QGraphicsView for image browsing
This commit is contained in:
BasioMeusPuga
155
widgets.py
155
widgets.py
@@ -274,28 +274,14 @@ class Tab(QtWidgets.QWidget):
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# Take hint from a position function argument to open the book
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# at a specific page
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# The content display widget is currently a QTextBrowser
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super(Tab, self).__init__(parent)
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self.parent = parent
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self.metadata = metadata # Save progress data into this dictionary
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self.gridLayout = QtWidgets.QGridLayout(self)
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self.gridLayout.setObjectName("gridLayout")
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self.contentView = PliantQTextBrowser(self.window())
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self.contentView.setFrameShape(QtWidgets.QFrame.NoFrame)
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self.contentView.setObjectName("contentView")
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self.contentView.verticalScrollBar().setSingleStep(7)
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self.contentView.setHorizontalScrollBarPolicy(
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QtCore.Qt.ScrollBarAlwaysOff)
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self.scroll_past_end_tries = 0
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title = self.metadata['title']
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position = self.metadata['position']
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relative_path_root = self.metadata['temp_dir']
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relative_paths = []
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for i in os.walk(relative_path_root):
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relative_paths.append(os.path.join(relative_path_root, i[0]))
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# TODO
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# Chapter position and vertical scrollbar position
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@@ -307,13 +293,42 @@ class Tab(QtWidgets.QWidget):
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chapter_name = list(self.metadata['content'])[current_chapter - 1]
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chapter_content = self.metadata['content'][chapter_name]
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self.contentView.setSearchPaths(relative_paths)
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self.contentView.setOpenLinks(False) # Change this when HTML navigation works
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self.contentView.setHtml(chapter_content)
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# The content display widget is, by default a QTextBrowser
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# In case the incoming data is only images
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# such as in the case of comic book files,
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# we want a QGraphicsView widget doing all the heavy lifting
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# instead of a QTextBrowser
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self.are_we_doing_images_only = self.metadata['images_only']
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if self.are_we_doing_images_only: # Boolean
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self.contentView = PliantQGraphicsView(self.window())
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self.contentView.loadImage(chapter_content)
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self.setStyleSheet("background-color: black;")
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else:
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self.contentView = PliantQTextBrowser(self.window())
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relative_path_root = self.metadata['temp_dir']
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relative_paths = []
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for i in os.walk(relative_path_root):
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relative_paths.append(os.path.join(relative_path_root, i[0]))
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self.contentView.setSearchPaths(relative_paths)
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self.contentView.setOpenLinks(False) # Change this when HTML navigation works
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self.contentView.setHtml(chapter_content)
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# The following are common to both the text browser and
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# the graphics view
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self.contentView.setFrameShape(QtWidgets.QFrame.NoFrame)
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self.contentView.setObjectName("contentView")
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self.contentView.verticalScrollBar().setSingleStep(7)
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self.contentView.setHorizontalScrollBarPolicy(
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QtCore.Qt.ScrollBarAlwaysOff)
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self.generate_keyboard_shortcuts()
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self.gridLayout.addWidget(self.contentView, 0, 0, 1, 1)
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title = self.metadata['title']
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self.parent.addTab(self, title)
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def generate_position(self):
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@@ -352,40 +367,116 @@ class Tab(QtWidgets.QWidget):
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# self.exit_all.activated.connect(self.sneaky_exit)
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def exit_fullscreen(self):
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self.window().show()
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self.contentView.setWindowFlags(QtCore.Qt.Widget)
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self.contentView.setWindowState(QtCore.Qt.WindowNoState)
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self.contentView.show()
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self.window().show()
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def chapter_change(self):
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chapter_name = self.window().bookToolBar.tocBox.currentText()
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required_content = self.metadata['content'][chapter_name]
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if self.are_we_doing_images_only:
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self.contentView.loadImage(required_content)
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else:
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self.contentView.clear()
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self.contentView.setHtml(required_content)
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def format_view(self, font, font_size, foreground, background, padding):
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self.contentView.setViewportMargins(padding, 0, padding, 0)
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if self.are_we_doing_images_only:
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self.contentView.setBackgroundBrush(
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QtGui.QBrush(QtCore.Qt.black, QtCore.Qt.SolidPattern))
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else:
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self.contentView.setStyleSheet(
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"QTextEdit {{font-family: {0}; font-size: {1}px; color: {2}; background-color: {3}}}".format(
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font, font_size, foreground, background))
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def sneaky_change(self):
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direction = -1
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if self.sender().objectName() == 'nextChapter':
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direction = 1
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self.contentView.change_chapter(direction, True)
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self.contentView.common_functions.change_chapter(
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direction, True)
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def sneaky_exit(self):
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self.contentView.hide()
