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Diffstat (limited to 'kstars/kstars/imageviewer.cpp')
| -rw-r--r-- | kstars/kstars/imageviewer.cpp | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/kstars/kstars/imageviewer.cpp b/kstars/kstars/imageviewer.cpp new file mode 100644 index 00000000..1a277ed2 --- /dev/null +++ b/kstars/kstars/imageviewer.cpp @@ -0,0 +1,244 @@ +/*************************************************************************** + imageviewer.cpp - An ImageViewer for KStars + ------------------- + begin : Mon Aug 27 2001 + copyright : (C) 2001 by Thomas Kabelmann + email : tk78@gmx.de + ***************************************************************************/ + +/*************************************************************************** + * * + * This program is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + ***************************************************************************/ + +#include <qfont.h> + +#include <klocale.h> +#include <kmessagebox.h> +#include <kfiledialog.h> +#include <kstatusbar.h> +#include <kio/netaccess.h> +#include <kaction.h> +#include <kaccel.h> +#include <kdebug.h> +#include "imageviewer.h" + +#include <kapplication.h> + +ImageViewer::ImageViewer (const KURL *url, const QString &capText, QWidget *parent, const char *name) + : KMainWindow (parent, name), imageURL (*url), fileIsImage (false), + ctrl (false), key_s (false), key_q (false), downloadJob(0) +{ +// toolbar can dock only on top-position and can't be minimized +// JH: easier to just disable its mobility + toolBar()->setMovingEnabled( false ); + + KAction *action = new KAction (i18n ("Close Window"), "fileclose", CTRL+Key_Q, this, SLOT (close()), actionCollection()); + action->plug (toolBar()); + action = new KAction (i18n ("Save Image"), "filesave", CTRL+Key_S, this, SLOT (saveFileToDisc()), actionCollection()); + action->plug (toolBar()); + + statusBar()->insertItem( capText, 0, 1, true ); + statusBar()->setItemAlignment( 0, AlignLeft | AlignVCenter ); + QFont fnt = statusBar()->font(); + fnt.setPointSize( fnt.pointSize() - 2 ); + statusBar()->setFont( fnt ); + + if (!imageURL.isValid()) //check URL + kdDebug()<<"URL is malformed"<<endl; + setCaption (imageURL.fileName()); // the title of the window + loadImageFromURL(); +} + +ImageViewer::~ImageViewer() { +// check if download job is running + checkJob(); + + if (!file->remove()) // if the file was not complete downloaded the suffix is ".part" + { + kdDebug()<<QString("remove of %1 failed").arg(file->name())<<endl; + file->setName (file->name() + ".part"); // set new suffix to filename + kdDebug()<<QString("try to remove %1").arg( file->name())<<endl; + if (file->remove()) + kdDebug()<<"file removed\n"; + else + kdDebug()<<"file not removed\n"; + } +} + +void ImageViewer::paintEvent (QPaintEvent */*ev*/) +{ + bitBlt (this, 0, toolBar()->height() + 1, &pix); +} + +void ImageViewer::resizeEvent (QResizeEvent */*ev*/) +{ + if ( !downloadJob ) // only if image is loaded + pix = kpix.convertToPixmap ( image.smoothScale ( size().width() , size().height() - toolBar()->height() - statusBar()->height() ) ); // convert QImage to QPixmap (fastest method) + + update(); +} + +void ImageViewer::closeEvent (QCloseEvent *ev) +{ + if (ev) // not if closeEvent (0) is called, because segfault + ev->accept(); // parent-widgets should not get this event, so it will be filtered + this->~ImageViewer(); // destroy the object, so the object can only allocated with operator new, not as a global/local variable +} + + +void ImageViewer::keyPressEvent (QKeyEvent *ev) +{ + ev->accept(); //make sure key press events are captured. + switch (ev->key()) + { + case Key_Control : ctrl = true; break; + case Key_Q : key_q = true; break; + case Key_S : key_s = true; break; + default : ev->ignore(); + } + if (ctrl && key_q) + close(); + if (ctrl && key_s) + { + ctrl = false; + key_s = false; + saveFileToDisc(); + } +} + +void ImageViewer::keyReleaseEvent (QKeyEvent *ev) +{ + ev->accept(); + switch (ev->key()) + { + case Key_Control : ctrl = false; break; + case Key_Q : key_q = false; break; + case Key_S : key_s = false; break; + default : ev->ignore(); + } +} + +void ImageViewer::loadImageFromURL() +{ + file = tempfile.file(); + tempfile.unlink(); // we just need the name and delete the tempfile from disc; if we don't do it, a dialog will be shown + KURL saveURL (file->name()); + if (!saveURL.isValid()) + kdDebug()<<"tempfile-URL is malformed\n"; + + downloadJob = KIO::copy (imageURL, saveURL); // starts the download asynchron + connect (downloadJob, SIGNAL (result (KIO::Job *)), SLOT (downloadReady (KIO::Job *))); +} + +void ImageViewer::downloadReady (KIO::Job *job) +{ +// set downloadJob to 0, but don't delete it - the job will automatically deleted !!! + downloadJob = 0; + + if ( job->error() ) + { + job->showErrorDialog(); + closeEvent (0); + return; // exit this function + } + + file->close(); // to get the newest informations of the file and not any informations from opening of the file + + if ( file->exists() ) + { + showImage(); + return; + } + closeEvent (0); +} + +void ImageViewer::showImage() +{ + if (!image.load (file->name())) // if loading failed + { + QString text = i18n ("Loading of the image %1 failed."); + KMessageBox::error (this, text.arg (imageURL.prettyURL() )); + closeEvent (0); + return; + } + fileIsImage = true; // we loaded the file and know now, that it is an image + + //First, if the image is less wide than the statusBar, we have to scale it up. + if ( image.width() < statusBar()->width() ) { + image.smoothScale ( statusBar()->width() , image.height() * statusBar()->width() / image.width() ); + } + + QRect deskRect = kapp->desktop()->availableGeometry(); + int w = deskRect.width(); // screen width + int h = deskRect.height(); // screen height + int h2 = image.height() + toolBar()->height() + statusBar()->height(); //height required for ImageViewer + if (image.width() <= w && h2 <= h) + resize ( image.width(), h2 ); + +//If the image is larger than screen width and/or screen height, shrink it to fit the screen +//while preserving the original aspect ratio + + else if (image.width() <= w) //only the height is too large + resize ( int( image.width()*h/h2 ), h ); + else if (image.height() <= h) //only the width is too large + resize ( w, int( h2*w/image.width() ) ); + else { //uh-oh...both width and height are too large. which needs to be shrunk least? + float fx = float(w)/float(image.width()); + float fy = float(h)/float(h2); + if (fx > fy) //width needs to be shrunk less, so shrink to fit in height + resize ( int( image.width()*fy ), h ); + else //vice versa + resize ( w, int( h2*fx ) ); + } + + show(); // hide is default +// pix will be initialized in resizeEvent(), which will automatically called first time +} + +void ImageViewer::saveFileToDisc() +{ + KURL newURL = KFileDialog::getSaveURL(imageURL.fileName()); // save-dialog with default filename + if (!newURL.isEmpty()) + { + QFile f (newURL.directory() + "/" + newURL.fileName()); + if (f.exists()) + { + int r=KMessageBox::warningContinueCancel(static_cast<QWidget *>(parent()), + i18n( "A file named \"%1\" already exists. " + "Overwrite it?" ).arg(newURL.fileName()), + i18n( "Overwrite File?" ), + i18n( "&Overwrite" ) ); + if(r==KMessageBox::Cancel) return; + + f.remove(); + } + saveFile (newURL); + } +} + +void ImageViewer::saveFile (KURL &url) { +// synchronous Access to prevent segfaults + if (!KIO::NetAccess::copy (KURL (file->name()), url, (QWidget*) 0)) + { + QString text = i18n ("Saving of the image %1 failed."); + KMessageBox::error (this, text.arg (url.prettyURL() )); + } +} + +void ImageViewer::close() { + closeEvent (0); +} + +void ImageViewer::checkJob() { + if ( downloadJob ) { // if download job is running + downloadJob->kill( true ); // close job quietly, without emitting a result + kdDebug() << "Download job killed"; + } +} + +#include "imageviewer.moc" |