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PhotoEditWidget Class Reference

#include <photoEditWidget.h>

List of all members.

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Detailed Description

Interface for editor photos. Operations may include redeye reduction, cropping, exposure adjustment, etc.

Definition at line 40 of file photoEditWidget.h.

Public Member Functions
	PhotoEditWidget (QWidget *parent=0, const char *name=0)
	Creates layout.
	~PhotoEditWidget ()
	Deletes objects.
void	setPhoto (Photo *photo)
	Sets the photo pointer.
Private Slots
void	updateDescription (const QString &val)
	Updates photo description.
void	adjustExposure ()
	Adjusts Exposure of entire image.
void	cropToRegion ()
	Cropped image to selected region.
void	invertSelection ()
	Inverts image.
void	reduceRedeye ()
	Applies redeye reduction to selected region.
void	resetImageAction ()
	Resets photo to state before editing took place.
void	returnFromEdit ()
	Returns to organizing mode.
Private Attributes
QGridLayout *	grid
	Grid widgets are placed in.
QFrame *	buttons
	Grid lower buttons are placed in.
QGridLayout *	grid2
	Grid for lower buttons.
QLabel *	photoDescription
	Label "Photo Description:".
QLineEdit *	photoDescriptionVal
	Actual photo description.
Photo *	photo
	Pointer to backend photo.
QImage *	originalImage
	Backup of image before any manipulations were preformed, allows user to reset image.
PhotoViewWidget *	photoView
	Photo view, provides interface to see image and select regions of it.
QPixmap *	adjExposureImage
	"Adj. Exposure" image
QPushButton *	adjExposureButton
	"Adj. Exposure" button
QPixmap *	cropImage
	"Crop" image
QPushButton *	cropButton
	"Crop" button
QPixmap *	invertImage
	"Invert" image
QPushButton *	invertButton
	"Invert" button
QPixmap *	redEyeImage
	"Red Eye" image
QPushButton *	redEyeButton
	"Red Eye" button
QPixmap *	resetImage
	"Reset" image
QPushButton *	resetButton
	"Reset" button
QPixmap *	returnImage
	"Return" image
QPushButton *	returnButton
	"Return" button
LayoutWidget *	layout
	Pointer to the parent layout widget.

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Constructor & Destructor Documentation

PhotoEditWidget::PhotoEditWidget (  QWidget *  parent = 0, const char *  name = 0 )

