295 lines
7.4 KiB
C++
295 lines
7.4 KiB
C++
/*
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* Copyright 2007 by Dan Meltzer <hydrogen@notyetimplemented.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "tooltip_p.h"
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#include <QBitmap>
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#include <QHBoxLayout>
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#include <QLabel>
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#include <QMouseEvent>
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#include <QPixmap>
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#include <QTimer>
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#include <QGraphicsView>
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#include <QX11Info>
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#include <kglobal.h>
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#include <kwindowsystem.h>
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#include <X11/Xlib.h>
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#include <fixx11h.h>
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#include "plasma/plasma.h"
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namespace Plasma {
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class ToolTip::Private
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{
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public:
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Private()
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: label(0)
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, imageLabel(0)
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, preview(0)
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, windowToPreview(0)
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, currentWidget(0)
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, isShown(false)
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, showTimer(0)
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, hideTimer(0)
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{ }
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QLabel *label;
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QLabel *imageLabel;
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WindowPreview *preview;
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WId windowToPreview;
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Plasma::Widget *currentWidget;
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bool isShown;
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QTimer *showTimer;
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QTimer *hideTimer;
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};
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class ToolTipSingleton
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{
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public:
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ToolTip self;
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};
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K_GLOBAL_STATIC( ToolTipSingleton, privateInstance )
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ToolTip *ToolTip::self()
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{
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return &privateInstance->self;
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}
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void ToolTip::show(const QPoint &location, Plasma::Widget *widget)
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{
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d->currentWidget = widget;
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setData(widget->toolTip());
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move(location.x(), location.y() - sizeHint().height());
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if (d->isShown) {
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// Don't delay if the tooltip is already shown(i.e. moving from one task to another)
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// Qt doesn't seem to like visible tooltips moving though, so hide it and then
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// immediately show it again
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setVisible(false);
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// small delay to prevent unecessary showing when the mouse is moving quickly across items
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// which can be too much for less powerful CPUs to keep up with
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d->showTimer->start(150);
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} else {
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d->showTimer->start(500);
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}
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}
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void ToolTip::hide()
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{
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d->currentWidget = 0;
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d->showTimer->stop(); //Mouse out, stop the timer to show the tooltip
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setVisible(false);
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d->hideTimer->start(250); //500 ms delay before we are officially "gone" to allow for the time to move between widgets
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}
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Plasma::Widget *ToolTip::currentWidget() const
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{
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return d->currentWidget;
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}
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//PRIVATE FUNCTIONS
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void ToolTip::slotShowToolTip()
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{
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QGraphicsView *v = d->currentWidget->view();
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if (v && v->mouseGrabber()) {
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return;
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}
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if( d->windowToPreview != 0 ) {
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// show/hide the preview area
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d->preview->show();
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} else {
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d->preview->hide();
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}
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layout()->activate();
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d->isShown = true; //ToolTip is visible
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setVisible(true);
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}
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void ToolTip::slotResetTimer()
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{
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if (!isVisible()) { //One might have moused out and back in again
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d->isShown = false;
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}
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}
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void ToolTip::showEvent(QShowEvent *e)
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{
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QWidget::showEvent(e);
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d->preview->setInfo();
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}
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void ToolTip::mouseReleaseEvent(QMouseEvent* event)
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{
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if (rect().contains(event->pos())) {
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hide();
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}
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}
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ToolTip::ToolTip()
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: QWidget(0)
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, d( new Private )
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{
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setWindowFlags(Qt::ToolTip);
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QGridLayout *l = new QGridLayout;
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d->preview = new WindowPreview;
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d->label = new QLabel;
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d->label->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Minimum);
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d->label->setWordWrap(true);
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d->imageLabel = new QLabel;
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d->imageLabel->setAlignment(Qt::AlignTop | Qt::AlignLeft);
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l->addWidget(d->preview, 0, 0, 1, 2);
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l->addWidget(d->imageLabel, 1, 0);
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l->addWidget(d->label, 1, 1);
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setLayout(l);
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d->showTimer = new QTimer(this);
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d->showTimer->setSingleShot(true);
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d->hideTimer = new QTimer(this);
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d->hideTimer->setSingleShot(true);
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connect(d->showTimer, SIGNAL(timeout()), SLOT(slotShowToolTip()));
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connect(d->hideTimer, SIGNAL(timeout()), SLOT(slotResetTimer()));
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}
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void ToolTip::setData(const Plasma::ToolTipData &data)
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{
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d->label->setText("<qt><b>" + data.mainText + "</b><br>" +
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data.subText + "</qt>");
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d->imageLabel->setPixmap(data.image);
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d->windowToPreview = data.windowToPreview;
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d->preview->setWindowId( d->windowToPreview );
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}
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ToolTip::~ToolTip()
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{
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delete d;
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}
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// A widget which reserves area for window preview and sets hints on the toplevel
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// tooltip widget that tells KWin to render the preview in this area. This depends
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// on KWin's TaskbarThumbnail compositing effect (which is here detected).
