#include <presentationWidget.h>

Inheritance diagram for SlideshowWidget:

Collaboration diagram for SlideshowWidget:

Signals
void	endSlideshow ()
Public Member Functions
	SlideshowWidget (QWidget parent=0, const char name=0, WFlags f=0)
void	beginSlideshow (Album albm, Subalbum startCollection=NULL, Photo *startPhoto=NULL)
Subalbum *	getCurCollection ()
	returns a pointer to the currently visible collection
Photo *	getCurPhoto ()
	returns a pointer to the currently visible photo
Protected Member Functions
void	paintEvent (QPaintEvent *)
void	keyPressEvent (QKeyEvent *e)
void	mousePressEvent (QMouseEvent *e)
void	mouseMoveEvent (QMouseEvent *e)
void	contextMenuEvent (QContextMenuEvent *e)
void	showCoverPage ()
void	showCollectionPage (Subalbum *subalbum)
void	loadPhoto ()
void	showPhoto ()
void	refreshScreen ()
void	paintOverlaidControls ()
void	exchangePhotos ()
Private Slots
void	animate ()
void	advancePhoto ()
void	backupPhoto ()
void	skipToFirstPhoto ()
void	skipToLastPhoto ()
void	advanceCollection ()
void	backupCollection ()
void	hideMouse ()
void	toggleAutoPlay ()
void	stop ()
void	speedUp ()
void	slowDown ()
void	increaseTextSize ()
void	decreaseTextSize ()
void	contextMenuHiding ()
Private Attributes
QString	themePath
Album *	curAlbum
Subalbum *	curCollection
Photo *	curPhoto
int	photoNum
int	collectionNum
bool	photoLoaded
QImage	scaledImage1
QImage	scaledImage2
QImage *	currImage
QImage *	prevImage
QImage	Top_TextBorder
QImage	Bottom_TextBorder
QImage	Left_TextBorder
QImage	Right_TextBorder
QImage	TL_TextBorder
QImage	TR_TextBorder
QImage	BL_TextBorder
QImage	BR_TextBorder
QPixmap *	paintBufferPrev
QPixmap *	paintBufferCurr
QPixmap	paintBuffer1
QPixmap	paintBuffer2
QPixmap	screenBuffer
QImage	speed1
QImage	speed2
QImage	speed4
QImage	speed8
QImage	pauseInterface
QImage	playInterface
QImage	interfaceAlphaMask
int	screenWidth
int	screenHeight
int	lastStep
int	step
double	initDelay
double	minDelay
double	delay
double	accel
QTimer *	autoPlayTimer
int	autoPlayDelay
bool	autoPlay
bool	displayAutoPlayDelay
QTimer *	animatingTimer
QTime	lastTime
QTime	currentTime
bool	animating
ANIMATION_TYPE	type
QMutex	animatingMutex
bool	displayDebugMessages
int	fontSize
QTimer *	mouseCursorTimer
bool	mouseShown
bool	contextMenuShown
bool	contextMenuHidingBool

Detailed Description

Definition at line 39 of file presentationWidget.h.

Constructor & Destructor Documentation

SlideshowWidget::SlideshowWidget	(	QWidget *	parent = `0`,
		const char *	name = `0`,
		WFlags	f = `0`
	)

Definition at line 36 of file presentationWidget.cpp.

References accel, advancePhoto(), animate(), animating, animatingTimer, autoPlay, autoPlayDelay, autoPlayTimer, collectionNum, contextMenuHidingBool, contextMenuShown, curAlbum, curCollection, curPhoto, currImage, displayAutoPlayDelay, displayDebugMessages, hideMouse(), IMAGE_PATH, IMMEDIATE, initDelay, interfaceAlphaMask, minDelay, mouseCursorTimer, paintBuffer1, paintBuffer2, paintBufferCurr, paintBufferPrev, pauseInterface, photoLoaded, photoNum, playInterface, prevImage, scaledImage1, scaledImage2, screenBuffer, screenHeight, screenWidth, speed1, speed2, speed4, speed8, and type.

                                                                              : QWidget(parent,name,f)
{
  //to prevent flicker, never erase to a background color
  setBackgroundMode( Qt::NoBackground);
  
  //set pointers to null
  curAlbum = NULL;
  curCollection = NULL;
  collectionNum = -1;
  curPhoto = NULL;
  photoNum = -1;
  
  //no photo loaded yet  
  photoLoaded = false;

  //not animating by default
  animating = false;
  
  //default animation method is immediate
  type = IMMEDIATE;
  
  //set cur and prev pointers to the two scaled images. these
  //pointers will be exchanged when loading new images
  currImage = &scaledImage1;
  prevImage = &scaledImage2;

  //set delay defaults
  initDelay = 3; //3
  accel = 0.1; // 0.7
  minDelay = 1; //0.01

  //setup autoplay defaults, autoPlay should be set 
  //to true/false every time we begin a new slideshow
  autoPlayDelay = 4;
  autoPlay = true;
  displayAutoPlayDelay = false;
  
  displayDebugMessages = false;
  //---------------
  //create timer objects and setup signals
  animatingTimer = new QTimer();
  connect(animatingTimer, SIGNAL(timeout()), this, SLOT(animate()) );

  autoPlayTimer = new QTimer();
  connect(autoPlayTimer, SIGNAL(timeout()), this, SLOT(advancePhoto()) );
  
  mouseCursorTimer = new QTimer();
  connect(mouseCursorTimer, SIGNAL(timeout()), this, SLOT(hideMouse()) );
  //---------------
  //ensure pixmap are same size as screen
  QDesktopWidget *desktop = QApplication::desktop();
  screenWidth = desktop->screenGeometry().width();
  screenHeight = desktop->screenGeometry().height();
  paintBuffer1.resize( screenWidth, screenHeight );
  paintBuffer2.resize( screenWidth, screenHeight );
  screenBuffer.resize( screenWidth, screenHeight );
  screenBuffer.fill( black );
  
  paintBufferPrev = &paintBuffer1;
  paintBufferCurr = &paintBuffer2;
  
