plasma-framework/dialog.cpp
Alessandro Diaferia ca0a7d962f added support for resizing
svn path=/trunk/KDE/kdebase/workspace/libs/plasma/; revision=858269
2008-09-07 16:55:37 +00:00

345 lines
10 KiB
C++

/***************************************************************************
* Copyright (C) 2008 by Alessandro Diaferia <alediaferia@gmail.com> *
* Copyright (C) 2007 by Alexis Ménard <darktears31@gmail.com> *
* Copyright (C) 2007 Sebastian Kuegler <sebas@kde.org> *
* Copyright (C) 2006 Aaron Seigo <aseigo@kde.org> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, 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 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 "dialog.h"
#include <QPainter>
#include <QSvgRenderer>
#include <QResizeEvent>
#include <QMouseEvent>
#ifdef Q_WS_X11
#include <QX11Info>
#endif
#include <QBitmap>
#include <QtGui/QVBoxLayout>
#include <QtGui/QGraphicsSceneEvent>
#include <QtGui/QGraphicsView>
#include <QtGui/QGraphicsWidget>
#include <KDebug>
#include <NETRootInfo>
#include <plasma/panelsvg.h>
#include <plasma/theme.h>
#ifdef Q_WS_X11
#include <X11/Xlib.h>
#endif
const int resizeAreaMargin = 20;
namespace Plasma
{
class DialogPrivate
{
public:
DialogPrivate(Dialog *dialog)
: q(dialog),
background(0),
view(0),
widget(0),
resizeCorners(Dialog::NoCorner)
{
}
~DialogPrivate()
{
}
void themeUpdated();
void adjustView();
Plasma::Dialog *q;
/**
* Holds the background SVG, to be re-rendered when the cache is invalidated,
* for example by resizing the dialogue.
*/
Plasma::PanelSvg *background;
QGraphicsView *view;
QGraphicsWidget *widget;
Dialog::ResizeCorners resizeCorners;
QMap<Dialog::ResizeCorner, QRect> resizeAreas;
Dialog::ResizeCorner resizeStartCorner;
};
void DialogPrivate::themeUpdated()
{
const int topHeight = background->marginSize(Plasma::TopMargin);
const int leftWidth = background->marginSize(Plasma::LeftMargin);
const int rightWidth = background->marginSize(Plasma::RightMargin);
const int bottomHeight = background->marginSize(Plasma::BottomMargin);
q->setContentsMargins(leftWidth, topHeight, rightWidth, bottomHeight);
}
void DialogPrivate::adjustView()
{
if (view && widget) {
kDebug() << "resize the view.";
QSize prevSize = q->size();
//reposition and resize the view.
view->setSceneRect(widget->mapToScene(widget->boundingRect()).boundingRect());
view->resize(widget->size().toSize());
view->centerOn(widget);
//set the sizehints correctly:
int left, top, right, bottom;
q->getContentsMargins(&left, &top, &right, &bottom);
q->setMinimumSize(view->size().width() + left + right,
view->size().height() + top + bottom);
q->setMaximumSize(view->size().width() + left + right,
view->size().height() + top + bottom);
q->updateGeometry();
if (q->size() != prevSize) {
//the size of the dialog has changed, emit the signal:
emit q->dialogResized();
}
}
}
Dialog::Dialog( QWidget * parent, Qt::WindowFlags f )
: QWidget(parent, f),
d(new DialogPrivate(this))
{
d->background = new PanelSvg(this);
d->background->setImagePath("dialogs/background");
d->background->setEnabledBorders(PanelSvg::AllBorders);
d->background->resizePanel(size());
connect(d->background, SIGNAL(repaintNeeded()), this, SLOT(update()));
connect(Plasma::Theme::defaultTheme(), SIGNAL(themeChanged()), this, SLOT(themeUpdated()));
d->themeUpdated();
setMouseTracking(true);
}
Dialog::~Dialog()
{
delete d;
}
void Dialog::paintEvent(QPaintEvent *e)
{
QPainter p(this);
p.setRenderHint(QPainter::Antialiasing);
p.setClipRect(e->rect());
p.setCompositionMode(QPainter::CompositionMode_Source );
p.fillRect(rect(), Qt::transparent);
d->background->paintPanel(&p);
//we set the resize handlers
d->resizeAreas.clear();
d->resizeAreas[Dialog::NorthEast] = QRect(rect().right() - resizeAreaMargin, 0,
resizeAreaMargin, resizeAreaMargin);
d->resizeAreas[Dialog::NorthWest] = QRect(0,0, resizeAreaMargin, resizeAreaMargin);
d->resizeAreas[Dialog::SouthEast] = QRect(rect().right() - resizeAreaMargin,
rect().bottom() - resizeAreaMargin,
resizeAreaMargin, resizeAreaMargin);
d->resizeAreas[Dialog::SouthWest] = QRect(0, rect().bottom() - resizeAreaMargin,
resizeAreaMargin, resizeAreaMargin);
}
void Dialog::mouseMoveEvent(QMouseEvent *event)
{
if (d->resizeAreas[Dialog::NorthEast].contains(event->pos()) && d->resizeCorners & Dialog::NorthEast) {
setCursor(Qt::SizeBDiagCursor);
} else if (d->resizeAreas[Dialog::NorthWest].contains(event->pos()) && d->resizeCorners & Dialog::NorthWest) {
setCursor(Qt::SizeFDiagCursor);
} else if (d->resizeAreas[Dialog::SouthEast].contains(event->pos()) && d->resizeCorners & Dialog::SouthEast) {
setCursor(Qt::SizeFDiagCursor);
} else if (d->resizeAreas[Dialog::SouthWest].contains(event->pos()) && d->resizeCorners & Dialog::SouthWest) {
setCursor(Qt::SizeBDiagCursor);
} else {
unsetCursor();
}
// here we take care of resize..
