canvas_x | canvas绘制海报,生成logo二维码。也可生成编辑界面,用户自定义输入,一键生成。 | Canvas library
kandi X-RAY | canvas_x Summary
kandi X-RAY | canvas_x Summary
canvas绘制海报,生成logo二维码。也可生成编辑界面,用户自定义输入,一键生成。
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QUESTION
I'm trying to find out where the user clicked on the canvas then display some stuff based on that. As you can see in my code I tried using xy coordinates but whenever I click somewhere else sharing the same x or y coordinate it alerts. Is it possible to have multiple canvases overlap each other or use different shapes that will trigger an event if mouse down on them?
...ANSWER
Answered 2018-Feb-25 at 21:15It looks like the issue you are having is with your if
statement.
Instead of having if (x < number || x > number)
you should have it if (x < number && x > number)
because you want to know if the user clicked inside something.
By the way, I highly recommend putting your if
statement like this:
QUESTION
I'd like to use vis.js for displaying and editing a graph (hence storing its nodes, edges and options). To implement this, I need to save changes of the network (=graph) on various events. On of them is rearranging via drag and drop.
Now, there's an on
method which supports the dragEnd
event meaning I can do stuff like
ANSWER
Answered 2017-Sep-07 at 17:15Ok, while reading docs and writing the question, I wild-guessed that the network
is actually this
in the event handler context. Not sure if it's true for all the event handlers but works with the dragEnd
one.
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