技術標籤：QtQt學習拖拽

#pragma once

#include <QtWidgets/Qwidget>
#include <QLineEdit>
#include <QDropEvent>
#include <QMimeData>
#include <QDragEnterEvent>

class CustomLineEdit : public QLineEdit
{
	Q_OBJECT

public:
	CustomLineEdit(QWidget *parent = nullptr);
	~CustomLineEdit();

protected:
	///< 拖動檔案到視窗 觸發
	void dragEnterEvent(QDragEnterEvent *event); 
	///< 拖動檔案到視窗移動檔案 觸發
	void dragMoveEvent(QDragMoveEvent *event);	
	///< 拖動檔案到視窗釋放檔案觸發
	void dropEvent(QDropEvent *event);	
};

 

#include "CustomLineEdit.h"

CustomLineEdit::CustomLineEdit(QWidget *parent) : QLineEdit(parent)
{
	setAcceptDrops(true);
}

CustomLineEdit::~CustomLineEdit()
{

}

void CustomLineEdit::dragEnterEvent(QDragEnterEvent *event)
{
	if (event->mimeData()->hasUrls())
		event->acceptProposedAction(); //事件資料中存在路徑，方向事件
	else
		event->ignore();
}

void CustomLineEdit::dragMoveEvent(QDragMoveEvent *event)
{

}

void CustomLineEdit::dropEvent(QDropEvent *event)
{
	const QMimeData *mimeData = event->mimeData();
	if (mimeData->hasUrls())
	{
		QList<QUrl> urls = mimeData->urls();
		QString fileName = urls.at(0).toLocalFile();
		setText(fileName);
		event->accept();
	}
	else
	{
		event->ignore();
	}
}
 

執行結果：