| Methods Summary |
|---|
| protected javax.swing.event.ChangeListener | createHSBChangeListener()
return getHandler();
|
| private java.beans.PropertyChangeListener | createHSBPropertyChangeListener()Returns a PropertyChangeListener that will be installed
on the horizontal JScrollBar.
return getHandler();
|
| protected java.awt.event.MouseWheelListener | createMouseWheelListener()Creates an instance of MouseWheelListener, which is added to the
JScrollPane by installUI(). The returned MouseWheelListener is used
to handle mouse wheel-driven scrolling.
return getHandler();
|
| protected java.beans.PropertyChangeListener | createPropertyChangeListener()Creates an instance of PropertyChangeListener that's added to
the JScrollPane by installUI(). Subclasses can override this method
to return a custom PropertyChangeListener, e.g.
class MyScrollPaneUI extends BasicScrollPaneUI {
protected PropertyChangeListener createPropertyChangeListener() {
return new MyPropertyChangeListener();
}
public class MyPropertyChangeListener extends PropertyChangeListener {
public void propertyChange(PropertyChangeEvent e) {
if (e.getPropertyName().equals("viewport")) {
// do some extra work when the viewport changes
}
super.propertyChange(e);
}
}
}
return getHandler();
|
| public static javax.swing.plaf.ComponentUI | createUI(javax.swing.JComponent x)
return new BasicScrollPaneUI();
|
| protected javax.swing.event.ChangeListener | createVSBChangeListener()
return getHandler();
|
| private java.beans.PropertyChangeListener | createVSBPropertyChangeListener()Returns a PropertyChangeListener that will be installed
on the vertical JScrollBar.
return getHandler();
|
| protected javax.swing.event.ChangeListener | createViewportChangeListener()
return getHandler();
|
| public int | getBaseline(javax.swing.JComponent c, int width, int height)Returns the baseline.
JViewport viewport = scrollpane.getViewport();
Insets spInsets = scrollpane.getInsets();
int y = spInsets.top;
height = height - spInsets.top - spInsets.bottom;
width = width - spInsets.left - spInsets.right;
JViewport columnHeader = scrollpane.getColumnHeader();
if (columnHeader != null && columnHeader.isVisible()) {
Component header = columnHeader.getView();
if (header != null && header.isVisible()) {
// Header is always given it's preferred size.
Dimension headerPref = header.getPreferredSize();
int baseline = header.getBaseline(headerPref.width,
headerPref.height);
if (baseline >= 0) {
return y + baseline;
}
}
Dimension columnPref = columnHeader.getPreferredSize();
height -= columnPref.height;
y += columnPref.height;
}
Component view = (viewport == null) ? null : viewport.getView();
if (view != null && view.isVisible() &&
view.getBaselineResizeBehavior() ==
Component.BaselineResizeBehavior.CONSTANT_ASCENT) {
Border viewportBorder = scrollpane.getViewportBorder();
if (viewportBorder != null) {
Insets vpbInsets = viewportBorder.getBorderInsets(scrollpane);
y += vpbInsets.top;
height = height - vpbInsets.top - vpbInsets.bottom;
width = width - vpbInsets.left - vpbInsets.right;
}
if (view.getWidth() > 0 && view.getHeight() > 0) {
Dimension min = view.getMinimumSize();
width = Math.max(min.width, view.getWidth());
height = Math.max(min.height, view.getHeight());
}
if (width > 0 && height > 0) {
int baseline = view.getBaseline(width, height);
if (baseline > 0) {
return y + baseline;
}
}
}
return -1;
|
| public java.awt.Component$BaselineResizeBehavior | getBaselineResizeBehavior(javax.swing.JComponent c)Returns an enum indicating how the baseline of the component
changes as the size changes.
super.getBaselineResizeBehavior(c);
// Baseline is either from the header, in which case it's always
// the same size and therefor can be created as CONSTANT_ASCENT.
