How can I change pushbutton background

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Tarcisio
Tarcisio 2014-12-10
回答： Daniel 2014-12-10
I constructed a number of pushbuttons by using the below loop, and now I want to change the background of each one when it was pressed.
for i = 1 : 8
for j = 1 : 7
btn(j,i) = uicontrol('Parent', figure_handle, ...
'Style', 'pushbutton', ...
'Position', [45+(i*51) 552-(j*50) 52 51],...
'Callback', @changeBG);
end
end
How can i get the correct button to pass to changeBG function? Can someone help me?
Thank you

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采纳的回答

Orion
Orion 2014-12-10
I'd say :
for i = 1 : 8
for j = 1 : 7
btn(j,i) = uicontrol('Parent', figure_handle, ...
'Style', 'pushbutton', ...
'Position', [45+(i*51) 552-(j*50) 52 51],...
'Callback', {@changeBG,i,j}); % add too arguments to changeBG
end
end
then in changeBG, something like
function changeBG(hobject,evendata,i,j)
if i==1 && j==1
set(hobject,'Backgroundcolor','r') % red for i=1, j=1
elseif ....
% same kind of treatment for each of your button
elseif ....
elseif ....
elseif ....
end
  1 个评论
Tarcisio
Tarcisio 2014-12-10
编辑：Tarcisio 2014-12-10
It works, but now I'm trying to pass a value of a matrix to the function. And I'm getting strange values:
[R,C] = size(matrix);
for i = 1 : C
for j = 1 : R
btn(j,i) = uicontrol('Parent', figure_handle, ...
'Style', 'pushbutton', ...
'Position', [45+(i*lColumn) 552-(j*lRow) 52 51],...
'Callback', {@changeBG,matrix(j,i),i,j});
end
end
I'm getting numbers like 50, 51, 48 ... and my matrix only have numbers between 0 - 7.

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更多回答（1 个）

Daniel
Daniel 2014-12-10
If you mean the background as a whole and not just the color... I normally perform this task by modifying the "cdata" of that pushbutton. That allows you for example to use images as pushbutton background. Be careful by defining the size of the images so they fit properly inside the pushbutton you defined.
Hope it helps!

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