Make the cover grid customizable

src/calibre/gui2/__init__.py

@@ -111,6 +111,10 @@ defs['tags_browser_category_icons'] = {}
 defs['cover_browser_reflections'] = True
 defs['extra_row_spacing'] = 0
 defs['refresh_book_list_on_bulk_edit'] = True
+defs['cover_grid_width'] = 0
+defs['cover_grid_height'] = 0
+defs['cover_grid_color'] = (80, 80, 80)
+defs['cover_grid_cache_size'] = 200
 del defs
 # }}}
 

src/calibre/gui2/library/alternate_views.py

@@ -20,8 +20,11 @@ from PyQt4.Qt import (
     QUrl, QDrag, QPoint, QPainter, QRect)
 
 from calibre import fit_image
+from calibre.gui2 import gprefs
 from calibre.utils.config import prefs
 
+CM_TO_INCH = 0.393701
+
 # Drag 'n Drop {{{
 def dragMoveEvent(self, event):
     event.acceptProposedAction()
@@ -305,15 +308,39 @@ class CoverCache(dict):
     def __hash__(self):
         return id(self)
 
+    def set_limit(self, limit):
+        with self.lock:
+            self.limit = limit
+            if len(self.items) > self.limit:
+                extra = len(self.items) - self.limit
+                remove = tuple(self.iterkeys())[:extra]
+                for k in remove:
+                    del self.items[k]
+
 class CoverDelegate(QStyledItemDelegate):
 
-    def __init__(self, parent, width, height):
+    def __init__(self, parent):
         super(CoverDelegate, self).__init__(parent)
+        self.set_dimensions()
+        self.cover_cache = CoverCache(limit=gprefs['cover_grid_cache_size'])
+        self.render_queue = Queue()
+
+    def set_dimensions(self):
+        width = self.original_width = gprefs['cover_grid_width']
+        height = self.original_height = gprefs['cover_grid_height']
+
+        if height < 0.1:
+            height = max(185, QApplication.instance().desktop().availableGeometry(self.parent()).height() / 5.0)
+        else:
+            height *= self.parent().logicalDpiY() * CM_TO_INCH
+
+        if width < 0.1:
+            width = 0.75 * height
+        else:
+            width *= self.parent().logicalDpiX() * CM_TO_INCH
         self.cover_size = QSize(width, height)
         self.item_size = self.cover_size + QSize(8, 8)
         self.spacing = max(10, min(50, int(0.1 * width)))
-        self.cover_cache = CoverCache()
-        self.render_queue = Queue()
 
     def sizeHint(self, option, index):
         return self.item_size
@@ -366,11 +393,7 @@ class GridView(QListView):
     def __init__(self, parent):
         QListView.__init__(self, parent)
         setup_dnd_interface(self)
-        pal = QPalette(self.palette())
-        r = g = b = 0x50
-        pal.setColor(pal.Base, QColor(r, g, b))
-        pal.setColor(pal.Text, QColor(Qt.white if (r + g + b)/3.0 < 128 else Qt.black))
-        self.setPalette(pal)
+        self.set_color()
         self.setUniformItemSizes(True)
         self.setWrapping(True)
         self.setFlow(self.LeftToRight)
@@ -380,7 +403,7 @@ class GridView(QListView):
         self.setResizeMode(self.Adjust)
         self.setSelectionMode(self.ExtendedSelection)
         self.setVerticalScrollMode(self.ScrollPerPixel)
-        self.delegate = CoverDelegate(self, 135, 180)
+        self.delegate = CoverDelegate(self)
         self.setItemDelegate(self.delegate)
         self.setSpacing(self.delegate.spacing)
         self.ignore_render_requests = Event()
@@ -390,6 +413,21 @@ class GridView(QListView):
         self.gui = parent
         self.context_menu = None
 
+    def set_color(self):
+        r, g, b = gprefs['cover_grid_color']
+        pal = QPalette()
+        pal.setColor(pal.Base, QColor(r, g, b))
+        pal.setColor(pal.Text, QColor(Qt.white if (r + g + b)/3.0 < 128 else Qt.black))
+        self.setPalette(pal)
+
+    def refresh_settings(self):
+        if gprefs['cover_grid_width'] != self.delegate.original_width or gprefs['cover_grid_height'] != self.delegate.original_height:
+            self.delegate.set_dimensions()
+            self.setSpacing(self.delegate.spacing)
+            self.delegate.cover_cache.clear()
+        self.set_color()
+        self.delegate.cover_cache.set_limit(gprefs['cover_grid_cache_size'])
+
     def shown(self):
         if self.render_thread is None:
             self.render_thread = Thread(target=self.render_covers)

src/calibre/gui2/preferences/look_feel.py

@@ -5,8 +5,8 @@ __license__   = 'GPL v3'
 __copyright__ = '2010, Kovid Goyal <kovid@kovidgoyal.net>'
 __docformat__ = 'restructuredtext en'
 