// If the header doesn't have a baseline than the baseline will only
// be valid if it's BaselineResizeBehavior is
// CONSTANT_ASCENT, so, return CONSTANT_ASCENT.
return Component.BaselineResizeBehavior.CONSTANT_ASCENT;
|
| private javax.swing.plaf.basic.BasicScrollPaneUI$Handler | getHandler()
if (handler == null) {
handler = new Handler();
}
return handler;
|
| javax.swing.InputMap | getInputMap(int condition)
if (condition == JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT) {
InputMap keyMap = (InputMap)DefaultLookup.get(scrollpane, this,
"ScrollPane.ancestorInputMap");
InputMap rtlKeyMap;
if (scrollpane.getComponentOrientation().isLeftToRight() ||
((rtlKeyMap = (InputMap)DefaultLookup.get(scrollpane, this,
"ScrollPane.ancestorInputMap.RightToLeft")) == null)) {
return keyMap;
} else {
rtlKeyMap.setParent(keyMap);
return rtlKeyMap;
}
}
return null;
|
| public java.awt.Dimension | getMaximumSize(javax.swing.JComponent c)
return new Dimension(Short.MAX_VALUE, Short.MAX_VALUE);
|
| protected void | installDefaults(javax.swing.JScrollPane scrollpane)
LookAndFeel.installBorder(scrollpane, "ScrollPane.border");
LookAndFeel.installColorsAndFont(scrollpane,
"ScrollPane.background",
"ScrollPane.foreground",
"ScrollPane.font");
Border vpBorder = scrollpane.getViewportBorder();
if ((vpBorder == null) ||( vpBorder instanceof UIResource)) {
vpBorder = UIManager.getBorder("ScrollPane.viewportBorder");
scrollpane.setViewportBorder(vpBorder);
}
LookAndFeel.installProperty(scrollpane, "opaque", Boolean.TRUE);
|
| protected void | installKeyboardActions(javax.swing.JScrollPane c)
InputMap inputMap = getInputMap(JComponent.
WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
SwingUtilities.replaceUIInputMap(c, JComponent.
WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, inputMap);
LazyActionMap.installLazyActionMap(c, BasicScrollPaneUI.class,
"ScrollPane.actionMap");
|
| protected void | installListeners(javax.swing.JScrollPane c)
vsbChangeListener = createVSBChangeListener();
vsbPropertyChangeListener = createVSBPropertyChangeListener();
hsbChangeListener = createHSBChangeListener();
hsbPropertyChangeListener = createHSBPropertyChangeListener();
viewportChangeListener = createViewportChangeListener();
spPropertyChangeListener = createPropertyChangeListener();
JViewport viewport = scrollpane.getViewport();
JScrollBar vsb = scrollpane.getVerticalScrollBar();
JScrollBar hsb = scrollpane.getHorizontalScrollBar();
if (viewport != null) {
viewport.addChangeListener(viewportChangeListener);
}
if (vsb != null) {
vsb.getModel().addChangeListener(vsbChangeListener);
vsb.addPropertyChangeListener(vsbPropertyChangeListener);
}
if (hsb != null) {
hsb.getModel().addChangeListener(hsbChangeListener);
hsb.addPropertyChangeListener(hsbPropertyChangeListener);
}
scrollpane.addPropertyChangeListener(spPropertyChangeListener);
mouseScrollListener = createMouseWheelListener();
scrollpane.addMouseWheelListener(mouseScrollListener);
|
| public void | installUI(javax.swing.JComponent x)
scrollpane = (JScrollPane)x;
installDefaults(scrollpane);
installListeners(scrollpane);
installKeyboardActions(scrollpane);
|
| static void | loadActionMap(javax.swing.plaf.basic.LazyActionMap map)
map.put(new Actions(Actions.SCROLL_UP));
map.put(new Actions(Actions.SCROLL_DOWN));
