#!/usr/bin/env python
#############################################################################
##
## Copyright (C) 2015 Riverbank Computing Limited.
## Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
## All rights reserved.
##
## This file is part of the examples of PyQt.
##
## $QT_BEGIN_LICENSE:BSD$
## You may use this file under the terms of the BSD license as follows:
##
## "Redistribution and use in source and binary forms, with or without
## modification, are permitted provided that the following conditions are
## met:
## * Redistributions of source code must retain the above copyright
## notice, this list of conditions and the following disclaimer.
## * Redistributions in binary form must reproduce the above copyright
## notice, this list of conditions and the following disclaimer in
## the documentation and/or other materials provided with the
## distribution.
## * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
## the names of its contributors may be used to endorse or promote
## products derived from this software without specific prior written
## permission.
##
## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
## $QT_END_LICENSE$
##
#############################################################################
from PyQt5.QtCore import (QEasingCurve, QFileInfo, QLineF, QMimeData,
QParallelAnimationGroup, QPoint, QPointF, QPropertyAnimation, qrand,
QRectF, qsrand, Qt, QTime)
from PyQt5.QtGui import (QBrush, QColor, QDrag, QImage, QPainter, QPen,
QPixmap, QTransform)
from PyQt5.QtWidgets import (QApplication, QGraphicsItem, QGraphicsObject,
QGraphicsScene, QGraphicsView)
class ColorItem(QGraphicsItem):
n = 0
def __init__(self):
super(ColorItem, self).__init__()
self.color = QColor(qrand() % 256, qrand() % 256, qrand() % 256)
self.setToolTip(
"QColor(%d, %d, %d)\nClick and drag this color onto the robot!" %
(self.color.red(), self.color.green(), self.color.blue())
)
self.setCursor(Qt.OpenHandCursor)
self.setAcceptedMouseButtons(Qt.LeftButton)
def boundingRect(self):
return QRectF(-15.5, -15.5, 34, 34)
def paint(self, painter, option, widget):
painter.setPen(Qt.NoPen)
painter.setBrush(Qt.darkGray)
painter.drawEllipse(-12, -12, 30, 30)
painter.setPen(QPen(Qt.black, 1))
painter.setBrush(QBrush(self.color))
painter.drawEllipse(-15, -15, 30, 30)
def mousePressEvent(self, event):
self.setCursor(Qt.ClosedHandCursor)
def mouseMoveEvent(self, event):
if QLineF(QPointF(event.screenPos()), QPointF(event.buttonDownScreenPos(Qt.LeftButton))).length() < QApplication.startDragDistance():
return
drag = QDrag(event.widget())
mime = QMimeData()
drag.setMimeData(mime)
ColorItem.n += 1
if ColorItem.n > 2 and qrand() % 3 == 0:
root = QFileInfo(__file__).absolutePath()
image = QImage(root + '/images/head.png')
mime.setImageData(image)
drag.setPixmap(QPixmap.fromImage(image).scaled(30,40))
drag.setHotSpot(QPoint(15, 30))
else:
mime.setColorData(self.color)
mime.setText("#%02x%02x%02x" % (self.color.red(), self.color.green(), self.color.blue()))
pixmap = QPixmap(34, 34)
pixmap.fill(Qt.white)
painter = QPainter(pixmap)
painter.translate(15, 15)
painter.setRenderHint(QPainter.Antialiasing)
self.paint(painter, None, None)
painter.end()
pixmap.setMask(pixmap.createHeuristicMask())
drag.setPixmap(pixmap)
drag.setHotSpot(QPoint(15, 20))
drag.exec_()
self.setCursor(Qt.OpenHandCursor)
def mouseReleaseEvent(self, event):
self.setCursor(Qt.OpenHandCursor)
class RobotPart(QGraphicsObject):
def __init__(self, parent=None):
super(RobotPart, self).__init__(parent)
self.color = QColor(Qt.lightGray)
self.dragOver = False
self.setAcceptDrops(True)
def dragEnterEvent(self, event):
if event.mimeData().hasColor():
event.setAccepted(True)
self.dragOver = True
self.update()
else:
event.setAccepted(False)
def dragLeaveEvent(self, event):
self.dragOver = False
self.update()
def dropEvent(self, event):
self.dragOver = False
if event.mimeData().hasColor():
self.color = QColor(event.mimeData().colorData())
self.update()
class RobotHead(RobotPart):
def __init__(self, parent=None):
super(RobotHead, self).__init__(parent)
self.pixmap = QPixmap()
def boundingRect(self):
return QRectF(-15, -50, 30, 50)
def paint(self, painter, option, widget=None):
if self.pixmap.isNull():
