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Questions tagged [eventhandler]

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Using EventHandler in Slider [duplicate]

In general, I want to be able to load a new data using my function getECGsignal, according to the new slider value. I tried the following code, but it is not ...
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0answers
24 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: ...
9
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1answer
290 views

Making an interactive visualization of the eigenvectors of two-dimensional matrices

I've recently stumbled upon this very nice interactive visualization of eigenvectors of two-dimensional matrices, and how powers $A^k$ act on various vectors. How can this sort of visualization be ...
3
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1answer
53 views

EventHandler and Dynamic

I just found a behaviour of an EventHandler that I cannot explain. Here is a highly simplified version. I will present two simple ...
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1answer
59 views

Multiple calls to SetOptions with NotebookEventActions: How to retain earlier custom event handlers?

I have a module defining handlers of KeyDown events that I reuse in various notebooks. In some cases I need to define separate handlers for additional keys. Unfortunately, later calls to ...
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0answers
45 views

Mathematics behind 3D point dragging

In several answers to questions related to dragging a point in 3D (for example: How can I select one out of several Graphics3D objects and change its coordinates in Mathematica?, or How can locators ...
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0answers
23 views

How can I disable built in selection action for mouse click events? [duplicate]

I am trying to improve a demonstration that I previously submitted to the Wolfram Demonstration site. That demonstration enables a user to select a position on an Earth globe and see the latitude and ...
0
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1answer
42 views

Help with actions in EventHandler

I am trying to write a program where the user types on the keyboard in a specified location, and Mathematica outputs what you are currently typing, plus a prediction that is updated in real time of ...
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0answers
94 views

Automated Phone Attendant with Mathematica [closed]

I'm considering using an old notebook with a built-in modem as an automated attendant. Basically, it would have the following functionalities: static menu pre-recorded messages caller interaction via ...
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0answers
31 views

Is there a “LostFocus” event for controls? [duplicate]

In .Net controls have a LostFocus event that fires when the control is no longer the active object; tabbing to next control or clicking somewhere else on the ...
4
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1answer
99 views

Modify Dynamic value within EventHandler

I'm trying to build a tic tac toe program using a 3x3 board list running inside of a DynamicModule with a separate window displaying the current value and accepting ...
3
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0answers
36 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 ...
2
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1answer
50 views

Plotlabel in Monitor

I am using three For loops and would like to show a series of plots in the same window. I am using Monitor and I want to see the parameters in each plot. Here is my code: ...
7
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1answer
1k views

How can I get 'KeyDown' without writing 26 commands?

EventHandler and {"KeyDown","x"} work for registering a specific letter. Is there a direct way to return whichever letter keys ...
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1answer
28 views

Modifying this GoL implementation to make it sensible to clicks on the corner of the array

I'm interested in modifying this interactive implementation of the Game of Life http://demonstrations.wolfram.com/RealTimeSimulationOfTheGameOfLife/ to make it sensible to click events on the ...
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2answers
89 views

Plot with different line style when clicked

I have a plots with many lines and would like to be able to highlight lines when clicked (or on mouseover). When the data plotted is small this works well ...
11
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1answer
136 views

Visually permute rows of a matrix via mouse dragging

I'm looking for a way to permute the rows of a matrix visually via mouse dragging, for example by clicking and dragging on a row in the MatrixPlot corresponding to the matrix. What would be the best ...
1
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1answer
38 views

Why are changes to dynamic value not delivered to all GUI elements as they happen?

The widget below is just a toy that I put together so that I could ask this question. ...
10
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1answer
270 views

How to create Right-Click ActionMenu at mouse position?

I have a Grid and need to enable some actions on individual values. For this I want to use an ActionMenu that shows on right-...
5
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1answer
180 views

Response of Dynamic is slow

I wrote the following code to make an interactive GUI for Mathematica's Neural Network example of Digit Classification Here is the Code ...
4
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1answer
92 views

How to use an event handler inside of a Dialog Notebook

I am designing a tank game in Mathematica for my class and currently I have a tank that can drive along a curve and shoot a point at a set angle, but I want to get all of this into some sort of pup up ...
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2answers
122 views

How can I draw a variable number of dynamic, interactive objects, preserving their internal states?

Consider the following toy example: I have a "dynamical, interactive" graphics primitive like the following: ...
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0answers
65 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 ...
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0answers
122 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 ...
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2answers
113 views

Very slow updates using LocatorPane [closed]

Making an app for conic sections I need that when point ptA is moved, point ptB shifts the same distance and in the same direction of ptA (i.e. a translation). This is the (simplified) code. ...
17
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1answer
2k views

How to draw an interactive, mouse clickable, 3D Bloch sphere?

