Java ScrollBar.getMax方法代码示例

import javafx.scene.control.ScrollBar; //导入方法依赖的package包/类
@Override
public Node drawNode() {
    ScrollBar scroll = createScroll(0, 100, vertical);
    scroll.setValue(50);
    scroll.setBlockIncrement(20);
    double new_value = scroll.getValue();
    double desired = scroll.getMin() + position * (scroll.getMax() - scroll.getMin());
    int direction = Double.compare(new_value, desired);
    scroll.adjustValue(position);
    if (direction != 0 && !Double.isNaN(position)) {
        double increment = scroll.getBlockIncrement();
        if (Math.abs(desired - new_value) < increment) {
            new_value = desired;
        } else {
            if (direction == 1) {
                new_value -= increment;
            } else {
                new_value += increment;
            }
        }
        if (new_value < scroll.getMin()) {
            new_value = scroll.getMin();
        }
        if (new_value > scroll.getMax()) {
            new_value = scroll.getMax();
        }
        if (Double.compare(scroll.getValue(), new_value) != 0) {
            reportGetterFailure("ScrollBar.adjustValue()");
        }
    }

    return scroll;
}
 

import javafx.scene.control.ScrollBar; //导入方法依赖的package包/类
void scrolled(ObservableValue<? extends Number> observable, Number oldValue, Number newValue) {
    double value = newValue.doubleValue();
    //System.out.println("Scrolled to " + value);
    ScrollBar bar = getVerticalScrollbar(tableView);
    if (value == bar.getMax()) {
        //System.out.println("Adding new persons.");
        //double targetValue = value * items.size();
        //addPersons();
        //bar.setValue(targetValue / items.size());
    }
}
 

import javafx.scene.control.ScrollBar; //导入方法依赖的package包/类
void scrolled(ObservableValue<? extends Number> observable, Number oldValue, Number newValue) {
    double value = newValue.doubleValue();
    System.out.println("Scrolled to " + value);
    ScrollBar bar = getVerticalScrollbar(table);
    if (value == bar.getMax()) {
        System.out.println("Adding new persons.");
        double targetValue = value * items.size();
        addPersons();
        bar.setValue(targetValue / items.size());
    }
}
 

import javafx.scene.control.ScrollBar; //导入方法依赖的package包/类
private ListChangeListener<IMatchBlock> createChangeListener(final TableItem tableItem, final LongProperty previousSelectionTime) {
    return new ListChangeListener<IMatchBlock>() {
        @Override
        public void onChanged(Change<? extends IMatchBlock> c) {
            if (c.next()) {
                if (!tableItem.getPane().getMatchSelection().isEmpty())
                    tableView.getSelectionModel().select(tableItem);
            }
            if (System.currentTimeMillis() - 200 > previousSelectionTime.get()) { // only if sufficient time has passed since last scroll...
                final double focusCoordinate;
                int focusIndex = tableItem.getPane().getMatchSelection().getFocusIndex();
                if (focusIndex >= 0) {
                    IMatchBlock focusMatch = tableItem.getPane().getMatchSelection().getItems()[focusIndex];
                    focusCoordinate = 0.5 * (focusMatch.getAlignedQueryStart() + focusMatch.getAlignedQueryEnd());
                    double leadingWidth = 0;
                    double lastWidth = 0;
                    double totalWidth = 0;
                    {
                        int numberOfColumns = tableView.getColumns().size();
                        int columns = 0;
                        for (TableColumn col : tableView.getColumns()) {
                            if (col.isVisible()) {
                                if (columns < numberOfColumns - 1)
                                    leadingWidth += col.getWidth();
                                else
                                    lastWidth = col.getWidth();
                                totalWidth += col.getWidth();
                            }
                            columns++;
                        }
                    }

                    final double coordinateToShow = leadingWidth + lastWidth * (focusCoordinate / maxReadLength.get());
                    final ScrollBar hScrollBar = FXUtilities.findScrollBar(tableView, Orientation.HORIZONTAL);

                    if (hScrollBar != null) { // should never be null, but best to check...
                        final double newPos = (hScrollBar.getMax() - hScrollBar.getMin()) * ((coordinateToShow) / totalWidth);

                        Platform.runLater(new Runnable() {
                            @Override
                            public void run() {
                                tableView.scrollTo(tableItem);
                                hScrollBar.setValue(newPos);
                            }
                        });
                    }
                }
            }
            previousSelectionTime.set(System.currentTimeMillis());
        }
    };
}
 

import javafx.scene.control.ScrollBar; //导入方法依赖的package包/类
private void scrollTo( ScrollBar scrollBar, double v ) {
    double newValue = v;
    if( newValue < scrollBar.getMin() ) newValue = scrollBar.getMin();
    if( scrollBar.getMax() < newValue ) newValue = scrollBar.getMax();
    scrollBar.setValue( newValue );
}