painter.setBrush(self.color.lighter(130) if self.dragOver else self.color)
painter.drawRoundedRect(-10, -30, 20, 30, 25, 25, Qt.RelativeSize)
painter.setBrush(Qt.white)
painter.drawEllipse(-7, -3 - 20, 7, 7)
painter.drawEllipse(0, -3 - 20, 7, 7)
painter.setBrush(Qt.black)
painter.drawEllipse(-5, -1 - 20, 2, 2)
painter.drawEllipse(2, -1 - 20, 2, 2)
painter.setPen(QPen(Qt.black, 2))
painter.setBrush(Qt.NoBrush)
painter.drawArc(-6, -2 - 20, 12, 15, 190 * 16, 160 * 16)
else:
painter.scale(.2272, .2824)
painter.drawPixmap(QPointF(-15*4.4, -50*3.54), self.pixmap)
def dragEnterEvent(self, event):
if event.mimeData().hasImage():
event.setAccepted(True)
self.dragOver = True
self.update()
else:
super(RobotHead, self).dragEnterEvent(event)
def dropEvent(self, event):
if event.mimeData().hasImage():
self.dragOver = False
self.pixmap = QPixmap(event.mimeData().imageData())
self.update()
else:
super(RobotHead, self).dropEvent(event)
class RobotTorso(RobotPart):
def boundingRect(self):
return QRectF(-30, -20, 60, 60)
def paint(self, painter, option, widget=None):
painter.setBrush(self.color.lighter(130) if self.dragOver else self.color)
painter.drawRoundedRect(-20, -20, 40, 60, 25, 25, Qt.RelativeSize)
painter.drawEllipse(-25, -20, 20, 20)
painter.drawEllipse(5, -20, 20, 20)
painter.drawEllipse(-20, 22, 20, 20)
painter.drawEllipse(0, 22, 20, 20)
class RobotLimb(RobotPart):
def boundingRect(self):
return QRectF(-5, -5, 40, 10)
def paint(self, painter, option, widget=None):
painter.setBrush(self.color.lighter(130) if self.dragOver else self.color)
painter.drawRoundedRect(self.boundingRect(), 50, 50, Qt.RelativeSize)
painter.drawEllipse(-5, -5, 10, 10)
class Robot(RobotPart):
def __init__(self):
super(Robot, self).__init__()
self.setFlag(self.ItemHasNoContents)
self.torsoItem = RobotTorso(self)
self.headItem = RobotHead(self.torsoItem)
self.upperLeftArmItem = RobotLimb(self.torsoItem)
self.lowerLeftArmItem = RobotLimb(self.upperLeftArmItem)
self.upperRightArmItem = RobotLimb(self.torsoItem)
self.lowerRightArmItem = RobotLimb(self.upperRightArmItem)
self.upperRightLegItem = RobotLimb(self.torsoItem)
self.lowerRightLegItem = RobotLimb(self.upperRightLegItem)
self.upperLeftLegItem = RobotLimb(self.torsoItem)
self.lowerLeftLegItem = RobotLimb(self.upperLeftLegItem)
settings = (
# Item Position Rotation Scale
# x y start end
(self.headItem, 0, -18, 20, -20, 1.1),
(self.upperLeftArmItem, -15, -10, 190, 180, 0),
(self.lowerLeftArmItem, 30, 0, 50, 10, 0),
(self.upperRightArmItem, 15, -10, 300, 310, 0),
(self.lowerRightArmItem, 30, 0, 0, -70, 0),
(self.upperRightLegItem, 10, 32, 40, 120, 0),
(self.lowerRightLegItem, 30, 0, 10, 50, 0),
(self.upperLeftLegItem, -10, 32, 150, 80, 0),
(self.lowerLeftLegItem, 30, 0, 70, 10, 0),
(self.torsoItem, 0, 0, 5, -20, 0),
)
animation = QParallelAnimationGroup(self)
for item, pos_x, pos_y, start_rot, end_rot, scale in settings:
item.setPos(pos_x, pos_y)
rot_animation = QPropertyAnimation(item, b'rotation')
rot_animation.setStartValue(start_rot)
rot_animation.setEndValue(end_rot)
rot_animation.setEasingCurve(QEasingCurve.SineCurve)
rot_animation.setDuration(2000)
animation.addAnimation(rot_animation)
if scale > 0:
scale_animation = QPropertyAnimation(item, b'scale')
scale_animation.setEndValue(scale)
scale_animation.setEasingCurve(QEasingCurve.SineCurve)
scale_animation.setDuration(2000)
animation.addAnimation(scale_animation)
animation.setLoopCount(-1)
animation.start()
def boundingRect(self):
return QRectF()
def paint(self, painter, option, widget=None):
pass
class GraphicsView(QGraphicsView):
def resizeEvent(self, e):
pass
if __name__== '__main__':
import sys
import math
app = QApplication(sys.argv)
qsrand(QTime(0, 0, 0).secsTo(QTime.currentTime()))
scene = QGraphicsScene(-200, -200, 400, 400)
for i in range(10):
item = ColorItem()
angle = i*6.28 / 10.0
item.setPos(math.sin(angle)*150, math.cos(angle)*150)
scene.addItem(item)
robot = Robot()
robot.setTransform(QTransform.fromScale(1.2, 1.2), True)
robot.setPos(0, -20)
scene.addItem(robot)
view = GraphicsView(scene)
view.setRenderHint(QPainter.Antialiasing)
view.setViewportUpdateMode(QGraphicsView.BoundingRectViewportUpdate)
view.setBackgroundBrush(QColor(230, 200, 167))
view.setWindowTitle("Drag and Drop Robot")
view.show()
sys.exit(app.exec_())