Creates layout. Definition at line 41 of file photoEditWidget.cpp. References adjExposureButton, adjExposureImage, adjustExposure(), buttons, cropButton, cropImage, cropToRegion(), grid, grid2, IMAGE_PATH, invertButton, invertImage, invertSelection(), layout, originalImage, photo, photoDescription, photoDescriptionVal, photoView, redEyeButton, redEyeImage, reduceRedeye(), resetButton, resetImage, resetImageAction(), returnButton, returnFromEdit(), returnImage, and updateDescription(). : QWidget(parent,name) { //set photo pointer to null by default photo = NULL; //backup image null by default originalImage = NULL; //store layout pointer layout = (LayoutWidget*)parent; //create photo description labels photoDescription = new QLabel( this ); photoDescription->setText( "Photo Description:" ); photoDescription->setFont( QFont( "Times", 12, QFont::Bold ) ); photoDescriptionVal = new QLineEdit( this ); photoDescriptionVal->setFont( QFont( "Times", 12, QFont::Bold ) ); connect( photoDescriptionVal, SIGNAL(textChanged(const QString&)), SLOT(updateDescription(const QString&)) ); //create photo label photoView = new PhotoViewWidget( this, "photo view" ); //create buttons buttons = new QFrame(this); adjExposureImage = new QPixmap( QString(IMAGE_PATH)+"adjExposure.png" ); adjExposureButton = new QPushButton( buttons ); adjExposureButton->setPixmap( *adjExposureImage ); adjExposureButton->setEnabled(false); connect( adjExposureButton, SIGNAL(clicked()), SLOT(adjustExposure()) ); cropImage = new QPixmap( QString(IMAGE_PATH)+"crop.png" ); cropButton = new QPushButton( buttons ); cropButton->setPixmap( *cropImage ); connect( cropButton, SIGNAL(clicked()), SLOT(cropToRegion()) ); invertImage = new QPixmap( QString(IMAGE_PATH)+"invert.png" ); invertButton = new QPushButton( buttons ); invertButton->setPixmap( *invertImage ); connect( invertButton, SIGNAL(clicked()), SLOT(invertSelection()) ); redEyeImage = new QPixmap( QString(IMAGE_PATH)+"removeRedEye.png" ); redEyeButton = new QPushButton( buttons ); redEyeButton->setPixmap( *redEyeImage ); redEyeButton->setEnabled(false); connect( redEyeButton, SIGNAL(clicked()), SLOT(reduceRedeye()) ); resetImage = new QPixmap( QString(IMAGE_PATH)+"reset.png" ); resetButton = new QPushButton( buttons ); resetButton->setPixmap( *resetImage ); connect( resetButton, SIGNAL(clicked()), SLOT(resetImageAction()) ); returnImage = new QPixmap( QString(IMAGE_PATH)+"return.png" ); returnButton = new QPushButton( buttons ); returnButton->setPixmap( *returnImage ); connect( returnButton, SIGNAL(clicked()), SLOT(returnFromEdit()) ); //place all items in grid layout grid = new QGridLayout( this, 3, 3, 0 ); grid->addWidget( photoDescription, 0, 0, Qt::AlignLeft ); grid->addWidget( photoDescriptionVal, 0, 1 ); grid->addMultiCellWidget( photoView, 1, 1, 0, 2, Qt::AlignCenter ); grid2 = new QGridLayout( buttons, 1, 8, 0 ); grid2->addWidget( adjExposureButton, 0, 1, Qt::AlignLeft ); grid2->addWidget( cropButton, 0, 2, Qt::AlignLeft ); grid2->addWidget( invertButton, 0, 3, Qt::AlignLeft ); grid2->addWidget( redEyeButton, 0, 4, Qt::AlignLeft ); grid2->addWidget( resetButton, 0, 5, Qt::AlignLeft ); grid2->addWidget( returnButton, 0, 6, Qt::AlignLeft ); //set first and last column of button grid to take up remaining space grid2->setColStretch( 0, 1 ); grid2->setColStretch( 7, 1 ); grid->addMultiCellWidget( buttons, 2, 2, 0, 2 ); //set the last column to stretch to fill any blank space grid->setColStretch( 2, 1 ); //set photo row to stretch to fill any blank space grid->setRowStretch( 1, 1 ); //Set the second column, the actual photo description //to have a minimum width grid->addColSpacing(1, 300 ); //set the background of the widget to be white setPaletteBackgroundColor( QColor(255, 255, 255) ); }

PhotoEditWidget::~PhotoEditWidget (   )

Deletes objects. Definition at line 134 of file photoEditWidget.cpp. References originalImage. { delete originalImage; originalImage = NULL; }

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Member Function Documentation

void PhotoEditWidget::adjustExposure (   )  [private, slot]

Adjusts Exposure of entire image. Set new image pointer and create all image forms Reload photo view If this is first manipulation to image then backup original, otherwise delete intermediate object Definition at line 178 of file photoEditWidget.cpp. References Photo::getImageFilename(), originalImage, photo, photoView, Photo::setImage(), and PhotoViewWidget::setPhoto(). Referenced by PhotoEditWidget(). { //--------------------------------- //load the full image QImage *backendImage = new QImage( photo->getImageFilename() ); //--------------------------------------------- //find mean and max log of luminance double delta = 0.00001; double max = 0.0; double sum = 0.0; double tmp, tmp2; int x; for(x=0; x<backendImage->width(); x++) { int y; for(y=0; y<backendImage->height(); y++) { QRgb val = backendImage->pixel( x, y ); tmp = qGray(val); tmp = tmp / 255.0; tmp2 = log( tmp + delta ); sum+=tmp2; if(tmp > max) max = tmp; } } double avg = exp(sum/(backendImage->width() * backendImage->height())); cout << "max: " << max << endl; cout << "avg: " << avg << endl; double whiteSquared = max*max; //--------------------------------------------- //create new image and fill in adjusted values QImage* equalizedImage = new QImage(backendImage->width(), backendImage->height(), backendImage->depth()); double r, g, b; double alpha = 0.18; for(x=0; x<backendImage->width(); x++) { int y; for(y=0; y<backendImage->height(); y++) { QRgb val = backendImage->pixel( x, y ); r = qRed(val); g = qGreen(val); b = qBlue(val); r = r/255.0; g = g/255.0; b = b/255.0; r = (alpha/avg) * r; g = (alpha/avg) * g; b = (alpha/avg) * b; r = (r * (1 + (r / whiteSquared))) / (1 + r); g = (g * (1 + (g / whiteSquared))) / (1 + g); b = (b * (1 + (b / whiteSquared))) / (1 + b); r = r*255; g = g*255; b = b*255; val = qRgb( (int)r, (int)g, (int)b ); equalizedImage->setPixel( x, y, val ); } } //--------------------------------- if(originalImage == NULL) { originalImage = backendImage; } else { delete backendImage; backendImage = NULL; } //--------------------------------- photo->setImage(equalizedImage); //set image function deletes object once done so remove pointer to memory //we don't own any more equalizedImage = NULL; //--------------------------------- photoView->setPhoto( photo ); //--------------------------------- }

