source: trunk/src/gui/accessible/qaccessible.h@ 500

Last change on this file since 500 was 2, checked in by Dmitry A. Kuminov, 16 years ago

Initially imported qt-all-opensource-src-4.5.1 from Trolltech.
File size: 13.8 KB
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1/****************************************************************************
2**
3** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4** Contact: Qt Software Information ([email protected])
5**
6** This file is part of the QtGui module of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial Usage
10** Licensees holding valid Qt Commercial licenses may use this file in
11** accordance with the Qt Commercial License Agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and Nokia.
14**
15** GNU Lesser General Public License Usage
16** Alternatively, this file may be used under the terms of the GNU Lesser
17** General Public License version 2.1 as published by the Free Software
18** Foundation and appearing in the file LICENSE.LGPL included in the
19** packaging of this file. Please review the following information to
20** ensure the GNU Lesser General Public License version 2.1 requirements
21** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
22**
23** In addition, as a special exception, Nokia gives you certain
24** additional rights. These rights are described in the Nokia Qt LGPL
25** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
26** package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you are unsure which license is appropriate for your use, please
37** contact the sales department at [email protected].
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#ifndef QACCESSIBLE_H
43#define QACCESSIBLE_H
44
45#include <QtCore/qglobal.h>
46#include <QtCore/qobject.h>
47#include <QtCore/qrect.h>
48#include <QtCore/qset.h>
49#include <QtCore/qvector.h>
50#include <QtCore/qvariant.h>
51#include <QtGui/qcolor.h>
52#include <QtGui/qevent.h>
53
54QT_BEGIN_HEADER
55
56QT_BEGIN_NAMESPACE
57
58QT_MODULE(Gui)
59
60#ifndef QT_NO_ACCESSIBILITY
61
62class QAccessibleInterface;
63
64class Q_GUI_EXPORT QAccessible
65{
66public:
67 enum Event {
68 SoundPlayed = 0x0001,
69 Alert = 0x0002,
70 ForegroundChanged = 0x0003,
71 MenuStart = 0x0004,
72 MenuEnd = 0x0005,
73 PopupMenuStart = 0x0006,
74 PopupMenuEnd = 0x0007,
75 ContextHelpStart = 0x000C,
76 ContextHelpEnd = 0x000D,
77 DragDropStart = 0x000E,
78 DragDropEnd = 0x000F,
79 DialogStart = 0x0010,
80 DialogEnd = 0x0011,
81 ScrollingStart = 0x0012,
82 ScrollingEnd = 0x0013,
83
84 MenuCommand = 0x0018,
85
86 ObjectCreated = 0x8000,
87 ObjectDestroyed = 0x8001,
88 ObjectShow = 0x8002,
89 ObjectHide = 0x8003,
90 ObjectReorder = 0x8004,
91 Focus = 0x8005,
92 Selection = 0x8006,
93 SelectionAdd = 0x8007,
94 SelectionRemove = 0x8008,
95 SelectionWithin = 0x8009,
96 StateChanged = 0x800A,
97 LocationChanged = 0x800B,
98 NameChanged = 0x800C,
99 DescriptionChanged = 0x800D,
100 ValueChanged = 0x800E,
101 ParentChanged = 0x800F,
102 HelpChanged = 0x80A0,
103 DefaultActionChanged = 0x80B0,
104 AcceleratorChanged = 0x80C0
105 };
106
107 enum StateFlag {
108 Normal = 0x00000000,
109 Unavailable = 0x00000001,
110 Selected = 0x00000002,
111 Focused = 0x00000004,
112 Pressed = 0x00000008,
113 Checked = 0x00000010,
114 Mixed = 0x00000020,
115 ReadOnly = 0x00000040,
116 HotTracked = 0x00000080,
117 DefaultButton = 0x00000100,
118 Expanded = 0x00000200,
119 Collapsed = 0x00000400,
120 Busy = 0x00000800,
121 // Floating = 0x00001000,
122 Marqueed = 0x00002000,
123 Animated = 0x00004000,
124 Invisible = 0x00008000,
125 Offscreen = 0x00010000,
126 Sizeable = 0x00020000,
127 Movable = 0x00040000,
128#ifdef QT3_SUPPORT
129 Moveable = Movable,
130#endif
131 SelfVoicing = 0x00080000,
132 Focusable = 0x00100000,
133 Selectable = 0x00200000,
134 Linked = 0x00400000,
135 Traversed = 0x00800000,
136 MultiSelectable = 0x01000000,
137 ExtSelectable = 0x02000000,
138 //AlertLow = 0x04000000,
139 //AlertMedium = 0x08000000,
140 //AlertHigh = 0x10000000, /* reused for HasInvokeExtension */