-from PyQt4.Qt import (QApplication, QFont, QFontInfo, QFontDialog,
-        QAbstractListModel, Qt, QIcon, QKeySequence)
+from PyQt4.Qt import (QApplication, QFont, QFontInfo, QFontDialog, QColorDialog,
+        QAbstractListModel, Qt, QIcon, QKeySequence, QPalette, QColor)
 
 from calibre.gui2.preferences import ConfigWidgetBase, test_widget, CommaSeparatedList
 from calibre.gui2.preferences.look_feel_ui import Ui_Form
@@ -110,6 +110,9 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         r('tag_browser_old_look', gprefs, restart_required=True)
         r('bd_show_cover', gprefs)
         r('bd_overlay_cover_size', gprefs)
+        r('cover_grid_width', gprefs)
+        r('cover_grid_height', gprefs)
+        r('cover_grid_cache_size', gprefs)
 
         r('cover_flow_queue_length', config, restart_required=True)
         r('cover_browser_reflections', gprefs)
@@ -123,7 +126,7 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         lang = get_lang()
         if lang is None or lang not in available_translations():
             lang = 'en'
-        items = [(l, get_esc_lang(l)) for l in available_translations() \
+        items = [(l, get_esc_lang(l)) for l in available_translations()
                  if l != lang]
         if lang != 'en':
             items.append(('en', get_esc_lang('en')))
@@ -170,7 +173,6 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         r('categories_using_hierarchy', db.prefs, setting=CommaSeparatedList,
           choices=sorted(list(choices), key=sort_key))
 
-
         self.current_font = self.initial_font = None
         self.change_font_button.clicked.connect(self.change_font)
 
@@ -197,6 +199,7 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         keys = [unicode(x.toString(QKeySequence.NativeText)) for x in keys]
         self.fs_help_msg.setText(unicode(self.fs_help_msg.text())%(
             _(' or ').join(keys)))
+        self.cover_grid_color_button.clicked.connect(self.change_cover_grid_color)
 
     def initialize(self):
         ConfigWidgetBase.initialize(self)
@@ -215,6 +218,12 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
             mi=None
         self.edit_rules.initialize(db.field_metadata, db.prefs, mi, 'column_color_rules')
         self.icon_rules.initialize(db.field_metadata, db.prefs, mi, 'column_icon_rules')
+        self.set_cg_color(gprefs['cover_grid_color'])
+
+    def set_cg_color(self, val):
+        pal = QPalette()
+        pal.setColor(QPalette.Window, QColor(*val))
+        self.cover_grid_color_label.setPalette(pal)
 
     def restore_defaults(self):
         ConfigWidgetBase.restore_defaults(self)
@@ -227,6 +236,15 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         self.edit_rules.clear()
         self.icon_rules.clear()
         self.changed_signal.emit()
+        self.set_cg_color(gprefs.defaults['cover_grid_color'])
+
+    def change_cover_grid_color(self):
+        col = QColorDialog.getColor(self.cover_grid_color_label.palette().color(QPalette.Window),
+                              self.gui, _('Choose background color for cover grid'))
+        if col.isValid():
+            col = tuple(col.getRgb())[:3]
+            self.set_cg_color(col)
+            self.changed_signal.emit()
 
     def build_font_obj(self):
         font_info = self.current_font
@@ -286,6 +304,7 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         self.display_model.commit()
         self.edit_rules.commit(self.gui.current_db.prefs)
         self.icon_rules.commit(self.gui.current_db.prefs)
+        gprefs['cover_grid_color'] = tuple(self.cover_grid_color_label.palette().color(QPalette.Window).getRgb())[:3]
         return rr
 
     def refresh_gui(self, gui):
@@ -296,9 +315,11 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         if hasattr(gui.cover_flow, 'setShowReflections'):
             gui.cover_flow.setShowReflections(gprefs['cover_browser_reflections'])
         gui.library_view.refresh_row_sizing()
+        gui.grid_view.refresh_settings()
 
 if __name__ == '__main__':
     from calibre.gui2 import Application
     app = Application([])
     test_widget('Interface', 'Look & Feel')
 
