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Borrowed the KMessageWidget code to better show passive information.
Borrowed the code from KMessageWidget from Aurelian Gateau, Kdelibs, to better show passive information and notifications. instead of a popup blowing in the user's face, a nice, animated and well designed widget will gracefully fade-in, show the notes, and fade out when not needed anymore. Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
This commit is contained in:
Tomaz Canabrava
parent
56dbb7c2ff
commit
86021b24d9
7 changed files with 713 additions and 11 deletions
421
qt-ui/kmessagewidget.cpp
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421
qt-ui/kmessagewidget.cpp
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/* This file is part of the KDE libraries
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*
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* Copyright (c) 2011 Aurélien Gâteau <agateau@kde.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#include "kmessagewidget.h"
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#include <QEvent>
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#include <QGridLayout>
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#include <QHBoxLayout>
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#include <QLabel>
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#include <QPainter>
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#include <QShowEvent>
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#include <QTimeLine>
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#include <QToolButton>
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#include <QStyle>
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#include <QAction>
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void KMessageWidgetPrivate::init(KMessageWidget* q_ptr)
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{
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q = q_ptr;
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q->setSizePolicy(QSizePolicy::Minimum, QSizePolicy::Fixed);
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timeLine = new QTimeLine(500, q);
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QObject::connect(timeLine, SIGNAL(valueChanged(qreal)), q, SLOT(slotTimeLineChanged(qreal)));
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QObject::connect(timeLine, SIGNAL(finished()), q, SLOT(slotTimeLineFinished()));
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content = new QFrame(q);
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content->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
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wordWrap = false;
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iconLabel = new QLabel(content);
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iconLabel->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
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iconLabel->hide();
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textLabel = new QLabel(content);
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textLabel->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
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textLabel->setTextInteractionFlags(Qt::TextBrowserInteraction);
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QObject::connect(textLabel, SIGNAL(linkActivated(const QString&)), q, SIGNAL(linkActivated(const QString&)));
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QObject::connect(textLabel, SIGNAL(linkHovered(const QString&)), q, SIGNAL(linkHovered(const QString&)));
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QAction* closeAction = new QAction(QObject::tr("Close"), q);
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q->connect(closeAction, SIGNAL(toggled(bool)), q, SLOT(animatedHide()));
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closeButton = new QToolButton(content);
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closeButton->setAutoRaise(true);
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closeButton->setDefaultAction(closeAction);
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q->setMessageType(KMessageWidget::Information);
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}
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void KMessageWidgetPrivate::createLayout()
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{
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delete content->layout();
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content->resize(q->size());
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qDeleteAll(buttons);
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buttons.clear();
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Q_FOREACH(QAction* action, q->actions()) {
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QToolButton* button = new QToolButton(content);
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button->setDefaultAction(action);
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button->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
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buttons.append(button);
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}
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// AutoRaise reduces visual clutter, but we don't want to turn it on if
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// there are other buttons, otherwise the close button will look different
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// from the others.
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closeButton->setAutoRaise(buttons.isEmpty());
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if (wordWrap) {
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QGridLayout* layout = new QGridLayout(content);
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// Set alignment to make sure icon does not move down if text wraps
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layout->addWidget(iconLabel, 0, 0, 1, 1, Qt::AlignHCenter | Qt::AlignTop);
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layout->addWidget(textLabel, 0, 1);
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QHBoxLayout* buttonLayout = new QHBoxLayout;
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buttonLayout->addStretch();
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Q_FOREACH(QToolButton* button, buttons) {
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// For some reason, calling show() is necessary if wordwrap is true,
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// otherwise the buttons do not show up. It is not needed if
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// wordwrap is false.