map.put(new Actions(Actions.SCROLL_HOME));
map.put(new Actions(Actions.SCROLL_END));
map.put(new Actions(Actions.UNIT_SCROLL_UP));
map.put(new Actions(Actions.UNIT_SCROLL_DOWN));
map.put(new Actions(Actions.SCROLL_LEFT));
map.put(new Actions(Actions.SCROLL_RIGHT));
map.put(new Actions(Actions.UNIT_SCROLL_RIGHT));
map.put(new Actions(Actions.UNIT_SCROLL_LEFT));
|
| public void | paint(java.awt.Graphics g, javax.swing.JComponent c)
Border vpBorder = scrollpane.getViewportBorder();
if (vpBorder != null) {
Rectangle r = scrollpane.getViewportBorderBounds();
vpBorder.paintBorder(scrollpane, g, r.x, r.y, r.width, r.height);
}
|
| protected void | syncScrollPaneWithViewport()
JViewport viewport = scrollpane.getViewport();
JScrollBar vsb = scrollpane.getVerticalScrollBar();
JScrollBar hsb = scrollpane.getHorizontalScrollBar();
JViewport rowHead = scrollpane.getRowHeader();
JViewport colHead = scrollpane.getColumnHeader();
boolean ltr = scrollpane.getComponentOrientation().isLeftToRight();
if (viewport != null) {
Dimension extentSize = viewport.getExtentSize();
Dimension viewSize = viewport.getViewSize();
Point viewPosition = viewport.getViewPosition();
if (vsb != null) {
int extent = extentSize.height;
int max = viewSize.height;
int value = Math.max(0, Math.min(viewPosition.y, max - extent));
vsb.setValues(value, extent, 0, max);
}
if (hsb != null) {
int extent = extentSize.width;
int max = viewSize.width;
int value;
if (ltr) {
value = Math.max(0, Math.min(viewPosition.x, max - extent));
} else {
int currentValue = hsb.getValue();
/* Use a particular formula to calculate "value"
* until effective x coordinate is calculated.
*/
if (setValueCalled && ((max - currentValue) == viewPosition.x)) {
value = Math.max(0, Math.min(max - extent, currentValue));
/* After "extent" is set, turn setValueCalled flag off.
*/
if (extent != 0) {
setValueCalled = false;
}
} else {
if (extent > max) {
viewPosition.x = max - extent;
viewport.setViewPosition(viewPosition);
value = 0;
} else {
/* The following line can't handle a small value of
* viewPosition.x like Integer.MIN_VALUE correctly
* because (max - extent - viewPositoiin.x) causes
* an overflow. As a result, value becomes zero.
* (e.g. setViewPosition(Integer.MAX_VALUE, ...)
* in a user program causes a overflow.
* Its expected value is (max - extent).)
* However, this seems a trivial bug and adding a
* fix makes this often-called method slow, so I'll
* leave it until someone claims.
*/
value = Math.max(0, Math.min(max - extent, max - extent - viewPosition.x));
}
}
}
hsb.setValues(value, extent, 0, max);
}
if (rowHead != null) {
Point p = rowHead.getViewPosition();
p.y = viewport.getViewPosition().y;
p.x = 0;
rowHead.setViewPosition(p);
}
if (colHead != null) {
Point p = colHead.getViewPosition();
if (ltr) {
p.x = viewport.getViewPosition().x;
} else {
p.x = Math.max(0, viewport.getViewPosition().x);
}
p.y = 0;
colHead.setViewPosition(p);
}
}
|
| protected void | uninstallDefaults(javax.swing.JScrollPane c)
LookAndFeel.uninstallBorder(scrollpane);
if (scrollpane.getViewportBorder() instanceof UIResource) {
scrollpane.setViewportBorder(null);
}
|
| protected void | uninstallKeyboardActions(javax.swing.JScrollPane c)
SwingUtilities.replaceUIActionMap(c, null);
SwingUtilities.replaceUIInputMap(c, JComponent.