  //load speed icons
  speed1.load( QString(IMAGE_PATH)+"miscImages/cheetah.png" );
  speed2.load( QString(IMAGE_PATH)+"miscImages/rabbit.png" );
  speed4.load( QString(IMAGE_PATH)+"miscImages/turtle.png" );
  speed8.load( QString(IMAGE_PATH)+"miscImages/snail.png" );
  
  //load play and pause control interfaces
  playInterface.load( QString(IMAGE_PATH)+"buttonIcons/playPresentation.png" );
  pauseInterface.load( QString(IMAGE_PATH)+"buttonIcons/pausePresentation.png" );
  interfaceAlphaMask = pauseInterface.createAlphaMask();
  
  //by default no context menu object exists
  contextMenuShown = false;
  contextMenuHidingBool = false;

  //set widget to accept keyboard and mouse focus  
  setFocusPolicy(QWidget::StrongFocus);
}

Member Function Documentation

void SlideshowWidget::advanceCollection ( ) [private, slot]

Definition at line 728 of file presentationWidget.cpp.

References collectionNum, curAlbum, curCollection, curPhoto, exchangePhotos(), Subalbum::getFirst(), Album::getFirstSubalbum(), Subalbum::getNext(), IMMEDIATE, loadPhoto(), photoNum, SCROLL_RIGHT, SCROLL_UP, type, and USE_ANIMATION.

Referenced by advancePhoto(), contextMenuEvent(), keyPressEvent(), and mousePressEvent().

{
  if(USE_ANIMATION)
  {
    if(curCollection->getNext() == NULL &&
       curCollection == curAlbum->getFirstSubalbum() )
      type = SCROLL_RIGHT;
    else
      type = SCROLL_UP;
  }
  else
    type = IMMEDIATE;

  //keep advancing collections until we find one with a photo in it
  curPhoto = NULL;
  while(curPhoto == NULL)
  {  
    curCollection = curCollection->getNext();
    collectionNum++;
    if(!curCollection)
    {
      curCollection = curAlbum->getFirstSubalbum();
      collectionNum = 1;
    }
    
    curPhoto = curCollection->getFirst();
  }
  photoNum = 1;
  
  //load and display new photo
  loadPhoto();
  exchangePhotos();
}

void SlideshowWidget::advancePhoto ( ) [private, slot]

Definition at line 610 of file presentationWidget.cpp.

References advanceCollection(), animating, animatingMutex, autoPlayTimer, curPhoto, exchangePhotos(), Photo::getNext(), IMMEDIATE, loadPhoto(), photoNum, SCROLL_LEFT, type, and USE_ANIMATION.

Referenced by contextMenuEvent(), keyPressEvent(), mousePressEvent(), and SlideshowWidget().

{
  //bail if currently animating
  animatingMutex.lock();
  if(animating)
  {
    animatingMutex.unlock();      
    return;
  }
  
  //stop autoPlay timer so next advance only occur after delay after advance is complete
  autoPlayTimer->stop();
   
  animating = true;
  if(USE_ANIMATION)
    type = SCROLL_LEFT;
  else
    type = IMMEDIATE;
  animatingMutex.unlock();      
  
  if(curPhoto->getNext() == NULL) 
  {  advanceCollection(); }
  else
  {
    //load and display new photo
    curPhoto = curPhoto->getNext();
    photoNum++;
    loadPhoto();
    exchangePhotos();
  }
}

void SlideshowWidget::animate ( ) [private, slot]

Definition at line 796 of file presentationWidget.cpp.

References accel, animating, animatingTimer, autoPlay, autoPlayDelay, autoPlayTimer, currentTime, delay, displayDebugMessages, lastStep, lastTime, minDelay, paintBufferCurr, paintBufferPrev, paintOverlaidControls(), refreshScreen(), screenBuffer, screenHeight, screenWidth, SCROLL_DOWN, SCROLL_LEFT, SCROLL_RIGHT, SCROLL_UP, step, and type.

Referenced by exchangePhotos(), and SlideshowWidget().

{
  //---------------------------------
  //determine new number of columns to be shown
    
  //determine # of ms that have passed since last redraw
  currentTime.start();
  double ms = lastTime.msecsTo(currentTime);

  //determine increment
  int inc = (int)(ms/delay);

  //if increment is not zero then update last time
  if(inc != 0)
  {
    lastTime = currentTime;
  }

  //update number of columns shown
  step+=inc;
  
  //boundary conditions
  if( step > screenWidth && (type == SCROLL_LEFT || type == SCROLL_RIGHT) )
    step = screenWidth;
  if( step > screenHeight && (type == SCROLL_UP || type == SCROLL_DOWN) )
    step = screenHeight;
  
  //if step changed then redraw
  if(step != lastStep) 
  {
    if(type == SCROLL_LEFT)
    {
      bitBlt( &screenBuffer, 0, 0, 
              paintBufferPrev, 
              step, 0, 
              paintBufferPrev->width() - step, paintBufferPrev->height(), 
              CopyROP, true );
      bitBlt( &screenBuffer, paintBufferCurr->width() - step, 0, 
              paintBufferCurr, 
              0, 0, step, paintBufferCurr->height(), 
              CopyROP, true );
    }
    else if(type == SCROLL_RIGHT)
    {
      bitBlt( &screenBuffer, step, 0, 
              paintBufferPrev, 
              0, 0, 
              paintBufferPrev->width() - step, paintBufferPrev->height(), 
              CopyROP, true );
      bitBlt( &screenBuffer, 0, 0, 
              paintBufferCurr, 
              paintBufferCurr->width() - step, 0, step, paintBufferCurr->height(), 
              CopyROP, true );
    }
    else if(type == SCROLL_UP)
    {
      bitBlt( &screenBuffer, 0, 0, 
              paintBufferPrev, 
              0, step,  
              paintBufferPrev->width(), paintBufferPrev->height() - step, 
              CopyROP, true );
      bitBlt( &screenBuffer, 0, paintBufferCurr->height() - step,
              paintBufferCurr, 
              0, 0, paintBufferCurr->width(), step,
              CopyROP, true );
    }
    else if(type == SCROLL_DOWN)
    {
      bitBlt( &screenBuffer, 0, step,
              paintBufferPrev, 
              0, 0, 
              paintBufferPrev->width(), paintBufferPrev->height() - step, 
              CopyROP, true );
      bitBlt( &screenBuffer, 0, 0, 
              paintBufferCurr, 
              0, paintBufferCurr->height() - step, paintBufferCurr->width(), step, 
              CopyROP, true );
    }
  