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button->show();
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buttonLayout->addWidget(button);
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}
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buttonLayout->addWidget(closeButton);
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layout->addItem(buttonLayout, 1, 0, 1, 2);
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} else {
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QHBoxLayout* layout = new QHBoxLayout(content);
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layout->addWidget(iconLabel);
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layout->addWidget(textLabel);
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Q_FOREACH(QToolButton* button, buttons) {
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layout->addWidget(button);
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}
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layout->addWidget(closeButton);
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};
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if (q->isVisible()) {
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q->setFixedHeight(content->sizeHint().height());
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}
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q->updateGeometry();
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}
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void KMessageWidgetPrivate::updateLayout()
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{
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if (content->layout()) {
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createLayout();
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}
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}
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void KMessageWidgetPrivate::updateSnapShot()
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{
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// Attention: updateSnapShot calls QWidget::render(), which causes the whole
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// window layouts to be activated. Calling this method from resizeEvent()
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// can lead to infinite recursion, see:
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// https://bugs.kde.org/show_bug.cgi?id=311336
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contentSnapShot = QPixmap(content->size());
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contentSnapShot.fill(Qt::transparent);
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content->render(&contentSnapShot, QPoint(), QRegion(), QWidget::DrawChildren);
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}
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void KMessageWidgetPrivate::slotTimeLineChanged(qreal value)
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{
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q->setFixedHeight(qMin(value * 2, qreal(1.0)) * content->height());
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q->update();
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}
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void KMessageWidgetPrivate::slotTimeLineFinished()
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{
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if (timeLine->direction() == QTimeLine::Forward) {
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// Show
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// We set the whole geometry here, because it may be wrong if a
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// KMessageWidget is shown right when the toplevel window is created.
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content->setGeometry(0, 0, q->width(), bestContentHeight());
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} else {
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// Hide
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q->hide();
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}
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}
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int KMessageWidgetPrivate::bestContentHeight() const
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{
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int height = content->heightForWidth(q->width());
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if (height == -1) {
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height = content->sizeHint().height();
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}
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return height;
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}
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//---------------------------------------------------------------------
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// KMessageWidget
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//---------------------------------------------------------------------
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KMessageWidget::KMessageWidget(QWidget* parent)
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: QFrame(parent)
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, d(new KMessageWidgetPrivate)
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{
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d->init(this);
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}
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KMessageWidget::KMessageWidget(const QString& text, QWidget* parent)
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: QFrame(parent)
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, d(new KMessageWidgetPrivate)
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{
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d->init(this);
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setText(text);
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}
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KMessageWidget::~KMessageWidget()
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{
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delete d;
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}
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QString KMessageWidget::text() const
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{
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return d->textLabel->text();
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}
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void KMessageWidget::setText(const QString& text)
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{
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d->textLabel->setText(text);
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updateGeometry();
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}
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KMessageWidget::MessageType KMessageWidget::messageType() const
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{
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return d->messageType;
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}
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void KMessageWidget::setMessageType(KMessageWidget::MessageType type)
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{
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d->messageType = type;
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QColor bg0, bg1, bg2, border, fg;
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switch (type) {
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case Positive:
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bg1 = QColor(Qt::green);
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fg = QColor(Qt::white);
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break;
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case Information:
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bg1 = QColor(Qt::blue);
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fg = QColor(Qt::black);
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break;
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case Warning:
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bg1 = QColor(Qt::yellow);
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fg = QColor(Qt::black);
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break;
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case Error:
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bg1 = QColor(Qt::red);
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fg = QColor(Qt::black);
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break;
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}
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// Colors
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bg0 = bg1.lighter(110);
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bg2 = bg1.darker(110);
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border = QColor(Qt::black);
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d->content->setStyleSheet(
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QString(".QFrame {"
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"background-color: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1,"
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" stop: 0 %1,"
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" stop: 0.1 %2,"
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" stop: 1.0 %3);"
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"border-radius: 5px;"
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"border: 1px solid %4;"
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"margin: %5px;"
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"}"
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".QLabel { color: %6; }"
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).arg(bg0.name())
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.arg(bg1.name())
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.arg(bg2.name())
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.arg(border.name())
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/*
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DefaultFrameWidth returns the size of the external margin + border width.
