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| #!/usr/bin/python
# -*- coding: utf8 -*-
import sys
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
class MainWindow(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.scene = MyGraphicsScene()
self.scene.setSceneRect(0, 0, 1000.0, 1000.0)
self.view = QGraphicsView()
self.view.setScene (self.scene)
self.view.setRenderHints(QPainter.Antialiasing)
self.setCentralWidget(self.view)
self.view.setDragMode(QGraphicsView.NoDrag)
#self.view.setDragMode(QGraphicsView.RubberBandDrag)
class MyGraphicsScene(QGraphicsScene):
def __init__(self):
QGraphicsScene.__init__(self)
self.createMode = 0
self.createState = False
self.defaultItem = 0
self.pen = QPen(Qt.black, 2)
self.penTemp = QPen(Qt.red, 2)
self.penOver = QPen(Qt.blue, 2)
#def pix(self):
# pixmap = QPixmap("555.jpg")
# itempix=self.addItem(pixmap)
# self.addPixmap(pixmap)
def mousePressEvent(self, e):
#a=self.pix()
if e.button() == Qt.LeftButton and self.createMode == 1:
self.firstPoint = e.scenePos()
self.currentItem = self.createItem()
if self.defaultItem==3:
pixmap = QPixmap("555.jpg")
pixItem = QGraphicsPixmapItem(pixmap)
self.addItem(pixItem)
self.createState = True
else:
self.currentItem.setPen(self.penTemp)
self.addItem(self.currentItem)
self.createState = True
else:
QGraphicsScene.mousePressEvent(self, e)
def createItem(self):
if self.defaultItem == 0: return MyLineItem(self)
if self.defaultItem == 1: return MyRectItem(self)
if self.defaultItem == 2: return MyEllipseItem(self)
if self.defaultItem == 3: return MyGraph(self)
def mouseReleaseEvent(self, e):
if e.button() == Qt.LeftButton and self.createState:
if e.scenePos() == self.firstPoint:
self.removeItem(self.currentItem)
del self.currentItem
else:
self.currentItem.setPen(self.pen)
self.createState = False
else:
QGraphicsScene.mouseReleaseEvent(self, e)
def mouseMoveEvent(self, e):
if self.createState:
self.currentItem.resize(self.firstPoint, e.scenePos())
else:
QGraphicsScene.mouseMoveEvent(self, e)
def keyPressEvent(self, e):
key = e.key()
if( key == Qt.Key_Delete):
self.removeSelection()
elif(key == Qt.Key_Space and not e.isAutoRepeat()):
self.swapToCreateMode()
elif(key == Qt.Key_Return):
self.changeDefaultItem()
def keyReleaseEvent(self, e):
key = e.key()
if(key == Qt.Key_Space and not e.isAutoRepeat()):
self.swapToEditMode()
def removeSelection(self):
items = self.selectedItems()
map(self.removeItem, items)
for i in items:
del i
def swapToCreateMode(self):
print ("Mode creation")
self.createMode = 1
def swapToEditMode(self):
print ("Mode edition")
self.createMode = 0
def changeDefaultItem(self):
self.defaultItem = (self.defaultItem + 1) % 4
if self.defaultItem == 0: print ("lignes")
elif self.defaultItem == 1: print ("rectangles")
elif self.defaultItem == 2: print ("Ellipses")
elif self.defaultItem == 3: print ("Pix")
class VirtualItem(object):
def __init__(self):
self.setAcceptHoverEvents(True)
self.setFlag(QGraphicsItem.ItemIsMovable, True)
self.setFlag(QGraphicsItem.ItemIsSelectable, True)
#self.Q = QObject()
def hoverEnterEvent(self, e):
print ("Enter", self)
self.setPen(self.parent.penOver)
def hoverLeaveEvent(self, e):
print ("Leave", self)
self.setPen(self.parent.pen)
def mousePressEvent(self, e):
print ("Item", self, "pressed at ", self.pos())
if MyGraphicsScene.defaultItem==3:
print("test")
#QGraphicsPixmapItem.QPixmap("555.jpg")
else:
QGraphicsItem.mousePressEvent(self, e)
def mouseReleaseEvent(self, e):
print ("Item", self, "released at", self.pos())
QGraphicsItem.mouseReleaseEvent(self, e)
class MyGraph(QGraphicsPixmapItem, VirtualItem):
def _init__(self, parent = None):
QGraphicsPixmapItem.__init__(self)
self.parent=parent
VirtualItem.__init__(self)
def image_item(self,position)
print("test")
class MyLineItem(QGraphicsLineItem, VirtualItem):
def __init__(self, parent = None):
QGraphicsLineItem.__init__(self)
self.parent = parent
VirtualItem.__init__(self)
def resize(self, p1, p2):
self.setLine(QLineF(p1, p2))
class MyRectItem(QGraphicsRectItem, VirtualItem):
def __init__(self, parent = None):
QGraphicsRectItem.__init__(self)
self.parent = parent
VirtualItem.__init__(self)
def resize(self, p1, p2):
self.setRect(QRectF(p1, p2))
class MyEllipseItem(QGraphicsEllipseItem, VirtualItem):
def __init__(self, parent = None):
QGraphicsEllipseItem.__init__(self)
self.parent = parent
VirtualItem.__init__(self)
def resize(self, p1, p2):
self.setRect(QRectF(p1, p2))
if __name__ == "__main__":
app = QApplication(sys.argv)
window = MainWindow()
window.show()
sys.exit(app.exec_()) |
