Add Gallery functions

Added update and remove gallery funtions.

Author: nemani

uiplib/gui/gallery.py

@@ -55,10 +55,31 @@ def show_image(self, image):
     def _blur_helper(self, event):
         """Helper to schedule the blur_image task."""
         if self._job:
-            self.appObj.after_cancel(self._job)
-        self._job = self.appObj.after(250, self.blur_image)
+            self.appObj.root.after_cancel(self._job)
+        self._job = self.appObj.root.after(250, self.blur_image)
 
     def blur_image(self):
         """Apply blur to the chosen image."""
         show = self.image.blur(self.slider.get())
         self.show_image(show)
+
+    def update(self):
+        """Update the gallery."""
+        appObj = self.appObj
+
+        gallery_remove(self.label)
+        gallery_remove(self.cv)
+        gallery_remove(self.slider)
+
+        if len(appObj.images) != 0:
+            self.set_image(
+                appObj.images[(appObj.index) % len(appObj.images)])
+        else:
+            self.show_error()
+
+
+def gallery_remove(object):
+    """Remove object from gallery if exists."""
+    if object:
+        object.pack_forget()
+        object = None

uiplib/gui/generalTab.py

@@ -42,12 +42,10 @@ def create_general_tab(appObj):
     appObj.progress = 0
     appObj.progressBar = None
 
-    appObj.gallery = Gallery(mainFrame, appObj.root)
+    appObj.gallery = Gallery(mainFrame, appObj)
     appObj.gallery.pack(fill=BOTH)
-    if len(appObj.images) != 0:
-        appObj.gallery.set_image(appObj.images[appObj.index])
-    else:
-        appObj.gallery.show_error()
+
+    appObj.gallery.update()
 
     # Add Play Button to start.
     playBtn = Button(