PyQt4 - Drag & drop other objects - pyqt4

Question

First of all I know this question in general have been asked and solved. I have read the complete post here: PyQt4 - Drag and Drop but my question is a little bit more specific.
What I am creating is the game Draught, but rather simplified. What I currently need help with is moving the pieces. I've managed to create a button which can be moved by holding down the left mouse button. The hard part is implementing this functionality for the button to a piece. The game is using two separate files, one called GUI-game-template and the other Game_Model.
My code so far:
import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *
import Game_Model
from PyQt4 import QtCore, QtGui
app = QApplication(sys.argv)
class MyGame(QMainWindow):
def __init__(self, parent=None):
super(MyGame, self).__init__()
self.setWindowTitle("Game template")
self.initUI()
self.timer = QBasicTimer()
def initUI(self):
"""Initializing all components"""
self.setAcceptDrops(True)
self.frame = QWidget(self)
self.setCentralWidget(self.frame)
#Hole window
self.layout = QVBoxLayout()
#Widgets
self.gui_board = Game_Model.Game_Model(self)
self.gui_board.setLineWidth(3)
self.gui_board.setFrameStyle(QFrame.Plain)
self.gui_board.setMinimumSize(400,400)
self.layout.addWidget(self.gui_board)
self.gui_board.setFocus()
#Buttons
self.button_box = QHBoxLayout()
self.button_box.addStretch(1)
self.btn_start = QPushButton('Start', self)
self.btn_start.clicked.connect(self.btn_start_action)
self.button_box.addWidget( self.btn_start )
self.btn_restart = QPushButton('Restart', self)
self.btn_restart.clicked.connect(self.btn_restart_action)
self.layout.addLayout(self.button_box)
self.button_box.addWidget( self.btn_restart )
self.button_box.addStretch(1)
self.button = Button('Button', self)
self.button.move(100, 65)
#Add layouts to widget
self.layout.addLayout(self.button_box)
self.frame.setLayout(self.layout)
#Statusbar
self.statusBar().showMessage('Ready')
def keyPressEvent(self, event):
key = Qt.MouseButton()
if(key == Qt.Key_Up):
self.gui_board.hero_y -= 1
if(key == Qt.Key_Down):
self.gui_board.hero_y += 1
if(key == Qt.Key_Left):
self.gui_board.hero_x -= 1
if(key == Qt.Key_Right):
self.gui_board.hero_x += 1
self.update()
def timerEvent(self,event):
if (event.timerId() == self.timer.timerId()):
self.gui_board.enemy_x += 1
self.gui_board.enemy_y += 1
self.update()
def dragEnterEvent(self, e):
e.accept()
def dropEvent(self, e):
position = e.pos()
self.button.move(position)
e.setDropAction(QtCore.Qt.MoveAction)
e.accept()
#pyqtSlot()
def btn_start_action(self):
self.timer.start(500,self)
#pyqtSlot()
def btn_restart_action(self):
pass
def run(self):
self.show()
sys.exit(app.exec_())
class Button(QtGui.QPushButton):
def __init__(self, title, parent):
super(Button,self).__init__(title, parent)
def mouseMoveEvent(self, e):
if e.buttons() != Qt.LeftButton:
return
mimeData = QMimeData()
drag = QtGui.QDrag(self)
drag.setMimeData(mimeData)
drag.setHotSpot(e.pos() - self.rect().topLeft())
dropAction = drag.start(QtCore.Qt.MoveAction)
#Creates an instance and runs it
MyGame().run()
Next file:
from PyQt4.QtCore import *
from PyQt4.QtGui import *
class Game_Model(QFrame):
Boardwidth = 8
Boardheight = 8
def __init__(self,parent):
super(Game_Model, self).__init__()
self.setFocusPolicy(Qt.StrongFocus)
self.hero_x = 2
self.hero_y = 2
self.enemy_x = 1
self.enemy_y = 6
self.enemy_x2 = 2
self.enemy_y2 = 5
self.enemy_x3 = 2
self.enemy_y3 = 7
self.enemy_x4 = 0
self.enemy_y4 = 7
self.enemy_x5 = 0
self.enemy_y5 = 5
self.enemy_x6 = 3