A 3D Bloch (Poincaré) sphere is nicely shown in this wolfram demonstration. However, in that example, it is not possible to mouse select a point on the sphere and directly get the corresponding qubit ...
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0answers
63 views

How to implement multiple EventHandlers? [duplicate]

n00b Mathematica user here. I wrote this code: ...
0
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1answer
79 views

How to trigger an event whenever the variable controlled by an InputField is changed?

Consider an an InputField object of the form DynamicModule[{x = 0}, {InputField[Dynamic@x],Dynamic@stuffDependingOnx} ] ...
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2answers
119 views

How does EventHandler work inside a Graphic

I've created an application with the User Interface being a Graphic with lines, polygons etc. The functionality I need is: to be able to place the objects anywhere in {x,y} coords of the Graphic. to ...
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2answers
123 views

Abort an EventHandler?

How do I stop an EventHandler? I'm trying to allow the user unlimited inputs on the arrow keys UNTIL certain conditions are met, and then stop the ...
3
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1answer
89 views

How to mimic CheckboxBar's Method->“Active” option in a Manipulate's checkbox control?

CheckboxBar has a Method -> "Active" option that allows you to click the label to change the state of a checkbox. I would ...
3
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1answer
349 views

How to Use Mouse Events & EventHandler in Demonstrations

One of the primary criteria for an acceptable Demonstration is, of course, that multiple copies of the Manipulate Output Cells [MOCs] have to have independent controls and datasets: the operation of ...
0
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1answer
161 views

How can I manually pick the data out of the image of a plot?

edit: The automatic way listed here doesn't work for an application like mine in which there are several curves on the same plot that all have the same markers, but you only want one curve (it will ...
8
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1answer
137 views

Docked cell showing keystrokes and mouse buttons actions

When I send bug reports to WRI, sometimes I attach a screen video record, like on the following example (that I just sent as an improvement suggestion). As you can see, I use OSD Hotkey, to make sure ...
5
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1answer
106 views

Triggering events based on choices made inside of system dialogs (e.g. window close)

I'm trying to arrange for Mathematica to perform a certain action every time a notebook is saved or closed (with or without saving). The obvious way to do this would be through event handling. So, ...
1
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1answer
119 views

How to update plot with EventHandler without using Print

Consider the following code: ...
3
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2answers
79 views

How to get highlighted text from event

I want to do the following: Given a text in a Mathematica dynamic module "at runtime". If some text is selected with the cursor/mouse, after the mouse button release, get the selected text. Thank ...
5
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1answer
71 views

Dynamically highlighting elements sharing common properties

I want to make a table of elements such that when the cursor is over a target element, all other elements of the table sharing some specified common property with the target are highlighted (let's say ...
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0answers
75 views

How can I perfect this game for Wolfram Demonstration publication? [closed]

When the messages change the window inactivates, and when I try to host an interactive CDF on my site it turns red and says something about numbers having to be scaled or offset. Any help? I'm ...
3
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0answers
42 views

EventHandler click event in Graphics[ ] object does not work properly after using Deploy [duplicate]

There is a problem clicking layered Graphics objects after using Deploy. For example, the code below works as intended with the Disk 'on top of' the Line. Click either object anywhere and EventHandler ...
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1answer
159 views
7
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1answer
321 views

What is “MouseDragged”?

Bug introduced in V10.1 or earlier and persisting through V11.3 Print is triggered just by pressing the mouse button. ...
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1answer
287 views

How to combine manipulate and eventhandler

I combine manipulate and eventhandler, now I can change the controller when working on eventhandler, but how to change the value in eventhandler when I control the manipulate controller? ...
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1answer
65 views

Using Loop to create mutiple EventHandlers

I have a problem, that is I want to use loop to create multiple EventHandlers, but my code shows nothing. What can I do? ...
9
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2answers
381 views

Throttle the response to keystrokes in an EventHandler expression

What might be the most elegant way to throttle the a,s functions triggered by an EventHandler...
3
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4answers
593 views

EventHandler Not Detecting KeyDown

I am trying to use EventHandler to detect KeyDown within a LocatorPane. Anytime I press a key inside the LocatorPane the proper action is not executed (doesn't matter which key I choose) but rather ...
3
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2answers
150 views

Circumnavigate a curve (part 2)

I got help from Kuba on a previous post regarding this issue I'm having but after integrating that solution into my code, the problem changed and I am left with something I don't know much about (even ...
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0answers
101 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 ...
0
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1answer
145 views

What is wrong with combining two programs with event handlers?

I can delete the unwanted nodes of a RandomGraph by double-clicking on them from the first program, and I can change the positions of the nodes by dragging them ...
7
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2answers
272 views

Why the Mouse dragging response not as smooth as Locator

I am experimenting to use MouseDragged eventhandler to change the vertices positions of a triangle, it works, but not as smooth as using Locators. Is this the ...