gradient - 在 BlackBerry 10 上绘制渐变（Cascades 和 C++）

Question

有什么方法可以在 Cascades 或/和 C++ 中绘制简单的线性渐变？我找到了一个使用 QtQuick 库（https://developer.blackberry.com/cascades/reference/qmlreusablecomponents.html）的示例，但它不起作用。Momentics 甚至无法识别此库的导入

Answer 1

Unfortunately gradients are not possible to do that way in Cascades.

I would recommend using an gradient image and ImagePaintDefinition. For example:

Container {
    layout: DockLayout {

    }
    preferredHeight: constants.headerHeight
    minHeight: preferredHeight
    maxHeight: preferredHeight

    minWidth: constants.screenWidth
    background: back.imagePaint

    attachedObjects: [
        Constants {
            id: constants
        },
        ImagePaintDefinition {
            id: back
            imageSource: "asset:///images/header_solid.png"
            repeatPattern: RepeatPattern.X
        }
    ]
}