Implement text pagination
Start double page mode
This commit is contained in:
BasioMeusPuga
@@ -465,6 +465,18 @@ class PliantQTextBrowser(QtWidgets.QTextBrowser):
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self.parent = parent
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self.main_window = main_window
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# Available modes:
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# flow - default
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# singlePage
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# doublePage
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self.text_mode = 'flow'
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# New pages will be generated following a resize
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# This is timed so as not to drive the processor nuts
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self.resizeTimer = QtCore.QTimer()
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self.resizeTimer.setSingleShot(True)
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self.resizeTimer.timeout.connect(self.create_pages)
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self.annotation_mode = False
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self.annotator = AnnotationPlacement()
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self.current_annotation = None
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@@ -485,14 +497,25 @@ class PliantQTextBrowser(QtWidgets.QTextBrowser):
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self.ignore_wheel_event_number = 0
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self.at_end = False
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self.page_cursors = []
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self.page_number = 0
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def wheelEvent(self, event):
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if self.text_mode in ('singlePage', 'doublePage'):
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vertical_pdelta = event.pixelDelta().y()
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direction = -1
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if vertical_pdelta < 0:
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direction = 1
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self.turn_page(direction)
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return
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self.record_position()
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self.common_functions.wheelEvent(event)
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def keyPressEvent(self, event):
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QtWidgets.QTextEdit.keyPressEvent(self, event)
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if event.key() == QtCore.Qt.Key_Space:
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QtWidgets.QTextEdit.keyPressEvent(self, event)
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if self.verticalScrollBar().value() == self.verticalScrollBar().maximum():
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if self.at_end: # This makes sure the last lines of the chapter don't get skipped
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self.common_functions.change_chapter(1, True)
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@@ -500,15 +523,132 @@ class PliantQTextBrowser(QtWidgets.QTextBrowser):
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else:
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self.at_end = False
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self.set_top_line_cleanly()
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self.record_position()
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return
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if self.text_mode == 'singlePage':
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if event.key() == QtCore.Qt.Key_Down:
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self.turn_page(1)
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if event.key() == QtCore.Qt.Key_Up:
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self.turn_page(-1)
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self.record_position()
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return
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QtWidgets.QTextEdit.keyPressEvent(self, event)
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def move_to_cursor(self, cursor):
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self.setTextCursor(cursor)
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self.verticalScrollBar().setValue(
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self.verticalScrollBar().maximum())
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self.ensureCursorVisible()
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def set_top_line_cleanly(self):
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# Find the cursor position of the top line and move to it
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find_cursor = self.cursorForPosition(QtCore.QPoint(0, 0))
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find_cursor.movePosition(
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find_cursor.position(), QtGui.QTextCursor.KeepAnchor)
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self.setTextCursor(find_cursor)
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self.ensureCursorVisible()
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cursorTop = self.cursorForPosition(QtCore.QPoint(0, 0))
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self.move_to_cursor(cursorTop)
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def resizeEvent(self, event=None):
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QtWidgets.QTextBrowser.resizeEvent(self, event)
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self.resizeTimer.start(100)
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def create_pages(self, text_mode=None):
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# Return to this value after page calcuation is done
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cursorTop = self.cursorForPosition(QtCore.QPoint(0, 0))
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# No changes in mode
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# if text_mode == self.text_mode:
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# return
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# Account for resizeEvent
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if not text_mode:
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if self.text_mode == 'flow':
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return
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text_mode = self.text_mode
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# Single Page mode
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page_width = self.viewport().size().width()
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page_height = self.viewport().size().height()
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# Flow mode
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if text_mode == 'flow':
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page_height = -1
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# TODO
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# See what's an appropriate value to pad the text with
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# profile_index = self.bookToolBar.profileBox.currentIndex()
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# current_profile = self.bookToolBar.profileBox.itemData(
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# profile_index, QtCore.Qt.UserRole)
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# padding = 20
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# Double page mode
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if text_mode == 'doublePage':
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page_width = page_width // 2 - 10
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self.text_mode = text_mode
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self.document().setPageSize(
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QtCore.QSizeF(page_width, page_height))