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self.window().closeEvent()
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class PliantQGraphicsView(QtWidgets.QGraphicsView):
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def __init__(self, main_window, parent=None):
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super(PliantQGraphicsView, self).__init__(parent)
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self.main_window = main_window
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self.image_pixmap = None
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self.ignore_wheel_event = False
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self.ignore_wheel_event_number = 0
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self.common_functions = PliantWidgetsCommonFunctions(self, self.main_window)
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def loadImage(self, image_path):
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self.image_pixmap = QtGui.QPixmap()
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self.image_pixmap.load(image_path)
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self.resizeEvent()
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def resizeEvent(self, event=None):
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if not self.image_pixmap:
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return
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profile_index = self.main_window.bookToolBar.profileBox.currentIndex()
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current_profile = self.main_window.bookToolBar.profileBox.itemData(
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profile_index, QtCore.Qt.UserRole)
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padding = current_profile['padding']
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available_width = self.viewport().width() - 2 * padding
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if self.image_pixmap.width() > available_width:
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image_pixmap = self.image_pixmap.scaledToWidth(
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available_width, QtCore.Qt.SmoothTransformation)
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else:
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image_pixmap = self.image_pixmap
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graphics_scene = QtWidgets.QGraphicsScene()
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graphics_scene.addPixmap(image_pixmap)
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self.setScene(graphics_scene)
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self.show()
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def wheelEvent(self, event):
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self.common_functions.wheelEvent(event, True)
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class PliantQTextBrowser(QtWidgets.QTextBrowser):
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def __init__(self, main_window, parent=None):
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super(PliantQTextBrowser, self).__init__(parent)
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self.main_window = main_window
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self.ignore_wheel_event = False
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self.ignore_wheel_event_number = 0
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self.common_functions = PliantWidgetsCommonFunctions(self, self.main_window)
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def wheelEvent(self, event):
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if self.ignore_wheel_event:
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self.common_functions.wheelEvent(event, False)
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class PliantWidgetsCommonFunctions():
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def __init__(self, parent_widget, main_window):
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self.pw = parent_widget
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self.main_window = main_window
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def wheelEvent(self, event, are_we_doing_images_only):
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if self.pw.ignore_wheel_event:
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# Ignore first n wheel events after a chapter change
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self.ignore_wheel_event_number += 1
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if self.ignore_wheel_event_number > 20:
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self.ignore_wheel_event = False
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self.ignore_wheel_event_number = 0
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self.pw.ignore_wheel_event_number += 1
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if self.pw.ignore_wheel_event_number > 20:
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self.pw.ignore_wheel_event = False
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self.pw.ignore_wheel_event_number = 0
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return
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QtWidgets.QTextBrowser.wheelEvent(self, event)
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if are_we_doing_images_only:
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QtWidgets.QGraphicsView.wheelEvent(self.pw, event)
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else:
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QtWidgets.QTextBrowser.wheelEvent(self.pw, event)
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# Since this is a delta on a mouse move event, it cannot ever be 0
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vertical_pdelta = event.pixelDelta().y()
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@@ -396,19 +487,19 @@ class PliantQTextBrowser(QtWidgets.QTextBrowser):
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if abs(vertical_pdelta) > 100: # Adjust sensitivity here
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# Implies that no scrollbar movement is possible
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if self.verticalScrollBar().value() == self.verticalScrollBar().maximum() == 0:
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if self.pw.verticalScrollBar().value() == self.pw.verticalScrollBar().maximum() == 0:
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if moving_up:
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self.change_chapter(-1)
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else:
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self.change_chapter(1)
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# Implies that the scrollbar is at the bottom
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elif self.verticalScrollBar().value() == self.verticalScrollBar().maximum():
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elif self.pw.verticalScrollBar().value() == self.pw.verticalScrollBar().maximum():
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if not moving_up:
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self.change_chapter(1)
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# Implies scrollbar is at the top
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elif self.verticalScrollBar().value() == 0:
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elif self.pw.verticalScrollBar().value() == 0:
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if moving_up:
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self.change_chapter(-1)
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@@ -422,12 +513,12 @@ class PliantQTextBrowser(QtWidgets.QTextBrowser):
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# Set page position depending on if the chapter number is increasing or decreasing
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if direction == 1 or was_button_pressed:
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self.verticalScrollBar().setValue(0)
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self.pw.verticalScrollBar().setValue(0)
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else:
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self.verticalScrollBar().setValue(
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self.verticalScrollBar().maximum())
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self.pw.verticalScrollBar().setValue(
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self.pw.verticalScrollBar().maximum())
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self.ignore_wheel_event = True
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self.pw.ignore_wheel_event = True
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class LibraryDelegate(QtWidgets.QStyledItemDelegate):
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