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50 | |
51 | #include "spinner.h" |
52 | |
53 | #include <QtQuick/QQuickWindow> |
54 | #include <QtGui/QScreen> |
55 | #include <QtQuick/QSGSimpleTextureNode> |
56 | |
57 | #include <QtGui/QConicalGradient> |
58 | #include <QtGui/QPainter> |
59 | |
60 | class SpinnerNode : public QObject, public QSGTransformNode |
61 | { |
62 | Q_OBJECT |
63 | public: |
64 | SpinnerNode(QQuickWindow *window) |
65 | : m_rotation(0) |
66 | , m_spinning(false) |
67 | , m_window(window) |
68 | { |
69 | connect(sender: window, signal: &QQuickWindow::beforeRendering, receiver: this, slot: &SpinnerNode::maybeRotate, type: Qt::DirectConnection); |
70 | connect(sender: window, signal: &QQuickWindow::frameSwapped, receiver: this, slot: &SpinnerNode::maybeUpdate, type: Qt::DirectConnection); |
71 | |
72 | QImage image(":/scenegraph/threadedanimation/spinner.png" ); |
73 | m_texture = window->createTextureFromImage(image); |
74 | QSGSimpleTextureNode *textureNode = new QSGSimpleTextureNode(); |
75 | textureNode->setTexture(m_texture); |
76 | textureNode->setRect(x: 0, y: 0, w: image.width(), h: image.height()); |
77 | textureNode->setFiltering(QSGTexture::Linear); |
78 | appendChildNode(node: textureNode); |
79 | } |
80 | |
81 | ~SpinnerNode() override { |
82 | delete m_texture; |
83 | } |
84 | |
85 | void setSpinning(bool spinning) |
86 | { |
87 | m_spinning = spinning; |
88 | } |
89 | |
90 | public slots: |
91 | void maybeRotate() { |
92 | if (m_spinning) { |
93 | m_rotation += (360 / m_window->screen()->refreshRate()); |
94 | QMatrix4x4 matrix; |
95 | matrix.translate(x: 32, y: 32); |
96 | matrix.rotate(angle: m_rotation, x: 0, y: 0, z: 1); |
97 | matrix.translate(x: -32, y: -32); |
98 | setMatrix(matrix); |
99 | |
100 | // If we're inside a QQuickWidget, this call is necessary to ensure the widget gets updated. |
101 | m_window->update(); |
102 | } |
103 | } |
104 | |
105 | void maybeUpdate() { |
106 | if (m_spinning) { |
107 | m_window->update(); |
108 | } |
109 | } |
110 | |
111 | private: |
112 | qreal m_rotation; |
113 | bool m_spinning; |
114 | QSGTexture *m_texture; |
115 | QQuickWindow *m_window; |
116 | }; |
117 | |
118 | Spinner::Spinner() |
119 | : m_spinning(false) |
120 | { |
121 | setSize(QSize(64, 64)); |
122 | setFlag(flag: ItemHasContents); |
123 | } |
124 | |
125 | void Spinner::setSpinning(bool spinning) |
126 | { |
127 | if (spinning == m_spinning) |
128 | return; |
129 | m_spinning = spinning; |
130 | emit spinningChanged(); |
131 | update(); |
132 | } |
133 | |
134 | QSGNode *Spinner::updatePaintNode(QSGNode *old, UpdatePaintNodeData *) |
135 | { |
136 | SpinnerNode *n = static_cast<SpinnerNode *>(old); |
137 | if (!n) |
138 | n = new SpinnerNode(window()); |
139 | |
140 | n->setSpinning(m_spinning); |
141 | |
142 | return n; |
143 | } |
144 | |
145 | #include "spinner.moc" |
146 | |