我正在尝试使用Python、PySide和一个示例QML文件来制作一个简单的ui。如何从Python应用程序中设置QML控件中可用的"value"属性?到目前为止,"SpeedDial"出现了,但不知道如何更改它的值。
Python文件:
import sys
from PySide.QtCore import *
from PySide.QtGui import *
from PySide.QtDeclarative import QDeclarativeView
# Create Qt application and the QDeclarative view
app = QApplication(sys.argv)
view = QDeclarativeView()
# Create an URL to the QML file
url = QUrl('SpeedDial.qml')
# Set the QML file and show
view.setSource(url)
view.show()
# Enter Qt main loop
sys.exit(app.exec_())
qml文件:
import QtQuick 1.0
Item {
id: root1
property real value : 0
width: 300; height: 300
Image { id: speed_inactive; x: -9; y: 8; opacity: 0.8; z: 3; source: "pics/speed_inactive.png"
}
Image {
id: needle
x: 136; y: 86
clip: true
opacity: root1.opacity
z: 3
smooth: true
source: "pics/needle.png"
transform: Rotation {
id: needleRotation
origin.x: 5; origin.y: 65
angle: Math.min(Math.max(-130, root1.value*2.6 - 130), 133)
Behavior on angle {
SpringAnimation {
spring: 1.4
damping: .15
}
}
}
}
}
您不应该直接从Python或C++控制QML属性。
定义一个Python类,该类将表示具有属性speed
的汽车。像这样在QML中实例化:
Car {
id: car
}
然后使用它的速度:
angle: car.speed