Add touch event management to text files backend

Signed-off-by: Gonzalo Odiard <gonzalo@laptop.org>

1 files changed, 14 insertions, 0 deletions

diff --git a/textadapter.py b/textadapter.py
index fe17d32..23ff755 100644
--- a/textadapter.py
+++ b/textadapter.py
@@ -2,6 +2,7 @@ import os
 import zipfile
 import logging
 from gi.repository import Gtk
+from gi.repository import Gdk
 from gi.repository import Pango
 from gi.repository import GObject
 import threading
@@ -45,6 +46,10 @@ class TextViewer(GObject.GObject):
         self.connect('selection-changed',
                             activity._view_selection_changed_cb)
 
+        self.textview.set_events(self.textview.get_events() | \
+                Gdk.EventMask.TOUCH_MASK)
+        self.textview.connect('event', self.__touch_event_cb)
+
         activity._scrolled.add(self.textview)
         self.textview.show()
         activity._scrolled.show()
@@ -126,6 +131,15 @@ class TextViewer(GObject.GObject):
         textbuffer.set_text(label_text)
         self._prepare_text_to_speech(label_text)
 
+    def __touch_event_cb(self, widget, event):
+        if event.type == Gdk.EventType.TOUCH_BEGIN:
+            x = event.touch.x
+            view_width = widget.get_allocation().width
+            if x > view_width * 3 / 4:
+                self.scroll(Gtk.ScrollType.PAGE_FORWARD, False)
+            elif x < view_width * 1 / 4:
+                self.scroll(Gtk.ScrollType.PAGE_BACKWARD, False)
+
     def can_highlight(self):
         return True