javax.swing.Scrollable Java Exaples

Source File: OutlineView.java From netbeans with Apache License 2.0

5 votes

@Override
public Dimension preferredLayoutSize(Container parent) {
    Dimension dim = super.preferredLayoutSize(parent);
    OutlineView ov = (OutlineView) parent;
    int thsbPolicy = ov.treeHorizontalScrollBarPolicy;
    if ((thsb != null) && (thsbPolicy != HORIZONTAL_SCROLLBAR_NEVER)) {
        if (thsbPolicy == HORIZONTAL_SCROLLBAR_ALWAYS) {
            dim.height += thsb.getPreferredSize().height;
        }
        else {
            Dimension extentSize = null;
            Dimension viewSize = null;
            Component view = null;

            if (viewport !=  null) {
                extentSize = viewport.getPreferredSize();
                viewSize = viewport.getViewSize();
                view = viewport.getView();
            }

            if ((viewSize != null) && (extentSize != null)) {
                boolean canScroll = true;
                if (view instanceof Scrollable) {
                    canScroll = !((Scrollable)view).getScrollableTracksViewportWidth();
                }
                if (canScroll && (viewSize.width > extentSize.width)) {
                    dim.height += thsb.getPreferredSize().height;
                }
            }
        }
    }
    return dim;
}

Source File: IndexedEditorPanel.java From netbeans with Apache License 2.0

5 votes

private boolean isEditorScrollable(PropertyPanel p) {
    Component[] comps = p.getComponents();

    for (int i = 0; i < comps.length; i++) {
        if (comps[i] instanceof Scrollable || isInstanceOfTopComponent(comps[i])) {
            return true;
        }
    }

    return false;
}

Source File: ScrollAction.java From netbeans with Apache License 2.0

5 votes

private int getDefaultIncrement() {
    Component content = scrollPane.getViewport().getView();
    Point position = scrollPane.getViewport().getViewPosition();
    int increment = isHorizontal ? 30 : 8;
    Dimension viewSize = scrollPane.getViewport().getExtentSize();
    if( content instanceof Scrollable ) {
        increment = ((Scrollable)content).getScrollableUnitIncrement( new Rectangle( position, viewSize ),
                isHorizontal ? SwingConstants.HORIZONTAL : SwingConstants.VERTICAL,
                isScrollLeft ? -1 : 1 );
    }
    return increment;
}

Source File: SmoothScrollPaneUI.java From netbeans with Apache License 2.0

5 votes

private void mouseWheelMoved(MouseWheelEvent e) {
    /* The code in this method is taken directly from Pavel Fatin's original IntelliJ patch.
    Some formatting changes have been applied. */
    /* The shift modifier will be enabled for horizontal touchbar scroll events, even when the
    actual shift key is not pressed, on both Windows and MacOS (though not on Java 8 on
    Windows). */
    JScrollBar scrollbar = e.isShiftDown()
            ? scrollpane.getHorizontalScrollBar() : scrollpane.getVerticalScrollBar();
    int orientation = scrollbar.getOrientation();
    JViewport viewport = scrollpane.getViewport();
    if (viewport == null || !(viewport.getView() instanceof Scrollable)) {
        return;
    }
    Scrollable view = (Scrollable) viewport.getView();
    double rotation = e.getPreciseWheelRotation();
    /* Use (0, 0) view position to obtain constant unit increment (which might otherwise be
    variable on smaller-than-unit scrolling). */
    Rectangle r = new Rectangle(new Point(0, 0), viewport.getViewSize());
    int unitIncrement = view.getScrollableUnitIncrement(r, orientation, 1);
    double delta = rotation * e.getScrollAmount() * unitIncrement;
    boolean limitDelta = Math.abs(rotation) < 1.0d + EPSILON;
    int blockIncrement = view.getScrollableBlockIncrement(r, orientation, 1);
    double adjustedDelta = limitDelta
            ? Math.max(-(double) blockIncrement, Math.min(delta, (double) blockIncrement))
            : delta;
    int value = scrollbar.getValue();
    int newValue = Math.max(scrollbar.getMinimum(),
            Math.min((int) Math.round(value + adjustedDelta), scrollbar.getMaximum()));
    if (newValue != value) {
        scrollbar.setValue(newValue);
    }
}

Source File: BasicOutlookBarUI.java From CodenameOne with GNU General Public License v2.0

5 votes

public JScrollPane makeScrollPane(Component component) {
  // the component is not scrollable, wraps it in a ScrollableJPanel
  JScrollPane scroll = new JScrollPane();
  scroll.setBorder(BorderFactory.createEmptyBorder());
  if (component instanceof Scrollable) {
    scroll.getViewport().setView(component);
  } else {
    scroll.getViewport().setView(new ScrollableJPanel(component));
  }
  scroll.setOpaque(false);
  scroll.getViewport().setOpaque(false);
  return scroll;
}

Source File: FlatScrollPaneUI.java From FlatLaf with Apache License 2.0

4 votes

private void mouseWheelMovedSmooth( MouseWheelEvent e ) {
		// return if there is no viewport
		JViewport viewport = scrollpane.getViewport();
		if( viewport == null )
			return;

