keep pos consistent in auto_zoom mode

handyview/canvas.py

@@ -219,6 +219,7 @@ def compare_folders(self, step):
     def show_image(self, init=False):
         interval_mode = (self.db.get_folder_len() == 1)
         for idx, qscene in enumerate(self.qscenes):
+            qview = self.qviews[idx]
             if interval_mode:
                 pidx = self.db.pidx + idx
                 img_path = self.db.get_path(pidx=pidx)[0]
@@ -249,7 +250,7 @@ def show_image(self, init=False):
 
             # --------------- auto zoom scale ratio -------------------
             if self.target_zoom_width > 0:
-                self.qviews[idx].set_zoom(self.target_zoom_width / qimg.width())
+                qview.set_zoom(self.target_zoom_width / qimg.width())
             # --------------- end of auto zoom scale ratio -------------------
 
             # shown text
@@ -285,12 +286,12 @@ def get_parent_dir(path, levels=1):
                     shown_text.append(f'md5: {md5}')
                     shown_text.append(f'phash: {phash}')
 
-            if self.qviews[idx].hasFocus():
+            if qview.hasFocus():
                 color = 'red'
             else:
                 color = 'green'
-            self.qviews[idx].set_shown_text(shown_text, color)
-            # self.qviews[idx].viewport().update()
+            qview.set_shown_text(shown_text, color)
+            # qview.viewport().update()
             qpixmap = QPixmap.fromImage(qimg)
 
             # draw border
@@ -307,6 +308,9 @@ def get_parent_dir(path, levels=1):
             qscene.set_width_height(width, height)
             # put image always in the center of a QGraphicsView
             qscene.setSceneRect(0, 0, width, height)
+            # set the scroll bar position, so that it can keep the same position in auto_zoom
+            qview.verticalScrollBar().setSliderPosition(qview.vertical_scroll_value)
+            qview.horizontalScrollBar().setSliderPosition(qview.horizontal_scroll_value)
 
         # set include and exclude name info
         if self.num_view == 1:

handyview/db.py

@@ -1,11 +1,15 @@
 import hashlib
 import imagehash
 import os
-from PIL import Image
+from PIL import Image, ImageFile
 
 from handyview.utils import FORMATS, ROOT_DIR, get_img_list, scandir, sizeof_fmt
 from handyview.widgets import show_msg
 
+# for loading large image file
+ImageFile.LOAD_TRUNCATED_IMAGES = True
+Image.MAX_IMAGE_PIXELS = None
+
 
 class HVDB():
     """HandyView database.

handyview/handyviewer.py

@@ -279,7 +279,7 @@ def open_history(self):
     # slots: refresh and index
     # ---------------------------------------
     def refresh_img_list(self):
-        # should be used in Main Cavans
+        # should be used in Main Canvas
         if self.canvas_type != 'main':
             self.switch_main_canvas()
 

handyview/view_scene.py

@@ -29,6 +29,9 @@ def __init__(self, scene, parent=None, show_info=True):
         self.rotate = 0
         self.shown_text = None
 
+        self.vertical_scroll_value = 0
+        self.horizontal_scroll_value = 0
+
         self.font = QFont('times', 15)
         font_metrics = QFontMetrics(self.font)
         self.text_height = font_metrics.height()
@@ -116,6 +119,8 @@ def mouseReleaseEvent(self, event):
             self.rubber_band_changable = False
         else:
             QGraphicsView.mouseReleaseEvent(self, event)
+            self.vertical_scroll_value = self.verticalScrollBar().value()
+            self.horizontal_scroll_value = self.horizontalScrollBar().value()
 
     def wheelEvent(self, event):
         mouse = event.angleDelta().y() / 120