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+35 votes

There four options for showing the path of where the user click on the screen (point).
1) Switch ImageView to Canvas
- getGraphicsCountext() from canvas
- draw Image on the canvas
- draw dots on canvas

2) Put transparent canvas on top of ImageView using stackPane
- Just draw the dots on canvas using the GraphicsContext
- Will need the mouse events on Canvas
- Need Canvas to always be EXACTLY same size as ImageView
(if you have issues with this see http://lovelace.augustana.edu/q2a/index.php/246/there-properties-the-video-resize-the-imageview-the-canvas)

3) draw on Buffered Image before concerting to JavaFX image + Setting the ImageView

4) Add Circle object to a Pane that contains ImageView

In my team we used method 2 and it was not that bad.

asked in CSC285_Fall2018 by (8 points)

2 Answers

+15 votes
 
Best answer

just for clarification, on option #4 you say adding a circle object to the anchor/border pane in this case? Or do you also have to add a stack pane like with option 2?
I might be getting it wrong but so far option 4 and 2 look pretty similar to me.

answered by (8 points)
selected by
+6

Option 2 involves using one Canvas node to draw graphics on a transparent layer. Option 4 involves using multiple Circle nodes which get included in the JavaFX scene.

+14 votes

I went with option two as well. It seems to be the most straightforward process, and does not interfere with the rest of the code too much. I would reiterate that if you use this method you have to collect the point information from the canvas and not the image view

answered by (8 points)
+4

It would also be possible to get the points form mouse event by doing the .getX and .getY.

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