Remember the last focused TextEdit and insert text inside it on clicking a button.

foobarbaz

Dear Qt

Suppose I have several TextInput fields and a button. Clicking the button should insert some text (let say "foo") inside the text field that had the focus right before clicking the button. I was thinking of the two following approaches:

Approach #1

We have a property var lastFocusedText which is intended to store the last focused text field
Once the user changes the focus of a text field the lastFocusedText is updated
On clicking we check if lastFocusedText is valid and if so do text = "boo"

This is a sketch of what I mean :

Item {
  id: root

  TextInput {
    id: textA

    onActiveFocusChanged : {
      if(activeFocus === true) {
        root.lastFocusedText = textA
      }
      else {
        root.lastFocusedText = null
      }
    }
  }

  TextInput {
    id: textB

    onActiveFocusChanged : {
      if(activeFocus === true) {
        root.lastFocusedText = textB
      }
      else {
        root.lastFocusedText = null
      }
    }
  }

  Button {
    focusPolicy: Qt.NoFocus
    onClicked : {
      if(root.lastFocusedText instanseof TextInput) {
        root.lastFocusedText.text = "Foo"
      }
    }
  }
}

Approach #2

This one is more simple :

Every text field is subscribed to a signal and if it has active focus changes its text:

Item {
  id: root

  TextInput {
    id: textA

    Connections {
      target: booButton
      function onClicked() {
        if(textA.activeFocus === true) {
          textA.text = "Foo"
        }
      }
    }
  }

  TextInput {
    id: textB

    Connections {
      target: booButton
      function onClicked() {
        if(textB.activeFocus === true) {
          textB.text = "Foo"
        }
      }
    }
  }

  Button {
    id: booButton
    focusPolicy: Qt.NoFocus
  }
}

I like second approach more. But what do you think ?

GrecKo

Another alternative would be to use the Window.activeFocusItem attached property. On button click, check if it's one one your TextInput ( item.parent === root && item.instanceof TextInput) and set its text.

Reading the code I prefer to have an onClicked in the Button, to keep the cause and effects close together.

foobarbaz

@GrecKo Thank you ! Indeed I can use that property :)