该刻度盘控件为一个速度仪表盘。
运行演示
分析
Item {
id: root
property real value : 0
width: 210; height: 210
Image { source: "background.png" }
//! [needle_shadow]
Image {
x: 96
y: 35
source: "needle_shadow.png"
transform: Rotation {
origin.x: 9; origin.y: 67
angle: needleRotation.angle
}
}
//! [needle_shadow]
//! [needle]
Image {
id: needle
x: 98; y: 33
antialiasing: true
source: "needle.png"
transform: Rotation {
id: needleRotation
origin.x: 5; origin.y: 65
//! [needle angle]
angle: Math.min(Math.max(-130, root.value*2.6 - 130), 133)
Behavior on angle {
SpringAnimation {
spring: 1.4
damping: .15
}
}
//! [needle angle]
}
}
//! [needle]
//! [overlay]
Image { x: 21; y: 18; source: "overlay.png" }
//! [overlay]
}
C:\Qt\{你的Qt版本}\Examples\{你的Qt版本}\quick\customitems\dialcontrol
找到。https://doc.qt.io/qt-5/qtquick-customitems-dialcontrol-example.html