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Questions tagged [eventhandler]

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6 questions with no upvoted or accepted answers
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225 views

Is it possible to model the piano key attack?

My purpose is to model the attack of a piano key. As the key is pressed a sound must be emitted. When the key is released the sound must stop with decreasing volume. I have a partial success when ...
3
votes
0answers
40 views

Is it possible to prevent LocatorPane from modifying locator positions unless Alt ket is down?

I am using the LocatorAutoCreate option which allows the user to hold Alt while clicking in order to create/remove locators. However, I need to be able to prevent ...
1
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0answers
28 views

Why does dragging a point with a Tooltip interfere with MousePosition[“Graphics”]?

Consider the following toy example of EventHandler used to implement dragging a point around in a Graphics: ...
1
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0answers
80 views

Custom FrontEndToken calls

So I've been playing with FrontEndTokens recently and discovered that there are some of them that don't seem to have a standard-usage way of being called. For ...
1
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0answers
123 views

Making graphic objects disappear interactively

I am trying to create a program where dots on a plane disappear when an object passes over them. I am using EventHandler to code the arrow keys for control of the ...
1
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0answers
106 views

Strange behavior of my vertex eventhandler!

I have two level EventHandler. The inner one is made of vertex of Graph and the other outer one is of the Dynamic Graph. (1) If I select a arbitray place on the Graph except a vertex, then every ...