1 | // Copyright (C) 2017 The Qt Company Ltd. |
---|---|
2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
3 | |
4 | #include "qquickgroupbox_p.h" |
5 | #include "qquickframe_p_p.h" |
6 | #include "qquickdeferredexecute_p_p.h" |
7 | |
8 | #include <QtGui/qpa/qplatformtheme.h> |
9 | |
10 | QT_BEGIN_NAMESPACE |
11 | |
12 | /*! |
13 | \qmltype GroupBox |
14 | \inherits Frame |
15 | //! \nativetype QQuickGroupBox |
16 | \inqmlmodule QtQuick.Controls |
17 | \since 5.7 |
18 | \ingroup qtquickcontrols-containers |
19 | \brief Visual frame and title for a logical group of controls. |
20 | |
21 | GroupBox is used to layout a logical group of controls together, within |
22 | a \l {title}{titled} visual frame. GroupBox does not provide a layout of its own, but |
23 | requires you to position its contents, for instance by creating a \l RowLayout |
24 | or a \l ColumnLayout. |
25 | |
26 | Items declared as children of a GroupBox are automatically parented to the |
27 | GroupBox's \l {Control::}{contentItem}. Items created dynamically need to be |
28 | explicitly parented to the contentItem. |
29 | |
30 | If only a single item is used within a GroupBox, it will resize to fit the |
31 | implicit size of its contained item. This makes it particularly suitable |
32 | for use together with layouts. |
33 | |
34 | \image qtquickcontrols-groupbox.png |
35 | |
36 | \snippet qtquickcontrols-groupbox.qml 1 |
37 | |
38 | \section2 Checkable GroupBox |
39 | |
40 | Even though GroupBox has no built-in check box, it is straightforward |
41 | to create a checkable GroupBox by pairing it with a CheckBox. |
42 | |
43 | \image qtquickcontrols-groupbox-checkable.png |
44 | |
45 | It is a common pattern to enable or disable the groupbox's children when |
46 | its checkbox is toggled on or off, but it is up to the application to decide |
47 | on the behavior of the checkbox. |
48 | |
49 | \snippet qtquickcontrols-groupbox-checkable.qml 1 |
50 | |
51 | \sa CheckBox, {Customizing GroupBox}, {Container Controls} |
52 | */ |
53 | |
54 | class QQuickGroupBoxPrivate : public QQuickFramePrivate |
55 | { |
56 | Q_DECLARE_PUBLIC(QQuickGroupBox) |
57 | |
58 | public: |
59 | void cancelLabel(); |
60 | void executeLabel(bool complete = false); |
61 | |
62 | void itemImplicitWidthChanged(QQuickItem *item) override; |
63 | void itemImplicitHeightChanged(QQuickItem *item) override; |
64 | void itemDestroyed(QQuickItem *item) override; |
65 | |
66 | QPalette defaultPalette() const override { return QQuickTheme::palette(scope: QQuickTheme::GroupBox); } |
67 | |
68 | QString title; |
69 | QQuickDeferredPointer<QQuickItem> label; |
70 | }; |
71 | |
72 | static inline QString labelName() { return QStringLiteral("label"); } |
73 | |
74 | void QQuickGroupBoxPrivate::cancelLabel() |
75 | { |
76 | Q_Q(QQuickGroupBox); |
77 | quickCancelDeferred(object: q, property: labelName()); |
78 | } |
79 | |
80 | void QQuickGroupBoxPrivate::executeLabel(bool complete) |
81 | { |
82 | Q_Q(QQuickGroupBox); |
83 | if (label.wasExecuted()) |
84 | return; |
85 | |
86 | if (!label || complete) |
87 | quickBeginDeferred(object: q, property: labelName(), delegate&: label); |
88 | if (complete) |
89 | quickCompleteDeferred(object: q, property: labelName(), delegate&: label); |
90 | } |
91 | |
92 | void QQuickGroupBoxPrivate::itemImplicitWidthChanged(QQuickItem *item) |
93 | { |
94 | Q_Q(QQuickGroupBox); |
95 | QQuickFramePrivate::itemImplicitWidthChanged(item); |
96 | if (item == label) |
97 | emit q->implicitLabelWidthChanged(); |
98 | } |
99 | |
100 | void QQuickGroupBoxPrivate::itemImplicitHeightChanged(QQuickItem *item) |
101 | { |
102 | Q_Q(QQuickGroupBox); |
103 | QQuickFramePrivate::itemImplicitHeightChanged(item); |
104 | if (item == label) |
105 | emit q->implicitLabelHeightChanged(); |
106 | } |
107 | |
108 | void QQuickGroupBoxPrivate::itemDestroyed(QQuickItem *item) |
109 | { |
110 | Q_Q(QQuickGroupBox); |
111 | QQuickFramePrivate::itemDestroyed(item); |
112 | if (item == label) { |
113 | label = nullptr; |
114 | emit q->labelChanged(); |
115 | } |
116 | } |
117 | |
118 | QQuickGroupBox::QQuickGroupBox(QQuickItem *parent) |
119 | : QQuickFrame(*(new QQuickGroupBoxPrivate), parent) |
120 | { |
121 | } |
122 | |
123 | QQuickGroupBox::~QQuickGroupBox() |
124 | { |
