plasma-framework/dialog.cpp

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/*
* Copyright 2008 by Alessandro Diaferia <alediaferia@gmail.com>
* Copyright 2007 by Alexis Ménard <darktears31@gmail.com>
* Copyright 2007 Sebastian Kuegler <sebas@kde.org>
* Copyright 2006 Aaron Seigo <aseigo@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 St, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#include "dialog.h"
#include <QPainter>
#include <QSvgRenderer>
#include <QResizeEvent>
#include <QMouseEvent>
#ifdef Q_WS_X11
#include <QX11Info>
#endif
#include <QBitmap>
#include <QTimer>
#include <QtGui/QVBoxLayout>
#include <QtGui/QGraphicsSceneEvent>
#include <QtGui/QGraphicsView>
#include <QtGui/QGraphicsWidget>
#include <QApplication>
#include <QDesktopWidget>
#include <QVarLengthArray>
#include <kdebug.h>
#include <kwindowsystem.h>
#include <netwm.h>
#include "plasma/applet.h"
#include "plasma/animator.h"
#include "plasma/extenders/extender.h"
#include "plasma/private/extender_p.h"
#include "plasma/framesvg.h"
#include "plasma/theme.h"
#include "plasma/windoweffects.h"
#ifdef Q_WS_X11
#include <X11/Xlib.h>
#endif
namespace Plasma
{
class DialogPrivate
{
public:
DialogPrivate(Dialog *dialog)
: q(dialog),
background(0),
view(0),
graphicsWidget(0),
resizeCorners(Dialog::NoCorner),
resizeStartCorner(Dialog::NoCorner),
moveTimer(0),
aspectRatioMode(Plasma::IgnoreAspectRatio)
{
}
~DialogPrivate()
{
}
void themeChanged();
void adjustView();
void updateResizeCorners();
int calculateWidthForHeightAndRatio(int height, qreal ratio);
Plasma::Dialog *q;
/**
* Holds the background SVG, to be re-rendered when the cache is invalidated,
* for example by resizing the dialogue.
*/
Plasma::FrameSvg *background;
QGraphicsView *view;
QGraphicsWidget *graphicsWidget;
Dialog::ResizeCorners resizeCorners;
QMap<Dialog::ResizeCorner, QRect> resizeAreas;
int resizeStartCorner;
QTimer *moveTimer;
Plasma::AspectRatioMode aspectRatioMode;
};
void DialogPrivate::themeChanged()
{
qreal topHeight;
qreal leftWidth;
qreal rightWidth;
qreal bottomHeight;
//kDebug() << leftWidth << topHeight << rightWidth << bottomHeight;
FrameSvg::EnabledBorders borders = FrameSvg::AllBorders;
Extender *extender = qobject_cast<Extender*>(graphicsWidget);
Plasma::Applet *applet = 0;
if (extender) {
applet = extender->d->applet;
} else if (graphicsWidget) {
QObject *pw = graphicsWidget;
while ((pw = pw->parent())) {
applet = dynamic_cast<Plasma::Applet *>(pw);
if (applet) {
break;
}
}
}
if (applet) {
background->getMargins(leftWidth, topHeight, rightWidth, bottomHeight);
switch (applet->location()) {
case BottomEdge:
borders &= ~FrameSvg::BottomBorder;
leftWidth = 0;
rightWidth = 0;
bottomHeight = 0;
break;
case TopEdge:
borders &= ~FrameSvg::TopBorder;
topHeight = 0;
leftWidth = 0;
rightWidth = 0;
break;
case LeftEdge:
borders &= ~FrameSvg::LeftBorder;
leftWidth = 0;
rightWidth = 0;
break;
case RightEdge:
borders &= ~FrameSvg::RightBorder;
leftWidth = 0;
rightWidth = 0;
break;
default:
break;
}
}
if (!extender && q->isVisible()) {
//remove borders at the edge of the desktop
QDesktopWidget *desktop = QApplication::desktop();
QRect avail = desktop->availableGeometry(desktop->screenNumber(q));
QRect dialogGeom = q->geometry();
if (dialogGeom.left() <= avail.left()) {
borders &= ~FrameSvg::LeftBorder;