if (d->resizeStartCorner != Dialog::NoCorner ) {
int newWidth;
int newHeight;
QPoint position;
switch(d->resizeStartCorner) {
case Dialog::NorthEast:
newWidth = event->x();
newHeight = height() - event->y();
position = QPoint(x(), y() + height() - newHeight);
break;
case Dialog::NorthWest:
newWidth = width() - event->x();
newHeight = height() - event->y();
position = QPoint(x() + width() - newWidth, y() + height() - newHeight);
break;
case Dialog::SouthWest:
newWidth = width() - event->x();
newHeight = event->y();
position = QPoint(x() + width() - newWidth, y());
break;
case Dialog::SouthEast:
newWidth = event->x();
newHeight = event->y();
position = QPoint(x(), y());
break;
default:
newWidth = width();
newHeight = height();
position = QPoint(x(), y());
break;
}
// let's check for limitations
if (newWidth < minimumWidth() || newWidth > maximumWidth()) {
newWidth = width();
position.setX(x());
}
if (newHeight < minimumHeight() || newHeight > maximumHeight()) {
newHeight = height();
position.setY(y());
}
setGeometry(QRect(position, QSize(newWidth, newHeight)));
}
QWidget::mouseMoveEvent(event);
}
void Dialog::mousePressEvent(QMouseEvent *event)
{
if (d->resizeAreas[Dialog::NorthEast].contains(event->pos()) && d->resizeCorners & Dialog::NorthEast) {
d->resizeStartCorner = Dialog::NorthEast;
} else if (d->resizeAreas[Dialog::NorthWest].contains(event->pos()) && d->resizeCorners & Dialog::NorthWest) {
d->resizeStartCorner = Dialog::NorthWest;
} else if (d->resizeAreas[Dialog::SouthEast].contains(event->pos()) && d->resizeCorners & Dialog::SouthEast) {
d->resizeStartCorner = Dialog::SouthEast;
} else if (d->resizeAreas[Dialog::SouthWest].contains(event->pos()) && d->resizeCorners & Dialog::SouthWest) {
d->resizeStartCorner = Dialog::SouthWest;
} else {
d->resizeStartCorner = Dialog::NoCorner;
}
QWidget::mousePressEvent(event);
}
void Dialog::mouseReleaseEvent(QMouseEvent *event)
{
d->resizeStartCorner = Dialog::NoCorner;
QWidget::mouseReleaseEvent(event);
}
void Dialog::resizeEvent(QResizeEvent *e)
{
d->background->resizePanel(e->size());
setMask(d->background->mask());
}
void Dialog::setGraphicsWidget(QGraphicsWidget *widget)
{
if (d->widget) {
d->widget->removeEventFilter(this);
}
d->widget = widget;
if (widget) {
if (!layout()) {
QVBoxLayout *lay = new QVBoxLayout(this);
lay->setMargin(0);
lay->setSpacing(0);
}
if (!d->view) {
d->view = new QGraphicsView(this);
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;
}
}
QGraphicsWidget *Dialog::graphicsWidget()
{
return d->widget;
}
bool Dialog::eventFilter(QObject *watched, QEvent *event)
{
if (watched == d->widget && (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);
emit dialogVisible(true);
}
void Dialog::setResizeHandleCorners(ResizeCorners corners)
{
d->resizeCorners = corners;
update();
}
Dialog::ResizeCorners Dialog::resizeCorners() const
{
return d->resizeCorners;
}
}
#include "dialog.moc"