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kwin/effects/flipswitch/flipswitch.cpp
Vlad Zahorodnii 9f2cb0ae1b Provide expected presentation time to effects 
Effects are given the interval between two consecutive frames. The main
flaw of this approach is that if the Compositor transitions from the idle
state to "active" state, i.e. when there is something to repaint,
effects may see a very large interval between the last painted frame and
the current. In order to address this issue, the Scene invalidates the
timer that is used to measure time between consecutive frames before the
Compositor is about to become idle.

While this works perfectly fine with Xinerama-style rendering, with per
screen rendering, determining whether the compositor is about to idle is
rather a tedious task mostly because a single output can't be used for
the test.

Furthermore, since the Compositor schedules pointless repaints just to
ensure that it's idle, it might take several attempts to figure out
whether the scene timer must be invalidated if you use (true) per screen
rendering.

Ideally, all effects should use a timeline helper that is aware of the
underlying render loop and its timings. However, this option is off the
table because it will involve a lot of work to implement it.

Alternative and much simpler option is to pass the expected presentation
time to effects rather than time between consecutive frames. This means
that effects are responsible for determining how much animation timelines
have to be advanced. Typically, an effect would have to store the
presentation timestamp provided in either prePaint{Screen,Window} and
use it in the subsequent prePaint{Screen,Window} call to estimate the
amount of time passed between the next and the last frames.

Unfortunately, this is an API incompatible change. However, it shouldn't
take a lot of work to port third-party binary effects, which don't use the
AnimationEffect class, to the new API. On the bright side, we no longer
need to be concerned about the Compositor getting idle.

We do still try to determine whether the Compositor is about to idle,
primarily, because the OpenGL render backend swaps buffers on present,
but that will change with the ongoing compositing timing rework.
2020-12-10 07:14:42 +00:00

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/*
KWin - the KDE window manager
This file is part of the KDE project.
SPDX-FileCopyrightText: 2008, 2009 Martin Gräßlin <mgraesslin@kde.org>
SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "flipswitch.h"
// KConfigSkeleton
#include "flipswitchconfig.h"
#include <QAction>
#include <kwinconfig.h>
#include <QKeyEvent>
#include <KGlobalAccel>
#include <KLocalizedString>
#include <kwinglutils.h>
#include <cmath>
namespace KWin
{
FlipSwitchEffect::FlipSwitchEffect()
: m_selectedWindow(nullptr)
, m_currentAnimationEasingCurve(QEasingCurve::InOutSine)
, m_lastPresentTime(std::chrono::milliseconds::zero())
, m_active(false)
, m_start(false)
, m_stop(false)
, m_animation(false)
, m_hasKeyboardGrab(false)
, m_captionFrame(nullptr)
{
initConfig<FlipSwitchConfig>();
reconfigure(ReconfigureAll);
// Caption frame
m_captionFont.setBold(true);
m_captionFont.setPointSize(m_captionFont.pointSize() * 2);
QAction* flipSwitchCurrentAction = new QAction(this);
flipSwitchCurrentAction->setObjectName(QStringLiteral("FlipSwitchCurrent"));
flipSwitchCurrentAction->setText(i18n("Toggle Flip Switch (Current desktop)"));
KGlobalAccel::self()->setShortcut(flipSwitchCurrentAction, QList<QKeySequence>());
m_shortcutCurrent = KGlobalAccel::self()->shortcut(flipSwitchCurrentAction);
effects->registerGlobalShortcut(QKeySequence(), flipSwitchCurrentAction);
connect(flipSwitchCurrentAction, &QAction::triggered, this, &FlipSwitchEffect::toggleActiveCurrent);
QAction* flipSwitchAllAction = new QAction(this);
flipSwitchAllAction->setObjectName(QStringLiteral("FlipSwitchAll"));
flipSwitchAllAction->setText(i18n("Toggle Flip Switch (All desktops)"));
KGlobalAccel::self()->setShortcut(flipSwitchAllAction, QList<QKeySequence>());
effects->registerGlobalShortcut(QKeySequence(), flipSwitchAllAction);
