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29
30#include "declarativechartnode_p.h"
31#include "declarativeabstractrendernode_p.h"
32
33#include <QtQuick/QQuickWindow>
34#include <QtQuick/QSGImageNode>
35#include <QtQuick/QSGRendererInterface>
36
37#ifndef QT_NO_OPENGL
38# include "declarativeopenglrendernode_p.h"
39#endif
40
41QT_CHARTS_BEGIN_NAMESPACE
42
43// This node handles displaying of the chart itself
44DeclarativeChartNode::DeclarativeChartNode(QQuickWindow *window) :
45 QSGRootNode(),
46 m_window(window),
47 m_renderNode(nullptr),
48 m_imageNode(nullptr)
49{
50 // Create a DeclarativeRenderNode for correct QtQuick Backend
51#ifndef QT_NO_OPENGL
52 if (m_window->rendererInterface()->graphicsApi() == QSGRendererInterface::OpenGL)
53 m_renderNode = new DeclarativeOpenGLRenderNode(m_window);
54#endif
55
56 if (m_renderNode) {
57 m_renderNode->setFlag(OwnedByParent);
58 appendChildNode(node: m_renderNode);
59 m_renderNode->setRect(QRectF(0, 0, 0, 0)); // Hide child node by default
60 }
61}
62
63DeclarativeChartNode::~DeclarativeChartNode()
64{
65}
66
67// Must be called on render thread and in context
68void DeclarativeChartNode::createTextureFromImage(const QImage &chartImage)
69{
70 static auto const defaultTextureOptions = QQuickWindow::CreateTextureOptions(QQuickWindow::TextureHasAlphaChannel |
71 QQuickWindow::TextureOwnsGLTexture);
72
73 auto texture = m_window->createTextureFromImage(image: chartImage, options: defaultTextureOptions);
74 // Create Image node if needed
75 if (!m_imageNode) {
76 m_imageNode = m_window->createImageNode();
77 m_imageNode->setFlag(OwnedByParent);
78 m_imageNode->setOwnsTexture(true);
79 m_imageNode->setTexture(texture);
80 prependChildNode(node: m_imageNode);
81 } else {
82 m_imageNode->setTexture(texture);
83 }
84 if (!m_rect.isEmpty())
85 m_imageNode->setRect(m_rect);
86}
87
88void DeclarativeChartNode::setRect(const QRectF &rect)
89{
90 m_rect = rect;
91
92 if (m_imageNode)
93 m_imageNode->setRect(rect);
94}
95
96QT_CHARTS_END_NAMESPACE
97

source code of qtcharts/src/chartsqml2/declarativechartnode.cpp