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421 lines
16 KiB
421 lines
16 KiB
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the Qt Quick Controls module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 3 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL3 included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 3 requirements
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** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 2.0 or (at your option) the GNU General
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** Public license version 3 or any later version approved by the KDE Free
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** Qt Foundation. The licenses are as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-2.0.html and
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** https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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import QtQuick 2.4
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import QtQuick.Controls 1.4
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import QtQuick.Controls.Private 1.0
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import QtQuick.Controls.Styles 1.2
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import QtQml.Models 2.2
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BasicTableView {
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id: root
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property var model: null
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property alias rootIndex: modelAdaptor.rootIndex
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readonly property var currentIndex: modelAdaptor.updateCount, modelAdaptor.mapRowToModelIndex(__currentRow)
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property ItemSelectionModel selection: null
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signal activated(var index)
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signal clicked(var index)
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signal doubleClicked(var index)
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signal pressAndHold(var index)
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signal expanded(var index)
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signal collapsed(var index)
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function isExpanded(index) {
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if (index.valid && index.model !== model) {
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console.warn("TreeView.isExpanded: model and index mismatch")
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return false
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}
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return modelAdaptor.isExpanded(index)
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}
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function collapse(index) {
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if (index.valid && index.model !== model)
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console.warn("TreeView.collapse: model and index mismatch")
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else
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modelAdaptor.collapse(index)
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}
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function expand(index) {
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if (index.valid && index.model !== model)
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console.warn("TreeView.expand: model and index mismatch")
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else
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modelAdaptor.expand(index)
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}
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function indexAt(x, y) {
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var obj = root.mapToItem(__listView.contentItem, x, y)
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return modelAdaptor.mapRowToModelIndex(__listView.indexAt(obj.x, obj.y))
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}
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style: Settings.styleComponent(Settings.style, "TreeViewStyle.qml", root)
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// Internal stuff. Do not look
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__viewTypeName: "TreeView"
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__model: TreeModelAdaptor {
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id: modelAdaptor
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model: root.model
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// Hack to force re-evaluation of the currentIndex binding
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property int updateCount: 0
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onModelReset: updateCount++
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onRowsInserted: updateCount++
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onRowsRemoved: updateCount++
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onExpanded: root.expanded(index)
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onCollapsed: root.collapsed(index)
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}
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__itemDelegateLoader: TreeViewItemDelegateLoader {
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__style: root.__style
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__itemDelegate: root.itemDelegate
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__mouseArea: mouseArea
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__treeModel: modelAdaptor
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}
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onSelectionModeChanged: if (!!selection) selection.clear()
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__mouseArea: MouseArea {
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id: mouseArea
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parent: __listView
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width: __listView.width
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height: __listView.height
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z: -1
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propagateComposedEvents: true
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focus: true
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// If there is not a touchscreen, keep the flickable from eating our mouse drags.
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// If there is a touchscreen, flicking is possible, but selection can be done only by tapping, not by dragging.
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preventStealing: !Settings.hasTouchScreen
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property var clickedIndex: undefined
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property var pressedIndex: undefined
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property bool selectOnRelease: false
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property int pressedColumn: -1
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readonly property alias currentRow: root.__currentRow
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readonly property alias currentIndex: root.currentIndex
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// Handle vertical scrolling whem dragging mouse outside boundaries
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property int autoScroll: 0 // 0 -> do nothing; 1 -> increment; 2 -> decrement
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property bool shiftPressed: false // forward shift key state to the autoscroll timer
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Timer {
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running: mouseArea.autoScroll !== 0 && __verticalScrollBar.visible
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interval: 20
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repeat: true
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onTriggered: {
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var oldPressedIndex = mouseArea.pressedIndex
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var row
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if (mouseArea.autoScroll === 1) {
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__listView.incrementCurrentIndexBlocking();
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row = __listView.indexAt(0, __listView.height + __listView.contentY)
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if (row === -1)
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row = __listView.count - 1
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} else {
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__listView.decrementCurrentIndexBlocking();
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row = __listView.indexAt(0, __listView.contentY)
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}
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var index = modelAdaptor.mapRowToModelIndex(row)
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if (index !== oldPressedIndex) {
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mouseArea.pressedIndex = index
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var modifiers = mouseArea.shiftPressed ? Qt.ShiftModifier : Qt.NoModifier
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mouseArea.mouseSelect(index, modifiers, true /* drag */)
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}
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}
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}
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function mouseSelect(modelIndex, modifiers, drag) {
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if (!selection) {
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maybeWarnAboutSelectionMode()
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return
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}
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if (selectionMode) {
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selection.setCurrentIndex(modelIndex, ItemSelectionModel.NoUpdate)
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if (selectionMode === SelectionMode.SingleSelection) {
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selection.select(modelIndex, ItemSelectionModel.ClearAndSelect)
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} else {
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var selectRowRange = (drag && (selectionMode === SelectionMode.MultiSelection
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|| (selectionMode === SelectionMode.ExtendedSelection
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&& modifiers & Qt.ControlModifier)))
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|| modifiers & Qt.ShiftModifier
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var itemSelection = !selectRowRange || clickedIndex === modelIndex ? modelIndex
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: modelAdaptor.selectionForRowRange(clickedIndex, modelIndex)
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if (selectionMode === SelectionMode.MultiSelection
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|| selectionMode === SelectionMode.ExtendedSelection && modifiers & Qt.ControlModifier) {
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if (drag)
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selection.select(itemSelection, ItemSelectionModel.ToggleCurrent)
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else
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selection.select(modelIndex, ItemSelectionModel.Toggle)
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} else if (modifiers & Qt.ShiftModifier) {
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selection.select(itemSelection, ItemSelectionModel.SelectCurrent)
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} else {
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clickedIndex = modelIndex // Needed only when drag is true
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selection.select(modelIndex, ItemSelectionModel.ClearAndSelect)
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}
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}
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}
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}
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function keySelect(keyModifiers) {
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if (selectionMode) {
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if (!keyModifiers)
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clickedIndex = currentIndex
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if (!(keyModifiers & Qt.ControlModifier))
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mouseSelect(currentIndex, keyModifiers, keyModifiers & Qt.ShiftModifier)
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}
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}
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function selected(row) {
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if (selectionMode === SelectionMode.NoSelection)
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return false
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var modelIndex = null
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if (!!selection) {
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modelIndex = modelAdaptor.mapRowToModelIndex(row)
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if (modelIndex.valid) {
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if (selectionMode === SelectionMode.SingleSelection)
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return selection.currentIndex === modelIndex
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return selection.hasSelection && selection.isSelected(modelIndex)
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} else {
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return false
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}
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}
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return row === currentRow
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&& (selectionMode === SelectionMode.SingleSelection
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|| (selectionMode > SelectionMode.SingleSelection && !selection))
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}
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function branchDecorationContains(x, y) {
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var clickedItem = __listView.itemAt(0, y + __listView.contentY)
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if (!(clickedItem && clickedItem.rowItem))
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return false
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var branchDecoration = clickedItem.rowItem.branchDecoration
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if (!branchDecoration)
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return false
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var pos = mapToItem(branchDecoration, x, y)
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return branchDecoration.contains(Qt.point(pos.x, pos.y))
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}
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function maybeWarnAboutSelectionMode() {
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if (selectionMode > SelectionMode.SingleSelection)
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console.warn("TreeView: Non-single selection is not supported without an ItemSelectionModel.")
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}
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onPressed: {
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var pressedRow = __listView.indexAt(0, mouseY + __listView.contentY)
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pressedIndex = modelAdaptor.mapRowToModelIndex(pressedRow)
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pressedColumn = __listView.columnAt(mouseX)
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selectOnRelease = false
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__listView.forceActiveFocus()
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if (pressedRow === -1
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|| Settings.hasTouchScreen
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|| branchDecorationContains(mouse.x, mouse.y)) {
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return
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}
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if (selectionMode === SelectionMode.ExtendedSelection
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&& selection.isSelected(pressedIndex)) {
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selectOnRelease = true
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return
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}
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__listView.currentIndex = pressedRow
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if (!clickedIndex)
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clickedIndex = pressedIndex
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mouseSelect(pressedIndex, mouse.modifiers, false)
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if (!mouse.modifiers)
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clickedIndex = pressedIndex
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}
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onReleased: {
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if (selectOnRelease) {
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var releasedRow = __listView.indexAt(0, mouseY + __listView.contentY)
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var releasedIndex = modelAdaptor.mapRowToModelIndex(releasedRow)
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if (releasedRow >= 0 && releasedIndex === pressedIndex)
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mouseSelect(pressedIndex, mouse.modifiers, false)
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}
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pressedIndex = undefined
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pressedColumn = -1
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autoScroll = 0
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selectOnRelease = false
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}
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onPositionChanged: {
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// NOTE: Testing for pressed is not technically needed, at least
