How to change fontsize of label on freehand object using drawfreehand?

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Dylan Zhu 2024-6-17

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2129426-how-to-change-fontsize-of-label-on-freehand-object-using-drawfreehand

评论： Dylan Zhu 2024-7-3

Hello! I am writing a script that makes the user draw a freehand object, then prompts them for a number, and finally attaches that number onto the produced ROI as a visible label. The currently generated label is nice but I was hoping to increase the fontsize to make it more visible on a screen. Is there a good way to do this? Thank you very much!

Below, I have included an executable sample of what I'm working with at the moment.

% Initiate drawfreehand function
Drawing = drawfreehand("Color","r", "LabelAlpha",1);
% Prompt User
prompt = "What value?\n";
Value = input(prompt);
% Set the freehand object's label
Drawing.Label = num2str(Value);

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dpb 2024-6-17

You can't Accept because I wrote it as a comment...I guess it really is the answer for this case despite the editorial comment; I'll go ahead and move it over.

Yes, I have used "TMW" as shorthand for "The Mathworks" for ages...

dpb 2024-6-17

There's no guarantee getundoc will find it, but it's the best tool out there for the purpose by far. As TMW gets more and more into this thing of building these custom objects, digging into their bowels gets harder and harder as well. It's misguided direction to pursue imo, but they're apparently totally committed down the path of making everything a "mother knows best!" solution, taking away the user's opportunity to do something other than what they've thought of and generously provided...

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Answer 1

dpb 2024-6-17

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2129426-how-to-change-fontsize-of-label-on-freehand-object-using-drawfreehand#answer_1473136

移动：dpb 2024-6-17

<drawfreehand> doesn't show that it exposes the FontSize property of the text object. Best you can do will be to save the object handle and <use Yair Altman's utility> to see if you can find it or the handle to the text object as a hidden property.

It is SO FRUSTRATING that TMW has started this thing about creating specialized graphics objects that are semi-opaque (or nearly black in some instances) instead of just creating the same effect as regular axes object so the user can make desired customizations.

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Dylan Zhu 2024-6-27

在 MATLAB Online 中打开

Yeah good point, I've put what getundoc returned below. When you say the text object handle I'm honestly not entirely sure I know what you're talking about, do you know if you see that within the structure I've pasted below?

Below is the returned structure from calling getundoc() on a freehand object drawn by drawfreehand:

                               ALimInclude: on
                           ALimIncludeMode: 'auto'
                             AlphaInternal: 1
                           ApplicationData: [1×1 struct]
                                 BackPoint: 1
                             ButtonDownEvt: [1×1 event.listener]
                           ButtonMotionEvt: [1×1 event.listener]
                            ButtonStartEvt: [1×1 event.listener]
                               ButtonUpEvt: [1×1 event.listener]
                                     CData: []
                               CLimInclude: on
                           CLimIncludeMode: 'auto'
                            CachedPosition: []
                                    Canvas: [0×0 Quadrilateral]
                              ChildrenMode: 'auto'
                            ClosedInternal: 1
                             ColorInternal: [0 0.4470 0.7410]
                       ConstrainedInternal: 1
                       ContextMenuListener: []
                                  Copyable: 1
                              CurrentPoint: [0.8059 0.8766]
                           CurrentPointIdx: []
                   DataUnitsPerScreenPixel: [8.9286e-05 1.1905e-04]
                   DefaultPropMap_Internal: [0×0 struct]
                         DeletableInternal: 1
                               Description: ''
                           DescriptionMode: 'auto'
                            DimensionNames: {'X'  'Y'  'Z'}
                        DimensionNamesMode: 'auto'
                           DragButtonUpEvt: []
                            DragConstraint: []
                             DragMotionEvt: [1×1 event.listener]
                         DraggableInternal: 1
                       DrawingAreaInternal: []
                                      Edge: [1×1 LineStrip]
                                 EdgeColor: [0 0.4470 0.7410]
                         EdgeColorInternal: 'none'
                              EdgeListener: [1×1 event.listener]
                             ErrorCallback: ''
                         ErrorCallbackMode: 'auto'
                              EscapeKeyEvt: [1×1 event.listener]
                         FaceAlphaInternal: 0.2000
                    FaceSelectableInternal: 1
                              FigureHandle: [1×1 Figure]
                        FigureModeListener: []
                                      Fill: [1×1 TriangleStrip]
                              FillListener: [1×1 event.listener]
                          FilterStartIndex: 1
                                      Font: [1×1 matlab.graphics.general.Font]
                      HandleVisibilityMode: 'auto'
                              HasNewParent: 0
                                  Internal: 0
                               KeyPressEvt: [1×1 event.listener]
                             KeyReleaseEvt: [1×1 event.listener]
                        LabelAlphaInternal: 1
                               LabelHandle: [1×1 Text]
                             LabelInternal: ''
                             LabelListener: [1×1 event.listener]
                             LabelLocation: 'firstvertex'
                     LabelLocationInternal: 'firstvertex'
                    LabelTextColorInternal: []
                LabelVisibleInsideInternal: 0
                      LabelVisibleInternal: 1
               LabelVisibleOnHoverInternal: 0
                         LineWidthInternal: 3
                        MarkerSizeInternal: 8
                            MarkersVisible: 'on'
                    MarkersVisibleInternal: 1
             MarkersVisibleOnHoverInternal: 0
                                  MouseHit: 0
                        MulticlickInternal: 0
                              NodeChildren: [8×1 Graphics]
                                NodeParent: [1×1 ClipNode]
                                 NumPoints: 0
                                ParentMode: 'manual'
                                     Point: [1×4 Marker]
                             PointListener: [1×4 event.listener]
                        PositionConstraint: [0 1 0 1]
                          PositionInternal: [28×2 double]
                    ROIIsUnderConstruction: 0
                        ReshapableInternal: 1
                            ScrollWheelEvt: []
                     SelectedColorInternal: 'none'
                          SelectedInternal: 0
                              Serializable: on
               SerializableApplicationData: [1×1 struct]
                          SerializableMode: 'auto'
                      SerializableUserData: []
                             SigmaInternal: 1
                         SkipFaceRendering: 0
                        SnapAngleIncrement: 15
                       SnapToAngleInternal: 0
                                StartPoint: [0×0 Marker]
                       StripeColorInternal: 'none'
                                StripeEdge: [1×1 LineStrip]
                                   TagMode: 'auto'
                      TransformForPrintFcn: ''
        TransformForPrintFcnImplicitInvoke: on
    TransformForPrintFcnImplicitInvokeMode: 'auto'
                  TransformForPrintFcnMode: 'auto'
                             UIContextMenu: [1×1 ContextMenu]
                     UIContextMenuInternal: [1×1 ContextMenu]
                UIPointContextMenuInternal: []
                            UserIsDragging: 0
                             UserIsDrawing: 0
                        UserLeftStartPoint: 1
                               VisibleMode: 'auto'
                         WaypointsInternal: [28×1 logical]
                               XLimInclude: on
                           XLimIncludeMode: 'auto'
                               YLimInclude: on
                           YLimIncludeMode: 'auto'
                               ZLimInclude: on
                           ZLimIncludeMode: 'auto'
                      SerializableChildren: [0×0 GraphicsPlaceholder]

dpb 2024-6-27

在 MATLAB Online 中打开

Looks like it would be

LabelHandle: [1×1 Text]

You just have to start poking at the various things getundoc returns and see what they contain...I call it "handle diving" (from the obvious other type... :J) )

Dylan Zhu 2024-7-3