com.codename1.ui.spinner.SpinnerNumberModel Maven / Gradle / Ivy
/*
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores
* CA 94065 USA or visit www.oracle.com if you need additional information or
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*/
package com.codename1.ui.spinner;
import com.codename1.ui.events.DataChangedListener;
import com.codename1.ui.events.SelectionListener;
import com.codename1.ui.list.ListModel;
import com.codename1.ui.util.EventDispatcher;
/**
* Represents a numeric model for the spinner
*
* @author Shai Almog
* @deprecated use Picker instead
*/
class SpinnerNumberModel implements ListModel {
private EventDispatcher dataListener = new EventDispatcher();
private EventDispatcher selectionListener = new EventDispatcher();
private double min;
private double max;
private double currentValue;
private double step;
boolean realValues;
/**
* The old DateSpinner relies on behavior that was broken in this commit:
* https://github.com/codenameone/CodenameOne/commit/cfac9a6a1bb15027b48a9b822e2f21eb2835d38e#diff-d12531ab4b0dd8bf1233a09f3c5e2b2b5634bff3c3cd2f357ad0a001e5f19bbf
* This is a workaround to preserve compatibility
*/
private int maxOffset = 1;
private boolean setSelectedIndexReentrantLock;
void setValue(Object value) {
int oldIndex = getSelectedIndex();
if(value instanceof Integer) {
currentValue = ((Integer)value).doubleValue();
} else {
currentValue = ((Double)value).doubleValue();
}
if (oldIndex != getSelectedIndex()) {
selectionListener.fireSelectionEvent(oldIndex, getSelectedIndex());
}
}
Object getValue() {
if(realValues) {
return new Double(currentValue);
}
return new Integer((int)currentValue);
}
/**
* Indicates the range of the spinner
*
* @param min lowest value allowed
* @param max maximum value allowed
* @param currentValue the starting value for the mode
* @param step the value by which we increment the entries in the model
*/
public SpinnerNumberModel(int min, int max, int currentValue, int step) {
this.max = max;
this.min = min;
this.currentValue = currentValue;
this.step = step;
}
SpinnerNumberModel(int min, int max, int currentValue, int step, int maxOffset) {
this.max = max;
this.min = min;
this.currentValue = currentValue;
this.step = step;
this.maxOffset = maxOffset;
}
/**
* Indicates the range of the spinner
*
* @param min lowest value allowed
* @param max maximum value allowed
* @param currentValue the starting value for the mode
* @param step the value by which we increment the entries in the model
*/
public SpinnerNumberModel(double min, double max, double currentValue, double step) {
this.max = max;
this.min = min;
this.currentValue = currentValue;
this.step = step;
realValues = true;
}
/**
* {@inheritDoc}
*/
public Object getItemAt(int index) {
if(realValues) {
return new Double(min + step * index);
}
return new Integer((int)(min + step * index));
}
/**
* {@inheritDoc}
*/
public int getSize() {
return (int)((max - min) / step) + maxOffset;
}
/**
* {@inheritDoc}
*/
public int getSelectedIndex() {
return (int)((currentValue - min) / step);
}
/**
* {@inheritDoc}
*/
public void setSelectedIndex(int index) {
if (setSelectedIndexReentrantLock) {
return;
}
setSelectedIndexReentrantLock = true;
try {
int oldIndex = getSelectedIndex();
currentValue = min + index * step;
int newIndex = getSelectedIndex();
if (oldIndex != newIndex) {
selectionListener.fireSelectionEvent(oldIndex, newIndex);
}
} finally {
setSelectedIndexReentrantLock = false;
}
}
/**
* {@inheritDoc}
*/
public void addDataChangedListener(DataChangedListener l) {
dataListener.addListener(l);
}
/**
* {@inheritDoc}
*/
public void removeDataChangedListener(DataChangedListener l) {
dataListener.removeListener(l);
}
/**
* {@inheritDoc}
*/
public void addSelectionListener(SelectionListener l) {
selectionListener.addListener(l);
}
/**
* {@inheritDoc}
*/
public void removeSelectionListener(SelectionListener l) {
selectionListener.removeListener(l);
}
/**
* {@inheritDoc}
*/
public void addItem(Object item) {
}
/**
* {@inheritDoc}
*/
public void removeItem(int index) {
}
/**
* @return the min
*/
public double getMin() {
return min;
}
/**
* @return the max
*/
public double getMax() {
return max;
}
}