GUI: prepare to improve pattern manager

src/engine/song.cpp

@@ -57,6 +57,12 @@ void DivSubSong::rearrangePatterns() {
   }
 }
 
+void DivSubSong::sortOrders() {
+}
+
+void DivSubSong::makePatUnique() {
+}
+
 void DivSong::clearSongData() {
   for (DivSubSong* i: subsong) {
     i->clearData();

src/engine/song.h

@@ -175,6 +175,8 @@ struct DivSubSong {
   void clearData();
   void optimizePatterns();
   void rearrangePatterns();
+  void sortOrders();
+  void makePatUnique();
 
   DivSubSong(): 
     hilightA(4),

src/gui/patManager.cpp

@@ -33,7 +33,9 @@ void FurnaceGUI::drawPatManager() {
   unsigned char isUsed[DIV_MAX_PATTERNS];
   bool isNull[DIV_MAX_PATTERNS];
   if (ImGui::Begin("Pattern Manager",&patManagerOpen,globalWinFlags)) {
-    ImGui::Text("Global Tasks");
+    ImGui::Text("Global Tasks:");
+
+    ImGui::SameLine();
 
     if (ImGui::Button("De-duplicate patterns")) {
       e->lockEngine([this]() {
@@ -48,6 +50,20 @@ void FurnaceGUI::drawPatManager() {
       });
       MARK_MODIFIED;
     }
+    ImGui::SameLine();
+    if (ImGui::Button("Sort orders")) {
+      e->lockEngine([this]() {
+        e->curSubSong->sortOrders();
+      });
+      MARK_MODIFIED;
+    }
+    ImGui::SameLine();
+    if (ImGui::Button("Make patterns unique")) {
+      e->lockEngine([this]() {
+        e->curSubSong->makePatUnique();
+      });
+      MARK_MODIFIED;
+    }
 
     if (ImGui::BeginTable("PatManTable",257,ImGuiTableFlags_ScrollX|ImGuiTableFlags_SizingFixedFit)) {
       ImGui::PushFont(patFont);