void PhotoEditWidget::cropToRegion (   )  [private, slot]

Cropped image to selected region. Set new image pointer and create all image forms Reload photo view If this is first manipulation to image then backup original, otherwise delete intermediate object Definition at line 264 of file photoEditWidget.cpp. References Photo::actualSlideshowHeight(), Photo::actualSlideshowWidth(), Photo::getImageFilename(), PhotoViewWidget::getSelection(), originalImage, photo, photoView, Photo::setImage(), and PhotoViewWidget::setPhoto(). Referenced by PhotoEditWidget(). { //--------------------------------- //first get selected coordinates QPoint topLeft, bottomRight; photoView->getSelection(topLeft, bottomRight); //if selection has no width or height then bail immediately if(bottomRight.x() - topLeft.x() == 0 || bottomRight.y() - topLeft.y() == 0) { //scold user for not selection part of the image return; } //--------------------------------- //load the full image QImage *backendImage = new QImage( photo->getImageFilename() ); //--------------------------------- //scale the selected coordinates up into actual full size coordinates float widthRatio = (1.0f * backendImage->width()) / photo->actualSlideshowWidth(); float heightRatio = (1.0f * backendImage->height()) / photo->actualSlideshowHeight(); //if user selected to end of photo fix selection to end rather //then scale and get numerical error which prevents selection //from running to edge ot photo if(bottomRight.x() == (photo->actualSlideshowWidth() - 1)) bottomRight.setX( backendImage->width() - 1 ); else bottomRight.setX( bottomRight.x() * widthRatio ); if(bottomRight.y() == (photo->actualSlideshowHeight() - 1)) bottomRight.setY( backendImage->height() - 1 ); else bottomRight.setY( bottomRight.y() * heightRatio ); //--------------------------------- //create new fullsize image QImage* croppedImage = new QImage(bottomRight.x() - topLeft.x() + 1, bottomRight.y() - topLeft.y() + 1, backendImage->depth()); int newX, newY; newX = 0; int x; for(x=topLeft.x(); x<= bottomRight.x(); x++) { newY = 0; int y; for(y=topLeft.y(); y<= bottomRight.y(); y++) { croppedImage->setPixel( newX, newY, backendImage->pixel(x, y) ); newY++; } newX++; } //--------------------------------- if(originalImage == NULL) { originalImage = backendImage; } else { delete backendImage; backendImage = NULL; } //--------------------------------- photo->setImage(croppedImage); //set image function deletes object once done so remove pointer to memory //we don't own any more croppedImage = NULL; //--------------------------------- photoView->setPhoto( photo ); //--------------------------------- }

void PhotoEditWidget::invertSelection (   )  [private, slot]

