#!/usr/bin/env python

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"""PySide2 port of the widgets/draganddrop/draggabletext example from Qt v5.x, originating from PyQt"""

from PySide2.QtCore import QFile, QIODevice, QMimeData, QPoint, Qt, QTextStream
from PySide2.QtGui import QDrag, QPalette, QPixmap
from PySide2.QtWidgets import QApplication, QFrame, QLabel, QWidget

import draggabletext_rc


class DragLabel(QLabel):
    def __init__(self, text, parent):
        super(DragLabel, self).__init__(text, parent)

        self.setAutoFillBackground(True)
        self.setFrameShape(QFrame.Panel)
        self.setFrameShadow(QFrame.Raised)

    def mousePressEvent(self, event):
        hotSpot = event.pos()

        mimeData = QMimeData()
        mimeData.setText(self.text())
        mimeData.setData('application/x-hotspot',
                b'%d %d' % (hotSpot.x(), hotSpot.y()))

        pixmap = QPixmap(self.size())
        self.render(pixmap)

        drag = QDrag(self)
        drag.setMimeData(mimeData)
        drag.setPixmap(pixmap)
        drag.setHotSpot(hotSpot)

        dropAction = drag.exec_(Qt.CopyAction | Qt.MoveAction, Qt.CopyAction)

        if dropAction == Qt.MoveAction:
            self.close()
            self.update()


class DragWidget(QWidget):
    def __init__(self, parent=None):
        super(DragWidget, self).__init__(parent)

        dictionaryFile = QFile(':/dictionary/words.txt')
        dictionaryFile.open(QIODevice.ReadOnly)

        x = 5
        y = 5

        for word in QTextStream(dictionaryFile).readAll().split():
            wordLabel = DragLabel(word, self)
            wordLabel.move(x, y)
            wordLabel.show()
            x += wordLabel.width() + 2
            if x >= 195:
                x = 5
                y += wordLabel.height() + 2

        newPalette = self.palette()
        newPalette.setColor(QPalette.Window, Qt.white)
        self.setPalette(newPalette)

        self.setAcceptDrops(True)
        self.setMinimumSize(400, max(200, y))
        self.setWindowTitle("Draggable Text")

    def dragEnterEvent(self, event):
        if event.mimeData().hasText():
            if event.source() in self.children():
                event.setDropAction(Qt.MoveAction)
                event.accept()
            else:
                event.acceptProposedAction()
        else:
            event.ignore()

    def dropEvent(self, event):
        if event.mimeData().hasText():
            mime = event.mimeData()
            pieces = mime.text().split()
            position = event.pos()
            hotSpot = QPoint()

            hotSpotPos = mime.data('application/x-hotspot').split(' ')
            if len(hotSpotPos) == 2:
               hotSpot.setX(hotSpotPos[0].toInt()[0])
               hotSpot.setY(hotSpotPos[1].toInt()[0])

            for piece in pieces:
                newLabel = DragLabel(piece, self)
                newLabel.move(position - hotSpot)
                newLabel.show()

                position += QPoint(newLabel.width(), 0)

            if event.source() in self.children():
                event.setDropAction(Qt.MoveAction)
                event.accept()
            else:
                event.acceptProposedAction()
        else:
            event.ignore()


if __name__ == '__main__':

    import sys

    app = QApplication(sys.argv)
    window = DragWidget()
    window.show()
    sys.exit(app.exec_())