    //paint overlaid controls
    paintOverlaidControls();
    
    //blit to screen
    repaint(false);
     
    lastStep = step;
  
    //not done animating, reiterate
    if( 
        (
          step < screenWidth && 
          (type == SCROLL_LEFT || type == SCROLL_RIGHT) 
        ) ||
        (
          step < screenHeight && 
          (type == SCROLL_UP || type == SCROLL_DOWN) 
        )
      )
    {
      //update speed
      delay = delay * accel;
      if(delay < minDelay) delay = minDelay ;

      //restart timer
      animatingTimer->start( (int)delay, TRUE );
    }
    //done animating....
    else
    {
      animating = false;
      
      //if using debug messages use refreshScreen method which actually displays these.
      //such messages are laid on time and thus not shown when transitioning
      if(displayDebugMessages)
        refreshScreen();  
        
      //if autoplay is enabled restart timer
      if(autoPlay)
        autoPlayTimer->start( (int)1000*autoPlayDelay, TRUE );
    }
  }
  else
  {
    //update speed
    delay = delay * accel;
    if(delay < minDelay) delay = minDelay;

    //restart timer
    animatingTimer->start( (int)delay, TRUE );
  }
  //---------------------------------------
}

void SlideshowWidget::backupCollection ( ) [private, slot]

Definition at line 762 of file presentationWidget.cpp.

References collectionNum, curAlbum, curCollection, curPhoto, exchangePhotos(), Subalbum::getLast(), Album::getLastSubalbum(), Subalbum::getNumPhotos(), Album::getNumSubalbums(), Subalbum::getPrev(), IMMEDIATE, loadPhoto(), photoNum, SCROLL_DOWN, SCROLL_RIGHT, type, and USE_ANIMATION.

Referenced by backupPhoto(), contextMenuEvent(), keyPressEvent(), and mousePressEvent().

{
  if(USE_ANIMATION)
  {
    if(curCollection->getPrev() == NULL &&
       curCollection == curAlbum->getLastSubalbum() )
      type = SCROLL_RIGHT;
    else
      type = SCROLL_DOWN;
  }
  else
    type = IMMEDIATE;
  
  //keep backing up collections until we find one with a photo in it
  curPhoto = NULL;
  while(curPhoto == NULL)
  {
    curCollection = curCollection->getPrev();
    collectionNum--;
    if(!curCollection)
    {
      curCollection = curAlbum->getLastSubalbum();
      collectionNum = curAlbum->getNumSubalbums();
    } 
       
    curPhoto = curCollection->getLast();
  }
  photoNum = curCollection->getNumPhotos();
  
  //load and display new photo
  loadPhoto();
  exchangePhotos();
}

void SlideshowWidget::backupPhoto ( ) [private, slot]

Definition at line 642 of file presentationWidget.cpp.

References animating, animatingMutex, backupCollection(), curPhoto, exchangePhotos(), Photo::getPrev(), IMMEDIATE, loadPhoto(), photoNum, SCROLL_RIGHT, type, and USE_ANIMATION.

Referenced by contextMenuEvent(), keyPressEvent(), and mousePressEvent().

{
  //bail if currently animating
  animatingMutex.lock();
  if(animating)
  {
    animatingMutex.unlock();      
    return;
  }
  
  animating = true;
  if(USE_ANIMATION)
    type = SCROLL_RIGHT;
  else
    type = IMMEDIATE;
  animatingMutex.unlock();      
  
  if(curPhoto->getPrev() == NULL) 
  {  backupCollection(); }
  else
  {
  //load and display new photo
  curPhoto = curPhoto->getPrev();
  photoNum--;   
  loadPhoto();
  exchangePhotos();
}
}

void SlideshowWidget::beginSlideshow	(	Album *	albm,
		Subalbum *	startCollection = `NULL`,
		Photo *	startPhoto = `NULL`
	)

Definition at line 475 of file presentationWidget.cpp.

References autoPlay, autoPlayDelay, autoPlayTimer, BL_TextBorder, Bottom_TextBorder, BR_TextBorder, collectionNum, curAlbum, curCollection, curPhoto, displayAutoPlayDelay, displayDebugMessages, fontSize, Subalbum::getFirst(), Album::getFirstSubalbum(), Subalbum::getNext(), Photo::getNext(), Album::getSaveLocation(), Album::getTheme(), Left_TextBorder, loadPhoto(), mouseShown, photoNum, refreshScreen(), Right_TextBorder, showCoverPage(), THEMES_PATH, TL_TextBorder, Top_TextBorder, and TR_TextBorder.

