Add Material style

Change-Id: I93662a53b42858a5b65154c5ede334182e738dde
Reviewed-by: J-P Nurmi <jpnurmi@theqtcompany.com>

1 files changed, 283 insertions, 0 deletions

diff --git a/src/imports/controls/material/qquickmaterialprogressring.cpp b/src/imports/controls/material/qquickmaterialprogressring.cpp
new file mode 100644
index 00000000..1ac327ca
--- /dev/null
+++ b/src/imports/controls/material/qquickmaterialprogressring.cpp
@@ -0,0 +1,283 @@
+/****************************************************************************
+**
+** Copyright (C) 2015 The Qt Company Ltd.
+** Contact: http://www.qt.io/licensing/
+**
+** This file is part of the Qt Quick Controls module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL3$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPLv3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or later as published by the Free
+** Software Foundation and appearing in the file LICENSE.GPL included in
+** the packaging of this file. Please review the following information to
+** ensure the GNU General Public License version 2.0 requirements will be
+** met: http://www.gnu.org/licenses/gpl-2.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qquickmaterialprogressring_p.h"
+
+#include <cmath>
+
+#include <QtCore/qset.h>
+#include <QtGui/qpainter.h>
+#include <QtQuick/private/qquickitem_p.h>
+#include <QtQuick/qsgsimplerectnode.h>
+#include <QtQuick/qsgsimpletexturenode.h>
+#include <QtQuick/qquickwindow.h>
+
+QT_BEGIN_NAMESPACE
+
+/*
+    Relevant Android code:
+
+    - core/res/res/anim/progress_indeterminate_rotation_material.xml contains
+      the rotation animation data.
+    - core/res/res/anim/progress_indeterminate_material.xml contains the trim
+      animation data.
+    - core/res/res/interpolator/trim_start_interpolator.xml and
+      core/res/res/interpolator/trim_end_interpolator.xml contain the start
+      and end trim path interpolators.
+    - addCommand() in core/java/android/util/PathParser.java has a list of the
+      different path commands available.
+*/
+
+class QQuickMaterialRingAnimatorJob : public QQuickAnimatorJob
+{
+public:
+    QQuickMaterialRingAnimatorJob();
+    ~QQuickMaterialRingAnimatorJob();
+
+    void initialize(QQuickAnimatorController *controller) Q_DECL_OVERRIDE;
+    void updateCurrentTime(int time) Q_DECL_OVERRIDE;
+    void writeBack() Q_DECL_OVERRIDE;
+    void nodeWasDestroyed() Q_DECL_OVERRIDE;
+
+private:
+    QSGNode *m_itemNode;
+    QQuickWindow *m_window;
+};
+
+class QQuickMaterialRingTexture : public QSGSimpleTextureNode
+{
+public:
+    QQuickMaterialRingTexture();
+    ~QQuickMaterialRingTexture();
+
+    QColor color() const;
+    void setColor(QColor color);
+
+private:
+    QColor m_color;
+};
+
+QQuickMaterialProgressRing::QQuickMaterialProgressRing(QQuickItem *parent) :
+    QQuickItem(parent)
+{
+    setFlag(QQuickItem::ItemHasContents);
+}
+
+QQuickMaterialProgressRing::~QQuickMaterialProgressRing()
+{
+}
+
+QSGNode *QQuickMaterialProgressRing::updatePaintNode(QSGNode *oldNode, QQuickItem::UpdatePaintNodeData *)
+{
+    if (!oldNode)
+        oldNode = new QSGSimpleRectNode(boundingRect(), Qt::transparent);
+
+    static_cast<QSGSimpleRectNode *>(oldNode)->setRect(boundingRect());
+
+    QQuickMaterialRingTexture *textureNode = static_cast<QQuickMaterialRingTexture*>(oldNode->firstChild());
+    if (!textureNode) {
+        textureNode = new QQuickMaterialRingTexture;
+        textureNode->setOwnsTexture(true);
+        oldNode->appendChildNode(textureNode);
+    }
+
+    // A texture seems to be required here, but we don't have one yet, as we haven't drawn anything,
+    // so just use a blank image.
+    QImage blankImage(width(), height(), QImage::Format_ARGB32_Premultiplied);
+    blankImage.fill(Qt::transparent);
+    QPainter painter(&blankImage);
+    painter.fillRect(0, 0, width(), height(), Qt::transparent);
+    painter.end();
+    textureNode->setColor(m_color);
+    textureNode->setRect(boundingRect());
+    textureNode->setTexture(window()->createTextureFromImage(blankImage));
+
+    return oldNode;
+}
+
+QColor QQuickMaterialProgressRing::color() const
+{
+    return m_color;
+}
+
+void QQuickMaterialProgressRing::setColor(QColor color)
+{
+    if (m_color != color) {
+        m_color = color;
+        update();
+        emit colorChanged();
+    }
+}
+
+static const int spanAnimationDuration = 700;
+static const int rotationAnimationDuration = spanAnimationDuration * 6;
+static const int targetRotation = 720;
+static const int oneDegree = 16;
