org.icepdf.ri.util.jxlayer.plaf.LayerUI Maven / Gradle / Ivy
/**
* Copyright (c) 2006-2008, Alexander Potochkin
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of the JXLayer project nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.icepdf.ri.util.jxlayer.plaf;
import org.icepdf.ri.util.jxlayer.JXLayer;
import javax.swing.*;
import javax.swing.plaf.ComponentUI;
import java.awt.*;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.io.Serializable;
/**
* The base class for all {@link JXLayer}'s UI delegates.
*
* {@link #paint(java.awt.Graphics, javax.swing.JComponent)} method performes the
* painting of the {@code JXLayer}
* and {@link #eventDispatched(AWTEvent, JXLayer)} method is notified
* about any {@code AWTEvent}s which have been generated by a {@code JXLayer}
* or any of its subcomponents.
*
* The {@code LayerUI} is different from UI delegates of the other components,
* because it is LookAndFeel independent and is not updated by default when
* the system LookAndFeel is changed.
*
* The subclasses of {@code LayerUI} can either be stateless and shareable
* by multiple {@code JXLayer}s or not shareable.
*
* @param one of the super types of {@code JXLayer}'s view component
* @author Alexander Potochkin
* @see JXLayer#setUI(LayerUI)
* @see JXLayer#setView(Component)
* @see JXLayer#getView()
*/
public abstract class LayerUI
extends ComponentUI implements Serializable {
private final PropertyChangeSupport propertyChangeSupport =
new PropertyChangeSupport(this);
/**
* Paints the specified component.
* Subclasses should override this method and use
* the specified {@code Graphics} object to
* render the content of the component.
*
* @param g the {@code Graphics} context in which to paint;
* @param c the component being painted;
* it can be safely cast to the {@code JXLayer}
*/
@Override
public void paint(Graphics g, JComponent c) {
c.paint(g);
}
/**
* Dispatches {@code AWTEvent}s for {@code JXLayer}
* and all it subcomponents to this {@code LayerUI}.
*
* To enable the {@code AWTEvent} of particular type,
* you should call {@link JXLayer#setLayerEventMask}
* in {@link #installUI(javax.swing.JComponent)}
* and set the layer event mask to {@code 0}
* in {@link #uninstallUI(javax.swing.JComponent)} after that
*
* @param e the event to be dispatched
* @param l the layer this LayerUI is set to
* @see JXLayer#setLayerEventMask(long)
* @see JXLayer#getLayerEventMask()
*/
public void eventDispatched(AWTEvent e, JXLayer l) {
}
/**
* Invoked when {@link JXLayer#updateUI()} is called
* from the {@code JXLayer} this {@code LayerUI} is set to.
*
* @param l the {@code JXLayer} which UI is updated
*/
public void updateUI(JXLayer l) {
}
/**
* Configures the {@code JXLayer} this {@code LayerUI} is set to.
* The default implementation registers the {@code LayerUI}
* as a property change listener for the passed {@code JXLayer}
*
* @param c the {@code JXLayer} where this UI delegate is being installed
*/
public void installUI(JComponent c) {
addPropertyChangeListener((JXLayer) c);
}
/**
* {@inheritDoc}
*/
public void uninstallUI(JComponent c) {
removePropertyChangeListener((JXLayer) c);
}
/**
* Adds a PropertyChangeListener to the listener list. The listener is
* registered for all bound properties of this class.
*
* If listener is null,
* no exception is thrown and no action is performed.
*
* @param listener the property change listener to be added
* @see #removePropertyChangeListener
* @see #getPropertyChangeListeners
* @see #addPropertyChangeListener(String, java.beans.PropertyChangeListener)
*/
public void addPropertyChangeListener(PropertyChangeListener listener) {
propertyChangeSupport.addPropertyChangeListener(listener);
}
/**
* Removes a PropertyChangeListener from the listener list. This method
* should be used to remove PropertyChangeListeners that were registered
* for all bound properties of this class.
*
* If listener is null, no exception is thrown and no action is performed.
*
* @param listener the PropertyChangeListener to be removed
* @see #addPropertyChangeListener
* @see #getPropertyChangeListeners
* @see #removePropertyChangeListener(String, PropertyChangeListener)
*/
public void removePropertyChangeListener(PropertyChangeListener listener) {
propertyChangeSupport.removePropertyChangeListener(listener);
}
/**
* Returns an array of all the property change listeners
* registered on this component.
*
* @return all of this ui's PropertyChangeListeners
* or an empty array if no property change
* listeners are currently registered
* @see #addPropertyChangeListener
* @see #removePropertyChangeListener
* @see #getPropertyChangeListeners(String)
*/
public PropertyChangeListener[] getPropertyChangeListeners() {
return propertyChangeSupport.getPropertyChangeListeners();
}
/**
* Adds a PropertyChangeListener to the listener list for a specific
* property.
*
* If propertyName or listener is null,
* no exception is thrown and no action is taken.
*
* @param propertyName one of the property names listed above
* @param listener the property change listener to be added
* @see #removePropertyChangeListener(String, PropertyChangeListener)
* @see #getPropertyChangeListeners(String)
* @see #addPropertyChangeListener(String, PropertyChangeListener)
*/
public void addPropertyChangeListener(String propertyName,
PropertyChangeListener listener) {
propertyChangeSupport.addPropertyChangeListener(propertyName, listener);
}
/**
* Removes a PropertyChangeListener from the listener
* list for a specific property. This method should be used to remove
* PropertyChangeListeners
* that were registered for a specific bound property.