m_shortcutAll = KGlobalAccel::self()->shortcut(flipSwitchAllAction);
connect(flipSwitchAllAction, &QAction::triggered, this, &FlipSwitchEffect::toggleActiveAllDesktops);
connect(KGlobalAccel::self(), &KGlobalAccel::globalShortcutChanged, this, &FlipSwitchEffect::globalShortcutChanged);
connect(effects, &EffectsHandler::windowAdded, this, &FlipSwitchEffect::slotWindowAdded);
connect(effects, &EffectsHandler::windowClosed, this, &FlipSwitchEffect::slotWindowClosed);
connect(effects, &EffectsHandler::tabBoxAdded, this, &FlipSwitchEffect::slotTabBoxAdded);
connect(effects, &EffectsHandler::tabBoxClosed, this, &FlipSwitchEffect::slotTabBoxClosed);
connect(effects, &EffectsHandler::tabBoxUpdated, this, &FlipSwitchEffect::slotTabBoxUpdated);
connect(effects, &EffectsHandler::tabBoxKeyEvent, this, &FlipSwitchEffect::slotTabBoxKeyEvent);
connect(effects, &EffectsHandler::screenAboutToLock, this, [this]() {
setActive(false, AllDesktopsMode);
setActive(false, CurrentDesktopMode);
});
}
FlipSwitchEffect::~FlipSwitchEffect()
{
delete m_captionFrame;
}
bool FlipSwitchEffect::supported()
{
return effects->isOpenGLCompositing() && effects->animationsSupported();
}
void FlipSwitchEffect::reconfigure(ReconfigureFlags)
{
FlipSwitchConfig::self()->read();
m_tabbox = FlipSwitchConfig::tabBox();
m_tabboxAlternative = FlipSwitchConfig::tabBoxAlternative();
const int duration = animationTime<FlipSwitchConfig>(200);
m_timeLine.setDuration(duration);
m_startStopTimeLine.setDuration(duration);
m_angle = FlipSwitchConfig::angle();
m_xPosition = FlipSwitchConfig::xPosition() / 100.0f;
m_yPosition = FlipSwitchConfig::yPosition() / 100.0f;
m_windowTitle = FlipSwitchConfig::windowTitle();
}
void FlipSwitchEffect::prePaintScreen(ScreenPrePaintData& data, std::chrono::milliseconds presentTime)
{
int time = 0;
if (m_lastPresentTime.count()) {
time = (presentTime - m_lastPresentTime).count();
}
m_lastPresentTime = presentTime;
if (m_active) {
data.mask |= PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS;
if (m_start)
m_startStopTimeLine.setCurrentTime(m_startStopTimeLine.currentTime() + time);
if (m_stop && m_scheduledDirections.isEmpty())
m_startStopTimeLine.setCurrentTime(m_startStopTimeLine.currentTime() - time);
if (m_animation)
m_timeLine.setCurrentTime(m_timeLine.currentTime() + time);
}
effects->prePaintScreen(data, presentTime);
}
void FlipSwitchEffect::paintScreen(int mask, const QRegion &region, ScreenPaintData& data)
{
effects->paintScreen(mask, region, data);
if (m_active) {
EffectWindowList tempList;
if (m_mode == TabboxMode)
tempList = effects->currentTabBoxWindowList();
else {
// we have to setup the list
// using stacking order directly is not possible
// as not each window in stacking order is shown
// TODO: store list instead of calculating in each frame?
foreach (EffectWindow * w, effects->stackingOrder()) {
if (m_windows.contains(w))
tempList.append(w);
}
}
m_flipOrderedWindows.clear();
int index = tempList.indexOf(m_selectedWindow);
int tabIndex = index;
if (m_mode == TabboxMode) {
foreach (SwitchingDirection direction, m_scheduledDirections) { // krazy:exclude=foreach
if (direction == DirectionBackward)
index++;
else
index--;
if (index < 0)
index = tempList.count() + index;
if (index >= tempList.count())
index = index % tempList.count();
}
tabIndex = index;
EffectWindow* w = nullptr;
if (!m_scheduledDirections.isEmpty() && m_scheduledDirections.head() == DirectionBackward) {
index--;
if (index < 0)
index = tempList.count() + index;
w = tempList.at(index);
}
for (int i = index - 1; i >= 0; i--)
m_flipOrderedWindows.append(tempList.at(i));
for (int i = effects->currentTabBoxWindowList().count() - 1; i >= index; i--)
m_flipOrderedWindows.append(tempList.at(i));
if (w) {
m_flipOrderedWindows.removeAll(w);
m_flipOrderedWindows.append(w);
}
} else {
foreach (SwitchingDirection direction, m_scheduledDirections) { // krazy:exclude=foreach
if (direction == DirectionForward)
index++;
else
index--;
if (index < 0)
index = tempList.count() - 1;
if (index >= tempList.count())
index = 0;
}
tabIndex = index;
EffectWindow* w = nullptr;
if (!m_scheduledDirections.isEmpty() && m_scheduledDirections.head() == DirectionBackward) {
