Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdelibs@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 450 insertions, 0 deletions

diff --git a/kdeui/kpixmapregionselectorwidget.cpp b/kdeui/kpixmapregionselectorwidget.cpp
new file mode 100644
index 000000000..da2be5f92
--- /dev/null
+++ b/kdeui/kpixmapregionselectorwidget.cpp
@@ -0,0 +1,450 @@
+/* This file is part of the KDE libraries
+    Copyright (C) 2004 Antonio Larrosa <larrosa@kde.org
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
+/* NOTE: There are two copies of this .h and the .cpp file, with subtle differences.
+ * One copy is in kdelibs/kdeui, and the other copy is in kdepim/libkdepim
+ * This is because kdepim has to remain backwards compatible.  Any changes
+ * to either file should be made to the other.
+ */
+
+#include "kpixmapregionselectorwidget.h"
+#include <qpainter.h>
+#include <qcolor.h>
+#include <qimage.h>
+#include <qlayout.h>
+#include <kimageeffect.h>
+#include <kdebug.h>
+#include <klocale.h>
+#include <kpopupmenu.h>
+#include <kaction.h>
+#include <stdlib.h>
+#include <qcursor.h>
+#include <qapplication.h>
+
+KPixmapRegionSelectorWidget::KPixmapRegionSelectorWidget( QWidget *parent, 
+      const char *name) : QWidget( parent, name)
+{
+   QHBoxLayout * hboxLayout=new QHBoxLayout( this );
+   
+   hboxLayout->addStretch();
+   QVBoxLayout * vboxLayout=new QVBoxLayout( hboxLayout );
+
+   vboxLayout->addStretch();
+   m_label = new QLabel(this, "pixmapHolder");
+   m_label->setBackgroundMode( Qt::NoBackground );
+   m_label->installEventFilter( this );
+
+   vboxLayout->addWidget(m_label);
+   vboxLayout->addStretch();
+
+   hboxLayout->addStretch();
+
+   m_forcedAspectRatio=0;
+
+   m_zoomFactor=1.0;
+}
+
+KPixmapRegionSelectorWidget::~KPixmapRegionSelectorWidget()
+{
+}
+
+void KPixmapRegionSelectorWidget::setPixmap( const QPixmap &pixmap )
+{
+   Q_ASSERT(!pixmap.isNull()); //This class isn't designed to deal with null pixmaps.
+   m_originalPixmap = pixmap;
+   m_unzoomedPixmap = pixmap;
+   m_label->setPixmap( pixmap );
+   resetSelection();
+}
+
+void KPixmapRegionSelectorWidget::resetSelection()
+{
+   m_selectedRegion = m_originalPixmap.rect();
+   updatePixmap();
+}
+
+QRect KPixmapRegionSelectorWidget::selectedRegion() const
+{
+     return m_selectedRegion;
+}
+
+void KPixmapRegionSelectorWidget::setSelectedRegion(const QRect &rect)
+{
+   if (!rect.isValid()) resetSelection();
+   else 
+   {
+      m_selectedRegion=rect;
+      updatePixmap();
+
+      QRect r=unzoomedSelectedRegion();
+   }
+}
+
+void KPixmapRegionSelectorWidget::updatePixmap()
+{
+   Q_ASSERT(!m_originalPixmap.isNull()); if(m_originalPixmap.isNull()) { m_label->setPixmap(m_originalPixmap); return; }
+   if (m_selectedRegion.width()>m_originalPixmap.width()) m_selectedRegion.setWidth( m_originalPixmap.width() );
+   if (m_selectedRegion.height()>m_originalPixmap.height()) m_selectedRegion.setHeight( m_originalPixmap.height() );
+
+   QPainter painter;
+   if (m_linedPixmap.isNull())
+   {
+     m_linedPixmap = m_originalPixmap;
+
+     painter.begin(&m_linedPixmap);
+     painter.setRasterOp( Qt::XorROP );
+     painter.fillRect(0,0,m_linedPixmap.width(), m_linedPixmap.height(), 
+                  QBrush( QColor(255,255,255), Qt::BDiagPattern) );
+     painter.end();
+
+     QImage image=m_linedPixmap.convertToImage();
+     image=KImageEffect::fade(image, (float)0.4, QColor(0,0,0));
