Why does button group not work?
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Hi Guys,
I am making a GUI which, to all intents and purposes, plots some data. I wanted a set of radio buttons to change the plot colour. To make sure only one colour was selected I used a button group. When I ask to see the radio button call back I am told the uiButtonGroup (plotColour) is managing the call back. This is my button group SelectionChangeFcn code :
function plotColour_SelectionChangeFcn(hObject,eventdata)
switch get(hObject,'Tag') % Get Tag of selected object.
case 'Blue'
setappdata(handles.figure1,'Colour','blue')
case 'Red'
setappdata(handles.figure1,'Colour','red')
case 'Green'
setappdata(handles.figure1,'Colour','green')
case 'Yellow'
setappdata(handles.figure1,'Colour','yellow')
case 'Black'
setappdata(handles.figure1,'Colour','black')
case 'cyan'
setappdata(handles.figure1,'Colour','cyan')
case 'Magenta'
setappdata(handles.figure1,'Colour','magenta')
otherwise
end
This is the section of code which plots the data:
global noFiles
global plotLength
dataStore = getappdata(handles.figure1 , 'dataStore');
f = getappdata(handles.figure1 , 'f');
plotColour_SelectionChangeFcn(hObject,eventdata)
colour = getappdata(handles.figure1,'Colour');
hold on
for i = 1:noFiles
plot(f(2:plotLength),dataStore(2:plotLength,i),'color',colour)
end
hold off
Before this I initialise 'Colour' to blue with:
setappdata(handles.figure1,'Colour','blue')
The figure plots so I know it is executing the line :
plotColour_SelectionChangeFcn(hObject,eventdata)
But It doesn't seem to be updating the 'Colour' value. Its almost as if none of the tags in the switch/case loop are matching, but I don't know why. I have check and doubled checked the tags for the radio buttons in the property inspector.
Any help would be really appreciated, Thanks in advance :)
Tim
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採用された回答
Sean de Wolski
2012 年 7 月 20 日
First, the keyword is the American spelling of 'color' :)
Second, you don't want to set the figure's color but rather the handle to the plots' color (whether it be a line patch or whatever.
function example_buttongroup
figure;
axes('pos',[.3 .3 .5 .5]);
hL = plot(1:10);
huib = uibuttongroup('selectionchangefcn',{@schange, hL},'pos',[.1 .1 .2 .2]);
uicontrol('style','radio','string','b','parent',huib,'units','norm','pos',[.1 .5 .4 .4]);
uicontrol('style','radio','string','r','parent',huib,'units','norm','pos',[.1 .1 .4 .4]);
function schange(src,evt,hL)
set(hL,'color',get(evt.NewValue,'string'));
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その他の回答 (1 件)
Jan
2012 年 7 月 23 日
編集済み: Jan
2012 年 7 月 23 日
If the variable handles is used, it has to be defined anywhere in the current workspace. This is not special for the SelectionChangeFcn, but a basic fact for all functions. These details are explained in the "Getting Started" chapters of the documentation.
If your function is defined as "plotColour_SelectionChangeFcn(hObject,eventdata)", you can get the figure's handles struct by:
handles = guidata(hObject);
such that my "hObj" is "hObject" here. You find more details at "doc guidata".
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