		// find scrollbar to scroll
		JScrollBar scrollbar = scrollpane.getVerticalScrollBar();
		if( scrollbar == null || !scrollbar.isVisible() || e.isShiftDown() ) {
			scrollbar = scrollpane.getHorizontalScrollBar();
			if( scrollbar == null || !scrollbar.isVisible() )
				return;
		}

		// consume event
		e.consume();

		// get precise wheel rotation
		double rotation = e.getPreciseWheelRotation();

		// get unit and block increment
		int unitIncrement;
		int blockIncrement;
		int orientation = scrollbar.getOrientation();
		Component view = viewport.getView();
		if( view instanceof Scrollable ) {
			Scrollable scrollable = (Scrollable) view;

			// Use (0, 0) view position to obtain constant unit increment of first item
			// (which might otherwise be variable on smaller-than-unit scrolling).
			Rectangle visibleRect = new Rectangle( viewport.getViewSize() );
			unitIncrement = scrollable.getScrollableUnitIncrement( visibleRect, orientation, 1 );
			blockIncrement = scrollable.getScrollableBlockIncrement( visibleRect, orientation, 1 );

			if( unitIncrement > 0 ) {
				// For the case that the first item (e.g. in a list) is larger
				// than the other items, get the unit increment of the second item
				// and use the smaller one.
				if( orientation == SwingConstants.VERTICAL ) {
					visibleRect.y += unitIncrement;
					visibleRect.height -= unitIncrement;
				} else {
					visibleRect.x += unitIncrement;
					visibleRect.width -= unitIncrement;
				}
				int unitIncrement2 = scrollable.getScrollableUnitIncrement( visibleRect, orientation, 1 );
				if( unitIncrement2 > 0 )
					unitIncrement = Math.min( unitIncrement, unitIncrement2 );
			}
		} else {
			int direction = rotation < 0 ? -1 : 1;
			unitIncrement = scrollbar.getUnitIncrement( direction );
			blockIncrement = scrollbar.getBlockIncrement( direction );
		}

		// limit scroll amount (number of units to scroll) for small viewports
		// (e.g. vertical scrolling in file chooser)
		int scrollAmount = e.getScrollAmount();
		int viewportWH = (orientation == SwingConstants.VERTICAL)
			? viewport.getHeight()
			: viewport.getWidth();
		if( unitIncrement * scrollAmount > viewportWH )
			scrollAmount = Math.max( viewportWH / unitIncrement, 1 );

		// compute relative delta
		double delta = rotation * scrollAmount * unitIncrement;
		boolean adjustDelta = Math.abs( rotation ) < (1.0 + EPSILON);
		double adjustedDelta = adjustDelta
			? Math.max( -blockIncrement, Math.min( delta, blockIncrement ) )
			: delta;

		// compute new value
		int value = scrollbar.getValue();
		double minDelta = scrollbar.getMinimum() - value;
		double maxDelta = scrollbar.getMaximum() - scrollbar.getModel().getExtent() - value;
		double boundedDelta = Math.max( minDelta, Math.min( adjustedDelta, maxDelta ) );
		int newValue = value + (int) Math.round( boundedDelta );

		// set new value
		if( newValue != value )
			scrollbar.setValue( newValue );

/*debug
		System.out.println( String.format( "%4d  %9f / %4d %4d / %12f %5s %12f / %4d %4d %4d / %12f %12f %12f / %4d",
			e.getWheelRotation(),
			e.getPreciseWheelRotation(),
			unitIncrement,
			blockIncrement,
			delta,
			adjustDelta,
			adjustedDelta,
			value,
			scrollbar.getMinimum(),
			scrollbar.getMaximum(),
			minDelta,
			maxDelta,
			boundedDelta,
			newValue ) );
*/
	}

Source File: DetailsPanel.java From netbeans with Apache License 2.0

4 votes

private void initComponents() {        
    table = new DetailsTable();
    table.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

    JViewport viewport = new Viewport(table);

    final JScrollPane tableScroll = new JScrollPane(
                                        JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
                                        JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
    tableScroll.setViewport(viewport);
    tableScroll.setBorder(BorderFactory.createEmptyBorder());
    tableScroll.setViewportBorder(BorderFactory.createEmptyBorder());
    tableScroll.setCorner(JScrollPane.UPPER_RIGHT_CORNER, new HeaderPanel());
    
    scrollBar = new ScrollBar(JScrollBar.VERTICAL) {
        public int getUnitIncrement(int direction) {
            JViewport vp = tableScroll.getViewport();
            Scrollable view = (Scrollable)(vp.getView());
            Rectangle vr = vp.getViewRect();
            return view.getScrollableUnitIncrement(vr, getOrientation(), direction);
        }
        public int getBlockIncrement(int direction) {
            JViewport vp = tableScroll.getViewport();
            Scrollable view = (Scrollable)(vp.getView());
            Rectangle vr = vp.getViewRect();
            return view.getScrollableBlockIncrement(vr, getOrientation(), direction);
        }
        public void setValues(int newValue, int newExtent, int newMin, int newMax) {
            setEnabled(newExtent < newMax);
            if (isEnabled() && !isSelectionChanging() && isTrackingEnd())
                newValue = newMax - newExtent;
            super.setValues(newValue, newExtent, newMin, newMax);
        }
    };
    tableScroll.setVerticalScrollBar(scrollBar);
    dataContainer = tableScroll;