Inverts image. Set new image pointer and create all image forms Reload photo view If this is first manipulation to image then backup original, otherwise delete intermediate object Definition at line 344 of file photoEditWidget.cpp. References Photo::actualSlideshowHeight(), Photo::actualSlideshowWidth(), Photo::getImageFilename(), PhotoViewWidget::getSelection(), originalImage, photo, photoView, Photo::setImage(), and PhotoViewWidget::setPhoto(). Referenced by PhotoEditWidget(). { //--------------------------------- //first get selected coordinates QPoint topLeft, bottomRight; photoView->getSelection(topLeft, bottomRight); //--------------------------------- //load the full image QImage *backendImage = new QImage( photo->getImageFilename() ); //--------------------------------- //if selected region is empty then invert entire image if(bottomRight.x() - topLeft.x() == 0 || bottomRight.y() - topLeft.y() == 0) { topLeft.setX(0); topLeft.setY(0); bottomRight.setX(backendImage->width() - 1); bottomRight.setY(backendImage->height() - 1); } //else scale the selected coordinates up into actual full size coordinates else { float widthRatio = (1.0f * backendImage->width()) / photo->actualSlideshowWidth(); float heightRatio = (1.0f * backendImage->height()) / photo->actualSlideshowHeight(); topLeft.setX( topLeft.x() * widthRatio ); topLeft.setY( topLeft.y() * heightRatio ); //if user selected to end of photo fix selection to end rather //then scale and get numerical error which prevents selection //from running to edge ot photo if(bottomRight.x() == (photo->actualSlideshowWidth() - 1)) bottomRight.setX( backendImage->width() - 1 ); else bottomRight.setX( bottomRight.x() * widthRatio ); if(bottomRight.y() == (photo->actualSlideshowHeight() - 1)) bottomRight.setY( backendImage->height() - 1 ); else bottomRight.setY( bottomRight.y() * heightRatio ); } //--------------------------------- //invert image QImage* invertedImage = new QImage(backendImage->width(), backendImage->height(), backendImage->depth()); int x; for(x=0; x<backendImage->width(); x++) { int y; for(y=0; y<backendImage->height(); y++) { //if within selected region invert color if( x >= topLeft.x() && x <= bottomRight.x() && y >= topLeft.y() && y <= bottomRight.y()) { QRgb val = backendImage->pixel( x, y ); val = qRgb( 255 - qRed(val), 255 - qGreen(val), 255 - qBlue(val) ); invertedImage->setPixel( x, y, val ); } //otherwise copy color else { invertedImage->setPixel( x, y, backendImage->pixel(x, y) ); } } } //--------------------------------- if(originalImage == NULL) { originalImage = backendImage; } else { delete backendImage; backendImage = NULL; } //--------------------------------- photo->setImage(invertedImage); //set image function deletes object once done so remove pointer to memory //we don't own any more invertedImage = NULL; //--------------------------------- photoView->setPhoto( photo ); //--------------------------------- }

void PhotoEditWidget::reduceRedeye (   )  [private, slot]

Applies redeye reduction to selected region. Definition at line 436 of file photoEditWidget.cpp. Referenced by PhotoEditWidget(). { }

void PhotoEditWidget::resetImageAction (   )  [private, slot]

Resets photo to state before editing took place. Set new image pointer and create all image forms Reload photo view Definition at line 441 of file photoEditWidget.cpp. References originalImage, photo, photoView, Photo::setImage(), and PhotoViewWidget::setPhoto(). Referenced by PhotoEditWidget(), and returnFromEdit(). { //if previous state saved revert all changes if(originalImage != NULL) { photo->setImage(originalImage); //set image function deletes object once done so remove pointer to memory //we don't own any more originalImage = NULL; photoView->setPhoto( photo ); } }

void PhotoEditWidget::returnFromEdit (   )  [private, slot]

Returns to organizing mode. Definition at line 458 of file photoEditWidget.cpp. References layout, originalImage, resetImageAction(), and LayoutWidget::stopEdit(). Referenced by PhotoEditWidget(). { //no changes? then just exit if(originalImage == NULL) { layout->stopEdit(true); return; } //otherwise ask user if they are sure they want to permantly scare their photo :) QuestionDialog sure( "Keep changes?", "Once applied alterations cannot be undone.", "warning.png", this ); //apply changes and exit if(sure.exec()) { layout->stopEdit(true); } //revert before exiting else { resetImageAction(); layout->stopEdit(true); } }

void PhotoEditWidget::setPhoto (  Photo *  photo  )

Sets the photo pointer. Definition at line 140 of file photoEditWidget.cpp. References originalImage, photoDescriptionVal, photoView, resizeImage(), PhotoViewWidget::setPhoto(), SLIDESHOW_HEIGHT, and SLIDESHOW_WIDTH. Referenced by LayoutWidget::editPhoto(). { //store photo object handle this->photo = photo; //delete old original photo delete originalImage; originalImage = NULL; //set description photoDescriptionVal->setText( photo->getDescription() ); //update view of photo photoView->setPhoto(photo); //check to see if slideshow dimensions are known, //if not load image now and compute size, set //dimensions in photo object for future use if(photo->actualSlideshowWidth() == -1) { QImage *backendImage = new QImage( photo->getImageFilename() ); int w, h; resizeImage( backendImage->width(), backendImage->height(), SLIDESHOW_WIDTH, SLIDESHOW_HEIGHT, w, h); photo->setActualSlideshowDimensions( w, h); delete backendImage; backendImage = NULL; } }

void PhotoEditWidget::updateDescription (  const QString &  val  )  [private, slot]

Updates photo description. Definition at line 172 of file photoEditWidget.cpp. References photo, and Photo::setDescription(). Referenced by PhotoEditWidget(). { if(photo != NULL) photo->setDescription(val); }

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Member Data Documentation

QPushButton* PhotoEditWidget::adjExposureButton [private]

"Adj. Exposure" button Definition at line 107 of file photoEditWidget.h. Referenced by PhotoEditWidget().

