Question

我正在尝试创建自己的工具提示实现，该实现带有箭头，并在其安装节点的特定一侧显示工具提示。看起来像这样：

这是我到目前为止编写的代码

Tooltip.java

public class Tooltip extends PopupControl {

    private StringProperty message = new SimpleStringProperty();
    private final static TooltipSkin skin = new TooltipSkin();
    private final static TooltipBehavior behavior = new TooltipBehavior();

    public Tooltip(Node node, String message) {
        this.message.setValue(message);
        if (getContent() != skin.createSkin()) {
            getContent().setAll(skin.createSkin());
        }
        behavior.install(node, Tooltip.this);
    }

    /****************************************************************
     **********                  ACCESSORS               ************
     ****************************************************************/

    String getMessage() {
        return message.get();
    }

    StringProperty messageProperty() {
        return message;
    }

    private static class TooltipBehavior {
        final String TOOLTIP_PROP_KEY = "fxtooltip";

        private void install(Node node, Tooltip tooltip) {
            if (node == null)
                return;
            node.addEventHandler(MouseEvent.MOUSE_ENTERED, ENTERED_HANDLER);
            node.addEventHandler(MouseEvent.MOUSE_EXITED, KILL_HANDLER);
            node.addEventHandler(MouseEvent.MOUSE_PRESSED, KILL_HANDLER);
            node.getProperties().put(TOOLTIP_PROP_KEY, tooltip);
        }

        private EventHandler<MouseEvent> ENTERED_HANDLER = (MouseEvent event) -> {
            Node hoveredNode = (Node) event.getSource();
            Tooltip tooltip = ((Tooltip) hoveredNode.getProperties().get(TOOLTIP_PROP_KEY));
            String message = tooltip.getMessage();
            skin.setMessage(message);
            tooltip.show(getWindow(hoveredNode), 0, 0);
        };
        private EventHandler<MouseEvent> KILL_HANDLER = (MouseEvent event) -> {
            Node hoveredNode = (Node) event.getSource();
            Tooltip tooltip = ((Tooltip) hoveredNode.getProperties().get(TOOLTIP_PROP_KEY));
            tooltip.hide();
        };

        private Window getWindow(final Node node) {
            final Scene scene = node == null ? null : node.getScene();
            return scene == null ? null : scene.getWindow();
        }
    }

    private static class TooltipSkin {
        private static HBox $RootView = new HBox();
        private static StackPane $PaneMessageBody = new StackPane();
        private static StackPane $PaneArrow = new StackPane();
        private static Text $TextMessage = new Text();
        private static boolean skinInitialized = false;

        Pane createSkin() {
            if (skinInitialized) {
                return $RootView;
            } else {
                skinInitialized = true;
                $RootView.getChildren().addAll($PaneMessageBody, $PaneArrow);
                $PaneMessageBody.getChildren().addAll($TextMessage);
            }
            return $RootView;
        }

        void setMessage(String message) {
            $TextMessage.setText(message);
        }
    }
}

在我的控制器中，我有一些按钮，我以此方式添加了工具提示

new Tooltip($BtnDownload, "Download");
new Tooltip($BtnActivate, "Activate");

但是，这仅在安装了工具提示的最后一个节点上有效，如果我将鼠标悬停在具有工具提示的其他节点上，光标开始闪烁，并且工具提示完全不显示。问题可能在这里吗？

Javafx自定义工具提示实现仅在安装的最后一个节点上显示

0 个答案: