contents/ui/TreeItem.qml

0001 /*
0002  *  SPDX-FileCopyrightText: 2020 Marco Martin <mart@kde.org>
0003  *
0004  *  SPDX-License-Identifier: LGPL-2.0-or-later
0005  */
0006
0007 import QtQuick 2.15
0008 import QtQuick.Layouts 1.15
0009 import QtQuick.Controls 2.15 as QQC2
0010 import org.kde.kirigami 2.17 as Kirigami
0011 import org.kde.kitemmodels 1.0
0012
0013 /**
0014  * An item delegate for the TreeListView and TreeTableView components.
0015  *
0016  * It has the tree expander decoration but no content otherwise,
0017  * which has to be set as contentItem
0018  *
0019  */
0020 QQC2.ItemDelegate {
0021     id: listItem
0022
0023     property alias decoration: decoration
0024
0025     width: ListView.view.width
0026
0027     data: [
0028         TreeViewDecoration {
0029             id: decoration
0030             anchors {
0031                 left: parent.left
0032                 top:parent.top
0033                 bottom: parent.bottom
0034                 leftMargin: listItem.padding
0035             }
0036             parent: listItem
0037             parentDelegate: listItem
0038             model: listItem.ListView.view ? listItem.ListView.view.model :null
0039         }
0040     ]
0041
0042     Keys.onLeftPressed: if (kDescendantExpandable && kDescendantExpanded) {
0043         decoration.model.collapseChildren(index);
0044     } else if (!kDescendantExpandable && kDescendantLevel > 0) {
0045         if (listItem.ListView.view) {
0046             const sourceIndex = decoration.model.mapToSource(decoration.model.index(index, 0));
0047             const newIndex = decoration.model.mapFromSource(sourceIndex.parent);
0048             listItem.listItem.ListView.view.currentIndex = newIndex.row;
0049         }
0050     }
0051
0052     Keys.onRightPressed: if (kDescendantExpandable) {
0053         if (kDescendantExpanded && listItem.ListView.view) {
0054             ListView.view.incrementCurrentIndex();
0055         } else {
0056             decoration.model.expandChildren(index);
0057         }
0058     }
0059
0060     onDoubleClicked: if (kDescendantExpandable) {
0061         decoration.model.toggleChildren(index);
0062     }
0063
0064     contentItem: Kirigami.Heading {
0065         wrapMode: Text.Wrap
0066         text: listItem.text
0067         level: 5
0068         width: listItem.ListView.view.width - (decoration.width + listItem.padding * 3 + Kirigami.Units.smallSpacing)
0069     }
0070
0071     leftInset: Qt.application.layoutDirection !== Qt.RightToLeft ? decoration.width + listItem.padding * 2 : 0
0072     leftPadding: Qt.application.layoutDirection !== Qt.RightToLeft ? decoration.width + listItem.padding * 2 : 0
0073
0074     rightPadding: Qt.application.layoutDirection === Qt.RightToLeft ? decoration.width + listItem.padding * 2 : 0
0075     rightInset: Qt.application.layoutDirection === Qt.RightToLeft ? decoration.width + listItem.padding * 2 : 0
0076 }
0077