plasma-framework/widgets/tabbar.cpp

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/*
* Copyright 2008 Marco Martin <notmart@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as
* published by the Free Software Foundation; either version 2, or
* (at your option) any later version.
*
* This program 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 General Public License for more details
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "tabbar.h"
#include <QGraphicsLinearLayout>
#include <QGraphicsLayoutItem>
#include <QString>
#include <QGraphicsScene>
#include <QGraphicsProxyWidget>
#include <QGraphicsSceneWheelEvent>
#include <QIcon>
#include <QStyleOption>
#include <QPainter>
#include <kdebug.h>
#include <plasma/animator.h>
#include <plasma/theme.h>
#include "private/nativetabbar_p.h"
namespace Plasma
{
class TabBarProxy : public QGraphicsProxyWidget
{
public:
TabBarProxy(QGraphicsWidget *parent)
: QGraphicsProxyWidget(parent)
{
native = new NativeTabBar();
native->setAttribute(Qt::WA_NoSystemBackground);
setWidget(native);
setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
}
void paint(QPainter *painter,
const QStyleOptionGraphicsItem *option,
QWidget *widget)
{
Q_UNUSED(option);
Q_UNUSED(widget);
//Don't paint the child widgets
static_cast<NativeTabBar *>(QGraphicsProxyWidget::widget())->render(
painter, QPoint(0, 0), QRegion(), 0);
}
NativeTabBar *native;
};
class TabBarPrivate
{
public:
TabBarPrivate(TabBar *parent)
: q(parent),
tabProxy(0),
currentIndex(0),
tabWidgetMode(true),
oldPage(0),
newPage(0),
oldPageAnimId(-1),
newPageAnimId(-1),
customFont(true)
{
}
~TabBarPrivate()
{
}
void updateTabWidgetMode();
void slidingCompleted(QGraphicsItem *item);
void shapeChanged(const KTabBar::Shape shape);
void setPalette();
TabBar *q;
TabBarProxy *tabProxy;
QList<QGraphicsWidget *> pages;
QGraphicsLinearLayout *mainLayout;
QGraphicsLinearLayout *tabWidgetLayout;
QGraphicsLinearLayout *tabBarLayout;
int currentIndex;
bool tabWidgetMode;
QGraphicsWidget *oldPage;
QGraphicsWidget *newPage;
int oldPageAnimId;
int newPageAnimId;
bool customFont;
};
void TabBarPrivate::updateTabWidgetMode()
{
bool tabWidget = false;
foreach (QGraphicsWidget *page, pages) {
if (page->preferredSize() != QSize(0, 0)) {
tabWidget = true;
break;
}
}
if (tabWidget != tabWidgetMode) {
if (tabWidget) {
mainLayout->removeAt(0);
tabBarLayout->insertItem(1, tabProxy);
mainLayout->addItem(tabWidgetLayout);
} else {
mainLayout->removeAt(0);
tabBarLayout->removeAt(1);
mainLayout->addItem(tabProxy);
}
}
//always show the tabbar
//FIXME: Qt BUG: calling show on a child of an hidden item it shows it anyways
//so we avoid to call it if the parent is hidden
if (!tabWidget && q->isVisible()) {
q->setTabBarShown(true);
}
tabWidgetMode = tabWidget;
}
void TabBarPrivate::slidingCompleted(QGraphicsItem *item)
{
if (item == oldPage || item == newPage) {
if (item == newPage) {
tabWidgetLayout->addItem(newPage);
newPageAnimId = -1;
} else {
oldPageAnimId = -1;
item->hide();
}
q->setFlags(0);
}
}
void TabBarPrivate::shapeChanged(const QTabBar::Shape shape)
{
//FIXME: QGraphicsLinearLayout doesn't have setDirection, so for now
// North is equal to south and East is equal to West
switch (shape) {
case QTabBar::RoundedWest:
case QTabBar::TriangularWest:
case QTabBar::RoundedEast:
case QTabBar::TriangularEast:
tabBarLayout->setOrientation(Qt::Vertical);
tabWidgetLayout->setOrientation(Qt::Horizontal);
tabWidgetLayout->itemAt(0)->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Preferred);
if (tabWidgetLayout->count() > 1) {
tabWidgetLayout->itemAt(1)->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
}
tabProxy->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Preferred);
break;
case QTabBar::RoundedSouth:
case QTabBar::TriangularSouth:
case QTabBar::RoundedNorth:
case QTabBar::TriangularNorth:
default:
tabBarLayout->setOrientation(Qt::Horizontal);
tabWidgetLayout->setOrientation(Qt::Vertical);
tabWidgetLayout->itemAt(0)->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Expanding);
if (tabWidgetLayout->count() > 1) {
tabWidgetLayout->itemAt(1)->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
}
tabProxy->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
}
tabProxy->setPreferredSize(tabProxy->native->sizeHint());
}
void TabBarPrivate::setPalette()
{
QTabBar *native = q->nativeWidget();
QColor color = Plasma::Theme::defaultTheme()->color(Plasma::Theme::TextColor);
QPalette p = native->palette();
p.setColor(QPalette::Normal, QPalette::Text, color);
p.setColor(QPalette::Inactive, QPalette::Text, color);
p.setColor(QPalette::Normal, QPalette::ButtonText, color);
p.setColor(QPalette::Inactive, QPalette::ButtonText, color);
p.setColor(QPalette::Normal, QPalette::Base, QColor(0,0,0,0));
p.setColor(QPalette::Inactive, QPalette::Base, QColor(0,0,0,0));
native->setPalette(p);
if (!customFont) {
q->nativeWidget()->setFont(Plasma::Theme::defaultTheme()->font(Plasma::Theme::DefaultFont));
}
}
TabBar::TabBar(QGraphicsWidget *parent)
: QGraphicsWidget(parent),
d(new TabBarPrivate(this))
{
d->tabProxy = new TabBarProxy(this);
d->tabWidgetLayout = new QGraphicsLinearLayout(Qt::Vertical);
d->tabBarLayout = new QGraphicsLinearLayout(Qt::Horizontal);
d->mainLayout = new QGraphicsLinearLayout(Qt::Horizontal);
d->mainLayout->addItem(d->tabWidgetLayout);
setLayout(d->mainLayout);
d->mainLayout->setContentsMargins(0,0,0,0);
d->tabWidgetLayout->addItem(d->tabBarLayout);
//tabBar is centered, so a stretch at begin one at the end
d->tabBarLayout->addStretch();
d->tabBarLayout->addItem(d->tabProxy);
d->tabBarLayout->addStretch();
//d->tabBarLayout->setStretchFactor(d->tabProxy, 2);
connect(d->tabProxy->native, SIGNAL(currentChanged(int)),
this, SLOT(setCurrentIndex(int)));
connect(d->tabProxy->native, SIGNAL(shapeChanged(QTabBar::Shape)),
this, SLOT(shapeChanged(QTabBar::Shape)));
connect(Plasma::Animator::self(), SIGNAL(movementFinished(QGraphicsItem*)),
this, SLOT(slidingCompleted(QGraphicsItem*)));
connect(Theme::defaultTheme(), SIGNAL(themeChanged()),
this, SLOT(setPalette()));
}
TabBar::~TabBar()
{
delete d;
}
int TabBar::insertTab(int index, const QIcon &icon, const QString &label,
QGraphicsLayoutItem *content)
{
QGraphicsWidget *page = new QGraphicsWidget(this);
page->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
if (content) {
if (content->isLayout()) {
page->setLayout(static_cast<QGraphicsLayout *>(content));
} else {
QGraphicsLinearLayout *layout = new QGraphicsLinearLayout(Qt::Vertical, page);
layout->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