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// until we decide to support tooltips or some other hover feature
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if (mouseY > __listView.height && pressed) {
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if (autoScroll === 1) return;
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autoScroll = 1
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} else if (mouseY < 0 && pressed) {
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if (autoScroll === 2) return;
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autoScroll = 2
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} else {
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autoScroll = 0
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}
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if (pressed && containsMouse) {
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var oldPressedIndex = pressedIndex
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var pressedRow = __listView.indexAt(0, mouseY + __listView.contentY)
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pressedIndex = modelAdaptor.mapRowToModelIndex(pressedRow)
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pressedColumn = __listView.columnAt(mouseX)
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if (pressedRow > -1 && oldPressedIndex !== pressedIndex) {
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__listView.currentIndex = pressedRow
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mouseSelect(pressedIndex, mouse.modifiers, true /* drag */)
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}
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}
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}
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onExited: {
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pressedIndex = undefined
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pressedColumn = -1
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selectOnRelease = false
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}
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onCanceled: {
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pressedIndex = undefined
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pressedColumn = -1
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autoScroll = 0
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selectOnRelease = false
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}
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onClicked: {
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var clickIndex = __listView.indexAt(0, mouseY + __listView.contentY)
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if (clickIndex > -1) {
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var modelIndex = modelAdaptor.mapRowToModelIndex(clickIndex)
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if (branchDecorationContains(mouse.x, mouse.y)) {
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if (modelAdaptor.isExpanded(modelIndex))
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modelAdaptor.collapse(modelIndex)
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else
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modelAdaptor.expand(modelIndex)
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} else {
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if (Settings.hasTouchScreen) {
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// compensate for the fact that onPressed didn't select on press: do it here instead
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pressedIndex = modelAdaptor.mapRowToModelIndex(clickIndex)
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pressedColumn = __listView.columnAt(mouseX)
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selectOnRelease = false
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__listView.forceActiveFocus()
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__listView.currentIndex = clickIndex
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if (!clickedIndex)
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clickedIndex = pressedIndex
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mouseSelect(pressedIndex, mouse.modifiers, false)
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if (!mouse.modifiers)
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clickedIndex = pressedIndex
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}
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if (root.__activateItemOnSingleClick && !mouse.modifiers)
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root.activated(modelIndex)
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}
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root.clicked(modelIndex)
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}
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}
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onDoubleClicked: {
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var clickIndex = __listView.indexAt(0, mouseY + __listView.contentY)
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if (clickIndex > -1) {
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var modelIndex = modelAdaptor.mapRowToModelIndex(clickIndex)
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if (!root.__activateItemOnSingleClick)
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root.activated(modelIndex)
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root.doubleClicked(modelIndex)
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}
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}
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onPressAndHold: {
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var pressIndex = __listView.indexAt(0, mouseY + __listView.contentY)
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if (pressIndex > -1) {
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var modelIndex = modelAdaptor.mapRowToModelIndex(pressIndex)
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root.pressAndHold(modelIndex)
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}
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}
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Keys.forwardTo: [root]
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Keys.onUpPressed: {
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event.accepted = __listView.decrementCurrentIndexBlocking()
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keySelect(event.modifiers)
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}
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Keys.onDownPressed: {
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event.accepted = __listView.incrementCurrentIndexBlocking()
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keySelect(event.modifiers)
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}
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Keys.onRightPressed: {
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if (root.currentIndex.valid)
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root.expand(currentIndex)
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else
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event.accepted = false
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}
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Keys.onLeftPressed: {
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if (root.currentIndex.valid)
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root.collapse(currentIndex)
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else
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event.accepted = false
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}
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Keys.onReturnPressed: {
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if (root.currentIndex.valid)
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root.activated(currentIndex)
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else
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event.accepted = false
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}
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Keys.onPressed: {
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__listView.scrollIfNeeded(event.key)
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if (event.key === Qt.Key_A && event.modifiers & Qt.ControlModifier
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&& !!selection && selectionMode > SelectionMode.SingleSelection) {
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var sel = modelAdaptor.selectionForRowRange(0, __listView.count - 1)
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selection.select(sel, ItemSelectionModel.SelectCurrent)
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} else if (event.key === Qt.Key_Shift) {
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shiftPressed = true
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}
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}
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Keys.onReleased: {
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if (event.key === Qt.Key_Shift)
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shiftPressed = false
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}
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}
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}
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