E-book viewer full scrren mode: Allow clicking in the left and right page margins to turn pages. Fixes #1024819 ([Enhancement] Clic to advance page in viewer)

src/calibre/ebooks/oeb/display/full_screen.coffee

@@ -0,0 +1,65 @@
+#!/usr/bin/env coffee
+# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:ai
+
+###
+ Copyright 2012, Kovid Goyal <kovid at kovidgoyal.net>
+ Released under the GPLv3 License
+###
+
+
+log = window.calibre_utils.log
+
+class FullScreen
+    # This class is a namespace to expose functions via the
+    # window.full_screen object. The most important functions are:
+
+    constructor: () ->
+        if not this instanceof arguments.callee
+            throw new Error('FullScreen constructor called as function')
+        this.in_full_screen = false
+        this.initial_left_margin = null
+        this.initial_right_margin = null
+
+    save_margins: () ->
+        bs = document.body.style
+        this.initial_left_margin = bs.marginLeft
+        this.initial_right_margin = bs.marginRight
+
+    on: (max_text_width, in_paged_mode) ->
+        if in_paged_mode
+            window.paged_display.max_col_width = max_text_width
+        else
+            s = document.body.style
+            s.maxWidth = max_text_width + 'px'
+            s.marginLeft = 'auto'
+            s.marginRight = 'auto'
+        window.addEventListener('click', this.handle_click, false)
+
+    off: (in_paged_mode) ->
+        window.removeEventListener('click', this.handle_click, false)
+        if in_paged_mode
+            window.paged_display.max_col_width = -1
+        else
+            s = document.body.style
+            s.maxWidth = 'none'
+            if this.initial_left_margin != null
+                s.marginLeft = this.initial_left_margin
+            if this.initial_right_margin != null
+                s.marginRight = this.initial_right_margin
+
+    handle_click: (event) ->
+        if event.target != document.documentElement or event.button != 0
+            return
+        res = null
+        if window.paged_display.in_paged_mode
+            res = window.paged_display.click_for_page_turn(event)
+        else
+            br = document.body.getBoundingClientRect()
+            if not (br.left <= event.clientX <= br.right)
+                res = event.clientX < br.left
+        if res != null
+            window.py_bridge.page_turn_requested(res)
+
+if window?
+    window.full_screen = new FullScreen()
+

src/calibre/ebooks/oeb/display/paged.coffee

@@ -395,6 +395,18 @@ class PagedDisplay
             log('Viewport cfi:', ans)
         return ans
 
+    click_for_page_turn: (event) ->
+        # Check if the click event event should generate a apge turn. Returns
+        # null if it should not, true if it is a backwards page turn, false if
+        # it is a forward apge turn.
+        left_boundary = this.current_margin_side
+        right_bondary = this.screen_width - this.current_margin_side
+        if left_boundary > event.clientX
+            return true
+        if right_bondary < event.clientX
+            return false
+        return null
+
 if window?
     window.paged_display = new PagedDisplay()
 

src/calibre/gui2/viewer/documentview.py

@@ -11,7 +11,7 @@ from functools import partial
 from PyQt4.Qt import (QSize, QSizePolicy, QUrl, SIGNAL, Qt, pyqtProperty,
         QPainter, QPalette, QBrush, QFontDatabase, QDialog, QColor, QPoint,
         QImage, QRegion, QIcon, pyqtSignature, QAction, QMenu, QString,
-        pyqtSignal, QSwipeGesture, QApplication)
+        pyqtSignal, QSwipeGesture, QApplication, pyqtSlot)
 from PyQt4.QtWebKit import QWebPage, QWebView, QWebSettings
 
 from calibre.gui2.viewer.flip import SlideFlip
@@ -34,6 +34,8 @@ def load_builtin_fonts():
 
 class Document(QWebPage): # {{{
 
+    page_turn = pyqtSignal(object)
+
     def set_font_settings(self):
         opts = config().parse()
         settings = self.settings()
@@ -171,6 +173,10 @@ class Document(QWebPage): # {{{
         if not isxp and self.hyphenate and getattr(self, 'loaded_lang', ''):
             self.javascript('do_hyphenation("%s")'%self.loaded_lang)
 
+    @pyqtSlot(int)
+    def page_turn_requested(self, backwards):
+        self.page_turn.emit(bool(backwards))
+
     def _pass_json_value_getter(self):
         val = json.dumps(self.bridge_value)
         return QString(val)
@@ -187,10 +193,10 @@ class Document(QWebPage): # {{{
         self.fit_images()
         self.init_hyphenate()
         self.javascript('full_screen.save_margins()')
-        if self.in_paged_mode:
-            self.switch_to_paged_mode()
         if self.in_fullscreen_mode:
             self.switch_to_fullscreen_mode()
+        if self.in_paged_mode:
+            self.switch_to_paged_mode()
         self.read_anchor_positions(use_cache=False)
         self.first_load = False
 
@@ -445,6 +451,7 @@ class DocumentView(QWebView): # {{{
         self.connect(self.document, SIGNAL('selectionChanged()'), self.selection_changed)
         self.connect(self.document, SIGNAL('animated_scroll_done()'),
                 self.animated_scroll_done, Qt.QueuedConnection)
+        self.document.page_turn.connect(self.page_turn_requested)
         copy_action = self.pageAction(self.document.Copy)
         copy_action.setIcon(QIcon(I('convert.png')))
         d = self.document
@@ -878,6 +885,12 @@ class DocumentView(QWebView): # {{{
                 self.manager.scrolled(self.scroll_fraction)
             #print 'After all:', self.document.ypos
 
+    def page_turn_requested(self, backwards):
+        if backwards:
+            self.previous_page()
+        else:
+            self.next_page()
+
     def scroll_by(self, x=0, y=0, notify=True):
         old_pos = (self.document.xpos if self.document.in_paged_mode else
                 self.document.ypos)

src/calibre/gui2/viewer/main.py

@@ -272,9 +272,11 @@ class EbookViewer(MainWindow, Ui_EbookViewer):
                 <h1>%s</h1>
                 <h3>%s</h3>
                 <h3>%s</h3>
+                <h3>%s</h3>
                 </center>
                 '''%(_('Full screen mode'),
                     _('Right click to show controls'),
+                    _('Tap in the left or right page margin to turn pages'),
                     _('Press Esc to quit')),
                     self)
         self.full_screen_label.setVisible(False)
@@ -496,7 +498,7 @@ class EbookViewer(MainWindow, Ui_EbookViewer):
         a.setStartValue(QSize(width, 0))
         a.setEndValue(QSize(width, height))
         a.start()
-        QTimer.singleShot(2750, self.full_screen_label.hide)
+        QTimer.singleShot(3500, self.full_screen_label.hide)
         self.view.document.switch_to_fullscreen_mode()
         if self.view.document.fullscreen_clock:
             self.show_clock()