index++;
if (index >= tempList.count())
index = 0;
}
// sort from stacking order
for (int i = index + 1; i < tempList.count(); i++)
m_flipOrderedWindows.append(tempList.at(i));
for (int i = 0; i <= index; i++)
m_flipOrderedWindows.append(tempList.at(i));
if (w) {
m_flipOrderedWindows.removeAll(w);
m_flipOrderedWindows.append(w);
}
}
int winMask = PAINT_WINDOW_TRANSFORMED | PAINT_WINDOW_TRANSLUCENT;
// fade in/out one window at the end of the stack during animation
if (m_animation && !m_scheduledDirections.isEmpty()) {
EffectWindow* w = m_flipOrderedWindows.last();
if (ItemInfo *info = m_windows.value(w,0)) {
WindowPaintData data(w);
if (effects->numScreens() > 1) {
data.setProjectionMatrix(m_projectionMatrix);
data.setModelViewMatrix(m_modelviewMatrix);
}
data.setRotationAxis(Qt::YAxis);
data.setRotationAngle(m_angle * m_startStopTimeLine.currentValue());
data.setOpacity(info->opacity);
data.setBrightness(info->brightness);
data.setSaturation(info->saturation);
int distance = tempList.count() - 1;
float zDistance = 500.0f;
data.translate(- (w->x() - m_screenArea.x() + data.xTranslation()) * m_startStopTimeLine.currentValue());
data.translate(m_screenArea.width() * m_xPosition * m_startStopTimeLine.currentValue(),
(m_screenArea.y() + m_screenArea.height() * m_yPosition - (w->y() + w->height() + data.yTranslation())) * m_startStopTimeLine.currentValue());
data.translate(- (m_screenArea.width() * 0.25f) * distance * m_startStopTimeLine.currentValue(),
- (m_screenArea.height() * 0.10f) * distance * m_startStopTimeLine.currentValue(),
- (zDistance * distance) * m_startStopTimeLine.currentValue());
if (m_scheduledDirections.head() == DirectionForward)
data.multiplyOpacity(0.8 * m_timeLine.currentValue());
else
data.multiplyOpacity(0.8 * (1.0 - m_timeLine.currentValue()));
if (effects->numScreens() > 1) {
adjustWindowMultiScreen(w, data);
}
effects->drawWindow(w, winMask, infiniteRegion(), data);
}
}
foreach (EffectWindow *w, m_flipOrderedWindows) {
ItemInfo *info = m_windows.value(w,0);
if (!info)
continue;
WindowPaintData data(w);
if (effects->numScreens() > 1) {
data.setProjectionMatrix(m_projectionMatrix);
data.setModelViewMatrix(m_modelviewMatrix);
}
data.setRotationAxis(Qt::YAxis);
data.setRotationAngle(m_angle * m_startStopTimeLine.currentValue());
data.setOpacity(info->opacity);
data.setBrightness(info->brightness);
data.setSaturation(info->saturation);
int windowIndex = tempList.indexOf(w);
int distance;
if (m_mode == TabboxMode) {
if (windowIndex < tabIndex)
distance = tempList.count() - (tabIndex - windowIndex);
else if (windowIndex > tabIndex)
distance = windowIndex - tabIndex;
else
distance = 0;
} else {
distance = m_flipOrderedWindows.count() - m_flipOrderedWindows.indexOf(w) - 1;
if (!m_scheduledDirections.isEmpty() && m_scheduledDirections.head() == DirectionBackward) {
distance--;
}
}
if (!m_scheduledDirections.isEmpty() && m_scheduledDirections.head() == DirectionBackward) {
if (w == m_flipOrderedWindows.last()) {
distance = -1;
data.multiplyOpacity(m_timeLine.currentValue());
}
}
float zDistance = 500.0f;
data.translate(- (w->x() - m_screenArea.x() + data.xTranslation()) * m_startStopTimeLine.currentValue());
data.translate(m_screenArea.width() * m_xPosition * m_startStopTimeLine.currentValue(),
(m_screenArea.y() + m_screenArea.height() * m_yPosition - (w->y() + w->height() + data.yTranslation())) * m_startStopTimeLine.currentValue());
data.translate(-(m_screenArea.width() * 0.25f) * distance * m_startStopTimeLine.currentValue(),
-(m_screenArea.height() * 0.10f) * distance * m_startStopTimeLine.currentValue(),
-(zDistance * distance) * m_startStopTimeLine.currentValue());
if (m_animation && !m_scheduledDirections.isEmpty()) {
if (m_scheduledDirections.head() == DirectionForward) {
data.translate((m_screenArea.width() * 0.25f) * m_timeLine.currentValue(),
(m_screenArea.height() * 0.10f) * m_timeLine.currentValue(),
zDistance * m_timeLine.currentValue());
if (distance == 0)
data.multiplyOpacity((1.0 - m_timeLine.currentValue()));
} else {
data.translate(- (m_screenArea.width() * 0.25f) * m_timeLine.currentValue(),
- (m_screenArea.height() * 0.10f) * m_timeLine.currentValue(),