    JLabel noDataLabel = new JLabel("<No probe selected>", JLabel.CENTER);
    noDataLabel.setEnabled(false);
    noDataContainer = new JPanel(new BorderLayout());
    noDataContainer.setOpaque(false);
    noDataContainer.add(noDataLabel, BorderLayout.CENTER);

    setOpaque(false);
    setLayout(new BorderLayout());
    add(noDataContainer, BorderLayout.CENTER);
}

Source File: DetailsPanel.java From visualvm with GNU General Public License v2.0

4 votes

private void initComponents() {        
    table = new DetailsTable();
    table.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

    JViewport viewport = new Viewport(table);

    final JScrollPane tableScroll = new JScrollPane(
                                        JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
                                        JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
    tableScroll.setViewport(viewport);
    tableScroll.setBorder(BorderFactory.createEmptyBorder());
    tableScroll.setViewportBorder(BorderFactory.createEmptyBorder());
    tableScroll.setCorner(JScrollPane.UPPER_RIGHT_CORNER, new HeaderPanel());
    
    scrollBar = new ScrollBar(JScrollBar.VERTICAL) {
        public int getUnitIncrement(int direction) {
            JViewport vp = tableScroll.getViewport();
            Scrollable view = (Scrollable)(vp.getView());
            Rectangle vr = vp.getViewRect();
            return view.getScrollableUnitIncrement(vr, getOrientation(), direction);
        }
        public int getBlockIncrement(int direction) {
            JViewport vp = tableScroll.getViewport();
            Scrollable view = (Scrollable)(vp.getView());
            Rectangle vr = vp.getViewRect();
            return view.getScrollableBlockIncrement(vr, getOrientation(), direction);
        }
        public void setValues(int newValue, int newExtent, int newMin, int newMax) {
            setEnabled(newExtent < newMax);
            if (isEnabled() && !isSelectionChanging() && isTrackingEnd())
                newValue = newMax - newExtent;
            super.setValues(newValue, newExtent, newMin, newMax);
        }
    };
    tableScroll.setVerticalScrollBar(scrollBar);
    dataContainer = tableScroll;

    JLabel noDataLabel = new JLabel("<No probe selected>", JLabel.CENTER);
    noDataLabel.setEnabled(false);
    noDataContainer = new JPanel(new BorderLayout());
    noDataContainer.setOpaque(false);
    noDataContainer.add(noDataLabel, BorderLayout.CENTER);

    setOpaque(false);
    setLayout(new BorderLayout());
    add(noDataContainer, BorderLayout.CENTER);
}

Source File: DetailsPanel.java From visualvm with GNU General Public License v2.0

4 votes

private void initComponents() {        
    table = new DetailsTable();
    table.getSelectionModel().setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

    JViewport viewport = new Viewport(table);

    final JScrollPane tableScroll = new JScrollPane(
                                        JScrollPane.VERTICAL_SCROLLBAR_ALWAYS,
                                        JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
    tableScroll.setViewport(viewport);
    tableScroll.setBorder(BorderFactory.createEmptyBorder());
    tableScroll.setViewportBorder(BorderFactory.createEmptyBorder());
    tableScroll.setCorner(JScrollPane.UPPER_RIGHT_CORNER, new HeaderPanel());
    
    scrollBar = new ScrollBar(JScrollBar.VERTICAL) {
        public int getUnitIncrement(int direction) {
            JViewport vp = tableScroll.getViewport();
            Scrollable view = (Scrollable)(vp.getView());
            Rectangle vr = vp.getViewRect();
            return view.getScrollableUnitIncrement(vr, getOrientation(), direction);
        }
        public int getBlockIncrement(int direction) {
            JViewport vp = tableScroll.getViewport();
            Scrollable view = (Scrollable)(vp.getView());
            Rectangle vr = vp.getViewRect();
            return view.getScrollableBlockIncrement(vr, getOrientation(), direction);
        }
        public void setValues(int newValue, int newExtent, int newMin, int newMax) {
            setEnabled(newExtent < newMax);
            if (isEnabled() && !isSelectionChanging() && isTrackingEnd())
                newValue = newMax - newExtent;
            super.setValues(newValue, newExtent, newMin, newMax);
        }
    };
    tableScroll.setVerticalScrollBar(scrollBar);
    dataContainer = tableScroll;

    JLabel noDataLabel = new JLabel("<No probe selected>", JLabel.CENTER);
    noDataLabel.setEnabled(false);
    noDataContainer = new JPanel(new BorderLayout());
    noDataContainer.setOpaque(false);
    noDataContainer.add(noDataLabel, BorderLayout.CENTER);

    setOpaque(false);
    setLayout(new BorderLayout());
    add(noDataContainer, BorderLayout.CENTER);
}

javax.swing.Scrollable Java Examples