qt - Why doesn't a loader change its source on a state change if it has a default state specified? -

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i have qml loader, can have 2 states. depending on state, different content loaded.

loader {     id: mainloader     anchors.fill: parent      state: "state1"      states:     [         state         {             name: "state1"             propertychanges {target: mainloader; source: "page1.qml"}         },          state         {             name: "state2"             propertychanges {target: mainloader; source: "page2.qml"}         }     ] }

there 2 buttons elsewhere in application, have onclicked: mainloader.state = "state1" , onclicked: mainloader.state = "state2", respectively.

although state indeed changed (verified printing debug message in statechangescript), page 1 remains loaded @ times, page 2 never appeares.

what don't understand, following:

  • if don't assign default state (so remove state: "state1"), 2 buttons work, , both pages displayed correctly according button pressed. of course, before button pressed, loader empty.
  • if add asynchronous: true loader, 2 buttons work fine.

there several simple, not elegant solutions, example

  • just assign default source instead of default state. don't i'll have 3 states, including empty one, , need refer state of loader @ other places.
  • stick asynchronous operation.
  • use component.oncompleted: state = "state1" instead of state: "state1"

however, understand lies behind behavior. know properties not filled in order written in qml files, time press buttons, loader completed long time ago.


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