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
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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
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24  */
25 
26 #ifndef AWT_SCROLLBAR_H
27 #define AWT_SCROLLBAR_H
28 
29 #include "awt_Component.h"
30 
31 #include "java_awt_Scrollbar.h"
32 #include "sun_awt_windows_WScrollbarPeer.h"
33 
34 
35 #define Java_java_awt_Scrollbar_HORIZONTAL    0
36 #define Java_java_awt_Scrollbar_VERTICAL      1
37 
38 
39 /************************************************************************
40  * AwtScrollbar class
41  */
42 
43 class AwtScrollbar : public AwtComponent {
44 public:
45 
46     /* java.awt.Scrollbar fields */
47     static jfieldID lineIncrementID;
48     static jfieldID pageIncrementID;
49     static jfieldID orientationID;
50 
51     AwtScrollbar();
52     virtual ~AwtScrollbar();
53 
54     virtual void Dispose();
55 
56     virtual LPCTSTR GetClassName();
57 
58     static AwtScrollbar* Create(jobject self, jobject parent);
59 
60     void SetValue(int value);
SetLineIncrement(int value)61     void SetLineIncrement(int value) { m_lineIncr = value; }
SetPageIncrement(int value)62     void SetPageIncrement(int value) { m_pageIncr = value; }
63 
64     virtual LRESULT WindowProc(UINT message, WPARAM wParam, LPARAM lParam);
65 
66     /*
67      * Windows message handler functions
68      */
69     virtual MsgRouting WmHScroll(UINT scrollCode, UINT pos, HWND hScrollBar);
70     virtual MsgRouting WmVScroll(UINT scrollCode, UINT pos, HWND hScrollBar);
71 
72     // Prevent KB Q102552 race.
73     virtual MsgRouting WmMouseDown(UINT flags, int x, int y, int button);
74     virtual MsgRouting WmNcHitTest(UINT x, UINT y, LRESULT& retVal);
75 
76     virtual MsgRouting HandleEvent(MSG *msg, BOOL synthetic);
77 
IsScrollbar()78     INLINE virtual BOOL IsScrollbar() { return TRUE; }
79 
80     static void _SetLineIncrement(void *param);
81     static void _SetPageIncrement(void *param);
82     // invoked on Toolkit thread
83     static void _SetValues(void *param);
84 
85 private:
86     UINT          m_orientation; /* SB_HORZ or SB_VERT */
87 
88     int           m_lineIncr;
89     int           m_pageIncr;
90 
91     // Work around KB Q73839 bug.
92     void UpdateFocusIndicator();
93 
94     // Don't do redundant callbacks.
95     const char *m_prevCallback;
96     int m_prevCallbackPos;
97 
98     static const char * const SbNlineDown;
99     static const char * const SbNlineUp;
100     static const char * const SbNpageDown;
101     static const char * const SbNpageUp;
102     static const char * const SbNdrag;
103     static const char * const SbNdragEnd;
104     static const char * const SbNwarp;
105 
106     static int ms_instanceCounter;
107     static HHOOK ms_hMouseFilter;
108     static BOOL ms_isInsideMouseFilter;
109     static LRESULT CALLBACK MouseFilter(int nCode, WPARAM wParam,
110                                         LPARAM lParam);
111 
112     void DoScrollCallbackCoalesce(const char* methodName, int newPos);
113 };
114 
115 #endif /* AWT_SCROLLBAR_H */
116