subalbumPreviewWidget.cpp

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00001 //==============================================
00002 //  copyright            : (C) 2003-2005 by Will Stokes
00003 //==============================================
00004 //  This program is free software; you can redistribute it
00005 //  and/or modify it under the terms of the GNU General
00006 //  Public License as published by the Free Software
00007 //  Foundation; either version 2 of the License, or
00008 //  (at your option) any later version.
00009 //==============================================
00010 
00011 //Systemwide includes
00012 #include <qpixmap.h>
00013 #include <qstring.h>
00014 #include <qpainter.h>
00015 #include <qiconview.h>
00016 #include <qfontmetrics.h>
00017 #include <qapplication.h>
00018 
00019 //Projectwide includes
00020 #include "subalbumPreviewWidget.h"
00021 #include "subalbumsIconView.h"
00022 #include "../backend/subalbum.h"
00023 #include "../backend/photo.h"
00024 #include "../backend/tools/imageTools.h"
00025 #include "subalbumsWidget.h"
00026 #include "layoutWidget.h"
00027 #include "subalbumWidget.h"
00028 #include "photoPreviewWidget.h"
00029 #include "../backend/tools/guiTools.h"
00030 
00031 #include "../backend/album.h"
00032 
00033 //==============================================
00034 SubalbumPreviewWidget::SubalbumPreviewWidget( SubalbumsIconView* parent, Subalbum* salbum )
00035           : QIconViewItem(parent, 
00036                           clipText( salbum->getName(), 2, parent->getTextWidth()),
00037                           *salbum->getRepresentativeImage(MEDIUM) )
00038 {         
00039   mousedOver = false;
00040   this->parent = parent;
00041   subalbum = salbum;
00042   
00043   //initialize item rectangle
00044   initializeItemRect();
00045 }
00046 //==============================================
00047 Subalbum* SubalbumPreviewWidget::getSubalbum()
00048 {
00049   return subalbum;
00050 }
00051 //==============================================
00052 void SubalbumPreviewWidget::paintFocus( QPainter*, const QColorGroup& ) { }
00053 //==============================================
00054 void SubalbumPreviewWidget::paint( QPainter *p )
00055 {
00056   paintItem( p, QColorGroup() );
00057 }
00058 //==============================================
00059 void SubalbumPreviewWidget::paintItem( QPainter* p, const QColorGroup&)
00060 {
00061   QColor lightLightBlue( 152, 180, 226 );
00062   QColor darkLightBlue(193, 210, 238);
00063   QColor darkBlue(35, 75, 139);
00064   QColor background = darkLightBlue;
00065   
00066   //resize old static buffer to new needed size, fill with widget background color
00067   static QPixmap buffer;
00068   QRect r = rect();
00069   QSize newSize = r.size().expandedTo(buffer.size() );
00070   buffer.resize(newSize);
00071   buffer.fill( background );
00072 
00073   //construct painter for buffer
00074   QPainter bufferPainter(&buffer, this);
00075   bufferPainter.translate( -r.x(), -r.y() );
00076 
00077   //turn off clipping to make painting operations faster
00078   bufferPainter.setClipping(false);
00079   
00080   //paint mouse over or actual selection color
00081   bool paintRect = false;
00082   QColor paintColor;
00083   if(isSelected()) { paintColor = darkBlue; paintRect = true; }
00084   else if(mousedOver) { paintColor = lightLightBlue; paintRect = true; }
00085 
00086   if(paintRect)
00087   {
00088      //first paint alpha blended edges
00089 
00090      //-------------------------
00091      //top and bottom edges
00092      QRect r2 = r;
00093      r2.setLeft( r.left() + 4);
00094      r2.setRight( r.right() - 4);
00095      r2.setTop( r.top() );
00096      r2.setBottom( r.bottom() );
00097      bufferPainter.fillRect( r2, blendColors( paintColor, background, 0.40 ) );
00098 