layout->addItem(content);
page->setLayout(layout);
}
} else {
page->setPreferredSize(0, 0);
}
d->pages.insert(qBound(0, index, d->pages.count()), page);
if (d->pages.count() == 1) {
d->tabWidgetLayout->addItem(page);
page->setVisible(true);
page->setEnabled(true);
} else {
page->setVisible(false);
page->setEnabled(false);
}
d->tabProxy->setPreferredSize(d->tabProxy->native->sizeHint());
d->updateTabWidgetMode();
int actualIndex = d->tabProxy->native->insertTab(index, icon, label);
d->currentIndex = d->tabProxy->native->currentIndex();
d->tabProxy->setPreferredSize(d->tabProxy->native->sizeHint());
d->updateTabWidgetMode();
return actualIndex;
}
int TabBar::insertTab(int index, const QString &label, QGraphicsLayoutItem *content)
{
return insertTab(index, QIcon(), label, content);
}
int TabBar::addTab(const QIcon &icon, const QString &label, QGraphicsLayoutItem *content)
{
return insertTab(d->pages.count(), icon, label, content);
}
int TabBar::addTab(const QString &label, QGraphicsLayoutItem *content)
{
return insertTab(d->pages.count(), QIcon(), label, content);
}
int TabBar::currentIndex() const
{
return d->tabProxy->native->currentIndex();
}
void TabBar::resizeEvent(QGraphicsSceneResizeEvent * event)
{
if (!d->tabWidgetMode) {
d->tabProxy->setMinimumSize(event->newSize().toSize());
setMinimumSize(QSize(0, 0));
setMaximumSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX);
} else {
d->tabProxy->native->setMinimumSize(QSize(0,0));
}
}
void TabBar::setCurrentIndex(int index)
{
if (index >= d->tabProxy->native->count() ||
d->tabProxy->native->count() <= 1 ||
d->currentIndex == index) {
return;
}
d->tabWidgetLayout->removeAt(1);
if (d->currentIndex >= 0) {
d->oldPage = d->pages[d->currentIndex];
} else {
d->oldPage = 0;
}
if (index >= 0) {
d->newPage = d->pages[index];
} else {
d->newPage = 0;
}
if (d->newPage && d->oldPage) {
d->newPage->resize(d->oldPage->size());
}
setFlags(QGraphicsItem::ItemClipsChildrenToShape);
//if an animation was in rogress hide everything to avoid an inconsistent state
if (d->newPageAnimId != -1 || d->oldPageAnimId != -1) {
foreach (QGraphicsWidget *page, d->pages) {
page->hide();
}
if (d->newPageAnimId != -1) {
Animator::self()->stopItemMovement(d->newPageAnimId);
}
if (d->oldPageAnimId != -1) {
Animator::self()->stopItemMovement(d->oldPageAnimId);
}
}
if (d->newPage) {
d->newPage->show();
d->newPage->setEnabled(true);
}
if (d->oldPage) {
d->oldPage->show();
d->oldPage->setEnabled(false);
}
if (d->newPage && d->oldPage) {
QRect beforeCurrentGeom(d->oldPage->geometry().toRect());
beforeCurrentGeom.moveTopRight(beforeCurrentGeom.topLeft());
d->newPageAnimId = Animator::self()->moveItem(
d->newPage, Plasma::Animator::SlideOutMovement,
d->oldPage->pos().toPoint());
if (index > d->currentIndex) {
d->newPage->setPos(d->oldPage->geometry().topRight());
d->oldPageAnimId = Animator::self()->moveItem(
d->oldPage, Plasma::Animator::SlideOutMovement,
beforeCurrentGeom.topLeft());
} else {
d->newPage->setPos(beforeCurrentGeom.topLeft());
d->oldPageAnimId = Animator::self()->moveItem(
d->oldPage, Plasma::Animator::SlideOutMovement,
d->oldPage->geometry().topRight().toPoint());
}
} else {
d->tabWidgetLayout->addItem(d->newPage);
}
d->currentIndex = index;
