426 lines
15 KiB
C++
426 lines
15 KiB
C++
/*****************************************************************
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KWin - the KDE window manager
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This file is part of the KDE project.
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Copyright (C) 2007 Rivo Laks <rivolaks@hot.ee>
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You can Freely distribute this program under the GNU General Public
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License. See the file "COPYING" for the exact licensing terms.
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******************************************************************/
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#include "presentwindows.h"
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#include <kactioncollection.h>
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#include <kaction.h>
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#include <klocale.h>
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#include <QMouseEvent>
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#include <math.h>
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#include <assert.h>
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// Note that currently effects need to be manually enabled in the EffectsHandler
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// class constructor (in effects.cpp).
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namespace KWin
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{
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KWIN_EFFECT( PresentWindows, PresentWindowsEffect )
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PresentWindowsEffect::PresentWindowsEffect() : QObject(), Effect()
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{
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mShowWindowsFromAllDesktops = false;
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mActivated = false;
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mActiveness = 0.0;
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KActionCollection* actionCollection = new KActionCollection( this );
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KAction* a = (KAction*)actionCollection->addAction( "Expose" );
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a->setText( i18n("Toggle Expose effect" ));
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a->setGlobalShortcut(KShortcut(Qt::CTRL + Qt::Key_F10));
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connect(a, SIGNAL(triggered(bool)), this, SLOT(toggleActive()));
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KAction* b = (KAction*)actionCollection->addAction( "ExposeAll" );
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b->setText( i18n("Toggle Expose effect (incl other desktops)" ));
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b->setGlobalShortcut(KShortcut(Qt::CTRL + Qt::Key_F11));
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connect(b, SIGNAL(triggered(bool)), this, SLOT(toggleActiveAllDesktops()));
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borderActivate = ElectricTopRight;
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borderActivateAll = ElectricNone;
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effects->reserveElectricBorder( borderActivate );
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effects->reserveElectricBorder( borderActivateAll );
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}
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PresentWindowsEffect::~PresentWindowsEffect()
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{
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effects->unreserveElectricBorder( borderActivate );
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effects->unreserveElectricBorder( borderActivateAll );
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}
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void PresentWindowsEffect::prePaintScreen( int* mask, QRegion* region, int time )
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{
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// How long does it take for the effect to get it's full strength (in ms)
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const float changeTime = 300;
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if(mActivated)
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mActiveness = qMin(1.0f, mActiveness + time/changeTime);
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else if(mActiveness > 0.0f)
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{
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mActiveness = qMax(0.0f, mActiveness - time/changeTime);
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if(mActiveness <= 0.0f)
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effectTerminated();
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}
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// We need to mark the screen windows as transformed. Otherwise the whole
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// screen won't be repainted, resulting in artefacts
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if( mActiveness > 0.0f )
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*mask |= Effect::PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS;
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effects->prePaintScreen(mask, region, time);
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}
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void PresentWindowsEffect::prePaintWindow( EffectWindow* w, int* mask, QRegion* paint, QRegion* clip, int time )
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{
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if( mActiveness > 0.0f && mWindowData.contains(w) )
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{
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// This window will be transformed by the effect
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*mask |= Effect::PAINT_WINDOW_TRANSFORMED;
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w->enablePainting( EffectWindow::PAINT_DISABLED_BY_MINIMIZE );
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w->enablePainting( EffectWindow::PAINT_DISABLED_BY_DESKTOP );
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// If it's minimized window or on another desktop and effect is not
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// fully active, then apply some transparency
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if( mActiveness < 1.0f && (w->isMinimized() || !w->isOnCurrentDesktop() ))
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*mask |= Effect::PAINT_WINDOW_TRANSLUCENT;
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// Change window's hover according to cursor pos
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WindowData& windata = mWindowData[w];
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const float hoverchangetime = 200;
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if( windata.area.contains(cursorPos()) )
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windata.hover = qMin(1.0f, windata.hover + time / hoverchangetime);
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else
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windata.hover = qMax(0.0f, windata.hover - time / hoverchangetime);
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}
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effects->prePaintWindow( w, mask, paint, clip, time );
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}
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void PresentWindowsEffect::paintWindow( EffectWindow* w, int mask, QRegion region, WindowPaintData& data )
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{
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if(mActiveness > 0.0f && mWindowData.contains(w))
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{
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// Change window's position and scale
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const WindowData& windata = mWindowData[w];
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data.xScale = interpolate(data.xScale, windata.scale, mActiveness);
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data.yScale = interpolate(data.xScale, windata.scale, mActiveness);
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data.xTranslate = (int)interpolate(data.xTranslate, windata.area.left() - w->x(), mActiveness);
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data.yTranslate = (int)interpolate(data.yTranslate, windata.area.top() - w->y(), mActiveness);
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// Darken all windows except for the one under the cursor
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data.brightness *= interpolate(1.0, 0.7, mActiveness * (1.0f - windata.hover));
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// If it's minimized window or on another desktop and effect is not
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// fully active, then apply some transparency
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if( mActiveness < 1.0f && (w->isMinimized() || !w->isOnCurrentDesktop() ))
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data.opacity *= interpolate(0.0, 1.0, mActiveness);
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}
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// Call the next effect.
