c# - Accessing data from an Adorner -

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i'm writing 2d graphics tool in c# , wpf, , i'm using adorners on shapes drawn canvas.

i'd adorners highlight when shape considered "selected", i'm doing using mousedown , mouseup events.

however, user can select multiple shapes, not of shapes receive both of mouse events.

i have class manages drawing, holds list of selected shapes. best way give adorners access data, can see if adorned element selected?

some thing's i've considered:

  • making list global - bad idea
  • sub-classing each shape add "selected" property - require changing references shapes in class

you can make attached dependencyproperty set on shape - can set property when select one. adorner can have visibility binding property on shape visibility set automatic.

you can use tag property on shape store values - old way of doing :)


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