Skip to main content

User draw shapes on top of an image



I would want to allow user to draw semi-transparent basic shapes (rectangle, circle) with user defined text over an image. The basic idea is to have a map underneath and users could mark certain areas of from it. It has been a while since doing web development and I'm quite uncertain which approach would be the best. It should work even on older browsers.





Any help would be appreciated!


Comments

  1. First, forget about old browsers, it's 2012 after all. You won't be able to draw circle without having such css properties as "border-radius".

    Second, no matter what, you'll have to use javascript in order to do the "drawing". jQuery + jQuery UI would be great for that. It appears like you'd need at least following plugins:


    Draggable - to drag your shapes around
    Resizable - to resize shapes
    Dialog - to put text into the shape (there must be a textarea within the dialog. After you fill textarea and click Ok text will be put into the shape).


    There's another way to put text into shapes, but that'll require some serious development efforts.

    Now, how to create shapes. There are couple of ways:


    Button which you'll have to click and which will create a box with set parameters
    Use boxer plugin


    That's the gist of it.

    Rendering of the saved shapes is quite a different thing and i believe it shouldn't be problematic. Just fetch data from DB and based on it's properties render shapes.

    ReplyDelete

Post a Comment

Popular posts from this blog

[韓日関係] 首相含む大幅な内閣改造の可能性…早ければ来月10日ごろ=韓国

div not scrolling properly with slimScroll plugin

I am using the slimScroll plugin for jQuery by Piotr Rochala Which is a great plugin for nice scrollbars on most browsers but I am stuck because I am using it for a chat box and whenever the user appends new text to the boxit does scroll using the .scrollTop() method however the plugin's scrollbar doesnt scroll with it and when the user wants to look though the chat history it will start scrolling from near the top. I have made a quick demo of my situation http://jsfiddle.net/DY9CT/2/ Does anyone know how to solve this problem?

Why does this javascript based printing cause Safari to refresh the page?

The page I am working on has a javascript function executed to print parts of the page. For some reason, printing in Safari, causes the window to somehow update. I say somehow, because it does not really refresh as in reload the page, but rather it starts the "rendering" of the page from start, i.e. scroll to top, flash animations start from 0, and so forth. The effect is reproduced by this fiddle: http://jsfiddle.net/fYmnB/ Clicking the print button and finishing or cancelling a print in Safari causes the screen to "go white" for a sec, which in my real website manifests itself as something "like" a reload. While running print button with, let's say, Firefox, just opens and closes the print dialogue without affecting the fiddle page in any way. Is there something with my way of calling the browsers print method that causes this, or how can it be explained - and preferably, avoided? P.S.: On my real site the same occurs with Chrome. In the ex