A couple small but important fixes:

- Don't adjust scroll position in TrackListView after a requery if the
  query contents haven't actually changed
- Ensure resizing doesn't lose the selected item in ListWindow
- Added the concept of query hashes and generalized TrackListQueryBase
  so different types of queries can be supplied to a TrackListView.

src/core/audio/Stream.h

@@ -75,7 +75,6 @@ namespace musik { namespace core { namespace audio {
             BufferPtr GetEmptyBuffer();
             void LoadDecoderPlugins();
 
-        private:
             typedef std::list<BufferPtr> BufferList;
             typedef std::shared_ptr<IDecoderFactory> DecoderFactoryPtr;
             typedef std::vector<DecoderFactoryPtr> DecoderFactoryList;

src/musikbox/app/layout/LibraryLayout.cpp

@@ -17,7 +17,7 @@ using namespace musik::core::library::constants;
     #define TRANSPORT_HEIGHT 2
 #endif
 
-#define DEFAULT_CATEGORY constants::Track::ALBUM_ID
+#define DEFAULT_CATEGORY constants::Track::ARTIST_ID
 
 using namespace musik::core;
 using namespace musik::core::audio;

src/musikbox/app/query/TrackListQueryBase.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include <core/library/query/QueryBase.h>
+#include <core/db/Connection.h>
+#include <core/library/track/Track.h>
+#include "CategoryListViewQuery.h"
+
+namespace musik {
+    namespace box {
+        class TrackListQueryBase : public musik::core::query::QueryBase {
+            public:
+                typedef std::shared_ptr<
+                    std::vector<musik::core::TrackPtr> > Result;
+
+                typedef std::shared_ptr<std::set<size_t> > Headers;
+
+                virtual ~TrackListQueryBase() { };
+                virtual std::string Name() = 0;
+                virtual Result GetResult() = 0;
+                virtual Headers GetHeaders() = 0;
+                virtual size_t GetQueryHash() = 0;
+        };
+    }
+}

src/musikbox/app/query/TrackListViewQuery.cpp

@@ -21,6 +21,9 @@ TrackListViewQuery::TrackListViewQuery(LibraryPtr library, const std::string& co
     this->id = id;
     this->result.reset(new std::vector<TrackPtr>());
     this->headers.reset(new std::set<size_t>());
+    this->hash = 0;
+
+    this->GetQueryHash();
 }
 
 TrackListViewQuery::~TrackListViewQuery() {
@@ -35,13 +38,24 @@ TrackListViewQuery::Headers TrackListViewQuery::GetHeaders() {
     return this->headers;
 }
 
+size_t TrackListViewQuery::GetQueryHash() {
+    if (this->hash == 0) {
+        std::string parts = boost::str(
+            boost::format("%s-%s") % this->column % this->id);
+
+        this->hash = std::hash<std::string>()(parts);
+    }
+
+    return this->hash;
+}
+
 bool TrackListViewQuery::OnRun(Connection& db) {
     if (result) {
         result.reset(new std::vector<TrackPtr>());
         headers.reset(new std::set<size_t>());
     }
 
-    std::string query = boost::str(boost::format(
+    this->query = boost::str(boost::format(
         "SELECT DISTINCT t.id, t.track, t.bpm, t.duration, t.filesize, t.year, t.title, t.filename, t.thumbnail_id, al.name AS album, gn.name AS genre, ar.name AS artist, t.filetime " \
         "FROM tracks t, paths p, albums al, artists ar, genres gn " \
         "WHERE t.%s=? AND t.album_id=al.id AND t.visual_genre_id=gn.id AND t.visual_artist_id=ar.id "
@@ -50,7 +64,7 @@ bool TrackListViewQuery::OnRun(Connection& db) {
     std::string lastAlbum;
     size_t index = 0;
 
