634 lines
24 KiB
QML
634 lines
24 KiB
QML
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/****************************************************************************
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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 2.2
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import QtQuick.Controls 1.2
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import QtQuick.Layouts 1.0
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import QtQuick.Controls.Private 1.0 as Private
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import QtQuick.Window 2.1
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/*!
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\qmltype SplitView
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\inqmlmodule QtQuick.Controls
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\since 5.1
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\ingroup views
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\ingroup controls
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\brief Lays out items with a draggable splitter between each item.
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\image splitview.png
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SplitView is a control that lays out items horizontally or
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vertically with a draggable splitter between each item.
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There will always be one (and only one) item in the SplitView that has \l{Layout::fillWidth}{Layout.fillWidth}
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set to \c true (or \l{Layout::fillHeight}{Layout.fillHeight}, if orientation is Qt.Vertical). This means that the
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item will get all leftover space when other items have been laid out.
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By default, the last visible child of the SplitView will have this set, but
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it can be changed by explicitly setting fillWidth to \c true on another item.
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As the fillWidth item will automatically be resized to fit the extra space, explicit assignments
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to its width and height properties will be ignored (but \l{Layout::minimumWidth}{Layout.minimumWidth} and
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\l{Layout::maximumWidth}{Layout.maximumWidth} will still be respected).
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The initial sizes of other items should be set via their width and height properties.
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Any binding assignment to an item's width or height will be broken as soon as the user
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drags that item's splitter handle.
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A handle can belong to the item either on the left or top side, or on the right or bottom side:
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\list
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\li If the fillWidth item is to the right: the handle belongs to the left item.
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\li if the fillWidth item is on the left: the handle belongs to the right item.
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\endlist
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This will again control which item gets resized when the user drags a handle,
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and which handle gets hidden when an item is told to hide.
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SplitView supports setting attached Layout properties on child items, which
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means that you can set the following attached properties for each child:
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\list
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\li \l{Layout::minimumWidth}{Layout.minimumWidth}
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\li \l{Layout::minimumHeight}{Layout.minimumHeight}
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\li \l{Layout::maximumWidth}{Layout.maximumWidth}
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\li \l{Layout::maximumHeight}{Layout.maximumHeight}
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\li \l{Layout::fillWidth}{Layout.fillWidth} (\c true for only one child)
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\li \l{Layout::fillHeight}{Layout.fillHeight} (\c true for only one child)
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\endlist
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\note import QtQuick.Layouts 1.0 in your QML file in order to use the Layout
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attached properties inside SplitView.
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Example:
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To create a SplitView with three items, and let the center item get superfluous space, one
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could do the following:
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\qml
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SplitView {
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anchors.fill: parent
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orientation: Qt.Horizontal
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Rectangle {
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width: 200
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Layout.maximumWidth: 400
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color: "lightblue"
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Text {
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text: "View 1"
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anchors.centerIn: parent
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}
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}
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Rectangle {
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id: centerItem
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Layout.minimumWidth: 50
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Layout.fillWidth: true
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color: "lightgray"
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Text {
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text: "View 2"
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anchors.centerIn: parent
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}
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}
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Rectangle {
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width: 200
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color: "lightgreen"
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Text {
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text: "View 3"
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anchors.centerIn: parent
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}
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}
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}
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\endqml
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*/
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Item {
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id: root
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/*!
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\qmlproperty enumeration SplitView::orientation
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This property holds the orientation of the SplitView.
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The value can be either \c Qt.Horizontal or \c Qt.Vertical.
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The default value is \c Qt.Horizontal.
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*/
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property int orientation: Qt.Horizontal
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/*!
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This property holds the delegate that will be instantiated between each
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child item. Inside the delegate the following properties are available:
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\table
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\row \li readonly property bool styleData.index \li Specifies the index of the splitter handle. The handle
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between the first and the second item will get index 0,
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the next handle index 1 etc.
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\row \li readonly property bool styleData.hovered \li The handle is being hovered.
