MATLAB: How to save/access an axes’s properties using the handles structure

axeshandles

What is the syntax I can use to save an axes that I defined in a code file into the handles structure, and how can I access this handle from other code files?

Best Answer

I made a script which uses

set(gca,'property','value','property2','value2')

and changes the default plot to look nicer.

Now, if you mean to say you have a figure with an axes, and h is the axes handle defined by one code. I believe you could do two things to get h from another piece of code. One is to set h as an output in the original code:

function h = myhandlefunction
h = plot(1:5);
end

then it will be in the work space if you call another function:

function another_function
h=myhandlefunction;
set(h,'color','yellow')
end

As long as you don't close the figure or delete the object that the handle references, this should work. You can also use findobj:

h = findobj(gca,'color','b');
set(h,'color','yellow')

to search for specific handles with matching properties. I hope I answered your question, good luck :)

Related Solutions

MATLAB: How to set the SelectionChangedFcn for the tabs group I have created

By writting the code like this:

%Setting the uipanel1 height, width and position as figure1
handles.uipanel1.Position = [0 0 handles.figure1.Position(3) handles.figure1.Position(4)];
%This line of code has to come before creating the tab group, otherwise the
%tabs won't have the same width height and position as figure 1, only the
%first one will.
% Create tab group with SelectionChangedFcn
handles.tgroup = uitabgroup('Parent', handles.figure1,'TabLocation', 'top','SelectionChangedFcn',...
    @(hObject,eventdata)Frogsim('tgroup_SelectionChangedFcn',hObject,eventdata,guidata(hObject)));
    % This line tells the uitabgroup function that the name of the callback
    % function for the selection change is named tgroup_SelectionChangedFcn
    % , and also sends in the input argument guidata(hObject) which is the
    % updated structure of handles and data , the eventdata is sent
    % automatically.
handles.tab1 = uitab('Parent', handles.tgroup, 'Title', 'Materials and Optics selection');
handles.tab2 = uitab('Parent', handles.tgroup, 'Title', 'Dispersion graphs');
handles.tab3 = uitab('Parent', handles.tgroup, 'Title', 'My Tab Label 3');
% Place panels into each tab
set(handles.uipanel1,'Parent',handles.tab1)
set(handles.uipanel2,'Parent',handles.tab2)
set(handles.uipanel3,'Parent',handles.tab3)
% Reposition each panel to same location as panel 1
set(handles.uipanel2,'position',get(handles.uipanel1,'position'));
set(handles.uipanel3,'position',get(handles.uipanel1,'position'));

Then the SelectionChangedFcn callback for the tab group called tgroup is set correctly. In this case my gui is called Frogsim , if your gui is called mygui then the third line should look like this:

    @(hObject,eventdata)mygui('tgroup_SelectionChangedFcn',hObject,eventdata,guidata(hObject)));

Later in the code I wrote the SelectionChangedFcn for tgroup like this:

% --- Executes on selection change of tabs in tgroup tab group.
function tgroup_SelectionChangedFcn(hObject, eventdata, handles)
% hObject    handle to tgroup (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

And then you can add whatever code you want to the selection change function.

To explain better what the third line did, the line of code:

@(hObject,eventdata)Frogsim('tgroup_SelectionChangedFcn',hObject,eventdata,guidata(hObject)));

creates an anonymous function that accepts the arguments

hObject
eventdata

then the anonymous function calls the function:

Frogsim('tgroup_SelectionChangedFcn',hObject,eventdata,guidata(hObject)));

what that does is to call the tgroup_SelectionChangedFcn function within Frogsim with arguments hObject and eventdata (That were passed inside by the anonymous function) and then the 3rd input argument is guidata(hObject) which will give the updated structure of handles and user data in a guide built gui, and that corresponds to the 3rd arguments of SelectionChangedFcn which is

handles

MATLAB: Do the static textboxes in the GUI print in gray color unlike the GUI background

The textboxes in a GUI not printing in the same color as the background is an expected behavior.

A workaround for printing the textboxes in white color is to set the background color of the textboxes to white. The color of the textboxes can then be reverted to the original color after the printing is completed. The following code can be added to the Shortcut to accomplish this task.

% Show Hidden Handles to identify the GUI figure
set(0,'showHiddenHandles','on')
% Identify the GUI figure
figureHandle = findobj(0,'Type','Figure');
% Extract the GUI's children
childrenHandles = get(figureHandle,'Children');
% Identify the textbox object handles
textBoxHandles = findobj(childrenHandles,'Style','text');
% Store the original background color of the textbox
originalBGColor = get(textBoxHandles(1),'BackgroundColor');
% Set the background color of textboxes to white 
set(textBoxHandles,'BackgroundColor','w')
% Print the GUI figure
print(figureHandle)
% Revert the background color of textboxes to the original color
set(textBoxHandles,'BackgroundColor',originalBGColor)

Note if using PRINTDLG (or other substitutions for PRINT) that you may need to allow printing to finish before the last line

set(textBoxHandles,'BackgroundColor',originalBGColor)

can be executed. Simply insert a PAUSE command or manually remove this last line and execute it separately.

Best Answer

Related Solutions

MATLAB: How to set the SelectionChangedFcn for the tabs group I have created

MATLAB: Do the static textboxes in the GUI print in gray color unlike the GUI background

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