summaryrefslogtreecommitdiff
path: root/tools/designer/src/lib/sdk/propertysheet.qdoc
blob: becc74b0ed45ce13b044b04d02cb3494f28928ee (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:FDL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Free Documentation License
** Alternatively, this file may be used under the terms of the GNU Free
** Documentation License version 1.3 as published by the Free Software
** Foundation and appearing in the file included in the packaging of this
** file.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/

/*!
    \class QDesignerPropertySheetExtension

    \brief The QDesignerPropertySheetExtension class allows you to
    manipulate a widget's properties which is displayed in Qt
    Designer's property editor.

    \sa QDesignerDynamicPropertySheetExtension

    \inmodule QtDesigner

    QDesignerPropertySheetExtension provides a collection of functions that
    are typically used to query a widget's properties, and to
    manipulate the properties' appearance in the property editor. For
    example:

    \snippet doc/src/snippets/code/doc_src_qtdesigner.cpp 15

    Note that if you change the value of a property using the
    QDesignerPropertySheetExtension::setProperty() function, the undo
    stack is not updated. To ensure that a property's value can be
    reverted using the undo stack, you must use the
    QDesignerFormWindowCursorInterface::setProperty() function, or its
    buddy \l
    {QDesignerFormWindowCursorInterface::setWidgetProperty()}{setWidgetProperty()},
    instead.

    When implementing a custom widget plugin, a pointer to \QD's
    current QDesignerFormEditorInterface object (\c formEditor in the
    example above) is provided by the
    QDesignerCustomWidgetInterface::initialize() function's parameter.

    The property sheet, or any other extension, can be retrieved by
    querying \QD's extension manager using the qt_extension()
    function. When you want to release the extension, you only need to
    delete the pointer.

    All widgets have a default property sheet which populates \QD's
    property editor with the widget's properties (i.e the ones defined
    with the Q_PROPERTY() macro). But QDesignerPropertySheetExtension
    also provides an interface for creating custom property sheet
    extensions.

    \warning \QD uses the QDesignerPropertySheetExtension to feed its
    property editor. Whenever a widget is selected in its workspace,
    \QD will query for the widget's property sheet extension. If the
    selected widget has an implemented property sheet extension, this
    extension will override the default property sheet.

    To create a property sheet extension, your extension class must
    inherit from both QObject and
    QDesignerPropertySheetExtension. Then, since we are implementing
    an interface, we must ensure that it's made known to the meta
    object system using the Q_INTERFACES() macro:

    \snippet doc/src/snippets/code/doc_src_qtdesigner.cpp 16

    This enables \QD to use qobject_cast() to query for supported
    interfaces using nothing but a QObject pointer.

    In \QD the extensions are not created until they are
    required. For that reason, when implementing a property sheet
    extension, you must also create a QExtensionFactory, i.e a class
    that is able to make an instance of your extension, and register
    it using \QD's \l {QExtensionManager}{extension manager}.

    When a property sheet extension is required, \QD's \l
    {QExtensionManager}{extension manager} will run through all its
    registered factories calling QExtensionFactory::createExtension()
    for each until the first one that is able to create a property
    sheet extension for the selected widget, is found. This factory
    will then make an instance of the extension. If no such factory
    can be found, \QD will use the default property sheet.

    There are four available types of extensions in \QD:
    QDesignerContainerExtension, QDesignerMemberSheetExtension,
    QDesignerPropertySheetExtension and QDesignerTaskMenuExtension. Qt
    Designer's behavior is the same whether the requested extension is
    associated with a multi page container, a member sheet, a property
    sheet or a task menu.

    The QExtensionFactory class provides a standard extension factory,
    and can also be used as an interface for custom extension
    factories. You can either create a new QExtensionFactory and
    reimplement the QExtensionFactory::createExtension() function. For
    example:

    \snippet doc/src/snippets/code/doc_src_qtdesigner.cpp 17

    Or you can use an existing factory, expanding the
    QExtensionFactory::createExtension() function to make the factory
    able to create a property sheet extension extension as well. For
    example:

    \snippet doc/src/snippets/code/doc_src_qtdesigner.cpp 18

    For a complete example using an extension class, see the \l
    {designer/taskmenuextension}{Task Menu Extension example}. The
    example shows how to create a custom widget plugin for Qt
    Designer, and how to to use the QDesignerTaskMenuExtension class
    to add custom items to \QD's task menu.

