1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
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 <tqfont.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 TQString &capText, TQWidget *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, TQT_TQOBJECT(this), TQT_SLOT (close()), actionCollection());
action->plug (toolBar());
action = new KAction (i18n ("Save Image"), "filesave", CTRL+Key_S, TQT_TQOBJECT(this), TQT_SLOT (saveFileToDisc()), actionCollection());
action->plug (toolBar());
statusBar()->insertItem( capText, 0, 1, true );
statusBar()->setItemAlignment( 0, AlignLeft | AlignVCenter );
TQFont 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()<<TQString("remove of %1 failed").arg(file->name())<<endl;
file->setName (file->name() + ".part"); // set new suffix to filename
kdDebug()<<TQString("try to remove %1").arg( file->name())<<endl;
if (file->remove())
kdDebug()<<"file removed\n";
else
kdDebug()<<"file not removed\n";
}
}
void ImageViewer::paintEvent (TQPaintEvent */*ev*/)
{
bitBlt (this, 0, toolBar()->height() + 1, &pix);
}
void ImageViewer::resizeEvent (TQResizeEvent */*ev*/)
{
if ( !downloadJob ) // only if image is loaded
pix = kpix.convertToPixmap ( image.smoothScale ( size().width() , size().height() - toolBar()->height() - statusBar()->height() ) ); // convert TQImage to TQPixmap (fastest method)
update();
}
void ImageViewer::closeEvent (TQCloseEvent *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 (TQKeyEvent *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 (TQKeyEvent *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, TQT_SIGNAL (result (KIO::Job *)), TQT_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
{
TQString 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() );
}
TQRect 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())
{
TQFile f (newURL.directory() + "/" + newURL.fileName());
if (f.exists())
{
int r=KMessageBox::warningContinueCancel(TQT_TQWIDGET(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, (TQWidget*) 0))
{
TQString 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"
|