}
if (dialogGeom.top() <= avail.top()) {
borders &= ~FrameSvg::TopBorder;
}
//FIXME: that 2 pixels offset has probably something to do with kwin
if (dialogGeom.right() + 2 > avail.right()) {
borders &= ~FrameSvg::RightBorder;
}
if (dialogGeom.bottom() + 2 > avail.bottom()) {
borders &= ~FrameSvg::BottomBorder;
}
}
background->setEnabledBorders(borders);
if (!extender) {
background->getMargins(leftWidth, topHeight, rightWidth, bottomHeight);
}
q->setContentsMargins(leftWidth, topHeight, rightWidth, bottomHeight);
q->update();
}
void DialogPrivate::adjustView()
{
if (view && graphicsWidget) {
const int prevStartCorner = resizeStartCorner;
resizeStartCorner = -1;
QSize prevSize = q->size();
/*
kDebug() << "Widget size:" << graphicsWidget->size()
<< "| Widget size hint:" << graphicsWidget->effectiveSizeHint(Qt::PreferredSize)
<< "| Widget minsize hint:" << graphicsWidget->minimumSize()
<< "| Widget maxsize hint:" << graphicsWidget->maximumSize()
<< "| Widget bounding rect:" << graphicsWidget->sceneBoundingRect();
*/
//set the sizehints correctly:
int left, top, right, bottom;
q->getContentsMargins(&left, &top, &right, &bottom);
q->setMinimumSize(qMin(int(graphicsWidget->minimumSize().width()) + left + right, QWIDGETSIZE_MAX),
qMin(int(graphicsWidget->minimumSize().height()) + top + bottom, QWIDGETSIZE_MAX));
q->setMaximumSize(qMin(int(graphicsWidget->maximumSize().width()) + left + right, QWIDGETSIZE_MAX),
qMin(int(graphicsWidget->maximumSize().height()) + top + bottom, QWIDGETSIZE_MAX));
q->resize(qMin(int(graphicsWidget->size().width()) + left + right, QWIDGETSIZE_MAX),
qMin(int(graphicsWidget->size().height()) + top + bottom, QWIDGETSIZE_MAX));
q->updateGeometry();
//reposition and resize the view.
//force a valid rect, otherwise it will take up the whole scene
QRectF sceneRect(graphicsWidget->sceneBoundingRect());
sceneRect.setWidth(qMax(qreal(1), sceneRect.width()));
sceneRect.setHeight(qMax(qreal(1), sceneRect.height()));
view->setSceneRect(sceneRect);
view->resize(graphicsWidget->size().toSize());
view->centerOn(graphicsWidget);
//if the view resized and a border is disabled move the dialog to make sure it will still look attached to panel/screen edge
qreal topHeight;
qreal leftWidth;
qreal rightWidth;
qreal bottomHeight;
background->getMargins(leftWidth, topHeight, rightWidth, bottomHeight);
if (rightWidth == 0) {
q->move(q->pos().x() + (prevSize.width() - q->size().width()), q->pos().y());
}
if (bottomHeight == 0) {
q->move(q->pos().x(), q->pos().y() + (prevSize.height() - q->size().height()));
}
if (q->size() != prevSize) {
//the size of the dialog has changed, emit the signal:
emit q->dialogResized();
}
resizeStartCorner = prevStartCorner;
}
}
int DialogPrivate::calculateWidthForHeightAndRatio(int height, qreal ratio)
{
switch (aspectRatioMode) {
case KeepAspectRatio:
return qRound(height * ratio);
break;
case Square:
return height;
break;
case ConstrainedSquare:
return height;
break;
default:
return -1;
}
}
Dialog::Dialog(QWidget *parent, Qt::WindowFlags f)
: QWidget(parent, f),
d(new DialogPrivate(this))
{
setAttribute(Qt::WA_TranslucentBackground);
setWindowFlags(Qt::FramelessWindowHint);
d->background = new FrameSvg(this);
d->background->setImagePath("dialogs/background");
d->background->setEnabledBorders(FrameSvg::AllBorders);
