Move qt-ui to desktop-widgets

Since we have now destkop and mobile versions, 'qt-ui' was a very
poor name choice for a folder that contains only destkop-enabled
widgets.

Also, move the graphicsview-common.h/cpp to subsurface-core because
it doesn't depend on qgraphicsview, it merely implements all the
colors that we use throughout Subsurface, and we will use colors on both
desktop and mobile versions

Same thing applies for metrics.h/cpp

Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 480 insertions, 0 deletions

diff --git a/desktop-widgets/kmessagewidget.cpp b/desktop-widgets/kmessagewidget.cpp
new file mode 100644
index 000000000..2e506af2d
--- /dev/null
+++ b/desktop-widgets/kmessagewidget.cpp
@@ -0,0 +1,480 @@
+/* This file is part of the KDE libraries
+ *
+ * Copyright (c) 2011 Aurélien Gâteau <agateau@kde.org>
+ * Copyright (c) 2014 Dominik Haumann <dhaumann@kde.org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301  USA
+ */
+#include "kmessagewidget.h"
+
+#include <QAction>
+#include <QEvent>
+#include <QGridLayout>
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QPainter>
+#include <QShowEvent>
+#include <QTimeLine>
+#include <QToolButton>
+#include <QStyle>
+
+//---------------------------------------------------------------------
+// KMessageWidgetPrivate
+//---------------------------------------------------------------------
+class KMessageWidgetPrivate
+{
+public:
+    void init(KMessageWidget *);
+
+    KMessageWidget *q;
+    QFrame *content;
+    QLabel *iconLabel;
+    QLabel *textLabel;
+    QToolButton *closeButton;
+    QTimeLine *timeLine;
+    QIcon icon;
+
+    KMessageWidget::MessageType messageType;
+    bool wordWrap;
+    QList<QToolButton *> buttons;
+    QPixmap contentSnapShot;
+
+    void createLayout();
+    void updateSnapShot();
+    void updateLayout();
+    void slotTimeLineChanged(qreal);
+    void slotTimeLineFinished();
+
+    int bestContentHeight() const;
+};
+
+void KMessageWidgetPrivate::init(KMessageWidget *q_ptr)
+{
+    q = q_ptr;
+
+    q->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Fixed);
+
+    timeLine = new QTimeLine(500, q);
+    QObject::connect(timeLine, SIGNAL(valueChanged(qreal)), q, SLOT(slotTimeLineChanged(qreal)));
+    QObject::connect(timeLine, SIGNAL(finished()), q, SLOT(slotTimeLineFinished()));
+
+    content = new QFrame(q);
+    content->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
+
+    wordWrap = false;
+
+    iconLabel = new QLabel(content);
+    iconLabel->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    iconLabel->hide();
+
+    textLabel = new QLabel(content);
+    textLabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
+    textLabel->setTextInteractionFlags(Qt::TextBrowserInteraction);
+    QObject::connect(textLabel, SIGNAL(linkActivated(QString)), q, SIGNAL(linkActivated(QString)));
+    QObject::connect(textLabel, SIGNAL(linkHovered(QString)), q, SIGNAL(linkHovered(QString)));
+
+    QAction *closeAction = new QAction(q);
+    closeAction->setText(KMessageWidget::tr("&Close"));
+    closeAction->setToolTip(KMessageWidget::tr("Close message"));
+    closeAction->setIcon(q->style()->standardIcon(QStyle::SP_DialogCloseButton));
+
+    QObject::connect(closeAction, SIGNAL(triggered(bool)), q, SLOT(animatedHide()));
+
+    closeButton = new QToolButton(content);
+    closeButton->setAutoRaise(true);
+    closeButton->setDefaultAction(closeAction);
+
+    q->setMessageType(KMessageWidget::Information);
+}
+
+void KMessageWidgetPrivate::createLayout()
+{
+    delete content->layout();
+
+    content->resize(q->size());
+
+    qDeleteAll(buttons);
+    buttons.clear();
+
+    Q_FOREACH (QAction *action, q->actions()) {
+        QToolButton *button = new QToolButton(content);
+        button->setDefaultAction(action);
+        button->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
+        buttons.append(button);
+    }
+
+    // AutoRaise reduces visual clutter, but we don't want to turn it on if
+    // there are other buttons, otherwise the close button will look different
+    // from the others.
