setappdata, where to verify?

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Roger Breton
Roger Breton 2022-2-17
评论： Voss 2022-2-17
I'm slowly progressing on my way to Matlab "nirvana"...
How would I go about checking whether an element has indeed been added to a figure object? Suppose I use this code in my script :
set(FigureH, 'Position', [1800 500 f_Largeur f_Hauteur]);
ax1 = gca;
setappdata(FigureH,'axImage', ax1);
breakpoint = 1;
Suppose I set a breakpoint right after setappdata and navigate to the Command Window and type :
>> Get(FigureH)
... to get all FigureH properties, I don't see the appdata I just created, that are supposed to be stored in the figure, according to the documentation? I was expecting, possibly, to see it in UserData[ ]?

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Voss
Voss 2022-2-17
Use
getappdata(FigureH)
to view/verify the application data associated with FigureH via setappdata().
  2 个评论
Roger Breton
Roger Breton 2022-2-17
IOW, the appdata is not stored in the figure properties per se?
Voss
Voss 2022-2-17
Ran in:
It is there, in a property called 'ApplicationData', which doesn't show up by default when you do get(FigureH).
f = figure();
setappdata(f,'test_app_data',1);
get(f) % no ApplicationData property listed
Alphamap: [0 0.0159 0.0317 0.0476 0.0635 0.0794 0.0952 0.1111 0.1270 0.1429 0.1587 0.1746 0.1905 0.2063 0.2222 0.2381 0.2540 0.2698 0.2857 0.3016 0.3175 0.3333 0.3492 0.3651 0.3810 0.3968 0.4127 0.4286 … ] BeingDeleted: off BusyAction: 'queue' ButtonDownFcn: '' Children: [0×0 GraphicsPlaceholder] Clipping: on CloseRequestFcn: 'closereq' Color: [1 1 1] Colormap: [256×3 double] ContextMenu: [0×0 GraphicsPlaceholder] CreateFcn: '' CurrentAxes: [0×0 GraphicsPlaceholder] CurrentCharacter: '' CurrentObject: [0×0 GraphicsPlaceholder] CurrentPoint: [0 0] DeleteFcn: '' DockControls: on FileName: '' GraphicsSmoothing: on HandleVisibility: 'on' Icon: '' InnerPosition: [671 661 577 433] IntegerHandle: on Interruptible: on InvertHardcopy: on KeyPressFcn: '' KeyReleaseFcn: '' MenuBar: 'none' Name: '' NextPlot: 'add' Number: 1 NumberTitle: on OuterPosition: [671 657 577 458] PaperOrientation: 'portrait' PaperPosition: [1.3359 3.3131 5.8283 4.3737] PaperPositionMode: 'auto' PaperSize: [8.5000 11] PaperType: 'usletter' PaperUnits: 'inches' Parent: [1×1 Root] Pointer: 'arrow' PointerShapeCData: [16×16 double] PointerShapeHotSpot: [1 1] Position: [671 661 577 433] Renderer: 'opengl' RendererMode: 'auto' Resize: on Scrollable: off SelectionType: 'normal' SizeChangedFcn: '' Tag: '' ToolBar: 'none' Type: 'figure' Units: 'pixels' UserData: [] Visible: off WindowButtonDownFcn: '' WindowButtonMotionFcn: '' WindowButtonUpFcn: '' WindowKeyPressFcn: '' WindowKeyReleaseFcn: '' WindowScrollWheelFcn: '' WindowState: 'normal' WindowStyle: 'normal' XDisplay: ':1.0'
get(f,'ApplicationData') % but here it is, including 'test_app_data'
ans = struct with fields:
IsDebugFigureDirty: 1 test_app_data: 1
Reference: https://www.mathworks.com/matlabcentral/answers/486152-where-does-the-getappdata-function-save-its-data#comment_757931

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