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\row \li readonly property bool styleData.pressed \li The handle is being pressed.
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\row \li readonly property bool styleData.resizing \li The handle is being dragged.
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\endtable
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*/
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property Component handleDelegate: Rectangle {
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width: 1
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height: 1
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color: Qt.darker(pal.window, 1.5)
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}
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/*!
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This propery is \c true when the user is resizing any of the items by
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dragging on the splitter handles.
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*/
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property bool resizing: false
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/*! \internal */
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default property alias __contents: contents.data
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/*! \internal */
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property alias __items: splitterItems.children
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/*! \internal */
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property alias __handles: splitterHandles.children
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clip: true
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Component.onCompleted: d.init()
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onWidthChanged: d.updateLayout()
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onHeightChanged: d.updateLayout()
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onOrientationChanged: d.changeOrientation()
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/*! \qmlmethod void SplitView::addItem(Item item)
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Add an item to the end of the view.
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\since QtQuick.Controls 1.3 */
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function addItem(item) {
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d.updateLayoutGuard = true
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d.addItem_impl(item)
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d.calculateImplicitSize()
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d.updateLayoutGuard = false
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d.updateFillIndex()
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}
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/*! \qmlmethod void SplitView::removeItem(Item item)
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Remove \a item from the view.
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\since QtQuick.Controls 1.4 */
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function removeItem(item) {
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d.updateLayoutGuard = true
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var result = d.removeItem_impl(item)
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if (result !== null) {
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d.calculateImplicitSize()
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d.updateLayoutGuard = false
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d.updateFillIndex()
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}
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else {
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d.updateLayoutGuard = false
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}
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}
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SystemPalette { id: pal }
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QtObject {
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id: d
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readonly property string leftMargin: horizontal ? "leftMargin" : "topMargin"
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readonly property string topMargin: horizontal ? "topMargin" : "leftMargin"
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readonly property string rightMargin: horizontal ? "rightMargin" : "bottomMargin"
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property bool horizontal: orientation == Qt.Horizontal
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readonly property string minimum: horizontal ? "minimumWidth" : "minimumHeight"
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readonly property string maximum: horizontal ? "maximumWidth" : "maximumHeight"
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readonly property string otherMinimum: horizontal ? "minimumHeight" : "minimumWidth"
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readonly property string otherMaximum: horizontal ? "maximumHeight" : "maximumWidth"
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readonly property string offset: horizontal ? "x" : "y"
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readonly property string otherOffset: horizontal ? "y" : "x"
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readonly property string size: horizontal ? "width" : "height"
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readonly property string otherSize: horizontal ? "height" : "width"
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readonly property string implicitSize: horizontal ? "implicitWidth" : "implicitHeight"
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readonly property string implicitOtherSize: horizontal ? "implicitHeight" : "implicitWidth"
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property int fillIndex: -1
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property bool updateLayoutGuard: true
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function extraMarginSize(item, other) {
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if (typeof(other) === 'undefined')
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other = false;
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if (other === horizontal)
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// vertical
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return item.Layout.topMargin + item.Layout.bottomMargin
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return item.Layout.leftMargin + item.Layout.rightMargin
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}
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function addItem_impl(item)
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{
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// temporarily set fillIndex to new item
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fillIndex = __items.length
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if (splitterItems.children.length > 0)
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handleLoader.createObject(splitterHandles, {"__handleIndex":splitterItems.children.length - 1})
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item.parent = splitterItems
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d.initItemConnections(item)
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}
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function initItemConnections(item)
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{
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// should match disconnections in terminateItemConnections
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item.widthChanged.connect(d.updateLayout)
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item.heightChanged.connect(d.updateLayout)
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item.Layout.maximumWidthChanged.connect(d.updateLayout)
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item.Layout.minimumWidthChanged.connect(d.updateLayout)
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item.Layout.maximumHeightChanged.connect(d.updateLayout)
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item.Layout.minimumHeightChanged.connect(d.updateLayout)
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item.Layout.leftMarginChanged.connect(d.updateLayout)
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item.Layout.topMarginChanged.connect(d.updateLayout)
