kwin/effects/thumbnailaside/thumbnailaside.cpp
Vlad Zahorodnii 1fb9f6f13a Switch to SPDX license markers
The main advantage of SPDX license identifiers over the traditional
license headers is that it's more difficult to overlook inappropriate
licenses for kwin, for example GPL 3. We also don't have to copy a
lot of boilerplate text.

In order to create this change, I ran licensedigger -r -c from the
toplevel source directory.
2020-08-07 19:57:56 +00:00

185 lines
5.7 KiB
C++

/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
SPDX-FileCopyrightText: 2007 Lubos Lunak <l.lunak@kde.org>
SPDX-FileCopyrightText: 2007 Christian Nitschkowski <christian.nitschkowski@kdemail.net>
SPDX-License-Identifier: GPL-2.0-or-later
*********************************************************************/
#include "thumbnailaside.h"
// KConfigSkeleton
#include "thumbnailasideconfig.h"
#include <KGlobalAccel>
#include <KLocalizedString>
#include <QAction>
#include <QMatrix4x4>
namespace KWin
{
ThumbnailAsideEffect::ThumbnailAsideEffect()
{
initConfig<ThumbnailAsideConfig>();
QAction* a = new QAction(this);
a->setObjectName(QStringLiteral("ToggleCurrentThumbnail"));
a->setText(i18n("Toggle Thumbnail for Current Window"));
KGlobalAccel::self()->setDefaultShortcut(a, QList<QKeySequence>() << Qt::META + Qt::CTRL + Qt::Key_T);
KGlobalAccel::self()->setShortcut(a, QList<QKeySequence>() << Qt::META + Qt::CTRL + Qt::Key_T);
effects->registerGlobalShortcut(Qt::META + Qt::CTRL + Qt::Key_T, a);
connect(a, &QAction::triggered, this, &ThumbnailAsideEffect::toggleCurrentThumbnail);
connect(effects, &EffectsHandler::windowClosed, this, &ThumbnailAsideEffect::slotWindowClosed);
connect(effects, &EffectsHandler::windowFrameGeometryChanged, this, &ThumbnailAsideEffect::slotWindowFrameGeometryChanged);
connect(effects, &EffectsHandler::windowDamaged, this, &ThumbnailAsideEffect::slotWindowDamaged);
connect(effects, &EffectsHandler::screenLockingChanged, this, &ThumbnailAsideEffect::repaintAll);
reconfigure(ReconfigureAll);
}
void ThumbnailAsideEffect::reconfigure(ReconfigureFlags)
{
ThumbnailAsideConfig::self()->read();
maxwidth = ThumbnailAsideConfig::maxWidth();
spacing = ThumbnailAsideConfig::spacing();
opacity = ThumbnailAsideConfig::opacity()/100.0;
screen = ThumbnailAsideConfig::screen(); // Xinerama screen TODO add gui option
arrange();
}
void ThumbnailAsideEffect::paintScreen(int mask, const QRegion &region, ScreenPaintData& data)
{
painted = QRegion();
effects->paintScreen(mask, region, data);
const QMatrix4x4 projectionMatrix = data.projectionMatrix();
foreach (const Data & d, windows) {
if (painted.intersects(d.rect)) {
WindowPaintData data(d.window, projectionMatrix);
data.multiplyOpacity(opacity);
QRect region;
setPositionTransformations(data, region, d.window, d.rect, Qt::KeepAspectRatio);
effects->drawWindow(d.window, PAINT_WINDOW_OPAQUE | PAINT_WINDOW_TRANSLUCENT | PAINT_WINDOW_TRANSFORMED | PAINT_WINDOW_LANCZOS,
region, data);
}
}
}
void ThumbnailAsideEffect::paintWindow(EffectWindow *w, int mask, QRegion region, WindowPaintData &data)
{
effects->paintWindow(w, mask, region, data);
painted |= region;
}
void ThumbnailAsideEffect::slotWindowDamaged(EffectWindow* w, const QRect&)
{
foreach (const Data & d, windows) {
if (d.window == w)
effects->addRepaint(d.rect);
}
}
void ThumbnailAsideEffect::slotWindowFrameGeometryChanged(EffectWindow* w, const QRect& old)
{
foreach (const Data & d, windows) {
if (d.window == w) {
if (w->size() == old.size())
effects->addRepaint(d.rect);
else
arrange();
return;
}
}
}
void ThumbnailAsideEffect::slotWindowClosed(EffectWindow* w)
{
removeThumbnail(w);
}
void ThumbnailAsideEffect::toggleCurrentThumbnail()
{
EffectWindow* active = effects->activeWindow();
if (active == nullptr)
return;
if (windows.contains(active))
removeThumbnail(active);
else
addThumbnail(active);
}
void ThumbnailAsideEffect::addThumbnail(EffectWindow* w)
{
repaintAll(); // repaint old areas
Data d;
d.window = w;
d.index = windows.count();
windows[ w ] = d;
arrange();
}
void ThumbnailAsideEffect::removeThumbnail(EffectWindow* w)
{
if (!windows.contains(w))
return;
repaintAll(); // repaint old areas
int index = windows[ w ].index;
windows.remove(w);
for (QHash< EffectWindow*, Data >::Iterator it = windows.begin();
it != windows.end();
++it) {
Data& d = *it;
if (d.index > index)
--d.index;
}
arrange();
}
void ThumbnailAsideEffect::arrange()
{
if (windows.size() == 0)
return;
int height = 0;
QVector< int > pos(windows.size());
int mwidth = 0;
foreach (const Data & d, windows) {
height += d.window->height();
mwidth = qMax(mwidth, d.window->width());
pos[ d.index ] = d.window->height();
}
QRect area = effects->clientArea(MaximizeArea, screen, effects->currentDesktop());
double scale = area.height() / double(height);
scale = qMin(scale, maxwidth / double(mwidth)); // don't be wider than maxwidth pixels
int add = 0;
for (int i = 0;
i < windows.size();
++i) {
pos[ i ] = int(pos[ i ] * scale);
pos[ i ] += spacing + add; // compute offset of each item
add = pos[ i ];
}
for (QHash< EffectWindow*, Data >::Iterator it = windows.begin();
it != windows.end();
++it) {
Data& d = *it;
int width = int(d.window->width() * scale);
d.rect = QRect(area.right() - width, area.bottom() - pos[ d.index ], width, int(d.window->height() * scale));
}
repaintAll();
}
void ThumbnailAsideEffect::repaintAll()
{
foreach (const Data & d, windows)
effects->addRepaint(d.rect);
}
bool ThumbnailAsideEffect::isActive() const
{
return !windows.isEmpty() && !effects->isScreenLocked();
}
} // namespace