CODEWITHSUNDEEP
matlabplotmatlab-figurematlab-guide
toshiomagic
toshiomagic

Reputation: 1649

Show axes and plots as they are created during GUIDE GUI initialization

I have a Matlab gui created in GUIDE. When I click a button in gui_A, it opens a new figure window for gui_B (different fig and m files for both). The plot takes a long time to generate each item on it, so I want to plot each item as soon as it is ready. However, I can't seem to figure out how to get the window to render FIRST, and THEN plot things on it. I've tried using pause(1) and drawnow but neither have the desired effect. Here's some sample code for what I'm doing:

in gui_A

function open_gui_b_btn(hObject, eventdata, handles)
    gui_B(handles.var1, handles.var2);

in gui_B

function gui_B_OpeningFcn(hObject, eventdata, handles, varargin)
    handles.output = hObject;
    handles.var1 = varargin{1};
    handles.var2 = varargin{2};
    % set some variables here
    % plot something on an axis

    % Try to render on screen
    % drawnow % doesn't work
    % pause(1) % doesn't work

    % plot the rest of the things
    plot_things(handles)

function plot_things(handles)
    for i = 1:length(handles.something)
        % computationally expensive process
        plot(handles.axis1, handles.var1b, handles.var2b);
    end

Obviously I would like for the window of gui_B to render on the screen and then have the plot things function plot all the things as soon as they are ready so the user can watch the progress.

Upvotes: 1

Views: 108

Answers (1)

Suever
Suever

Reputation: 65430

The issue is that when loading the GUI, GUIDE will (by default) set the Visible property of the figure to 'off' so that a potentially incomplete GUI won't be shown to the user. It will toggle the Visible property back to 'on' after all initialization is complete. You can alter this behavior by manually settings the Visible property to 'on' within your OpeningFcn 

function gui_B_OpeningFcn(hObject, eventdata, handles, varargin)
    handles.output = hObject;
    handles.var1 = varargin{1};
    handles.var2 = varargin{2};

    % Make sure the figure is visible
    set(hObject, 'Visible', 'on')
    drawnow

Or you can initialize your GUI by providing the Visible property in the function call

gui_B('Visible', 'on')

After doing that, you'll also want to add explicit drawnow commands after each plot command to cause the graphics to be rendered right away.

function plot_things(handles)
    for i = 1:length(handles.something)
        % computationally expensive process
        plot(handles.axis1, handles.var1b, handles.var2b);

        % Draw each plot as it's available
        drawnow
    end

Upvotes: 0

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