Change of line label during animation

[fbio]

as in QPropertyAnimation You can change the label line at a certain point.

import sys
from PyQt5.QtCore import QPropertyAnimation

from PyQt5.QtWidgets import QWidget, QApplication, QLabel

from PyQt5.Qt import *
class Example(QWidget):

def init(self):

super().init()

self.initUI()
def initUI(self):
    self.setGeometry(700, 300, 500, 500)
    self.setWindowTitle('Тест')

    self.label = QLabel(self)
    self.label.setText("Надпись")
    self.label.move(200, 200)

    self.animation()

def animation(self):
    self.animation_group = QSequentialAnimationGroup()

    # центр --> низ
    self.anim = QPropertyAnimation(self.label, b"pos")
    self.anim.setStartValue(QPoint(200, 200))
    self.anim.setEndValue(QPoint(200, 350))
    self.anim.setDuration(1000)
    self.animation_group.addAnimation(self.anim)

    # верх --> центр
    self.anim = QPropertyAnimation(self.label, b"pos")
    self.anim.setStartValue(QPoint(200, 50))
    self.anim.setEndValue(QPoint(200, 200))
    self.anim.setDuration(1000)
    self.animation_group.addAnimation(self.anim)

    self.animation_group.setLoopCount(3)

def keyPressEvent(self, event):
    if event.key() == Qt.Key_Space:
        self.animation_group.start()

if name == 'main':

app = QApplication(sys.argv)

ex = Example()

ex.show()

sys.exit(app.exec())

Let me get the label, every time I get upstairs, I've changed my text to another one. How can you do that?

[jonetta]

You need to track the change of current animation (with QPropertyAnimation issuing the currentAnimationChanged signal)

import sys
from PyQt5.QtCore import QPropertyAnimation

from PyQt5.QtWidgets import QWidget, QApplication, QLabel

from PyQt5.Qt import *
class Example(QWidget):

def init(self):

super().init()

self.initUI()
def initUI(self):
    self.setGeometry(700, 300, 500, 500)
    self.setWindowTitle('Тест')

    self.label = QLabel(self)
    self.label.setText("Надпись")
    self.label.move(200, 200)
    self.animation()

def animation(self):
    self.colors = ['#0000FF', '#00FF00', '#FF0000', '#FF0000']
    self.animation_group = QSequentialAnimationGroup()

    # центр --> низ
    self.anim = QPropertyAnimation(self.label, b"pos")
    self.anim.setStartValue(QPoint(200, 200))
    self.anim.setEndValue(QPoint(200, 350))
    self.anim.setDuration(1000)
    self.animation_group.addAnimation(self.anim)

    # верх --> центр
    self.anim2 = QPropertyAnimation(self.label, b"pos")
    self.anim2.setStartValue(QPoint(200, 50))
    self.anim2.setEndValue(QPoint(200, 200))
    self.anim2.setDuration(1000)
    self.animation_group.addAnimation(self.anim2)

    self.animation_group.setLoopCount(3)
    self.animation_group.currentAnimationChanged.connect(self.changeColor)


def keyPressEvent(self, event):
    if event.key() == Qt.Key_Space:
        self.animation_group.start()
def changeColor(self,anim):
    if anim == self.anim2:
        c = self.colors.pop(0)
        self.colors.append(c)
        self.label.setStyleSheet(f'color: {c}')

if name == 'main':

app = QApplication(sys.argv)

ex = Example()

ex.show()

sys.exit(app.exec())