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* Copyright 2002 Sun Microsystems, Inc. All rights reserved.
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package net.java.games.input;
import java.io.IOException;
/** Java wrapper for IDirectInputEffect
* @author elias
* @version 1.0
*/
final class IDirectInputEffect implements Rumbler {
private final long address;
private final DIEffectInfo info;
private boolean released;
public IDirectInputEffect(long address, DIEffectInfo info) {
this.address = address;
this.info = info;
}
public final synchronized void rumble(float intensity) {
try {
checkReleased();
if (intensity > 0) {
int int_gain = (int)Math.round(intensity*IDirectInputDevice.DI_FFNOMINALMAX);
setGain(int_gain);
start(1, 0);
} else
stop();
} catch (IOException e) {
DirectInputEnvironmentPlugin.log("Failed to set rumbler gain: " + e.getMessage());
}
}
public final Component.Identifier getAxisIdentifier() {
return null;
}
public final String getAxisName() {
return null;
}
public final synchronized void release() {
if (!released) {
released = true;
nRelease(address);
}
}
private final static native void nRelease(long address);
private final void checkReleased() throws IOException {
if (released)
throw new IOException();
}
private final void setGain(int gain) throws IOException {
int res = nSetGain(address, gain);
if (res != IDirectInputDevice.DI_DOWNLOADSKIPPED &&
res != IDirectInputDevice.DI_EFFECTRESTARTED &&
res != IDirectInputDevice.DI_OK &&
res != IDirectInputDevice.DI_TRUNCATED &&
res != IDirectInputDevice.DI_TRUNCATEDANDRESTARTED) {
throw new IOException("Failed to set effect gain (0x" + Integer.toHexString(res) + ")");
}
}
private final static native int nSetGain(long address, int gain);
private final void start(int iterations, int flags) throws IOException {
int res = nStart(address, iterations, flags);
if (res != IDirectInputDevice.DI_OK)
throw new IOException("Failed to start effect (0x" + Integer.toHexString(res) + ")");
}
private final static native int nStart(long address, int iterations, int flags);
private final void stop() throws IOException {
int res = nStop(address);
if (res != IDirectInputDevice.DI_OK)
throw new IOException("Failed to stop effect (0x" + Integer.toHexString(res) + ")");
}
private final static native int nStop(long address);
protected void finalize() {
release();
}
}