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We know our border is 1px, so we subtract this from the frame
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normal QStyle FrameWidth to get our margin
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*/
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.arg(style()->pixelMetric(QStyle::PM_DefaultFrameWidth, 0, this) -1)
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.arg(fg.name())
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);
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}
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QSize KMessageWidget::sizeHint() const
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{
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ensurePolished();
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return d->content->sizeHint();
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}
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QSize KMessageWidget::minimumSizeHint() const
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{
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ensurePolished();
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return d->content->minimumSizeHint();
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}
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bool KMessageWidget::event(QEvent* event)
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{
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if (event->type() == QEvent::Polish && !d->content->layout()) {
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d->createLayout();
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}
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return QFrame::event(event);
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}
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void KMessageWidget::resizeEvent(QResizeEvent* event)
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{
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QFrame::resizeEvent(event);
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if (d->timeLine->state() == QTimeLine::NotRunning) {
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d->content->resize(width(), d->bestContentHeight());
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}
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}
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int KMessageWidget::heightForWidth(int width) const
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{
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ensurePolished();
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return d->content->heightForWidth(width);
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}
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void KMessageWidget::paintEvent(QPaintEvent* event)
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{
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QFrame::paintEvent(event);
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if (d->timeLine->state() == QTimeLine::Running) {
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QPainter painter(this);
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painter.setOpacity(d->timeLine->currentValue() * d->timeLine->currentValue());
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painter.drawPixmap(0, 0, d->contentSnapShot);
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}
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}
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void KMessageWidget::showEvent(QShowEvent* event)
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{
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// Keep this method here to avoid breaking binary compatibility:
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// QFrame::showEvent() used to be reimplemented.
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QFrame::showEvent(event);
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}
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bool KMessageWidget::wordWrap() const
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{
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return d->wordWrap;
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}
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void KMessageWidget::setWordWrap(bool wordWrap)
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{
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d->wordWrap = wordWrap;
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d->textLabel->setWordWrap(wordWrap);
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QSizePolicy policy = sizePolicy();
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policy.setHeightForWidth(wordWrap);
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setSizePolicy(policy);
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d->updateLayout();
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// Without this, when user does wordWrap -> !wordWrap -> wordWrap, a minimum
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// height is set, causing the widget to be too high.
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// Mostly visible in test programs.
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if (wordWrap) {
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setMinimumHeight(0);
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}
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}
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bool KMessageWidget::isCloseButtonVisible() const
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{
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return d->closeButton->isVisible();
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}
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void KMessageWidget::setCloseButtonVisible(bool show)
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{
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d->closeButton->setVisible(show);
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updateGeometry();
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}
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void KMessageWidget::addAction(QAction* action)
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{
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QFrame::addAction(action);
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d->updateLayout();
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}
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void KMessageWidget::removeAction(QAction* action)
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{
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QFrame::removeAction(action);
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d->updateLayout();
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}
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void KMessageWidget::animatedShow()
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{
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if (isVisible()) {
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return;
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}
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QFrame::show();
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setFixedHeight(0);
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int wantedHeight = d->bestContentHeight();
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d->content->setGeometry(0, -wantedHeight, width(), wantedHeight);
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d->updateSnapShot();
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d->timeLine->setDirection(QTimeLine::Forward);
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if (d->timeLine->state() == QTimeLine::NotRunning) {
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d->timeLine->start();
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}
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}
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void KMessageWidget::animatedHide()
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{
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if (!isVisible()) {
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return;
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}
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d->content->move(0, -d->content->height());
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d->updateSnapShot();
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d->timeLine->setDirection(QTimeLine::Backward);
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if (d->timeLine->state() == QTimeLine::NotRunning) {
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d->timeLine->start();
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}
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}
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QIcon KMessageWidget::icon() const
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{
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return d->icon;
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}
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void KMessageWidget::setIcon(const QIcon& icon)
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{
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d->icon = icon;
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if (d->icon.isNull()) {
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d->iconLabel->hide();
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} else {
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d->iconLabel->setPixmap(d->icon.pixmap(QSize(16,16)));
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d->iconLabel->show();
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}
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}
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