Questions relating to the dynamic family of functions in Mathematica, such as Dynamic, DynamicModule and Manipulate.

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5
votes
2answers
88 views

Using gamepad without dynamic

I am a novice using Mathematica. I program regularly using c like languages though. Now i work on a simulation of a vehicle. I have a loop that calculates the next state of the physical model every dt ...
5
votes
1answer
205 views

How to make a piece of a pie chart change color upon clicking it?

I am trying to use the EventHandler and have managed to make the text change color upon clicking it, but cannot seem to make each piece of the pie chart change ...
5
votes
1answer
212 views

Using the keyboard to interactively and dynamically specify coordinates in a grid (a la Battleship board game)

In Mathematica, it is possible to create a Table or Grid of \[Placeholder] boxes. For ...
5
votes
1answer
209 views

Why does Dynamic output cause CPU usage when onscreen?

I write such a line in Mathematica: {Slider[Dynamic[s]], Dynamic[f[x_] := s*x]} After evaluation, the CPU immediately runs at full power. And if you scroll the ...
5
votes
1answer
431 views

Progress indicator with shared variables

I'm trying to create a custom progress indicator for a parallelized computation, using Dynamic and SetSharedVariables to display ...
5
votes
1answer
71 views

Using a progress bar in a functional expression

If we have a procedural construct like a Do loop or Table, it is straightforward to make a progress bar to indicate the percent ...
5
votes
1answer
149 views

Is there a way to make an interactive plot so one can pan and zoom?

My googling efforts returned nothing so I thought I'd ask here. I often make a ListPlot[] with a huge array, and sometimes it has smaller features that I'd like to take a closer look at, but aren't ...
5
votes
2answers
105 views

How to robustly apply ToBoxes to a Dynamic expression?

Inserting a Dynamic object in a boxform expression messes up syntax colouring. See the following example. where the variable ...
5
votes
1answer
200 views

How can I use Dynamic to run a script when a new file is added to a directory?

I have an external program saving files to some directory on my hard disc. I'd like to run a script that imports and runs a script on each file as it is added to the directory. Is there a simple way ...
5
votes
2answers
473 views

Interactively select a row/column of a Grid

I need a simple way to display tabular data (preferably with Grid) and also be able to select a row or column of the table. I've tried different approaches, but I ...
5
votes
1answer
112 views

ListPicker with conditional selection

I am reading data from a SQL Database and want to manually sellect multiple rows. ListPicker works very nicely, the only added complication is that I need to not only select the records, but also ...
5
votes
1answer
108 views

Why does a heavy background slow LocatorPane from updating, even if only the locators are Dynamic?

I'm having some trouble getting a dynamic plot to operate efficiently, and I think I've tracked down at least part of the problem to some pretty weird behaviour on the part of ...
5
votes
1answer
295 views

How to convert String to an Expression inside Manipulate which depends on control variable

Normally, in Global context, these 2 are equivalent eqn = "r-x"; r = -2; Plot[ToExpression[eqn], {x, -5, 5}] and ...
5
votes
1answer
394 views

Make EventHandler work for clicks and keys in a Dynamic display

I am trying to write a way that will do certain events depending on what screen is showing. What happens so far is that the screen will change in accordance to a click, but when you try to do the ...
5
votes
1answer
229 views

What changes in Dynamic have occurred from Mathematica 7 to Mathematica 8 that might induce incompatibilities?

I have a function that outputs a Manipulate (say FAnimated[params_]:= Manipulate[F[params,t], {Time, Animator[t]}] where F ...
5
votes
1answer
187 views

Dynamic panel crashes Mathematica 10.0.0.0

This answer by @paw have revealed a bug that causes Mathematica v 10.0.0.0 to crash the GUI and kernel. So far the offending code is this: ...
5
votes
1answer
324 views

Function that evaluates in notebook does not evaluate in CDF

I am trying to access the values of a dynamic value outside function package. Within the function package, the function is defined under the Dynamic module option. There is an error with this. I ...
5
votes
1answer
108 views

FlipView can't handle CurrentValue[“MouseOver”]. Kernel crash

Is this code crashing your Mathematica session? (it can so look out :P) ...
5
votes
1answer
203 views

Make dynamic controls from existing list

I have a list of variables (c1,c2,c3,c4), each with its ...
5
votes
1answer
161 views

How to make MousePosition more reliable

This takes a little patience to reproduce, but I got a screenshot of it in version 9 on Mac OS X 10.7.5: With a small Graphics object, it occasionally happens that ...
5
votes
0answers
97 views

Trouble understanding TrackedSymbols

While developing a relatively complex demonstration for Manipulate I encountered the problem that my output was unintentionally self-updating in an endless loop. ...
4
votes
4answers
812 views

How to change color dynamically?

I am new to Mathematica and want to change the FillingStyle Dynamically in this Plot. I want ...
4
votes
4answers
229 views

How to avoid writing $K$ loops?

I want to evaluate a mathematical function of $K$ variables each of variables varying between 1:N. One way to do this is writing $K$ loops and varying variables accordingly, as shown below: ...
4
votes
3answers
179 views

Using Mouseover to change the appearance of a button without writing the button specification twice

When I code in Mathematica, I often find myself having to repeat large chunks of code for a function to work. The latest example of this is a color changing button that prints when clicked, code shown ...
4
votes
2answers
307 views

How can I change a Slider's appearance?

