| /* |
| * Copyright 1995-2002 Sun Microsystems, Inc. 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. Sun designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| * CA 95054 USA or visit www.sun.com if you need additional information or |
| * have any questions. |
| */ |
| package sun.awt.motif; |
| |
| import java.awt.*; |
| import java.awt.peer.*; |
| import java.awt.event.AdjustmentEvent; |
| |
| class MScrollbarPeer extends MComponentPeer implements ScrollbarPeer { |
| static { |
| initIDs(); |
| } |
| |
| private boolean inUpCall = false; |
| |
| native void create(MComponentPeer parent); |
| |
| MScrollbarPeer(Scrollbar target) { |
| super(target); |
| } |
| |
| // Initialize JNI field and method IDs |
| private static native void initIDs(); |
| |
| public native void pSetValues(int value, int visible, int minimum, int maximum); |
| public native void setLineIncrement(int l); |
| public native void setPageIncrement(int l); |
| |
| /** |
| * Returns default size of Motif scrollbar on the platform |
| * Currently uses hardcoded values |
| */ |
| int getDefaultDimension() { |
| if (System.getProperty("os.name").equals("Linux")) { |
| return 15; |
| } else { |
| return 19; |
| } |
| } |
| |
| public Dimension getMinimumSize() { |
| if (((Scrollbar)target).getOrientation() == Scrollbar.VERTICAL) { |
| return new Dimension(getDefaultDimension(), 50); |
| } else { |
| return new Dimension(50, getDefaultDimension()); |
| } |
| } |
| |
| // 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; |
| MToolkit.executeOnEventHandlerThread(sb, new Runnable() { |
| public void run() { |
| inUpCall = true; |
| sb.setValueIsAdjusting(isAdjusting); |
| sb.setValue(value); |
| postEvent(new AdjustmentEvent(sb, |
| AdjustmentEvent.ADJUSTMENT_VALUE_CHANGED, |
| type, value, isAdjusting)); |
| inUpCall = false; |
| } |
| }); |
| } |
| |
| 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; |
| MToolkit.executeOnEventHandlerThread(sb, new Runnable() { |
| public void run() { |
| // NB: notification only, no sb.setValue() |
| // last TRACK event will have done it already |
| inUpCall = true; |
| sb.setValueIsAdjusting(false); |
| postEvent(new AdjustmentEvent(sb, |
| AdjustmentEvent.ADJUSTMENT_VALUE_CHANGED, |
| AdjustmentEvent.TRACK, value, false)); |
| inUpCall = false; |
| } |
| }); |
| } |
| |
| /** |
| * Set the value of the slider in the ScrollBar. |
| */ |
| public void setValues(int value, int visible, int minimum, int maximum) { |
| // Fix for BugTraq ID 4048060. Prevent unnecessary redrawing |
| // of the slider, when the slider is already in the correct |
| // position. Since the ScrollBar widget now receives the |
| // ButtonRelease X event before the Java Adjustor event is |
| // handled, the slider is already in the correct position and |
| // does not need to be set again and redrawn, when processing |
| // the Adjustor event. |
| if (!inUpCall) { |
| pSetValues(value, visible, minimum, maximum); |
| } |
| } |
| |
| public void print(Graphics g) { |
| Scrollbar sb = (Scrollbar)target; |
| Dimension d = sb.size(); |
| Color bg = sb.getBackground(); |
| |
| boolean horiz = (sb.getOrientation() == Scrollbar.HORIZONTAL); |
| |
| drawScrollbar(g, bg, horiz? d.height : d.width, |
| horiz? d.width : d.height, |
| sb.getMinimum(), sb.getMaximum(), |
| sb.getValue(), sb.getVisible(), |
| horiz); |
| |
| target.print(g); |
| } |
| |
| |
| /** |
| * DEPRECATED |
| */ |
| public Dimension minimumSize() { |
| return getMinimumSize(); |
| } |
| |
| protected boolean shouldFocusOnClick() { |
| // Changed in 1.4 - scroll bars are made focusable by mouse clicks. |
| return true; |
| } |
| } |