Resize effect: paints a rubber band on top of the window while resizing illustrating the geometry to change.

It requires some more adjustments so that the rubber band is also shown when window content is not shown during resize.

svn path=/trunk/KDE/kdebase/workspace/; revision=987091

effects/CMakeLists.txt

@@ -64,6 +64,7 @@ include( magiclamp/CMakeLists.txt )
 include( translucency/CMakeLists.txt )
 include( minimizeanimation/CMakeLists.txt )
 include( presentwindows/CMakeLists.txt )
+include( resize/CMakeLists.txt )
 include( scalein/CMakeLists.txt )
 include( shadow/CMakeLists.txt )
 include( showfps/CMakeLists.txt )

effects/resize/CMakeLists.txt

@@ -0,0 +1,15 @@
+#######################################
+# Effect
+
+# Source files
+set( kwin4_effect_builtins_sources ${kwin4_effect_builtins_sources}
+    resize/resize.cpp
+    )
+
+# .desktop files
+install( FILES
+    resize/resize.desktop
+    DESTINATION ${SERVICES_INSTALL_DIR}/kwin )
+
+#######################################
+# Config

effects/resize/resize.cpp

@@ -0,0 +1,126 @@
+/********************************************************************
+ KWin - the KDE window manager
+ This file is part of the KDE project.
+
+Copyright (C) 2009 Martin Gräßlin <kde@martin-graesslin.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, 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 General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*********************************************************************/
+
+#include "resize.h"
+
+#ifdef KWIN_HAVE_OPENGL_COMPOSITING
+#include <GL/gl.h>
+#endif
+#ifdef KWIN_HAVE_XRENDER_COMPOSITING
+#include <X11/Xlib.h>
+#include <X11/extensions/Xrender.h>
+#endif
+
+#include <KColorScheme>
+
+namespace KWin
+{
+
+KWIN_EFFECT( resize, ResizeEffect )
+
+ResizeEffect::ResizeEffect()
+    : m_active( false )
+    , m_resizeWindow( 0 )
+    {
+    reconfigure( ReconfigureAll );
+    }
+
+ResizeEffect::~ResizeEffect()
+    {
+    }
+
+void ResizeEffect::prePaintScreen( ScreenPrePaintData& data, int time )
+    {
+    if( m_active )
+        {
+        data.mask |= PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS;
+        }
+    effects->prePaintScreen( data, time );
+    }
+
+void ResizeEffect::paintWindow( EffectWindow* w, int mask, QRegion region, WindowPaintData& data )
+    {
+    effects->paintWindow( w, mask, region, data );
+    if( m_active && w == m_resizeWindow )
+        {
+        QRegion intersection = m_originalWindowRect.intersected( w->geometry() );
+        QRegion paintRegion = m_originalWindowRect.united( w->geometry() ).subtracted( intersection );
+        float alpha = 0.8f;
+        QColor color = KColorScheme( QPalette::Normal, KColorScheme::Selection ).background().color();
+
+#ifdef KWIN_HAVE_OPENGL_COMPOSITING
+        if( effects->compositingType() == OpenGLCompositing)
+            {
+            glPushAttrib( GL_CURRENT_BIT | GL_ENABLE_BIT );
+            glEnable( GL_BLEND );
+            glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
+            glColor4f( color.red() / 255.0f, color.green() / 255.0f, color.blue() / 255.0f, alpha );
+            glBegin( GL_QUADS );
+            foreach( const QRect &r, paintRegion.rects() )
+                {
+                glVertex2i( r.x(), r.y() );
+                glVertex2i( r.x() + r.width(), r.y() );
+                glVertex2i( r.x() + r.width(), r.y() + r.height() );
+                glVertex2i( r.x(), r.y() + r.height() );
+                }
+            glEnd();
+            glPopAttrib();
+            }
+#endif
+
+#ifdef KWIN_HAVE_XRENDER_COMPOSITING
+        if( effects->compositingType() == XRenderCompositing)
+            {
+            XRenderColor col;
+            col.alpha = int( alpha * 0xffff );
+            col.red = int( alpha * 0xffff * color.red() / 255 );
+            col.green = int( alpha * 0xffff * color.green() / 255 );
+            col.blue= int( alpha * 0xffff * color.blue() / 255 );
+            foreach( const QRect &r, paintRegion.rects() )
+                XRenderFillRectangle( display(), PictOpOver, effects->xrenderBufferPicture(),
+                    &col, r.x(), r.y(), r.width(), r.height());
+            }
+#endif
+        }
+    }
+
+void ResizeEffect::windowUserMovedResized( EffectWindow* w, bool first, bool last )
+    {
+    if( first && last )
+        {
+        // not interested in maximized
+        return;
+        }
+    if( first && w->isUserResize() && !w->isUserMove() )
+        {
+        m_active = true;
+        m_resizeWindow = w;
+        m_originalWindowRect = w->geometry();
+        w->addRepaintFull();
+        }
+    if( m_active && w == m_resizeWindow && last )
+        {
+        m_active = false;
+        m_resizeWindow = NULL;
+        effects->addRepaintFull();
+        }
+    }
+
+} // namespace

effects/resize/resize.desktop

@@ -0,0 +1,17 @@
+[Desktop Entry]
+Name=Resize Window
+Icon=preferences-system-windows-effect-resize
+Comment=Effect to outline geometry while resizing a window
+
+Type=Service
+X-KDE-ServiceTypes=KWin/Effect
+X-KDE-PluginInfo-Author=Martin Gräßlin
+X-KDE-PluginInfo-Email=kde@martin-graesslin.com
+X-KDE-PluginInfo-Name=kwin4_effect_resize
+X-KDE-PluginInfo-Version=0.1.0
+X-KDE-PluginInfo-Category=Window Management
+X-KDE-PluginInfo-Depends=
+X-KDE-PluginInfo-License=GPL
+X-KDE-PluginInfo-EnabledByDefault=false
+X-KDE-Library=kwin4_effect_builtins
+X-KDE-Ordering=60

effects/resize/resize.h

@@ -0,0 +1,47 @@
+/********************************************************************
+ KWin - the KDE window manager
+ This file is part of the KDE project.
+
+Copyright (C) 2009 Martin Gräßlin <kde@martin-graesslin.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, 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 General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*********************************************************************/
+
+#ifndef KWIN_RESIZE_H
+#define KWIN_RESIZE_H
+
+#include <kwineffects.h>
+
+namespace KWin
+{
+
+class ResizeEffect
+    : public Effect
+    {
+    public:
+        ResizeEffect();
+        ~ResizeEffect();
+        virtual void prePaintScreen( ScreenPrePaintData& data, int time );
+        virtual void paintWindow( EffectWindow* w, int mask, QRegion region, WindowPaintData& data );
+        virtual void windowUserMovedResized( EffectWindow *w, bool first, bool last );
+
+    private:
+        bool m_active;
+        EffectWindow* m_resizeWindow;
+        QRegion m_originalWindowRect;
+    };
+
+}
+
+#endif