emit currentChanged(index);
d->tabProxy->native->setCurrentIndex(index);
}
int TabBar::count() const
{
return d->pages.count();
}
void TabBar::removeTab(int index)
{
if (index > d->pages.count()) {
return;
}
int oldCurrentIndex = d->tabProxy->native->currentIndex();
d->tabProxy->native->removeTab(index);
QGraphicsWidget *page = d->pages.takeAt(index);
int currentIndex = d->tabProxy->native->currentIndex();
if (oldCurrentIndex == index) {
d->tabWidgetLayout->removeAt(1);
}
scene()->removeItem(page);
page->deleteLater();
if (oldCurrentIndex != currentIndex) {
setCurrentIndex(currentIndex);
}
d->updateTabWidgetMode();
d->tabProxy->setPreferredSize(d->tabProxy->native->sizeHint());
}
QGraphicsLayoutItem *TabBar::takeTab(int index)
{
if (index > d->pages.count()) {
return 0;
}
int oldCurrentIndex = d->tabProxy->native->currentIndex();
d->tabProxy->native->removeTab(index);
QGraphicsWidget *page = d->pages.takeAt(index);
int currentIndex = d->tabProxy->native->currentIndex();
if (oldCurrentIndex == index) {
d->tabWidgetLayout->removeAt(1);
}
QGraphicsLayoutItem *returnItem = 0;
QGraphicsLayout *lay = page->layout();
if (lay && lay->count() == 1) {
returnItem = lay->itemAt(0);
lay->removeAt(0);
} else {
returnItem = lay;
}
if (returnItem) {
returnItem->setParentLayoutItem(0);
}
page->setLayout(0);
scene()->removeItem(page);
page->deleteLater();
if (oldCurrentIndex != currentIndex) {
setCurrentIndex(currentIndex);
}
d->updateTabWidgetMode();
d->tabProxy->setPreferredSize(d->tabProxy->native->sizeHint());
return returnItem;
}
QGraphicsLayoutItem *TabBar::tabAt(int index)
{
if (index > d->pages.count()) {
return 0;
}
QGraphicsWidget *page = d->pages.value(index);
QGraphicsLayoutItem *returnItem = 0;
QGraphicsLayout *lay = page->layout();
if (lay && lay->count() == 1) {
returnItem = lay->itemAt(0);
} else {
returnItem = lay;
}
return returnItem;
}
void TabBar::setTabText(int index, const QString &label)
{
if (index > d->pages.count()) {
return;
}
d->tabProxy->native->setTabText(index, label);
}
QString TabBar::tabText(int index) const
{
return d->tabProxy->native->tabText(index);
}
void TabBar::setTabIcon(int index, const QIcon &icon)
{
d->tabProxy->native->setTabIcon(index, icon);
}
QIcon TabBar::tabIcon(int index) const
{
return d->tabProxy->native->tabIcon(index);
}
void TabBar::setTabBarShown(bool show)
{
if (!show && !d->tabWidgetMode) {
return;
}
if (!show && d->tabProxy->isVisible()) {
d->tabProxy->hide();
d->tabBarLayout->removeItem(d->tabProxy);
} else if (show && !d->tabProxy->isVisible()) {
d->tabProxy->show();
d->tabBarLayout->insertItem(0, d->tabProxy);
}
}
bool TabBar::isTabBarShown() const
{
return d->tabProxy->isVisible();
}
void TabBar::setStyleSheet(const QString &stylesheet)
{
d->tabProxy->native->setStyleSheet(stylesheet);
}
QString TabBar::styleSheet() const
{
return d->tabProxy->native->styleSheet();
}
KTabBar *TabBar::nativeWidget() const
{
return d->tabProxy->native;
}
void TabBar::wheelEvent(QGraphicsSceneWheelEvent * event)
{
Q_UNUSED(event)
//Still here for binary compatibility
}
void TabBar::changeEvent(QEvent *event)
{
if (event->type() == QEvent::FontChange) {
d->customFont = true;
nativeWidget()->setFont(font());
}
QGraphicsWidget::changeEvent(event);
}
} // namespace Plasma
#include <tabbar.moc>