/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you 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 org.apache.pivot.wtk.skin;
import org.apache.pivot.collections.List;
import org.apache.pivot.util.Filter;
import org.apache.pivot.wtk.Component;
import org.apache.pivot.wtk.ComponentKeyListener;
import org.apache.pivot.wtk.ComponentMouseButtonListener;
import org.apache.pivot.wtk.Container;
import org.apache.pivot.wtk.ContainerMouseListener;
import org.apache.pivot.wtk.FocusTraversalDirection;
import org.apache.pivot.wtk.Display;
import org.apache.pivot.wtk.Keyboard;
import org.apache.pivot.wtk.ListButton;
import org.apache.pivot.wtk.ListButtonListener;
import org.apache.pivot.wtk.ListButtonSelectionListener;
import org.apache.pivot.wtk.ListView;
import org.apache.pivot.wtk.Mouse;
import org.apache.pivot.wtk.Window;
import org.apache.pivot.wtk.WindowStateListener;
/**
* Abstract base class for list button skins.
* <p>
* TODO Rather than blindly closing when a mouse down is received, we could
* instead cache the selection state in the popup's container mouse down event
* and compare it to the current state in component mouse down. If different,
* we close the popup. This would also tie this base class less tightly to its
* concrete subclasses.
*/
public abstract class ListButtonSkin extends ButtonSkin
implements ListButton.Skin, ListButtonListener, ListButtonSelectionListener {
protected ListView listView;
protected Window listViewPopup;
private ComponentMouseButtonListener listViewPopupMouseButtonListener = new ComponentMouseButtonListener.Adapter() {
@Override
public boolean mouseClick(Component component, Mouse.Button button, int x, int y, int count) {
ListButton listButton = (ListButton)getComponent();
listViewPopup.close();
int index = listView.getSelectedIndex();
listButton.setSelectedIndex(index);
return true;
}
};
private ComponentKeyListener listViewPopupKeyListener = new ComponentKeyListener.Adapter() {
@Override
public boolean keyPressed(Component component, int keyCode, Keyboard.KeyLocation keyLocation) {
ListButton listButton = (ListButton)getComponent();
switch (keyCode) {
case Keyboard.KeyCode.ENTER: {
listViewPopup.close();
int index = listView.getSelectedIndex();
listButton.setSelectedIndex(index);
break;
}
case Keyboard.KeyCode.TAB: {
listViewPopup.close();
int index = listView.getSelectedIndex();
listButton.setSelectedIndex(index);
FocusTraversalDirection direction = (Keyboard.isPressed(Keyboard.Modifier.SHIFT)) ?
FocusTraversalDirection.BACKWARD : FocusTraversalDirection.FORWARD;
listButton.transferFocus(direction);
break;
}
case Keyboard.KeyCode.ESCAPE: {
listViewPopup.close();
break;
}
}
return false;
}
};
private WindowStateListener listViewPopupWindowStateListener = new WindowStateListener.Adapter() {
@Override
public void windowOpened(Window window) {
Display display = window.getDisplay();
display.getContainerMouseListeners().add(displayMouseListener);
}
@Override
public void windowClosed(Window window, Display display, Window owner) {
display.getContainerMouseListeners().remove(displayMouseListener);
Window componentWindow = getComponent().getWindow();
if (componentWindow != null) {
// The list button may have been detached from the component
// hierarchy while our transition was running
componentWindow.moveToFront();
}
}
};
private ContainerMouseListener displayMouseListener = new ContainerMouseListener.Adapter() {
@Override
public boolean mouseDown(Container container, Mouse.Button button, int x, int y) {
Display display = (Display)container;
Component descendant = display.getDescendantAt(x, y);
if (!listViewPopup.isAncestor(descendant)
&& descendant != ListButtonSkin.this.getComponent()) {
listViewPopup.close();
}
return false;
}
@Override
public boolean mouseWheel(Container container, Mouse.ScrollType scrollType,
int scrollAmount, int wheelRotation, int x, int y) {
boolean consumed = false;
Display display = (Display)container;
Window window = (Window)display.getComponentAt(x, y);
if (window != listViewPopup) {
consumed = true;
}
return consumed;
}
};
protected boolean pressed = false;
public ListButtonSkin() {
listView = new ListView();
listViewPopup = new Window();
listViewPopup.getComponentMouseButtonListeners().add(listViewPopupMouseButtonListener);
listViewPopup.getComponentKeyListeners().add(listViewPopupKeyListener);
listViewPopup.getWindowStateListeners().add(listViewPopupWindowStateListener);
}
@Override
public void install(Component component) {
super.install(component);
ListButton listButton = (ListButton)component;
listButton.getListButtonListeners().add(this);
listButton.getListButtonSelectionListeners().add(this);