+static const qreal minSweepSpan = 10 * oneDegree;
+static const qreal maxSweepSpan = 300 * oneDegree;
+
+QQuickMaterialRingAnimator::QQuickMaterialRingAnimator(QObject *parent) :
+    QQuickAnimator(parent)
+{
+    setDuration(rotationAnimationDuration);
+    setLoops(QQuickAnimator::Infinite);
+}
+
+QString QQuickMaterialRingAnimator::propertyName() const
+{
+    return QString();
+}
+
+QQuickAnimatorJob *QQuickMaterialRingAnimator::createJob() const
+{
+    return new QQuickMaterialRingAnimatorJob;
+}
+
+QQuickMaterialRingAnimatorJob::QQuickMaterialRingAnimatorJob() :
+    m_itemNode(Q_NULLPTR),
+    m_window(Q_NULLPTR)
+{
+}
+
+QQuickMaterialRingAnimatorJob::~QQuickMaterialRingAnimatorJob()
+{
+}
+
+void QQuickMaterialRingAnimatorJob::initialize(QQuickAnimatorController *controller)
+{
+    QQuickAnimatorJob::initialize(controller);
+    m_itemNode = QQuickItemPrivate::get(m_target)->itemNode();
+    m_window = m_target->window();
+}
+
+void QQuickMaterialRingAnimatorJob::updateCurrentTime(int time)
+{
+    QSGNode *childContainerNode = QQuickItemPrivate::get(m_target)->childContainerNode();
+    QSGSimpleRectNode *rectNode = static_cast<QSGSimpleRectNode*>(childContainerNode->firstChild());
+    if (!rectNode)
+        return;
+
+    Q_ASSERT(rectNode->type() == QSGNode::GeometryNodeType);
+
+    const qreal width = rectNode->rect().width();
+    const qreal height = rectNode->rect().height();
+    QImage image(width, height, QImage::Format_ARGB32_Premultiplied);
+    image.fill(Qt::transparent);
+
+    QPainter painter(&image);
+    painter.setRenderHint(QPainter::Antialiasing);
+
+    QPen pen;
+    QQuickMaterialRingTexture *textureNode = static_cast<QQuickMaterialRingTexture*>(rectNode->firstChild());
+    pen.setColor(textureNode->color());
+    pen.setWidth(4);
+    painter.setPen(pen);
+
+    const qreal percentageComplete = time / qreal(rotationAnimationDuration);
+    const qreal spanPercentageComplete = (time % spanAnimationDuration) / qreal(spanAnimationDuration);
+    const int iteration = time / spanAnimationDuration;
+    int startAngle = 0;
+    int endAngle = 0;
+    static int lastStartAngle = 0;
+    static int lastEndAngle = 0;
+
+    if (iteration % 2 == 0) {
+        if (lastStartAngle > 360 * oneDegree) {
+            lastStartAngle -= 360 * oneDegree;
+        }
+
+        // The start angle is only affected by the rotation animation for the "grow" phase.
+        startAngle = lastStartAngle;
+        // TODO: use the correct curve here. QEasingCurve's bezier API doesn't support SVG path data.
+        QEasingCurve angleCurve(QEasingCurve::OutQuad);
+        const qreal percentage = angleCurve.valueForProgress(spanPercentageComplete);
+        endAngle = lastStartAngle + minSweepSpan + percentage * (maxSweepSpan - minSweepSpan);
+        lastEndAngle = endAngle;
+    } else {
+        // Both the start angle *and* the span are affected by the "shrink" phase.
+        // TODO: use the correct curve here. QEasingCurve's bezier API doesn't support SVG path data.
+        QEasingCurve angleCurve(QEasingCurve::InQuad);
+        const qreal percentage = angleCurve.valueForProgress(spanPercentageComplete);
+        startAngle = lastEndAngle - maxSweepSpan + percentage * (maxSweepSpan - minSweepSpan);
+        endAngle = lastEndAngle;
+        lastStartAngle = startAngle;
+    }
+
+    const int halfPen = pen.width() / 2;
+    const QRectF arcBounds = QRectF(rectNode->rect().adjusted(halfPen, halfPen, -halfPen, -halfPen));
+    // The current angle of the rotation animation.
+    const qreal rotation = oneDegree * percentageComplete * -targetRotation;
+    startAngle -= rotation;
+    endAngle -= rotation;
+    const int angleSpan = endAngle - startAngle;
+    painter.drawArc(arcBounds, -startAngle, -angleSpan);
+    painter.end();
+
+    textureNode->setTexture(m_window->createTextureFromImage(image));
+}
+
+void QQuickMaterialRingAnimatorJob::writeBack()
+{
+}
+
+void QQuickMaterialRingAnimatorJob::nodeWasDestroyed()
+{
+    m_itemNode = Q_NULLPTR;
+    m_window = Q_NULLPTR;
+}
+
+QQuickMaterialRingTexture::QQuickMaterialRingTexture()
+{
+}
+
+QQuickMaterialRingTexture::~QQuickMaterialRingTexture()
+{
+}
+
+QColor QQuickMaterialRingTexture::color() const
+{
+    return m_color;
+}
+
+void QQuickMaterialRingTexture::setColor(QColor color)
+{
+    m_color = color;
+}
+
+Q_DECLARE_TYPEINFO(QQuickMaterialRingAnimatorJob, Q_COMPLEX_TYPE);
+Q_DECLARE_TYPEINFO(QQuickMaterialRingTexture, Q_COMPLEX_TYPE);
+
+QT_END_NAMESPACE