- zDistance * m_timeLine.currentValue());
}
}
data.multiplyOpacity((0.8 + 0.2 * (1.0 - m_startStopTimeLine.currentValue())));
if (effects->numScreens() > 1) {
adjustWindowMultiScreen(w, data);
}
effects->drawWindow(w, winMask, infiniteRegion(), data);
}
if (m_windowTitle) {
// Render the caption frame
if (m_animation) {
m_captionFrame->setCrossFadeProgress(m_timeLine.currentValue());
}
m_captionFrame->render(region, m_startStopTimeLine.currentValue());
}
}
}
void FlipSwitchEffect::postPaintScreen()
{
if (m_active) {
if (m_start && m_startStopTimeLine.currentValue() == 1.0f) {
m_start = false;
if (!m_scheduledDirections.isEmpty()) {
m_animation = true;
m_timeLine.setCurrentTime(0);
if (m_scheduledDirections.count() == 1) {
m_currentAnimationEasingCurve = QEasingCurve::OutSine;
m_timeLine.setEasingCurve(m_currentAnimationEasingCurve);
} else {
m_currentAnimationEasingCurve = QEasingCurve::Linear;
m_timeLine.setEasingCurve(m_currentAnimationEasingCurve);
}
}
effects->addRepaintFull();
}
if (m_stop && m_startStopTimeLine.currentValue() == 0.0f) {
m_stop = false;
m_active = false;
m_captionFrame->free();
m_lastPresentTime = std::chrono::milliseconds::zero();
effects->setActiveFullScreenEffect(nullptr);
effects->addRepaintFull();
qDeleteAll(m_windows);
m_windows.clear();
}
if (m_animation && m_timeLine.currentValue() == 1.0f) {
m_timeLine.setCurrentTime(0);
m_scheduledDirections.dequeue();
if (m_scheduledDirections.isEmpty()) {
m_animation = false;
effects->addRepaintFull();
} else {
if (m_scheduledDirections.count() == 1) {
if (m_stop)
m_currentAnimationEasingCurve = QEasingCurve::Linear;
else
m_currentAnimationEasingCurve = QEasingCurve::OutSine;
} else {
m_currentAnimationEasingCurve = QEasingCurve::Linear;
}
m_timeLine.setEasingCurve(m_currentAnimationEasingCurve);
}
}
if (m_start || m_stop || m_animation)
effects->addRepaintFull();
}
effects->postPaintScreen();
}
void FlipSwitchEffect::prePaintWindow(EffectWindow* w, WindowPrePaintData& data, std::chrono::milliseconds presentTime)
{
if (m_active) {
if (m_windows.contains(w)) {
data.setTransformed();
data.setTranslucent();
if (!w->isOnCurrentDesktop())
w->enablePainting(EffectWindow::PAINT_DISABLED_BY_DESKTOP);
if (w->isMinimized())
w->enablePainting(EffectWindow::PAINT_DISABLED_BY_MINIMIZE);
} else {
if ((m_start || m_stop) && !w->isDesktop() && w->isOnCurrentDesktop())
data.setTranslucent();
else if (!w->isDesktop())
w->disablePainting(EffectWindow::PAINT_DISABLED_BY_DESKTOP);
}
}
effects->prePaintWindow(w, data, presentTime);
}
void FlipSwitchEffect::paintWindow(EffectWindow* w, int mask, QRegion region, WindowPaintData& data)
{
if (m_active) {
ItemInfo *info = m_windows.value(w,0);
if (info) {
info->opacity = data.opacity();
info->brightness = data.brightness();
info->saturation = data.saturation();
}
// fade out all windows not in window list except the desktops
const bool isFader = (m_start || m_stop) && !info && !w->isDesktop();
if (isFader)
data.multiplyOpacity((1.0 - m_startStopTimeLine.currentValue()));
// if not a fader or the desktop, skip painting here to prevent flicker
if (!(isFader || w->isDesktop()))
return;
}
effects->paintWindow(w, mask, region, data);
}
//*************************************************************
// Tabbox handling
//*************************************************************
void FlipSwitchEffect::slotTabBoxAdded(int mode)
{
if (effects->activeFullScreenEffect() && effects->activeFullScreenEffect() != this)
return;
// only for windows mode
effects->setShowingDesktop(false);
if (((mode == TabBoxWindowsMode && m_tabbox) ||
(mode == TabBoxWindowsAlternativeMode && m_tabboxAlternative) ||
(mode == TabBoxCurrentAppWindowsMode && m_tabbox) ||
(mode == TabBoxCurrentAppWindowsAlternativeMode && m_tabboxAlternative))
&& (!m_active || (m_active && m_stop))
&& !effects->currentTabBoxWindowList().isEmpty()) {
setActive(true, TabboxMode);
if (m_active)
effects->refTabBox();
}
}
void FlipSwitchEffect::slotTabBoxClosed()
{
if (m_active) {
setActive(false, TabboxMode);
effects->unrefTabBox();
}
}
void FlipSwitchEffect::slotTabBoxUpdated()
{
if (m_active && !m_stop) {