    \sa QExtensionFactory, QExtensionManager, {Creating Custom Widget
    Extensions}
*/

/*!
    \fn QDesignerPropertySheetExtension::~QDesignerPropertySheetExtension()

    Destroys the property sheet extension.
*/

/*!
    \fn int QDesignerPropertySheetExtension::count() const

    Returns the selected widget's number of properties.
*/

/*!
    \fn int QDesignerPropertySheetExtension::indexOf(const QString &name) const

    Returns the index for a given property \a name.

    \sa propertyName()
*/

/*!
    \fn QString QDesignerPropertySheetExtension::propertyName(int index) const

    Returns the name of the property at the given \a index.

    \sa indexOf()
*/

/*!
    \fn QString QDesignerPropertySheetExtension::propertyGroup(int index) const

    Returns the property group for the property at the given \a index.

    \QD's property editor supports property groups, i.e. sections of
    related properties. A property can be related to a group using the
    setPropertyGroup() function. The default group of any property is
    the name of the class that defines it. For example, the
    QObject::objectName property appears within the QObject property
    group.

    \sa indexOf(), setPropertyGroup()
*/

/*!
    \fn void QDesignerPropertySheetExtension::setPropertyGroup(int index, const QString &group)

    Sets the property group for the property at the given \a index to
    \a group.

    Relating a property to a group makes it appear within that group's
    section in the property editor. The default property group of any
    property is the name of the class that defines it. For example,
    the QObject::objectName property appears within the QObject
    property group.

    \sa indexOf(), property(), propertyGroup()
*/

/*!
    \fn bool QDesignerPropertySheetExtension::hasReset(int index) const

    Returns true if the property at the given \a index has a reset
    button in \QD's property editor, otherwise false.

    \sa indexOf(), reset()
*/

/*!
    \fn bool QDesignerPropertySheetExtension::reset(int index)

    Resets the value of the property at the given \a index, to the
    default value. Returns true if a default value could be found, otherwise false.

    \sa indexOf(), hasReset(), isChanged()
*/

/*!
    \fn bool QDesignerPropertySheetExtension::isVisible(int index) const

    Returns true if the property at the given \a index is visible in
    \QD's property editor, otherwise false.

    \sa indexOf(), setVisible()
*/

/*!
    \fn void QDesignerPropertySheetExtension::setVisible(int index, bool visible)

    If \a visible is true, the property at the given \a index is
    visible in \QD's property editor; otherwise the property is
    hidden.

    \sa indexOf(), isVisible()
*/

/*!
    \fn bool QDesignerPropertySheetExtension::isAttribute(int index) const

    Returns true if the property at the given \a index is an attribute,
    which will be \e excluded from the UI file, otherwise false.

    \sa indexOf(), setAttribute()
*/

/*!
    \fn void QDesignerPropertySheetExtension::setAttribute(int index, bool attribute)

    If \a attribute is true, the property at the given \a index is
    made an attribute which will be \e excluded from the UI file;
    otherwise it will be included.

    \sa indexOf(), isAttribute()
*/

/*!
    \fn QVariant QDesignerPropertySheetExtension::property(int index) const

    Returns the value of the property at the given \a index.

    \sa indexOf(), setProperty(), propertyGroup()
*/

/*!
    \fn void QDesignerPropertySheetExtension::setProperty(int index, const QVariant &value)

    Sets the \a value of the property at the given \a index.

    \warning If you change the value of a property using this
    function, the undo stack is not updated. To ensure that a
    property's value can be reverted using the undo stack, you must
    use the QDesignerFormWindowCursorInterface::setProperty()
    function, or its buddy \l
    {QDesignerFormWindowCursorInterface::setWidgetProperty()}{setWidgetProperty()},
    instead.

    \sa indexOf(), property(), propertyGroup()
*/

/*!
    \fn bool QDesignerPropertySheetExtension::isChanged(int index) const

    Returns true if the value of the property at the given \a index
    differs from the property's default value, otherwise false.

    \sa indexOf(), setChanged(), reset()
*/

/*!
    \fn void QDesignerPropertySheetExtension::setChanged(int index, bool changed)

    Sets whether the property at the given \a index is different from
    its default value, or not, depending on the \a changed parameter.

    \sa indexOf(), isChanged()
*/