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item.Layout.rightMarginChanged.connect(d.updateLayout)
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item.Layout.bottomMarginChanged.connect(d.updateLayout)
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item.visibleChanged.connect(d.updateFillIndex)
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item.Layout.fillWidthChanged.connect(d.updateFillIndex)
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item.Layout.fillHeightChanged.connect(d.updateFillIndex)
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}
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function terminateItemConnections(item)
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{
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// should match connections in initItemConnections
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item.widthChanged.disconnect(d.updateLayout)
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item.heightChanged.disconnect(d.updateLayout)
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item.Layout.maximumWidthChanged.disconnect(d.updateLayout)
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item.Layout.minimumWidthChanged.disconnect(d.updateLayout)
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item.Layout.maximumHeightChanged.disconnect(d.updateLayout)
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item.Layout.minimumHeightChanged.disconnect(d.updateLayout)
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item.visibleChanged.disconnect(d.updateFillIndex)
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item.Layout.fillWidthChanged.disconnect(d.updateFillIndex)
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item.Layout.fillHeightChanged.disconnect(d.updateFillIndex)
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}
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function removeItem_impl(item)
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{
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var pos = itemPos(item)
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// Check pos range
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if (pos < 0 || pos >= __items.length)
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return null
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// Temporary unset the fillIndex
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fillIndex = __items.length - 1
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// Remove the handle at the left/right of the item that
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// is going to be removed
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var handlePos = -1
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var hasPrevious = pos > 0
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var hasNext = (pos + 1) < __items.length
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if (hasPrevious)
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handlePos = pos-1
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else if (hasNext)
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handlePos = pos
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if (handlePos >= 0) {
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var handle = __handles[handlePos]
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handle.visible = false
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handle.parent = null
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handle.destroy()
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for (var i = handlePos; i < __handles.length; ++i)
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__handles[i].__handleIndex = i
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}
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// Remove the item.
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// Disconnect the item to be removed
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terminateItemConnections(item)
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item.parent = null
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return item
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}
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function itemPos(item)
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{
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for (var i = 0; i < __items.length; ++i)
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if (item === __items[i])
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return i
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return -1
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}
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function init()
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{
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for (var i=0; i<__contents.length; ++i) {
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var item = __contents[i];
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if (!item.hasOwnProperty("x"))
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continue
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addItem_impl(item)
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i-- // item was removed from list
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}
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d.calculateImplicitSize()
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d.updateLayoutGuard = false
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d.updateFillIndex()
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}
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function updateFillIndex()
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{
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if (lastItem.visible !== root.visible)
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return
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var policy = (root.orientation === Qt.Horizontal) ? "fillWidth" : "fillHeight"
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for (var i=0; i<__items.length-1; ++i) {
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if (__items[i].Layout[policy] === true)
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break;
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}
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d.fillIndex = i
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d.updateLayout()
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}
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function changeOrientation()
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{
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if (__items.length == 0)
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return;
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d.updateLayoutGuard = true
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// Swap width/height for items and handles:
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for (var i=0; i<__items.length; ++i) {
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var item = __items[i]
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var tmp = item.x
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item.x = item.y
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item.y = tmp
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tmp = item.width
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item.width = item.height
|
||
|
|
item.height = tmp
|
||
|
|
|
||
|
|
var handle = __handles[i]
|
||
|
|
if (handle) {
|
||
|
|
tmp = handle.x
|
||
|
|
handle.x = handle.y
|
||
|
|
handle.y = handle.x
|
||
|
|
tmp = handle.width
|
||
|
|
handle.width = handle.height
|
||
|
|
handle.height = tmp
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Change d.horizontal explicit, since the binding will change too late:
|
||
|
|
d.horizontal = orientation == Qt.Horizontal
|
||
|
|
d.updateLayoutGuard = false
|
||
|
|
d.updateFillIndex()
|
||
|
|
}
|
||
|
|
|
||
|
|
function calculateImplicitSize()
|
||
|
|
{
|
||
|
|
var implicitSize = 0
|
||
|
|
var implicitOtherSize = 0
|
||
|
|
|
||
|
|
for (var i=0; i<__items.length; ++i) {
|
||
|
|
var item = __items[i];
|
||
|
|
implicitSize += clampedMinMax(item[d.size], item.Layout[minimum], item.Layout[maximum]) + extraMarginSize(item)
|
||
|
|
var os = clampedMinMax(item[otherSize], item.Layout[otherMinimum], item.Layout[otherMaximum]) + extraMarginSize(item, true)
|
||
|
|
implicitOtherSize = Math.max(implicitOtherSize, os)
|
||
|
|
|
||
|
|
var handle = __handles[i]
|
||
|
|
if (handle)
|
||
|
|
implicitSize += handle[d.size] //### Can handles have margins??
|
||
|
|
}
|
||
|
|
|
||
|
|
root[d.implicitSize] = implicitSize
|
||
|
|
root[d.implicitOtherSize] = implicitOtherSize
|
||
|
|
}
|
||
|
|
|
||
|
|
function clampedMinMax(value, minimum, maximum)
|
||
|
|
{
|
||
|
|
if (value < minimum)
|
||
|
|
value = minimum
|
||
|
|
if (value > maximum)
|
||
|
|
value = maximum
|
||
|
|
return value
|
||
|
|
}
|
||
|
|
|
||
|
|
function accumulatedSize(firstIndex, lastIndex, includeFillItemMinimum)
|
||
|
|
{
|
||
|
|
// Go through items and handles, and
|
||
|
|
// calculate their accummulated width.
|
||
|
|
var w = 0
|
||
|
|
for (var i=firstIndex; i<lastIndex; ++i) {
|
||
|
|
|
||
|
|
var item = __items[i]
|
||
|
|
if (item.visible || i == d.fillIndex) {
|
||
|
|
if (i !== d.fillIndex)
|
||
|
|
w += item[d.size] + extraMarginSize(item)
|
||
|
|
else if (includeFillItemMinimum && item.Layout[minimum] !== undefined)
|
||
|
|
w += item.Layout[minimum] + extraMarginSize(item)
|
||
|
|
}
|
||
|
|
|
||
|
|
var handle = __handles[i]
|
||
|
|
if (handle && handle.visible)
|
||
|
|
w += handle[d.size]
|
||
|
|
}
|
||
|
|
return w
|
||
|
|
}
|
||
|
|
|
||
|
|
function updateLayout()
|
||
|
|
{
|
||
|
|
// This function will reposition both handles and
|
||
|
|
// items according to the their width/height:
|
||
|
|
if (__items.length === 0)
|
||
|
|
return;
|
||
|
|
if (!lastItem.visible)
|
||
|
|
return;
|
||
|
|
if (d.updateLayoutGuard === true)
|
||
|
|
return
|
||
|
|
d.updateLayoutGuard = true
|
||
|
|
|
||
|
|
// Ensure all items within their min/max:
|
||
|
|
for (var i=0; i<__items.length; ++i) {
|
||
|
|
if (i !== d.fillIndex) {
|
||
|
|
var item = __items[i];
|
||
|
|
var clampedSize = clampedMinMax(item[d.size], item.Layout[d.minimum], item.Layout[d.maximum])
|
||
|
|
if (clampedSize != item[d.size])
|
||
|
|
item[d.size] = clampedSize
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Set size of fillItem to remaining available space.
