| 1 | // Copyright (C) 2023 The Qt Company Ltd. |
|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only |
|---|
| 3 | |
|---|
| 4 | #include "qblendtreenode_p.h" |
|---|
| 5 | |
|---|
| 6 | QT_BEGIN_NAMESPACE |
|---|
| 7 | |
|---|
| 8 | /*! |
|---|
| 9 | \qmltype BlendTreeNode |
|---|
| 10 | \inherits QObject |
|---|
| 11 | \nativetype QBlendTreeNode |
|---|
| 12 | \inqmlmodule QtQuick.Timeline.BlendTrees |
|---|
| 13 | \ingroup qtqmltypes |
|---|
| 14 | |
|---|
| 15 | \brief Base class for all blend tree nodes. |
|---|
| 16 | |
|---|
| 17 | BlendTreeNode is the base class for all blend tree nodes. It is not |
|---|
| 18 | intended to be used directly, but rather to be subclassed to create |
|---|
| 19 | custom blend tree nodes. |
|---|
| 20 | */ |
|---|
| 21 | |
|---|
| 22 | /*! |
|---|
| 23 | \qmlproperty bool BlendTreeNode::outputEnabled |
|---|
| 24 | |
|---|
| 25 | This property determines whether the blend tree node should commit |
|---|
| 26 | the property changes. The default value is /c false. |
|---|
| 27 | |
|---|
| 28 | Any node can be an output node which commits the property changes, |
|---|
| 29 | but it should usually be the last node in the blend tree. If multiple |
|---|
| 30 | nodes are outputting data and there is a conflict, then the last |
|---|
| 31 | property change will be used. So ideally if there are multiple output |
|---|
| 32 | nodes in a tree, the targets and properties effected should be disjoint. |
|---|
| 33 | */ |
|---|
| 34 | |
|---|
| 35 | QBlendTreeNode::QBlendTreeNode(QObject *parent) |
|---|
| 36 | : QObject{parent} |
|---|
| 37 | { |
|---|
| 38 | connect(sender: this, signal: &QBlendTreeNode::frameDataChanged, context: this, slot: &QBlendTreeNode::handleFrameDataChanged); |
|---|
| 39 | connect(sender: this, signal: &QBlendTreeNode::outputEnabledChanged, context: this, slot: &QBlendTreeNode::handleFrameDataChanged); |
|---|
| 40 | } |
|---|
| 41 | |
|---|
| 42 | const QHash<QQmlProperty, QVariant> &QBlendTreeNode::frameData() |
|---|
| 43 | { |
|---|
| 44 | return m_frameData; |
|---|
| 45 | } |
|---|
| 46 | |
|---|
| 47 | bool QBlendTreeNode::outputEnabled() const |
|---|
| 48 | { |
|---|
| 49 | return m_outputEnabled; |
|---|
| 50 | } |
|---|
| 51 | |
|---|
| 52 | void QBlendTreeNode::setOutputEnabled(bool isOutputEnabled) |
|---|
| 53 | { |
|---|
| 54 | if (m_outputEnabled == isOutputEnabled) |
|---|
| 55 | return; |
|---|
| 56 | m_outputEnabled = isOutputEnabled; |
|---|
| 57 | Q_EMIT outputEnabledChanged(); |
|---|
| 58 | } |
|---|
| 59 | |
|---|
| 60 | void QBlendTreeNode::handleFrameDataChanged() |
|---|
| 61 | { |
|---|
| 62 | // If we are not outputting data, then there is nothing to do |
|---|
| 63 | if (!m_outputEnabled) |
|---|
| 64 | return; |
|---|
| 65 | |
|---|
| 66 | // Commit the property |
|---|
| 67 | for (auto it = m_frameData.cbegin(), end = m_frameData.cend(); it != end; ++it) { |
|---|
| 68 | const auto &property = it.key(); |
|---|
| 69 | property.write(it.value()); |
|---|
| 70 | } |
|---|
| 71 | } |
|---|
| 72 | |
|---|
| 73 | QT_END_NAMESPACE |
|---|
| 74 | |
|---|
