Enforce a maximum size for cover display widgets.

src/libprs500/__init__.py

@@ -20,6 +20,7 @@ __appname__   = 'libprs500'
 
 import sys, os, logging, mechanize, locale, cStringIO
 from gettext import GNUTranslations
+from math import floor
 
 iswindows = 'win32' in sys.platform.lower()
 isosx     = 'darwin' in sys.platform.lower()
@@ -84,6 +85,28 @@ def browser():
     opener.addheaders = [('User-agent', 'Mozilla/5.0 (X11; U; i686 Linux; en_US; rv:1.8.0.4) Gecko/20060508 Firefox/1.5.0.4')]
     return opener
 
+def fit_image(width, height, pwidth, pheight):
+    '''
+    Fit image in box of width pwidth and height pheight. 
+    @param width: Width of image
+    @param height: Height of image
+    @param pwidth: Width of box 
+    @param pheight: Height of box
+    @return: scaled, new_width, new_height. scaled is True iff new_widdth and/or new_height is different from width or height.  
+    '''
+    scaled = height > pheight or width > pwidth
+    if height > pheight:
+        corrf = pheight/float(height)
+        width, height = floor(corrf*width), pheight                        
+    if width > pwidth:
+        corrf = pwidth/float(width)
+        width, height = pwidth, floor(corrf*height)
+    if height > pheight:
+        corrf = pheight/float(height)
+        width, height = floor(corrf*width), pheight
+                            
+    return scaled, int(width), int(height)      
+
 def set_translator():
     # To test different translations invoke as
     # LC_ALL=de_DE.utf8 program

src/libprs500/ebooks/lrf/html/convert_from.py

@@ -42,7 +42,7 @@ from libprs500.ebooks.lrf import Book
 from libprs500.ebooks.lrf import option_parser as lrf_option_parser
 from libprs500.ebooks import ConversionError
 from libprs500.ebooks.lrf.html.table import Table 
-from libprs500 import filename_to_utf8,  setup_cli_handlers, __appname__
+from libprs500 import filename_to_utf8,  setup_cli_handlers, __appname__, fit_image
 from libprs500.ptempfile import PersistentTemporaryFile
 from libprs500.ebooks.metadata.opf import OPFReader
 from libprs500.devices.interface import Device
@@ -64,19 +64,7 @@ def munge_paths(basepath, url):
         path = os.path.join(os.path.dirname(basepath), path)
     return os.path.normpath(path), fragment
 
-def fit_image(width, height, pwidth, pheight):
-    scaled = height > pheight or width > pwidth
-    if height > pheight:
-        corrf = pheight/float(height)
-        width, height = floor(corrf*width), pheight                        
-    if width > pwidth:
-        corrf = pwidth/float(width)
-        width, height = pwidth, floor(corrf*height)
-    if height > pheight:
-        corrf = pheight/float(height)
-        width, height = floor(corrf*width), pheight
                               
-    return scaled, int(width), int(height)                                    
         
 
 class HTMLConverter(object):

src/libprs500/gui2/status.py

@@ -17,6 +17,7 @@ import textwrap
 from PyQt4.QtGui import QStatusBar, QMovie, QLabel, QFrame, QHBoxLayout, QPixmap, \
                         QVBoxLayout, QSizePolicy
 from PyQt4.QtCore import Qt, QSize
+from libprs500 import fit_image
 from libprs500.gui2 import qstring_to_unicode
 
 class BookInfoDisplay(QFrame):
@@ -29,13 +30,17 @@ class BookInfoDisplay(QFrame):
                                                             self.__class__.HEIGHT,
                                                             Qt.IgnoreAspectRatio,
                                                             Qt.SmoothTransformation)
-            self.setPixmap(self.default_pixmap)
-            self.setMaximumHeight(self.HEIGHT)
-            self.setMaximumWidth(self.WIDTH)
             self.setScaledContents(True)
+            self.setPixmap(self.default_pixmap)
+            
         
         def setPixmap(self, pixmap):
+            width, height = fit_image(pixmap.width(), pixmap.height(),
+                                              self.WIDTH, self.HEIGHT)[1:]
+            self.setMaximumHeight(height)
+            self.setMaximumWidth(width)
             QLabel.setPixmap(self, pixmap)
+             
             aspect_ratio = pixmap.width()/float(pixmap.height())
             self.setMaximumWidth(int(aspect_ratio*self.HEIGHT))
         

src/libprs500/gui2/widgets.py

@@ -19,13 +19,18 @@ from PyQt4.QtGui import QListView, QIcon, QFont, QLabel
 from PyQt4.QtCore import QAbstractListModel, QVariant, Qt, QSize, SIGNAL, QObject
 
 from libprs500.gui2 import human_readable, NONE
+from libprs500 import fit_image
 
 class ImageView(QLabel):
     
+    MAX_WIDTH  = 400
+    MAX_HEIGHT = 300
+    
     def setPixmap(self, pixmap):
         QLabel.setPixmap(self, pixmap)
-        self.setMaximumWidth(pixmap.width())
+        width, height = fit_image(pixmap.width(), pixmap.height(), self.MAX_WIDTH, self.MAX_HEIGHT)[1:]
-        self.setMaximumHeight(pixmap.height()) 
+        self.setMaximumWidth(width)
+        self.setMaximumHeight(height) 
 
 class LocationModel(QAbstractListModel):
     def __init__(self, parent):