Tkinter : Moving more than one object at once

Each time you create a circle/text pair, create a unique tag and associate the tag with both the circle and the text. You can then use this unique tag to move both objects at once.

For example, modify your DragCircle constructor to look like this:

class DragCircle:
    #Constructor
    def __init__(self, window, width=100, height=100, colour="red", text = "test"):
        self.window = window
        tag = "circle-%d" % id(self)
        self.circle = self.window._create_circle(width, height, colour, tag)
        self.circle_text = self.window._create_text(width, height, text, tag)

Next, modify the _create_circle and _create_text functions to accept the tag:

def _create_circle(self, xcoord, ycoord, color, tag):
    id_=self.canvas.create_oval(xcoord-25, ycoord-25, xcoord+25, ycoord+25, outline=color, fill=color, tags = ("circledrag", tag))

#This is used to draw text on top of the object on the canvas
def _create_text(self, xcoord, ycoord, text, tag):
    self.canvas.create_text(xcoord, ycoord, text = text, tags = ("circledrag", "text", tag))

Finally, modify your OnCircleButtonPress to get the tag and use it for moving the objects around:

def OnCircleButtonPress(self, event):
    ...
    item = self.canvas.find_closest(event.x, event.y)[0]
    tags = self.canvas.gettags(item)
    for tag in tags:
        if tag.startswith("circle-"):
            break
    self._drag_data["item"] = tag
    ...

My proposal which may not be the best

In the constructor you define an association table.

self.assoc = {}

add the method:

def _create_circlewt(self, xcoord, ycoord, color, text):
      tc = self.canvas.create_oval(xcoord-25, ycoord-25, xcoord+25, ycoord+25, outline=color, fill=color, tags = "circledrag")
      tx = self.canvas.create_text(xcoord, ycoord, text = text)
      self.assoc[tc] = tx

in the OnCircleMotion: add the line

self.canvas.move(self.assoc[self._drag_data["item"]], delta_x, delta_y)

just after the other move line

in DragCircle class constructor comment your definition and add the call to _create_circlewt

self.circle_w_text = self.window._create_circlewt(width, height, colour,text)

it works .. I let you enhance the canvas move to enable multiple objects association like

self.assoc[CircleIndex].append(otherobjectIndex)

Tkinter : Moving more than one object at once

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