Qt Forum
    • Login
    • Search
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Groups
    • Search
    • Unsolved

    Update: Forum Guidelines & Code of Conduct

    SVG tooltips in QGraphicsView

    General and Desktop
    3
    8
    2027
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • A
      Ajp1989 last edited by

      I have looked through the QtSvg docs and can't find any pointers on what I want to achieve. I have an SVG that I currently display within a QGraphicsView and that works fine. What I want however is to mimic firefox's behaviour (I believe it also part of the SVG standard) that when moused over the elements title is displayed as a tooltip.

      It is trivial to ascertain which QGraphicsSvgItem is under the mouse but I cant find any details about how you would find out more information such as the element within the SVG file. I have attached a sample SVG file and firefox gives the behaviour I want.

      Thanks for reading.
      !http://www.dur.ac.uk/a.j.poole/all.svg(Example SVG)!

      1 Reply Last reply Reply Quote 0
      • A
        Asperamanca last edited by

        No SVG experience to speak of, but from the docs your most likely chance seems to be QSvgRenderer::boundsOnElement - provided you know the item IDs.

        1 Reply Last reply Reply Quote 0
        • A
          Ajp1989 last edited by

          Thanks for the tip. Think I am going to have to manually parse the file to get element IDs and titles. But a manual test appears to work.

          1 Reply Last reply Reply Quote 0
          • A
            Asperamanca last edited by

            SVG support is not Qt's strong suit, I'm sorry to say. Hope you find a solution that works for you.

            1 Reply Last reply Reply Quote 0
            • R
              rhaschke last edited by

              Could you please post your solution? I have the same problem to solve.
              How can you know whether the mouse is over a particular svg node? Using bounding boxes is definitely not sufficient.

              1 Reply Last reply Reply Quote 0
              • R
                rhaschke last edited by

                Could you please post your solution? I have the same problem to solve.
                How can you know whether the mouse is over a particular svg node? Using bounding boxes is definitely not sufficient.

                1 Reply Last reply Reply Quote 0
                • A
                  Ajp1989 last edited by

                  I agree that bounding boxes are not ideal as elements may have unsual geometries but in my case it is just about acceptable so I didn't go further in finding a better solution. I would love to hear about one if you find it however.

                  What I do is this:

                  1. Parse svg to find element ID and title.
                  2. calculate each elements bounds with QSvgRenderer::boundsOnElement
                  3. on mouse events check if element bounds contains the mouse position
                  1 Reply Last reply Reply Quote 0
                  • A
                    Ajp1989 last edited by

                    I agree that bounding boxes are not ideal as elements may have unsual geometries but in my case it is just about acceptable so I didn't go further in finding a better solution. I would love to hear about one if you find it however.

                    What I do is this:

                    1. Parse svg to find element ID and title.
                    2. calculate each elements bounds with QSvgRenderer::boundsOnElement
                    3. on mouse events check if element bounds contains the mouse position
                    1 Reply Last reply Reply Quote 0
                    • First post
                      Last post