|
||
|
|
// Special case: If SplitView size is zero, we leave fillItem with the size
|
||
|
|
// it already got, and assume that SplitView ends up with implicit size as size:
|
||
|
|
if (root[d.size] != 0) {
|
||
|
|
var fillItem = __items[fillIndex]
|
||
|
|
var superfluous = root[d.size] - d.accumulatedSize(0, __items.length, false)
|
||
|
|
fillItem[d.size] = clampedMinMax(superfluous - extraMarginSize(fillItem), fillItem.Layout[minimum], fillItem.Layout[maximum]);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Position items and handles according to their width:
|
||
|
|
var lastVisibleItem, lastVisibleHandle, handle
|
||
|
|
var pos = 0;
|
||
|
|
for (i=0; i<__items.length; ++i) {
|
||
|
|
// Position item to the right of the previous visible handle:
|
||
|
|
item = __items[i];
|
||
|
|
if (item.visible || i == d.fillIndex) {
|
||
|
|
pos += item.Layout[leftMargin]
|
||
|
|
item[d.offset] = pos
|
||
|
|
item[d.otherOffset] = item.Layout[topMargin]
|
||
|
|
item[d.otherSize] = clampedMinMax(root[otherSize], item.Layout[otherMinimum], item.Layout[otherMaximum]) - extraMarginSize(item, true)
|
||
|
|
lastVisibleItem = item
|
||
|
|
pos += Math.max(0, item[d.size]) + item.Layout[rightMargin]
|
||
|
|
}
|
||
|
|
|
||
|
|
handle = __handles[i]
|
||
|
|
if (handle && handle.visible) {
|
||
|
|
handle[d.offset] = pos
|
||
|
|
handle[d.otherOffset] = 0 //### can handles have margins?
|
||
|
|
handle[d.otherSize] = root[d.otherSize]
|
||
|
|
lastVisibleHandle = handle
|
||
|
|
pos += handle[d.size]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
d.updateLayoutGuard = false
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
Component {
|
||
|
|
id: handleLoader
|
||
|
|
Loader {
|
||
|
|
id: itemHandle
|
||
|
|
|
||
|
|
property int __handleIndex: -1
|
||
|
|
property QtObject styleData: QtObject {
|
||
|
|
readonly property int index: __handleIndex
|
||
|
|
readonly property alias hovered: mouseArea.containsMouse
|
||
|
|
readonly property alias pressed: mouseArea.pressed
|
||
|
|
readonly property bool resizing: mouseArea.drag.active
|
||
|
|
onResizingChanged: root.resizing = resizing
|
||
|
|
}
|
||
|
|
property bool resizeLeftItem: (d.fillIndex > __handleIndex)
|
||
|
|
visible: __items[__handleIndex + (resizeLeftItem ? 0 : 1)].visible
|
||
|
|
sourceComponent: handleDelegate
|
||
|
|
onWidthChanged: d.updateLayout()
|
||
|
|
onHeightChanged: d.updateLayout()
|
||
|
|
onXChanged: moveHandle()
|
||
|
|
onYChanged: moveHandle()
|
||
|
|
|
||
|
|
MouseArea {
|
||
|
|
id: mouseArea
|
||
|
|
anchors.fill: parent
|
||
|
|
property real defaultMargin: Private.Settings.hasTouchScreen ? Screen.pixelDensity * 3.5 : 2
|
||
|
|
anchors.leftMargin: (parent.width <= 1) ? -defaultMargin : 0
|
||
|
|
anchors.rightMargin: (parent.width <= 1) ? -defaultMargin : 0
|
||
|
|
anchors.topMargin: (parent.height <= 1) ? -defaultMargin : 0
|
||
|
|
anchors.bottomMargin: (parent.height <= 1) ? -defaultMargin : 0
|
||
|
|
hoverEnabled: Private.Settings.hoverEnabled
|
||
|
|
drag.threshold: 0
|
||
|
|
drag.target: parent
|
||
|
|
drag.axis: root.orientation === Qt.Horizontal ? Drag.XAxis : Drag.YAxis
|
||
|
|
cursorShape: root.orientation === Qt.Horizontal ? Qt.SplitHCursor : Qt.SplitVCursor
|
||
|
|
}
|
||
|
|
|
||
|
|
function moveHandle() {
|
||
|
|
// Moving the handle means resizing an item. Which one,
|
||
|
|
// left or right, depends on where the fillItem is.
