I'm working on creating a GUI in matlab using GUIDE. However, i'm not exactly sure how to do the following, and was looking for some tips/advice.
Problem
I want to open a directory and display all the images in that directory in the GUI interface when if it's selected. However, since I will never know exactly how many images there are I am not entirely sure how to do this in the GUI.
Essentially, I want to open the directory and all the images to be displayed in a grid on the GUI similar to that in iphoto.
Current code
Currently, I can open a directory fine, and get all the required information as follows:
directory = uigetdir(pwd, 'Directory Selector');
files = dir(fullfile(directory, '*.jpg'));
strcat(strcat(directory, '/') , files.name) %outputs each file's location
I'm just not sure how to translate this information into the GUI without writing numerous handles.axes1. I understand that since I know this info I could loop over them, but would I not have to create the axes to begin with?
You probably don't want to do this with individual controls - the reason is that MATLAB will have to render each and every one, which will be slow if the directory has a lot of images. Clearly, you can only display a certain number of images on screen at once. You would also have to write your own scrolling code (or some kind of pagination control).
If you have MATLAB > R2008, you can put images in uitable cells using HTML:
% Example for a control with a 'String' property
set(handles.myControl, 'String', '<html><b>Logo</b>: <img src="http://UndocumentedMatlab.com/images/logo_68x60.png"/></html>');
See also this post and this Undocumented MATLAB page.
A different option would be to use the Windows common controls ListView.
A simpler way of doing this would be to have a single image and a listbox of files; an example is here
You can add components to a GUI pprogrammatically. There's more information here.
Each new axes can be added with something like this:
ah = axes('Parent',hObject,'Position',[left bottom width height]);
where left, bottom, width and height define the size and position of the axes. You'll need to change the position for each axes you create and keep track of the axes handles.
Related
I have made a Gui program that I compile to EXE application which lots csv file into graph data. I buit a save button but I do not know how save figure with different name each time cause (savefig anduisave both uses matlab program). I am posting my code below if anyoff you guys figure out how to save gui figue into image or anything that does require matlab to open. Last function is the callback function for save button.
function ma_Callback(hObject, eventdata, handles)
% i tried uisave but not possible to run computer without matlab cause mcr
% does not run uisave
% i tried copyopbj but since i did not put a name on my figure it did not
% work
%savefig
If you are trying to save a kind of image from your figure, then the best option which supports many aspects, is using print function.
I have already done this in a compiled app and it works perfect. Using print function you can set different file type(vector formats like *.svg are also supported), resolution(dpi), and so many others.
Although you can use print function directly on the figure, but I found that the best way (More Customization like removing or adding some objects and changing many options) is to follow this steps:
Create another figure with Visible='on' but a position that is out of screen with the same width and height of Main Figure.
normalized position = [-1, -1, ?, ?]. (Create this figure in start up and don't destroy it until your app exits, let call it Print Figure).
Copy your figure content (or the parts you are interested in) using copyobj to that figure (you may need to set Parent property of some key objects like panels to this new figure). They would look exactly as they look in the main figure, because they have the same properties. you can add or remove some objects in this step.
Change aspect ratio of "Print Figure" for a better output.
Print this figure with all options (file format, dpi, ...) you need. in my own GUI i allowed the user to change this settings with an input dialog.
In my app i used functions like winopen to show the output, and output directory to the user, when the print task was done. Print process takes some time, specially if dpi is huge, so it is also a good idea to inactivate buttons and show wait cursor.
Update:
a simple usage would be:
print(MainFigure, 'myFileName', '-dpng', '-r300')
I used Matlab GUIDE to create a GUI.
It is displayed mid-screen.
How can I position it at the top of the screen; so that the top edge of the GUI window is at top of screen.
It will be used on different Windows 7 computers with different screen resolutions.
I tried to set hObject.Position(2) but it doesn't do what I want.
I think the simplest way would be to use movegui in the OpeningFcn of your GUI with the appropriate argument, i.e. using either 'north', 'northeast' or 'northwest'.
The calling syntax is quite simple, using the handles to the figure created. In GUIDE, the default name for figures is "figure1", so in your case the code would look like this (unless you changed the figure's name):
movegui(handles.figure1,'northwest') %// or whatever
Note that movegui calls the following 3 functions to get the screen size and monitor positions/units:
screensize = get(0, 'ScreenSize');
monitors = get(0,'MonitorPositions');
old0units = get(0, 'Units');
So you could do the same to make the calculations yourself in order to place the figure precisely where you want if the above solution is not sufficient for you.
I want to edit a certain property of MATLAB figures saved as .fig (MATLAB's default format) files.
