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from PyQt5.QtCore import Qt, QPointF, QRectF
from PyQt5.QtGui import QBrush, QPalette
from PyQt5.QtWidgets import (QFileDialog, QApplication, QHBoxLayout, QMenu,
QTabWidget, QWidget, QSpacerItem, QStyle, QGraphicsProxyWidget)
from . import dialogs
from .graphics import customView, customScene
from .data import paperSizes, ppiList, sheetDimensionList
from .app import shapeGrips, lines
from .streamTable import streamTable, moveRect
import shapes
class canvas(customView):
"""
Defines the work area for a single sheet. Contains a QGraphicScene along with necessary properties
for context menu and dialogs.
"""
def __init__(self, parent=None, size= 'A0', ppi= '72' , parentMdiArea = None, parentFileWindow = None, landscape=True):
super(canvas, self).__init__(parent=parent)
#Store values for the canvas dimensions for ease of access, these are here just to be
# manipulated by the setters and getters
self._ppi = ppi
self._canvasSize = size
self._landscape = landscape
self.streamTable = None
#Create area for the graphic items to be placed, this is just here right now for the future
# when we will draw items on this, this might be changed if QGraphicScene is subclassed.
#set layout and background color
self.painter = customScene()
self.painter.labelAdded.connect(self.updateStreamTable)
self.painter.setBackgroundBrush(QBrush(Qt.white)) #set white background
self.setScene(self.painter)
#set initial paper size for the scene
self.painter.setSceneRect(0, 0, *paperSizes[self._canvasSize][self._ppi])
self.parentMdiArea = parentMdiArea
self.parentFileWindow = parentFileWindow
self.customContextMenuRequested.connect(self.sideViewContextMenu)
def addStreamTable(self, pos=QPointF(0, 0), table=None):
self.streamTable = table if table else streamTable(self.labelItems, canvas=self)
self.streamTableRect = moveRect()
self.streamTableRect.setFlags(moveRect.ItemIsMovable |
moveRect.ItemIsSelectable)
self.streamTableProxy = QGraphicsProxyWidget(self.streamTableRect)
self.streamTableProxy.setWidget(self.streamTable)
self.painter.addItem(self.streamTableRect)
self.streamTableRect.setPos(pos)
def updateStreamTable(self, item):
if self.streamTable:
self.streamTable.model.insertColumn(item = item)
def sideViewContextMenu(self, pos):
self.parentFileWindow.sideViewContextMenu(self.mapTo(self.parentFileWindow, pos))
def resizeView(self, w, h):
#helper function to resize canvas
self.painter.setSceneRect(0, 0, w, h)
def adjustView(self):
#utitily to adjust current diagram view
width, height = self.dimensions
frameWidth = self.frameWidth()
#update view size
self.setSceneRect(0, 0, width - frameWidth*2, height)
def resizeEvent(self, event):
#overloaded function to also view size on window update
# self.adjustView()
pass
def setCanvasSize(self, size):
"""
extended setter for dialog box
"""
self.canvasSize = size
def setCanvasPPI(self, ppi):
"""
extended setter for dialog box
"""
self.ppi = ppi
@property
def dimensions(self):
#returns the dimension of the current scene
return self.painter.sceneRect().width(), self.painter.sceneRect().height()
@property
def items(self):
# generator to filter out certain items
for i in self.painter.items():
yield i
@property
def labelItems(self):
for i in self.items:
if isinstance(i, shapes.LineLabel):
yield i
@property
def canvasSize(self):
return self._canvasSize
@property
def ppi(self):
return self._ppi
@property
def landscape(self):
return self._landscape
@canvasSize.setter
def canvasSize(self, size):
self._canvasSize = size
if self.painter:
self.resizeView(*(sorted(paperSizes[self.canvasSize][self.ppi], reverse = self.landscape)))
@ppi.setter
def ppi(self, ppi):
self._ppi = ppi
if self.painter:
self.resizeView(*(sorted(paperSizes[self.canvasSize][self.ppi], reverse = self.landscape)))
@landscape.setter
def landscape(self, bool):
self._landscape = bool
if self.painter:
self.resizeView(*(sorted(paperSizes[self.canvasSize][self.ppi], reverse = self.landscape)))
#following 2 methods are defined for correct pickling of the scene. may be changed to json or xml later so as
# to not have a binary file.
def __getstate__(self) -> dict:
return {
"_classname_": self.__class__.__name__,
"ppi": self._ppi,
"canvasSize": self._canvasSize,
"ObjectName": self.objectName(),
"symbols": [i for i in self.painter.items() if isinstance(i, shapes.NodeItem)],
"lines": sorted([i for i in self.painter.items() if isinstance(i, shapes.Line)], key = lambda x: 1 if x.refLine else 0),
"landscape": self.landscape
}
def __setstate__(self, dict):
self._ppi = dict['ppi']
self._canvasSize = dict['canvasSize']
self.landscape = dict['landscape']
self.setObjectName(dict['ObjectName'])
for item in dict['symbols']:
graphic = getattr(shapes, item['_classname_'])()
graphic.__setstate__(dict = item)
self.painter.addItem(graphic)
graphic.setPos(*item['pos'])
graphic.updateLineGripItem()
graphic.updateSizeGripItem()
for gripitem in item['lineGripItems']:
shapeGrips[gripitem[0]] = (graphic, gripitem[1])
if item['label']:
graphicLabel = shapes.ItemLabel(pos = QPointF(*item['label']['pos']), parent = graphic)
graphicLabel.__setstate__(item['label'])
self.painter.addItem(graphicLabel)
for item in dict['lines']:
line = shapes.Line(QPointF(*item['startPoint']), QPointF(*item['endPoint']))
lines[item['id']] = line
line.__setstate__(dict = item)
self.painter.addItem(line)
graphic, index = shapeGrips[item['startGripItem']]
line.startGripItem = graphic.lineGripItems[index]
graphic.lineGripItems[index].line = line
if item['endGripItem']:
graphic, index = shapeGrips[item['endGripItem']]
line.endGripItem = graphic.lineGripItems[index]
graphic.lineGripItems[index].line = line
else:
line.refLine = lines[item['refLine']]
lines[item['refLine']].midLines.append(line)
line.refIndex = item['refIndex']
for label in item['label']:
labelItem = shapes.LineLabel(QPointF(*label['pos']), line)
line.label.append(labelItem)
labelItem.__setstate__(label)
self.painter.addItem(labelItem)
line.updateLine()
line.addGrabber()
shapeGrips.clear()
lines.clear()
self.painter.advance()
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