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 #include "config.h"
27
28 #include "scrollbar_render.h"
29
30 #include <wx/defs.h>
31
32 #include <wx/dc.h>
33 #include <wx/dcgraph.h>
34 #include <wx/graphics.h>
35 #include <wx/renderer.h>
36 #include <wx/window.h>
37
38 #include <wx/msw/private.h>
39 #include <wx/msw/uxtheme.h>
40
41 // constants
42 #define SP_BUTTON 1
43 #define SP_THUMBHOR 2
44 #define SP_THUMBVERT 3
45 #define SP_TRACKENDHOR 4
46 #define SP_TRACKENDVERT 7
47 #define SP_GRIPPERHOR 8
48 #define SP_GRIPPERVERT 9
49
50 #define TS_NORMAL 1
51 #define TS_HOVER 2
52 #define TS_ACTIVE 3
53 #define TS_DISABLED 4
54
55 #define TS_UP_BUTTON 0
56 #define TS_DOWN_BUTTON 4
57 #define TS_LEFT_BUTTON 8
58 #define TS_RIGHT_BUTTON 12
59
60 #if wxUSE_GRAPHICS_CONTEXT
61 // TODO remove this dependency (gdiplus needs the macros)
62 // we need to undef because the macros are being defined in WebCorePrefix.h
63 // but GdiPlus.h is not accepting them
64 #undef max
65 #define max(a,b) (((a) > (b)) ? (a) : (b))
66
67 #undef min
68 #define min(a,b) (((a) < (b)) ? (a) : (b))
69
70 #include <wx/dcgraph.h>
71 #include "gdiplus.h"
72 using namespace Gdiplus;
73 #endif // wxUSE_GRAPHICS_CONTEXT
74
75 class GraphicsHDC
76 {
77 public:
GraphicsHDC(wxDC * dc)78 GraphicsHDC(wxDC* dc)
79 {
80 #if wxUSE_GRAPHICS_CONTEXT
81 m_graphics = NULL;
82 wxGCDC* gcdc = wxDynamicCast(dc, wxGCDC);
83 if (gcdc) {
84 m_graphics = (Graphics*)gcdc->GetGraphicsContext()->GetNativeContext();
85 m_hdc = m_graphics->GetHDC();
86 }
87 else
88 #endif
89 m_hdc = GetHdcOf(*dc);
90 }
91
~GraphicsHDC()92 ~GraphicsHDC()
93 {
94 #if wxUSE_GRAPHICS_CONTEXT
95 if (m_graphics)
96 m_graphics->ReleaseHDC(m_hdc);
97 #endif
98 }
99
operator HDC() const100 operator HDC() const { return m_hdc; }
101
102 private:
103 HDC m_hdc;
104 #if wxUSE_GRAPHICS_CONTEXT
105 Graphics* m_graphics;
106 #endif
107 };
108
getTSStateForPart(wxScrollbarPart part,wxScrollbarPart focusPart,wxScrollbarPart hoverPart,int flags=0)109 int getTSStateForPart(wxScrollbarPart part, wxScrollbarPart focusPart, wxScrollbarPart hoverPart, int flags = 0)
110 {
111 int xpState = TS_NORMAL;
112 if (flags & wxCONTROL_DISABLED)
113 xpState = TS_DISABLED;
114 else if (part == focusPart)
115 xpState = TS_ACTIVE;
116 else if (part == hoverPart)
117 xpState = TS_HOVER;
118
119 return xpState;
120 }
121
wxRenderer_DrawScrollbar(wxWindow * window,wxDC & dc,const wxRect & rect,wxOrientation orient,int current,wxScrollbarPart focusPart,wxScrollbarPart hoverPart,int max,int step,int flags)122 void wxRenderer_DrawScrollbar(wxWindow* window, wxDC& dc,
123 const wxRect& rect, wxOrientation orient, int current, wxScrollbarPart focusPart, wxScrollbarPart hoverPart, int max, int step, int flags)
124 {
125 wxUxThemeEngine *engine = wxUxThemeEngine::Get();
126 HTHEME hTheme = (HTHEME)engine->OpenThemeData(0, L"SCROLLBAR");
127
128 bool horiz = orient == wxHORIZONTAL;
129 int part = 0;
130 if (horiz)
131 part = SP_TRACKENDHOR;
132 else
133 part = SP_TRACKENDVERT;
134
135 int xpState = TS_NORMAL;
136 wxRect transRect = rect;
137
138 #if USE(WXGC)
139 // when going from GdiPlus -> Gdi, any GdiPlus transformations are lost
140 // so we need to alter the coordinates to reflect their transformed point.
