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créer une animation sur un point dans QGraphicsView ?
Bonjour;
avec PYQT5 et dans QGraphicsView comment créer une animation sur spécifique point(x,y) comme l'image ci-dessous
je fait le partie d'affichage des points a partir un fichier : poitns_file.txt (attaché a discusion ) sur mon code et il reste que le partie d'animation sur un point
Code:
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| from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
import sys
from math import sqrt
import pandas as pd
class Viewer(QGraphicsView):
photoClicked = pyqtSignal(QPoint)
rectChanged = pyqtSignal(QRect)
def __init__(self, parent):
super(Viewer, self).__init__(parent)
self.rubberBand = QRubberBand(QRubberBand.Rectangle, self)
self.setMouseTracking(True)
self.origin = QPoint()
self.changeRubberBand = False
self._zoom = 0
self._empty = True
self._scene = QGraphicsScene(self)
self.setTransformationAnchor(QGraphicsView.AnchorUnderMouse)
self.setResizeAnchor(QGraphicsView.AnchorUnderMouse)
self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
self.setFrameShape(QFrame.NoFrame)
self.area = float()
self.setPoints()
self.fitInView()
def setPoints(self):
self._zoom = 0
df = pd.read_csv('points_file.txt', sep=" ", header=None)
df.columns = ["pt_name", "x", "y"]
rad = 75
for i in range(df.shape[0]):
pt2 = QGraphicsEllipseItem(float(df["x"].iloc[i]), float(df["y"].iloc[i]), rad, rad) # add point
pt2.setBrush(QBrush(Qt.green))
maxX = max(df['x'])
minX = min(df['x'])
maxY = max(df['y'])
minY = min(df['y'])
distance = sqrt((maxX-minX)**2+(maxY-minY)**2)
self.setScene(self._scene)
self.setDragMode(self.ScrollHandDrag)
def fitInView(self, scale=True):
rect = QRectF(self.area)
if not rect.isNull():
self.setSceneRect(rect)
unity = self.transform().mapRect(QRectF(0, 0, 1, 1))
self.scale(1 / unity.width(), 1 / unity.height())
viewrect = self.viewport().rect()
scenerect = self.transform().mapRect(rect)
factor = min(viewrect.width() / scenerect.width(),
viewrect.height() / scenerect.height())
self.scale(factor, factor)
self._zoom = 0
def wheelEvent(self, event):
if event.angleDelta().y() > 0:
factor = 1.25
self._zoom += 1
else:
factor = 0.8
self._zoom -= 1
if self._zoom > 0:
self.scale(factor, factor)
elif self._zoom == 0:
self.fitInView()
else:
self._zoom = 0
class Window(QWidget):
def __init__(self):
super(Window, self).__init__()
self.viewer = Viewer(self)
self.btnLoad = QToolButton(self)
self.btnLoad.setText('Fit Into View')
self.btnLoad.clicked.connect(self.fitPoints)
VBlayout = QVBoxLayout(self)
VBlayout.addWidget(self.viewer)
HBlayout = QHBoxLayout()
HBlayout.setAlignment(Qt.AlignLeft)
HBlayout.addWidget(self.btnLoad)
VBlayout.addLayout(HBlayout)
self.viewer.fitInView()
def fitPoints(self):
self.viewer.fitInView()
if __name__ == '__main__':
import sys
app = QApplication(sys.argv)
window = Window()
window.setGeometry(500, 300, 800, 600)
window.show()
sys.exit(app.exec_()) |
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