00099      r2.setLeft( r2.left() + 1);
00100      r2.setRight( r2.right() - 1);
00101      bufferPainter.fillRect( r2, blendColors( paintColor, background, 0.67 ) );
00102      //-------------------------
00103      //inner top and bottom edges
00104      r2.setLeft( r2.left() - 3);
00105      r2.setRight( r2.right() + 3);
00106      r2.setTop( r2.top() + 1 );
00107      r2.setBottom( r2.bottom() - 1);
00108      bufferPainter.fillRect( r2, blendColors( paintColor, background, 0.40 ) );
00109 
00110      r2.setLeft( r2.left() + 1);
00111      r2.setRight( r2.right() - 1);
00112      bufferPainter.fillRect( r2, blendColors( paintColor, background, 0.67 ) );
00113      //-------------------------
00114      //left and right inner edges
00115      r2.setLeft( r2.left() - 2);
00116      r2.setRight( r2.right() + 2);
00117      r2.setTop( r2.top() + 1 );
00118      r2.setBottom( r2.bottom() - 1);
00119      bufferPainter.fillRect( r2, blendColors( paintColor, background, 0.40) );
00120 
00121      r2.setTop( r2.top() + 1);
00122      r2.setBottom( r2.bottom() - 1);
00123      bufferPainter.fillRect( r2, blendColors( paintColor, background, 0.67) );
00124      //-------------------------
00125      // middle region
00126      r2.setLeft( r2.left() - 1 );
00127      r2.setRight( r2.right() + 1 );
00128      r2.setTop( r2.top() + 1);
00129      r2.setBottom( r2.bottom() - 1);
00130      bufferPainter.fillRect( r2, blendColors( paintColor, background, 0.40) );
00131 
00132      r2.setTop( r2.top() + 1);
00133      r2.setBottom( r2.bottom() - 1);
00134      bufferPainter.fillRect( r2, blendColors( paintColor, background, 0.67) );
00135      //-------------------------
00136      //second paint inner selection
00137      r2 = r;
00138      r2.setLeft( r.left() + 1);
00139      r2.setRight( r.right() - 1);
00140      r2.setTop( r.top() + 4 );
00141      r2.setBottom( r.bottom() - 4);
00142      bufferPainter.fillRect( r2, paintColor );
00143 
00144      r2.setLeft( r2.left() + 1);
00145      r2.setRight( r2.right() - 1);
00146      r2.setTop( r2.top() - 2 );
00147      r2.setBottom( r2.bottom() + 2 );
00148      bufferPainter.fillRect( r2, paintColor );
00149 
00150      r2.setLeft( r2.left() + 2);
00151      r2.setRight( r2.right() - 2);
00152      r2.setTop( r2.top() - 1 );
00153      r2.setBottom( r2.bottom() + 1 );
00154      bufferPainter.fillRect( r2, paintColor );
00155   }
00156 
00157   //paint pixmap
00158   bufferPainter.drawPixmap( x()+4 , y() + 4, *pixmap());
00159 
00160   //paint text
00161   int align = AlignLeft | AlignTop | BreakAnywhere;
00162   if(isSelected())
00163     bufferPainter.setPen( white );
00164   else
00165     bufferPainter.setPen( black );
00166   bufferPainter.drawText( x() + 4 + pixmapRect().width(),
00167                                         y() + 4,
00168                                         textRect().width(), textRect().height(),
00169                                         align, text() );
00170 
00171   //draw buffer to screen
00172   p->drawPixmap( x(), y(), buffer );
00173 }
00174 //==============================================
00175 void SubalbumPreviewWidget::dropped( QDropEvent *e, const QValueList<QIconDragItem> & )
00176 {
00177   //if source is not from the application then ignore
00178   if(e->source() == NULL)
00179     return;
00180     
00181   //if source of drop event is from this widget when user is attempting to
00182   //rearrange subalbums, move currently selected item to
00183   //approximately where the cursor is before rearranging items
00184   if(e->source()->parentWidget() == parent)
00185   {
00186     if(e->pos().y() < (y() + (height()/2)))
00187     {
00188       parent->currentItem()->move(x(), y() - 1);
00189     }
00190     else
00191     {
00192       parent->currentItem()->move(x(), y() + (height()/2) + 1);
