Use KMessageWidget to show errors - copy of KDE code taken for pre KDE4.7 and
Qt only builds.
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craig
372
widgets/messagewidget.cpp
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372
widgets/messagewidget.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 "MessageWidget.h"
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#include <kaction.h>
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#include <kcolorscheme.h>
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#include <kdebug.h>
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#include <kglobalsettings.h>
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#include <kicon.h>
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#include <kiconloader.h>
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#include <kstandardaction.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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//---------------------------------------------------------------------
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// MessageWidgetPrivate
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//---------------------------------------------------------------------
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class MessageWidgetPrivate
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{
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public:
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void init(MessageWidget*);
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MessageWidget* q;
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QFrame* content;
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QLabel* iconLabel;
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QLabel* textLabel;
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QToolButton* closeButton;
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QTimeLine* timeLine;
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MessageWidget::MessageType messageType;
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bool wordWrap;
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QList<QToolButton*> buttons;
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QPixmap contentSnapShot;
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void createLayout();
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void updateSnapShot();
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void updateLayout();
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};
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void MessageWidgetPrivate::init(MessageWidget *q_ptr)
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{
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q = q_ptr;
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q->setSizePolicy(QSizePolicy::Expanding, 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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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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KAction* closeAction = KStandardAction::close(q, SLOT(animatedHide()), q);
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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(MessageWidget::InformationMessageType);
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}
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void MessageWidgetPrivate::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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buttons.append(button);
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}
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// Only set autoRaise on if there are no buttons, otherwise the close
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// button looks weird
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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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layout->addWidget(iconLabel, 0, 0);
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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 here, but not in
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// wordwrap mode
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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 MessageWidgetPrivate::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 MessageWidgetPrivate::updateSnapShot()
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{
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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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//---------------------------------------------------------------------
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// MessageWidget
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//---------------------------------------------------------------------
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MessageWidget::MessageWidget(QWidget* parent)
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: QFrame(parent)
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, d(new MessageWidgetPrivate)
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{
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d->init(this);
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}
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MessageWidget::MessageWidget(const QString& text, QWidget* parent)
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: QFrame(parent)
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, d(new MessageWidgetPrivate)
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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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MessageWidget::~MessageWidget()
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{
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delete d;
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}
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QString MessageWidget::text() const
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{
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return d->textLabel->text();
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}
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void MessageWidget::setText(const QString& text)
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{
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d->textLabel->setText(text);
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}
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MessageWidget::MessageType MessageWidget::messageType() const
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{
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return d->messageType;
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}
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void MessageWidget::setMessageType(MessageWidget::MessageType type)
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{
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d->messageType = type;
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KIcon icon;
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KColorScheme::BackgroundRole bgRole;
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KColorScheme::ForegroundRole fgRole;
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KColorScheme::ColorSet colorSet = KColorScheme::Window;
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switch (type) {
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case PositiveMessageType:
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icon = KIcon("dialog-ok");
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bgRole = KColorScheme::PositiveBackground;
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fgRole = KColorScheme::PositiveText;
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break;
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case InformationMessageType:
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icon = KIcon("dialog-information");
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bgRole = KColorScheme::NormalBackground;
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fgRole = KColorScheme::NormalText;
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colorSet = KColorScheme::Tooltip;
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break;
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case WarningMessageType:
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icon = KIcon("dialog-warning");
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bgRole = KColorScheme::NeutralBackground;
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fgRole = KColorScheme::NeutralText;
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break;
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case ErrorMessageType:
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icon = KIcon("dialog-error");
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bgRole = KColorScheme::NegativeBackground;
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fgRole = KColorScheme::NegativeText;
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break;
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}
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const int size = KIconLoader::global()->currentSize(KIconLoader::MainToolbar);
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d->iconLabel->setPixmap(icon.pixmap(size));
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KColorScheme scheme(QPalette::Active, colorSet);
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QBrush bg = scheme.background(bgRole);
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QBrush border = scheme.foreground(fgRole);
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QBrush fg = scheme.foreground();
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d->content->setStyleSheet(
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QString(".QFrame {"
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"background-color: %1;"
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"border-radius: 5px;"
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"border: 1px solid %2;"
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"}"
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".QLabel { color: %3; }"
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)
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.arg(bg.color().name())
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.arg(border.color().name())
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.arg(fg.color().name())
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);
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}
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bool MessageWidget::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 MessageWidget::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(size());
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}
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}
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void MessageWidget::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 MessageWidget::showEvent(QShowEvent* event)
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{
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QFrame::showEvent(event);
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if (!event->spontaneous()) {
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int wantedHeight = d->content->sizeHint().height();
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d->content->setGeometry(0, 0, width(), wantedHeight);
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setFixedHeight(wantedHeight);
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}
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}
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bool MessageWidget::wordWrap() const
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{
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return d->wordWrap;
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}
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void MessageWidget::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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d->updateLayout();
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}
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bool MessageWidget::isCloseButtonVisible() const
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{
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return d->closeButton->isVisible();
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}
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void MessageWidget::setCloseButtonVisible(bool show)
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{
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d->closeButton->setVisible(show);
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}
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void MessageWidget::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 MessageWidget::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 MessageWidget::animatedShow()
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{
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if (!(KGlobalSettings::graphicEffectsLevel() & KGlobalSettings::SimpleAnimationEffects)) {
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show();
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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->content->sizeHint().height();
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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 MessageWidget::slotTimeLineChanged(qreal value)
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{
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setFixedHeight(qMin(value * 2, 1.) * d->content->height());
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repaint();
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}
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void MessageWidget::slotTimeLineFinished()
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{
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if (d->timeLine->direction() == QTimeLine::Forward) {
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// Show
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d->content->move(0, 0);
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} else {
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// Hide
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hide();
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}
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}
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void MessageWidget::animatedHide()
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{
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if (!(KGlobalSettings::graphicEffectsLevel() & KGlobalSettings::SimpleAnimationEffects)) {
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hide();
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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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