CODEWITHSUNDEEP
javacssjavafx
user5182503
user5182503

Reputation:

Separate css rules for dividers of one splitPane

I have the following css class in css file

.split-pane > .split-pane-divider {  
    -fx-background-insets: 0;
    -fx-padding: 0 0 0 0;  
    -fx-background-color: red;
}

And I have a splitPane with two dividers and I have reference to these dividers as Node(!). I mean

Node leftDivider;
Node rightDivider;

I get reference to them this way

List<Node> nodes=getDividerNodes(splitPane);
leftDivider=nodes.get(0);
rightDivider=nodes.get(1);

...
public static List<Node> getDividerNodes(SplitPane splitPane){
    Map<Double,Node> sortedMap=new TreeMap<>();
    if (splitPane.getOrientation()==Orientation.HORIZONTAL){
        splitPane.lookupAll(".split-pane-divider").stream().forEach(div ->  {
            if (div.getParent()==splitPane){
                sortedMap.put(div.getLayoutX(), div);
            }
        });
    }else{
        splitPane.lookupAll(".split-pane-divider").stream().forEach(div ->  {
            if (div.getParent()==splitPane){
                sortedMap.put(div.getLayoutY(), div);
            }
        });
    }
    return new ArrayList<>(sortedMap.values());
}

Now I wan't to display leftDivider but not to display rightDivider. I do

leftDivider.setStyle("-fx-padding: 0 5 0 0;");

However, I see both dividers - left and right. Besides, if I want to see only right divider and I do

rightDivider.setStyle("-fx-padding: 0 5 0 0;");

I don't see any dividers.

It seems to me that separate control of dividers inside one splitPane is not possible. If I wrong, please, say how can I show only one of two dividers?

Upvotes: 3

Views: 460

Answers (1)

James_D
James_D

Reputation: 209684

This looks like a bug. In particular, the SplitPaneSkin class contains the following method:

private void layoutDividersAndContent(double width, double height) {
    final double paddingX = snappedLeftInset();
    final double paddingY = snappedTopInset();
    final double dividerWidth = contentDividers.isEmpty() ? 0 : contentDividers.get(0).prefWidth(-1);

    for (Content c: contentRegions) {
//        System.out.println("LAYOUT " + c.getId() + " PANELS X " + c.getX() + " Y " + c.getY() + " W " + (horizontal ? c.getArea() : width) + " H " + (horizontal ? height : c.getArea()));
        if (horizontal) {
            c.setClipSize(c.getArea(), height);
            layoutInArea(c, c.getX() + paddingX, c.getY() + paddingY, c.getArea(), height,
                0/*baseline*/,HPos.CENTER, VPos.CENTER);
        } else {
            c.setClipSize(width, c.getArea());
            layoutInArea(c, c.getX() + paddingX, c.getY() + paddingY, width, c.getArea(),
                0/*baseline*/,HPos.CENTER, VPos.CENTER);
        }
    }
    for (ContentDivider c: contentDividers) {
//        System.out.println("LAYOUT DIVIDERS X " + c.getX() + " Y " + c.getY() + " W " + (horizontal ? dividerWidth : width) + " H " + (horizontal ? height : dividerWidth));
        if (horizontal) {
            c.resize(dividerWidth, height);
            positionInArea(c, c.getX() + paddingX, c.getY() + paddingY, dividerWidth, height,
                /*baseline ignored*/0, HPos.CENTER, VPos.CENTER);
        } else {
            c.resize(width, dividerWidth);                
            positionInArea(c, c.getX() + paddingX, c.getY() + paddingY, width, dividerWidth,
                /*baseline ignored*/0, HPos.CENTER, VPos.CENTER);
        }
    }
}

As you can see, dividerWidth is computed for a single divider, and the same value is used in the layout of all dividers. Consequently all dividers are the same size, irrespective of the different styles they may each have.

I recommend you search to see if this is already reported (I did a quick search and didn't find anything), and report it if not.

Upvotes: 0

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