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void WindowPreview::setWindowId(WId w)
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{
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if (!previewsAvailable()) {
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id = 0;
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return;
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}
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id = w;
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windowSize = QSize();
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}
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bool WindowPreview::previewsAvailable() const
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{
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if (!KWindowSystem::compositingActive()) {
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return false;
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}
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// hackish way to find out if KWin has the effect enabled,
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// TODO provide proper support
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Display* dpy = QX11Info::display();
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Atom atom = XInternAtom(dpy, "_KDE_WINDOW_PREVIEW", False);
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int cnt;
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Atom* list = XListProperties(dpy, DefaultRootWindow( dpy ), &cnt);
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if (list != NULL) {
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bool ret = ( qFind(list, list + cnt, atom) != list + cnt );
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XFree(list);
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return ret;
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}
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return false;
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}
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QSize WindowPreview::sizeHint() const
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{
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if (id == 0) {
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return QSize();
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}
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if (!windowSize.isValid()) {
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readWindowSize();
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}
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QSize s = windowSize;
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s.scale(200, 150, Qt::KeepAspectRatio);
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return s;
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}
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void WindowPreview::readWindowSize() const
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{
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Window r;
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int x, y;
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unsigned int w, h, b, d;
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if (XGetGeometry(QX11Info::display(), id, &r, &x, &y, &w, &h, &b, &d)) {
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windowSize = QSize( w, h );
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} else {
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windowSize = QSize();
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}
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}
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void WindowPreview::setInfo()
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{
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Display *dpy = QX11Info::display();
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Atom atom = XInternAtom(dpy, "_KDE_WINDOW_PREVIEW", False);
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if (id == 0) {
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XDeleteProperty(dpy, winId(), atom);
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return;
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}
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if (!windowSize.isValid()) {
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readWindowSize();
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}
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if (!windowSize.isValid()) {
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XDeleteProperty(dpy, winId(), atom);
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return;
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}
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Q_ASSERT( parentWidget()->isWindow()); // parent must be toplevel
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long data[] = { 1, 5, id, x(), y(), width(), height() };
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XChangeProperty(dpy, parentWidget()->winId(), atom, atom, 32, PropModeReplace,
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reinterpret_cast< unsigned char* >( data ), sizeof( data ) / sizeof( data[ 0 ] ));
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}
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void ToolTip::resizeEvent(QResizeEvent *)
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{
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QBitmap mask(width(), height());
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QPainter painter(&mask);
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mask.fill(Qt::white);
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painter.setBrush(Qt::black);
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painter.setPen(Qt::black);
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painter.drawPath(roundedRectangle(mask.rect(), 10));
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setMask(mask);
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}
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void ToolTip::paintEvent(QPaintEvent *)
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{
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QPainter painter(this);
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painter.setRenderHint(QPainter::Antialiasing);
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//Stroke border
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painter.setPen(palette().dark().color());
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painter.drawPath(roundedRectangle(rect(), 10));
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}
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}
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#include "tooltip_p.moc"
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