d->background->resizeFrame(size());
QPalette pal = palette();
pal.setColor(backgroundRole(), Qt::transparent);
setPalette(pal);
connect(d->background, SIGNAL(repaintNeeded()), this, SLOT(update()));
connect(Plasma::Theme::defaultTheme(), SIGNAL(themeChanged()), this, SLOT(themeChanged()));
d->themeChanged();
setMouseTracking(true);
}
Dialog::~Dialog()
{
delete d;
}
void Dialog::paintEvent(QPaintEvent *e)
{
QPainter p(this);
p.setCompositionMode(QPainter::CompositionMode_Source);
d->background->paintFrame(&p, e->rect(), e->rect());
}
void Dialog::mouseMoveEvent(QMouseEvent *event)
{
if (d->resizeAreas[Dialog::NorthEast].contains(event->pos())) {
setCursor(Qt::SizeBDiagCursor);
} else if (d->resizeAreas[Dialog::NorthWest].contains(event->pos())) {
setCursor(Qt::SizeFDiagCursor);
} else if (d->resizeAreas[Dialog::SouthEast].contains(event->pos())) {
setCursor(Qt::SizeFDiagCursor);
} else if (d->resizeAreas[Dialog::SouthWest].contains(event->pos())) {
setCursor(Qt::SizeBDiagCursor);
} else if (!(event->buttons() & Qt::LeftButton)) {
unsetCursor();
}
// here we take care of resize..
if (d->resizeStartCorner != Dialog::NoCorner) {
int newWidth;
int newHeight;
QPoint position;
qreal aspectRatio = (qreal)width() / (qreal)height();
switch(d->resizeStartCorner) {
case Dialog::NorthEast:
newHeight = qMin(maximumHeight(), qMax(minimumHeight(), height() - event->y()));
newWidth = d->calculateWidthForHeightAndRatio(newHeight, aspectRatio);
if (newWidth == -1) {
newWidth = qMin(maximumWidth(), qMax(minimumWidth(), event->x()));
}
position = QPoint(x(), y() + height() - newHeight);
break;
case Dialog::NorthWest:
newHeight = qMin(maximumHeight(), qMax(minimumHeight(), height() - event->y()));
newWidth = d->calculateWidthForHeightAndRatio(newHeight, aspectRatio);
if (newWidth == -1) {
newWidth = qMin(maximumWidth(), qMax(minimumWidth(), width() - event->x()));
}
position = QPoint(x() + width() - newWidth, y() + height() - newHeight);
break;
case Dialog::SouthWest:
newHeight = qMin(maximumHeight(), qMax(minimumHeight(), event->y()));
newWidth = d->calculateWidthForHeightAndRatio(newHeight, aspectRatio);
if (newWidth == -1) {
newWidth = qMin(maximumWidth(), qMax(minimumWidth(), width() - event->x()));
}
position = QPoint(x() + width() - newWidth, y());
break;
case Dialog::SouthEast:
newHeight = qMin(maximumHeight(), qMax(minimumHeight(), event->y()));
newWidth = d->calculateWidthForHeightAndRatio(newHeight, aspectRatio);
if (newWidth == -1) {
newWidth = qMin(maximumWidth(), qMax(minimumWidth(), event->x()));
}
position = QPoint(x(), y());
break;
default:
newHeight = qMin(maximumHeight(), qMax(minimumHeight(), height()));
newWidth = d->calculateWidthForHeightAndRatio(newHeight, aspectRatio);
if (newWidth == -1) {
newWidth = qMin(maximumWidth(), qMax(minimumWidth(), width()));
}
position = QPoint(x(), y());
break;
}
if ((newWidth >= minimumSize().width()) && (newHeight >= minimumSize().height())) {
setGeometry(QRect(position, QSize(newWidth, newHeight)));
}
}
QWidget::mouseMoveEvent(event);
}
void Dialog::mousePressEvent(QMouseEvent *event)
{
if (d->resizeAreas[Dialog::NorthEast].contains(event->pos())) {
d->resizeStartCorner = Dialog::NorthEast;
} else if (d->resizeAreas[Dialog::NorthWest].contains(event->pos())) {
d->resizeStartCorner = Dialog::NorthWest;
