我有以下代码。
void mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
if(mousePressed==true){
if(!rectangle){
rectangle=new QGraphicsRectItem;
this->addItem(rectangle);
rectangle->setPen(QPen(Qt::red,4,Qt::SolidLine));
rectangle->setPos(origPoint);
}
float top = qMin(origPoint.y(), event->scenePos().y());
float left = qMin(origPoint.x(), event->scenePos().x());
rectangle->setPos(left, top);
rectangle->setRect(0, 0, qAbs(event->scenePos().x() - origPoint.x()),
qAbs(event->scenePos().y() - origPoint.y()));
qDebug() << top << left << origPoint << event->scenePos();
}
else
QGraphicsScene::mouseMoveEvent(event);
}
directive .directive('area', function () {
return {
link: function (scope, el, attrs) {
var fileReader = new FileReader();
fileReader.onload = function (e) {
scope.image = e.target.result;
scope.$apply();
}
el.on('change', function () {
fileReader.readAsDataURL(el[0].files[0]);
});
}
};
});
controller当我将图像添加到文件输入时，我得到以下错误
.controller('areaController',
['$scope',
function ($scope) {
$scope.image = "";
}
]
);
答案 0 :(得分：1)
我猜您应该将其修改为
el.on('change', function (e) {
var files = (e.srcElement || e.target).files
fileReader.readAsDataURL(files[0]);
});