1 /*
2 * Copyright (C) 2009 Kevin Ollivier All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #ifndef scrollbar_render_h
27 #define scrollbar_render_h
28
29 #include <wx/defs.h>
30 #include <wx/dc.h>
31 #include <wx/renderer.h>
32
33 enum wxScrollbarPart {
34 wxSCROLLPART_NONE = 0,
35 wxSCROLLPART_BACKBTNSTART = 1,
36 wxSCROLLPART_FWDBTNSTART = 1 << 1,
37 wxSCROLLPART_BACKTRACK = 1 << 2,
38 wxSCROLLPART_THUMB = 1 << 3,
39 wxSCROLLPART_FWDTRACK = 1 << 4,
40 wxSCROLLPART_BACKBTNEND = 1 << 5,
41 wxSCROLLPART_FWDBTNEND = 1 << 6,
42 wxSCROLLPART_SCROLLBARBG = 1 << 7,
43 wxSCROLLPART_TRACKBG = 1 << 8,
44 wxSCROLLPART_ALL = 0xffffffff,
45 };
46
47 void wxRenderer_DrawScrollbar(wxWindow* window, wxDC& dc,
48 const wxRect& rect,
49 wxOrientation orientation,
50 int current, wxScrollbarPart focusPart, wxScrollbarPart hoverPart,
51 int max, int step, int flags=0);
52
calcThumbStartAndLength(int physicalLength,int max,int current,int step,int * thumbStart,int * thumbLength)53 inline void calcThumbStartAndLength(int physicalLength, int max, int current,
54 int step, int *thumbStart, int *thumbLength)
55 {
56 float proportion = ((float)physicalLength - 8)/ (max + step);
57 float thumbSize = proportion * (float)physicalLength;
58 if (thumbSize < 20)
59 thumbSize = 20;
60
61 float thumbPos = ((float)current / (float)max) * ((float)physicalLength - thumbSize);
62 if (thumbStart)
63 *thumbStart = thumbPos;
64
65 if (thumbLength)
66 *thumbLength = thumbSize;
67 }
68 #endif
69