} else if (d->resizeAreas[Dialog::SouthEast].contains(event->pos())) {
d->resizeStartCorner = Dialog::SouthEast;
} else if (d->resizeAreas[Dialog::SouthWest].contains(event->pos())) {
d->resizeStartCorner = Dialog::SouthWest;
} else {
d->resizeStartCorner = Dialog::NoCorner;
}
QWidget::mousePressEvent(event);
}
void Dialog::mouseReleaseEvent(QMouseEvent *event)
{
if (d->resizeStartCorner != Dialog::NoCorner) {
d->resizeStartCorner = Dialog::NoCorner;
unsetCursor();
emit dialogResized();
}
QWidget::mouseReleaseEvent(event);
}
void Dialog::keyPressEvent(QKeyEvent *event)
{
if (event->key() == Qt::Key_Escape) {
hide();
}
}
bool Dialog::event(QEvent *event)
{
if (event->type() == QEvent::Paint) {
QPainter p(this);
p.setCompositionMode(QPainter::CompositionMode_Source);
p.fillRect(rect(), Qt::transparent);
}
return QWidget::event(event);
}
void Dialog::resizeEvent(QResizeEvent *e)
{
d->background->resizeFrame(e->size());
setMask(d->background->mask());
if (d->resizeStartCorner != -1 && d->view && d->graphicsWidget) {
d->graphicsWidget->resize(d->view->size());
QRectF sceneRect(d->graphicsWidget->sceneBoundingRect());
sceneRect.setWidth(qMax(qreal(1), sceneRect.width()));
sceneRect.setHeight(qMax(qreal(1), sceneRect.height()));
d->view->setSceneRect(sceneRect);
d->view->centerOn(d->graphicsWidget);
}
d->updateResizeCorners();
}
void DialogPrivate::updateResizeCorners()
{
const int resizeAreaMargin = 20;
const QRect r = q->rect();
const FrameSvg::EnabledBorders borders = background->enabledBorders();
// IMPLEMENTATION NOTE: we set resize corners for the corners set, but also
// for the complimentary corners if we've cut out an edge of our SVG background
// which implies we are up against an immovable edge (e.g. a screen edge)
resizeAreas.clear();
if (resizeCorners & Dialog::NorthEast ||
(resizeCorners & Dialog::NorthWest && !(borders & FrameSvg::LeftBorder)) ||
(resizeCorners & Dialog::SouthEast && !(borders & FrameSvg::BottomBorder))) {
resizeAreas[Dialog::NorthEast] = QRect(r.right() - resizeAreaMargin, 0,
resizeAreaMargin, resizeAreaMargin);
}
if (resizeCorners & Dialog::NorthWest ||
(resizeCorners & Dialog::NorthEast && !(borders & FrameSvg::RightBorder)) ||
(resizeCorners & Dialog::SouthWest && !(borders & FrameSvg::BottomBorder))) {
resizeAreas[Dialog::NorthWest] = QRect(0, 0, resizeAreaMargin, resizeAreaMargin);
}
if (resizeCorners & Dialog::SouthEast ||
(resizeCorners & Dialog::SouthWest && !(borders & FrameSvg::LeftBorder)) ||
(resizeCorners & Dialog::NorthEast && !(borders & FrameSvg::TopBorder))) {
resizeAreas[Dialog::SouthEast] = QRect(r.right() - resizeAreaMargin,
r.bottom() - resizeAreaMargin,
resizeAreaMargin, resizeAreaMargin);
}
if (resizeCorners & Dialog::SouthWest ||
(resizeCorners & Dialog::SouthEast && !(borders & FrameSvg::RightBorder)) ||
(resizeCorners & Dialog::NorthWest && !(borders & FrameSvg::TopBorder))) {
resizeAreas[Dialog::SouthWest] = QRect(0, r.bottom() - resizeAreaMargin,
resizeAreaMargin, resizeAreaMargin);
}
}
void Dialog::setGraphicsWidget(QGraphicsWidget *widget)
{
if (d->graphicsWidget) {
d->graphicsWidget->removeEventFilter(this);
}
d->graphicsWidget = widget;
if (widget) {
if (!layout()) {
QVBoxLayout *lay = new QVBoxLayout(this);
lay->setMargin(0);
lay->setSpacing(0);
}
d->themeChanged();
if (!d->view) {