|
||
|
|
// 'updateLayout' will be overridden in case new width violates max/min.
|
||
|
|
// 'updateLayout' will be triggered when an item changes width.
|
||
|
|
if (d.updateLayoutGuard)
|
||
|
|
return
|
||
|
|
|
||
|
|
var leftHandle, leftItem, rightItem, rightHandle
|
||
|
|
var leftEdge, rightEdge, newWidth, leftStopX, rightStopX
|
||
|
|
var i
|
||
|
|
|
||
|
|
if (resizeLeftItem) {
|
||
|
|
// Ensure that the handle is not crossing other handles. So
|
||
|
|
// find the first visible handle to the left to determine the left edge:
|
||
|
|
leftEdge = 0
|
||
|
|
for (i=__handleIndex-1; i>=0; --i) {
|
||
|
|
leftHandle = __handles[i]
|
||
|
|
if (leftHandle.visible) {
|
||
|
|
leftEdge = leftHandle[d.offset] + leftHandle[d.size]
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Ensure: leftStopX >= itemHandle[d.offset] >= rightStopX
|
||
|
|
var min = d.accumulatedSize(__handleIndex+1, __items.length, true)
|
||
|
|
rightStopX = root[d.size] - min - itemHandle[d.size]
|
||
|
|
leftStopX = Math.max(leftEdge, itemHandle[d.offset])
|
||
|
|
itemHandle[d.offset] = Math.min(rightStopX, Math.max(leftStopX, itemHandle[d.offset]))
|
||
|
|
|
||
|
|
newWidth = itemHandle[d.offset] - leftEdge
|
||
|
|
leftItem = __items[__handleIndex]
|
||
|
|
// The next line will trigger 'updateLayout':
|
||
|
|
leftItem[d.size] = newWidth
|
||
|
|
} else {
|
||
|
|
// Resize item to the right.
|
||
|
|
// Ensure that the handle is not crossing other handles. So
|
||
|
|
// find the first visible handle to the right to determine the right edge:
|
||
|
|
rightEdge = root[d.size]
|
||
|
|
for (i=__handleIndex+1; i<__handles.length; ++i) {
|
||
|
|
rightHandle = __handles[i]
|
||
|
|
if (rightHandle.visible) {
|
||
|
|
rightEdge = rightHandle[d.offset]
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Ensure: leftStopX <= itemHandle[d.offset] <= rightStopX
|
||
|
|
min = d.accumulatedSize(0, __handleIndex+1, true)
|
||
|
|
leftStopX = min - itemHandle[d.size]
|
||
|
|
rightStopX = Math.min((rightEdge - itemHandle[d.size]), itemHandle[d.offset])
|
||
|
|
itemHandle[d.offset] = Math.max(leftStopX, Math.min(itemHandle[d.offset], rightStopX))
|
||
|
|
|
||
|
|
newWidth = rightEdge - (itemHandle[d.offset] + itemHandle[d.size])
|
||
|
|
rightItem = __items[__handleIndex+1]
|
||
|
|
// The next line will trigger 'updateLayout':
|
||
|
|
rightItem[d.size] = newWidth
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
Item {
|
||
|
|
id: contents
|
||
|
|
visible: false
|
||
|
|
anchors.fill: parent
|
||
|
|
}
|
||
|
|
Item {
|
||
|
|
id: splitterItems
|
||
|
|
anchors.fill: parent
|
||
|
|
}
|
||
|
|
Item {
|
||
|
|
id: splitterHandles
|
||
|
|
anchors.fill: parent
|
||
|
|
}
|
||
|
|
|
||
|
|
Item {
|
||
|
|
id: lastItem
|
||
|
|
onVisibleChanged: d.updateFillIndex()
|
||
|
|
}
|
||
|
|
|
||
|
|
Component.onDestruction: {
|
||
|
|
for (var i=0; i<splitterItems.children.length; ++i) {
|
||
|
|
var item = splitterItems.children[i];
|
||
|
|
d.terminateItemConnections(item)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|