{
  autoPlay = true;
  autoPlayDelay = 4;
  displayAutoPlayDelay = true;
  displayDebugMessages = false;
  fontSize = 24;
  
  //store album handle and show cover page
  curAlbum = albm;
  
  //determine presentation resources path
  QString presentationResourcesPath;
  QDir tempDir( THEMES_PATH );

  //if theme installed on system using its resources
  if( tempDir.exists( THEMES_PATH + albm->getTheme()) )
  { 
    presentationResourcesPath = THEMES_PATH + albm->getTheme() + "/misc_resources/"; 
  }
  //else try to load resources from the saved album path, this is necessary
  //when viewing albums on machines that do not have the used theme installed
  else 
  { 
    presentationResourcesPath = albm->getSaveLocation() + "/misc_resources/"; 
  }  
    
  //load text border images
  Top_TextBorder.load(presentationResourcesPath + "Top_TextBorder.png" );
  Bottom_TextBorder.load(presentationResourcesPath + "Bottom_TextBorder.png" );
  Left_TextBorder.load(presentationResourcesPath + "Left_TextBorder.png" );
  Right_TextBorder.load(presentationResourcesPath + "Right_TextBorder.png" );
  TL_TextBorder.load(presentationResourcesPath + "TL_TextBorder.png" );
  TR_TextBorder.load(presentationResourcesPath + "TR_TextBorder.png" );
  BL_TextBorder.load(presentationResourcesPath + "BL_TextBorder.png" );
  BR_TextBorder.load(presentationResourcesPath + "BR_TextBorder.png" );
  
  qApp->setOverrideCursor( QCursor(Qt::BlankCursor));
  mouseShown = false;
  setMouseTracking(true);
/*  showCoverPage();*/
  
  //if collection and photo pointers are not null go immediately to specified collection/photo
  if(startCollection != NULL && startPhoto != NULL)
  {
    //set photo and collection  pointers
    curPhoto = startPhoto;
    curCollection = startCollection;
    
    //set photo and collection count #'s
    collectionNum = 1;
    Subalbum* tmpCollection = albm->getFirstSubalbum();
    while(tmpCollection != NULL && tmpCollection != curCollection)
    {
      tmpCollection = tmpCollection->getNext();
      collectionNum++;
    }
    photoNum = 1;
    Photo* tmpPhoto = curCollection->getFirst();
    while(tmpPhoto != NULL && tmpPhoto!= curPhoto)
    {
      tmpPhoto = tmpPhoto->getNext();
      photoNum++;
    }
    
    //load photo and display
    loadPhoto();
    refreshScreen();
    
    //start auto-advance counter
    if(autoPlay)
      autoPlayTimer->start( (int)1000*autoPlayDelay, TRUE );
  }
  //otherwise show album cover page
  else { showCoverPage(); }   
}

void SlideshowWidget::contextMenuEvent ( QContextMenuEvent * e ) [protected]

Definition at line 286 of file presentationWidget.cpp.

References advanceCollection(), advancePhoto(), autoPlay, autoPlayTimer, backupCollection(), backupPhoto(), contextMenuHiding(), contextMenuShown, decreaseTextSize(), IMAGE_PATH, increaseTextSize(), mouseCursorTimer, skipToFirstPhoto(), skipToLastPhoto(), slowDown(), speedUp(), stop(), and toggleAutoPlay().

{
  //disable hiding the mouse cursor until the context menu is destroyed
  mouseCursorTimer->stop();

  //disable autoPlay temporarily while context menu is open, drop shadows look horrid if
  //photo scrolls while menu is up anyways
  autoPlayTimer->stop();
  
  QPopupMenu contextMenu(this);
  contextMenuShown = true;
  connect( &contextMenu, SIGNAL( aboutToHide() ), this, SLOT( contextMenuHiding() ) );
  
  if(autoPlay)  
    contextMenu.insertItem( QIconSet( QPixmap(QString(IMAGE_PATH)+"menuIcons/pause.png") ),
                            tr("Pause"), this, SLOT(toggleAutoPlay()), Key_Return );
  else                            
    contextMenu.insertItem( QIconSet( QPixmap(QString(IMAGE_PATH)+"menuIcons/play.png") ),
                            tr("Play"), this, SLOT(toggleAutoPlay()), Key_Return );
                            
  int speedUpID = contextMenu.insertItem( QIconSet( QPixmap(QString(IMAGE_PATH)+"menuIcons/speedUp.png") ),
                                           tr("Speed Up"), this, SLOT(speedUp()), Key_Plus );
  int slowDownID = contextMenu.insertItem( QIconSet( QPixmap(QString(IMAGE_PATH)+"menuIcons/slowDown.png") ),
                                            tr("Slow Down"), this, SLOT(slowDown()), Key_Minus );
                          
  //if not currently playing disable speeding up/slowing down options                          
  if(!autoPlay)
  {                          
    contextMenu.setItemEnabled( speedUpID, false );
    contextMenu.setItemEnabled( slowDownID, false );
  }
                  
  QPopupMenu navigateMenu(&contextMenu);
  navigateMenu.insertItem( QIconSet( QPixmap(QString(IMAGE_PATH)+"menuIcons/backupPhoto.png") ),
                          tr("Backup Photo"), this, SLOT(backupPhoto()), Key_Left );
  navigateMenu.insertItem( QIconSet( QPixmap(QString(IMAGE_PATH)+"menuIcons/advancePhoto.png") ),
                          tr("Advance Photo"), this, SLOT(advancePhoto()), Key_Right );
  navigateMenu.insertItem( QIconSet( QPixmap(QString(IMAGE_PATH)+"menuIcons/skipToFirstPhoto.png") ),
                          tr("Skip to First Photo"), this, SLOT(skipToFirstPhoto()), Key_Home );
  navigateMenu.insertItem( QIconSet( QPixmap(QString(IMAGE_PATH)+"menuIcons/skipToLastPhoto.png") ),
                          tr("Skip to Last Photo"), this, SLOT(skipToLastPhoto()), Key_End );
  navigateMenu.insertItem( QIconSet( QPixmap(QString(IMAGE_PATH)+"menuIcons/backupCollection.png") ),
                          tr("Backup Collection"), this, SLOT(backupCollection()), Key_Up );
  navigateMenu.insertItem( QIconSet( QPixmap(QString(IMAGE_PATH)+"menuIcons/advanceCollection.png") ),
                          tr("Advance Collection"), this, SLOT(advanceCollection()), Key_Down );
  contextMenu.insertItem( tr("Navigate"), &navigateMenu );
                                      
  contextMenu.insertItem( QIconSet( QPixmap(QString(IMAGE_PATH)+"menuIcons/increaseTextSize.png") ),
                          tr("Increase Text Size"), this, SLOT(increaseTextSize()), CTRL+Key_Plus );
  contextMenu.insertItem( QIconSet( QPixmap(QString(IMAGE_PATH)+"menuIcons/decreaseTextSize.png") ),
                          tr("Decrease Text Size"), this, SLOT(decreaseTextSize()), CTRL+Key_Minus );
  
  contextMenu.insertItem( QIconSet( QPixmap(QString(IMAGE_PATH)+"menuIcons/exit.png") ),
                          tr("Exit"), this, SLOT(stop()), Key_Escape );
                    
  contextMenu.exec( QPoint(e->globalX(), e->globalY()) );
  contextMenuShown = false;
}

void SlideshowWidget::contextMenuHiding ( ) [private, slot]