-    Statement trackQuery(query.c_str(), db);
+    Statement trackQuery(this->query.c_str(), db);
 
     trackQuery.BindInt(0, this->id);
     while (trackQuery.Step() == Row) {

src/musikbox/app/query/TrackListViewQuery.h

@@ -3,38 +3,37 @@
 #include <core/library/query/QueryBase.h>
 #include <core/db/Connection.h>
 #include <core/library/track/Track.h>
-#include "CategoryListViewQuery.h"
+
+#include "TrackListQueryBase.h"
 
 namespace musik {
     namespace box {
-        class TrackListViewQuery : public musik::core::query::QueryBase {
+        class TrackListViewQuery : public TrackListQueryBase {
             public:
-                typedef std::shared_ptr<
-                    std::vector<musik::core::TrackPtr> > Result;
-
-                typedef std::shared_ptr<std::set<size_t> > Headers;
-
                 TrackListViewQuery(
                     musik::core::LibraryPtr library,
-                    const std::string& column, DBID id);
+                    const std::string& column, 
+                    DBID id);
 
                 virtual ~TrackListViewQuery();
 
-                std::string Name() { return "TrackListViewQuery"; }
+                virtual std::string Name() { return "TrackListViewQuery"; }
 
                 virtual Result GetResult();
                 virtual Headers GetHeaders();
+                virtual size_t GetQueryHash();
 
             protected:
                 virtual bool OnRun(musik::core::db::Connection &db);
 
-                Result result;
-                Headers headers;
-
             private:
                 musik::core::LibraryPtr library;
+                Result result;
+                Headers headers;
                 std::string column;
                 DBID id;
+                std::string query;
+                size_t hash;
         };
     }
 }

src/musikbox/app/window/CommandWindow.cpp

@@ -140,16 +140,18 @@ void CommandWindow::Help() {
     this->output->WriteLine("  <F1> console view", s);
     this->output->WriteLine("  <F2> library view", s);
     this->output->WriteLine("\n", s);
-    this->output->WriteLine("  play <uri>: play audio at location", s);
+    this->output->WriteLine("  addir <dir>: add a music directory", s);
+    this->output->WriteLine("  rmdir <dir>: remove a music directory", s);
+    this->output->WriteLine("  lsdirs: list scanned directories", s);
+    this->output->WriteLine("  rescan: rescan paths for new metadata", s);
+    this->output->WriteLine("\n", s);
+    this->output->WriteLine("  play <uri>: play audio at <uri>", s);
     this->output->WriteLine("  pause: pause/resume", s);
-    this->output->WriteLine("  stop: stop all playback", s);
+    this->output->WriteLine("  stop: stop and clean up everything", s);
     this->output->WriteLine("  volume: <0 - 100>: set % volume", s);
     this->output->WriteLine("  clear: clear the log window", s);
     this->output->WriteLine("  seek <seconds>: seek to <seconds> into track", s);
-    this->output->WriteLine("  addir <dir>: add a directory to be indexed", s);
-    this->output->WriteLine("  rmdir <dir>: remove indexed directory path", s);
-    this->output->WriteLine("  lsdirs: list scanned directories", s);
-    this->output->WriteLine("  rescan: rescan paths for new metadata", s);
+    this->output->WriteLine("\n", s);
     this->output->WriteLine("  plugins: list loaded plugins", s);
     this->output->WriteLine("\n  <ctrl+d>: quit\n", s);
 }
@@ -254,10 +256,9 @@ void CommandWindow::ListPlugins() const {
     PluginList::iterator it = plugins.begin();
     for (; it != plugins.end(); it++) {
         std::string format =
-            "plugin:\n"
-            "  name: " + std::string((*it)->Name()) + " "
+            "    " + std::string((*it)->Name()) + " "
             "v" + std::string((*it)->Version()) + "\n"
-            "  author: " + std::string((*it)->Author()) + "\n";
+            "    by " + std::string((*it)->Author()) + "\n";
 
         this->output->WriteLine(format, BOX_COLOR_RED_ON_BLUE);
     }

src/musikbox/app/window/TrackListView.cpp

@@ -37,6 +37,7 @@ TrackListView::TrackListView(PlaybackService& playback, LibraryPtr library)
     this->library->QueryCompleted.connect(this, &TrackListView::OnQueryCompleted);
     this->playback.TrackChanged.connect(this, &TrackListView::OnTrackChanged);
     this->adapter = new Adapter(*this);
+    this->lastQueryHash = 0;
 }
 