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effects->paintWindow( w, mask, region, data );
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}
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void PresentWindowsEffect::postPaintScreen()
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{
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// If mActiveness is between 0 and 1, the effect is still in progress and the
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// workspace has to be repainted during the next pass
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if( mActiveness > 0.0 && mActiveness < 1.0 )
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effects->addRepaintFull(); // trigger next animation repaint
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// Call the next effect.
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effects->postPaintScreen();
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}
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void PresentWindowsEffect::windowInputMouseEvent( Window w, QEvent* e )
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{
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assert( w == mInput );
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if( e->type() != QEvent::MouseButtonPress )
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return;
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// Find out which window (if any) was clicked and activate it
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QPoint pos = static_cast< QMouseEvent* >( e )->pos();
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for( QHash<EffectWindow*, WindowData>::iterator it = mWindowData.begin();
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it != mWindowData.end(); ++it )
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{
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if( it.value().area.contains(pos) )
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{
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effects->activateWindow( it.key() );
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// mWindowData gets cleared and rebuilt when a window is
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// activated, so it's dangerous (and unnecessary) to continue
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break;
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}
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}
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// Deactivate effect, no matter if any window was actually activated
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setActive(false);
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}
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void PresentWindowsEffect::windowActivated( EffectWindow* )
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{
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rearrangeWindows();
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}
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void PresentWindowsEffect::windowClosed( EffectWindow* )
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{
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rearrangeWindows();
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}
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void PresentWindowsEffect::setActive(bool active)
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{
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mActivated = active;
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rearrangeWindows();
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if( mActivated && mActiveness == 0.0f )
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effectActivated();
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}
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void PresentWindowsEffect::effectActivated()
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{
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// Create temporary input window to catch mouse events
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mInput = effects->createFullScreenInputWindow( this, Qt::PointingHandCursor );
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// TODO: maybe also create a KAction so that ressing Esc would terminate the effect?
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}
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void PresentWindowsEffect::effectTerminated()
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{
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// Destroy the temporary input window
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effects->destroyInputWindow( mInput );
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}
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void PresentWindowsEffect::rearrangeWindows()
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{
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if( !mActivated )
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return;
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mWindowData.clear();
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const EffectWindowList& originalwindowlist = effects->stackingOrder();
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// Filter out special windows such as panels and taskbars
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EffectWindowList windowlist;
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foreach( EffectWindow* window, originalwindowlist )
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{
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if( window->isSpecialWindow() )
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continue;
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if( !mShowWindowsFromAllDesktops && !window->isOnCurrentDesktop() )
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continue;
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windowlist.append(window);
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}
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// Calculate new positions and scales for windows
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calculateWindowTransformationsKompose( windowlist );
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// Schedule entire desktop to be repainted
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effects->addRepaintFull();
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}
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void PresentWindowsEffect::calculateWindowTransformationsDumb(EffectWindowList windowlist)
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{
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// Calculate number of rows/cols
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int rows = windowlist.count() / 4 + 1;
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int cols = windowlist.count() / rows + windowlist.count() % rows;
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// Get rect which we can use on current desktop. This excludes e.g. panels
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QRect placementRect = effects->clientArea( PlacementArea, QPoint( 0, 0 ), 0 );
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// Size of one cell
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int cellwidth = placementRect.width() / cols;
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int cellheight = placementRect.height() / rows;
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kDebug() << k_funcinfo << "Got " << windowlist.count() << " clients, using " << rows << "x" << cols << " grid" << endl;
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// Calculate position and scale factor for each window
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int i = 0;
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foreach( EffectWindow* window, windowlist )
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{
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// Row/Col of this window
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int r = i / cols;
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int c = i % cols;
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mWindowData[window].hover = 0.0f;
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mWindowData[window].scale = qMin(cellwidth / (float)window->width(), cellheight / (float)window->height());
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mWindowData[window].area.setLeft(placementRect.left() + cellwidth * c);
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mWindowData[window].area.setTop(placementRect.top() + cellheight * r);
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mWindowData[window].area.setWidth((int)(window->width() * mWindowData[window].scale));
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mWindowData[window].area.setHeight((int)(window->height() * mWindowData[window].scale));
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kDebug() << k_funcinfo << "Window '" << window->caption() << "' gets moved to (" <<
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mWindowData[window].area.left() << "; " << mWindowData[window].area.right() <<
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"), scale: " << mWindowData[window].scale << endl;
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i++;
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}
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}
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float PresentWindowsEffect::windowAspectRatio(EffectWindow* c)
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{
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return c->width() / (float)c->height();
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}
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int PresentWindowsEffect::windowWidthForHeight(EffectWindow* c, int h)
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{
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return (int)((h / (float)c->height()) * c->width());
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}
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int PresentWindowsEffect::windowHeightForWidth(EffectWindow* c, int w)
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{
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return (int)((w / (float)c->width()) * c->height());
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}
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void PresentWindowsEffect::calculateWindowTransformationsKompose(EffectWindowList windowlist)
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{
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// Get rect which we can use on current desktop. This excludes e.g. panels