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self.generate_page_positions()
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self.set_page(cursorTop)
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def generate_page_positions(self):
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self.verticalScrollBar().setValue(0)
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cursorEnd = QtGui.QTextCursor(self.document())
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cursorEnd.movePosition(QtGui.QTextCursor.End)
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self.page_cursors = []
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while True:
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cursorTopLeft = self.cursorForPosition(
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self.viewport().rect().topLeft())
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cursorBottomLeft = self.cursorForPosition(
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self.viewport().rect().bottomLeft())
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cursorBottomRight = self.cursorForPosition(
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self.viewport().rect().bottomRight())
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self.page_cursors.append(
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(cursorTopLeft.position(), cursorBottomRight.position()))
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self.move_to_cursor(cursorBottomRight)
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# TODO
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# See if this requires a failsafe per number of iterations
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if cursorEnd.position() == cursorBottomRight.position():
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break
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def set_page(self, originalCursor):
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required_position = originalCursor.position()
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if self.text_mode == 'flow':
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page_start = required_position
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if self.text_mode == 'singlePage':
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for count, i in enumerate(self.page_cursors):
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if i[0] <= required_position < i[1]:
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page_start = i[0]
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self.page_number = count
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break
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cursorGoTo = QtGui.QTextCursor(self.document())
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cursorGoTo.setPosition(page_start)
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self.move_to_cursor(cursorGoTo)
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def turn_page(self, direction):
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self.page_number += direction
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if self.page_number in (-1, self.document().pageCount()):
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self.page_number = 0
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self.common_functions.change_chapter(direction)
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self.create_pages()
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else:
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try:
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page_start = self.page_cursors[self.page_number][0]
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cursorGoTo = QtGui.QTextCursor(self.document())
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cursorGoTo.setPosition(page_start)
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self.move_to_cursor(cursorGoTo)
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self.set_top_line_cleanly()
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except IndexError:
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pass
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def record_position(self, return_as_bookmark=False):
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self.parent.metadata['position']['is_read'] = False
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@@ -617,8 +757,26 @@ class PliantQTextBrowser(QtWidgets.QTextBrowser):
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searchWikipediaAction = searchYoutubeAction = 'Does anyone know something funny in Latin?'
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searchAction = searchGoogleAction = bookmarksToggleAction = 'TODO Insert Latin Joke'
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deleteAnnotationAction = editAnnotationNoteAction = 'Latin quote 2. Electric Boogaloo.'
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flowModeAction = singlePageAction = doublePageAction = 'We know the rules, you and I'
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annotationActions = []
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view_submenu_string = self._translate('PliantQTextBrowser', 'View')
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viewSubMenu = contextMenu.addMenu(view_submenu_string)
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viewSubMenu.setIcon(
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self.main_window.QImageFactory.get_image('mail-thread-watch'))
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flowModeAction = viewSubMenu.addAction(
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self.main_window.QImageFactory.get_image('page-flow'),
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self._translate('PliantQTextBrowser', 'Flow text'))
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singlePageAction = viewSubMenu.addAction(
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self.main_window.QImageFactory.get_image('page-single'),
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self._translate('PliantQTextBrowser', 'Single page'))
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doublePageAction = viewSubMenu.addAction(
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self.main_window.QImageFactory.get_image('page-double'),
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self._translate('PliantQTextBrowser', 'Double page'))
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if self.parent.is_fullscreen:
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fsToggleAction = contextMenu.addAction(
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self.main_window.QImageFactory.get_image('view-fullscreen'),
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@@ -709,6 +867,15 @@ class PliantQTextBrowser(QtWidgets.QTextBrowser):
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action = contextMenu.exec_(self.sender().mapToGlobal(position))
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if action == flowModeAction:
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self.create_pages('flow')
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if action == singlePageAction:
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self.create_pages('singlePage')
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if action == doublePageAction:
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self.create_pages('doublePages')
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if action == addBookMarkAction:
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self.parent.sideDock.bookmarks.add_bookmark(cursor_at_mouse.position())
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@@ -793,6 +960,8 @@ class PliantWidgetsCommonFunctions:
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self.pw.ignore_wheel_event_number = 0
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return
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# TODO
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# This can probably be cleaned up
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if self.are_we_doing_images_only:
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QtWidgets.QGraphicsView.wheelEvent(self.pw, event)
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else:
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