+     m_linedPixmap.convertFromImage(image);
+   } 
+
+   QPixmap pixmap = m_linedPixmap;
+
+   painter.begin(&pixmap);
+   painter.drawPixmap( m_selectedRegion.topLeft(), 
+        m_originalPixmap, m_selectedRegion );
+
+   painter.setPen( QColor(255,255,255) );
+   painter.setRasterOp( Qt::XorROP );
+
+   painter.drawRect( m_selectedRegion );
+
+   painter.end();
+
+   m_label->setPixmap(pixmap);
+}
+
+
+KPopupMenu *KPixmapRegionSelectorWidget::createPopupMenu()
+{
+   KPopupMenu *popup=new KPopupMenu(this, "PixmapRegionSelectorPopup");
+   popup->insertTitle(i18n("Image Operations"));
+   
+   KAction *action = new KAction(i18n("&Rotate Clockwise"), "rotate_cw",
+                                0, this, SLOT(rotateClockwise()),
+                                popup, "rotateclockwise");
+   action->plug(popup);
+
+   action = new KAction(i18n("Rotate &Counterclockwise"), "rotate_ccw",
+                                0, this, SLOT(rotateCounterclockwise()),
+                                popup, "rotatecounterclockwise");
+   action->plug(popup);
+ 
+/*
+   I wonder if it would be appropiate to have here an "Open with..." option to
+   edit the image (antlarr)
+*/
+   return popup;
+}
+
+void KPixmapRegionSelectorWidget::rotate(KImageEffect::RotateDirection direction)
+{
+   int w=m_originalPixmap.width();
+   int h=m_originalPixmap.height();
+   QImage img=m_unzoomedPixmap.convertToImage();
+   img= KImageEffect::rotate(img, direction);
+   m_unzoomedPixmap.convertFromImage(img);
+
+   img=m_originalPixmap.convertToImage();
+   img= KImageEffect::rotate(img, direction);
+   m_originalPixmap.convertFromImage(img);
+
+   m_linedPixmap=QPixmap();
+
+   if (m_forcedAspectRatio>0 && m_forcedAspectRatio!=1) 
+      resetSelection();
+   else
+   {
+      switch (direction)
+      {
+         case ( KImageEffect::Rotate90 ):
+            {
+              int x=h-m_selectedRegion.y()-m_selectedRegion.height();
+              int y=m_selectedRegion.x();
+              m_selectedRegion.setRect(x, y, m_selectedRegion.height(), m_selectedRegion.width() );
+              updatePixmap();
+            } break;
+         case ( KImageEffect::Rotate270 ):
+            {
+              int x=m_selectedRegion.y();
+              int y=w-m_selectedRegion.x()-m_selectedRegion.width();
+              m_selectedRegion.setRect(x, y, m_selectedRegion.height(), m_selectedRegion.width() );
+              updatePixmap();
+            } break;
+         default: resetSelection();
+      }
+   }
+}
+
+void KPixmapRegionSelectorWidget::rotateClockwise()
+{
+   rotate(KImageEffect::Rotate90);
+}
+
+void KPixmapRegionSelectorWidget::rotateCounterclockwise()
+{
+   rotate(KImageEffect::Rotate270);
+}
+
+bool KPixmapRegionSelectorWidget::eventFilter(QObject *obj, QEvent *ev)
+{
+   if ( ev->type() == QEvent::MouseButtonPress )
+   {
+      QMouseEvent *mev= (QMouseEvent *)(ev);
+      //kdDebug() << QString("click at  %1,%2").arg( mev->x() ).arg( mev->y() ) << endl;
+
+      if ( mev->button() == RightButton )
+      {
+         KPopupMenu *popup = createPopupMenu( );
+         popup->exec( mev->globalPos() );
+         delete popup;
+         return TRUE;
+      };
+
+      QCursor cursor;
+
+      if ( m_selectedRegion.contains( mev->pos() ) 
+          && m_selectedRegion!=m_originalPixmap.rect() )
+      {
+         m_state=Moving;
+         cursor.setShape( Qt::SizeAllCursor );
+      }