self.enemy_y6 = 6
self.enemy_x7 = 4
self.enemy_y7 = 5
self.enemy_x8 = 4
self.enemy_y8 = 7
self.enemy_x9 = 5
self.enemy_y9 = 6
self.enemy_x10 = 6
self.enemy_y10 = 5
self.enemy_x11 = 6
self.enemy_y11 = 7
self.enemy_x12 = 7
self.enemy_y12 = 6
def paintEvent(self, event):
qp = QPainter()
width = self.size().width() - 1
height = self.size().height() - 1
sq_w = width/Game_Model.Boardwidth
sq_h = height/Game_Model.Boardheight
qp.begin(self)
self.draw_grid(qp, width, height, sq_w, sq_h)
self.draw_hero(qp, sq_w, sq_h)
self.draw_enemy(qp, sq_w, sq_h)
self.draw_enemy2(qp, sq_w, sq_h)
self.draw_enemy3(qp, sq_w, sq_h)
self.draw_enemy4(qp, sq_w, sq_h)
self.draw_enemy5(qp, sq_w, sq_h)
self.draw_enemy6(qp, sq_w, sq_h)
self.draw_enemy7(qp, sq_w, sq_h)
self.draw_enemy8(qp, sq_w, sq_h)
self.draw_enemy9(qp, sq_w, sq_h)
self.draw_enemy10(qp, sq_w, sq_h)
self.draw_enemy11(qp, sq_w, sq_h)
self.draw_enemy12(qp, sq_w, sq_h)
qp.end()
def draw_grid(self, qp, width, height, sq_w, sq_h):
for n in range(0,Game_Model.Boardheight + 1):
qp.drawLine(0,sq_h * n, width, sq_h * n)
for n in range(0,Game_Model.Boardwidth + 1):
qp.drawLine(sq_w * n, 0, sq_w * n, height)
def draw_hero(self, qp, sq_w, sq_h):
color = QColor(0x20FA48)
qp.fillRect( sq_w * self.hero_x + 7, sq_h * self.hero_y + 7,
sq_w * 0.7, sq_h * 0.7, color)
qp.drawRect( sq_w * self.hero_x + 7, sq_h * self.hero_y + 7,
sq_w * 0.7, sq_h * 0.7)
def draw_enemy(self,qp, sq_w, sq_h):
qp.setBrush(QBrush(QColor('red'),Qt.SolidPattern))
qp.drawEllipse( sq_w * self.enemy_x + 7, sq_h * self.enemy_y + 7,
sq_w * 0.7, sq_h * 0.7)
def draw_enemy2(self,qp, sq_w, sq_h):
qp.setBrush(QBrush(QColor('red'),Qt.SolidPattern))
qp.drawEllipse( sq_w * self.enemy_x2 + 7, sq_h * self.enemy_y2 + 7,
sq_w * 0.7, sq_h * 0.7)
def draw_enemy3(self,qp, sq_w, sq_h):
qp.setBrush(QBrush(QColor('red'),Qt.SolidPattern))
qp.drawEllipse( sq_w * self.enemy_x3 + 7, sq_h * self.enemy_y3 + 7,
sq_w * 0.7, sq_h * 0.7)
def draw_enemy4(self,qp, sq_w, sq_h):
qp.setBrush(QBrush(QColor('red'),Qt.SolidPattern))
qp.drawEllipse( sq_w * self.enemy_x4 + 7, sq_h * self.enemy_y4 + 7,
sq_w * 0.7, sq_h * 0.7)
def draw_enemy5(self,qp, sq_w, sq_h):
qp.setBrush(QBrush(QColor('red'),Qt.SolidPattern))
qp.drawEllipse( sq_w * self.enemy_x5 + 7, sq_h * self.enemy_y5 + 7,
sq_w * 0.7, sq_h * 0.7)
def draw_enemy6(self,qp, sq_w, sq_h):
qp.setBrush(QBrush(QColor('red'),Qt.SolidPattern))
qp.drawEllipse( sq_w * self.enemy_x6 + 7, sq_h * self.enemy_y6 + 7,
sq_w * 0.7, sq_h * 0.7)
def draw_enemy7(self,qp, sq_w, sq_h):
qp.setBrush(QBrush(QColor('red'),Qt.SolidPattern))
qp.drawEllipse( sq_w * self.enemy_x7 + 7, sq_h * self.enemy_y7 + 7,
sq_w * 0.7, sq_h * 0.7)
def draw_enemy8(self,qp, sq_w, sq_h):
qp.setBrush(QBrush(QColor('red'),Qt.SolidPattern))
qp.drawEllipse( sq_w * self.enemy_x8 + 7, sq_h * self.enemy_y8 + 7,
sq_w * 0.7, sq_h * 0.7)
def draw_enemy9(self,qp, sq_w, sq_h):
qp.setBrush(QBrush(QColor('red'),Qt.SolidPattern))
qp.drawEllipse( sq_w * self.enemy_x9 + 7, sq_h * self.enemy_y9 + 7,
sq_w * 0.7, sq_h * 0.7)
def draw_enemy10(self,qp, sq_w, sq_h):
qp.setBrush(QBrush(QColor('red'),Qt.SolidPattern))
qp.drawEllipse( sq_w * self.enemy_x10 + 7, sq_h * self.enemy_y10 + 7,
sq_w * 0.7, sq_h * 0.7)
def draw_enemy11(self,qp, sq_w, sq_h):
qp.setBrush(QBrush(QColor('red'),Qt.SolidPattern))
qp.drawEllipse( sq_w * self.enemy_x11 + 7, sq_h * self.enemy_y11 + 7,
sq_w * 0.7, sq_h * 0.7)
def draw_enemy12(self,qp, sq_w, sq_h):
qp.setBrush(QBrush(QColor('red'),Qt.SolidPattern))
qp.drawEllipse( sq_w * self.enemy_x12 + 7, sq_h * self.enemy_y12 + 7,
sq_w * 0.7, sq_h * 0.7)