 TrackListView::~TrackListView() {
@@ -71,8 +72,16 @@ void TrackListView::ProcessMessage(IMessage &message) {
         if (this->query && this->query->GetStatus() == IQuery::Finished) {
             this->metadata = this->query->GetResult();
             this->headers = this->query->GetHeaders();
+
+            /* if the query was functionally the same as the last query, don't
+            mess with the selected index */
+            if (this->lastQueryHash != query->GetQueryHash()) {
+                this->SetSelectedIndex(0);
+            }
+
+            this->lastQueryHash = this->query->GetQueryHash();
             this->query.reset();
-            this->SetSelectedIndex(0);
+
             this->OnAdapterChanged();
         }
     }

src/musikbox/app/window/TrackListView.h

@@ -58,6 +58,8 @@ namespace musik {
                 PlaybackService& playback;
                 musik::core::TrackPtr playing;
                 musik::core::LibraryPtr library;
+
+                size_t lastQueryHash;
         };
     }
 }

src/musikbox/cursespp/ListWindow.cpp

@@ -152,6 +152,15 @@ void ListWindow::OnAdapterChanged() {
     this->Repaint();
 }
 
+void ListWindow::OnSizeChanged() {
+    ScrollableWindow::OnSizeChanged();
+
+    this->GetScrollAdapter().DrawPage(
+        this->GetContent(),
+        this->selectedIndex,
+        &this->GetScrollPosition());
+}
+
 IScrollAdapter::ScrollPosition& ListWindow::GetScrollPosition() {
     return this->scrollPosition;
 }

src/musikbox/cursespp/ListWindow.h

@@ -30,6 +30,7 @@ namespace cursespp {
             virtual void OnAdapterChanged();
             virtual void OnSelectionChanged(size_t newIndex, size_t oldIndex);
             virtual void OnInvalidated();
+            virtual void OnSizeChanged();
 
             virtual IScrollAdapter::ScrollPosition& GetScrollPosition();
 

src/musikbox/cursespp/ScrollableWindow.cpp

@@ -29,7 +29,13 @@ ScrollableWindow::~ScrollableWindow() {
 
 void ScrollableWindow::OnSizeChanged() {
     Window::OnSizeChanged();
-    GetScrollAdapter().SetDisplaySize(GetContentWidth(), GetContentHeight());
+
+    IScrollAdapter& adapter = this->GetScrollAdapter();
+    ScrollPos& pos = this->GetScrollPosition();
+    
+    adapter.SetDisplaySize(
+        this->GetContentWidth(), 
+        this->GetContentHeight());
 }
 
 ScrollPos& ScrollableWindow::GetScrollPosition() {

src/musikbox/musikbox.vcxproj

@@ -156,6 +156,7 @@
     <ClInclude Include="app\layout\LibraryLayout.h" />
     <ClInclude Include="app\layout\MainLayout.h" />
     <ClInclude Include="app\query\CategoryListViewQuery.h" />
+    <ClInclude Include="app\query\TrackListQueryBase.h" />
     <ClInclude Include="app\query\SingleTrackQuery.h" />
     <ClInclude Include="app\query\TrackListViewQuery.h" />
     <ClInclude Include="app\service\PlaybackService.h" />

src/musikbox/musikbox.vcxproj.filters

@@ -231,6 +231,9 @@
     <ClInclude Include="app\window\EntryWithHeader.h">
       <Filter>app\window</Filter>
     </ClInclude>
+    <ClInclude Include="app\query\TrackListQueryBase.h">
+      <Filter>app\query</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <Filter Include="cursespp">