1/*
2 * Copyright (c) 1996, 2009, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26#ifndef AWT_SCROLLPANE_H
27#define AWT_SCROLLPANE_H
28
29#include "awt_Canvas.h"
30
31#include "java_awt_ScrollPane.h"
32#include "java_awt_Insets.h"
33#include "sun_awt_windows_WScrollPanePeer.h"
34
35
36/************************************************************************
37 * AwtScrollPane class
38 */
39
40class AwtScrollPane : public AwtCanvas {
41public:
42
43    /* java.awt.ScrollPane fields */
44    static jfieldID scrollbarDisplayPolicyID;
45    static jfieldID hAdjustableID;
46    static jfieldID vAdjustableID;
47
48    /* java.awt.ScrollPaneAdjustable fields */
49    static jfieldID unitIncrementID;
50    static jfieldID blockIncrementID;
51
52    /* sun.awt.windows.WScrollPanePeer methods */
53    static jmethodID postScrollEventID;
54
55    AwtScrollPane();
56
57    virtual LPCTSTR GetClassName();
58
59    static AwtScrollPane* Create(jobject self, jobject hParent);
60
61    void SetInsets(JNIEnv *env);
62    void RecalcSizes(int parentWidth, int parentHeight,
63                     int childWidth, int childHeight);
64    virtual void Show(JNIEnv *env);
65    virtual void Reshape(int x, int y, int w, int h);
66    virtual void BeginValidate() {}
67    virtual void EndValidate() {}
68
69    /*
70     * Fix for bug 4046446
71     * Returns scroll position for the appropriate scrollbar.
72     */
73    int GetScrollPos(int orient);
74
75    /*
76     * Windows message handler functions
77     */
78    virtual MsgRouting WmNcHitTest(UINT x, UINT y, LRESULT& retVal);
79    virtual MsgRouting WmHScroll(UINT scrollCode, UINT pos, HWND hScrollBar);
80    virtual MsgRouting WmVScroll(UINT scrollCode, UINT pos, HWND hScrollBar);
81
82    virtual MsgRouting HandleEvent(MSG *msg, BOOL synthetic);
83
84    // some methods invoked on Toolkit thread
85    static jint _GetOffset(void *param);
86    static void _SetInsets(void *param);
87    static void _SetScrollPos(void *param);
88    static void _SetSpans(void *param);
89
90#ifdef DEBUG
91    virtual void VerifyState(); /* verify target and peer are in sync. */
92#endif
93
94private:
95    void PostScrollEvent(int orient, int scrollCode, int pos);
96    void SetScrollInfo(int orient, int max, int page, BOOL disableNoScroll);
97};
98
99#endif /* AWT_SCROLLPANE_H */
100