JavaFX - 有没有一种方法可以使用 imageview 多次打印一张图像？

Question

鉴于下面的代码，我试图多次打印单个图像(存储在变量“image”中)。关于我如何去做这件事有什么建议吗？任何信息都会有用。

    Image image = new Image("tileset.png");
    ImageView tileset = new ImageView();
    tileset.setImage(image);

    Rectangle2D viewport1 = new Rectangle2D(0,16,16,16); //(selected pixels)
    tileset.setViewport(viewport1);
    int length = 40, width= 40;  // declare size of array (print 40x40)

    // loop through grid, fill every tile with image 'image'. 
    // currently only fills position (40,40) with the image. 
    for(int y = 0; y < length; y++)
    {
        for(int x = 0; x < width; x++)
        {
            GridPane.setConstraints(tileset,x,y);
        }
    }


    root.getChildren().add(tileset);

Answer 1

方法GridPane.setConstraints(tileset,x,y)不会向gridpane添加子节点，它只是设置子节点的索引。为了将其添加到网格 Pane 中，您应该每次在循环中使用新的 ImageView 调用 root.getChildren().add(tileset)。

Image image = new Image("tileset.png");

Rectangle2D viewport1 = new Rectangle2D(0,16,16,16); //(selected pixels)
int length = 40, width= 40;  // declare size of array (print 40x40)

// loop through grid, fill every tile with image 'image'. 
// currently only fills position (40,40) with the image. 
for(int y = 0; y < length; y++)
{
    for(int x = 0; x < width; x++)
    {
        ImageView tileset = new ImageView(image);
        tileset.setViewport(viewport1);

        GridPane.setConstraints(tileset,x,y);
        root.getChildren().add(tileset);
    }
}