d->view = new QGraphicsView(this);
d->view->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
d->view->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
d->view->setFrameShape(QFrame::NoFrame);
d->view->viewport()->setAutoFillBackground(false);
layout()->addWidget(d->view);
}
d->view->setScene(widget->scene());
d->adjustView();
adjustSize();
widget->installEventFilter(this);
} else {
delete d->view;
d->view = 0;
}
}
//BIC FIXME: should be const
QGraphicsWidget *Dialog::graphicsWidget()
{
return d->graphicsWidget;
}
bool Dialog::eventFilter(QObject *watched, QEvent *event)
{
if (d->resizeStartCorner == Dialog::NoCorner && watched == d->graphicsWidget &&
(event->type() == QEvent::GraphicsSceneResize || event->type() == QEvent::GraphicsSceneMove)) {
d->adjustView();
}
return QWidget::eventFilter(watched, event);
}
void Dialog::hideEvent(QHideEvent * event)
{
Q_UNUSED(event);
emit dialogVisible(false);
}
void Dialog::showEvent(QShowEvent * event)
{
Q_UNUSED(event);
//check if the widget size is still synced with the view
d->themeChanged();
d->updateResizeCorners();
if (d->graphicsWidget && d->view && d->graphicsWidget->size().toSize() != d->view->size()) {
d->adjustView();
}
if (d->view) {
d->view->setFocus();
}
if (d->graphicsWidget) {
d->graphicsWidget->setFocus();
}
emit dialogVisible(true);
}
void Dialog::focusInEvent(QFocusEvent *event)
{
Q_UNUSED(event)
if (d->view) {
d->view->setFocus();
}
if (d->graphicsWidget) {
d->graphicsWidget->setFocus();
}
}
void Dialog::moveEvent(QMoveEvent *event)
{
Q_UNUSED(event)
if (!d->moveTimer) {
d->moveTimer = new QTimer(this);
d->moveTimer->setSingleShot(true);
connect(d->moveTimer, SIGNAL(timeout()), this, SLOT(themeChanged()));
}
d->moveTimer->start(200);
}
void Dialog::setResizeHandleCorners(ResizeCorners corners)
{
if ((d->resizeCorners != corners) && (aspectRatioMode() != FixedSize)) {
d->resizeCorners = corners;
d->updateResizeCorners();
}
}
Dialog::ResizeCorners Dialog::resizeCorners() const
{
return d->resizeCorners;
}
void Dialog::animatedHide(Plasma::Direction direction)
{
if (!KWindowSystem::compositingActive()) {
hide();
return;
}
Location location = Desktop;
switch (direction) {
case Down:
location = BottomEdge;
break;
case Right:
location = RightEdge;
break;
case Left:
location = LeftEdge;
break;
case Up:
location = TopEdge;
break;
default:
break;
}
Plasma::WindowEffects::slideWindow(this, location);
hide();
}
void Dialog::animatedShow(Plasma::Direction direction)
{
if (!KWindowSystem::compositingActive()) {
show();
return;
}
//copied to not add new api
Location location = Desktop;
switch (direction) {
case Up:
location = BottomEdge;
break;
case Left:
location = RightEdge;
break;
case Right:
location = LeftEdge;
break;
case Down:
location = TopEdge;
break;
default:
break;
}
if (KWindowSystem::compositingActive()) {
Plasma::WindowEffects::slideWindow(this, location);
}
show();
}
bool Dialog::inControlArea(const QPoint &point)
{
foreach (const QRect &r, d->resizeAreas) {
if (r.contains(point)) {
return true;
}
}
return false;
}
Plasma::AspectRatioMode Dialog::aspectRatioMode() const
{
return d->aspectRatioMode;
}
void Dialog::setAspectRatioMode(Plasma::AspectRatioMode mode)
{
if (mode == FixedSize) {
setResizeHandleCorners(NoCorner);
}
d->aspectRatioMode = mode;
}
}
#include "dialog.moc"