I create a lot of graphics-intensive figures in a script, so I choose not to display them by making the default figure invisible with set(0,'DefaultFigureVisible','off'). This sets the 'Visible' property of any new figure to 'off'. This way I can create, edit, save, etc., figures without the need to draw them, which can be taxing on CPU, GPU and their memories. I save the figures as .fig files using the saveas(handle,'filename.fig') command. This also saves the 'Visible' property, which is a problem when I do want to open the figure (e.g. by double-clicking the file in my Windows Explorer). It loads the figure, but it doesn't display it because its 'Visible' property is set to 'off'.
I want all .fig files to be saved with the property set to 'on', but how can I achieve this without displaying (= taxing) the figures? The moment I use set(handle,'Visible','on'), the figure is drawn.
So basically, I want to edit the file on a lower level than when it's loaded as a figure in MATLAB.
I think it could be done as follows, but I do not know exactly how to achieve it. One can load the .fig's data as if it were a .mat file using s=load('filename.fig','-mat');. This loads a structure s containing some fields that contain all the figure's data, properties, etc. Now, the figure handle must be found in this unkown structure and the 'Visible' property that goes along with the handle edited.
Can this be done without the figure being drawn?
I tried, but haven't succeeded, using fopen, fread and their friends.
Does anybody know how to do what I want to do?
I base my solution on the thread from the url posted by user4506754: http://www.mathworks.com/matlabcentral/newsreader/view_thread/306249
There, Jesse Hopkins posts (post 15) that you can edit a property 'ResizeFcn' to execute a function when MATLAB creates a figure. This doesn't work on my MATLAB installation, but lead me to look into the different functions you can attach to a figure in its properties. This page documents all figure properties: http://mathworks.com/help/matlab/ref/figure-properties.html. There I found the 'CreateFcn' property. Its description contains:
This property specifies a callback function to execute when MATLAB creates the figure. MATLAB initializes all figure property values before executing the CreateFcn callback.
It means that the figure is loaded with its properties, including the 'Visible' property being 'off' and then 'CreateFcn' is called.
Setting 'CreateFcn' to make the figure visible then solves my problem.
set(gcf,'CreateFcn','set(gcf,''Visible'',''on'')')
An example:
ezplot(#sin) % draw a simple figure containing a sine wave, title, etc.
set(gcf,'Visible','off','CreateFcn','set(gcf,''Visible'',''on'')' % this disables the figure and set the 'CreateFcn' property simultaneously
saveas(gcf,'sin.fig') % save the figure in the current folder as a .fig file
close % closes current figure
Now go to the current folder in your Explorer and double-click the sin.fig file. It makes MATLAB load it and, poof, the figure is drawn.
Solution found.
This doesn't edit the .fig file, as I originally asked (as a solution), but it is an alternative solution to the original problem. Now I can create and save figures without them being visible, but draw the figures the moment they're loaded by MATLAB.
I have tried most of the usually used options (print(figr, '-depsc', 'cross_corr.eps');) to save a matlab figure as eps/pdf but each time I do it, the figure contents are saved partially and perhaps one quarter of it is lost.
I have shared the figure here: http://ge.tt/2ZrsdD02/v/0?c
Using the options such as the following save it completely but I prefer it save it directly inti eps/pdf:
print(figr, '-dpng', 'cross_corr.png');
The problem seems to be that you have very small values in the 'PaperPosition' property of the figure. Try changing them to the default ones,
set(figr, 'PaperPosition', [0.634517 6.34517 20.3046 15.2284])
and then apply your print(figr, '-depsc', 'cross_corr.eps').
I attach results on my computer without and with 'PaperPosition' correction (using GSview with bounding box showed):
Also, consider reducing font size to avoid overlapped text:
set(findobj('type','text'), 'Fontsize', 5)
If I first enlarge the figure size (by using the middle button on the top right), and then save it as eps, I get this: http://ge.tt/1Pv8YE02/v/0
The quality is very nice as compared to all other options and the content are also ok.
Its not possible to automate it through script?...
I have some code that generates a number of MATLAB figures. At the end of my program I want to publish these figures in a report. I have a script, which is passed to publish(), that uses openfig() to include the figures in the document.
This causes these figures to flash up on the screen. This is particularly annoying when I am opening figures inside a loop using a combination of close and snapnow. I've tried making these figures invisible using
openfig(PathToFigure, 'new', 'invisible')
This stops the image appearing on the screen but also stops it appearing in the report.
Is there a way of including .fig files in the report without having them appear on screen?
Open the figure with f=openfig(PathToFigure, 'new', 'invisible'). Then move the figure off-screen by setting its Position property (perhaps to something with negative values for the left and bottom pixels), set its Visible property to on, call snapnow. Delete the figure.
I would actually recommend setting their visibility to 'off' when you create those figures with
f = figure('Visible','off');