NodeCanvas
This is the parent widget where all nodes will be drawn. The wires/lines are placed under this class.
- We can add our own grid images in the canvas. (Make sure the image size is big enough) Default grids are: ["lines", "dots", None]
- It has drag and zoom ability, every canvas object is moved except the grid image.
- It can save or load node trees.
root = tkinter.Tk()
canvas = NodeCanvas(root)
canvas.pack()
...| Parameter | Description |
|---|---|
| master | parent widget to which the canvas will be attached |
| bg | specify the bg color of canvas |
| width | width of the canvas |
| height | height of the canvas |
| grid_image | paste the grid image to the canvas, default grid name: "lines" |
| zoom | enable/disable the zoom feature (boolean) |
| move | enable/disable the drag feature (boolean) |
| wire_color | change the line colors of attached nodes |
| wire_hover_color | change the activefill color of the lines |
| wire_width | change the width of the lines |
| wire_dash | enable/disable dotted lines (boolean) |
- .configure(args...): change some attributes for the canvas like wire_colors, bg, grid_image etc.
-
.save(filename): save the node tree to a file.
Eg: canvas.save("canvas.json") -
.load(filename): load the node tree back to the canvas.
Eg: canvas.load("canvas.json") - .clear(): deletes all the nodes from the canvas