def _on_right_arrow_click(self):
"""
User clicks the right arrow
"""
start_index = self.ui.stackedWidget.currentIndex()
next_index = start_index + 1
if next_index == (self._num_images - 1):
# we arrived at the last slide! Hide right arrow
self.ui.right_arrow.setVisible(False)
self.ui.left_arrow.setVisible(True)
else:
self.ui.right_arrow.setVisible(True)
self.ui.left_arrow.setVisible(True)
this_page = self._pages[start_index]
next_page = self._pages[next_index]
# rest positions
next_page.move(next_page.x()+650, next_page.y())
self.ui.stackedWidget.setCurrentIndex(next_index)
this_page.show()
this_page.raise_()
self.anim = QtCore.QPropertyAnimation(this_page, "pos")
self.anim.setDuration(600)
self.anim.setStartValue(QtCore.QPoint(this_page.x(), this_page.y()))
self.anim.setEndValue(QtCore.QPoint(this_page.x()-650, this_page.y()))
self.anim.setEasingCurve(QtCore.QEasingCurve.OutCubic)
self.anim2 = QtCore.QPropertyAnimation(next_page, "pos")
self.anim2.setDuration(600)
self.anim2.setStartValue(QtCore.QPoint(next_page.x()+650, next_page.y()))
self.anim2.setEndValue(QtCore.QPoint(next_page.x(), next_page.y()))
self.anim2.setEasingCurve(QtCore.QEasingCurve.OutCubic)
self.grp = QtCore.QParallelAnimationGroup()
self.grp.addAnimation(self.anim)
self.grp.addAnimation(self.anim2)
self.grp.start()
def slide_view(self, new_page, from_direction="right"):
offsetx = self.ui.stack.frameRect().width()
offsety = self.ui.stack.frameRect().height()
current_page = self.ui.stack.currentWidget()
new_page.setGeometry(0, 0, offsetx, offsety)
if from_direction == "left":
offsetx = -offsetx
curr_pos = new_page.pos()
new_page.move(curr_pos.x() + offsetx, curr_pos.y())
new_page.show()
new_page.raise_()
anim_old = QtCore.QPropertyAnimation(current_page, "pos", self)
anim_old.setDuration(500)
anim_old.setStartValue(QtCore.QPoint(curr_pos.x(), curr_pos.y()))
anim_old.setEndValue(
QtCore.QPoint(curr_pos.x() - offsetx, curr_pos.y()))
anim_old.setEasingCurve(QtCore.QEasingCurve.OutBack)
anim_new = QtCore.QPropertyAnimation(new_page, "pos", self)
anim_new.setDuration(500)
anim_new.setStartValue(
QtCore.QPoint(curr_pos.x() + offsetx, curr_pos.y()))
anim_new.setEndValue(QtCore.QPoint(curr_pos.x(), curr_pos.y()))
anim_new.setEasingCurve(QtCore.QEasingCurve.OutBack)
anim_group = QtCore.QParallelAnimationGroup(self)
anim_group.addAnimation(anim_old)
anim_group.addAnimation(anim_new)
def slide_finished():
self.ui.stack.setCurrentWidget(new_page)
anim_group.finished.connect(slide_finished)
anim_group.start()
def __turn_page(self, direction=NEXT_PAGE):
"""
Turn the page in the direction specified
:param direction: The direction to turn the page
"""
current_index = self.ui.stackedWidget.currentIndex()
dst_index = current_index
page_offset = 650
# depending on the direction, figure out the destination page
# and page offset for animation:
if direction == Dialog.NEXT_PAGE:
dst_index += 1
page_offset = 650
# update the arrow visibility so that the right arrow is
# hidden if we're on the last page:
self.ui.right_arrow.setVisible(dst_index < (self._num_images - 1))
self.ui.left_arrow.setVisible(True)
else:
# going back a page
dst_index -= 1
page_offset = -650
# update the arrow visibility so that the left arrow is
# hidden if we're on the first page:
self.ui.right_arrow.setVisible(True)
self.ui.left_arrow.setVisible(dst_index > 0)
if not hasattr(QtCore, "QAbstractAnimation"):
# this version of Qt (probably PyQt4) doesn't contain
# Q*Animation classes so just change the page:
self.ui.stackedWidget.setCurrentIndex(dst_index)
else:
anim_duration = 600 # milliseconds
if self.__page_anim_grp and self.__page_anim_grp.state(
) == QtCore.QAbstractAnimation.Running:
# the previous animation hasn't finished yet so jump to the end!
self.__page_anim_grp.setCurrentTime(anim_duration)
# animate the transition from one page to the next:
current_page = self._pages[current_index]
dst_page = self._pages[dst_index]
# reset positions
dst_page.move(dst_page.x() + page_offset, dst_page.y())
self.ui.stackedWidget.setCurrentIndex(dst_index)
# still need to show the current page whilst it transitions
current_page.show()
current_page.raise_()
# animate the current page away
self.__anim = QtCore.QPropertyAnimation(current_page, "pos")
self.__anim.setDuration(anim_duration)
self.__anim.setStartValue(
QtCore.QPoint(current_page.x(), current_page.y()))
self.__anim.setEndValue(
QtCore.QPoint(current_page.x() - page_offset,
current_page.y()))
self.__anim.setEasingCurve(QtCore.QEasingCurve.OutCubic)
# animate the new page in:
self.__anim2 = QtCore.QPropertyAnimation(dst_page, "pos")
self.__anim2.setDuration(anim_duration)
self.__anim2.setStartValue(
QtCore.QPoint(dst_page.x() + page_offset, dst_page.y()))
self.__anim2.setEndValue(QtCore.QPoint(dst_page.x(), dst_page.y()))
self.__anim2.setEasingCurve(QtCore.QEasingCurve.OutCubic)
# create a parallel animation group so that both pages animate at
# the same time:
self.__page_anim_grp = QtCore.QParallelAnimationGroup()
self.__page_anim_grp.addAnimation(self.__anim)
self.__page_anim_grp.addAnimation(self.__anim2)
# run the animation/transition
self.__page_anim_grp.start()
