]);
+        ImGui::Selectable(chanID,true,ImGuiSelectableFlags_NoPadWithHalfSpacing,ImVec2(0.0f,lineHeight+1.0f*dpiScale));
+        if (displayTooltip && ImGui::IsItemHovered()) {
+          ImGui::SetTooltip("%s",e->getChannelName(i));
+        }
+        if (ImGui::IsItemClicked(ImGuiMouseButton_Left)) {
+          if (settings.soloAction!=1 && soloTimeout>0 && soloChan==i) {
+            e->toggleSolo(i);
+            soloTimeout=0;
+          } else {
+            e->toggleMute(i);
+            soloTimeout=20;
+            soloChan=i;
+          }
+        }
+        if (muted) ImGui::PopStyleColor();
+        ImGui::PopStyleColor(3);
+        if (settings.soloAction!=2) if (ImGui::IsItemClicked(ImGuiMouseButton_Right)) {
+          e->toggleSolo(i);
+        }
+        if (extraChannelButtons) {
+          snprintf(chanID,2048,"%c##_HCH%d",e->song.chanCollapse[i]?'+':'-',i);
+          ImGui::SetCursorPosX(ImGui::GetCursorPosX()+4.0f*dpiScale);
+          if (ImGui::SmallButton(chanID)) {
+            e->song.chanCollapse[i]=!e->song.chanCollapse[i];
+          }
+          if (!e->song.chanCollapse[i]) {
+            ImGui::SameLine();
+            snprintf(chanID,2048,"<##_LCH%d",i);
+            ImGui::BeginDisabled(e->song.pat[i].effectRows<=1);
+            if (ImGui::SmallButton(chanID)) {
+              e->song.pat[i].effectRows--;
+              if (e->song.pat[i].effectRows<1) e->song.pat[i].effectRows=1;
+            }
+            ImGui::EndDisabled();
+            ImGui::SameLine();
+            ImGui::BeginDisabled(e->song.pat[i].effectRows>=8);
+            snprintf(chanID,2048,">##_RCH%d",i);
+            if (ImGui::SmallButton(chanID)) {
+              e->song.pat[i].effectRows++;
+              if (e->song.pat[i].effectRows>8) e->song.pat[i].effectRows=8;
+            }
+            ImGui::EndDisabled();
+          }
+          ImGui::Spacing();
+        }
+      }
+      ImGui::TableNextColumn();
+      if (e->hasExtValue()) {
+        ImGui::TextColored(uiColors[GUI_COLOR_EE_VALUE]," %.2X",e->getExtValue());
+      }
+      float oneCharSize=ImGui::CalcTextSize("A").x;
+      threeChars=ImVec2(oneCharSize*3.0f,lineHeight);
+      twoChars=ImVec2(oneCharSize*2.0f,lineHeight);
+      //ImVec2 oneChar=ImVec2(oneCharSize,lineHeight);
+      dummyRows=(ImGui::GetWindowSize().y/lineHeight)/2;
+      // オップナー2608 i owe you one more for this horrible code
+      // previous pattern
+      ImGui::BeginDisabled();
+      if (settings.viewPrevPattern) {
+        for (int i=0; i<dummyRows-1; i++) {
+          patternRow(e->song.patLen+i-dummyRows+1,e->isPlaying(),lineHeight,chans,ord-1);
+        }
+      } else {
+        for (int i=0; i<dummyRows-1; i++) {
+          ImGui::TableNextRow(0,lineHeight);
+          ImGui::TableNextColumn();
+        }
+      }
+      ImGui::EndDisabled();
+      // active area
+      for (int i=0; i<e->song.patLen; i++) {
+        patternRow(i,e->isPlaying(),lineHeight,chans,ord);
+      }
+      // next pattern
+      ImGui::BeginDisabled();
+      if (settings.viewPrevPattern) {
+        for (int i=0; i<=dummyRows; i++) {
+          patternRow(i,e->isPlaying(),lineHeight,chans,ord+1);
+        }
+      } else {
+        for (int i=0; i<=dummyRows; i++) {
+          ImGui::TableNextRow(0,lineHeight);
+          ImGui::TableNextColumn();
+        }
+      }
+      ImGui::EndDisabled();
+      oldRow=curRow;
+      if (demandScrollX) {
+        int totalDemand=demandX-ImGui::GetScrollX();
+        if (totalDemand<80) {
+          ImGui::SetScrollX(demandX-200*dpiScale);
+        } else if (totalDemand>(ImGui::GetWindowWidth()-200*dpiScale)) {
