GUI: add option to center pattern - INCOMPLETE

if you right click on the left area it doesn't work

src/gui/gui.cpp

@@ -5420,6 +5420,7 @@ FurnaceGUI::FurnaceGUI():
   curWindow(GUI_WINDOW_NOTHING),
   nextWindow(GUI_WINDOW_NOTHING),
   curWindowLast(GUI_WINDOW_NOTHING),
+  lastPatternWidth(0.0f),
   nextDesc(NULL),
   latchNote(-1),
   latchIns(-2),

src/gui/gui.h

@@ -1209,6 +1209,7 @@ class FurnaceGUI {
     int midiOutClock;
     int midiOutMode;
     int maxRecentFile;
+    int centerPattern;
     unsigned int maxUndoSteps;
     String mainFontPath;
     String patFontPath;
@@ -1334,6 +1335,7 @@ class FurnaceGUI {
       midiOutClock(0),
       midiOutMode(1),
       maxRecentFile(10),
+      centerPattern(0),
       maxUndoSteps(100),
       mainFontPath(""),
       patFontPath(""),
@@ -1373,6 +1375,7 @@ class FurnaceGUI {
   float peak[2];
   float patChanX[DIV_MAX_CHANS+1];
   float patChanSlideY[DIV_MAX_CHANS+1];
+  float lastPatternWidth;
   const int* nextDesc;
   String nextDescName;
 

src/gui/pattern.cpp

@@ -403,6 +403,12 @@ void FurnaceGUI::drawPattern() {
     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 (settings.centerPattern) {
+      float centerOff=(ImGui::GetContentRegionAvail().x-lastPatternWidth)*0.5;
+      if (centerOff>0.0f) {
+        ImGui::SetCursorPosX(ImGui::GetCursorPosX()+centerOff);
+      }
+    }
     if (ImGui::BeginTable("PatternView",displayChans+2,ImGuiTableFlags_BordersInnerV|ImGuiTableFlags_ScrollX|ImGuiTableFlags_ScrollY|ImGuiTableFlags_NoPadInnerX|ImGuiTableFlags_NoBordersInFrozenArea)) {
       ImGui::TableSetupColumn("pos",ImGuiTableColumnFlags_WidthFixed);
       char chanID[2048];
@@ -427,6 +433,7 @@ void FurnaceGUI::drawPattern() {
       }
       ImGui::TableNextRow();
       ImGui::TableNextColumn();
+      float lpwStart=ImGui::GetCursorPosX();
       if (ImGui::Selectable((extraChannelButtons==2)?" --##ExtraChannelButtons":" ++##ExtraChannelButtons",false,ImGuiSelectableFlags_NoPadWithHalfSpacing,ImVec2(0.0f,lineHeight+1.0f*dpiScale))) {
         if (++extraChannelButtons>2) extraChannelButtons=0;
       }
@@ -839,6 +846,7 @@ void FurnaceGUI::drawPattern() {
         }
       }
       ImGui::TableNextColumn();
+      lastPatternWidth=ImGui::GetCursorPosX()-lpwStart+ImGui::GetStyle().ScrollbarSize;
       if (e->hasExtValue()) {
         ImGui::TextColored(uiColors[GUI_COLOR_EE_VALUE]," %.2X",e->getExtValue());
       }

src/gui/settings.cpp

@@ -1443,6 +1443,11 @@ void FurnaceGUI::drawSettings() {
             settings.germanNotation=germanNotationB;
           }
 
+          bool centerPatternB=settings.centerPattern;
+          if (ImGui::Checkbox("Center pattern view",&centerPatternB)) {
+            settings.centerPattern=centerPatternB;
+          }
+
           bool unsignedDetuneB=settings.unsignedDetune;
           if (ImGui::Checkbox("Unsigned FM detune values",&unsignedDetuneB)) {
             settings.unsignedDetune=unsignedDetuneB;
@@ -2363,6 +2368,7 @@ void FurnaceGUI::syncSettings() {
   settings.maxRecentFile=e->getConfInt("maxRecentFile",10);
   settings.midiOutClock=e->getConfInt("midiOutClock",0);
   settings.midiOutMode=e->getConfInt("midiOutMode",1);
+  settings.centerPattern=e->getConfInt("centerPattern",0);
 
   clampSetting(settings.mainFontSize,2,96);
   clampSetting(settings.patFontSize,2,96);
@@ -2466,6 +2472,7 @@ void FurnaceGUI::syncSettings() {
   clampSetting(settings.maxRecentFile,0,30);
   clampSetting(settings.midiOutClock,0,1);
   clampSetting(settings.midiOutMode,0,2);
+  clampSetting(settings.centerPattern,0,1);
 
   String initialSys2=e->getConfString("initialSys2","");
   if (initialSys2.empty()) {
@@ -2630,6 +2637,7 @@ void FurnaceGUI::commitSettings() {
   e->setConf("maxRecentFile",settings.maxRecentFile);
   e->setConf("midiOutClock",settings.midiOutClock);
   e->setConf("midiOutMode",settings.midiOutMode);
+  e->setConf("centerPattern",settings.centerPattern);
 
   // colors
   for (int i=0; i<GUI_COLOR_MAX; i++) {