Definition at line 345 of file presentationWidget.cpp.

References autoPlay, autoPlayDelay, autoPlayTimer, contextMenuHidingBool, HIDE_MOUSE_DELAY, and mouseCursorTimer.

Referenced by contextMenuEvent().

{
  contextMenuHidingBool = true;
  
  //start back up timer for hiding the mouse cursor
  mouseCursorTimer->start( (int)HIDE_MOUSE_DELAY, TRUE );  

  //if autoPlay is enabled start that timer back up too
  if(autoPlay)
    autoPlayTimer->start( (int)1000*autoPlayDelay, TRUE );
}

void SlideshowWidget::decreaseTextSize ( ) [private, slot]

Definition at line 604 of file presentationWidget.cpp.

References fontSize, and refreshScreen().

Referenced by contextMenuEvent(), and keyPressEvent().

{
  fontSize--;
  refreshScreen();
}

void SlideshowWidget::endSlideshow ( ) [signal]

Referenced by stop().

void SlideshowWidget::exchangePhotos ( ) [protected]

Definition at line 929 of file presentationWidget.cpp.

References animate(), animating, delay, IMMEDIATE, initDelay, lastStep, lastTime, paintBufferCurr, paintBufferPrev, refreshScreen(), showPhoto(), step, and type.

Referenced by advanceCollection(), advancePhoto(), backupCollection(), backupPhoto(), skipToFirstPhoto(), and skipToLastPhoto().

{
  //if transition is set to immediate then just show new photo
  if(type == IMMEDIATE)
  {
    refreshScreen();
    animating = false;
    return;
  }
  
  //setup step counter
  lastStep = 0;
  step = 0;

  //set initial delay/speed
  delay = initDelay;

  //exchange buffers
  QPixmap* temp = paintBufferCurr;
  paintBufferCurr = paintBufferPrev;
  paintBufferPrev = temp;
  
  //paint new image to curr buffer
  showPhoto();
  
  //find current time, used to decide how many new columns to reveal in first iteration
  lastTime.start();
  
  //begin animation
  animate();
}

Subalbum * SlideshowWidget::getCurCollection ( )

returns a pointer to the currently visible collection

Definition at line 1067 of file presentationWidget.cpp.

References curCollection.

{ return curCollection; }

Photo * SlideshowWidget::getCurPhoto ( )

returns a pointer to the currently visible photo

Definition at line 1069 of file presentationWidget.cpp.

References curPhoto.

{ return curPhoto; }

void SlideshowWidget::hideMouse ( ) [private, slot]

Definition at line 374 of file presentationWidget.cpp.

References mouseShown, and refreshScreen().

Referenced by SlideshowWidget().

{
  qApp->setOverrideCursor( QCursor(Qt::BlankCursor));
  mouseShown = false;
  refreshScreen();
}

void SlideshowWidget::increaseTextSize ( ) [private, slot]

Definition at line 598 of file presentationWidget.cpp.

References fontSize, and refreshScreen().

Referenced by contextMenuEvent(), and keyPressEvent().

{
  fontSize++;
  refreshScreen();
}

void SlideshowWidget::keyPressEvent ( QKeyEvent * e ) [protected]

Definition at line 140 of file presentationWidget.cpp.

References advanceCollection(), advancePhoto(), backupCollection(), backupPhoto(), contextMenuShown, decreaseTextSize(), displayDebugMessages, increaseTextSize(), refreshScreen(), skipToFirstPhoto(), skipToLastPhoto(), slowDown(), speedUp(), stop(), and toggleAutoPlay().

{
  if(contextMenuShown)
  {
    e->ignore();
    return;
  }
  
  switch( e->key() )
  {
    case Qt::Key_Escape:
      stop();
      break;
    case Qt::Key_Return:
      toggleAutoPlay();
      break;
    case Qt::Key_Plus:
    case Qt::Key_Equal:
      //if control is pressed increase font size
      if(e->state() & Qt::ControlButton )
        increaseTextSize();
      else
        speedUp();
      break;
    case Qt::Key_Minus:
    case Qt::Key_Underscore:
      //if control is pressed decrease font size
      if(e->state() & Qt::ControlButton )
        decreaseTextSize();
      else
        slowDown();
      break;
    case Qt::Key_Left:
      backupPhoto();
      break;
    case Qt::Key_Right:
      advancePhoto();
      break;
    case Qt::Key_Up:
      backupCollection();
      break;
    case Qt::Key_Down:
      advanceCollection();
      break;
    case Qt::Key_Home:
      skipToFirstPhoto();
      break;
    case Qt::Key_End:
      skipToLastPhoto();
      break;
    case Qt::Key_D:
      displayDebugMessages = !displayDebugMessages;
      refreshScreen();
      break;     
    default:
      e->ignore(); 
  }
}

void SlideshowWidget::loadPhoto ( ) [protected]

Definition at line 389 of file presentationWidget.cpp.

References curPhoto, currImage, Photo::getImageFilename(), photoLoaded, prevImage, scaleImage(), screenHeight, and screenWidth.

