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subalbumsWidget.cpp

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00001 //==============================================
00002 //  copyright            : (C) 2003 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 //  As a special exception, Will Stokes gives permission to 
00011 //  link this program with Qt non-commercial edition, and 
00012 //  distribute the resulting executable, without including the 
00013 //  source code for the Qt non-commercial edition in the 
00014 //  source distribution. 
00015 //==============================================
00016 
00017 //Systemwide includes
00018 #include <qwidget.h>
00019 #include <qlayout.h>
00020 #include <qlabel.h>
00021 #include <qfont.h>
00022 #include <qpixmap.h>
00023 #include <qpushbutton.h>
00024 
00025 //Projectwide includes
00026 #include "subalbumsWidget.h"
00027 #include "subalbumPreviewWidget.h"
00028 #include "subalbumsIconView.h"
00029 #include "questionDialog.h"
00030 #include "layoutWidget.h"
00031 #include "window.h"
00032 #include "titleWidget.h"
00033 #include "../backend/album.h"
00034 #include "../backend/subalbum.h"
00035 #include "../config.h"
00036 
00037 #include <iostream.h>
00038 
00039 //==============================================
00040 SubalbumsWidget::SubalbumsWidget(QWidget *parent, 
00041                                  const char* name ) : 
00042                                  QWidget(parent,name)
00043 {
00044   //set layout pointer
00045   layout = (LayoutWidget*)parent;
00046 
00047   //create subalbums text
00048   subalbumsText = new QLabel( this );
00049   subalbumsText->setText( "Subalbums: " );
00050   subalbumsText->setFont( QFont( "Times", 12, QFont::Bold ) );
00051 
00052   //create subalbums iconview
00053   subalbums = new SubalbumsIconView( this );
00054   
00055   //establish a top-down view such that the scrollbar is always placed on the right
00056   subalbums->setArrangement( QIconView::LeftToRight );
00057   subalbums->setVScrollBarMode( QScrollView::AlwaysOn );
00058 
00059   //only allow one subalbum to be selected at a time
00060   subalbums->setSelectionMode( QIconView::Single ) ;
00061 
00062   //set auto-scroll off for drag-n-drop
00063   subalbums->setDragAutoScroll(true);
00064   subalbums->setAcceptDrops(true);
00065 
00066   //connect drop event on iconview to reorder slot
00067   connect( subalbums, SIGNAL(itemHasMoved()), SLOT(reorder()) );  
00068 
00069   //connect selectionChanged signal to updateSubalbumLayout method
00070   connect( subalbums, SIGNAL(selectionChanged(QIconViewItem*)),
00071            SLOT(updateSubalbumLayout(QIconViewItem*)) );
00072 
00073   //connect rightButtonClicked signal to updateSubalbumLayout method
00074   connect( subalbums, SIGNAL(rightButtonClicked(QIconViewItem*, const QPoint&)),
00075            SLOT(updateSubalbumLayout(QIconViewItem*)) );
00076            
00077   //create create/delete subalbum buttons
00078   createSubalbumImage = new QPixmap( QString(IMAGE_PATH)+"create.png" );
00079   
00080   createSubalbum = new QPushButton( this );
00081   createSubalbum->setPixmap( *createSubalbumImage );
00082   createSubalbum->setSizePolicy( QSizePolicy::Maximum, QSizePolicy::Maximum );  
00083   connect( createSubalbum, SIGNAL(clicked()), SLOT(createAction()) );
00084 
00085   deleteSubalbumImage = new QPixmap( QString(IMAGE_PATH)+"delete.png" );
00086   
00087   deleteSubalbum = new QPushButton( this );
00088   deleteSubalbum->setPixmap( *deleteSubalbumImage );
00089   deleteSubalbum->setSizePolicy( QSizePolicy::Maximum, QSizePolicy::Maximum );  
00090   deleteSubalbum->setEnabled(false);
00091   connect( deleteSubalbum, SIGNAL(clicked()), SLOT(deleteAction()) );
00092 
00093   //place label, listbox, and buttons in grid
00094   grid = new QGridLayout( this, 3, 2, 0 );
00095   grid->addMultiCellWidget( subalbumsText, 0, 0, 0, 1 );
00096   grid->addMultiCellWidget( subalbums, 1, 1, 0, 1 );
00097   grid->addWidget( createSubalbum, 2, 0);
00098   grid->addWidget( deleteSubalbum, 2, 1);
00099 
00100   //set listbox to grow
00101   grid->setRowStretch( 1, 1 );
00102 
00103   //set the background of the widget to be white
00104   setPaletteBackgroundColor( QColor(255, 255, 255) );
00105   
00106   //nothign selected at first
00107   cachedSelection = NULL;
00108 }
00109 //==============================================
00110 SubalbumsWidget::~SubalbumsWidget()
00111 {
00112   delete createSubalbumImage;
00113   delete deleteSubalbumImage;
00114 }
00115 //==============================================
00116 void SubalbumsWidget::createAction()
00117 {
00118   Subalbum* n = new Subalbum(layout->getWindow()->getTitle()->getAlbum(),
00119                                              layout->getWindow()->getTitle()->getAlbum()->getNumSubalbums()+1);
00120   SubalbumPreviewWidget* p = new SubalbumPreviewWidget( subalbums, n );
00121   p->setDropEnabled(true);
00122    
00123   layout->getWindow()->getTitle()->getAlbum()->appendSubalbum( n );
00124 }
00125 //==============================================
00126 void SubalbumsWidget::deleteAction()
00127 {
00128   //if an item is selected it remove it
00129   if(subalbums->currentItem() != NULL)
00130   { 
00131     //check if user is sure
00132     QuestionDialog sure( "Delete subalbum?",
00133                          "Once deleted a subalbum and it's contents cannot be brought back unless a saved copy of the album exists.",
