plugins.linux.src.java.net.java.games.input.LinuxEventComponent Maven / Gradle / Ivy
/**
* Copyright (C) 2003 Jeremy Booth ([email protected])
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer. Redistributions in binary
* form must reproduce the above copyright notice, this list of conditions and
* the following disclaimer in the documentation and/or other materials provided
* with the distribution.
* The name of the author may not be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
*/
package net.java.games.input;
import java.io.IOException;
/**
* @author elias
* @author Jeremy Booth ([email protected])
*/
final class LinuxEventComponent {
private final LinuxEventDevice device;
private final Component.Identifier identifier;
private final Controller.Type button_trait;
private final boolean is_relative;
private final LinuxAxisDescriptor descriptor;
private final int min;
private final int max;
private final int flat;
public LinuxEventComponent(LinuxEventDevice device, Component.Identifier identifier, boolean is_relative, int native_type, int native_code) throws IOException {
this.device = device;
this.identifier = identifier;
if (native_type == NativeDefinitions.EV_KEY)
this.button_trait = LinuxNativeTypesMap.guessButtonTrait(native_code);
else
this.button_trait = Controller.Type.UNKNOWN;
this.is_relative = is_relative;
this.descriptor = new LinuxAxisDescriptor();
descriptor.set(native_type, native_code);
if (native_type == NativeDefinitions.EV_ABS) {
LinuxAbsInfo abs_info = new LinuxAbsInfo();
getAbsInfo(abs_info);
this.min = abs_info.getMin();
this.max = abs_info.getMax();
this.flat = abs_info.getFlat();
} else {
this.min = Integer.MIN_VALUE;
this.max = Integer.MAX_VALUE;
this.flat = 0;
}
}
public final LinuxEventDevice getDevice() {
return device;
}
public final void getAbsInfo(LinuxAbsInfo abs_info) throws IOException {
assert descriptor.getType() == NativeDefinitions.EV_ABS;
device.getAbsInfo(descriptor.getCode(), abs_info);
}
public final Controller.Type getButtonTrait() {
return button_trait;
}
public final Component.Identifier getIdentifier() {
return identifier;
}
public final LinuxAxisDescriptor getDescriptor() {
return descriptor;
}
public final boolean isRelative() {
return is_relative;
}
public final boolean isAnalog() {
return identifier instanceof Component.Identifier.Axis && identifier != Component.Identifier.Axis.POV;
}
final float convertValue(float value) {
if (identifier instanceof Component.Identifier.Axis && !is_relative) {
// Some axes have min = max = 0
if (min == max)
return 0;
if (value > max)
value = max;
else if (value < min)
value = min;
return 2*(value - min)/(max - min) - 1;
} else {
return value;
}
}
final float getDeadZone() {
return flat/(2f*(max - min));
}
}