+    closeButton->setAutoRaise(buttons.isEmpty());
+
+    if (wordWrap) {
+        QGridLayout *layout = new QGridLayout(content);
+        // Set alignment to make sure icon does not move down if text wraps
+        layout->addWidget(iconLabel, 0, 0, 1, 1, Qt::AlignHCenter | Qt::AlignTop);
+        layout->addWidget(textLabel, 0, 1);
+
+        QHBoxLayout *buttonLayout = new QHBoxLayout;
+        buttonLayout->addStretch();
+        Q_FOREACH (QToolButton *button, buttons) {
+            // For some reason, calling show() is necessary if wordwrap is true,
+            // otherwise the buttons do not show up. It is not needed if
+            // wordwrap is false.
+            button->show();
+            buttonLayout->addWidget(button);
+        }
+        buttonLayout->addWidget(closeButton);
+        layout->addItem(buttonLayout, 1, 0, 1, 2);
+    } else {
+        QHBoxLayout *layout = new QHBoxLayout(content);
+        layout->addWidget(iconLabel);
+        layout->addWidget(textLabel);
+
+        Q_FOREACH (QToolButton *button, buttons) {
+            layout->addWidget(button);
+        }
+
+        layout->addWidget(closeButton);
+    };
+
+    if (q->isVisible()) {
+        q->setFixedHeight(content->sizeHint().height());
+    }
+    q->updateGeometry();
+}
+
+void KMessageWidgetPrivate::updateLayout()
+{
+    if (content->layout()) {
+        createLayout();
+    }
+}
+
+void KMessageWidgetPrivate::updateSnapShot()
+{
+    // Attention: updateSnapShot calls QWidget::render(), which causes the whole
+    // window layouts to be activated. Calling this method from resizeEvent()
+    // can lead to infinite recursion, see:
+    // https://bugs.kde.org/show_bug.cgi?id=311336
+    contentSnapShot = QPixmap(content->size() * q->devicePixelRatio());
+    contentSnapShot.setDevicePixelRatio(q->devicePixelRatio());
+    contentSnapShot.fill(Qt::transparent);
+    content->render(&contentSnapShot, QPoint(), QRegion(), QWidget::DrawChildren);
+}
+
+void KMessageWidgetPrivate::slotTimeLineChanged(qreal value)
+{
+    q->setFixedHeight(qMin(value * 2, qreal(1.0)) * content->height());
+    q->update();
+}
+
+void KMessageWidgetPrivate::slotTimeLineFinished()
+{
+    if (timeLine->direction() == QTimeLine::Forward) {
+        // Show
+        // We set the whole geometry here, because it may be wrong if a
+        // KMessageWidget is shown right when the toplevel window is created.
