Added tablet mode

- Added tablet mode: when music score is maximized
    - Right click on score panel toggles full screen mode (Shift-Alt-F)
    - Left click on right quarter of the screen turns to next page
    - Left click on left quarter of the screen turns to previous page

Author: jwdj

Diff for: CHANGES

@@ -601,4 +601,8 @@ different panes. Tie/untie option added for notes. Broken rhythm
 
 1.3.8.5
 - Export MIDI no longer includes the markers which are used for follow score
-- Double click on score panel toggles full screen mode (Shift-Alt-F)
+- Added tablet mode: when music score is maximized
+    - Right click on score panel toggles full screen mode (Shift-Alt-F)
+    - Left click on right quarter of the screen turns to next page
+    - Left click on left quarter of the screen turns to previous page
+- Fixed: follow score stopped working when screen in portrait mode

Diff for: easy_abc.py

@@ -3935,6 +3935,7 @@ def __init__(self, parent, ID, app_dir, settings, options):
         self.find_data.SetFlags(wx.FR_DOWN)
         self.execmessage_time = datetime.now() # 1.3.6 [SS] 2014-12-11
         self.is_fullscreen = False
+        self.score_is_maximized = False
 
         self.load_settings()
         settings = self.settings
@@ -4045,6 +4046,8 @@ def __init__(self, parent, ID, app_dir, settings, options):
         #self.manager.AddPane(self.error_msg, self.error_pane)
         self.manager.AddPane(self.abc_assist_panel, self.assist_pane)
         self.manager.Bind(aui.EVT_AUI_PANE_CLOSE, self.__onPaneClose)
+        self.manager.Bind(aui.EVT_AUI_PANE_MAXIMIZE, self.__onPaneMaximize)
+        self.manager.Bind(aui.EVT_AUI_PANE_RESTORE, self.__onPaneRestore)
 
         self.manager.Update()
 
@@ -4089,6 +4092,9 @@ def __init__(self, parent, ID, app_dir, settings, options):
         self.editor.CmdKeyAssign(ord('+'), stc.STC_SCMOD_CTRL, stc.STC_CMD_ZOOMIN)
         self.editor.CmdKeyAssign(ord('-'), stc.STC_SCMOD_CTRL, stc.STC_CMD_ZOOMOUT)
         self.music_pane.Bind(wx.EVT_LEFT_DCLICK, self.OnMusicPaneDoubleClick)
+        self.music_pane.Bind(wx.EVT_LEFT_DOWN, self.OnMusicPaneClick)
+        self.music_pane.Bind(wx.EVT_RIGHT_DOWN, self.OnRightClickMusicPane)
+
         #self.music_pane.Bind(wx.EVT_KEY_DOWN, self.OnMusicPaneKeyDown)
 
         self.load_and_apply_settings(load_window_size_pos=True)
@@ -5572,8 +5578,29 @@ def OnMoveTuneDown(self, evt):
             self.tune_list.DeselectAll()
             self.MoveTune(selected_index, selected_index + 1)
 
+    def OnMusicPaneClick(self, evt):
+        if self.score_is_maximized:
+            width, height = self.music_pane.Size
+            x, y = evt.Position
+            threshold = width / 4
+            new_page = -1
+
+            if x < threshold:
+                new_page = self.current_page_index - 1
+            elif x > (width - threshold):
+                new_page = self.current_page_index + 1
+
+            if 0 <= new_page < self.current_svg_tune.page_count and new_page != self.current_page_index:
+                self.select_page(new_page)
+                return
+
+        evt.Skip()
+
+    def OnRightClickMusicPane(self, evt):
+        if self.score_is_maximized:
+            self.toggle_fullscreen(evt)
+
     def OnMusicPaneDoubleClick(self, evt):
-        self.toggle_fullscreen(evt)
         self.editor.SetFocus()
 
     def toggle_fullscreen(self, evt):
@@ -5724,6 +5751,14 @@ def __onPaneClose(self, evt):
             self.search_files_panel.focus_find_what()
             self.search_files_panel.clear_results()
 
+    def __onPaneMaximize(self, evt):
+        if evt.pane.window == self.music_pane:
+            self.score_is_maximized = True
+
+    def __onPaneRestore(self, evt):
+        if evt.pane.window == self.music_pane:
+            self.score_is_maximized = False
+
     # def OnToolDynamics(self, evt):
     #    try: self.toolbar.PopupMenu(self.popup_dynamics)
     #    except wx._core.PyAssertionError: pass