plasma-framework/popupapplet.cpp
Aaron J. Seigo 8620f483d8 always make a layout no matter what
svn path=/trunk/KDE/kdelibs/; revision=906713
2009-01-06 18:08:58 +00:00

640 lines
18 KiB
C++

/*
* Copyright 2008 by Montel Laurent <montel@kde.org>
* Copyright 2008 by Marco Martin <notmart@gmail.com>
*
* 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 St, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#include "popupapplet.h"
#include "private/popupapplet_p.h"
#include <QGraphicsProxyWidget>
#include <QGraphicsLinearLayout>
#include <QVBoxLayout>
#include <QTimer>
#include <QApplication>
#include <kicon.h>
#include <kiconloader.h>
#include <kwindowsystem.h>
#include <kglobalsettings.h>
#include "plasma/private/applet_p.h"
#include "plasma/corona.h"
#include "plasma/containment.h"
#include "plasma/dialog.h"
#include "plasma/extender.h"
#include "plasma/tooltipmanager.h"
#include "plasma/widgets/iconwidget.h"
namespace Plasma
{
PopupApplet::PopupApplet(QObject *parent, const QVariantList &args)
: Plasma::Applet(parent, args),
d(new PopupAppletPrivate(this))
{
int iconSize = IconSize(KIconLoader::Desktop);
resize(iconSize, iconSize);
connect(this, SIGNAL(activate()), this, SLOT(internalTogglePopup()));
}
PopupApplet::~PopupApplet()
{
delete widget();
delete d;
}
void PopupApplet::setPopupIcon(const QIcon &icon)
{
if (icon.isNull()) {
if (d->icon) {
delete d->icon;
d->icon = 0;
setLayout(0);
setAspectRatioMode(d->savedAspectRatio);
}
return;
}
if (!d->icon) {
d->icon = new Plasma::IconWidget(icon, QString(), this);
connect(d->icon, SIGNAL(clicked()), this, SLOT(internalTogglePopup()));
QGraphicsLinearLayout *layout = new QGraphicsLinearLayout();
layout->setContentsMargins(0, 0, 0, 0);
layout->setSpacing(0);
layout->setOrientation(Qt::Horizontal);
if (formFactor() == Plasma::Vertical || formFactor() == Plasma::Horizontal ) {
d->savedAspectRatio = aspectRatioMode();
setAspectRatioMode(Plasma::ConstrainedSquare);
}
setLayout(layout);
} else {
d->icon->setIcon(icon);
}
}
void PopupApplet::setPopupIcon(const QString &iconName)
{
setPopupIcon(KIcon(iconName));
}
QIcon PopupApplet::popupIcon() const
{
return d->icon ? d->icon->icon() : QIcon();
}
QWidget *PopupApplet::widget()
{
return 0;
}
QGraphicsWidget *PopupApplet::graphicsWidget()
{
return static_cast<Applet*>(this)->d->extender;
}
void PopupAppletPrivate::checkExtenderAppearance(Plasma::FormFactor f)
{
Extender *extender = qobject_cast<Extender*>(q->graphicsWidget());
if (extender) {
if (f != Plasma::Horizontal && f != Plasma::Vertical) {
extender->setAppearance(Extender::NoBorders);
} else if (q->location() == TopEdge) {
extender->setAppearance(Extender::TopDownStacked);
} else {
extender->setAppearance(Extender::BottomUpStacked);
}
if (dialog) {
dialog->setGraphicsWidget(extender);
}
}
}
void PopupAppletPrivate::popupConstraintsEvent(Plasma::Constraints constraints)
{
if (constraints & Plasma::StartupCompletedConstraint) {
startupComplete = true;
}
if (!startupComplete) {
return;
}
Plasma::FormFactor f = q->formFactor();
if (constraints & Plasma::LocationConstraint) {
checkExtenderAppearance(f);
}
if (constraints & Plasma::FormFactorConstraint ||
constraints & Plasma::StartupCompletedConstraint ||
(constraints & Plasma::SizeConstraint &&
(f == Plasma::Vertical || f == Plasma::Horizontal))) {
QGraphicsLinearLayout *lay = dynamic_cast<QGraphicsLinearLayout *>(q->layout());
if (icon && !icon->icon().isNull() && lay) {
lay->removeAt(0);
}
QSizeF minimum;
QSizeF containmentSize;
QGraphicsWidget *gWidget = q->graphicsWidget();
kDebug() << "graphics widget is" << (QObject*)gWidget;
QWidget *qWidget = q->widget();
if (gWidget) {
minimum = gWidget->minimumSize();
// our layout may have been replaced on us in the call to graphicsWidget!