+        content->setGeometry(0, 0, q->width(), bestContentHeight());
+
+        // notify about finished animation
+        emit q->showAnimationFinished();
+    } else {
+        // hide and notify about finished animation
+        q->hide();
+        emit q->hideAnimationFinished();
+    }
+}
+
+int KMessageWidgetPrivate::bestContentHeight() const
+{
+    int height = content->heightForWidth(q->width());
+    if (height == -1) {
+        height = content->sizeHint().height();
+    }
+    return height;
+}
+
+//---------------------------------------------------------------------
+// KMessageWidget
+//---------------------------------------------------------------------
+KMessageWidget::KMessageWidget(QWidget *parent)
+    : QFrame(parent)
+    , d(new KMessageWidgetPrivate)
+{
+    d->init(this);
+}
+
+KMessageWidget::KMessageWidget(const QString &text, QWidget *parent)
+    : QFrame(parent)
+    , d(new KMessageWidgetPrivate)
+{
+    d->init(this);
+    setText(text);
+}
+
+KMessageWidget::~KMessageWidget()
+{
+    delete d;
+}
+
+QString KMessageWidget::text() const
+{
+    return d->textLabel->text();
+}
+
+void KMessageWidget::setText(const QString &text)
+{
+    d->textLabel->setText(text);
+    updateGeometry();
+}
+
+KMessageWidget::MessageType KMessageWidget::messageType() const
+{
+    return d->messageType;
+}
+
+static QColor darkShade(QColor c)
+{
+    qreal contrast = 0.7; // taken from kcolorscheme for the dark shade
+
+    qreal darkAmount;
+    if (c.lightnessF() < 0.006) { /* too dark */
+        darkAmount = 0.02 + 0.40 * contrast;
+    } else if (c.lightnessF() > 0.93) { /* too bright */
+        darkAmount = -0.06 - 0.60 * contrast;
+    } else {
+        darkAmount = (-c.lightnessF()) * (0.55 + contrast * 0.35);
+    }
+
+    qreal v = c.lightnessF() + darkAmount;
+    v = v > 0.0 ? (v < 1.0 ? v : 1.0) : 0.0;
+    c.setHsvF(c.hslHueF(), c.hslSaturationF(), v);
+    return c;
+}
+
+void KMessageWidget::setMessageType(KMessageWidget::MessageType type)
+{
+    d->messageType = type;
+    QColor bg0, bg1, bg2, border, fg;
+    switch (type) {
+    case Positive:
+        bg1.setRgb(0, 110,  40); // values taken from kcolorscheme.cpp (Positive)
+        break;
+    case Information:
+        bg1 = palette().highlight().color();
+        break;
+    case Warning:
+        bg1.setRgb(176, 128, 0); // values taken from kcolorscheme.cpp (Neutral)
+        break;
+    case Error:
+        bg1.setRgb(191, 3, 3); // values taken from kcolorscheme.cpp (Negative)
+        break;
+    }
+
+    // Colors
+    fg = palette().highlightedText().color();
+    bg0 = bg1.lighter(110);
+    bg2 = bg1.darker(110);
+    border = darkShade(bg1);
+
+    d->content->setStyleSheet(
+        QString(QLatin1String(".QFrame {"
+                              "background-color: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1,"
+                              "    stop: 0 %1,"
+                              "    stop: 0.1 %2,"
+                              "    stop: 1.0 %3);"
+                              "border-radius: 5px;"
+                              "border: 1px solid %4;"
+                              "margin: %5px;"
+                              "}"
+                              ".QLabel { color: %6; }"
+                             ))
+        .arg(bg0.name())
+        .arg(bg1.name())
+        .arg(bg2.name())
+        .arg(border.name())
+        // DefaultFrameWidth returns the size of the external margin + border width. We know our border is 1px, so we subtract this from the frame normal QStyle FrameWidth to get our margin
+        .arg(style()->pixelMetric(QStyle::PM_DefaultFrameWidth, 0, this) - 1)
+        .arg(fg.name())
+    );
+}
+
+QSize KMessageWidget::sizeHint() const
+{
+    ensurePolished();
+    return d->content->sizeHint();
+}
+
+QSize KMessageWidget::minimumSizeHint() const
+{
+    ensurePolished();
+    return d->content->minimumSizeHint();
+}
+
+bool KMessageWidget::event(QEvent *event)
+{
+    if (event->type() == QEvent::Polish && !d->content->layout()) {
+        d->createLayout();
+    }
+    return QFrame::event(event);
+}
+
+void KMessageWidget::resizeEvent(QResizeEvent *event)
+{
+    QFrame::resizeEvent(event);
+
+    if (d->timeLine->state() == QTimeLine::NotRunning) {
+        d->content->resize(width(), d->bestContentHeight());
+    }
+}
+
+int KMessageWidget::heightForWidth(int width) const
+{
+    ensurePolished();
+    return d->content->heightForWidth(width);
+}
+
+void KMessageWidget::paintEvent(QPaintEvent *event)
+{
+    QFrame::paintEvent(event);
+    if (d->timeLine->state() == QTimeLine::Running) {
+        QPainter painter(this);
+        painter.setOpacity(d->timeLine->currentValue() * d->timeLine->currentValue());
+        painter.drawPixmap(0, 0, d->contentSnapShot);
+    }
+}
+
+bool KMessageWidget::wordWrap() const
+{
+    return d->wordWrap;
+}
+
+void KMessageWidget::setWordWrap(bool wordWrap)
+{
+    d->wordWrap = wordWrap;
+    d->textLabel->setWordWrap(wordWrap);
+    QSizePolicy policy = sizePolicy();
+    policy.setHeightForWidth(wordWrap);
+    setSizePolicy(policy);
+    d->updateLayout();
+    // Without this, when user does wordWrap -> !wordWrap -> wordWrap, a minimum
+    // height is set, causing the widget to be too high.
