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** This file is part of the examples of the Qt Toolkit.
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module droparea;

import qt.gui.QLabel;

class DropArea : public QLabel
{
public:
	this(QWidget parent = null)
	{
		super(parent);

		setMinimumSize(200, 200);
		setFrameStyle(QFrame.Sunken | QFrame.StyledPanel);
		setAlignment(Qt.AlignCenter);
		setAcceptDrops(true);
		setAutoFillBackground(true);
		clearArea();
	}
   
	void clearArea()
	{
		setText(tr("<drop content>"));
		setBackgroundRole(QPalette.Dark);

		changed.emit(null);
	}

	mixin Signal!("changed", QMimeData);
	
protected:

	void dragEnterEvent(QDragEnterEvent event)
	{
		setText(tr("<drop content>"));
		setBackgroundRole(QPalette.Highlight);

		event.acceptProposedAction();
		changed.emit(event.mimeData);
	}
	
	void dragMoveEvent(QDragMoveEvent event)
	{
		event.acceptProposedAction();
	}
	
	void dragLeaveEvent(QDragLeaveEvent event)
	{
		clearArea();
		event.accept();
	}
	
	void dropEvent(QDropEvent event)
	{
		QMimeData mimeData = event.mimeData();

		if (mimeData.hasImage()) {
			setPixmap(new QPixmap(mimeData.imageData));
		} else if (mimeData.hasHtml()) {
			setText(mimeData.html());
			setTextFormat(Qt.RichText);
		} else if (mimeData.hasText()) {
			setText(mimeData.text());    
			setTextFormat(Qt.PlainText);
		} else if (mimeData.hasUrls()) {
			QUrl[] urlList = mimeData.urls();
			string text;
			for (int i = 0; i < urlList.length && i < 32; ++i) {
				text ~= urlList[i].path() ~ "\n";
			}
			setText(text);
		} else {
			setText(tr("Cannot display data"));
		}

		setBackgroundRole(QPalette.Dark);
		event.acceptProposedAction();
	}

private:
	QLabel label;
}