141 Protected = 0x20000000,
142 HasPopup = 0x40000000,
143 Modal = 0x80000000,
144
145 HasInvokeExtension = 0x10000000 // internal
146 };
147 Q_DECLARE_FLAGS(State, StateFlag)
148
149 enum Role {
150 NoRole = 0x00000000,
151 TitleBar = 0x00000001,
152 MenuBar = 0x00000002,
153 ScrollBar = 0x00000003,
154 Grip = 0x00000004,
155 Sound = 0x00000005,
156 Cursor = 0x00000006,
157 Caret = 0x00000007,
158 AlertMessage = 0x00000008,
159 Window = 0x00000009,
160 Client = 0x0000000A,
161 PopupMenu = 0x0000000B,
162 MenuItem = 0x0000000C,
163 ToolTip = 0x0000000D,
164 Application = 0x0000000E,
165 Document = 0x0000000F,
166 Pane = 0x00000010,
167 Chart = 0x00000011,
168 Dialog = 0x00000012,
169 Border = 0x00000013,
170 Grouping = 0x00000014,
171 Separator = 0x00000015,
172 ToolBar = 0x00000016,
173 StatusBar = 0x00000017,
174 Table = 0x00000018,
175 ColumnHeader = 0x00000019,
176 RowHeader = 0x0000001A,
177 Column = 0x0000001B,
178 Row = 0x0000001C,
179 Cell = 0x0000001D,
180 Link = 0x0000001E,
181 HelpBalloon = 0x0000001F,
182 Assistant = 0x00000020,
183 List = 0x00000021,
184 ListItem = 0x00000022,
185 Tree = 0x00000023,
186 TreeItem = 0x00000024,
187 PageTab = 0x00000025,
188 PropertyPage = 0x00000026,
189 Indicator = 0x00000027,
190 Graphic = 0x00000028,
191 StaticText = 0x00000029,
192 EditableText = 0x0000002A, // Editable, selectable, etc.
193 PushButton = 0x0000002B,
194 CheckBox = 0x0000002C,
195 RadioButton = 0x0000002D,
196 ComboBox = 0x0000002E,
197 // DropList = 0x0000002F,
198 ProgressBar = 0x00000030,
199 Dial = 0x00000031,
200 HotkeyField = 0x00000032,
201 Slider = 0x00000033,
202 SpinBox = 0x00000034,
203 Canvas = 0x00000035,
204 Animation = 0x00000036,
205 Equation = 0x00000037,
206 ButtonDropDown = 0x00000038,
207 ButtonMenu = 0x00000039,
208 ButtonDropGrid = 0x0000003A,
209 Whitespace = 0x0000003B,
210 PageTabList = 0x0000003C,
211 Clock = 0x0000003D,
212 Splitter = 0x0000003E,
213 LayeredPane = 0x0000003F,
214 UserRole = 0x0000ffff
215 };
216
217 enum Text {
218 Name = 0,
219 Description,
220 Value,
221 Help,
222 Accelerator,
223 UserText = 0x0000ffff
224 };
225
226 enum RelationFlag {
227 Unrelated = 0x00000000,
228 Self = 0x00000001,
229 Ancestor = 0x00000002,
230 Child = 0x00000004,
231 Descendent = 0x00000008,
232 Sibling = 0x00000010,
233 HierarchyMask = 0x000000ff,
234
235 Up = 0x00000100,
236 Down = 0x00000200,
237 Left = 0x00000400,
238 Right = 0x00000800,
239 Covers = 0x00001000,
240 Covered = 0x00002000,
241 GeometryMask = 0x0000ff00,
242
243 FocusChild = 0x00010000,
244 Label = 0x00020000,
245 Labelled = 0x00040000,
246 Controller = 0x00080000,
247 Controlled = 0x00100000,
248 LogicalMask = 0x00ff0000
249 };
250 Q_DECLARE_FLAGS(Relation, RelationFlag)
251
252 enum Action {
253 DefaultAction = 0,
254 Press = -1,
255 FirstStandardAction = Press,
256 SetFocus = -2,
257 Increase = -3,
258 Decrease = -4,
259 Accept = -5,
260 Cancel = -6,
261 Select = -7,
262 ClearSelection = -8,
263 RemoveSelection = -9,
264 ExtendSelection = -10,
265 AddToSelection = -11,
266 LastStandardAction = AddToSelection
267 };
268
269 enum Method {
270 ListSupportedMethods = 0,
271 SetCursorPosition = 1,
272 GetCursorPosition = 2,
273 ForegroundColor = 3,
274 BackgroundColor = 4
275 };
276
277 typedef QAccessibleInterface*(*InterfaceFactory)(const QString &key, QObject*);
278 typedef void(*UpdateHandler)(QObject*, int who, Event reason);
279 typedef void(*RootObjectHandler)(QObject*);
280
281 static void installFactory(InterfaceFactory);
282 static void removeFactory(InterfaceFactory);
283 static UpdateHandler installUpdateHandler(UpdateHandler);
284 static RootObjectHandler installRootObjectHandler(RootObjectHandler);
285
286 static QAccessibleInterface *queryAccessibleInterface(QObject *);
287 static void updateAccessibility(QObject *, int who, Event reason);
288 static bool isActive();
289 static void setRootObject(QObject*);
290
291 static void initialize();
292 static void cleanup();
293
294private:
295 static UpdateHandler updateHandler;
296 static RootObjectHandler rootObjectHandler;
297};
298
