(App Designer) Callback for an ROI event does not work
조회 수: 8 (최근 30일)
이전 댓글 표시
I have spent a lot of time trying to figure this out, so now is time to ask for help -
In App Designer, I have been trying to set up a callback triggered by changing a position of an ROI line in a (standard, not UI) axes object
function startupFcn(app)
app.ax = axes(app.Panel, 'Title', [], 'XLabel', [], 'YLabel', [], 'Color', 'none','YColor', 'none', 'Xlim', [0 1.5], 'YTick', [], 'XTick', [0 0.5 1 1.5], 'TickDir', 'both', 'TickLength', [0.03 0.035], 'XMinorTick', 'on', 'Units', 'pixels','Position', [8 30 284 0]);
disableDefaultInteractivity(app.ax);
app.ax.Toolbar.Visible = 'off';
app.line1 = drawline(app.ax,'Position',[app.RMP_t1 0; app.RMP_t2 0]);
addlistener(app.line1, 'Position', 'ROIMoved', @line1Moved);
drawnow;
app.UIFigure.WindowState = 'maximized';
end
However, I get the following error:
Error using images.roi.Line/addlistener
Event 'ROIMoved' is not defined for class 'images.roi.Line'.
According to the documentation on images.roi.Line class, this should be a valid event name. By the way, when I remove the 'Position' argument, the app runs without errors but the callback (@line1Moved) doesn't do anything.
댓글 수: 1
Jyotsna Talluri
2019년 8월 22일
The error is due to 'Position' argument and its not due to 'ROIMoved' as addlistener creates listener for given event triggered by callback function on the object.It cannot take 'Position' as argument.
If your function 'line1Moved' is correct then that should work fine.Can your provide your 'line1Moved' function so that I can check
채택된 답변
Marek Svoboda
2019년 8월 22일
댓글 수: 2
Jyotsna Talluri
2019년 8월 25일
That implies 'varargin' is argument to the function handle,which means it takes any number of inputs.The function 'l1Moving' can be called with any numer of input arguments
추가 답변 (0개)
참고 항목
카테고리
Help Center 및 File Exchange에서 Migrate GUIDE Apps에 대해 자세히 알아보기
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!