/*
* Copyright 2008-2017 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package griffon.core.view;
import griffon.core.GriffonApplication;
import griffon.core.ShutdownHandler;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.util.Collection;
import java.util.Set;
/**
* Controls a set of windows that belong to the application.<p>
* Windows that are controlled by a WindowManager can be shown/hidden
* using a custom strategy ({@code WindowDisplayHandler})
*
* @author Andres Almiray
* @since 2.0.0
*/
public interface WindowManager<W> extends ShutdownHandler {
/**
* Finds a Window by name.
*
* @param name the value of the of the Window's name
* @return a Window if a match is found, null otherwise.
*/
@Nullable
W findWindow(@Nonnull String name);
/**
* Convenience method to get a managed Window by index.<p>
* Follows the Groovy conventions for overriding the [] operator.
*
* @param index the index of the Window to be retrieved
* @return the Window found at the specified index
* @throws ArrayIndexOutOfBoundsException if the index is invalid (below 0 or greater than the size
* of the managed windows list)
*/
@Nullable
W getAt(int index);
/**
* Finds the Window that should be displayed during the Ready phase of an application.<p>
* The WindowManager expects a configuration flag <code>windowManager.startingWindow</code> to be
* present in order to determine which Window will be displayed during the Ready phase. If no configuration
* is found the WindowManager will pick the first Window found in the list of managed windows.<p>
* The configuration flag accepts two value types:<ul>
* <li>a String that defines the name of the Window. You must make sure the Window has a matching name property.</li>
* <li>a Number that defines the index of the Window in the list of managed windows.</li>
* </ul>
*
* @return a Window that matches the given criteria or null if no match is found.
*/
@Nullable
W getStartingWindow();
/**
* Returns the collection of windows managed by this manager.
*
* @return a Collection of currently managed windows
*/
@Nonnull
Collection<W> getWindows();
/**
* Returns a set of names related to all windows managed by this manager.
*
* @return a Set of managed window names
* @since 2.3.0
*/
@Nonnull
Set<String> getWindowNames();
/**
* Lookups a name related to a Window.
*
* @param window the window to be looked up
* @return the name of the window if it's managed by this manager, <tt>null</tt> otherwise.
* @since 2.3.0
*/
@Nullable
String findWindowName(@Nonnull W window);
/**
* Lookups the index related to a Window.
*
* @param window the window to be looked up
* @return the index of the window if it's managed by this manager, <tt>-1</tt> otherwise.
* @since 2.3.0
*/
int indexOf(@Nonnull W window);
/**
* Registers a window on this manager if an only if the window is not null
* and it's not registered already.
*
* @param name the value of the of the Window's name
* @param window the window to be added to the list of managed windows
*/
void attach(@Nonnull String name, @Nonnull W window);
/**
* Removes the window from the list of manages windows if and only if it
* is registered with this manager.
*
* @param name the value of the of the Window's name
*/
void detach(@Nonnull String name);
/**
* Shows the window.<p>
* This method is executed <b>SYNCHRONOUSLY</b> in the UI thread.
*
* @param window the window to show
*/
void show(@Nonnull W window);
/**
* Shows the window.<p>
* This method is executed <b>SYNCHRONOUSLY</b> in the UI thread.
*
* @param name the name of window to show
*/
void show(@Nonnull String name);
/**
* Hides the window.<p>
* This method is executed <b>SYNCHRONOUSLY</b> in the UI thread.
*
* @param window the window to hide
*/
void hide(@Nonnull W window);
/**
* Hides the window.<p>
* This method is executed <b>SYNCHRONOUSLY</b> in the UI thread.
*
* @param name the name of window to hide
*/
void hide(@Nonnull String name);
boolean canShutdown(@Nonnull GriffonApplication app);
/**
* Hides all visible windows
*/
void onShutdown(@Nonnull GriffonApplication app);
/**
* Counts how many Windows are visible regardless of their attached status to this WindowManager.
*
* @return the number of visible Windows
*/
int countVisibleWindows();
/**
* Returns the value of the "application.autoShutdown" configuration flag.
*
* @return the value of the "application.autoShutdown" configuration flag.
*/
boolean isAutoShutdown();
}