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