+      else
+      {
+         m_state=Resizing;
+         cursor.setShape( Qt::CrossCursor );
+      }
+      QApplication::setOverrideCursor(cursor);
+
+      m_tempFirstClick=mev->pos();
+      
+
+      return TRUE;
+   }
+
+   if ( ev->type() == QEvent::MouseMove )
+   {
+      QMouseEvent *mev= (QMouseEvent *)(ev);
+
+      //kdDebug() << QString("move to  %1,%2").arg( mev->x() ).arg( mev->y() ) << endl;
+      
+      if ( m_state == Resizing )
+      {
+         setSelectedRegion ( 
+              calcSelectionRectangle( m_tempFirstClick, mev->pos() ) );
+      }
+      else if (m_state == Moving )
+      {
+         int mevx = mev->x();
+         int mevy = mev->y();
+         bool mouseOutside=false;
+         if ( mevx < 0 ) 
+         {
+           m_selectedRegion.moveBy(-m_selectedRegion.x(),0);
+           mouseOutside=true;
+         }
+         else if ( mevx > m_originalPixmap.width() )
+         {
+           m_selectedRegion.moveBy(m_originalPixmap.width()-m_selectedRegion.width()-m_selectedRegion.x(),0);
+           mouseOutside=true;
+         }
+         if ( mevy < 0 ) 
+         {
+           m_selectedRegion.moveBy(0,-m_selectedRegion.y());
+           mouseOutside=true;
+         }
+         else if ( mevy > m_originalPixmap.height() )
+         {
+           m_selectedRegion.moveBy(0,m_originalPixmap.height()-m_selectedRegion.height()-m_selectedRegion.y());
+           mouseOutside=true;
+         }
+         if (mouseOutside) { updatePixmap(); return TRUE; };
+
+         m_selectedRegion.moveBy( mev->x()-m_tempFirstClick.x(),
+                                  mev->y()-m_tempFirstClick.y() );
+
+         // Check that the region has not fallen outside the image
+         if (m_selectedRegion.x() < 0)
+            m_selectedRegion.moveBy(-m_selectedRegion.x(),0);
+         else if (m_selectedRegion.right() > m_originalPixmap.width())
+            m_selectedRegion.moveBy(-(m_selectedRegion.right()-m_originalPixmap.width()),0); 
+
+         if (m_selectedRegion.y() < 0) 
+            m_selectedRegion.moveBy(0,-m_selectedRegion.y());
+         else if (m_selectedRegion.bottom() > m_originalPixmap.height()) 
+            m_selectedRegion.moveBy(0,-(m_selectedRegion.bottom()-m_originalPixmap.height()));
+
+         m_tempFirstClick=mev->pos();
+         updatePixmap();
+      } 
+      return TRUE;
+   }
+
+   if ( ev->type() == QEvent::MouseButtonRelease )
+   {
+      QMouseEvent *mev= (QMouseEvent *)(ev);
+
+      if ( m_state == Resizing && mev->pos() == m_tempFirstClick)
+         resetSelection();
+
+      m_state=None;
+      QApplication::restoreOverrideCursor(); 
+
+      return TRUE;
+   }
+
+   QWidget::eventFilter(obj, ev);
+   return FALSE;
+}
+
+QRect KPixmapRegionSelectorWidget::calcSelectionRectangle( const QPoint & startPoint, const QPoint & _endPoint )
+{
+   QPoint endPoint = _endPoint;
+   if ( endPoint.x() < 0 ) endPoint.setX(0);
+   else if ( endPoint.x() > m_originalPixmap.width() ) endPoint.setX(m_originalPixmap.width());
+   if ( endPoint.y() < 0 ) endPoint.setY(0);
+   else if ( endPoint.y() > m_originalPixmap.height() ) endPoint.setY(m_originalPixmap.height());
+   int w=abs(startPoint.x()-endPoint.x());
+   int h=abs(startPoint.y()-endPoint.y());
+
+   if (m_forcedAspectRatio>0)
+   {
+      double aspectRatio=w/double(h);
+
+      if (aspectRatio>m_forcedAspectRatio) 
+         h=(int)(w/m_forcedAspectRatio);
+      else
