Edit book: Add options to change the default font families/sizes for the preview panel

src/calibre/gui2/tweak_book/__init__.py

@@ -10,21 +10,31 @@ import string
 
 from calibre.utils.config import JSONConfig
 tprefs = JSONConfig('tweak_book_gui')
+d = tprefs.defaults
 
-tprefs.defaults['editor_theme'] = None
-tprefs.defaults['editor_font_family'] = None
-tprefs.defaults['editor_font_size'] = 12
-tprefs.defaults['editor_line_wrap'] = True
-tprefs.defaults['editor_tab_stop_width'] = 2
-tprefs.defaults['preview_refresh_time'] = 2
-tprefs.defaults['choose_tweak_fmt'] = True
-tprefs.defaults['tweak_fmt_order'] = ['EPUB', 'AZW3']
-tprefs.defaults['update_metadata_from_calibre'] = True
-tprefs.defaults['nestable_dock_widgets'] = False
-tprefs.defaults['dock_top_left'] = 'horizontal'
-tprefs.defaults['dock_top_right'] = 'horizontal'
-tprefs.defaults['dock_bottom_left'] = 'horizontal'
-tprefs.defaults['dock_bottom_right'] = 'horizontal'
+d['editor_theme'] = None
+d['editor_font_family'] = None
+d['editor_font_size'] = 12
+d['editor_line_wrap'] = True
+d['editor_tab_stop_width'] = 2
+d['preview_refresh_time'] = 2
+d['choose_tweak_fmt'] = True
+d['tweak_fmt_order'] = ['EPUB', 'AZW3']
+d['update_metadata_from_calibre'] = True
+d['nestable_dock_widgets'] = False
+d['dock_top_left'] = 'horizontal'
+d['dock_top_right'] = 'horizontal'
+d['dock_bottom_left'] = 'horizontal'
+d['dock_bottom_right'] = 'horizontal'
+d['preview_serif_family'] = 'Liberation Serif'
+d['preview_sans_family'] = 'Liberation Sans'
+d['preview_mono_family'] = 'Liberation Mono'
+d['preview_standard_font_family'] = 'serif'
+d['preview_base_font_size'] = 18
+d['preview_mono_font_size'] = 14
+d['preview_minimum_font_size'] = 8
+
+del d
 
 ucase_map = {l:string.ascii_uppercase[i] for i, l in enumerate(string.ascii_lowercase)}
 def capitalize(x):

src/calibre/gui2/tweak_book/preferences.py

@@ -14,7 +14,7 @@ from itertools import product
 from PyQt4.Qt import (
     QDialog, QGridLayout, QStackedWidget, QDialogButtonBox, QListWidget,
     QListWidgetItem, QIcon, QWidget, QSize, QFormLayout, Qt, QSpinBox,
-    QCheckBox, pyqtSignal, QDoubleSpinBox, QComboBox, QLabel)
+    QCheckBox, pyqtSignal, QDoubleSpinBox, QComboBox, QLabel, QFont, QFontComboBox)
 
 from calibre.gui2.keyboard import ShortcutConfig
 from calibre.gui2.tweak_book import tprefs
@@ -220,6 +220,38 @@ class MainWindowSettings(BasicSettings):
                   ('bottom', 'left'):_('The bottom-left corner'), ('bottom', 'right'):_('The bottom-right corner')}[(v, h)]
             l.addRow(cn + ':', w)
 
+class PreviewSettings(BasicSettings):
+
+    def __init__(self, parent=None):
+        BasicSettings.__init__(self, parent)
+        self.l = l = QFormLayout(self)
+        self.setLayout(l)
+
+        def family_getter(w):
+            return unicode(w.currentFont().family())
+
+        def family_setter(w, val):
+            w.setCurrentFont(QFont(val))
+
+        families = {'serif':_('Serif text'), 'sans':_('Sans-serif text'), 'mono':_('Monospaced text')}
+        for fam, text in families.iteritems():
+            w = QFontComboBox(self)
+            self('preview_%s_family' % fam, widget=w, getter=family_getter, setter=family_setter)
+            l.addRow(_('Font family for &%s:') % text, w)
+
+        w = self.choices_widget('preview_standard_font_family', families, 'serif', 'serif')
+        l.addRow(_('&Style for standard text:'), w)
+
+        w = self('preview_base_font_size')
+        w.setMinimum(8), w.setMaximum(100), w.setSuffix(' px')
+        l.addRow(_('&Default font size:'), w)
+        w = self('preview_mono_font_size')
+        w.setMinimum(8), w.setMaximum(100), w.setSuffix(' px')
+        l.addRow(_('&Monospace font size:'), w)
+        w = self('preview_minimum_font_size')
+        w.setMinimum(4), w.setMaximum(100), w.setSuffix(' px')
+        l.addRow(_('Mi&nimum font size:'), w)
+
 class Preferences(QDialog):
 
     def __init__(self, gui, initial_panel=None):
@@ -264,10 +296,12 @@ class Preferences(QDialog):
         self.editor_panel = EditorSettings(self)
         self.integration_panel = IntegrationSettings(self)
         self.main_window_panel = MainWindowSettings(self)
+        self.preview_panel = PreviewSettings(self)
 
         for name, icon, panel in [
             (_('Main window'), 'page.png', 'main_window'),
             (_('Editor settings'), 'modified.png', 'editor'),
+            (_('Preview settings'), 'viewer.png', 'preview'),
             (_('Keyboard shortcuts'), 'keyboard-prefs.png', 'keyboard'),
             (_('Integration with calibre'), 'lt.png', 'integration'),
         ]:

src/calibre/gui2/tweak_book/preview.py

@@ -595,3 +595,14 @@ class Preview(QWidget):
             else:
                 self.stop_split()
 
+    def apply_settings(self):
+        s = self.view.page().settings()
+        s.setFontSize(s.DefaultFontSize, tprefs['preview_base_font_size'])
+        s.setFontSize(s.DefaultFixedFontSize, tprefs['preview_mono_font_size'])
+        s.setFontSize(s.MinimumLogicalFontSize, tprefs['preview_minimum_font_size'])
+        s.setFontSize(s.MinimumFontSize, tprefs['preview_minimum_font_size'])
+        sf, ssf, mf = tprefs['preview_serif_family'], tprefs['preview_sans_family'], tprefs['preview_mono_family']
+        s.setFontFamily(s.StandardFont, {'serif':sf, 'sans':ssf, 'mono':mf, None:sf}[tprefs['preview_standard_font_family']])
+        s.setFontFamily(s.SerifFont, sf)
+        s.setFontFamily(s.SansSerifFont, ssf)
+        s.setFontFamily(s.FixedFont, mf)

src/calibre/gui2/tweak_book/ui.py

@@ -233,6 +233,7 @@ class Main(MainWindow):
             p = 'dock_%s_%s' % (v, h)
             area = getattr(Qt, '%sDockWidgetArea' % capitalize({'vertical':h, 'horizontal':v}[tprefs[p] or tprefs.defaults[p]]))
             self.setCorner(getattr(Qt, '%s%sCorner' % tuple(map(capitalize, (v, h)))), area)
+        self.preview.apply_settings()
 
     def show_status_message(self, msg, timeout=5):
         self.status_bar.showMessage(msg, int(timeout*1000))