Public bug reported: ubuntu-ui-toolkit/staging, r2133
Description: Creating a ListItem and setting its implicitHeight has no effect. This means any component that derives from ListItem has to be implemented setting its height, while the best practice (as far as I know) is that components are supposed to set their implicit size, and leave the "real" size to the user of those components. Investigation: I spent some time on investigating this already. The problem is: - http://bazaar.launchpad.net/~ubuntu-sdk-team/ubuntu-ui-toolkit/staging/view/2133/src/UbuntuToolkit/uclistitem.cpp#L1128 This means every time the width of the parent changes, ListItem will reset its implicit height to the default value. As a consequence, specifying a custom implicit height value is not allowed, because any parent's width change would cause it to be overwritten. - http://bazaar.launchpad.net/~ubuntu-sdk-team/ubuntu-ui-toolkit/staging/view/2133/src/UbuntuToolkit/uclistitem.cpp#L1130 At this point the item has the implicitHeight set by the testcase below. Calling _q_updateSize overwrites what the user set. Testcase: import QtQuick 2.4 import Ubuntu.Components 1.3 Item { width: units.gu(42) height: units.gu(75) ListItem { id: menu Component.onCompleted: console.log(height, implicitHeight) //This is overridden on ListItem init and on every parent's width change. //It is as if it weren't there implicitHeight: 5000 //Explicitly setting height is the only way to resize the component height: 5000 Rectangle { anchors.fill: parent color: "blue" } } } ** Affects: ubuntu-ui-toolkit (Ubuntu) Importance: Undecided Assignee: Zsombor Egri (zsombi) Status: New ** Changed in: ubuntu-ui-toolkit (Ubuntu) Assignee: (unassigned) => Zsombor Egri (zsombi) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1630683 Title: ListItem: setting implicitHeight has no effect To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-ui-toolkit/+bug/1630683/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
