Fix scrolling and alignment in PageView.

pixelocr/gui/pageview.py

@@ -15,6 +15,7 @@
 
 
 from PyQt4.QtCore import (
+    Qt,
     signal,
     slot,
 )
@@ -60,14 +61,19 @@ class PageScene(QGraphicsScene):
             self.removeItem(item)
         self.page = page
         self.pageItem = self.addPage(page)
-        self.pageItem.ensureVisible(0, 0, 1, 1)
         self.highlightBaselines()
 
         shadow = QGraphicsDropShadowEffect()
         shadow.setBlurRadius(20)
         shadow.setOffset(2, 2)
         self.pageItem.setGraphicsEffect(shadow)
-        self.sceneRectChanged.emit(self.sceneRect())
+
+        rect = self.pageItem.boundingRect()
+        rect.setLeft(rect.left() - 10)
+        rect.setTop(rect.top() - 10)
+        self.setSceneRect(rect)
+        self.pageItem.ensureVisible(0, 0, 1, 1)
+
         self.pageItemChanged.emit(self.pageItem)
 
     def highlightBaselines(self):
@@ -103,3 +109,4 @@ class PageView(QGraphicsView):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         self.setFrameShape(self.NoFrame)
+        self.setAlignment(Qt.AlignTop | Qt.AlignLeft)