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qml/calamares/slideshow/Presentation.qml
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qml/calamares/slideshow/Presentation.qml
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/* === This file is part of Calamares - <https://github.com/calamares> ===
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*
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* Copyright 2017, Adriaan de Groot <groot@kde.org>
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* - added looping, keys-instead-of-shortcut
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* Copyright 2018, Adriaan de Groot <groot@kde.org>
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* - make looping a property, drop the 'c' fade-key
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* - drop navigation through entering a slide number
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* (this and the 'c' key make sense in a *presentation*
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* slideshow, not in a passive slideshow like Calamares)
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* - remove quit key
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* Copyright 2019, Adriaan de Groot <groot@kde.org>
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* - Support "V2" loading
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* - Disable shortcuts until the content is visible in Calamares
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*
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* SPDX-License-Identifier: LGPL-2.1
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* License-Filename: LICENSES/LGPLv2.1-Presentation
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*/
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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 QML Presentation System.
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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 Digia. For licensing terms and
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** conditions see http://qt.digia.com/licensing. For further information
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** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL 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 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Digia gives you certain additional
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** rights. These rights are described in the Digia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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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 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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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 2.5
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import QtQuick.Window 2.0
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Item {
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id: root
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property variant slides: []
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property int currentSlide: 0
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property bool loopSlides: true
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property bool showNotes: false;
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property bool allowDelay: true;
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property alias mouseNavigation: mouseArea.enabled
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property bool arrowNavigation: true
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property bool keyShortcutsEnabled: true
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property color titleColor: textColor;
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property color textColor: "black"
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property string fontFamily: "Helvetica"
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property string codeFontFamily: "Courier New"
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// This is set by the C++ part of Calamares when the slideshow
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// becomes visible. You can connect it to a timer, or whatever
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// else needs to start only when the slideshow becomes visible.
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//
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// It is used in this example also to keep the keyboard shortcuts
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// enabled only while the slideshow is active.
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property bool activatedInCalamares: false
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// Private API
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property int _lastShownSlide: 0
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Component.onCompleted: {
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var slideCount = 0;
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var slides = [];
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for (var i=0; i<root.children.length; ++i) {
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var r = root.children[i];
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if (r.isSlide) {
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slides.push(r);
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}
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}
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root.slides = slides;
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// Make first slide visible...
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if (root.slides.length > 0)
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root.slides[root.currentSlide].visible = true;
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}
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function switchSlides(from, to, forward) {
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from.visible = false
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to.visible = true
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return true
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}
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onCurrentSlideChanged: {
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switchSlides(root.slides[_lastShownSlide], root.slides[currentSlide], currentSlide > _lastShownSlide)
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_lastShownSlide = currentSlide
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// Always keep focus on the slideshow
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root.focus = true
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}
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function goToNextSlide() {
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if (root.slides[currentSlide].delayPoints) {
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if (root.slides[currentSlide]._advance())
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return;
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}
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if (currentSlide + 1 < root.slides.length)
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++currentSlide;
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else if (loopSlides)
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currentSlide = 0; // Loop at the end
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}
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function goToPreviousSlide() {
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if (currentSlide - 1 >= 0)
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--currentSlide;
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else if (loopSlides)
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currentSlide = root.slides.length - 1
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}
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focus: true // Keep focus
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// Navigation through key events, too
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Keys.onSpacePressed: goToNextSlide()
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Keys.onRightPressed: goToNextSlide()
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Keys.onLeftPressed: goToPreviousSlide()
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// navigate with arrow keys
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Shortcut { sequence: StandardKey.MoveToNextLine; enabled: root.activatedInCalamares && root .arrowNavigation; onActivated: goToNextSlide() }
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Shortcut { sequence: StandardKey.MoveToPreviousLine; enabled: root.activatedInCalamares && root.arrowNavigation; onActivated: goToPreviousSlide() }
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Shortcut { sequence: StandardKey.MoveToNextChar; enabled: root.activatedInCalamares && root.arrowNavigation; onActivated: goToNextSlide() }
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Shortcut { sequence: StandardKey.MoveToPreviousChar; enabled: root.activatedInCalamares && root.arrowNavigation; onActivated: goToPreviousSlide() }
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// presentation-specific single-key shortcuts (which interfere with normal typing)
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Shortcut { sequence: " "; enabled: root.activatedInCalamares && root.keyShortcutsEnabled; onActivated: goToNextSlide() }
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// standard shortcuts
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Shortcut { sequence: StandardKey.MoveToNextPage; enabled: root.activatedInCalamares; onActivated: goToNextSlide() }
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Shortcut { sequence: StandardKey.MoveToPreviousPage; enabled: root.activatedInCalamares; onActivated: goToPreviousSlide() }
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MouseArea {
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id: mouseArea
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anchors.fill: parent
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acceptedButtons: Qt.LeftButton | Qt.RightButton
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onClicked: {
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if (mouse.button == Qt.RightButton)
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goToPreviousSlide()
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else
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goToNextSlide()
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}
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onPressAndHold: goToPreviousSlide(); //A back mechanism for touch only devices
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}
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Window {
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id: notesWindow;
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width: 400
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height: 300
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title: "QML Presentation: Notes"
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visible: root.showNotes
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Flickable {
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anchors.fill: parent
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contentWidth: parent.width
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contentHeight: textContainer.height
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Item {
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id: textContainer
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width: parent.width
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height: notesText.height + 2 * notesText.padding
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Text {
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id: notesText
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property real padding: 16;
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x: padding
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y: padding
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width: parent.width - 2 * padding
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font.pixelSize: 16
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wrapMode: Text.WordWrap
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property string notes: root.slides[root.currentSlide].notes;
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onNotesChanged: {
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var result = "";
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var lines = notes.split("\n");
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var beginNewLine = false
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for (var i=0; i<lines.length; ++i) {
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var line = lines[i].trim();
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if (line.length == 0) {
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beginNewLine = true;
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} else {
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if (beginNewLine && result.length) {
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result += "\n\n"
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beginNewLine = false
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}
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if (result.length > 0)
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result += " ";
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result += line;
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}
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}
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if (result.length == 0) {
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font.italic = true;
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text = "no notes.."
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} else {
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font.italic = false;
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text = result;
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}
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}
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}
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}
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}
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}
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}
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