if (!effects->currentTabBoxWindowList().isEmpty()) {
// determine the switch direction
if (m_selectedWindow != effects->currentTabBoxWindow()) {
if (m_selectedWindow != nullptr) {
int old_index = effects->currentTabBoxWindowList().indexOf(m_selectedWindow);
int new_index = effects->currentTabBoxWindowList().indexOf(effects->currentTabBoxWindow());
SwitchingDirection new_direction;
int distance = new_index - old_index;
if (distance > 0)
new_direction = DirectionForward;
if (distance < 0)
new_direction = DirectionBackward;
if (effects->currentTabBoxWindowList().count() == 2) {
new_direction = DirectionForward;
distance = 1;
}
if (distance != 0) {
distance = abs(distance);
int tempDistance = effects->currentTabBoxWindowList().count() - distance;
if (tempDistance < abs(distance)) {
distance = tempDistance;
if (new_direction == DirectionForward)
new_direction = DirectionBackward;
else
new_direction = DirectionForward;
}
scheduleAnimation(new_direction, distance);
}
}
m_selectedWindow = effects->currentTabBoxWindow();
updateCaption();
}
}
effects->addRepaintFull();
}
}
//*************************************************************
// Window adding/removing handling
//*************************************************************
void FlipSwitchEffect::slotWindowAdded(EffectWindow* w)
{
if (m_active && isSelectableWindow(w)) {
m_windows[ w ] = new ItemInfo;
}
}
void FlipSwitchEffect::slotWindowClosed(EffectWindow* w)
{
if (m_selectedWindow == w)
m_selectedWindow = nullptr;
if (m_active) {
QHash< const EffectWindow*, ItemInfo* >::iterator it = m_windows.find(w);
if (it != m_windows.end()) {
delete *it;
m_windows.erase(it);
}
}
}
//*************************************************************
// Activation
//*************************************************************
void FlipSwitchEffect::setActive(bool activate, FlipSwitchMode mode)
{
if (activate) {
// effect already active, do some sanity checks
if (m_active) {
if (m_stop) {
if (mode != m_mode) {
// only the same mode may reactivate the effect
return;
}
} else {
// active, but not scheduled for closing -> abort
return;
}
}
m_mode = mode;
foreach (EffectWindow * w, effects->stackingOrder()) {
if (isSelectableWindow(w) && !m_windows.contains(w))
m_windows[ w ] = new ItemInfo;
}
if (m_windows.isEmpty())
return;
effects->setActiveFullScreenEffect(this);
m_active = true;
m_start = true;
m_startStopTimeLine.setEasingCurve(QEasingCurve::InOutSine);
m_activeScreen = effects->activeScreen();
m_screenArea = effects->clientArea(ScreenArea, m_activeScreen, effects->currentDesktop());
if (effects->numScreens() > 1) {
// unfortunatelly we have to change the projection matrix in dual screen mode
// code is copied from Coverswitch
QRect fullRect = effects->clientArea(FullArea, m_activeScreen, effects->currentDesktop());
float fovy = 60.0f;
float aspect = 1.0f;
float zNear = 0.1f;
float zFar = 100.0f;
float ymax = zNear * std::tan(fovy * M_PI / 360.0f);
float ymin = -ymax;
float xmin = ymin * aspect;
float xmax = ymax * aspect;
if (m_screenArea.width() != fullRect.width()) {
if (m_screenArea.x() == 0) {
// horizontal layout: left screen
xmin *= (float)m_screenArea.width() / (float)fullRect.width();
xmax *= (fullRect.width() - 0.5f * m_screenArea.width()) / (0.5f * fullRect.width());
} else {
// horizontal layout: right screen
xmin *= (fullRect.width() - 0.5f * m_screenArea.width()) / (0.5f * fullRect.width());
xmax *= (float)m_screenArea.width() / (float)fullRect.width();
}
}
if (m_screenArea.height() != fullRect.height()) {
if (m_screenArea.y() == 0) {
// vertical layout: top screen
ymin *= (fullRect.height() - 0.5f * m_screenArea.height()) / (0.5f * fullRect.height());
ymax *= (float)m_screenArea.height() / (float)fullRect.height();
} else {
// vertical layout: bottom screen
ymin *= (float)m_screenArea.height() / (float)fullRect.height();
ymax *= (fullRect.height() - 0.5f * m_screenArea.height()) / (0.5f * fullRect.height());
}
}
m_projectionMatrix = QMatrix4x4();
m_projectionMatrix.frustum(xmin, xmax, ymin, ymax, zNear, zFar);
const float scaleFactor = 1.1f / zNear;
// Create a second matrix that transforms screen coordinates
// to world coordinates.