Referenced by advanceCollection(), advancePhoto(), backupCollection(), backupPhoto(), beginSlideshow(), showCollectionPage(), skipToFirstPhoto(), and skipToLastPhoto().

{
  //exchange prev and curr pointers
  QImage* tmp = prevImage;
  prevImage = currImage;
  currImage = tmp;

  //scale full size image to fit screen
  scaleImage( curPhoto->getImageFilename(),*currImage, 
              screenWidth, screenHeight );
  photoLoaded = true;                  
}

void SlideshowWidget::mouseMoveEvent ( QMouseEvent * e ) [protected]

Definition at line 264 of file presentationWidget.cpp.

References HIDE_MOUSE_DELAY, mouseCursorTimer, mouseShown, paintOverlaidControls(), and photoLoaded.

{
  //mouse move events often are triggered when we are exiting
  //don't restart hiding mouse in these scenarios
  if(!photoLoaded)
    return;
  
  mouseCursorTimer->stop();
  
  //restore the mouse cursor
  //hide again if inactive for three seconds
  //if mouse not already shown repaint
  if(!mouseShown)
  {
    qApp->restoreOverrideCursor();
    mouseShown = true;
    paintOverlaidControls();
  }
  
  mouseCursorTimer->start( (int)HIDE_MOUSE_DELAY, TRUE );  
}

void SlideshowWidget::mousePressEvent ( QMouseEvent * e ) [protected]

Definition at line 199 of file presentationWidget.cpp.

References advanceCollection(), advancePhoto(), backupCollection(), backupPhoto(), HIDE_MOUSE_DELAY, interfaceAlphaMask, mouseCursorTimer, mouseShown, pauseInterface, screenHeight, screenWidth, TEXT_MARGIN, and toggleAutoPlay().

{
  //if not the left mouse button ignore
  if(e->button() != Qt::LeftButton)
    return;
  
  //if mouse is shown so is the control interface, check to see if
  //user clicked one of the interface buttons, if not
  //not advance to next photo as normal
  if( mouseShown )
  {
    bool buttonClicked = false;
    int x, y, w, h;
    w = pauseInterface.width();
    h = pauseInterface.height();
    x = ( screenWidth - w ) / 2;
    y = screenHeight - h - TEXT_MARGIN;
        
    //check if button pressed, must be within interface 
    //region and a non-transparent pixel
    if(e->pos().x() >= x && e->pos().y() >= y &&
       e->pos().x() <= x+w && e->pos().y() <= y+h &&
       interfaceAlphaMask.pixel(e->pos().x() - x, e->pos().y() - y) != 0)
    {        
      buttonClicked = true;
      
      //restart the countdown for hiding the mouse and interface
      mouseCursorTimer->stop();
      mouseCursorTimer->start( (int)HIDE_MOUSE_DELAY, TRUE );  
      
      int xMid = x + (w/2);
      int yMid = y + (h/2);
      int dx = e->pos().x() - xMid;
      int dy = e->pos().y() - yMid;
      int distSqrd = dx*dx + dy*dy;
      //center play/pause button is 55 pixels in radius
      if(distSqrd <= 3025)
        toggleAutoPlay();
      //else one of the other buttons has been pressed
      else
      {
        if(e->pos().x() < xMid)
        {
          //top left is prev photo button
          if(e->pos().y() < yMid)
            backupPhoto();
          //bottom left is prev collection button
          else
            backupCollection();
        }
        else
        {
          //top right is next photo button
          if(e->pos().y() < yMid)
            advancePhoto();
          //bottom right is next collection button
          else
           advanceCollection();
        }
      }
    }
    
  }
}

void SlideshowWidget::paintEvent ( QPaintEvent * ) [protected]

Definition at line 381 of file presentationWidget.cpp.

References screenBuffer.

{ 
  //blit the screen buffer to the screen
  bitBlt( this, 0, 0, &screenBuffer, 
          0, 0, screenBuffer.width(), screenBuffer.height(), 
          CopyROP, true );
}

void SlideshowWidget::paintOverlaidControls ( ) [protected]

Definition at line 976 of file presentationWidget.cpp.

References autoPlay, autoPlayDelay, collectionNum, curAlbum, curCollection, displayAutoPlayDelay, displayDebugMessages, fontSize, Subalbum::getNumPhotos(), Album::getNumSubalbums(), mouseShown, pauseInterface, photoNum, playInterface, screenBuffer, screenHeight, screenWidth, speed1, speed2, speed4, speed8, and TEXT_MARGIN.

Referenced by animate(), mouseMoveEvent(), and refreshScreen().

{
  QString tempString = "";
  int x, y;
  
  //setup painter to screen buffer for laying on top all top level widgets
  QPainter p;
  p.begin( &screenBuffer );
  //------------------------------
  //setup font stuff for writing text
  QFont f( "times", fontSize, QFont::Bold );
  QFontMetrics fm( f );
  p.setFont( f );
  //------------------------------
  //paint autoPlay delay
  if(autoPlay && displayAutoPlayDelay)
  {
    //get handle on right speed icon
    QImage* speedIcon;
    if(autoPlayDelay == 1) speedIcon = &speed1;
    else if(autoPlayDelay == 2) speedIcon = &speed2;
    else if(autoPlayDelay == 4) speedIcon = &speed4;
    else speedIcon = &speed8;
    
    int maxWidth = speed1.width();
    if(speed2.width() > maxWidth) maxWidth = speed2.width();
    if(speed4.width() > maxWidth) maxWidth = speed4.width();
    if(speed8.width() > maxWidth) maxWidth = speed8.width();
    
    int maxHeight = speed1.height();
    if(speed2.height() > maxHeight) maxHeight = speed2.height();
    if(speed4.height() > maxHeight) maxHeight = speed4.height();
    if(speed8.height() > maxHeight) maxHeight = speed8.height();
    
    x = screenWidth - TEXT_MARGIN - speedIcon->width() - (maxWidth - speedIcon->width())/2;
    y = screenHeight - TEXT_MARGIN - speedIcon->height() - (maxHeight - speedIcon->height())/2;
    