299Q_DECLARE_OPERATORS_FOR_FLAGS(QAccessible::State)
300Q_DECLARE_OPERATORS_FOR_FLAGS(QAccessible::Relation)
301QT_END_NAMESPACE
302Q_DECLARE_METATYPE(QSet<QAccessible::Method>)
303QT_BEGIN_NAMESPACE
304
305namespace QAccessible2
306{
307 enum InterfaceType
308 {
309 TextInterface,
310 EditableTextInterface,
311 ValueInterface,
312 TableInterface
313 };
314}
315
316class QAccessible2Interface;
317class QAccessibleTextInterface;
318class QAccessibleEditableTextInterface;
319class QAccessibleValueInterface;
320class QAccessibleTableInterface;
321
322class Q_GUI_EXPORT QAccessibleInterface : public QAccessible
323{
324public:
325 virtual ~QAccessibleInterface() {}
326 // check for valid pointers
327 virtual bool isValid() const = 0;
328 virtual QObject *object() const = 0;
329
330 // hierarchy
331 virtual int childCount() const = 0;
332 virtual int indexOfChild(const QAccessibleInterface *) const = 0;
333
334 // relations
335 virtual Relation relationTo(int child, const QAccessibleInterface *other,
336 int otherChild) const = 0;
337 virtual int childAt(int x, int y) const = 0;
338
339 // navigation
340 virtual int navigate(RelationFlag relation, int index, QAccessibleInterface **iface) const = 0;
341
342 // properties and state
343 virtual QString text(Text t, int child) const = 0;
344 virtual void setText(Text t, int child, const QString &text) = 0;
345 virtual QRect rect(int child) const = 0;
346 virtual Role role(int child) const = 0;
347 virtual State state(int child) const = 0;
348
349 // action
350 virtual int userActionCount(int child) const = 0;
351 virtual QString actionText(int action, Text t, int child) const = 0;
352 virtual bool doAction(int action, int child, const QVariantList &params = QVariantList()) = 0;
353
354 QVariant invokeMethod(Method method, int child = 0,
355 const QVariantList &params = QVariantList());
356
357 inline QSet<Method> supportedMethods()
358 { return qvariant_cast<QSet<Method> >(invokeMethod(ListSupportedMethods)); }
359
360 inline QColor foregroundColor()
361 { return qvariant_cast<QColor>(invokeMethod(ForegroundColor)); }
362
363 inline QColor backgroundColor()
364 { return qvariant_cast<QColor>(invokeMethod(BackgroundColor)); }
365
366 inline QAccessibleTextInterface *textInterface()
367 { return reinterpret_cast<QAccessibleTextInterface *>(cast_helper(QAccessible2::TextInterface)); }
368
369 inline QAccessibleEditableTextInterface *editableTextInterface()
370 { return reinterpret_cast<QAccessibleEditableTextInterface *>(cast_helper(QAccessible2::EditableTextInterface)); }
371
372 inline QAccessibleValueInterface *valueInterface()
373 { return reinterpret_cast<QAccessibleValueInterface *>(cast_helper(QAccessible2::ValueInterface)); }
374
375 inline QAccessibleTableInterface *tableInterface()
376 { return reinterpret_cast<QAccessibleTableInterface *>(cast_helper(QAccessible2::TableInterface)); }
377
378private:
379 QAccessible2Interface *cast_helper(QAccessible2::InterfaceType);
380};
381
382class Q_GUI_EXPORT QAccessibleInterfaceEx: public QAccessibleInterface
383{
384public:
385 virtual QVariant invokeMethodEx(Method method, int child, const QVariantList &params) = 0;
386 virtual QVariant virtual_hook(const QVariant &data);
387 virtual QAccessible2Interface *interface_cast(QAccessible2::InterfaceType)
388 { return 0; }
389};
390
391
392class Q_GUI_EXPORT QAccessibleEvent : public QEvent
393{
394public:
395 inline QAccessibleEvent(Type type, int child);
396 inline int child() const { return c; }
397 inline QString value() const { return val; }
398 inline void setValue(const QString &aText) { val = aText; }
399
400private:
401 int c;
402 QString val;
403};
404
405inline QAccessibleEvent::QAccessibleEvent(Type atype, int achild)
406 : QEvent(atype), c(achild) {}
407
408#define QAccessibleInterface_iid "com.trolltech.Qt.QAccessibleInterface"
409Q_DECLARE_INTERFACE(QAccessibleInterface, QAccessibleInterface_iid)
410
411#endif // QT_NO_ACCESSIBILITY
412
413QT_END_NAMESPACE
414
415QT_END_HEADER
416
417#endif // QACCESSIBLE_H
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