+    // Mostly visible in test programs.
+    if (wordWrap) {
+        setMinimumHeight(0);
+    }
+}
+
+bool KMessageWidget::isCloseButtonVisible() const
+{
+    return d->closeButton->isVisible();
+}
+
+void KMessageWidget::setCloseButtonVisible(bool show)
+{
+    d->closeButton->setVisible(show);
+    updateGeometry();
+}
+
+void KMessageWidget::addAction(QAction *action)
+{
+    QFrame::addAction(action);
+    d->updateLayout();
+}
+
+void KMessageWidget::removeAction(QAction *action)
+{
+    QFrame::removeAction(action);
+    d->updateLayout();
+}
+
+void KMessageWidget::animatedShow()
+{
+    if (!style()->styleHint(QStyle::SH_Widget_Animate, 0, this)) {
+        show();
+        emit showAnimationFinished();
+        return;
+    }
+
+    if (isVisible()) {
+        return;
+    }
+
+    QFrame::show();
+    setFixedHeight(0);
+    int wantedHeight = d->bestContentHeight();
+    d->content->setGeometry(0, -wantedHeight, width(), wantedHeight);
+
+    d->updateSnapShot();
+
+    d->timeLine->setDirection(QTimeLine::Forward);
+    if (d->timeLine->state() == QTimeLine::NotRunning) {
+        d->timeLine->start();
+    }
+}
+
+void KMessageWidget::animatedHide()
+{
+    if (!style()->styleHint(QStyle::SH_Widget_Animate, 0, this)) {
+        hide();
+        emit hideAnimationFinished();
+        return;
+    }
+
+    if (!isVisible()) {
+        hide();
+        return;
+    }
+
+    d->content->move(0, -d->content->height());
+    d->updateSnapShot();
+
+    d->timeLine->setDirection(QTimeLine::Backward);
+    if (d->timeLine->state() == QTimeLine::NotRunning) {
+        d->timeLine->start();
+    }
+}
+
+bool KMessageWidget::isHideAnimationRunning() const
+{
+    return (d->timeLine->direction() == QTimeLine::Backward)
+        && (d->timeLine->state() == QTimeLine::Running);
+}
+
+bool KMessageWidget::isShowAnimationRunning() const
+{
+    return (d->timeLine->direction() == QTimeLine::Forward)
+        && (d->timeLine->state() == QTimeLine::Running);
+}
+
+QIcon KMessageWidget::icon() const
+{
+    return d->icon;
+}
+
+void KMessageWidget::setIcon(const QIcon &icon)
+{
+    d->icon = icon;
+    if (d->icon.isNull()) {
+        d->iconLabel->hide();
+    } else {
+        const int size = style()->pixelMetric(QStyle::PM_ToolBarIconSize);
+        d->iconLabel->setPixmap(d->icon.pixmap(size));
+        d->iconLabel->show();
+    }
+}
+
+#include "moc_kmessagewidget.cpp"