summaryrefslogtreecommitdiffstats
path: root/kdeui/krootpixmap.cpp
blob: e0716259ee3e1a028e20df24b1e4c38cf719da60 (plain)
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
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
/* vi: ts=8 sts=4 sw=4
 *
 *
 * This file is part of the KDE project, module kdeui.
 * Copyright (C) 1999,2000 Geert Jansen <jansen@kde.org>
 *
 * You can Freely distribute this program under the GNU Library
 * General Public License. See the file "COPYING.LIB" for the exact
 * licensing terms.
 */

#include <tqwidget.h>
#include <tqtimer.h>
#include <tqrect.h>
#include <tqimage.h>

#include <kapplication.h>
#include <kimageeffect.h>
#include <kpixmapio.h>
#include <kwinmodule.h>
#include <kwin.h>
#include <kdebug.h>
#include <netwm.h>
#include <dcopclient.h>
#include <dcopref.h>

#include <ksharedpixmap.h>
#include <krootpixmap.h>


static TQString wallpaperForDesktop(int desktop)
{
    return DCOPRef("kdesktop", "KBackgroundIface").call("currentWallpaper", desktop);
}

class KRootPixmapData
{
public:
    TQWidget *toplevel;
#ifdef Q_WS_X11
    KWinModule *kwin;
#endif
};


KRootPixmap::KRootPixmap( TQWidget *widget, const char *name )
    : TQObject(widget, name ? name : "KRootPixmap" ), m_Desk(0), m_pWidget(widget)
{
    init();
}

KRootPixmap::KRootPixmap( TQWidget *widget, TQObject *parent, const char *name )
    : TQObject( parent, name ? name : "KRootPixmap" ), m_Desk(0), m_pWidget(widget)
{
    init();
}

void KRootPixmap::init()
{
    d = new KRootPixmapData;
    m_Fade = 0;
    m_BlurRadius = 0;
    m_BlurSigma = 0;
    m_pPixmap = new KSharedPixmap; //ordinary KPixmap on win32
    m_pTimer = new TQTimer( this );
    m_bInit = false;
    m_bActive = false;
    m_bCustomPaint = false;

    connect(kapp, TQT_SIGNAL(backgroundChanged(int)), TQT_SLOT(slotBackgroundChanged(int)));
    connect(m_pTimer, TQT_SIGNAL(timeout()), TQT_SLOT(repaint()));
#ifdef Q_WS_X11
    connect(m_pPixmap, TQT_SIGNAL(done(bool)), TQT_SLOT(slotDone(bool)));

    d->kwin = new KWinModule( this );
    connect(d->kwin, TQT_SIGNAL(windowChanged(WId, unsigned int)), TQT_SLOT(desktopChanged(WId, unsigned int)));
    connect(d->kwin, TQT_SIGNAL(currentDesktopChanged(int)), TQT_SLOT(desktopChanged(int)));
#endif

    d->toplevel = m_pWidget->topLevelWidget();
    d->toplevel->installEventFilter(this);
    m_pWidget->installEventFilter(this);
}

KRootPixmap::~KRootPixmap()
{
    delete m_pPixmap;
    delete d;
}


int KRootPixmap::currentDesktop() const
{
#ifdef Q_WS_X11
    NETRootInfo rinfo( qt_xdisplay(), NET::CurrentDesktop );
    rinfo.activate();
    return rinfo.currentDesktop();
#else
    //OK?
    return TQApplication::desktop()->screenNumber(m_pWidget);
#endif
}


void KRootPixmap::start()
{
    if (m_bActive)
	return;

    m_bActive = true;
    if ( !isAvailable() )
    {
	// We will get a KIPC message when the shared pixmap is available.
	enableExports();
	return;
    }
    if (m_bInit)
	repaint(true);
}


void KRootPixmap::stop()
{
    m_bActive = false;
    m_pTimer->stop();
}


void KRootPixmap::setFadeEffect(double fade, const TQColor &color)
{
    if (fade < 0)
	m_Fade = 0;
    else if (fade > 1)
	m_Fade = 1;
    else
	m_Fade = fade;
    m_FadeColor = color;

    if ( m_bActive && m_bInit ) repaint(true);
}

void KRootPixmap::setBlurEffect(double radius, double sigma)
{
    m_BlurRadius = radius;
    m_BlurSigma = sigma;
}

bool KRootPixmap::eventFilter(TQObject *, TQEvent *event)
{
    // Initialise after the first show or paint event on the managed widget.
    if (!m_bInit && ((event->type() == TQEvent::Show) || (event->type() == TQEvent::Paint)))
    {
	m_bInit = true;
	m_Desk = currentDesktop();
    }

    if (!m_bActive)
	return false;

    switch (event->type())
    {
    case TQEvent::Resize:
    case TQEvent::Move:
	m_pTimer->start(100, true);
	break;

    case TQEvent::Paint:
	m_pTimer->start(0, true);
	break;

    case TQEvent::Reparent:
        d->toplevel->removeEventFilter(this);
        d->toplevel = m_pWidget->topLevelWidget();
        d->toplevel->installEventFilter(this);
        break;

    default:
	break;
    }

    return false; // always continue processing
}

void KRootPixmap::desktopChanged(int desktop)
{
    if (wallpaperForDesktop(m_Desk) == wallpaperForDesktop(desktop) &&
	!wallpaperForDesktop(m_Desk).isNull())
	return;