+         w=(int)(h*m_forcedAspectRatio);
+   }
+
+   int x,y;
+   if ( startPoint.x() < endPoint.x() )
+     x=startPoint.x();
+   else
+     x=startPoint.x()-w;
+   if ( startPoint.y() < endPoint.y() )
+     y=startPoint.y();
+   else
+     y=startPoint.y()-h;
+
+   if (x<0)
+   {
+      w+=x;
+      x=0;
+      h=(int)(w/m_forcedAspectRatio);
+
+      if ( startPoint.y() > endPoint.y() )
+        y=startPoint.y()-h;
+   }
+   else if (x+w>m_originalPixmap.width())
+   {
+      w=m_originalPixmap.width()-x;
+      h=(int)(w/m_forcedAspectRatio);
+
+      if ( startPoint.y() > endPoint.y() )
+        y=startPoint.y()-h;
+   }
+   if (y<0)
+   {
+      h+=y;
+      y=0;
+      w=(int)(h*m_forcedAspectRatio);
+
+      if ( startPoint.x() > endPoint.x() )
+        x=startPoint.x()-w;
+   }
+   else if (y+h>m_originalPixmap.height())
+   {
+      h=m_originalPixmap.height()-y;
+      w=(int)(h*m_forcedAspectRatio);
+
+      if ( startPoint.x() > endPoint.x() )
+        x=startPoint.x()-w;
+   }
+
+   return QRect(x,y,w,h);
+}
+
+QRect KPixmapRegionSelectorWidget::unzoomedSelectedRegion() const
+{
+  return QRect((int)(m_selectedRegion.x()/m_zoomFactor),
+               (int)(m_selectedRegion.y()/m_zoomFactor),
+               (int)(m_selectedRegion.width()/m_zoomFactor),
+               (int)(m_selectedRegion.height()/m_zoomFactor));
+}
+
+QImage KPixmapRegionSelectorWidget::selectedImage() const
+{
+   QImage origImage=m_unzoomedPixmap.convertToImage();
+   return origImage.copy(unzoomedSelectedRegion());
+}
+
+void KPixmapRegionSelectorWidget::setSelectionAspectRatio(int width, int height)
+{
+   m_forcedAspectRatio=width/double(height);
+}
+
+void KPixmapRegionSelectorWidget::setFreeSelectionAspectRatio()
+{
+   m_forcedAspectRatio=0;
+}
+
+void KPixmapRegionSelectorWidget::setMaximumWidgetSize(int width, int height)
+{
+   m_maxWidth=width;
+   m_maxHeight=height;
+
+   m_originalPixmap=m_unzoomedPixmap;
+   if (m_selectedRegion == m_originalPixmap.rect()) m_selectedRegion=QRect();
+
+//   kdDebug() << QString(" original Pixmap :") << m_originalPixmap.rect() << endl;
+//   kdDebug() << QString(" unzoomed Pixmap : %1 x %2 ").arg(m_unzoomedPixmap.width()).arg(m_unzoomedPixmap.height()) << endl;
+
+   if ( !m_originalPixmap.isNull() &&
+       ( m_originalPixmap.width() > m_maxWidth || 
+         m_originalPixmap.height() > m_maxHeight ) )
+   {
+         /* We have to resize the pixmap to get it complete on the screen */
+         QImage image=m_originalPixmap.convertToImage();
+         m_originalPixmap.convertFromImage( image.smoothScale( width, height, QImage::ScaleMin ) );
+         double oldZoomFactor = m_zoomFactor;
+         m_zoomFactor=m_originalPixmap.width()/(double)m_unzoomedPixmap.width();
+
+         if (m_selectedRegion.isValid())
+         {
+            m_selectedRegion=
+                  QRect((int)(m_selectedRegion.x()*m_zoomFactor/oldZoomFactor),
+                        (int)(m_selectedRegion.y()*m_zoomFactor/oldZoomFactor),
+                        (int)(m_selectedRegion.width()*m_zoomFactor/oldZoomFactor),
+                        (int)(m_selectedRegion.height()*m_zoomFactor/oldZoomFactor) );
+         }
+   }
+   
+   if (!m_selectedRegion.isValid()) m_selectedRegion = m_originalPixmap.rect();
+
+   m_linedPixmap=QPixmap();
+   updatePixmap();
+   resize(m_label->width(), m_label->height());
+}
+
+#include "kpixmapregionselectorwidget.moc"