125 | Q_D(QQuickGroupBox); |
126 | d->removeImplicitSizeListener(item: d->label); |
127 | } |
128 | |
129 | /*! |
130 | \qmlproperty string QtQuick.Controls::GroupBox::title |
131 | |
132 | This property holds the title. |
133 | |
134 | The title is typically displayed above the groupbox to |
135 | summarize its contents. |
136 | */ |
137 | QString QQuickGroupBox::title() const |
138 | { |
139 | Q_D(const QQuickGroupBox); |
140 | return d->title; |
141 | } |
142 | |
143 | void QQuickGroupBox::setTitle(const QString &title) |
144 | { |
145 | Q_D(QQuickGroupBox); |
146 | if (d->title == title) |
147 | return; |
148 | |
149 | d->title = title; |
150 | maybeSetAccessibleName(name: title); |
151 | emit titleChanged(); |
152 | } |
153 | |
154 | /*! |
155 | \qmlproperty Item QtQuick.Controls::GroupBox::label |
156 | |
157 | This property holds the label item that visualizes \l title. |
158 | |
159 | \sa {Customizing GroupBox} |
160 | */ |
161 | QQuickItem *QQuickGroupBox::label() const |
162 | { |
163 | QQuickGroupBoxPrivate *d = const_cast<QQuickGroupBoxPrivate *>(d_func()); |
164 | if (!d->label) |
165 | d->executeLabel(); |
166 | return d->label; |
167 | } |
168 | |
169 | void QQuickGroupBox::setLabel(QQuickItem *label) |
170 | { |
171 | Q_D(QQuickGroupBox); |
172 | if (d->label == label) |
173 | return; |
174 | |
175 | QQuickControlPrivate::warnIfCustomizationNotSupported(control: this, item: label, QStringLiteral("label")); |
176 | |
177 | if (!d->label.isExecuting()) |
178 | d->cancelLabel(); |
179 | |
180 | const qreal oldImplicitLabelWidth = implicitLabelWidth(); |
181 | const qreal oldImplicitLabelHeight = implicitLabelHeight(); |
182 | |
183 | d->removeImplicitSizeListener(item: d->label); |
184 | QQuickControlPrivate::hideOldItem(item: d->label); |
185 | d->label = label; |
186 | |
187 | if (label) { |
188 | if (!label->parentItem()) |
189 | label->setParentItem(this); |
190 | d->addImplicitSizeListener(item: label); |
191 | } |
192 | |
193 | if (!qFuzzyCompare(p1: oldImplicitLabelWidth, p2: implicitLabelWidth())) |
194 | emit implicitLabelWidthChanged(); |
195 | if (!qFuzzyCompare(p1: oldImplicitLabelHeight, p2: implicitLabelHeight())) |
196 | emit implicitLabelHeightChanged(); |
197 | if (!d->label.isExecuting()) |
198 | emit labelChanged(); |
199 | } |
200 | |
201 | /*! |
202 | \since QtQuick.Controls 2.5 (Qt 5.12) |
203 | \qmlproperty real QtQuick.Controls::GroupBox::implicitLabelWidth |
204 | \readonly |
205 | |
206 | This property holds the implicit label width. |
207 | |
208 | The value is equal to \c {label ? label.implicitWidth : 0}. |
209 | |
210 | \sa implicitLabelHeight |
211 | */ |
212 | qreal QQuickGroupBox::implicitLabelWidth() const |
213 | { |
214 | Q_D(const QQuickGroupBox); |
215 | if (!d->label) |
216 | return 0; |
217 | return d->label->implicitWidth(); |
218 | } |
219 | |
220 | /*! |
221 | \since QtQuick.Controls 2.5 (Qt 5.12) |
222 | \qmlproperty real QtQuick.Controls::GroupBox::implicitLabelHeight |
223 | \readonly |
224 | |
225 | This property holds the implicit label height. |
226 | |
227 | The value is equal to \c {label ? label.implicitHeight : 0}. |
228 | |
229 | \sa implicitLabelWidth |
230 | */ |
231 | qreal QQuickGroupBox::implicitLabelHeight() const |
232 | { |
233 | Q_D(const QQuickGroupBox); |
234 | if (!d->label) |
235 | return 0; |
236 | return d->label->implicitHeight(); |
237 | } |
238 | |
239 | void QQuickGroupBox::componentComplete() |
240 | { |
241 | Q_D(QQuickGroupBox); |
242 | d->executeLabel(complete: true); |
243 | QQuickFrame::componentComplete(); |
244 | } |
245 | |
246 | QFont QQuickGroupBox::defaultFont() const |
247 | { |
248 | return QQuickTheme::font(scope: QQuickTheme::GroupBox); |
249 | } |
250 | |
251 | #if QT_CONFIG(accessibility) |
252 | QAccessible::Role QQuickGroupBox::accessibleRole() const |
253 | { |
254 | return QAccessible::Grouping; |
255 | } |
256 | |
257 | void QQuickGroupBox::accessibilityActiveChanged(bool active) |
258 | { |
259 | Q_D(QQuickGroupBox); |
260 | QQuickFrame::accessibilityActiveChanged(active); |
261 | |
262 | if (active) |
263 | maybeSetAccessibleName(name: d->title); |
264 | } |
265 | #endif |
266 | |
267 | QT_END_NAMESPACE |
268 | |
269 | #include "moc_qquickgroupbox_p.cpp" |
270 |
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