00193     }
00194   }
00195   //else check to see if user dropped photo(s) on subalbum
00196   else
00197   {
00198     //if the source of the items is the current subalbum icon view and
00199     //this is a different subalbum then
00200     //move photos from that subalbum to this one
00201     if(
00202          !isSelected() &&
00203          (
00204            e->source()->parentWidget() ==
00205            ((LayoutWidget*)(parent->parentWidget()->parentWidget()))->getSubalbum()->getPhotos()
00206          )
00207        )
00208     {
00209       //iterate over all selected photos, inserting each
00210       //into this subalbum, removing from old subalbum,
00211       //and deleting old photo widgets
00212       SubalbumWidget* oldSubalbumWidget = ((LayoutWidget*)(parent->parentWidget()->parentWidget()))->getSubalbum();
00213       Subalbum* oldSubalbum = oldSubalbumWidget->getSubalbum();
00214       QIconViewItem* current = oldSubalbumWidget->getPhotos()->firstItem();
00215       while(current != NULL)
00216       {
00217        //found a selected photo
00218         if(current->isSelected())
00219         {
00220           //get pointer to photo
00221           Photo* photo = ((PhotoPreviewWidget*)current)->getPhoto();
00222 
00223           //remove photo from that subalbum
00224           oldSubalbum->photoMoved(photo);
00225 
00226           //add photo to this subalbum
00227           subalbum->addPhoto(photo);
00228 
00229           //delete photo widget and rearrange photos
00230           QIconViewItem* temp = current;
00231           current = current->nextItem();
00232           delete temp;
00233         }
00234         else
00235         {
00236           current = current->nextItem();
00237         }
00238       } //end while
00239 
00240       //reannarge photos once all photos have been removed
00241       oldSubalbumWidget->getPhotos()->arrangeItemsInGrid();
00242     }
00243   }
00244 }
00245 //==============================================
00246 bool SubalbumPreviewWidget::acceptDrop( const QMimeSource *) const
00247 {
00248   return true;
00249 }
00250 //==============================================
00251 int SubalbumPreviewWidget::compare ( QIconViewItem * i ) const
00252 {
00253   if(pos().y() >= i->pos().y())
00254   {  return 1; }
00255   else
00256   { return -1; }
00257 }
00258 //==============================================
00259 QPixmap* SubalbumPreviewWidget::createSubalbumPixmap( QString imageName )
00260 {
00261   //load image
00262   QImage icon(imageName);
00263 
00264   //if null then bail immediately
00265   if( icon.isNull() )
00266     return NULL;
00267   
00268   //----------------------------------------------
00269   //resize image based on text properties. Find ideal hight
00270   QFontMetrics fm( qApp->font() );
00271 
00272   //ideal image height is two text lines, 1 pixel inbetween
00273   int idealImageHeight = fm.leading() + 2*fm.height();
00274 
00275  //ideal image width assuming 4:3 aspect ratio
00276  int idealImageWidth = (4 * idealImageHeight ) / 3;
00277  //----------------------------------------------
00278  //resize image to fit within bounding rectangle, pad and center as necessary
00279  int actualImageWidth = 0;
00280  int actualImageHeight = 0;
00281  calcScaledImageDimensions( icon.width(), icon.height(),
00282                             idealImageWidth, idealImageHeight,
00283                             actualImageWidth, actualImageHeight );
00284 
00285   //if off by one pixel fudge it so icon perfectly cenetered
00286   if(actualImageHeight == idealImageHeight - 1)
00287   {
00288     actualImageHeight = idealImageHeight;
00289   }
00290 
00291   QImage scaledIcon= icon.smoothScale( actualImageWidth, actualImageHeight );
