Question

我们的任务是在JavaFX中模拟Prim的算法。该想法是突出算法的每个步骤并且具有至少300毫秒的延迟。所以我创建了这些函数。

第一个函数重新绘制AnchorPane，以便删除所有组件，然后添加与之相关的所有组件。

private void repaintGraphViewTab() {
    graphPane.getChildren().clear();
    for(int counter = 0; counter < temporaryLines.size(); counter++) {
        Double sourceXPos = temporaryLines.get(counter).getSource().getXPosition();
        Double sourceYPos = temporaryLines.get(counter).getSource().getYPosition();
        Double destXPos = temporaryLines.get(counter).getDestination().getXPosition();
        Double destYPos = temporaryLines.get(counter).getDestination().getYPosition();
        Line currentLine = new Line(sourceXPos, sourceYPos, destXPos, destYPos);
        currentLine.setSmooth(true);
        currentLine.setDisable(true);
        currentLine.setStrokeWidth(1);
        currentLine.setStroke(simulatedColor);
        graphPane.getChildren().add(currentLine);
    }
    for(int counter = 0; counter < temporaryPoints.size(); counter ++) {
        Circle currentPoint = new Circle(temporaryPoints.get(counter).getXPosition(),temporaryPoints.get(counter).getYPosition(),5);
        currentPoint.setFill(simulatedColor);
        currentPoint.setSmooth(true);
        currentPoint.setDisable(true);
        graphPane.getChildren().add(currentPoint);  
    }
}

第二个函数修改我创建的ArrayList，它将存储我将用于重新绘制anchorpane的临时顶点和边。由于prims模拟的代码很长。我只是举个例子。

//After sorting the current edges traversable by ascending weight.
Edge currentLowestWeightEdge = adjacentEdges.remove(0);
temporaryLines.add(currentLowestWeightEdge);
repaintGraphViewTab();
Thread.sleep(300);
//Where this is called every time there is a need to be changed with the temporary lines or points arraylist.

使用后，延迟正常。但是在整个simulatePrims函数完成之后，场景才会更新。我究竟做错了什么？请帮助和建议，谢谢。

如何在JavaFX中创建延迟

0 个答案: