diff options
author | Lars Knoll <lars.knoll@qt.io> | 2020-08-18 12:18:27 +0200 |
---|---|---|
committer | Lars Knoll <lars.knoll@qt.io> | 2020-09-02 22:44:29 +0200 |
commit | 1e1b88809261854dee47c9bc105cf71e75b75cb9 (patch) | |
tree | fe99be6a3049500a2fc50d752a51076a1d4f5a0f /src | |
parent | 3b3b190eef036ffefb5275e6f03e9f933d3609ff (diff) |
Pass a pointer to the property data into the method evaluating a binding
Make it possible to evaluate the binding but write the result into
a different memory location. This will help support compat properties,
where the setter does a lot of additional work.
Change-Id: Ib60220eb629e3dcb5c0d7004b693e92290dfabe5
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Diffstat (limited to 'src')
-rw-r--r-- | src/corelib/kernel/qproperty.cpp | 17 | ||||
-rw-r--r-- | src/corelib/kernel/qproperty.h | 4 | ||||
-rw-r--r-- | src/corelib/kernel/qproperty_p.h | 2 | ||||
-rw-r--r-- | src/corelib/kernel/qpropertyprivate.h | 5 |
4 files changed, 16 insertions, 12 deletions
diff --git a/src/corelib/kernel/qproperty.cpp b/src/corelib/kernel/qproperty.cpp index 52bf9f33e6..b39b4c1c33 100644 --- a/src/corelib/kernel/qproperty.cpp +++ b/src/corelib/kernel/qproperty.cpp @@ -88,7 +88,7 @@ void QPropertyBindingPrivate::markDirtyAndNotifyObservers() staticObserverCallback(propertyDataPtr); } -bool QPropertyBindingPrivate::evaluateIfDirtyAndReturnTrueIfValueChanged() +bool QPropertyBindingPrivate::evaluateIfDirtyAndReturnTrueIfValueChanged(const QUntypedPropertyData *data) { if (!dirty) return false; @@ -113,10 +113,13 @@ bool QPropertyBindingPrivate::evaluateIfDirtyAndReturnTrueIfValueChanged() bool changed = false; + Q_ASSERT(propertyDataPtr == data); + QUntypedPropertyData *mutable_data = const_cast<QUntypedPropertyData *>(data); + if (hasBindingWrapper) { changed = staticBindingWrapper(metaType, propertyDataPtr, evaluationFunction); } else { - changed = evaluationFunction(metaType, propertyDataPtr); + changed = evaluationFunction(metaType, mutable_data); } dirty = false; @@ -300,13 +303,13 @@ QPropertyBindingPrivate *QPropertyBindingPrivate::currentlyEvaluatingBinding() return currentBindingEvaluationState ? currentBindingEvaluationState->binding : nullptr; } -void QPropertyBindingData::evaluateIfDirty() const +void QPropertyBindingData::evaluateIfDirty(const QUntypedPropertyData *property) const { QPropertyBindingDataPointer d{this}; QPropertyBindingPrivate *binding = d.bindingPtr(); if (!binding) return; - binding->evaluateIfDirtyAndReturnTrueIfValueChanged(); + binding->evaluateIfDirtyAndReturnTrueIfValueChanged(property); } void QPropertyBindingData::removeBinding() @@ -452,7 +455,7 @@ void QPropertyObserverPointer::notify(QPropertyBindingPrivate *triggeringBinding if (!knownIfPropertyChanged && triggeringBinding) { knownIfPropertyChanged = true; - propertyChanged = triggeringBinding->evaluateIfDirtyAndReturnTrueIfValueChanged(); + propertyChanged = triggeringBinding->evaluateIfDirtyAndReturnTrueIfValueChanged(propertyDataPtr); } if (!propertyChanged) return; @@ -1446,6 +1449,7 @@ struct QBindingStoragePrivate QBindingStorage::QBindingStorage() { currentlyEvaluatingBinding = ¤tBindingEvaluationState; + Q_ASSERT(currentlyEvaluatingBinding); } QBindingStorage::~QBindingStorage() @@ -1455,6 +1459,7 @@ QBindingStorage::~QBindingStorage() void QBindingStorage::maybeUpdateBindingAndRegister(const QUntypedPropertyData *data) const { + Q_ASSERT(currentlyEvaluatingBinding); QUntypedPropertyData *dd = const_cast<QUntypedPropertyData *>(data); auto storage = *currentlyEvaluatingBinding ? QBindingStoragePrivate(d).getAndCreate(dd) : @@ -1462,7 +1467,7 @@ void QBindingStorage::maybeUpdateBindingAndRegister(const QUntypedPropertyData * if (!storage) return; if (auto *binding = storage->binding()) - binding->evaluateIfDirtyAndReturnTrueIfValueChanged(); + binding->evaluateIfDirtyAndReturnTrueIfValueChanged(const_cast<QUntypedPropertyData *>(data)); storage->registerWithCurrentlyEvaluatingBinding(); } diff --git a/src/corelib/kernel/qproperty.h b/src/corelib/kernel/qproperty.h index 14319f0382..c54d99f131 100644 --- a/src/corelib/kernel/qproperty.h +++ b/src/corelib/kernel/qproperty.h @@ -67,7 +67,7 @@ template <typename T> class QPropertyData : public QUntypedPropertyData { protected: - T val = T(); + mutable T val = T(); private: class DisableRValueRefs {}; protected: @@ -341,7 +341,7 @@ public: parameter_type value() const { if (d.hasBinding()) - d.evaluateIfDirty(); + d.evaluateIfDirty(this); d.registerWithCurrentlyEvaluatingBinding(); return this->val; } diff --git a/src/corelib/kernel/qproperty_p.h b/src/corelib/kernel/qproperty_p.h index fbc9a072c3..6c53101129 100644 --- a/src/corelib/kernel/qproperty_p.h +++ b/src/corelib/kernel/qproperty_p.h @@ -230,7 +230,7 @@ public: void unlinkAndDeref(); void markDirtyAndNotifyObservers(); - bool evaluateIfDirtyAndReturnTrueIfValueChanged(); + bool evaluateIfDirtyAndReturnTrueIfValueChanged(const QUntypedPropertyData *data); static QPropertyBindingPrivate *get(const QUntypedPropertyBinding &binding) { return binding.d.data(); } diff --git a/src/corelib/kernel/qpropertyprivate.h b/src/corelib/kernel/qpropertyprivate.h index 6f0e563a28..15e54e9ba8 100644 --- a/src/corelib/kernel/qpropertyprivate.h +++ b/src/corelib/kernel/qpropertyprivate.h @@ -87,10 +87,9 @@ class Q_CORE_EXPORT QPropertyBindingData // notification later when the value changes. mutable quintptr d_ptr = 0; friend struct QT_PREPEND_NAMESPACE(QPropertyBindingDataPointer); + Q_DISABLE_COPY(QPropertyBindingData) public: QPropertyBindingData() = default; - Q_DISABLE_COPY(QPropertyBindingData) - QPropertyBindingData(QPropertyBindingData &&other) = delete; QPropertyBindingData(QPropertyBindingData &&other, QUntypedPropertyData *propertyDataPtr); QPropertyBindingData &operator=(QPropertyBindingData &&other) = delete; ~QPropertyBindingData(); @@ -105,7 +104,7 @@ public: QPropertyBindingWrapper guardCallback = nullptr); QPropertyBindingPrivate *binding() const; - void evaluateIfDirty() const; + void evaluateIfDirty(const QUntypedPropertyData *property) const; void removeBinding(); void registerWithCurrentlyEvaluatingBinding() const; |