/*
* Copyright (c) 1996, 2002, 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 have any
* questions.
*/
package sun.awt.windows;
import java.awt.*;
import java.awt.peer.*;
import java.awt.event.AdjustmentEvent;
class WScrollbarPeer extends WComponentPeer implements ScrollbarPeer {
// Returns width for vertial scrollbar as SM_CXHSCROLL,
// height for horizontal scrollbar as SM_CYVSCROLL
static native int getScrollbarSize(int orientation);
// ComponentPeer overrides
public Dimension getMinimumSize() {
if (((Scrollbar)target).getOrientation() == Scrollbar.VERTICAL) {
return new Dimension(getScrollbarSize(Scrollbar.VERTICAL), 50);
}
else {
return new Dimension(50, getScrollbarSize(Scrollbar.HORIZONTAL));
}
}
// ScrollbarPeer implementation
public native void setValues(int value, int visible,
int minimum, int maximum);
public native void setLineIncrement(int l);
public native void setPageIncrement(int l);
// Toolkit & peer internals
WScrollbarPeer(Scrollbar target) {
super(target);
}
native void create(WComponentPeer parent);
void initialize() {
Scrollbar sb = (Scrollbar)target;
setValues(sb.getValue(), sb.getVisibleAmount(),
sb.getMinimum(), sb.getMaximum());
super.initialize();
}
// NOTE: Callback methods are called by privileged threads.
// DO NOT INVOKE CLIENT CODE ON THIS THREAD!
private void postAdjustmentEvent(final int type, final int value,
final boolean isAdjusting)
{
final Scrollbar sb = (Scrollbar)target;
WToolkit.executeOnEventHandlerThread(sb, new Runnable() {
public void run() {
sb.setValueIsAdjusting(isAdjusting);
sb.setValue(value);
postEvent(new AdjustmentEvent(sb,
AdjustmentEvent.ADJUSTMENT_VALUE_CHANGED,
type, value, isAdjusting));
}
});
}
void lineUp(int value) {
postAdjustmentEvent(AdjustmentEvent.UNIT_DECREMENT, value, false);
}
void lineDown(int value) {
postAdjustmentEvent(AdjustmentEvent.UNIT_INCREMENT, value, false);
}
void pageUp(int value) {
postAdjustmentEvent(AdjustmentEvent.BLOCK_DECREMENT, value, false);
}
void pageDown(int value) {
postAdjustmentEvent(AdjustmentEvent.BLOCK_INCREMENT, value, false);
}
// SB_TOP/BOTTOM are mapped to tracking
void warp(int value) {
postAdjustmentEvent(AdjustmentEvent.TRACK, value, false);
}
private boolean dragInProgress = false;
void drag(final int value) {
if (!dragInProgress) {
dragInProgress = true;
}
postAdjustmentEvent(AdjustmentEvent.TRACK, value, true);
}
void dragEnd(final int value) {
final Scrollbar sb = (Scrollbar)target;
if (!dragInProgress) {
return;
}
dragInProgress = false;
WToolkit.executeOnEventHandlerThread(sb, new Runnable() {
public void run() {
// NB: notification only, no sb.setValue()
// last TRACK event will have done it already
sb.setValueIsAdjusting(false);
postEvent(new AdjustmentEvent(sb,
AdjustmentEvent.ADJUSTMENT_VALUE_CHANGED,
AdjustmentEvent.TRACK, value, false));
}
});
}
public boolean shouldClearRectBeforePaint() {
return false;
}
/**
* DEPRECATED
*/
public Dimension minimumSize() {
return getMinimumSize();
}
}