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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 DIDEVICEOBJECTINSTANCE
* @author elias
* @version 1.0
*/
final class DIDeviceObject {
//DirectInput scales wheel deltas by 120
private final static int WHEEL_SCALE = 120;
private final IDirectInputDevice device;
private final byte[] guid;
private final int identifier;
private final int type;
private final int instance;
private final int guid_type;
private final int flags;
private final String name;
private final Component.Identifier id;
private final int format_offset;
private final long min;
private final long max;
private final int deadzone;
/* These are used for emulating relative axes */
private int last_poll_value;
private int last_event_value;
public DIDeviceObject(IDirectInputDevice device, Component.Identifier id, byte[] guid, int guid_type, int identifier, int type, int instance, int flags, String name, int format_offset) throws IOException {
this.device = device;
this.id = id;
this.guid = guid;
this.identifier = identifier;
this.type = type;
this.instance = instance;
this.guid_type = guid_type;
this.flags = flags;
this.name = name;
this.format_offset = format_offset;
if (isAxis() && !isRelative()) {
long[] range = device.getRangeProperty(identifier);
this.min = range[0];
this.max = range[1];
this.deadzone = device.getDeadzoneProperty(identifier);
} else {
this.min = IDirectInputDevice.DIPROPRANGE_NOMIN;
this.max = IDirectInputDevice.DIPROPRANGE_NOMAX;
this.deadzone = 0;
}
}
public final synchronized int getRelativePollValue(int current_abs_value) {
if (device.areAxesRelative())
return current_abs_value;
int rel_value = current_abs_value - last_poll_value;
last_poll_value = current_abs_value;
return rel_value;
}
public final synchronized int getRelativeEventValue(int current_abs_value) {
if (device.areAxesRelative())
return current_abs_value;
int rel_value = current_abs_value - last_event_value;
last_event_value = current_abs_value;
return rel_value;
}
public final int getGUIDType() {
return guid_type;
}
public final int getFormatOffset() {
return format_offset;
}
public final IDirectInputDevice getDevice() {
return device;
}
public final int getDIIdentifier() {
return identifier;
}
public final Component.Identifier getIdentifier() {
return id;
}
public final String getName() {
return name;
}
public final int getInstance() {
return instance;
}
public final int getType() {
return type;
}
public final byte[] getGUID() {
return guid;
}
public final int getFlags() {
return flags;
}
public final long getMin() {
return min;
}
public final long getMax() {
return max;
}
public final float getDeadzone() {
return deadzone;
}
public final boolean isButton() {
return (type & IDirectInputDevice.DIDFT_BUTTON) != 0;
}
public final boolean isAxis() {
return (type & IDirectInputDevice.DIDFT_AXIS) != 0;
}
public final boolean isRelative() {
return isAxis() && (type & IDirectInputDevice.DIDFT_RELAXIS) != 0;
}
public final boolean isAnalog() {
return isAxis() && id != Component.Identifier.Axis.POV;
}
public final float convertValue(float value) {
if (getDevice().getType() == IDirectInputDevice.DI8DEVTYPE_MOUSE && id == Component.Identifier.Axis.Z) {
return value/WHEEL_SCALE;
} else if (isButton()) {
return (((int)value) & 0x80) != 0 ? 1 : 0;
} else if (id == Component.Identifier.Axis.POV) {
int int_value = (int)value;
if ((int_value & 0xFFFF) == 0xFFFF)
return Component.POV.OFF;
// DirectInput returns POV directions in hundredths of degree clockwise from north
int slice = 360*100/16;
if (int_value >= 0 && int_value < slice)
return Component.POV.UP;
else if (int_value < 3*slice)
return Component.POV.UP_RIGHT;
else if (int_value < 5*slice)
return Component.POV.RIGHT;
else if (int_value < 7*slice)
return Component.POV.DOWN_RIGHT;
else if (int_value < 9*slice)
return Component.POV.DOWN;
else if (int_value < 11*slice)
return Component.POV.DOWN_LEFT;
else if (int_value < 13*slice)
return Component.POV.LEFT;
else if (int_value < 15*slice)
return Component.POV.UP_LEFT;
else
return Component.POV.UP;
} else if (isAxis() && !isRelative()) {
return 2*(value - min)/(float)(max - min) - 1;
} else
return value;
}
}