#include <addPhotosDialog.h>
Public Member Functions | |
FilePreview (QWidget *parent=0) | |
~FilePreview () | |
QSize | minimumSizeHint () const |
void | previewUrl (const QUrl &) |
declared to make base class happy. we'll use an updatePreview function instead | |
void | updatePreview (const QString &path) |
call this function to update the file preview | |
Protected Member Functions | |
void | customEvent (QCustomEvent *e) |
handle update events that come from the GeneratePreviewThread | |
Private Attributes | |
QLabel * | filePreview |
preview of last selected file | |
QLabel * | fileDetails |
details about last selected file | |
GeneratePreviewThread * | generatorThread |
a worker thread that actually generates the file preview image and details information that is displayed. |
Definition at line 55 of file addPhotosDialog.h.
FilePreview::FilePreview | ( | QWidget * | parent = 0 |
) |
Definition at line 173 of file addPhotosDialog.cpp.
References fileDetails, filePreview, and generatorThread.
00173 : QWidget(parent) 00174 { 00175 //create widgets for display preview image and details 00176 filePreview = new QLabel( this ); 00177 fileDetails = new QLabel( this ); 00178 00179 QGridLayout* grid = new QGridLayout( this, 4, 3 ); 00180 grid->setRowStretch( 0, 1 ); 00181 grid->addWidget( filePreview, 1, 1, Qt::AlignHCenter ); 00182 grid->addWidget( fileDetails, 2, 1, Qt::AlignHCenter ); 00183 grid->setRowStretch( 3, 1 ); 00184 00185 grid->setColStretch( 0, 1 ); 00186 grid->setColStretch( 2, 1 ); 00187 00188 //create a generator thread that will be used for actually generating 00189 //preview images and constructing details strings 00190 generatorThread = new GeneratePreviewThread(this); 00191 }
FilePreview::~FilePreview | ( | ) |
Definition at line 193 of file addPhotosDialog.cpp.
References generatorThread.
00194 { 00195 //make sure generator thread is done! 00196 generatorThread->wait(); 00197 delete generatorThread; 00198 generatorThread = NULL; 00199 }
void FilePreview::customEvent | ( | QCustomEvent * | e | ) | [protected] |
handle update events that come from the GeneratePreviewThread
Definition at line 207 of file addPhotosDialog.cpp.
References fileDetails, filePreview, UpdatePreviewEvent::getDetails(), UpdatePreviewEvent::getImage(), and UPDATE_PREVIEW_DETAILS.
00208 { 00209 //handle UpdatePrevewEvents that are sent from the worker thread 00210 //by update the preview image and details that are shown 00211 if ( e->type() == UPDATE_PREVIEW_DETAILS ) 00212 { 00213 UpdatePreviewEvent* upe = (UpdatePreviewEvent*)e; 00214 00215 if( !upe->getImage().isNull() ) 00216 { 00217 QPixmap scaledPixmap; 00218 scaledPixmap.convertFromImage( upe->getImage() ); 00219 filePreview->setPixmap( scaledPixmap ); 00220 } 00221 00222 fileDetails->setText( upe->getDetails() ); 00223 } 00224 }
QSize FilePreview::minimumSizeHint | ( | ) | const |
Definition at line 201 of file addPhotosDialog.cpp.
References MIN_HEIGHT, and MIN_WIDTH.
00202 { 00203 QFontMetrics fm( font() ); 00204 return QSize(MIN_WIDTH, MIN_HEIGHT + 2*fm.height() ); 00205 }
void FilePreview::previewUrl | ( | const QUrl & | ) | [inline] |
declared to make base class happy. we'll use an updatePreview function instead
Definition at line 63 of file addPhotosDialog.h.
void FilePreview::updatePreview | ( | const QString & | path | ) |
call this function to update the file preview
Definition at line 226 of file addPhotosDialog.cpp.
References generatorThread, and GeneratePreviewThread::start().
Referenced by AddPhotosDialog::updatePreview().
00227 { 00228 //handle requests to update the preview information by asking 00229 //the generator thread to handle them. by using 00230 //an auxiallary thread we can process requests very quickly while 00231 //any current work being done to generate an image preview continues 00232 if( generatorThread != NULL) 00233 { 00234 generatorThread->start( filename ); 00235 } 00236 }
QLabel* FilePreview::fileDetails [private] |
details about last selected file
Definition at line 77 of file addPhotosDialog.h.
Referenced by customEvent(), and FilePreview().
QLabel* FilePreview::filePreview [private] |
preview of last selected file
Definition at line 74 of file addPhotosDialog.h.
Referenced by customEvent(), and FilePreview().
a worker thread that actually generates the file preview image and details information that is displayed.
Definition at line 82 of file addPhotosDialog.h.
Referenced by FilePreview(), updatePreview(), and ~FilePreview().