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QRect availRect = effects->clientArea( PlacementArea, QPoint( 0, 0 ), 0 );
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// Following code is taken from Kompose 0.5.4, src/komposelayout.cpp
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int spacing = 10;
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int rows, columns;
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float parentRatio = availRect.width() / (float)availRect.height();
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// Use more columns than rows when parent's width > parent's height
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if ( parentRatio > 1 )
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{
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columns = (int)ceil( sqrt(windowlist.count()) );
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rows = (int)ceil( (double)windowlist.count() / (double)columns );
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}
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else
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{
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rows = (int)ceil( sqrt(windowlist.count()) );
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columns = (int)ceil( (double)windowlist.count() / (double)rows );
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}
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kDebug() << k_funcinfo << "Using " << rows << " rows & " << columns << " columns for " << windowlist.count() << " clients" << endl;
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// Calculate width & height
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int w = (availRect.width() - (columns+1) * spacing ) / columns;
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int h = (availRect.height() - (rows+1) * spacing ) / rows;
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EffectWindowList::iterator it( windowlist.begin() );
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QList<QRect> geometryRects;
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QList<int> maxRowHeights;
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// Process rows
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for ( int i=0; i<rows; ++i )
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{
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int xOffsetFromLastCol = 0;
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int maxHeightInRow = 0;
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// Process columns
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for ( int j=0; j<columns; ++j )
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{
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EffectWindow* window;
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// Check for end of List
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if ( it == windowlist.end() )
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break;
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window = *it;
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// Calculate width and height of widget
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float ratio = windowAspectRatio(window);
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int widgetw = 100;
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int widgeth = 100;
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int usableW = w;
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int usableH = h;
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// use width of two boxes if there is no right neighbour
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if (window == windowlist.last() && j != columns-1)
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{
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usableW = 2*w;
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}
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++it; // We need access to the neighbour in the following
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// expand if right neighbour has ratio < 1
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if (j != columns-1 && it != windowlist.end() && windowAspectRatio(*it) < 1)
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{
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int addW = w - windowWidthForHeight(*it, h);
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if ( addW > 0 )
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{
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usableW = w + addW;
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}
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}
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if ( ratio == -1 )
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{
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widgetw = w;
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widgeth = h;
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}
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else
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{
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double widthForHeight = windowWidthForHeight(window, usableH);
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double heightForWidth = windowHeightForWidth(window, usableW);
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if ( (ratio >= 1.0 && heightForWidth <= usableH) ||
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(ratio < 1.0 && widthForHeight > usableW) )
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{
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widgetw = usableW;
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widgeth = (int)heightForWidth;
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}
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else if ( (ratio < 1.0 && widthForHeight <= usableW) ||
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(ratio >= 1.0 && heightForWidth > usableH) )
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{
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widgeth = usableH;
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widgetw = (int)widthForHeight;
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}
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}
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// Set the Widget's size
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int alignmentXoffset = 0;
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int alignmentYoffset = 0;
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if ( i==0 && h > widgeth )
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alignmentYoffset = h - widgeth;
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if ( j==0 && w > widgetw )
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alignmentXoffset = w - widgetw;
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QRect geom( availRect.x() + j * (w + spacing) + spacing + alignmentXoffset + xOffsetFromLastCol,
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availRect.y() + i * (h + spacing) + spacing + alignmentYoffset,
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widgetw, widgeth );
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geometryRects.append(geom);
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// Set the x offset for the next column
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if (alignmentXoffset==0)
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xOffsetFromLastCol += widgetw-w;
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if (maxHeightInRow < widgeth)
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maxHeightInRow = widgeth;
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}
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maxRowHeights.append(maxHeightInRow);
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}
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int topOffset = 0;
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for( int i = 0; i < rows; i++ )
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{
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for( int j = 0; j < columns; j++ )
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{
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int pos = i*columns + j;
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if(pos >= windowlist.count())
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break;
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EffectWindow* window = windowlist[pos];
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QRect geom = geometryRects[pos];
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geom.setY( geom.y() + topOffset );
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mWindowData[window].area = geom;
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mWindowData[window].scale = geom.width() / (float)window->width();
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mWindowData[window].hover = 0.0f;
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kDebug() << k_funcinfo << "Window '" << window->caption() << "' gets moved to (" <<
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mWindowData[window].area.left() << "; " << mWindowData[window].area.right() <<
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"), scale: " << mWindowData[window].scale << endl;
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}
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if ( maxRowHeights[i]-h > 0 )
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topOffset += maxRowHeights[i]-h;
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}
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}
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bool PresentWindowsEffect::borderActivated( ElectricBorder border )
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{
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if( border == borderActivate && !mActivated )
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{
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toggleActive();
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return true;
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}
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if( border == borderActivateAll && !mActivated )
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{
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toggleActiveAllDesktops();
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return true;
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}
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return false;
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}
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} // namespace
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#include "presentwindows.moc"
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