plasma-framework/plasma/private/windowpreview.cpp
2013-01-30 13:43:33 +01:00

228 lines
5.9 KiB
C++

/*
* Copyright 2007 by Dan Meltzer <hydrogen@notyetimplemented.com>
* Copyright (C) 2008 by Alexis Ménard <darktears31@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 "windowpreview_p.h"
#include <QPainter>
#include <QVarLengthArray>
#include <QMouseEvent>
#include <kwindoweffects.h>
#include <kwindowsystem.h>
#include <kdebug.h>
#include <plasma/framesvg.h>
namespace Plasma {
WindowPreview::WindowPreview(QWidget *parent)
: QWidget(parent),
m_highlightWindows(false)
{
m_background = new Plasma::FrameSvg(this);
m_background->setImagePath("widgets/frame");
m_background->setElementPrefix("raised");
setMouseTracking(true);
}
void WindowPreview::setWindowIds(const QList<WId> wids)
{
if (!KWindowEffects::isEffectAvailable(KWindowEffects::WindowPreview)) {
setMinimumSize(0,0);
setMaximumSize(QWIDGETSIZE_MAX, QWIDGETSIZE_MAX);
ids.clear();
return;
}
//FIXME: need to get rid of this 4 window maximum by using a smarter layout
if (wids.count() < 5) {
ids = wids;
} else {
ids = wids.mid(0, 4);
}
windowSizes = KWindowEffects::windowSizes(ids);
QSize s(sizeHint());
if (s.isValid()) {
setFixedSize(sizeHint());
}
}
QList<WId> WindowPreview::windowIds() const
{
return ids;
}
QSize WindowPreview::sizeHint() const
{
if (ids.size() == 0) {
return QSize();
}
if (!windowSizes.size() == 0) {
windowSizes = KWindowEffects::windowSizes(ids);
}
int maxHeight = 0;
int totalWidth = 0;
foreach (const QSize &s, windowSizes) {
if (s.height() > maxHeight) {
maxHeight = s.height();
}
totalWidth += s.width();
}
QSize s(totalWidth, maxHeight);
qreal left, top, right, bottom;
m_background->getMargins(left, top, right, bottom);
s.scale(WINDOW_WIDTH*windowSizes.size(), WINDOW_HEIGHT, Qt::KeepAspectRatio);
s = s + QSize(left+right+WINDOW_MARGIN*(windowSizes.size()-1), top+bottom);
return s;
}
bool WindowPreview::isEmpty() const
{
foreach (WId id, ids) {
if (id != 0) {
return false;
}
}
return true;
}
void WindowPreview::setHighlightWindows(const bool highlight)
{
m_highlightWindows = highlight;
}
bool WindowPreview::highlightWindows() const
{
return m_highlightWindows;
}
void WindowPreview::setInfo()
{
QWidget *w = parentWidget();
if (isEmpty()) {
KWindowEffects::showWindowThumbnails(w->winId());
return;
}
if (windowSizes.size() == 0) {
windowSizes = KWindowEffects::windowSizes(ids);
}
if (windowSizes.size() == 0) {
KWindowEffects::showWindowThumbnails(w->winId());
return;
}
Q_ASSERT(w->isWindow()); // parent must be toplevel
QSize thumbnailSize = sizeHint();
thumbnailSize.scale(size(), Qt::KeepAspectRatio);
m_background->resizeFrame(thumbnailSize);
qreal left, top, right, bottom;
m_background->getMargins(left, top, right, bottom);
const QRect thumbnailRect(QPoint(left, top), size() - QSize(left + right, top + bottom));
const int numWindows = ids.size();
const qreal thumbWidth = (thumbnailRect.width() - WINDOW_MARGIN*(numWindows - 1)) / numWindows;
// we paint in parent coords, but accept events in local coords
QList<QRect> inParentCoords;
m_thumbnailRects.clear();
int x = thumbnailRect.x();
foreach (QSize s, windowSizes) {
s.scale(thumbWidth, thumbnailRect.height(), Qt::KeepAspectRatio);
int y = thumbnailRect.y() + (thumbnailRect.height() - s.height())/2;
m_thumbnailRects.append(QRect(QPoint(x, y), s));
inParentCoords.append(QRect(mapToParent(QPoint(x, y)), s));
x += s.width() + WINDOW_MARGIN;
}
KWindowEffects::showWindowThumbnails(w->winId(), ids, inParentCoords);
}
void WindowPreview::paintEvent(QPaintEvent *e)
{
Q_UNUSED(e)
QPainter painter(this);
qreal left, top, right, bottom;
m_background->getMargins(left, top, right, bottom);
const QSize delta(left + right, top + bottom);
const QPoint topLeft(left, top);
foreach (const QRect &r, m_thumbnailRects) {
//kWarning()<<r;
m_background->resizeFrame(r.size() + delta);
m_background->paintFrame(&painter, r.topLeft() - topLeft);
}
}
void WindowPreview::mousePressEvent(QMouseEvent *event)
{
for (int i = 0; i < m_thumbnailRects.size(); ++i) {
if (m_thumbnailRects[i].contains(event->pos())) {
emit windowPreviewClicked(ids[i], event->buttons(), event->modifiers(), event->globalPos());
return;
}
}
}
void WindowPreview::mouseMoveEvent(QMouseEvent *event)
{
if (!m_highlightWindows) {
return;
}
for (int i = 0; i < m_thumbnailRects.size(); ++i) {
if (m_thumbnailRects[i].contains(event->pos())) {
KWindowEffects::highlightWindows(effectiveWinId(), QList<WId>() << effectiveWinId() << ids[i]);
return;
}
}
KWindowEffects::highlightWindows(effectiveWinId(), QList<WId>());
}
void WindowPreview::leaveEvent(QEvent *event)
{
Q_UNUSED(event)
if (!m_highlightWindows) {
return;
}
KWindowEffects::highlightWindows(effectiveWinId(), QList<WId>());
}
} // namespace Plasma
#include "moc_windowpreview_p.cpp"