[Reader] Adjust image size when window is resized

mangascan/reader.py

@@ -9,6 +9,9 @@ from gi.repository.GdkPixbuf import Pixbuf
 
 
 class Reader():
+    pixbuf = None
+    size = None
+
     def __init__(self, window):
         self.window = window
         self.builder = window.builder
@@ -17,6 +20,7 @@ class Reader():
         self.scrolledwindow = self.viewport.get_parent()
         self.image = Gtk.Image()
 
+        self.window.connect('check-resize', self.on_resize)
         self.scrolledwindow.connect('button-press-event', self.on_button_press)
 
     def clear(self):
@@ -28,14 +32,11 @@ class Reader():
 
         chapter.manga.update(dict(last_read=datetime.datetime.now()))
 
-        self.render_page(self.chapter.last_page_read_index)
         self.render_page(self.chapter.last_page_read_index or 0)
 
     def on_button_press(self, widget, event):
         if event.type == Gdk.EventType.BUTTON_PRESS and event.button == 1:
-            sw_width = self.scrolledwindow.get_allocated_width()
-
-            if event.x > sw_width / 2:
+            if event.x > self.size.width / 2:
                 index = self.page_index - 1
             else:
                 index = self.page_index + 1
@@ -46,40 +47,33 @@ class Reader():
                 # TODO: next or prev chapter
                 print('BEGIN or END')
 
+    def on_resize(self, window):
+        size = self.viewport.get_allocated_size()[0]
+
+        if self.size and (size.width != self.size.width or size.height != self.size.height):
+            self.size = size
+            self.set_page_image_from_pixbuf()
+
     def render_page(self, index):
         def get_page_image_path():
             self.chapter.update()
             page_path = self.chapter.get_page(self.page_index)
 
-            GLib.idle_add(set_page_image, page_path)
+            GLib.idle_add(show_page_image, page_path)
 
-        def set_page_image(page_path):
+        def show_page_image(page_path):
             if page_path is None:
                 # TODO: Display not found page
                 return False
 
-            pixbuf = Pixbuf.new_from_file(page_path)
-
-            sw_width = self.scrolledwindow.get_allocated_width()
-            width = pixbuf.get_width()
-            height = pixbuf.get_height()
-
-            pixbuf = pixbuf.scale_simple(
-                sw_width,
-                height / (width / sw_width),
-                InterpType.BILINEAR
-            )
-            self.image.set_from_pixbuf(pixbuf)
+            self.pixbuf = Pixbuf.new_from_file(page_path)
+            self.size = self.viewport.get_allocated_size()[0]
+            self.set_page_image_from_pixbuf()
 
             self.clear()
             self.viewport.add(self.image)
             self.image.show()
 
-            # if width > sw_width:
-            #     vadj.set_value((width - sw_width) / 2)
-            # if height > sw_height:
-            #     hadj.set_value((height - sw_height) / 2)
-
             return False
 
         self.page_index = index
@@ -91,6 +85,23 @@ class Reader():
         thread.daemon = True
         thread.start()
 
+    def set_page_image_from_pixbuf(self):
+        width = self.pixbuf.get_width()
+        height = self.pixbuf.get_height()
+
+        # Adjust image on width
+        pixbuf = self.pixbuf.scale_simple(
+            self.size.width,
+            height / (width / self.size.width),
+            InterpType.BILINEAR
+        )
+        self.image.set_from_pixbuf(pixbuf)
+
+        # if width > self.size.width:
+        #     vadj.set_value((width - self.size.width) / 2)
+        # if height > self.size.height:
+        #     hadj.set_value((height - self.size.height) / 2)
+
     def show_spinner(self):
         self.clear()
         self.viewport.add(self.builder.get_object('spinner_box'))