show cursor & proper reset on load

main.cpp

@@ -210,6 +210,8 @@ public:
     }
     
     void model_changed() {
+        pattern_view->reset();
+        song_view->reset();
         pattern_view->set_song_event(model.song.end());
         song_view->set_loop(model.loop);
         update_measures();

patternview.cpp

@@ -1109,6 +1109,10 @@ void PatternView::set_cursor(const PatternCursor &new_cursor, bool select/*=fals
     update_navigation_status();
 }
 
+void PatternView::reset() {
+    song_event = model->song.end();
+}
+
 void PatternView::show_cursor(const PatternCursor &cur, bool page_jump/*=false*/) {
     if (hadjustment) {
         int channel = cur.get_channel();

patternview.hpp

@@ -302,7 +302,7 @@ public:
     void cycle_block_selection();
     
     void move_frames(int step, bool all_channels=false);
-    
+    void reset();
 
     type_play_event_request signal_play_event_request();
     type_return_request signal_return_request();

songview.cpp

@@ -665,6 +665,8 @@ void SongView::do_move(int ofs_frame, int ofs_track) {
         selection = new_selection;
         invalidate_selection();    
     }    
+    
+    show_selection();    
 }
 
 void SongView::apply_move() {
@@ -687,6 +689,7 @@ void SongView::do_resize(int ofs_frame) {
     }
     
     invalidate();
+    show_selection();
 }
 
 void SongView::apply_resize() {
@@ -721,6 +724,7 @@ void SongView::select_first(bool increment) {
     if (!increment)
         clear_selection();
     select_event(model->song.begin());
+    show_selection();
 }
 
 void SongView::select_last(bool increment) {
@@ -731,6 +735,12 @@ void SongView::select_last(bool increment) {
     if (!increment)
         clear_selection();
     select_event(iter);
+    show_selection();
+}
+
+void SongView::reset() {
+    selection.clear();
+    invalidate();
 }
 
 Song::iterator SongView::get_left_event(Song::iterator start) {
@@ -815,6 +825,8 @@ void SongView::navigate(int dir_x, int dir_y, bool increment) {
             clear_selection();
         select_event(iter);
     }
+    
+    show_selection();
 }
 
 bool SongView::get_selection_range(int &frame_begin, int &frame_end,
@@ -987,6 +999,21 @@ void SongView::on_size_allocate(Gtk::Allocation& allocation) {
     }
 }
 
+void SongView::show_selection() {
+    int f0,f1,t0,t1;
+    if (!get_selection_range(f0,f1,t0,t1))
+        return;
+    int step = model->get_frames_per_bar()*4;
+    if (hadjustment) {
+        int value = hadjustment->get_value();
+        int page_size = hadjustment->get_page_size();
+        if (f0 < value)
+            hadjustment->clamp_page(f0-step,f1);
+        else if (f1 >= (value+page_size))
+            hadjustment->clamp_page(f0,f1+step);
+    }    
+}
+
 int absmod(int x, int m) {
     return (x >= 0)?(x%m):((m-x)%m);
 }

songview.hpp

@@ -135,6 +135,8 @@ public:
     void set_loop_begin();
     void set_loop_end();
     
+    void reset();
+    
     type_pattern_edit_request signal_pattern_edit_request();
     type_context_menu signal_context_menu();
     type_loop_changed signal_loop_changed();
@@ -177,6 +179,8 @@ protected:
     
     void clone_selection(bool references=false);
     void join_selection();
+    
+    void show_selection();
 
     // zoomlevel (0=1:1, 1=1:2, 2=1:4, etc.)
     int zoomlevel;