00134                          "warning.png",
00135                          this );
00136     //if user say yes then delete subalbum and refresh
00137     if(sure.exec())  
00138     {
00139       //delete the subalbum
00140       Subalbum* s = ((SubalbumPreviewWidget*) subalbums->currentItem())->getSubalbum();
00141       delete subalbums->currentItem();
00142 
00143       //remove subalbum from backend album object
00144       layout->getWindow()->getTitle()->getAlbum()->removeSubalbum( s );
00145       
00146       //rearrange the items in the grid
00147       subalbums->arrangeItemsInGrid();
00148       
00149       //update which subalbum is shown in the layout area
00150       updateSubalbumLayout(subalbums->firstItem(), false);
00151       
00152       //check if any subalbums selected, if not deactivate delete button
00153       if(subalbums->currentItem() == NULL || !subalbums->currentItem()->isSelected())
00154       {
00155           deleteSubalbum->setEnabled(false);
00156       }
00157       
00158       //no images themselves selected so disable set button
00159       layout->getWindow()->getTitle()->setSetButtonState(false);
00160     }
00161   }
00162 }
00163 //==============================================
00164 void SubalbumsWidget::updateSubalbumLayout( QIconViewItem* selection)
00165 {
00166   //if application busy ignore action
00167   if(layout->getWindow()->getTitle()->getBusy())
00168   {
00169     if(cachedSelection == NULL)
00170       subalbums->clearSelection();
00171     else
00172       subalbums->setSelected(cachedSelection, true);
00173     return;
00174   }
00175   
00176   //cache selection
00177   cachedSelection = selection;
00178   
00179   //activate/disable delete button depending on if something is currently selected or not
00180   if(selection == NULL)
00181     deleteSubalbum->setEnabled(false);
00182   else
00183     deleteSubalbum->setEnabled(true);
00184 
00185   updateSubalbumLayout(selection, true);
00186 }
00187 //==============================================
00188 void SubalbumsWidget::updateSubalbumLayout( QIconViewItem* selection, bool oldExists)
00189 {
00190   //hide photo edit dialog in case we were just editing a photo
00191   layout->stopEdit(oldExists);
00192 
00193   if(selection == NULL)
00194     layout->updateSubalbum( NULL, oldExists );
00195   else
00196   {
00197     layout->updateSubalbum(((SubalbumPreviewWidget*)selection)->getSubalbum(), oldExists);
00198   }
00199 }
00200 //==============================================
00201 void SubalbumsWidget::updateSubalbumName(const QString& val)
00202 {
00203   //if an item is selected
00204   if(subalbums->currentItem() != NULL)
00205   { 
00206     subalbums->currentItem()->setText(val);
00207   }
00208   subalbums->arrangeItemsInGrid();
00209 }
00210 //==============================================
00211 void SubalbumsWidget::updateSubalbumThumbnail( QPixmap* val)
00212 {
00213   //if an item is selected
00214   if(subalbums->currentItem() != NULL)
00215   { 
00216     subalbums->currentItem()->setPixmap( *val );
00217   }
00218   subalbums->arrangeItemsInGrid();
00219 }
00220 //==============================================
00221 void SubalbumsWidget::reorder()
00222 {
00223   //so item has been moved, reorder linked list of items as necessary
00224   subalbums->sort( true );
00225   subalbums->arrangeItemsInGrid();
00226   
00227   //get handle on backend album object
00228   Album* albm = layout->getWindow()->getTitle()->getAlbum();
00229   
00230   //sync lists
00231   albm->syncSubalbumList((SubalbumPreviewWidget*)subalbums->firstItem());
00232 }
00233 //==============================================
00234 void SubalbumsWidget::refresh()
00235 {
00236   //delete all previous entries
00237   QIconViewItem* current = subalbums->firstItem();
00238   QIconViewItem* temp;
00239   while(current != NULL)
00240   {
00241     //get next pointer  
00242     temp = current->nextItem();
00243     
00244     //delete widget
00245     delete current;
00246     current = temp;
00247   }
00248 
00249   //insert all new subalums
00250   Subalbum* curSubalbum = layout->getWindow()->getTitle()->getAlbum()->getFirstSubalbum();
00251   while( curSubalbum != NULL)
00252   {
00253     (void) new SubalbumPreviewWidget( subalbums, curSubalbum );
00254     curSubalbum = curSubalbum->getNext();
00255   }
00256   
00257   //refresh layout
00258   subalbums->arrangeItemsInGrid();
00259   updateSubalbumLayout( subalbums->firstItem(), false );
00260   
00261   //auto select first item
00262   if(subalbums->firstItem() != NULL)
00263     subalbums->setSelected( subalbums->firstItem(), TRUE);
00264 }
00265 //==============================================
00266 LayoutWidget* SubalbumsWidget::getParent()
00267 {
00268   return layout;
00269 }
00270 //==============================================
00271 void SubalbumsWidget::updateButtons(bool enable)
00272 {
00273   if(!enable)
00274   {
00275     buttonsState = createSubalbum->isEnabled();
00276     createSubalbum->setEnabled(enable);
00277     deleteSubalbum->setEnabled(enable);  
00278   }
00279   else
00280   {
00281     createSubalbum->setEnabled(enable);
00282     deleteSubalbum->setEnabled(buttonsState);  
00283   }
00284 }
00285 //==============================================

Generated on Tue Jun 10 23:41:21 2003 for AlbumShaper by doxygen 1.3.1