QMatrix4x4 matrix;
matrix.translate(xmin * scaleFactor, ymax * scaleFactor, -1.1);
matrix.scale( (xmax - xmin) * scaleFactor / fullRect.width(),
-(ymax - ymin) * scaleFactor / fullRect.height(),
0.001);
// Combine the matrices
m_projectionMatrix *= matrix;
m_modelviewMatrix = QMatrix4x4();
m_modelviewMatrix.translate(m_screenArea.x(), m_screenArea.y(), 0.0);
}
if (m_stop) {
// effect is still closing from last usage
m_stop = false;
} else {
// things to do only when there is no closing animation
m_scheduledDirections.clear();
}
switch(m_mode) {
case TabboxMode:
m_selectedWindow = effects->currentTabBoxWindow();
effects->startMouseInterception(this, Qt::ArrowCursor);
break;
case CurrentDesktopMode:
m_selectedWindow = effects->activeWindow();
effects->startMouseInterception(this, Qt::BlankCursor);
m_hasKeyboardGrab = effects->grabKeyboard(this);
break;
case AllDesktopsMode:
m_selectedWindow = effects->activeWindow();
effects->startMouseInterception(this, Qt::BlankCursor);
m_hasKeyboardGrab = effects->grabKeyboard(this);
break;
}
// Setup caption frame geometry
QRect frameRect = QRect(m_screenArea.width() * 0.25f + m_screenArea.x(),
m_screenArea.height() * 0.1f + m_screenArea.y() - QFontMetrics(m_captionFont).height(),
m_screenArea.width() * 0.5f,
QFontMetrics(m_captionFont).height());
if (!m_captionFrame) {
m_captionFrame = effects->effectFrame(EffectFrameStyled);
m_captionFrame->setFont(m_captionFont);
m_captionFrame->enableCrossFade(true);
}
m_captionFrame->setGeometry(frameRect);
m_captionFrame->setIconSize(QSize(frameRect.height(), frameRect.height()));
updateCaption();
effects->addRepaintFull();
} else {
// only deactivate if mode is current mode
if (mode != m_mode)
return;
if (m_start && m_scheduledDirections.isEmpty()) {
m_start = false;
}
m_stop = true;
if (m_animation) {
m_startStopTimeLine.setEasingCurve(QEasingCurve::OutSine);
if (m_scheduledDirections.count() == 1) {
if (m_currentAnimationEasingCurve == QEasingCurve::InOutSine)
m_currentAnimationEasingCurve = QEasingCurve::InSine;
else if (m_currentAnimationEasingCurve == QEasingCurve::OutSine)
m_currentAnimationEasingCurve = QEasingCurve::Linear;
m_timeLine.setEasingCurve(m_currentAnimationEasingCurve);
}
} else
m_startStopTimeLine.setEasingCurve(QEasingCurve::InOutSine);
effects->stopMouseInterception(this);
if (m_hasKeyboardGrab) {
effects->ungrabKeyboard();
m_hasKeyboardGrab = false;
}
effects->addRepaintFull();
}
}
void FlipSwitchEffect::toggleActiveAllDesktops()
{
if (m_active) {
if (m_stop) {
// reactivate if stopping
setActive(true, AllDesktopsMode);
} else {
// deactivate if not stopping
setActive(false, AllDesktopsMode);
}
} else {
setActive(true, AllDesktopsMode);
}
}
void FlipSwitchEffect::toggleActiveCurrent()
{
if (m_active) {
if (m_stop) {
// reactivate if stopping
setActive(true, CurrentDesktopMode);
} else {
// deactivate if not stopping
setActive(false, CurrentDesktopMode);
}
} else {
setActive(true, CurrentDesktopMode);
}
}
//*************************************************************
// Helper function
//*************************************************************
bool FlipSwitchEffect::isSelectableWindow(EffectWindow* w) const
{
// desktop windows might be included
if ((w->isSpecialWindow() && !w->isDesktop()) || w->isUtility())
return false;
if (w->isDesktop())
return (m_mode == TabboxMode && effects->currentTabBoxWindowList().contains(w));
if (w->isDeleted())
return false;
if (!w->acceptsFocus())
return false;
switch(m_mode) {
case TabboxMode:
return effects->currentTabBoxWindowList().contains(w);
case CurrentDesktopMode:
return w->isOnCurrentDesktop();
case AllDesktopsMode:
//nothing special
break;
}
return true;
