Qt 属性和QGraphicsSimpleTextItem
我想知道我们是否可以在继承QGraphicsSimpleTextItem的类中使用属性来设置动画 我正在画这个按钮: 它由以下部分组成:Qt 属性和QGraphicsSimpleTextItem,qt,properties,qgraphicssimpletextitem,Qt,Properties,Qgraphicssimpletextitem,我想知道我们是否可以在继承QGraphicsSimpleTextItem的类中使用属性来设置动画 我正在画这个按钮: 它由以下部分组成: 一个圆,它继承QGraphicsObject并替代几何体特性 椭圆,基本相同,但以圆为母 继承QObject和QGraphicsSimpleTextItem 对于前两个,动画可以工作。但关于最后一个问题,我有以下错误: QPropertyAnimation: you're trying to animate a non-existing property
- 一个圆,它继承QGraphicsObject并替代几何体特性
- 椭圆,基本相同,但以圆为母
- 继承QObject和QGraphicsSimpleTextItem
QPropertyAnimation: you're trying to animate a non-existing property localisation of your QObject
QPropertyAnimation: you're trying to animate a non-existing property localisation of your QObject
QPropertyAnimation: you're trying to animate a non-existing property sizePolicy of your QObject
QPropertyAnimation: you're trying to animate a non-existing property sizePolicy of your QObject
这是我的课程“MyText”:
class MyTextOk : public QObject, public QGraphicsSimpleTextItem
{
Q_PROPERTY(QPointF localisation READ localisation WRITE setLocalisation)
Q_PROPERTY(QFont sizePolicy READ sizePolicy WRITE setSizePolicy)
public:
explicit MyTextOk(QGraphicsObject *parent = 0);
~MyTextOk();
QPointF localisation() const;
void setLocalisation(const QPointF &value);
QFont sizePolicy() const;
void setSizePolicy(const QFont &value);
private:
QRectF boundingRect() const;
protected :
QPointF point;
QFont font;
};
还有我的
QVariant myFontInterpolator(const QFont &start, const QFont &end, qreal progress)
{
if (progress<0.5)
{
int a = (1-progress)*50 + progress*45;
QFont rt(start);
rt.setPointSize(a);
return rt;
}
else
{
int a = (1-progress)*45 + progress*50;
QFont rt(start);
rt.setPointSize(a);
return rt;
}
Q_UNUSED(end)
}
MyTextOk::MyTextOk(QGraphicsObject *parent)
: QObject(parent), QGraphicsSimpleTextItem(parent)
{
point = QPointF(-40,-45);
this->setText("Ok");
this->setPos(point);
this->setBrush(QBrush(Qt::white));
font = QFont("Colibri",50);
this->setFont(font);
qRegisterAnimationInterpolator<QFont>(myFontInterpolator);
}
MyTextOk::~MyTextOk()
{
}
QPointF MyTextOk::localisation() const
{
return point;
}
void MyTextOk::setLocalisation(const QPointF &value)
{
if(point!=value)
{
point = value;
update();
}
}
QFont MyTextOk::sizePolicy() const
{
return font;
}
void MyTextOk::setSizePolicy(const QFont &value)
{
if(font!=value)
{
font=value;
update();
}
}
QRectF MyTextOk::boundingRect() const
{
return QRectF(0,0,0,0);
}
我不知道是否可以命名我自己的属性,但我不能(?)重写font
和pos
属性,因为我继承了QGraphicsSimpleTextItem并使用setFont()
和setPos()
如果您想尝试,您可以找到所有代码
谢谢您的时间。问题已解决
MyTextOk
类定义中的Q_对象
宏丢失。放置后,代码运行良好
您可以找到我的按钮的一个工作示例。我想您只是缺少了
MyTextOk
类定义中的Q_对象
宏。虽然我很惊讶没有收到来自moc
的任何警告。哦,我讨厌我的生活。真的!我没有更多的错误,但动画仍然无用。如果我有消息,我会回来的谢谢你,一切顺利。我们只需要调用pos和字体属性就可以了。这个Q_对象的疏忽让我产生了错误的想法。请将解决方案作为答案发布(确保链接中的相关内容包含在答案中),而不是作为问题的更新。这是为了帮助未来的游客,减少混乱。谢谢。完成了,谢谢你的建议。这比编辑更清楚你是对的。
void MainWindow::lancerAnimBoutonRond()
{
animationBoutonRondTaille = new QPropertyAnimation(roundButton, "geometry");
animationBoutonRondTaille->setDuration(300);
animationBoutonRondTaille->setKeyValueAt(0, QRectF(-90, -90, 180, 180));
animationBoutonRondTaille->setKeyValueAt(0.5, QRectF(-85,-85,170,170));
animationBoutonRondTaille->setKeyValueAt(1, QRectF(-90, -90, 180, 180));
animationBoutonRondTaille -> start();
animationBoutonRondEllipse = new QPropertyAnimation(whiteShadow, "geometry");
animationBoutonRondEllipse->setDuration(300);
animationBoutonRondEllipse->setKeyValueAt(0,QRectF(-70,-80,140,80));
animationBoutonRondEllipse->setKeyValueAt(0.5,QRectF(-65,-75,130,90));
animationBoutonRondEllipse->setKeyValueAt(1,QRectF(-70,-80,140,80));
animationBoutonRondEllipse->start(); // These two work
animationBoutonRondOk = new QPropertyAnimation(textOk,"localisation");
animationBoutonRondOk->setDuration(300);
animationBoutonRondOk->setKeyValueAt(0,QPointF(-40,-45));
animationBoutonRondOk->setKeyValueAt(0.5,QPointF(-35, -40));
animationBoutonRondOk->setKeyValueAt(1,QPointF(-40, -45));
animationBoutonRondOk->start(); //error : QPropertyAnimation: you're trying to animate a non-existing property localisation of your QObject
animationBoutonRondOkTaille = new QPropertyAnimation(textOk,"sizePolicy");
animationBoutonRondOkTaille->setDuration(300);
animationBoutonRondOkTaille->setStartValue(QFont("Colibri",50));
animationBoutonRondOkTaille->setEndValue(QFont("Colibri",50));
animationBoutonRondOkTaille->start(); //error : 'QPropertyAnimation: you're trying to animate a non-existing property sizePolicy of your QObject'
}