141 double xtrans = 0;
142 double ytrans = 0;
143
144 wxGCDC* gcdc = wxDynamicCast(&dc, wxGCDC);
145 wxGraphicsContext* gc = gcdc->GetGraphicsContext();
146 gc->GetTransform().TransformPoint(&xtrans, &ytrans);
147
148 transRect.x += (int)xtrans;
149 transRect.y += (int)ytrans;
150 #endif
151
152 RECT r;
153 wxCopyRectToRECT(transRect, r);
154
155 // Unlike Mac, on MSW you draw the scrollbar piece by piece.
156 // so we draw the track first, then the buttons
157 if (hTheme)
158 {
159 engine->DrawThemeBackground(hTheme, GraphicsHDC(&dc), part, xpState, &r, 0);
160
161 int buttonSize = 16;
162
163 part = SP_BUTTON;
164 xpState = getTSStateForPart(wxSCROLLPART_BACKBTNSTART, focusPart, hoverPart, flags);
165 xpState += horiz ? TS_LEFT_BUTTON : TS_UP_BUTTON;
166 RECT buttonRect = r;
167 buttonRect.bottom = buttonRect.top + buttonSize;
168 buttonRect.right = buttonRect.left + buttonSize;
169 engine->DrawThemeBackground(hTheme, GraphicsHDC(&dc), part, xpState, &buttonRect, 0);
170
171 xpState = getTSStateForPart(wxSCROLLPART_FWDBTNEND, focusPart, hoverPart, flags);
172 xpState += horiz ? TS_RIGHT_BUTTON : TS_DOWN_BUTTON;
173 buttonRect = r;
174 buttonRect.top = buttonRect.bottom - buttonSize;
175 buttonRect.left = buttonRect.right - buttonSize;
176 engine->DrawThemeBackground(hTheme, GraphicsHDC(&dc), part, xpState, &buttonRect, 0);
177
178 part = horiz ? SP_THUMBHOR : SP_THUMBVERT;
179
180 int physicalLength = horiz ? rect.width : rect.height;
181 physicalLength -= buttonSize*2;
182 int thumbStart = 0;
183 int thumbLength = 0;
184 calcThumbStartAndLength(physicalLength, max,
185 current, step, &thumbStart, &thumbLength);
186 buttonRect = r;
187 if (horiz) {
188 buttonRect.left = buttonRect.left + thumbStart + buttonSize;
189 buttonRect.right = buttonRect.left + thumbLength;
190 } else {
191 buttonRect.top = buttonRect.top + thumbStart + buttonSize;
192 buttonRect.bottom = buttonRect.top + thumbLength;
193 }
194
195 xpState = getTSStateForPart(wxSCROLLPART_THUMB, focusPart, hoverPart, flags);
196 engine->DrawThemeBackground(hTheme, GraphicsHDC(&dc), part, xpState, &buttonRect, 0);
197
198 // draw the gripper
199 int thickness = ::GetSystemMetrics(SM_CXVSCROLL) / 2;
200
201 buttonRect.left += ((buttonRect.right - buttonRect.left) - thickness) / 2;
202 buttonRect.top += ((buttonRect.bottom - buttonRect.top) - thickness) / 2;
203 buttonRect.right = buttonRect.left + thickness;
204 buttonRect.bottom = buttonRect.top + thickness;
205
206 if (horiz)
207 part = SP_GRIPPERHOR;
208 else
209 part = SP_GRIPPERVERT;
210
211 engine->DrawThemeBackground(hTheme, GraphicsHDC(&dc), part, xpState, &buttonRect, 0);
212 }
213 }
214