上海高登联合建设网站,亳州建设网站,做网站放广告,高端网站设计费用1.相关说明 重写resizeEvent(这个按需重写)、dragEnterEvent(拖拽事件函数)、dropEvent(放下事件函数)#xff0c;可以将本地图片拖拽到label标签中 2.相关界面 3.相关代码
#include widget.h
#include ui_widget.h
#include QDragEnterEvent可以将本地图片拖拽到label标签中 2.相关界面 3.相关代码
#include widget.h
#include ui_widget.h
#include QDragEnterEvent
#include QMimeData
#include QFileInfoWidget::Widget(QWidget *parent): QWidget(parent), ui(new Ui::Widget)
{ui-setupUi(this);setAcceptDrops(true);ui-plainTextEdit-setAcceptDrops(false);ui-label-setAcceptDrops(false);ui-label-setScaledContents(true);
}Widget::~Widget()
{delete ui;
}void Widget::resizeEvent(QResizeEvent *event)
{QSize sz ui-plainTextEdit-size();ui-plainTextEdit-move(5, 5);ui-label-move(5, sz.height()10);ui-plainTextEdit-resize(this-width()-10, sz.height());ui-label-resize(this-width()-10, this-height()-sz.height()-20);event-accept();
}void Widget::dropEvent(QDropEvent *event)
{QString fullPath event-mimeData()-urls().at(0).path();fullPath fullPath.right(fullPath.length()-1);QPixmap pixmap(fullPath);ui-label-setPixmap(pixmap);event-accept();
}void Widget::dragEnterEvent(QDragEnterEvent *event)
{ui-plainTextEdit-clear();ui-plainTextEdit-appendPlainText(dragEvent事件mimeData的format:);for(auto item : event-mimeData()-formats()){ui-plainTextEdit-appendPlainText(item);}ui-plainTextEdit-appendPlainText(dragEvent事件mimeData的urls:);for(auto item : event-mimeData()-urls()){ui-plainTextEdit-appendPlainText(item.path());}if(event-mimeData()-hasUrls()){QString filename event-mimeData()-urls().at(0).fileName();QFileInfo fileInfo(filename);QString ex fileInfo.suffix().toUpper();if(ex JPG){event-acceptProposedAction();} else {event-ignore();}} else {event-ignore();}
}
