Always in "move mode" in Plasma 5.18

[Zren]

After a user unlocks widgets in Plasma 5.18, the widget is permanently in "mutable mode". We'll need to check if plasmoid has the plasmoid.editMode property.

• https://phabricator.kde.org/D24265

[Zren]

Fudge, plasmoid.editMode is a containment property, aka panel.editMode, not widget.editMode. So I don't think I can access it...

• https://github.com/KDE/plasma-framework/blame/master/src/scriptengines/qml/plasmoid/containmentinterface.h#L88
• https://phabricator.kde.org/D24239
• https://phabricator.kde.org/D24239

[Zren]

Was thinking I might be able to check if plasmoid.action("edit mode") exists to detect Plasma 5.18, but that appears to be null.

https://github.com/KDE/plasma-framework/blob/master/src/plasma/corona.cpp#L375

[Zren]

I've managed to get some code that works... usually.

Item {
  id: widget

  //--- containment.editMode detector
  property var containmentInterface: null
  readonly property bool editMode: containmentInterface ? containmentInterface.editMode : false
  onParentChanged: {
    if (parent) {
      for (var obj = widget, depth = 0; !!obj; obj = obj.parent, depth++) {
        console.log('depth', depth, 'obj', obj)
        if (obj.toString().startsWith('ContainmentInterface')) {
          // desktop containment / plasmoidviewer
          // Note: This doesn't always work. FolderViewDropArea may not yet have
          //       ContainmentInterface as a parent when this loop runs.
          if (typeof obj['editMode'] === 'boolean') {
            console.log('\t', 'obj.editMode', obj.editMode, typeof obj['editMode'])
            widget.containmentInterface = obj
            break
          }
        } else if (obj.toString().startsWith('DeclarativeDropArea')) {
          // panel containment
          if (typeof obj['Plasmoid'] !== 'undefined' && obj['Plasmoid'].toString().startsWith('ContainmentInterface')) {
            if (typeof obj['Plasmoid']['editMode'] === 'boolean') {
              console.log('\t', 'obj.Plasmoid', obj.Plasmoid, typeof obj['Plasmoid']) // ContainmentInterface
              console.log('\t', 'obj.Plasmoid.editMode', obj.Plasmoid.editMode, typeof obj['Plasmoid']['editMode'])
              widget.containmentInterface = obj.Plasmoid
              break
            }
          }
        }
      }
    }
  }
  //---
}

The problem is that a desktop widget sometimes doesn't have ContainmentInterface as a parent of FolderViewDropArea. It hasn't been attached yet probably, just like how we need to wait for main.qml / widget to get attached to it's parent.

qml: depth 0 obj QQuickItem_QML_252(0x56388f22b590)
qml: depth 1 obj AppletInterface(0x56388eaa1420)
qml: depth 2 obj BasicAppletContainer_QMLTYPE_290(0x56388fbb91c0)
qml: depth 3 obj AppletsLayout(0x56388f2d06e0)
qml: depth 4 obj FolderViewDropArea_QMLTYPE_281_QML_293(0x56388f2edde0, "folder")

Though it might detect it:

qml: depth 0 obj QQuickItem_QML_252(0x55e0c3a6d6d0)
qml: depth 1 obj AppletInterface(0x55e0c3d20890)
qml: depth 2 obj BasicAppletContainer_QMLTYPE_289(0x55e0bfe34020)
qml: depth 3 obj AppletsLayout(0x55e0bef3e0c0)
qml: depth 4 obj FolderViewDropArea_QMLTYPE_292_QML_293(0x55e0bef4c7e0, "folder")
qml: depth 5 obj ContainmentInterface(0x55e0be5ac220)
qml:     obj.editMode true boolean

A panel will usually detect it though.

qml: depth 0 obj QQuickItem_QML_252(0x56389027d260)
qml: depth 1 obj AppletInterface(0x56388e9f0ca0)
qml: depth 2 obj QQuickLoader_QML_760(0x563891cfbb30)
qml: depth 3 obj QQuickGridLayout_QML_762(0x56389198e250)
qml: depth 4 obj DeclarativeDropArea_QML_758(0x56389198b770)
qml:     obj.Plasmoid ContainmentInterface(0x56388e97d9a0) object
qml:     obj.Plasmoid.editMode false boolean

[Zren]

Plasma 6 exposes the applet containement and corona objects to read/write their properties.