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draggable

version 1.3.0.0 (11.5 KB) by Francois Bouffard
Allows graphical objects to be dragged in a figure.

36 Downloads

Updated 10 Jan 2013

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Editor's Note: This file was selected as MATLAB Central Pick of the Week

This function enables a graphical object (be it a line, plot, patch, rectangle, text box, etc.) to be dragged inside an axis, with a very simple syntax ("draggable(h)"), following or not horizontal, vertical or diagonal constraints. Limits can be imposed on the object's movement.

Some figure properties are changed by the function, but previous properties are restored as soon as the drag is stopped. The behavior of the object can be reverted to its original, non-draggable state, by issuing "draggable(h,'off')".

Typical uses of this function would include non-standard GUI elements, such as markers that are moved on a figure or image. A function which is called when the object is moved can be provided as an optional argument, so that the movement triggers further actions.

See the provided file dragdemo.m for usage examples.

Comments and Ratings (44)

Lai man

Kerim: it should be possible. Take a look at the 'polymove' example in dragdemo.m and modify it to suit your needs. In that example, the line is closed but it is straightforward to make it a general plot.

Nice! Is it possible to independantely drag points of the same line? I mean I plot 2D data and I want interactively edit it.

Zilong Liang

wei xu

wei xu (view profile)

What an absolutely brilliant function. Thank you for making it.

Excellent, thank you! Did exactly what I needed to create an adjustable curve with as many manual adjustment points as needed, which I can then interpolate smoothly between.

Hi HpW. Check the 'sliders' demo in dragdemo.m for an example on how to use the end function. You can't send arbitrary arguments to the end function. It is specified this way for object handle objh:

draggable(objh, ..., 'endfcn', @myendfcn);

Function myendfcn should only have a single argument, and the handle objh will be passed as this argument. So if you want to send more arguments to myendfcn, tuck them in the objectusing setappdata/getappdata on objh.

Hope this helps.

HpW

HpW (view profile)

Really nice! Im having trouble using this in a large GUI with multiple axes. I can get the objects/lines to move by dragging, but I cant get the endfunction to play nice with handles. Any ideas on how to make this work? Tried passing handles in the endfunction like {@end_function,handles} but that doesnt seem to work.

HpW

HpW (view profile)

Guojin Feng

Chaoyu Zhang

Gabriel Marsh

Jess

Jess (view profile)

Bhar_tex

Excellent!

Aldi Wijaya

Excellent Work, thanks Francois

Yang Yu

Armindo: this is possible by changing the axes limits (using xlim and ylim) inside the callback function provided as a parameter. I'm trying to make a demo but doing it so that it's not confusing to the user (e.g. axes panning too fast) requires care.

Armindo

Very nice...

would be possible to drag an object horizontally while updating the axes 'xlim' property.

Basically I need to be able to drag a patch and while iam doing that when Iam near de limits of the plot the plot adjust the limits so I can still be able to drag...

Can you help me on this please

Sergei P.

Manuel

Manuel (view profile)

liu

liu (view profile)

samfort

Well written, and plenty of demos... I am speechless, exactly what i was looking for!

More precisely I loved how accurate and concise are both the demo code and the function itself! Well done!

Scott

Scott (view profile)

I had to create an account and a community profile to rate this. This is simply awesome! Thank you Francois!

Timo Dörsam

Yi Sui

Yi Sui (view profile)

This function allows me to place comment boxes on the plot and manually adjust them before inserting in presentation

Shahab

Shahab (view profile)

Excellent, tahnks

Shaun's problem should be fixed now; I instead simply used fgh = gcbf; -- it should work in all situations. Thanks to Esmerald Aliai for pointing out a similar bug.

Shaun

Shaun (view profile)

I love it, and I use it all the time.
One mod I have made for axes which live inside UICONTAINERS...

fgh = get(axh,'Parent');
while ~strcmp(get(fgh,'Type'),'figure')
fgh = get(fgh,'Parent');
end

Sorry for the years-long delay since the last update... The Jan 13 update contains a bug fix by G. Fortin and Steven Bierer's drag-end function call. I'll try to add Brett's suggestion shortly.

Brett Shoelson

Most excellent work...rock solid!

Steven Bierer

An excellent, deviously simple tool. The code is well commented, and I was easily able to modify it to include a new input argument: a function handle that executes AFTER the object has been dragged. (I will contact the author with this addition, in case he'd like to incorporate it.)

Thanks!
I used it to move text, and it worked well after adapting your code to objects having a "Position" property of 3 values.

Nathan Tomlin

Wow, amazingly well done!

Chris Sarantos

Excellent, just what I was looking for!

Paul Premakumar

Very handy file!

Tom Nagel

I love it because it learns me a lot about mousebutton handling.
I tried to make a text object draggable: that doesn't work!

w L

Laszlo Balkay

It is a really great work with impressive options.

Congratulations!

Ohad Gal

Well done.
you might want to add an option for the following:
1. force a movement of the object, using an outside calling function.
2. enable the user to choose it's rendering mode
3. export (and update a given edit box) the DX and DY movement of the object

anyways, It's great. thanks you !

Ohad.

Updates

1.3.0.0

This update fixes a bug found by Esmerald Aliai in which draggable would not work for axes embedded in Panels. In fact this should also fix Shaun's bug mentioned in March 2012.

1.2.0.0

Major update. Now supports text objects. Diagonal constraints with arbitrary slopes added. Single call for applying draggable on multiple objects sharing the same parameters supported. Added the 'sliders' demo in dragdemo. General cleanup.

1.1.0.0

implemented a feature and fixed a bug (both user-suggested)

1.0.0.0

Bugfix for Matlab 7+: axes no longer disappear. Renderer option removed.

- Bugfix: yet another correction to movement computation. Now behaves correctly when mouse is out of axes.

- Bugfix: sanitized movement computation.
- The 'snapgrid' demo has been simplified.
- The 'polymove' demo has been polished.

- Bugfix: now works with 1-element plot and line objects
- Added: polygon with draggable vertices in as demo 'polymove' in dragdemo

- Changed the category from "GUI tools and examples" to more accurate "Graphics: Graphical Data Exploration and Interaction".
- Now distributing .zip archive containing both draggable.m and a demo function, dragdemo.m.

Changed the category from "GUI tools and examples" to more accurate "Graphics: Graphical Data Exploration and Interaction".

MATLAB Release Compatibility
Created with R13
Compatible with any release
Platform Compatibility
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