Example usage for java.awt.event MouseWheelEvent getUnitsToScroll

Introduction

In this page you can find the example usage for java.awt.event MouseWheelEvent getUnitsToScroll.

Prototype

public int getUnitsToScroll() 

Source Link

Document

This is a convenience method to aid in the implementation of the common-case MouseWheelListener - to scroll a ScrollPane or JScrollPane by an amount which conforms to the platform settings.

Usage

From source file:Main.java

public void mouseWheelMoved(MouseWheelEvent e) {
    String message;/*from  w ww .  j  ava  2  s  .com*/
    int notches = e.getWheelRotation();
    if (notches < 0) {
        message = "Mouse wheel moved UP " + -notches + " notch(es)" + newline;
    } else {
        message = "Mouse wheel moved DOWN " + notches + " notch(es)" + newline;
    }
    if (e.getScrollType() == MouseWheelEvent.WHEEL_UNIT_SCROLL) {
        message += "    Scroll type: WHEEL_UNIT_SCROLL" + newline;
        message += "    Scroll amount: " + e.getScrollAmount() + " unit increments per notch" + newline;
        message += "    Units to scroll: " + e.getUnitsToScroll() + " unit increments" + newline;
        message += "    Vertical unit increment: " + scrollPane.getVerticalScrollBar().getUnitIncrement(1)
                + " pixels" + newline;
    } else { // scroll type == MouseWheelEvent.WHEEL_BLOCK_SCROLL
        message += "    Scroll type: WHEEL_BLOCK_SCROLL" + newline;
        message += "    Vertical block increment: " + scrollPane.getVerticalScrollBar().getBlockIncrement(1)
                + " pixels" + newline;
    }
    saySomething(message, e);
}

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From source file:MouseWheelEventDemo.java

public void mouseWheelMoved(MouseWheelEvent e) {
    String message;//from  w  w  w .j  a v  a2  s. co m
    int notches = e.getWheelRotation();
    if (notches < 0) {
        message = "Mouse wheel moved UP " + -notches + " notch(es)" + newline;
    } else {
        message = "Mouse wheel moved DOWN " + notches + " notch(es)" + newline;
    }
    if (e.getScrollType() == MouseWheelEvent.WHEEL_UNIT_SCROLL) {
        message += "    Scroll type: WHEEL_UNIT_SCROLL" + newline;
        message += "    Scroll amount: " + e.getScrollAmount() + " unit increments per notch" + newline;
        message += "    Units to scroll: " + e.getUnitsToScroll() + " unit increments" + newline;
        message += "    Vertical unit increment: " + scrollPane.getVerticalScrollBar().getUnitIncrement(1)
                + " pixels" + newline;
    } else { //scroll type == MouseWheelEvent.WHEEL_BLOCK_SCROLL
        message += "    Scroll type: WHEEL_BLOCK_SCROLL" + newline;
        message += "    Vertical block increment: " + scrollPane.getVerticalScrollBar().getBlockIncrement(1)
                + " pixels" + newline;
    }
    saySomething(message, e);
}

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From source file:events.MouseWheelEventDemo.java

public void mouseWheelMoved(MouseWheelEvent e) {
    String message;/*from w  w  w.  j av a2s . co m*/
    int notches = e.getWheelRotation();
    if (notches < 0) {
        message = "Mouse wheel moved UP " + -notches + " notch(es)" + NEWLINE;
    } else {
        message = "Mouse wheel moved DOWN " + notches + " notch(es)" + NEWLINE;
    }
    if (e.getScrollType() == MouseWheelEvent.WHEEL_UNIT_SCROLL) {
        message += "    Scroll type: WHEEL_UNIT_SCROLL" + NEWLINE;
        message += "    Scroll amount: " + e.getScrollAmount() + " unit increments per notch" + NEWLINE;
        message += "    Units to scroll: " + e.getUnitsToScroll() + " unit increments" + NEWLINE;
        message += "    Vertical unit increment: " + scrollPane.getVerticalScrollBar().getUnitIncrement(1)
                + " pixels" + NEWLINE;
    } else { //scroll type == MouseWheelEvent.WHEEL_BLOCK_SCROLL
        message += "    Scroll type: WHEEL_BLOCK_SCROLL" + NEWLINE;
        message += "    Vertical block increment: " + scrollPane.getVerticalScrollBar().getBlockIncrement(1)
                + " pixels" + NEWLINE;
    }
    eventOutput(message, e);
}

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From source file:com.anrisoftware.prefdialog.miscswing.multichart.freechart.FreechartXYChart.java

private Object resolveObject() {
    this.p = new PropertyChangeSupport(this);
    this.mouseScrollListener = new MouseWheelListener() {

        @Override/*  w  w  w . jav a 2  s  .  co  m*/
        public void mouseWheelMoved(MouseWheelEvent e) {
            if (model == null) {
                return;
            }
            if (e.getScrollType() == MouseWheelEvent.WHEEL_UNIT_SCROLL) {
                int offset = model.getOffset();
                setOffset(offset + e.getUnitsToScroll());
            }
        }
    };
    this.modelListener = new ChartModelListener() {

        @Override
        public void chartChanged(ChartModelEvent e) {
            updateChart(e);
        }
    };
    return this;
}

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From source file:org.evors.rs.ui.sandpit.SandPitCanvas.java

public SandPitCanvas() {

    camera = new SandPitCamera(Vector2D.ZERO, Vector2D.ZERO, 50);
    grid = new Grid(camera);

    MouseAdapter mouseAdapter = new MouseAdapter() {
        private Vector2D prevCoord = Vector2D.NaN;

        @Override//from   ww w. j a v a2 s  . c  o  m
        public void mouseDragged(MouseEvent me) {
            Vector2D newCoord = getCamera().convertScreenToWorldCoords(new Vector2D(me.getX(), me.getY()));
            if (prevCoord == Vector2D.NaN) {
                prevCoord = newCoord;
            } else {
                Vector2D sub = newCoord.subtract(prevCoord);
                getCamera().move(sub);
                draw();
            }
        }

        @Override
        public void mouseReleased(MouseEvent me) {
            prevCoord = Vector2D.NaN;
        }

        @Override
        public void mouseWheelMoved(MouseWheelEvent mwe) {
            getCamera().changeScale(-0.5 * mwe.getUnitsToScroll());
            draw();
        }

    };

    addMouseListener(mouseAdapter);
    addMouseMotionListener(mouseAdapter);
    addMouseWheelListener(mouseAdapter);

}

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