delphi - How to use TRectAnimation for a check box -


i trying modify check box animations using custom styled check mark it. known, normal check box has 4 trectanimations associated default cater combinations of ismouseover , ischecked triggers. tried no avail.

so purpose of understanding how animation works, reduced animations 1 works on ischecked trigger , inverse. following non-default settings set animation in style designer:-

duration       := 1 enabled        := true propertyname   := sourcerect  start           bottom         := 0 left           := 0 right          := 0 top            := 0  stop           bottom         := 46 left           := 0 right          := 46 top            := 0  trigger        := ischecked=true triggerinverse := ischecked=false

i facing following oddities:-

  • the check mark appears , disappears correctly when manually manipulate ischecked field of check box in object inspector when app run, check mark remains there , no activity ensues on repeated clicks (the events fired though).

  • if try manually set sourcerect fields of tsubiimage 0, never gets saved , reverts previous values.

  • the same behavior duration field of animation. reverts 1e-5 every time.

please me correctly, want mark animate , appear/disappear when check box's ischecked field changed.

edit 1 - new findings

  • turns out sourcerect field reset caused out of bounds values. doesn't give error...

  • the duration field has same error doesn't reset when set 0.2.

  • the animations inherit triggers control captured in area covered latest parent layout/panel. don't captured behind object, animation child of. checked changing triggers ismouseover , observing reactions in style designer.


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