WHEN_ANCESTOR_OF_FOCUSED_COMPONENT, null);
|
| protected void | uninstallListeners(javax.swing.JComponent c)
JViewport viewport = scrollpane.getViewport();
JScrollBar vsb = scrollpane.getVerticalScrollBar();
JScrollBar hsb = scrollpane.getHorizontalScrollBar();
if (viewport != null) {
viewport.removeChangeListener(viewportChangeListener);
}
if (vsb != null) {
vsb.getModel().removeChangeListener(vsbChangeListener);
vsb.removePropertyChangeListener(vsbPropertyChangeListener);
}
if (hsb != null) {
hsb.getModel().removeChangeListener(hsbChangeListener);
hsb.removePropertyChangeListener(hsbPropertyChangeListener);
}
scrollpane.removePropertyChangeListener(spPropertyChangeListener);
if (mouseScrollListener != null) {
scrollpane.removeMouseWheelListener(mouseScrollListener);
}
vsbChangeListener = null;
hsbChangeListener = null;
viewportChangeListener = null;
spPropertyChangeListener = null;
mouseScrollListener = null;
handler = null;
|
| public void | uninstallUI(javax.swing.JComponent c)
uninstallDefaults(scrollpane);
uninstallListeners(scrollpane);
uninstallKeyboardActions(scrollpane);
scrollpane = null;
|
| protected void | updateColumnHeader(java.beans.PropertyChangeEvent e)
JViewport newColHead = (JViewport)(e.getNewValue());
if (newColHead != null) {
JViewport viewport = scrollpane.getViewport();
Point p = newColHead.getViewPosition();
if (viewport == null) {
p.x = 0;
} else {
if (scrollpane.getComponentOrientation().isLeftToRight()) {
p.x = viewport.getViewPosition().x;
} else {
p.x = Math.max(0, viewport.getViewPosition().x);
}
}
newColHead.setViewPosition(p);
scrollpane.add(newColHead, COLUMN_HEADER);
}
|
| private void | updateHorizontalScrollBar(java.beans.PropertyChangeEvent pce)
updateScrollBar(pce, hsbChangeListener, hsbPropertyChangeListener);
|
| protected void | updateRowHeader(java.beans.PropertyChangeEvent e)
JViewport newRowHead = (JViewport)(e.getNewValue());
if (newRowHead != null) {
JViewport viewport = scrollpane.getViewport();
Point p = newRowHead.getViewPosition();
p.y = (viewport != null) ? viewport.getViewPosition().y : 0;
newRowHead.setViewPosition(p);
}
|
| private void | updateScrollBar(java.beans.PropertyChangeEvent pce, javax.swing.event.ChangeListener cl, java.beans.PropertyChangeListener pcl)
JScrollBar sb = (JScrollBar)pce.getOldValue();
if (sb != null) {
if (cl != null) {
sb.getModel().removeChangeListener(cl);
}
if (pcl != null) {
sb.removePropertyChangeListener(pcl);
}
}
sb = (JScrollBar)pce.getNewValue();
if (sb != null) {
if (cl != null) {
sb.getModel().addChangeListener(cl);
}
if (pcl != null) {
sb.addPropertyChangeListener(pcl);
}
}
|
| protected void | updateScrollBarDisplayPolicy(java.beans.PropertyChangeEvent e)
scrollpane.revalidate();
scrollpane.repaint();
|
| private void | updateVerticalScrollBar(java.beans.PropertyChangeEvent pce)
updateScrollBar(pce, vsbChangeListener, vsbPropertyChangeListener);
|
| protected void | updateViewport(java.beans.PropertyChangeEvent e)
JViewport oldViewport = (JViewport)(e.getOldValue());
JViewport newViewport = (JViewport)(e.getNewValue());
if (oldViewport != null) {
oldViewport.removeChangeListener(viewportChangeListener);
}
if (newViewport != null) {
Point p = newViewport.getViewPosition();
if (scrollpane.getComponentOrientation().isLeftToRight()) {
p.x = Math.max(p.x, 0);
} else {
int max = newViewport.getViewSize().width;
int extent = newViewport.getExtentSize().width;
if (extent > max) {
p.x = max - extent;
} else {
p.x = Math.max(0, Math.min(max - extent, p.x));
}
}
p.y = Math.max(p.y, 0);
newViewport.setViewPosition(p);
newViewport.addChangeListener(viewportChangeListener);
}
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