| /* |
| * 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; |
| |
| import org.apache.pivot.collections.Dictionary; |
| import org.apache.pivot.util.ListenerList; |
| |
| /** |
| * Allows a user to select one of a range of values. |
| */ |
| public class Slider extends Container { |
| private static class SliderListenerList extends WTKListenerList<SliderListener> implements |
| SliderListener { |
| @Override |
| public void orientationChanged(Slider slider) { |
| for (SliderListener listener : this) { |
| listener.orientationChanged(slider); |
| } |
| } |
| |
| @Override |
| public void rangeChanged(Slider slider, int previousStart, int previousEnd) { |
| for (SliderListener listener : this) { |
| listener.rangeChanged(slider, previousStart, previousEnd); |
| } |
| } |
| } |
| |
| private static class SliderValueListenerList extends WTKListenerList<SliderValueListener> |
| implements SliderValueListener { |
| @Override |
| public void valueChanged(Slider slider, int previousValue) { |
| for (SliderValueListener listener : this) { |
| listener.valueChanged(slider, previousValue); |
| } |
| } |
| } |
| |
| private int start = DEFAULT_START; |
| private int end = DEFAULT_END; |
| private int value = DEFAULT_VALUE; |
| private Orientation orientation = null; |
| |
| private SliderListenerList sliderListeners = new SliderListenerList(); |
| private SliderValueListenerList sliderValueListeners = new SliderValueListenerList(); |
| |
| public static final int DEFAULT_START = 0; |
| public static final int DEFAULT_END = 100; |
| public static final int DEFAULT_VALUE = 0; |
| |
| public Slider() { |
| this(Orientation.HORIZONTAL); |
| } |
| |
| public Slider(Orientation orientation) { |
| this.orientation = orientation; |
| |
| installSkin(Slider.class); |
| } |
| |
| public int getStart() { |
| return start; |
| } |
| |
| public void setStart(int start) { |
| setRange(start, end); |
| } |
| |
| public int getEnd() { |
| return end; |
| } |
| |
| public void setEnd(int end) { |
| setRange(start, end); |
| } |
| |
| public void setRange(int start, int end) { |
| if (start > end) { |
| throw new IllegalArgumentException("start " + start + " is greater than maximum " + end |
| + "."); |
| } |
| |
| int previousStart = this.start; |
| int previousEnd = this.end; |
| int previousValue = this.value; |
| |
| if (start != previousStart || end != previousEnd) { |
| this.start = start; |
| if (value < start) { |
| this.value = start; |
| } |
| |
| this.end = end; |
| if (value > end) { |
| this.value = end; |
| } |
| |
| sliderListeners.rangeChanged(this, previousStart, previousEnd); |
| |
| if (previousValue < start || previousValue > end) { |
| sliderValueListeners.valueChanged(this, previousValue); |
| } |
| } |
| } |
| |
| public final void setRange(Span range) { |
| if (range == null) { |
| throw new IllegalArgumentException("range is null."); |
| } |
| |
| setRange(range.start, range.end); |
| } |
| |
| public final void setRange(Dictionary<String, ?> range) { |
| if (range == null) { |
| throw new IllegalArgumentException("range is null."); |
| } |
| |
| setRange(new Span(range)); |
| } |
| |
| public final void setRange(String range) { |
| if (range == null) { |
| throw new IllegalArgumentException("range is null."); |
| } |
| |
| setRange(Span.decode(range)); |
| } |
| |
| public int getValue() { |
| return value; |
| } |
| |
| public void setValue(int value) { |
| if (value < start) { |
| throw new IllegalArgumentException("value " + value + " is less than minimum " + start |
| + "."); |
| } |
| |
| if (value > end) { |
| throw new IllegalArgumentException("value " + value + " is greater than maximum " + end |
| + "."); |
| } |
| |
| int previousValue = this.value; |
| |
| if (value != previousValue) { |
| this.value = value; |
| sliderValueListeners.valueChanged(this, previousValue); |
| } |
| } |
| |
| public Orientation getOrientation() { |
| return orientation; |
| } |
| |
| public void setOrientation(Orientation orientation) { |
| if (orientation == null) { |
| throw new IllegalArgumentException("orientation is null."); |
| } |
| |
| if (this.orientation != orientation) { |
| this.orientation = orientation; |
| sliderListeners.orientationChanged(this); |
| } |
| } |
| |
| public ListenerList<SliderListener> getSliderListeners() { |
| return sliderListeners; |
| } |
| |
| public ListenerList<SliderValueListener> getSliderValueListeners() { |
| return sliderValueListeners; |
| } |
| } |