org.scijava.display.Display Maven / Gradle / Ivy
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package org.scijava.display;
import java.util.List;
import org.scijava.Named;
import org.scijava.plugin.Plugin;
import org.scijava.plugin.RichPlugin;
/**
* A display is a particular type of plugin intended to collect objects for
* visualization. For example, a {@link TextDisplay} displays {@link String}s.
*
* Displays discoverable at runtime must implement this interface and be
* annotated with @{@link Plugin} with attribute {@link Plugin#type()} =
* {@link Display}.class. While it possible to create a display merely by
* implementing this interface, it is encouraged to instead extend
* {@link AbstractDisplay}, for convenience.
*
*
* @author Curtis Rueden
* @author Grant Harris
* @see Plugin
* @see DisplayService
*/
public interface Display extends List, RichPlugin, Named {
/**
* Tests whether the display is capable of visualizing objects of the given
* class.
*
* @param c The class to check for visualization capabilities.
* @return True if the display can handle certain objects of the given class;
* false if it cannot visualize any objects of that class.
*/
boolean canDisplay(Class c);
/** Tests whether the display is capable of visualizing the given object. */
default boolean canDisplay(final Object o) {
if (o == null) return false;
return canDisplay(o.getClass());
}
/**
* Displays the given object in this display.
*
* This method is essentially the same as {@link #add} except that it accepts
* any {@link Object} regardless of type.
*
*
* @throws IllegalArgumentException if the object cannot be displayed (i.e.,
* if {@link #canDisplay(Object)} returns false).
*/
void display(Object o);
/**
* Tests whether the display is currently visualizing the given object.
*
* Note that this method may behave differently than {@link #contains}; in
* general, any time {@link #contains} returns true, this method will also
* return true, but not vice versa. For example, in ImageJ, an
* {@code ImageDisplay} is a {@code Display} but calling
* {@code isDisplaying} on a {@code Dataset} (which is not a {@code DataView})
* will return true if the {@code ImageDisplay} currently contains a
* {@code DatasetView} that wraps that {@code Dataset}.
*
*/
default boolean isDisplaying(final Object o) {
return contains(o);
}
/** Updates and redraws the display onscreen. */
void update();
/** Closes the display and disposes its resources. */
void close();
}