listView.setListData(listButton.getListData());
listView.setItemRenderer(listButton.getItemRenderer());
}
// ListButton.Skin methods
public Window getListViewPopup() {
return listViewPopup;
}
// Component state events
@Override
public void enabledChanged(Component component) {
super.enabledChanged(component);
listViewPopup.close();
pressed = false;
}
@Override
public void focusedChanged(Component component, Component obverseComponent) {
super.focusedChanged(component, obverseComponent);
// Close the popup if focus was transferred to a component whose
// window is not the popup
if (!component.isFocused()
&& !listViewPopup.containsFocus()) {
listViewPopup.close();
}
pressed = false;
}
// Component mouse events
@Override
public void mouseOut(Component component) {
super.mouseOut(component);
pressed = false;
}
@Override
public boolean mouseDown(Component component, Mouse.Button button, int x, int y) {
boolean consumed = super.mouseDown(component, button, x, y);
pressed = true;
repaintComponent();
return consumed;
}
@Override
public boolean mouseUp(Component component, Mouse.Button button, int x, int y) {
boolean consumed = super.mouseUp(component, button, x, y);
pressed = false;
repaintComponent();
return consumed;
}
@Override
public boolean mouseClick(Component component, Mouse.Button button, int x, int y, int count) {
boolean consumed = super.mouseClick(component, button, x, y, count);
ListButton listButton = (ListButton)getComponent();
listButton.requestFocus();
listButton.press();
return consumed;
}
@Override
public boolean keyPressed(Component component, int keyCode, Keyboard.KeyLocation keyLocation) {
boolean consumed = false;
if (keyCode == Keyboard.KeyCode.SPACE) {
pressed = true;
repaintComponent();
consumed = true;
} else if (keyCode == Keyboard.KeyCode.UP) {
ListButton listButton = (ListButton)getComponent();
int index = listButton.getSelectedIndex();
do {
index--;
} while (index >= 0
&& listButton.isItemDisabled(index));
if (index >= 0) {
listButton.setSelectedIndex(index);
consumed = true;
}
} else if (keyCode == Keyboard.KeyCode.DOWN) {
ListButton listButton = (ListButton)getComponent();
int index = listButton.getSelectedIndex();
int count = listButton.getListData().getLength();
do {
index++;
} while (index < count
&& listView.isItemDisabled(index));
if (index < count) {
listButton.setSelectedIndex(index);
consumed = true;
}
} else {
consumed = super.keyPressed(component, keyCode, keyLocation);
}
return consumed;
}
@Override
public boolean keyReleased(Component component, int keyCode, Keyboard.KeyLocation keyLocation) {
boolean consumed = false;
ListButton listButton = (ListButton)getComponent();
if (keyCode == Keyboard.KeyCode.SPACE) {
pressed = false;
repaintComponent();
listButton.press();
} else {
consumed = super.keyReleased(component, keyCode, keyLocation);
}
return consumed;
}
@Override
public boolean keyTyped(Component component, char character) {
boolean consumed = super.keyTyped(component, character);
ListButton listButton = (ListButton)getComponent();
List<?> listData = listButton.getListData();
ListView.ItemRenderer itemRenderer = listButton.getItemRenderer();
character = Character.toUpperCase(character);
for (int i = listButton.getSelectedIndex() + 1, n = listData.getLength(); i < n; i++) {
if (!listButton.isItemDisabled(i)) {
String string = itemRenderer.toString(listData.get(i));
if (string != null
&& string.length() > 0) {
char first = Character.toUpperCase(string.charAt(0));
if (first == character) {
listButton.setSelectedIndex(i);
consumed = true;
break;
}
}
}
}
return consumed;
}
// List button events
@Override
public void listDataChanged(ListButton listButton, List<?> previousListData) {
listButton.setButtonData(null);
listView.setListData(listButton.getListData());
invalidateComponent();
}
@Override
public void itemRendererChanged(ListButton listButton, ListView.ItemRenderer previousItemRenderer) {
listView.setItemRenderer(listButton.getItemRenderer());
}
@Override
public void disabledItemFilterChanged(ListButton listButton, Filter<?> previousDisabledItemFilter) {
listView.setDisabledItemFilter(listButton.getDisabledItemFilter());
}
@Override
public void listSizeChanged(ListButton listButton, int previousListSize) {
// No-op
}
// List button selection events
@Override
public void selectedIndexChanged(ListButton listButton, int previousSelectedIndex) {
// Set the selected item as the button data
int selectedIndex = listButton.getSelectedIndex();
Object buttonData = (selectedIndex == -1) ? null : listButton.getListData().get(selectedIndex);
listButton.setButtonData(buttonData);
listView.setSelectedIndex(selectedIndex);
}
}