00292   QImage* paddedScaledIcon = new QImage(idealImageWidth, idealImageHeight, scaledIcon.depth());
00293   paddedScaledIcon->setAlphaBuffer(true);
00294 
00295   //make entire image transparent
00296   int x, y;
00297   for(x=0; x< idealImageWidth; x++)
00298   {
00299     for(y=0; y<idealImageHeight; y++)
00300     {
00301       paddedScaledIcon->setPixel(x,y, qRgba(255, 255, 255,0) );
00302     }
00303   }
00304 
00305   //paint image in center of padded region
00306   int xDiff = idealImageWidth - actualImageWidth;
00307   int yDiff = idealImageHeight  - actualImageHeight;
00308   int x2 = 0;
00309   for(x= xDiff/2; x < (xDiff/2) + actualImageWidth; x++)
00310   {
00311     int y2 = 0;
00312     for(y= yDiff/2; y < (yDiff/2) + actualImageHeight; y++)
00313     {
00314       paddedScaledIcon->setPixel(x, y, scaledIcon.pixel(x2, y2));
00315        y2++;
00316     }
00317     x2++;
00318   }
00319 
00320   //clip corners if image takes up full width
00321   if(xDiff == 0)
00322   {
00323       paddedScaledIcon->setPixel(0, 0, qRgba(255, 0,0,0) );
00324       paddedScaledIcon->setPixel(idealImageWidth-1, 0, qRgba(255, 0,0,0) );
00325       paddedScaledIcon->setPixel(0, idealImageHeight-1, qRgba(255, 0,0,0) );
00326       paddedScaledIcon->setPixel(idealImageWidth-1, idealImageHeight-1, qRgba(255, 0,0,0) );
00327   }
00328 
00329   QPixmap* padddedScaledPix = new QPixmap( paddedScaledIcon->width(), paddedScaledIcon->height() );
00330   padddedScaledPix->convertFromImage( *paddedScaledIcon );
00331   delete paddedScaledIcon;
00332   return padddedScaledPix;
00333  //----------------------------------------------
00334 }
00335 //==============================================
00336 void SubalbumPreviewWidget::calcRect( const QString & text_ )
00337 {  
00338   //setup default dimensions
00339   QIconViewItem::calcRect( text_ );  
00340 
00341   //update using init method
00342   initializeItemRect();
00343 }  
00344 //==============================================
00345 void SubalbumPreviewWidget::initializeItemRect()
00346 {
00347   //reset pixmap rect
00348   QRect pr = pixmapRect();
00349   int prWidth  = pr.width();
00350   int prHeight = pr.height();
00351   pr.setTopLeft( QPoint(3,3) );
00352   pr.setBottomRight( QPoint(pr.left()+prWidth, pr.top()+prHeight) );
00353   setPixmapRect( pr );
00354   
00355   //reset text rect
00356   int textWidth = parent->getTextWidth();
00357   QRect tr = textRect();
00358   tr.setTop( pixmapRect().top() );
00359   tr.setBottom( pixmapRect().bottom() );
00360   tr.setLeft( pixmapRect().right() + 2 );
00361   tr.setRight( tr.left() + textWidth );
00362   setTextRect( tr );
00363   
00364   //reset item rect using pixmap and text rect dimensions
00365   int itemW = 3 + pixmapRect().width() + (tr.left() - pr.right()) + textRect().width() + 3;
00366   int itemH = 3 + pixmapRect().height() + 3;
00367   setItemRect( QRect( pixmapRect().left() - 3, pixmapRect().top() - 3, itemW, itemH ) );
00368 }
00369 //==============================================
00370 void SubalbumPreviewWidget::setText ( const QString & text )
00371 {
00372   QIconViewItem::setText( clipText(text, 2, parent->getTextWidth()), false );
00373 }
00374 //==============================================
00375 void SubalbumPreviewWidget::setMousedOver(bool val)
00376 {
00377   mousedOver = val;
00378 }
00379 //==============================================
00380 QColor SubalbumPreviewWidget::blendColors( QColor a, QColor b, double alpha)
00381 {
00382   double alpha2 = 1-alpha;
00383   return QColor( (int)(alpha*a.red() + alpha2*b.red()),
00384                           (int)(alpha*a.green() + alpha2*b.green()),
00385                           (int)(alpha*a.blue() + alpha2*b.blue()) );
00386 }
00387 //==============================================

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