}
void FlipSwitchEffect::scheduleAnimation(const SwitchingDirection& direction, int distance)
{
if (m_start) {
// start is still active so change the shape to have a nice transition
m_startStopTimeLine.setEasingCurve(QEasingCurve::InSine);
}
if (!m_animation && !m_start) {
m_animation = true;
m_scheduledDirections.enqueue(direction);
distance--;
// reset shape just to make sure
m_currentAnimationEasingCurve = QEasingCurve::InOutSine;
m_timeLine.setEasingCurve(m_currentAnimationEasingCurve);
}
for (int i = 0; i < distance; i++) {
if (m_scheduledDirections.count() > 1 && m_scheduledDirections.last() != direction)
m_scheduledDirections.pop_back();
else
m_scheduledDirections.enqueue(direction);
if (m_scheduledDirections.count() == m_windows.count() + 1) {
SwitchingDirection temp = m_scheduledDirections.dequeue();
m_scheduledDirections.clear();
m_scheduledDirections.enqueue(temp);
}
}
if (m_scheduledDirections.count() > 1) {
QEasingCurve curve;
switch (m_currentAnimationEasingCurve.type()) {
case QEasingCurve::InOutSine:
curve = QEasingCurve::InSine;
break;
case QEasingCurve::OutSine:
curve = QEasingCurve::Linear;
break;
default:
curve = m_currentAnimationEasingCurve;
}
if (m_currentAnimationEasingCurve != curve) {
m_currentAnimationEasingCurve = curve;
m_timeLine.setEasingCurve(curve);
}
}
}
void FlipSwitchEffect::adjustWindowMultiScreen(const KWin::EffectWindow* w, WindowPaintData& data)
{
if (effects->numScreens() <= 1)
return;
QRect clientRect = effects->clientArea(FullScreenArea, w->screen(), effects->currentDesktop());
QRect rect = effects->clientArea(ScreenArea, m_activeScreen, effects->currentDesktop());
QRect fullRect = effects->clientArea(FullArea, m_activeScreen, effects->currentDesktop());
if (w->screen() == m_activeScreen) {
if (clientRect.width() != fullRect.width() && clientRect.x() != fullRect.x()) {
data.translate(- clientRect.x());
}
if (clientRect.height() != fullRect.height() && clientRect.y() != fullRect.y()) {
data.translate(0.0, - clientRect.y());
}
} else {
if (clientRect.width() != fullRect.width() && clientRect.x() < rect.x()) {
data.translate(- (m_screenArea.x() - clientRect.x()));
}
if (clientRect.height() != fullRect.height() && clientRect.y() < m_screenArea.y()) {
data.translate(0.0, - (m_screenArea.y() - clientRect.y()));
}
}
}
void FlipSwitchEffect::selectNextOrPreviousWindow(bool forward)
{
if (!m_active || !m_selectedWindow) {
return;
}
const int index = effects->currentTabBoxWindowList().indexOf(m_selectedWindow);
int newIndex = index;
if (forward) {
++newIndex;
} else {
--newIndex;
}
if (newIndex == effects->currentTabBoxWindowList().size()) {
newIndex = 0;
} else if (newIndex < 0) {
newIndex = effects->currentTabBoxWindowList().size() -1;
}
if (index == newIndex) {
return;
}
effects->setTabBoxWindow(effects->currentTabBoxWindowList().at(newIndex));
}
//*************************************************************
// Keyboard handling
//*************************************************************
void FlipSwitchEffect::globalShortcutChanged(QAction *action, const QKeySequence &shortcut)
{
if (action->objectName() == QStringLiteral("FlipSwitchAll")) {
m_shortcutAll.clear();
m_shortcutAll.append(shortcut);
} else if (action->objectName() == QStringLiteral("FlipSwitchCurrent")) {
m_shortcutCurrent.clear();
m_shortcutCurrent.append(shortcut);
}
}
void FlipSwitchEffect::grabbedKeyboardEvent(QKeyEvent* e)
{
if (e->type() == QEvent::KeyPress) {
// check for global shortcuts
// HACK: keyboard grab disables the global shortcuts so we have to check for global shortcut (bug 156155)
if (m_mode == CurrentDesktopMode && m_shortcutCurrent.contains(e->key() + e->modifiers())) {
