diff options
author | J-P Nurmi <jpnurmi@qt.io> | 2017-11-08 10:36:00 +0100 |
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committer | J-P Nurmi <jpnurmi@qt.io> | 2017-11-08 10:13:55 +0000 |
commit | 03155ec2e2fd6cc60b4293af19964d2e1a65b7d9 (patch) | |
tree | 9aacfeca5df6f8e65ee3f66d8434bed392733b96 /src/quicktemplates2/qquickcheckdelegate.cpp | |
parent | f246314b21604c5fe2a2abe0aec8af89f06eb610 (diff) |
Expose QQuickCheckDelegate::nextCheckState() to QML
Same as 043e3d24 for CheckBox.
[ChangeLog][Controls][CheckDelegate] Made it possible to implement
nextCheckState() in QML.
Task-number: QTBUG-63238
Change-Id: Id765191b1e5559393696183ffea9ed9c69eed475
Reviewed-by: Liang Qi <liang.qi@qt.io>
Diffstat (limited to 'src/quicktemplates2/qquickcheckdelegate.cpp')
-rw-r--r-- | src/quicktemplates2/qquickcheckdelegate.cpp | 50 |
1 files changed, 49 insertions, 1 deletions
diff --git a/src/quicktemplates2/qquickcheckdelegate.cpp b/src/quicktemplates2/qquickcheckdelegate.cpp index 78d55e1d..9fd8c183 100644 --- a/src/quicktemplates2/qquickcheckdelegate.cpp +++ b/src/quicktemplates2/qquickcheckdelegate.cpp @@ -38,6 +38,7 @@ #include "qquickitemdelegate_p_p.h" #include <QtGui/qpa/qplatformtheme.h> +#include <QtQml/qjsvalue.h> QT_BEGIN_NAMESPACE @@ -94,10 +95,20 @@ public: { } + void setNextCheckState(const QJSValue &callback); + bool tristate; Qt::CheckState checkState; + QJSValue nextCheckState; }; +void QQuickCheckDelegatePrivate::setNextCheckState(const QJSValue &callback) +{ + Q_Q(QQuickCheckDelegate); + nextCheckState = callback; + emit q->nextCheckStateChanged(); +} + QQuickCheckDelegate::QQuickCheckDelegate(QQuickItem *parent) : QQuickItemDelegate(*(new QQuickCheckDelegatePrivate), parent) { @@ -179,10 +190,45 @@ void QQuickCheckDelegate::buttonChange(ButtonChange change) QQuickAbstractButton::buttonChange(change); } +/*! + \since QtQuick.Controls 2.4 (Qt 5.11) + \qmlproperty function QtQuick.Controls::CheckDelegate::nextCheckState + + This property holds a callback function that is called to determine + the next check state whenever the check delegate is interactively toggled + by the user via touch, mouse, or keyboard. + + By default, a normal check delegate cycles between \c Qt.Unchecked and + \c Qt.Checked states, and a tri-state check delegate cycles between + \c Qt.Unchecked, \c Qt.PartiallyChecked, and \c Qt.Checked states. + + The \c nextCheckState callback function can override the default behavior. + The following example implements a tri-state check delegate that can present + a partially checked state depending on external conditions, but never + cycles to the partially checked state when interactively toggled by + the user. + + \code + CheckDelegate { + tristate: true + checkState: allChildrenChecked ? Qt.Checked : + anyChildChecked ? Qt.PartiallyChecked : Qt.Unchecked + + nextCheckState: function() { + if (checkState === Qt.Checked) + return Qt.Unchecked + else + return Qt.Checked + } + } + \endcode +*/ void QQuickCheckDelegate::nextCheckState() { Q_D(QQuickCheckDelegate); - if (d->tristate) + if (d->nextCheckState.isCallable()) + setCheckState(static_cast<Qt::CheckState>(d->nextCheckState.call().toInt())); + else if (d->tristate) setCheckState(static_cast<Qt::CheckState>((d->checkState + 1) % 3)); else QQuickItemDelegate::nextCheckState(); @@ -196,3 +242,5 @@ QAccessible::Role QQuickCheckDelegate::accessibleRole() const #endif QT_END_NAMESPACE + +#include "moc_qquickcheckdelegate_p.cpp" |