I am using Mathematica 9.0 and Windows 7. I want to create a Slider that looks like the following: I tried the following: ...
4
votes
2answers
188 views

How to execute a function each time the slider is dragged?

I've created a function f and a slider: Slider[Dynamic[y],{1,4}] How to execute/call f ...
4
votes
2answers
443 views

How can one popup menu be used to add another?

I'm trying to construct a GUI that changes depending on what's chosen in certain popup menu's. For example: The default state of the menu is condition one, but when the first PopupMenu is selected ...
4
votes
3answers
359 views

How can I compare a dynamic variable with a literal in Mathematica?

I'm doing a Mathematica Notebook and I want to make an alarm clock. Something like this: ...
4
votes
2answers
106 views

Write GUI to select spheres in a grid

I'd like to generate a code that: 1) starts with a grid of circles (in general, it won't be a square grid) 2) allows the user to choose some of those circles 3) allows the user to choose the type of ...
4
votes
3answers
159 views

Dynamic ListLinePlot

I have a list of lists looking like this: {{{x1, y1}, {x2, y2}}, {x1, y1},...}}. Furthermore I have defined a legend, which is taken from the filenames. Now I want ...
4
votes
2answers
229 views

How to set the timeout of the preemptive link?

I apologize if this is a RTFM question, but I couldn't find this in the docs. How can I set the timeout of the preemptive link? For example: ...
4
votes
4answers
153 views

Make a slider controlling a generated character's code value

If I execute the following code: char = 97; Slider[Dynamic@ToExpression@FromCharacterCode@char, {0, 5}] the slider will fail to change the value of ...
4
votes
3answers
565 views

Dynamic[] and Print[] [duplicate]

Possible Duplicates: Intermediate display similar to PrintTemporary Estimating progress on plots How to create a progress bar? How to determine how much of a table is generated? I'm ...
4
votes
3answers
201 views

Is it possible to replicate the “magic” of OptionPatterns[] with DynamicModule's local variables?

Creating richer interactive interfaces that are generated by a DynamicModule invariably requires more complex data structures and in particular, a larger argument ...
4
votes
2answers
224 views

Tracing a path on a polar coordinate grid

I attempt to trace the path of a point when shift-dragged on a polar coordinate as shown on the picture below. But I only managed to snap the point to the grid. Insight on how to accomplish this? Any ...
4
votes
3answers
430 views

Slow image manipulation

This is some extremely simple code that shows an image and manipulates a circle (that will be used to select a region of the image to analyze). All those Dynamics ...
4
votes
1answer
272 views

Evaluation inside Button stops after some seconds

I would like to trigger a long calculation inside a dynamic module with a Button. It seems that the evaluation stops without an error-message after some seconds. I made a test outside the a dynamic ...
4
votes
2answers
158 views

Fill curve betwen specified abscissa points [duplicate]

I am plotting the Maxwell-Boltzman distribution of molecular speeds. I want to be able to select a region to integrate using a manipulate function. Then I want to have that same region filled in on ...
4
votes
1answer
99 views

Question about usage of Style as Dynamic object

I saw a Dynamic snippet in this answer, which wrote ...
4
votes
1answer
173 views

Automatically tracing and keeping ViewPoints in a list while manually rotating 3D graphics

I will need to make a video from the manual rotation of a 3D graphics. In order to do this, I will need to record the set of all view points that I made during rotation. There is method that we can ...
4
votes
2answers
272 views

How can I emit a sound only during a mouseover?

Emitting a constant sound or note (no interruptions) for a fixed duration is easy, but a dynamic duration, not so easy.
4
votes
2answers
93 views

Button that starts an evaluation which is monitored with a progress indicator

I have a DynamicModule in which I which I wish to start an operation (actually import files) with a button. I would like to monitor the progress with a ...
4
votes
2answers
151 views

DynamicModule updating unexpectedly

I have cut down a DynamicModule that was updating unexpectedly and found the following behaviour I don' t understand. If I do this I get one random value as expected ...
4
votes
1answer
137 views

Using Dynamic with UpdateInterval and EventHandler Together

I've been having some difficulty with the aforementioned use of these three functions/options and would greatly appreciate some help. I know that they're is probably an easy way of making a disk move ...
4
votes
3answers
212 views

How can I create a custom control which evaluates to a list of values or replacements?

I have a set of variables which are used in various places in my calculations (solving a system, initial conditions, etc.). In order to make this easier to deal with, I want to make a control-like ...
4
votes
1answer
101 views

Unwanted interaction between instances of a Manipulate function

The function trajectory below is defined in terms of Manipulate and calls the auxiliary function ...
4
votes
2answers
191 views

Manipulate in Manipulate

Question 63982 (Altering values in Manipulate with dynamically generated controls) got a very interesting answer from @belisarius, in which he used a Manipulate ...
4
votes
3answers
179 views

Altering values in Manipulate with dynamically generated controls

I have a Manipulate whose controls are generated based on a parameter in a containing Manipulate: ...
4
votes
2answers
271 views

DynamicModule/Dynamic CheckboxBar Slow for Large Lists

I am trying to create a dynamic construct that takes a large list of expressions and allows the user to interactively select any number of entries for further manipulation. This is what I have ...
4
votes
2answers
170 views

TrackedSymbols affected by CurrentValue. Another problem with SetDelayed(:=)+OwnVales in Initialization

It is MWE, only a Disk[] that should print "Click" when clicked. Also "date... updating" ...