How can we draw a customizable rectangular ROI on an axes using AppDesigner?

23 Ansichten (letzte 30 Tage)
Hello,
I need to draw a customizable rectangular ROI on an axes in AppDesigner:
I tried this in AppDesigner:
h = drawrectangle(app.FullImageUIAxes, 'Position', [25,25,50,50], 'LineWidth', [2], 'Color', [1 0 0]);
But I get this error: ROI parent must be a valid Axes object.
I know the axes reference is correct.
Next I tried:
h = drawrectangle(app.FullImageUIAxes, 'Parent', app.UIFigure, 'Position', [25,25,50,50], 'LineWidth', [2], 'Color', [1 0 0]);
But I get the same error.
How should the axes be referenced when using drawrectangle in AppDesigner?

Akzeptierte Antwort

Marc McLean
Marc McLean am 20 Mär. 2019
App Designer errors if the axes is produced through the App Designer GUI. However, if the axes is produced programatically, App Designer finds the axes correctly. To produce the axes programatically, for example:
app.FullImageUIAxes = axes(app.UIFigure, 'Units', 'Pixels', 'Position',[166,84,750,744], 'XTick', [], 'YTick', []);
Then you can use drawrectangle:
app.ROI = drawrectangle(app.FullImageUIAxes, 'Position', [app.ROIposition(1),app.ROIposition(2),app.ROIposition(3),app.ROIposition(4)], 'LineWidth', [1], 'Color', [1 0 0]);
You have to add listeners programatically since you cannot add them through App Designer in this case:
addlistener(app.ROI,'MovingROI', @(varargin)ROIMoving(app, app.ROI));
  4 Kommentare
Guojin Feng
Guojin Feng am 31 Okt. 2019
I see. This makes sense then. Thanks for replying on this.
Sean de Wolski
Sean de Wolski am 31 Okt. 2019
It's worth noting that this answer was true for 18b and 19a. With 19b, uiaxes is supported natively.

Melden Sie sich an, um zu kommentieren.

Weitere Antworten (1)

Sean de Wolski
Sean de Wolski am 30 Okt. 2019
In 19b, this works on a uiaxes as well.
drawrectangle(uiaxes)

Kategorien

Mehr zu Develop Apps Using App Designer finden Sie in Help Center und File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by