Animation

mopidy_touchscreen/graphic_utils/view_pager.py

@@ -0,0 +1,84 @@
+__author__ = 'ander'
+
+from ..screens.base_screen import BaseScreen
+import traceback
+
+
+class ViewPager:
+
+    def __init__(self, size, manager):
+        self.size = size
+        self.objets_manager = [manager.create_objects_manager(), manager.create_objects_manager(), manager.create_objects_manager()]
+        self.pos = 0
+        self.manager = manager
+        self.next = False
+        self.direction = 0
+        self.previous = False
+        self.speed = self.size[0] / 15
+        self.update = False
+        self.update_rects = []
+
+    def notify_changed(self):
+        try:
+            for i in range(0, 3, 1):
+                self.manager.set_page_values(self.objets_manager[i], i)
+            self.update = True
+        except:
+            traceback.print_exc()
+
+    def change_to_page(self, page):
+        self.direction = page
+        self.update = True
+
+    def should_update(self):
+        if self.update:
+            return BaseScreen.update_all
+        else:
+            if len(self.update_rects)>0:
+                return BaseScreen.update_partial
+            else:
+                return BaseScreen.no_update
+
+    def shift(self):
+        if self.direction == 1:
+            if -self.pos > self.size[0]:
+                self.pos = 0
+                self.direction = 0
+                aux = self.objets_manager[0]
+                self.objets_manager[0] = self.objets_manager[1]
+                self.objets_manager[1] = self.objets_manager[2]
+                self.objets_manager[2] = aux
+                self.notify_changed()
+            else:
+                self.pos -= self.speed
+            self.objets_manager[2].set_horizontal_shift(self.size[0] + self.pos)
+            self.objets_manager[1].set_horizontal_shift(self.pos)
+        elif self.direction == -1:
+            if self.pos > self.size[0]:
+                self.pos = 0
+                self.direction = 0
+                aux = self.objets_manager[2]
+                self.objets_manager[2] = self.objets_manager[1]
+                self.objets_manager[1] = self.objets_manager[0]
+                self.objets_manager[0] = aux
+                self.notify_changed()
+            else:
+                self.pos += self.speed
+            self.objets_manager[0].set_horizontal_shift(-self.size[0] + self.pos)
+            self.objets_manager[1].set_horizontal_shift(self.pos)
+
+    def render(self, screen, update_type):
+        if self.direction != 0:
+            self.shift()
+        if self.pos != 0:
+            if self.direction == 1:
+                self.objets_manager[2].render(screen)
+            elif self.direction == -1:
+                self.objets_manager[0].render(screen)
+        else:
+            self.update = False
+            self.update_rects = self.objets_manager[1].get_update_rects()
+            #if update_type == BaseScreen.update_partial:
+                #rects += self.update_rects
+
+        self.objets_manager[1].render(screen)