QPixmap* PhotoEditWidget::adjExposureImage [private]

"Adj. Exposure" image Definition at line 104 of file photoEditWidget.h. Referenced by PhotoEditWidget().

QFrame* PhotoEditWidget::buttons [private]

Grid lower buttons are placed in. Definition at line 82 of file photoEditWidget.h. Referenced by PhotoEditWidget().

QPushButton* PhotoEditWidget::cropButton [private]

"Crop" button Definition at line 113 of file photoEditWidget.h. Referenced by PhotoEditWidget().

QPixmap* PhotoEditWidget::cropImage [private]

"Crop" image Definition at line 110 of file photoEditWidget.h. Referenced by PhotoEditWidget().

QGridLayout* PhotoEditWidget::grid [private]

Grid widgets are placed in. Definition at line 79 of file photoEditWidget.h. Referenced by PhotoEditWidget().

QGridLayout* PhotoEditWidget::grid2 [private]

Grid for lower buttons. Definition at line 85 of file photoEditWidget.h. Referenced by PhotoEditWidget().

QPushButton* PhotoEditWidget::invertButton [private]

"Invert" button Definition at line 119 of file photoEditWidget.h. Referenced by PhotoEditWidget().

QPixmap* PhotoEditWidget::invertImage [private]

"Invert" image Definition at line 116 of file photoEditWidget.h. Referenced by PhotoEditWidget().

LayoutWidget* PhotoEditWidget::layout [private]

Pointer to the parent layout widget. Definition at line 140 of file photoEditWidget.h. Referenced by PhotoEditWidget(), and returnFromEdit().

QImage* PhotoEditWidget::originalImage [private]

Backup of image before any manipulations were preformed, allows user to reset image. Definition at line 98 of file photoEditWidget.h. Referenced by adjustExposure(), cropToRegion(), invertSelection(), PhotoEditWidget(), resetImageAction(), returnFromEdit(), setPhoto(), and ~PhotoEditWidget().

Photo* PhotoEditWidget::photo [private]

Pointer to backend photo. Definition at line 94 of file photoEditWidget.h. Referenced by adjustExposure(), cropToRegion(), invertSelection(), PhotoEditWidget(), resetImageAction(), and updateDescription().

QLabel* PhotoEditWidget::photoDescription [private]

Label "Photo Description:". Definition at line 88 of file photoEditWidget.h. Referenced by PhotoEditWidget().

QLineEdit* PhotoEditWidget::photoDescriptionVal [private]

Actual photo description. Definition at line 91 of file photoEditWidget.h. Referenced by PhotoEditWidget(), and setPhoto().

PhotoViewWidget* PhotoEditWidget::photoView [private]

Photo view, provides interface to see image and select regions of it. Definition at line 101 of file photoEditWidget.h. Referenced by adjustExposure(), cropToRegion(), invertSelection(), PhotoEditWidget(), resetImageAction(), and setPhoto().

QPushButton* PhotoEditWidget::redEyeButton [private]

"Red Eye" button Definition at line 125 of file photoEditWidget.h. Referenced by PhotoEditWidget().

QPixmap* PhotoEditWidget::redEyeImage [private]

"Red Eye" image Definition at line 122 of file photoEditWidget.h. Referenced by PhotoEditWidget().

QPushButton* PhotoEditWidget::resetButton [private]

"Reset" button Definition at line 131 of file photoEditWidget.h. Referenced by PhotoEditWidget().

QPixmap* PhotoEditWidget::resetImage [private]

"Reset" image Definition at line 128 of file photoEditWidget.h. Referenced by PhotoEditWidget().

QPushButton* PhotoEditWidget::returnButton [private]

"Return" button Definition at line 137 of file photoEditWidget.h. Referenced by PhotoEditWidget().

QPixmap* PhotoEditWidget::returnImage [private]

"Return" image Definition at line 134 of file photoEditWidget.h. Referenced by PhotoEditWidget().

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The documentation for this class was generated from the following files:

• photoEditWidget.h
• photoEditWidget.cpp

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