    p.drawImage( x, y, *speedIcon );
    displayAutoPlayDelay = false;
  }
  //------------------------------
  //if debugging enabled paint such messages
  if(displayDebugMessages)
  {
    //before debugging message set color to green
    p.setPen(QColor("green"));
    //------------------------------
    //paint collection number
    tempString = QString("(Collection %1 / %2)").arg(collectionNum).arg(curAlbum->getNumSubalbums());
    x = 0;
    y = 0;
    p.fillRect( x, y, fm.width(tempString), fm.height(), QBrush(QColor("black")) );
    p.drawText( x, y + fm.ascent(), tempString );
    //------------------------------
    //paint photo number
    tempString = QString("(Photo %1 / %2)").arg(photoNum).arg(curCollection->getNumPhotos());
    x = screenWidth - fm.width(tempString);
    y = 0;
    p.fillRect( x, y, fm.width(tempString), fm.height(), QBrush(QColor("black")) );
    p.drawText(x, y + fm.ascent(), tempString );
  }
  //------------------------------
  //if the mouse is shown paint the control interface
  if(mouseShown)
  {
    QImage* shownInterface;
    if(autoPlay)
      shownInterface = &pauseInterface;
    else
      shownInterface = &playInterface;

    x = ( screenWidth - shownInterface->width() ) / 2;
    y = screenHeight - shownInterface->height() - TEXT_MARGIN;
    p.drawImage( x, y, *shownInterface );

    //paint collection # and photo #
    f.setPointSize( 14 );      
    fm = QFontMetrics( f );
    tempString = QString("%1 / %2").arg(photoNum).arg(curCollection->getNumPhotos());
    x = x + (shownInterface->width() / 2) - (fm.width(tempString) / 2);
    y = y + 104;
    p.setFont( f );
    p.setPen(QColor("white"));
    p.drawText( x, y, tempString );
  }
  //------------------------------
  //ender painter and flast to screen
  p.end();
  repaint(false);
}

void SlideshowWidget::refreshScreen ( ) [protected]

Definition at line 961 of file presentationWidget.cpp.

References paintBufferCurr, paintOverlaidControls(), screenBuffer, and showPhoto().

Referenced by animate(), beginSlideshow(), decreaseTextSize(), exchangePhotos(), hideMouse(), increaseTextSize(), keyPressEvent(), showCollectionPage(), slowDown(), speedUp(), and toggleAutoPlay().

{
  //paint current photo to paintBufferCurr
  showPhoto();
  
  //blit to screen buffer    
  bitBlt( &screenBuffer, 0, 0, 
          paintBufferCurr, 
          0, 0, paintBufferCurr->width(), paintBufferCurr->height(), 
          CopyROP, true );
          
  //paint overlaid controls
  paintOverlaidControls();
}

void SlideshowWidget::showCollectionPage ( Subalbum * subalbum ) [protected]

Definition at line 559 of file presentationWidget.cpp.

References autoPlay, autoPlayDelay, autoPlayTimer, curCollection, curPhoto, Subalbum::getFirst(), loadPhoto(), photoNum, and refreshScreen().

Referenced by showCoverPage().

{
  //set subalbum pointer
  curCollection = subalbum;
  
  //for now load up first photo
  curPhoto = curCollection->getFirst();
  photoNum = 1;  
  
  loadPhoto();
  refreshScreen();
  if(autoPlay)
    autoPlayTimer->start( (int)1000*autoPlayDelay, TRUE );
}

void SlideshowWidget::showCoverPage ( ) [protected]

Definition at line 552 of file presentationWidget.cpp.

References collectionNum, curAlbum, Album::getFirstSubalbum(), and showCollectionPage().

Referenced by beginSlideshow().

{
  //for now just bring up first collection
  collectionNum = 1;
  showCollectionPage(curAlbum->getFirstSubalbum() );
}

void SlideshowWidget::showPhoto ( ) [protected]

Definition at line 402 of file presentationWidget.cpp.

References BL_TextBorder, Bottom_TextBorder, BR_TextBorder, curPhoto, currImage, fontSize, Photo::getDescription(), Left_TextBorder, paintBufferCurr, Right_TextBorder, screenHeight, TEXT_MARGIN, TL_TextBorder, Top_TextBorder, and TR_TextBorder.

Referenced by exchangePhotos(), and refreshScreen().

{ 
  QString tempString = "";
  int x, y;
  
  paintBufferCurr->fill(black);
  QPainter p;
  //------------------------------
  //paint photo
  p.begin( paintBufferCurr );
  p.drawImage( (paintBufferCurr->width() - currImage->width() ) / 2,
               (paintBufferCurr->height() - currImage->height() ) / 2,
               *currImage );
  //------------------------------
  //setup font stuff for writing text
  p.setPen(QColor("black"));
  QFont f( "times", fontSize, QFont::Bold );
  QFontMetrics fm( f );
  p.setFont( f );
  //------------------------------
  //paint description               
  tempString = curPhoto->getDescription();
  if(tempString.stripWhiteSpace().length() > 0)
  {
    x = TEXT_MARGIN;
    y = screenHeight - TEXT_MARGIN - fm.height() - 2*TL_TextBorder.height();
    //-------
    //top left corner
    p.drawImage( x, y, TL_TextBorder );
  
    //top edge                 
    p.drawImage( QRect( x + TL_TextBorder.width(), y, 
                        fm.width(tempString), TL_TextBorder.height() ), 
                 Top_TextBorder );
  
    //top right corner               
    p.drawImage( x + TL_TextBorder.width() + fm.width(tempString), 
                 y, TR_TextBorder );
    //-------
    //left edge                 
    p.drawImage( QRect( x, 
                        y + TL_TextBorder.height(), 
                        TL_TextBorder.width(), fm.height() ), 
                 Left_TextBorder );
  
