| /* |
| * 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(); |
| } |
| |
| } |