+          ImGui::SetScrollX(demandX+200*dpiScale);
+        }
+        demandScrollX=false;
+      }
+      ImGui::EndTable();
+    }
+
+    if (fancyPattern) { // visualizer
+      e->getCommandStream(cmdStream);
+      ImDrawList* dl=ImGui::GetWindowDrawList();
+      ImVec2 off=ImGui::GetWindowPos();
+      
+      // commands
+      for (DivCommand& i: cmdStream) {
+        if (i.cmd==DIV_CMD_PITCH) continue;
+        if (i.cmd==DIV_CMD_NOTE_PORTA) continue;
+        //if (i.cmd==DIV_CMD_NOTE_ON) continue;
+        if (i.cmd==DIV_CMD_PRE_PORTA) continue;
+        if (i.cmd==DIV_CMD_PRE_NOTE) continue;
+        if (i.cmd==DIV_CMD_INSTRUMENT) continue;
+        if (i.cmd==DIV_CMD_SAMPLE_BANK) continue;
+        if (i.cmd==DIV_CMD_GET_VOLUME) continue;
+        if (i.cmd==DIV_ALWAYS_SET_VOLUME) continue;
+
+        float width=patChanX[i.chan+1]-patChanX[i.chan];
+        float speedX=0.0f;
+        float speedY=-18.0f;
+        float grav=0.6f;
+        float frict=1.0f;
+        float life=255.0f;
+        float lifeSpeed=8.0f;
+        float spread=5.0f;
+        int num=3;
+        const char* partIcon=ICON_FA_MICROCHIP;
+        ImU32* color=noteGrad;
+
+        switch (i.cmd) {
+          case DIV_CMD_NOTE_ON:
+            partIcon=ICON_FA_ASTERISK;
+            life=64.0f;
+            lifeSpeed=2.0f;
+            break;
+          case DIV_CMD_LEGATO:
+            partIcon=ICON_FA_COG;
+            color=insGrad;
+            life=64.0f;
+            lifeSpeed=2.0f;
+            break;
+          case DIV_CMD_NOTE_OFF:
+          case DIV_CMD_NOTE_OFF_ENV:
+          case DIV_CMD_ENV_RELEASE:
+            partIcon=ICON_FA_ASTERISK;
+            speedX=0.0f;
+            speedY=0.0f;
+            grav=0.0f;
+            life=24.0f;
+            lifeSpeed=4.0f;
+            break;
+          case DIV_CMD_VOLUME: {
+            float scaledVol=(float)i.value/(float)e->getMaxVolumeChan(i.chan);
+            if (scaledVol>1.0f) scaledVol=1.0f;
+            speedY=-18.0f-(10.0f*scaledVol);
+            life=128+scaledVol*127;
+            partIcon=ICON_FA_VOLUME_UP;
+            num=12.0f*pow(scaledVol,2.0);
+            color=volGrad;
+            break;
+          }
+          case DIV_CMD_PANNING: {
+            if (i.value==0) {
+              num=0;
+              break;
+            }
+            float ratio=float(((i.value>>4)&15)-(i.value&15))/MAX(((i.value>>4)&15),(i.value&15));
+            speedX=-22.0f*sin(ratio*M_PI*0.5);
+            speedY=-22.0f*cos(ratio*M_PI*0.5);
+            spread=5.0f+fabs(sin(ratio*M_PI*0.5))*7.0f;
+            grav=0.0f;
+            frict=0.96f;
+            if (((i.value>>4)&15)==(i.value&15)) {
+              partIcon=ICON_FA_ARROWS_H;
+            } else if (ratio>0) {
+              partIcon=ICON_FA_ARROW_LEFT;
+            } else {
+              partIcon=ICON_FA_ARROW_RIGHT;
+            }
+            num=9;
+            color=panGrad;
+            break;
+          }
+          case DIV_CMD_SAMPLE_FREQ:
+            speedX=0.0f;
+            speedY=0.0f;
+            grav=0.0f;
+            frict=0.98;
+            spread=19.0f;
+            life=128.0f;
+            lifeSpeed=3.0f;
+            color=sysCmd2Grad;
+            num=10+pow(i.value,0.6);
+            break;
+          default:
+            //printf("unhandled %d\n",i.cmd);
+            color=sysCmd1Grad;
+            break;
+        }
+
+        for (int j=0; j<num; j++) {
+          particles.push_back(Particle(
+            color,
+            partIcon,
+            off.x+patChanX[i.chan]+fmod(rand(),width),
+            off.y+(ImGui::GetWindowHeight()*0.5f)+randRange(0,patFont->FontSize),