toggleActiveCurrent();
return;
}
if (m_mode == AllDesktopsMode && m_shortcutAll.contains(e->key() + e->modifiers())) {
toggleActiveAllDesktops();
return;
}
switch(e->key()) {
case Qt::Key_Escape:
setActive(false, m_mode);
return;
case Qt::Key_Tab: {
// find next window
if (m_windows.isEmpty())
return; // sanity check
bool found = false;
for (int i = effects->stackingOrder().indexOf(m_selectedWindow) - 1; i >= 0; i--) {
if (isSelectableWindow(effects->stackingOrder().at(i))) {
m_selectedWindow = effects->stackingOrder().at(i);
found = true;
break;
}
}
if (!found) {
for (int i = effects->stackingOrder().count() - 1; i > effects->stackingOrder().indexOf(m_selectedWindow); i--) {
if (isSelectableWindow(effects->stackingOrder().at(i))) {
m_selectedWindow = effects->stackingOrder().at(i);
found = true;
break;
}
}
}
if (found) {
updateCaption();
scheduleAnimation(DirectionForward);
}
break;
}
case Qt::Key_Backtab: {
// find previous window
if (m_windows.isEmpty())
return; // sanity check
bool found = false;
for (int i = effects->stackingOrder().indexOf(m_selectedWindow) + 1; i < effects->stackingOrder().count(); i++) {
if (isSelectableWindow(effects->stackingOrder().at(i))) {
m_selectedWindow = effects->stackingOrder().at(i);
found = true;
break;
}
}
if (!found) {
for (int i = 0; i < effects->stackingOrder().indexOf(m_selectedWindow); i++) {
if (isSelectableWindow(effects->stackingOrder().at(i))) {
m_selectedWindow = effects->stackingOrder().at(i);
found = true;
break;
}
}
}
if (found) {
updateCaption();
scheduleAnimation(DirectionBackward);
}
break;
}
case Qt::Key_Return:
case Qt::Key_Enter:
case Qt::Key_Space:
if (m_selectedWindow)
effects->activateWindow(m_selectedWindow);
setActive(false, m_mode);
break;
default:
break;
}
effects->addRepaintFull();
}
}
void FlipSwitchEffect::slotTabBoxKeyEvent(QKeyEvent *event)
{
if (event->type() == QEvent::KeyPress) {
switch (event->key()) {
case Qt::Key_Up:
case Qt::Key_Left:
selectPreviousWindow();
break;
case Qt::Key_Down:
case Qt::Key_Right:
selectNextWindow();
break;
default:
// nothing
break;
}
}
}
bool FlipSwitchEffect::isActive() const
{
return m_active && !effects->isScreenLocked();
}
void FlipSwitchEffect::updateCaption()
{
if (!m_selectedWindow) {
return;
}
if (m_selectedWindow->isDesktop()) {
m_captionFrame->setText(i18nc("Special entry in alt+tab list for minimizing all windows",
"Show Desktop"));
static QPixmap pix = QIcon::fromTheme(QStringLiteral("user-desktop")).pixmap(m_captionFrame->iconSize());
m_captionFrame->setIcon(pix);
} else {
m_captionFrame->setText(m_selectedWindow->caption());
m_captionFrame->setIcon(m_selectedWindow->icon());
}
}
//*************************************************************
// Mouse handling
//*************************************************************
void FlipSwitchEffect::windowInputMouseEvent(QEvent* e)
{
if (e->type() != QEvent::MouseButtonPress)
return;
// we don't want click events during animations
if (m_animation)
return;
QMouseEvent* event = static_cast< QMouseEvent* >(e);
switch (event->button()) {
case Qt::XButton1: // wheel up
selectPreviousWindow();
break;
case Qt::XButton2: // wheel down
selectNextWindow();
break;
case Qt::LeftButton:
case Qt::RightButton:
case Qt::MiddleButton:
default:
// TODO: Change window on mouse button click
break;
}
}
//*************************************************************
// Item Info
//*************************************************************
FlipSwitchEffect::ItemInfo::ItemInfo()
: deleted(false)
, opacity(0.0)
, brightness(0.0)
, saturation(0.0)
{
}
FlipSwitchEffect::ItemInfo::~ItemInfo()
{
}
} // namespace
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