lay = dynamic_cast<QGraphicsLinearLayout *>(q->layout());
if (!(constraints & LocationConstraint)) {
checkExtenderAppearance(f);
}
} else if (qWidget) {
minimum = qWidget->minimumSizeHint();
}
if (q->containment()) {
containmentSize = q->containment()->size();
}
//Applet on desktop
if (icon && !icon->icon().isNull() && ((f != Plasma::Vertical && f != Plasma::Horizontal) ||
((f == Plasma::Vertical && containmentSize.width() >= minimum.width()) ||
(f == Plasma::Horizontal && containmentSize.height() >= minimum.height())))) {
kDebug() << "we are expanding the popupapplet";
// we only switch to expanded if we aren't horiz/vert constrained and
// this applet has an icon.
// otherwise, we leave it up to the applet itself to figure it out
if (icon) {
icon->hide();
}
if (savedAspectRatio != Plasma::InvalidAspectRatioMode) {
q->setAspectRatioMode(savedAspectRatio);
}
if (dialog) {
if (dialog->layout() && qWidget) {
//we don't want to delete Widget inside the dialog layout
dialog->layout()->removeWidget(qWidget);
}
if (qWidget) {
qWidget->setParent(0);
}
delete dialog;
dialog = 0;
}
if (!lay) {
lay = new QGraphicsLinearLayout();
lay->setContentsMargins(0, 0, 0, 0);
lay->setSpacing(0);
lay->setOrientation(Qt::Horizontal);
q->setLayout(lay);
}
QSize prefSize;
if (gWidget) {
Corona *corona = qobject_cast<Corona *>(gWidget->scene());
if (corona) {
corona->removeOffscreenWidget(gWidget);
}
lay->addItem(gWidget);
prefSize = gWidget->preferredSize().toSize();
} else if (qWidget) {
if (!proxy) {
proxy = new QGraphicsProxyWidget(q);
proxy->setWidget(qWidget);
proxy->show();
}
lay->addItem(proxy);
prefSize = qWidget->sizeHint();
}
//we could be on a big panel, but in that case we will be able to resize
//more than the natural minimum size, because we'll transform into an icon
if (f == Plasma::Horizontal) {
minimum.setHeight(0);
} else if (f == Plasma::Vertical) {
minimum.setWidth(0);
}
qreal left, top, right, bottom;
q->getContentsMargins(&left, &top, &right, &bottom);
QSizeF oldSize(q->size());
q->setMinimumSize(minimum + QSizeF(left+right, top+bottom));
//size not saved/invalid size saved
if (oldSize.width() < q->minimumSize().width() || oldSize.height() < q->minimumSize().height()) {
q->resize(prefSize);
}
//FIXME: this will be automatically propagated by the qgraphicslayout in the future
lay->setPreferredSize(prefSize);
//Applet on popup
} else {
kDebug() << "about to switch to a popup";
//save the aspect ratio mode in case we drag'n drop in the Desktop later
savedAspectRatio = q->aspectRatioMode();
if (icon) {
icon->show();
q->setAspectRatioMode(Plasma::ConstrainedSquare);
}
if (proxy) {
proxy->setWidget(0); // prevent it from deleting our widget!
delete proxy;
proxy = 0;
}
if (!dialog) {
dialog = new Plasma::Dialog();
//no longer use Qt::Popup since that seems to cause a lot of problem when you drag
//stuff out of your Dialog (extenders). Monitor WindowDeactivate events so we can
//emulate the same kind of behavior as Qt::Popup (close when you click somewhere
//else.
Qt::WindowFlags wflags = Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint;
if (passive) {
wflags |= Qt::X11BypassWindowManagerHint;
}
dialog->setWindowFlags(wflags);
KWindowSystem::setState(dialog->winId(), NET::SkipTaskbar | NET::SkipPager);
dialog->installEventFilter(q);
q->setMinimumSize(QSize(0, 0));
if (gWidget) {
Corona *corona = qobject_cast<Corona *>(gWidget->scene());
//could that cast ever fail??
