workspace/kwin/effects/presentwindows.h

   1 /********************************************************************
   2  KWin - the KDE window manager
   3  This file is part of the KDE project.
   4
   5 Copyright (C) 2007 Rivo Laks <rivolaks@hot.ee>
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 *********************************************************************/
  20
  21 #ifndef KWIN_PRESENTWINDOWS_H
  22 #define KWIN_PRESENTWINDOWS_H
  23
  24 // Include with base class for effects.
  25 #include <kwineffects.h>
  26 #include <kwinglutils.h>
  27
  28 #include <QPixmap>
  29
  30 #ifdef KWIN_HAVE_XRENDER_COMPOSITING
  31 #include <X11/extensions/Xrender.h>
  32 #endif
  33
  34 namespace KWin
  35 {
  36
  37 /**
  38  * Expose-like effect which shows all windows on current desktop side-by-side,
  39  *  letting the user select active window.
  40  **/
  41 class PresentWindowsEffect
  42     : public QObject, public Effect
  43     {
  44     Q_OBJECT
  45     public:
  46         PresentWindowsEffect();
  47         virtual ~PresentWindowsEffect();
  48
  49         virtual void prePaintScreen( ScreenPrePaintData& data, int time );
  50         virtual void prePaintWindow( EffectWindow* w, WindowPrePaintData& data, int time );
  51         virtual void paintScreen( int mask, QRegion region, ScreenPaintData& data );
  52         virtual void paintWindow( EffectWindow* w, int mask, QRegion region, WindowPaintData& data );
  53         virtual void postPaintScreen();
  54
  55         virtual void windowClosed( EffectWindow* c );
  56         virtual void windowInputMouseEvent( Window w, QEvent* e );
  57         virtual bool borderActivated( ElectricBorder border );
  58         virtual void grabbedKeyboardEvent( QKeyEvent* e );
  59
  60     public slots:
  61         void setActive(bool active);
  62         void toggleActive()  { mShowWindowsFromAllDesktops = false; setActive(!mActivated); }
  63         void toggleActiveAllDesktops()  { mShowWindowsFromAllDesktops = true; setActive(!mActivated); }
  64
  65     protected:
  66         // Updates window tranformations, i.e. destination pos and scale of the window
  67         void rearrangeWindows();
  68         void calculateWindowTransformationsDumb(EffectWindowList windowlist);
  69         void calculateWindowTransformationsKompose(EffectWindowList windowlist);
  70         void calculateWindowTransformationsClosest(EffectWindowList windowlist);
  71         bool canRearrangeClosest(EffectWindowList windowlist);
  72
  73         // Helper methods for layout calculation
  74         double windowAspectRatio(EffectWindow* c);
  75         int windowWidthForHeight(EffectWindow* c, int h);
  76         int windowHeightForWidth(EffectWindow* c, int w);
  77
  78         void assignSlots( const QRect& area, int columns, int rows );
  79         void getBestAssignments();
  80
  81         void updateFilterTexture();
  82         void discardFilterTexture();
  83
  84         void paintWindowIcon( EffectWindow* w, WindowPaintData& data );
  85
  86         void setHighlightedWindow( EffectWindow* w );
  87         EffectWindow* relativeWindow( EffectWindow* w, int xdiff, int ydiff, bool wrap ) const;
  88         EffectWindow* findFirstWindow() const;
  89
  90         // Called once the effect is activated (and wasn't activated before)
  91         void effectActivated();
  92         // Called once the effect has terminated
  93         void effectTerminated();
  94
  95     private:
  96         bool mShowWindowsFromAllDesktops;
  97
  98         // Whether the effect is currently activated by the user
  99         bool mActivated;
 100         // 0 = not active, 1 = fully active
 101         double mActiveness;
 102         // 0 = start of rearranging (old_area), 1 = done
 103         double mRearranging;
 104
 105         Window mInput;
 106         bool hasKeyboardGrab;
 107
 108         EffectWindowList mWindowsToPresent;
 109         struct WindowData
 110             {
 111             QRect area;
 112             QRect old_area; // when rearranging, otherwise unset
 113             double scale;
 114             double old_scale; // when rearranging, otherwise unset
 115             double highlight;
 116             int slot;
 117             int x, y; // position of the slot in the grid
 118             int slot_distance;
 119             QPixmap icon;
 120 #ifdef KWIN_HAVE_OPENGL_COMPOSITING
 121             GLTexture iconTexture;
 122 #endif
 123 #ifdef KWIN_HAVE_XRENDER_COMPOSITING
 124             Picture iconPicture;
 125 #endif
 126             };
 127         typedef QHash<EffectWindow*, WindowData> DataHash;
 128         DataHash mWindowData;
 129         EffectWindow* mHighlightedWindow;
 130
 131         QString windowFilter;
 132 #ifdef KWIN_HAVE_OPENGL_COMPOSITING
 133         GLTexture* filterTexture;
 134         QRect filterTextureRect;
 135         QRect filterFrameRect;
 136 #endif
 137
 138         ElectricBorder borderActivate;
 139         ElectricBorder borderActivateAll;
 140
 141 #ifdef KWIN_HAVE_XRENDER_COMPOSITING
 142         XRenderPictFormat* alphaFormat;
 143 #endif
 144     };
 145
 146 } // namespace
 147
 148 #endif