    //right edge                 
    p.drawImage( QRect( x + TL_TextBorder.width() + fm.width(tempString), 
                        y + TL_TextBorder.height(), 
                        TL_TextBorder.width(), fm.height() ), 
                 Right_TextBorder );
    //-------
    //bottom left corner
    p.drawImage( x, 
                 y + TL_TextBorder.height() + fm.height(), BL_TextBorder );
    
    //bottom edge                 
    p.drawImage( QRect( x + TL_TextBorder.width(), 
                        y + TL_TextBorder.height() + fm.height(),
                        fm.width(tempString), TL_TextBorder.height() ), 
                 Bottom_TextBorder );
  
    //bottom right corner
    p.drawImage( x + TL_TextBorder.width() + fm.width(tempString), 
                 y + TL_TextBorder.height() + fm.height(), BR_TextBorder );
    //-------
    p.fillRect( x + TL_TextBorder.width(), y + TL_TextBorder.height(), 
                fm.width(tempString), fm.height(), QBrush(QColor("white")) );
    p.drawText( x + TL_TextBorder.width(), y + TL_TextBorder.height() + fm.ascent(), tempString );
  }
  //------------------------------
  p.end();                 
}

void SlideshowWidget::skipToFirstPhoto ( ) [private, slot]

Definition at line 671 of file presentationWidget.cpp.

References animating, animatingMutex, curCollection, curPhoto, exchangePhotos(), Subalbum::getFirst(), IMMEDIATE, loadPhoto(), photoNum, SCROLL_RIGHT, type, and USE_ANIMATION.

Referenced by contextMenuEvent(), and keyPressEvent().

{
  //bail if already at first photo in collection
  if(curPhoto == curCollection->getFirst())
    return;
  
  //bail if currently animating
  animatingMutex.lock();
  if(animating)
  {
    animatingMutex.unlock();      
    return;
  }
  
  animating = true;
  if(USE_ANIMATION)
    type = SCROLL_RIGHT;
  else
    type = IMMEDIATE;
  animatingMutex.unlock();      
  
  curPhoto = curCollection->getFirst();
  photoNum = 1;    
  //load and display new photo
  loadPhoto();
  exchangePhotos();
}

void SlideshowWidget::skipToLastPhoto ( ) [private, slot]

Definition at line 699 of file presentationWidget.cpp.

References animating, animatingMutex, curCollection, curPhoto, exchangePhotos(), Subalbum::getLast(), Subalbum::getNumPhotos(), IMMEDIATE, loadPhoto(), photoNum, SCROLL_LEFT, type, and USE_ANIMATION.

Referenced by contextMenuEvent(), and keyPressEvent().

{
  //bail if already at last photo in collection
  if(curPhoto == curCollection->getLast())
    return;
  
  //bail if currently animating
  animatingMutex.lock();
  if(animating)
  {
    animatingMutex.unlock();      
    return;
  }
  
  animating = true;
  if(USE_ANIMATION)
    type = SCROLL_LEFT;
  else
    type = IMMEDIATE;
  animatingMutex.unlock();      
  
  curPhoto = curCollection->getLast();
  photoNum = curCollection->getNumPhotos();  
  
  //load and display new photo
  loadPhoto();
  exchangePhotos();
}

void SlideshowWidget::slowDown ( ) [private, slot]

Definition at line 586 of file presentationWidget.cpp.

References autoPlay, autoPlayDelay, autoPlayTimer, displayAutoPlayDelay, and refreshScreen().

Referenced by contextMenuEvent(), and keyPressEvent().

{
  if(autoPlay && autoPlayDelay < 8)
  {
    autoPlayTimer->stop();
    autoPlayDelay = autoPlayDelay * 2;
    displayAutoPlayDelay = true;
    refreshScreen();
    autoPlayTimer->start( (int)1000*autoPlayDelay, TRUE );
  }
}

void SlideshowWidget::speedUp ( ) [private, slot]

Definition at line 574 of file presentationWidget.cpp.

References autoPlay, autoPlayDelay, autoPlayTimer, displayAutoPlayDelay, and refreshScreen().

Referenced by contextMenuEvent(), and keyPressEvent().

{
  if(autoPlay && autoPlayDelay > 1)
  {
    autoPlayTimer->stop();
    autoPlayDelay = autoPlayDelay / 2;
    displayAutoPlayDelay = true;
    refreshScreen();
    autoPlayTimer->start( (int)1000*autoPlayDelay, TRUE );
  }
}

void SlideshowWidget::stop ( ) [private, slot]

Definition at line 116 of file presentationWidget.cpp.

References animatingTimer, autoPlayTimer, endSlideshow(), mouseCursorTimer, mouseShown, and photoLoaded.

Referenced by contextMenuEvent(), and keyPressEvent().

{
  //stop auto-advance, animation, and hiding mouse cursor timers
  autoPlayTimer->stop();
  animatingTimer->stop();
  mouseCursorTimer->stop();
  
  //set the photo loaded bool to false to
  //force loading the first photo the next time
  //we start a presentation
  photoLoaded = false;
  
  //restore the mouse cursor if it was hidden
  if(!mouseShown)
  {
    qApp->restoreOverrideCursor();
    mouseShown = true;
  }
  
  //emit exiting signal indicating to hide 
  //this widget and show normal widgets again
  emit endSlideshow();
}

void SlideshowWidget::toggleAutoPlay ( ) [private, slot]

Definition at line 357 of file presentationWidget.cpp.

References autoPlay, autoPlayDelay, autoPlayTimer, displayAutoPlayDelay, and refreshScreen().

Referenced by contextMenuEvent(), keyPressEvent(), and mousePressEvent().

{
  if(autoPlay)
  {
    autoPlayTimer->stop();
    autoPlay = false;
    refreshScreen(); 
  }
  else
  {
    displayAutoPlayDelay = true;
    autoPlay = true;      
    refreshScreen();
    autoPlayTimer->start( (int)1000*autoPlayDelay, TRUE );
  }
}