+

src/calibre/gui2/preferences/look_feel.ui

@@ -223,6 +223,184 @@
        </item>
       </layout>
      </widget>
+     <widget class="QWidget" name="tab_5">
+      <attribute name="icon">
+       <iconset resource="../../../../resources/images.qrc">
+        <normaloff>:/images/grid.png</normaloff>:/images/grid.png</iconset>
+      </attribute>
+      <attribute name="title">
+       <string>Cover Grid</string>
+      </attribute>
+      <layout class="QVBoxLayout" name="verticalLayout">
+       <item>
+        <layout class="QHBoxLayout" name="horizontalLayout_2">
+         <item>
+          <widget class="QLabel" name="label_11">
+           <property name="text">
+            <string>Cover &amp;Width: </string>
+           </property>
+           <property name="buddy">
+            <cstring>opt_cover_grid_width</cstring>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QDoubleSpinBox" name="opt_cover_grid_width">
+           <property name="toolTip">
+            <string>The width of displayed covers</string>
+           </property>
+           <property name="suffix">
+            <string> cm</string>
+           </property>
+           <property name="decimals">
+            <number>1</number>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLabel" name="label_12">
+           <property name="text">
+            <string>Cover &amp;Height: </string>
+           </property>
+           <property name="buddy">
+            <cstring>opt_cover_grid_height</cstring>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QDoubleSpinBox" name="opt_cover_grid_height">
+           <property name="toolTip">
+            <string>The height of displayed covers</string>
+           </property>
+           <property name="suffix">
+            <string> cm</string>
+           </property>
+           <property name="decimals">
+            <number>1</number>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLabel" name="label_13">
+           <property name="text">
+            <string>A value of zero means set automatically based on screen size</string>
+           </property>
+           <property name="wordWrap">
+            <bool>true</bool>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <spacer name="horizontalSpacer">
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+           <property name="sizeHint" stdset="0">
+            <size>
+             <width>40</width>
+             <height>20</height>
+            </size>
+           </property>
+          </spacer>
+         </item>
+        </layout>
+       </item>
+       <item>
+        <layout class="QHBoxLayout" name="horizontalLayout_3">
+         <item>
+          <widget class="QLabel" name="label_14">
+           <property name="text">
+            <string>Background color for the cover grid:</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLabel" name="cover_grid_color_label">
+           <property name="minimumSize">
+            <size>
+             <width>50</width>
+             <height>50</height>
+            </size>
+           </property>
+           <property name="autoFillBackground">
+            <bool>true</bool>
+           </property>
+           <property name="text">
+            <string/>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QPushButton" name="cover_grid_color_button">
+           <property name="text">
+            <string>Change &amp;color</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <spacer name="horizontalSpacer_2">
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+           <property name="sizeHint" stdset="0">
+            <size>
+             <width>40</width>
+             <height>20</height>
+            </size>
+           </property>
+          </spacer>
+         </item>
+        </layout>
+       </item>
+       <item>
+        <layout class="QHBoxLayout" name="horizontalLayout_4">
+         <item>
+          <widget class="QLabel" name="label_15">
+           <property name="text">
+            <string>Number of covers to cache in &amp;memory:</string>
+           </property>
+           <property name="buddy">
+            <cstring>opt_cover_grid_cache_size</cstring>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QSpinBox" name="opt_cover_grid_cache_size">
+           <property name="maximum">
+            <number>3000</number>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <spacer name="horizontalSpacer_3">
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+           <property name="sizeHint" stdset="0">
+            <size>
+             <width>40</width>
+             <height>20</height>
+            </size>
+           </property>
+          </spacer>
+         </item>
+        </layout>
+       </item>
+       <item>
+        <spacer name="verticalSpacer">
+         <property name="orientation">
+          <enum>Qt::Vertical</enum>
+         </property>
+         <property name="sizeHint" stdset="0">
+          <size>
+           <width>20</width>
+           <height>355</height>
+          </size>
+         </property>
+        </spacer>
+       </item>
+      </layout>
+     </widget>
      <widget class="QWidget" name="tab_4">
       <attribute name="icon">
        <iconset resource="../../../../resources/images.qrc">