if (corona) {
corona->addOffscreenWidget(gWidget);
dialog->setGraphicsWidget(gWidget);
}
} else if (qWidget) {
QVBoxLayout *l_layout = new QVBoxLayout(dialog);
l_layout->setSpacing(0);
l_layout->setMargin(0);
l_layout->addWidget(qWidget);
dialog->adjustSize();
}
QObject::connect(dialog, SIGNAL(dialogResized()), q, SLOT(dialogSizeChanged()));
QObject::connect(dialog, SIGNAL(dialogVisible(bool)), q, SLOT(dialogStatusChanged(bool)));
}
if (icon && lay) {
lay->addItem(icon);
}
q->setMinimumSize(0,0);
}
}
}
void PopupApplet::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
if (!d->icon && !d->popupLostFocus && event->buttons() == Qt::LeftButton) {
d->clicked = scenePos().toPoint();
event->setAccepted(true);
return;
} else {
d->popupLostFocus = false;
Applet::mousePressEvent(event);
}
}
void PopupApplet::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
if (!d->icon &&
(d->clicked - scenePos().toPoint()).manhattanLength() < KGlobalSettings::dndEventDelay()) {
d->internalTogglePopup();
} else {
Applet::mouseReleaseEvent(event);
}
}
bool PopupApplet::eventFilter(QObject *watched, QEvent *event)
{
if (watched == d->dialog && (event->type() == QEvent::WindowDeactivate)) {
d->popupLostFocus = true;
hidePopup();
QTimer::singleShot(100, this, SLOT(clearPopupLostFocus()));
}
/**
if (layout() && watched == graphicsWidget() && (event->type() == QEvent::GraphicsSceneResize)) {
//sizes are recalculated in the constraintsevent so let's just call that.
d->popupConstraintsEvent(Plasma::FormFactorConstraint);
//resize vertically if necesarry.
if (formFactor() == Plasma::MediaCenter || formFactor() == Plasma::Planar) {
resize(QSizeF(size().width(), minimumHeight()));
}
}
*/
return Applet::eventFilter(watched, event);
}
void PopupApplet::showPopup(uint popupDuration)
{
if (d->dialog) {
// move the popup before its fist show, even if the show isn't triggered by
// a click, this should fix the first random position seen in some widgets
if (!d->dialog->isVisible()) {
d->internalTogglePopup();
}
if (d->timer) {
d->timer->stop();
}
if (popupDuration > 0) {
if (!d->timer) {
d->timer = new QTimer(this);
connect(d->timer, SIGNAL(timeout()), this, SLOT(hideTimedPopup()));
}
d->timer->start(popupDuration);
}
}
}
void PopupApplet::hidePopup()
{
if (d->dialog) {
d->dialog->hide();
}
}
void PopupApplet::togglePopup()
{
d->internalTogglePopup();
}
Plasma::PopupPlacement PopupApplet::popupPlacement() const
{
return d->popupPlacement;
}
void PopupApplet::popupEvent(bool)
{
}
void PopupApplet::setPassivePopup(bool passive)
{
d->passive = passive;
if (d->dialog) {
Qt::WindowFlags wflags = Qt::FramelessWindowHint | Qt::WindowStaysOnTopHint;
if (d->passive) {
wflags |= Qt::X11BypassWindowManagerHint;
}
d->dialog->setWindowFlags(wflags);
}
}
bool PopupApplet::isPassivePopup() const
{
return d->passive;
}
bool PopupApplet::isPopupShowing() const
{
return !d->dialog || d->dialog->isVisible();
}
PopupAppletPrivate::PopupAppletPrivate(PopupApplet *applet)
: q(applet),
icon(0),
dialog(0),
proxy(0),
popupPlacement(Plasma::FloatingPopup),
savedAspectRatio(Plasma::InvalidAspectRatioMode),
timer(0),
startupComplete(false),
popupLostFocus(false),
passive(false)
{
}
PopupAppletPrivate::~PopupAppletPrivate()
{
if (proxy) {
proxy->setWidget(0);
}
delete dialog;
delete icon;
}
void PopupAppletPrivate::internalTogglePopup()
{
if (!dialog) {
return;
}
if (timer) {
timer->stop();
}
if (dialog->isVisible()) {
dialog->hide();
} else {
ToolTipManager::self()->hide(q);
updateDialogPosition();
KWindowSystem::setState(dialog->winId(), NET::SkipTaskbar | NET::SkipPager);
dialog->show();
