qml扩展插件的创建与使用（仅C++插件） 测试源码

#include "myitem.h" #include <QPainter> MyItem::MyItem(QQuickItem *parent) : QQuickPaintedItem(parent) { // By default, QQuickItem does not draw anything. If you subclass // QQuickItem to create a visual item, you will need to uncomment the // following line and re-implement updatePaintNode() // setFlag(ItemHasContents, true); } MyItem::~MyItem() { } QString MyItem::name() const { return m_name; } void MyItem::setName(const QString &name) { m_name = name; } QColor MyItem::color() const { return m_color; } void MyItem::setColor(const QColor &color) { m_color = color; } void MyItem::paint(QPainter *painter) { QPen pen(m_color, 2); painter->setPen(pen); painter->setRenderHints(QPainter::Antialiasing, true); painter->drawPie(boundingRect().adjusted(1, 1, -1, -1), 90 * 16, 290 * 16); } void MyItem::clearChart() { setColor(QColor(Qt::transparent)); update(); emit chartCleared(); }