+            (speedX+randRange(-spread,spread))*0.5*dpiScale,
+            (speedY+randRange(-spread,spread))*0.5*dpiScale,
+            grav,
+            frict,
+            life-randRange(0,8),
+            lifeSpeed
+          ));
+        }
+      }
+
+      // note slides
+      ImVec2 arrowPoints[7];
+      for (int i=0; i<chans; i++) {
+        DivChannelState* ch=e->getChanState(i);
+        if (ch->portaSpeed>0) {
+          ImVec4 col=uiColors[GUI_COLOR_PATTERN_EFFECT_PITCH];
+          col.w*=0.2;
+          float width=patChanX[i+1]-patChanX[i];
+
+          if (e->isPlaying()) {
+            particles.push_back(Particle(
+              pitchGrad,
+              (ch->portaNote<=ch->note)?ICON_FA_CHEVRON_DOWN:ICON_FA_CHEVRON_UP,
+              off.x+patChanX[i]+fmod(rand(),width),
+              off.y+fmod(rand(),MAX(1,ImGui::GetWindowHeight())),
+              0.0f,
+              (7.0f+(rand()%5)+pow(ch->portaSpeed,0.7f))*((ch->portaNote<=ch->note)?1:-1),
+              0.0f,
+              1.0f,
+              255.0f,
+              15.0f
+            ));
+          }
+
+          for (float j=-patChanSlideY[i]; j<ImGui::GetWindowHeight(); j+=width*0.7) {
+            ImVec2 tMin=ImVec2(off.x+patChanX[i],off.y+j);
+            ImVec2 tMax=ImVec2(off.x+patChanX[i+1],off.y+j+width*0.6);
+            if (ch->portaNote<=ch->note) {
+              arrowPoints[0]=ImLerp(tMin,tMax,ImVec2(0.1,1.0-0.8));
+              arrowPoints[1]=ImLerp(tMin,tMax,ImVec2(0.5,1.0-0.0));
+              arrowPoints[2]=ImLerp(tMin,tMax,ImVec2(0.9,1.0-0.8));
+              arrowPoints[3]=ImLerp(tMin,tMax,ImVec2(0.8,1.0-1.0));
+              arrowPoints[4]=ImLerp(tMin,tMax,ImVec2(0.5,1.0-0.37));
+              arrowPoints[5]=ImLerp(tMin,tMax,ImVec2(0.2,1.0-1.0));
+              arrowPoints[6]=arrowPoints[0];
+              dl->AddPolyline(arrowPoints,7,ImGui::GetColorU32(col),ImDrawFlags_None,5.0f*dpiScale);
+            } else {
+              arrowPoints[0]=ImLerp(tMin,tMax,ImVec2(0.1,0.8));
+              arrowPoints[1]=ImLerp(tMin,tMax,ImVec2(0.5,0.0));
+              arrowPoints[2]=ImLerp(tMin,tMax,ImVec2(0.9,0.8));
+              arrowPoints[3]=ImLerp(tMin,tMax,ImVec2(0.8,1.0));
+              arrowPoints[4]=ImLerp(tMin,tMax,ImVec2(0.5,0.37));
+              arrowPoints[5]=ImLerp(tMin,tMax,ImVec2(0.2,1.0));
+              arrowPoints[6]=arrowPoints[0];
+              dl->AddPolyline(arrowPoints,7,ImGui::GetColorU32(col),ImDrawFlags_None,5.0f*dpiScale);
+            }
+          }
+          patChanSlideY[i]+=((ch->portaNote<=ch->note)?-8:8)*dpiScale;
+          if (width>0) {
+            if (patChanSlideY[i]<0) {
+              patChanSlideY[i]=-fmod(-patChanSlideY[i],width*0.7);
+            } else {
+              patChanSlideY[i]=fmod(patChanSlideY[i],width*0.7);
+            }
+          }
+        }
+      }
+
+      // particle simulation
+      ImDrawList* fdl=ImGui::GetForegroundDrawList();
+      for (size_t i=0; i<particles.size(); i++) {
+        Particle& part=particles[i];
+        if (part.update()) {
+          if (part.life>255) part.life=255;
+          fdl->AddText(
+            iconFont,
+            iconFont->FontSize,
+            ImVec2(part.pos.x-iconFont->FontSize*0.5,part.pos.y-iconFont->FontSize*0.5),
+            part.colors[(int)part.life],
+            part.type
+          );
+        } else {
+          particles.erase(particles.begin()+i);
+          i--;
+        }
+      }
+    }
+
+    ImGui::PopStyleColor(3);
+    ImGui::PopStyleVar();
+    ImGui::PopFont();
+  }
+  ImGui::PopStyleVar();
+  if (ImGui::IsWindowFocused(ImGuiFocusedFlags_ChildWindows)) curWindow=GUI_WINDOW_PATTERN;
+  ImGui::End();
+}
+