1#!/usr/bin/env python
2
3
4#############################################################################
5##
6## Copyright (C) 2013 Riverbank Computing Limited.
7## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
8## All rights reserved.
9##
10## This file is part of the examples of PyQt.
11##
12## $QT_BEGIN_LICENSE:BSD$
13## You may use this file under the terms of the BSD license as follows:
14##
15## "Redistribution and use in source and binary forms, with or without
16## modification, are permitted provided that the following conditions are
17## met:
18##   * Redistributions of source code must retain the above copyright
19##     notice, this list of conditions and the following disclaimer.
20##   * Redistributions in binary form must reproduce the above copyright
21##     notice, this list of conditions and the following disclaimer in
22##     the documentation and/or other materials provided with the
23##     distribution.
24##   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
25##     the names of its contributors may be used to endorse or promote
26##     products derived from this software without specific prior written
27##     permission.
28##
29## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
30## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
31## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
32## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
33## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
34## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
35## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
36## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
37## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
39## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
40## $QT_END_LICENSE$
41##
42#############################################################################
43
44
45from PyQt5.QtCore import QFile, QIODevice, QMimeData, QPoint, Qt, QTextStream
46from PyQt5.QtGui import QDrag, QPalette, QPixmap
47from PyQt5.QtWidgets import QApplication, QFrame, QLabel, QWidget
48
49import draggabletext_rc
50
51
52class DragLabel(QLabel):
53    def __init__(self, text, parent):
54        super(DragLabel, self).__init__(text, parent)
55
56        self.setAutoFillBackground(True)
57        self.setFrameShape(QFrame.Panel)
58        self.setFrameShadow(QFrame.Raised)
59
60    def mousePressEvent(self, event):
61        hotSpot = event.pos()
62
63        mimeData = QMimeData()
64        mimeData.setText(self.text())
65        mimeData.setData('application/x-hotspot',
66                '%d %d' % (hotSpot.x(), hotSpot.y()))
67
68        pixmap = QPixmap(self.size())
69        self.render(pixmap)
70
71        drag = QDrag(self)
72        drag.setMimeData(mimeData)
73        drag.setPixmap(pixmap)
74        drag.setHotSpot(hotSpot)
75
76        dropAction = drag.exec_(Qt.CopyAction | Qt.MoveAction, Qt.CopyAction)
77
78        if dropAction == Qt.MoveAction:
79            self.close()
80            self.update()
81
82
83class DragWidget(QWidget):
84    def __init__(self, parent=None):
85        super(DragWidget, self).__init__(parent)
86
87        dictionaryFile = QFile(':/dictionary/words.txt')
88        dictionaryFile.open(QIODevice.ReadOnly)
89
90        x = 5
91        y = 5
92
93        for word in QTextStream(dictionaryFile).readAll().split():
94            wordLabel = DragLabel(word, self)
95            wordLabel.move(x, y)
96            wordLabel.show()
97            x += wordLabel.width() + 2
98            if x >= 195:
99                x = 5
100                y += wordLabel.height() + 2
101
102        newPalette = self.palette()
103        newPalette.setColor(QPalette.Window, Qt.white)
104        self.setPalette(newPalette)
105
106        self.setAcceptDrops(True)
107        self.setMinimumSize(400, max(200, y))
108        self.setWindowTitle("Draggable Text")
109
110    def dragEnterEvent(self, event):
111        if event.mimeData().hasText():
112            if event.source() in self.children():
113                event.setDropAction(Qt.MoveAction)
114                event.accept()
115            else:
116                event.acceptProposedAction()
117        else:
118            event.ignore()
119
120    def dropEvent(self, event):
121        if event.mimeData().hasText():
122            mime = event.mimeData()
123            pieces = mime.text().split()
124            position = event.pos()
125            hotSpot = QPoint()
126
127            hotSpotPos = mime.data('application/x-hotspot').split(' ')
128            if len(hotSpotPos) == 2:
129               hotSpot.setX(hotSpotPos[0].toInt()[0])
130               hotSpot.setY(hotSpotPos[1].toInt()[0])
131
132            for piece in pieces:
133                newLabel = DragLabel(piece, self)
134                newLabel.move(position - hotSpot)
135                newLabel.show()
136
137                position += QPoint(newLabel.width(), 0)
138
139            if event.source() in self.children():
140                event.setDropAction(Qt.MoveAction)
141                event.accept()
142            else:
143                event.acceptProposedAction()
144        else:
145            event.ignore()
146
147
148if __name__ == '__main__':
149
150    import sys
151
152    app = QApplication(sys.argv)
153    window = DragWidget()
154    window.show()
155    sys.exit(app.exec_())
156