Hi Renaud,
Yes, I use Spec with the Morphic graphical library and with the calculation that you described, I got the correct answer for the coordinates within the Morph representing the image (Form). Because I was using an autoscaling image, I had then to do one more step by scaling the local coordinates according to the scale of the image, but that was very easy. Thanks! Kind regards, Mikael Från: Renaud de Villemeur via Pharo-users [mailto:pharo-users@lists.pharo.org] Skickat: den 5 mars 2025 02:13 Till: Any question about pharo is welcome Kopia: Any question about pharo is welcome; Renaud de Villemeur Ämne: [Pharo-users] Re: Converting global coordinates from a mouse event Hi Mikael I assume you use spec with the Morphic underlying graphical library. In your presenter: - `anEvent position` will give you the event position in the global world coordinate. - `self adapter widget position.` will give you the top left corner underlying Morph position in the global world coordinate. `anEvent position - self adapter widget position` should give you the position you're looking for. Renaud Mar 3, 2025, 03:17 by mikael.sv...@fridhem.org: I have a presenter that is a subclass of SpPresenterWithModel and it contains, among other things, an ImagePresenter with an autoscaling image (a Form). I want to capture mouse clicks on the image and get the coordinate of the click relative to the upper left corner of the Form. My #initializePresenter method looks like this: initializePresenter image := self newImage image: self emptyImage; autoScale: true. image eventHandler whenMouseDownDo: [ :event | self handleMouseDown: event]. This works, and the #handleMouseDown: method is run whenever the mouse is pressed on the ImagePresenter, but the MouseButtonEvent reports global coordinates and I can’t find out how to convert these to coordinates relative to the Form that the ImagePresenter holds. I have googled and found answers to similar old questions, but nothing that seems to apply to Spec2. There must be a very simple solution to this, it’s just that I can’t seem to find it. Kind regards, Mikael