dialog->resize(dialog->size());
}
dialog->clearFocus();
}
void PopupAppletPrivate::hideTimedPopup()
{
timer->stop();
q->hidePopup();
}
void PopupAppletPrivate::clearPopupLostFocus()
{
popupLostFocus = false;
}
void PopupAppletPrivate::dialogSizeChanged()
{
//Reposition the dialog
if (dialog) {
KConfigGroup sizeGroup = q->config();
sizeGroup = KConfigGroup(&sizeGroup, "PopupApplet");
sizeGroup.writeEntry("DialogHeight", dialog->height());
sizeGroup.writeEntry("DialogWidth", dialog->width());
updateDialogPosition();
emit q->configNeedsSaving();
}
}
void PopupAppletPrivate::dialogStatusChanged(bool status)
{
q->popupEvent(status);
}
void PopupAppletPrivate::updateDialogPosition()
{
QGraphicsView *view = q->view();
if (!view) {
return;
}
KConfigGroup sizeGroup = q->config();
sizeGroup = KConfigGroup(&sizeGroup, "PopupApplet");
Q_ASSERT(q->containment());
Q_ASSERT(q->containment()->corona());
int preferredWidth = 0;
int preferredHeight = 0;
if (dialog->graphicsWidget()) {
preferredWidth = dialog->graphicsWidget()->preferredSize().width();
preferredHeight = dialog->graphicsWidget()->preferredSize().height();
}
const int width = qMin(sizeGroup.readEntry("DialogWidth", preferredWidth),
q->containment()->corona()->screenGeometry(-1).width() - 50);
const int height = qMin(sizeGroup.readEntry("DialogHeight", preferredHeight),
q->containment()->corona()->screenGeometry(-1).height() - 50);
QSize saved(width, height);
if (saved.isNull()) {
dialog->adjustSize();
} else {
saved = saved.expandedTo(dialog->minimumSizeHint());
dialog->resize(saved);
}
QSize s = dialog->size();
QPoint pos = view->mapFromScene(q->scenePos());
//try to access a corona
if (q->containment() && q->containment()->corona()) {
pos = q->containment()->corona()->popupPosition(q, s);
} else {
Corona *corona = qobject_cast<Corona *>(q->scene());
if (corona) {
pos = corona->popupPosition(q, s);
}
}
bool reverse = false;
if (q->formFactor() == Plasma::Vertical) {
if (view->mapToGlobal(view->mapFromScene(q->scenePos())).y() + q->size().height()/2 < pos.y() + dialog->size().width()/2) {
reverse = true;
}
} else {
if (view->mapToGlobal(view->mapFromScene(q->scenePos())).x() + q->size().width()/2 < pos.x() + dialog->size().width()/2) {
reverse = true;
}
}
switch (q->location()) {
case BottomEdge:
if (pos.x() >= q->pos().x()) {
dialog->setResizeHandleCorners(Dialog::NorthEast);
} else {
dialog->setResizeHandleCorners(Dialog::NorthWest);
}
if (reverse) {
popupPlacement = Plasma::TopPosedLeftAlignedPopup;
} else {
popupPlacement = Plasma::TopPosedRightAlignedPopup;
}
break;
case TopEdge:
if (pos.x() >= q->pos().x()) {
dialog->setResizeHandleCorners(Dialog::SouthEast);
} else {
dialog->setResizeHandleCorners(Dialog::SouthWest);
}
if (reverse) {
popupPlacement = Plasma::BottomPosedLeftAlignedPopup;
} else {
popupPlacement = Plasma::BottomPosedRightAlignedPopup;
}
break;
case LeftEdge:
if (pos.y() >= q->pos().y()) {
dialog->setResizeHandleCorners(Dialog::SouthEast);
} else {
dialog->setResizeHandleCorners(Dialog::NorthEast);
}
if (reverse) {
popupPlacement = Plasma::RightPosedTopAlignedPopup;
} else {
popupPlacement = Plasma::RightPosedBottomAlignedPopup;
}
break;
case RightEdge:
if (pos.y() >= q->pos().y()) {
dialog->setResizeHandleCorners(Dialog::SouthWest);
} else {
dialog->setResizeHandleCorners(Dialog::NorthWest);
}
if (reverse) {
popupPlacement = Plasma::LeftPosedTopAlignedPopup;
} else {
popupPlacement = Plasma::LeftPosedBottomAlignedPopup;
}
break;
default:
dialog->setResizeHandleCorners(Dialog::NorthEast);
}
dialog->move(pos);
}
} // Plasma namespace
#include "popupapplet.moc"