*
* If propertyName or listener is null,
* no exception is thrown and no action is taken.
*
* @param propertyName a valid property name
* @param listener the PropertyChangeListener to be removed
* @see #addPropertyChangeListener(String, PropertyChangeListener)
* @see #getPropertyChangeListeners(String)
* @see #removePropertyChangeListener(PropertyChangeListener)
*/
public void removePropertyChangeListener(String propertyName,
PropertyChangeListener listener) {
propertyChangeSupport.removePropertyChangeListener(propertyName, listener);
}
/**
* Returns an array of all the listeners which have been associated
* with the named property.
*
* @return all of the PropertyChangeListeners associated with
* the named property; if no such listeners have been added or
* if propertyName is null, an empty
* array is returned
* @see #addPropertyChangeListener(String, PropertyChangeListener)
* @see #removePropertyChangeListener(String, PropertyChangeListener)
* @see #getPropertyChangeListeners
*/
public PropertyChangeListener[] getPropertyChangeListeners(String propertyName) {
return propertyChangeSupport.getPropertyChangeListeners(propertyName);
}
/**
* Support for reporting bound property changes for Object properties.
* This method can be called when a bound property has changed and it will
* send the appropriate PropertyChangeEvent to any registered
* PropertyChangeListeners.
*
* @param propertyName the property whose value has changed
* @param oldValue the property's previous value
* @param newValue the property's new value
*/
protected void firePropertyChange(String propertyName,
Object oldValue, Object newValue) {
propertyChangeSupport.firePropertyChange(propertyName, oldValue, newValue);
}
/**
* Notifies the {@code LayerUI} when any of its property is changed
* and allows to update every {@code JXLayer} this {@code LayerUI} is set to.
*
* @param evt the PropertyChangeEvent generated by this {@code LayerUI}
* @param l the {@code JXLayer} this LayerUI is set to
*/
public void handlePropertyChangeEvent(PropertyChangeEvent evt, JXLayer l) {
}
/**
* Returns the preferred size of the viewport for a view component.
*
* @return the preferred size of the viewport for a view component
* @see Scrollable#getPreferredScrollableViewportSize ()
*/
public Dimension getPreferredScrollableViewportSize(JXLayer l) {
if (l.getView() instanceof Scrollable) {
return ((Scrollable) l.getView()).getPreferredScrollableViewportSize();
}
return l.getPreferredSize();
}
/**
* Components that display logical rows or columns should compute
* the scroll increment that will completely expose one block
* of rows or columns, depending on the value of orientation.
*
* @return the "block" increment for scrolling in the specified direction
* @see Scrollable#getScrollableBlockIncrement(Rectangle, int, int)
*/
public int getScrollableBlockIncrement(JXLayer l,
Rectangle visibleRect,
int orientation, int direction) {
if (l.getView() instanceof Scrollable) {
return ((Scrollable) l.getView()).getScrollableBlockIncrement(
visibleRect, orientation, direction);
}
return (orientation == SwingConstants.VERTICAL) ? visibleRect.height :
visibleRect.width;
}
/**
* Returns false to indicate that the height of the viewport does not
* determine the height of the layer, unless the preferred height
* of the layer is smaller than the viewports height.
*
* @return whether the layer should track the height of the viewport
* @see Scrollable#getScrollableTracksViewportHeight()
*/
public boolean getScrollableTracksViewportHeight(JXLayer l) {
if (l.getView() instanceof Scrollable) {
return ((Scrollable) l.getView()).getScrollableTracksViewportHeight();
}
if (l.getParent() instanceof JViewport) {
return (((JViewport) l.getParent()).getHeight() > l.getPreferredSize().height);
}
return false;
}
/**
* Returns false to indicate that the width of the viewport does not
* determine the width of the layer, unless the preferred width
* of the layer is smaller than the viewports width.
*
* @return whether the layer should track the width of the viewport
* @see Scrollable
* @see LayerUI#getScrollableTracksViewportWidth(JXLayer)
*/
public boolean getScrollableTracksViewportWidth(JXLayer l) {
if (l.getView() instanceof Scrollable) {
return ((Scrollable) l.getView()).getScrollableTracksViewportWidth();
}
if (l.getParent() instanceof JViewport) {
return (((JViewport) l.getParent()).getWidth() > l.getPreferredSize().width);
}
return false;
}
/**
* Components that display logical rows or columns should compute
* the scroll increment that will completely expose one new row
* or column, depending on the value of orientation. Ideally,
* components should handle a partially exposed row or column by
* returning the distance required to completely expose the item.
*
* Scrolling containers, like JScrollPane, will use this method
* each time the user requests a unit scroll.
*
* @return The "unit" increment for scrolling in the specified direction.
* This value should always be positive.
* @see Scrollable#getScrollableUnitIncrement(Rectangle, int, int)
*/
public int getScrollableUnitIncrement(JXLayer l,
Rectangle visibleRect,
int orientation, int direction) {
if (l.getView() instanceof Scrollable) {
return ((Scrollable) l.getView()).getScrollableUnitIncrement(
visibleRect, orientation, direction);
}
return 1;
}
}
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