#ifdef Q_WS_X11
    if (KWin::windowInfo(m_pWidget->topLevelWidget()->winId()).desktop() == NET::OnAllDesktops &&
	pixmapName(m_Desk) != pixmapName(desktop))
#endif
	repaint(true);
}

void KRootPixmap::desktopChanged( WId window, unsigned int properties )
{
#ifdef Q_WS_X11
    if( !(properties & NET::WMDesktop) ||
	(window != m_pWidget->topLevelWidget()->winId()))
	return;
#endif

    kdDebug() << k_funcinfo << endl;
    repaint(true);
}

void KRootPixmap::repaint()
{
    repaint(false);
}


void KRootPixmap::repaint(bool force)
{
    TQPoint p1 = m_pWidget->mapToGlobal(m_pWidget->rect().topLeft());
    TQPoint p2 = m_pWidget->mapToGlobal(m_pWidget->rect().bottomRight());
    if (!force && (m_Rect == TQRect(p1, p2)))
	return;

    // Due to northwest bit gravity, we don't need to do anything if the
    // bottom right corner of the widget is moved inward.
    // That said, konsole clears the background when it is resized, so
    // we have to reset the background pixmap.
    if ((p1 == m_Rect.topLeft()) && (m_pWidget->width() < m_Rect.width()) &&
	(m_pWidget->height() < m_Rect.height())
       )
    {
        m_Rect = TQRect(p1, p2);
 	updateBackground( m_pPixmap );
	return;
    }
    m_Rect = TQRect(p1, p2);
#ifdef Q_WS_X11
    m_Desk = KWin::windowInfo(m_pWidget->topLevelWidget()->winId()).desktop();
    if (m_Desk == NET::OnAllDesktops)
	m_Desk = currentDesktop();

    // KSharedPixmap will correctly generate a tile for us.
    m_pPixmap->loadFromShared(pixmapName(m_Desk), m_Rect);
#else
	m_Desk = currentDesktop();
    // !x11 note: tile is not generated!
    // TODO: pixmapName() is a nonsense now!
    m_pPixmap->load( pixmapName(m_Desk) );
    if (!m_pPixmap->isNull()) {
        m_pPixmap->resize( m_Rect.size() );
        slotDone(true);
    }
#endif
}

bool KRootPixmap::isAvailable() const
{
#ifdef Q_WS_X11
    return m_pPixmap->isAvailable(pixmapName(m_Desk));
#else
    return m_pPixmap->isNull();
#endif
}

TQString KRootPixmap::pixmapName(int desk) {
    TQString pattern = TQString("DESKTOP%1");
#ifdef Q_WS_X11
    int screen_number = DefaultScreen(qt_xdisplay());
    if (screen_number) {
        pattern = TQString("SCREEN%1-DESKTOP").arg(screen_number) + "%1";
    }
#endif
    return pattern.arg( desk );
}


void KRootPixmap::enableExports()
{
#ifdef Q_WS_X11
    kdDebug(270) << k_lineinfo << "activating background exports.\n";
    DCOPClient *client = kapp->dcopClient();
    if (!client->isAttached())
	client->attach();
    TQByteArray data;
    TQDataStream args( data, IO_WriteOnly );
    args << 1;

    TQCString appname( "kdesktop" );
    int screen_number = DefaultScreen(qt_xdisplay());
    if ( screen_number )
        appname.sprintf("kdesktop-screen-%d", screen_number );

    client->send( appname, "KBackgroundIface", "setExport(int)", data );
#endif
}


void KRootPixmap::slotDone(bool success)
{
    if (!success)
    {
	kdWarning(270) << k_lineinfo << "loading of desktop background failed.\n";
	return;
    }

    // We need to test active as the pixmap might become available
    // after the widget has been destroyed.
    if ( m_bActive )
	updateBackground( m_pPixmap );
}

void KRootPixmap::updateBackground( KSharedPixmap *spm )
{
    TQPixmap pm = *spm;

    if (m_Fade > 1e-6)
    {
	KPixmapIO io;
	TQImage img = io.convertToImage(pm);
	img = KImageEffect::fade(img, m_Fade, m_FadeColor);
	pm = io.convertToPixmap(img);
    }

    if ((m_BlurRadius > 1e-6) || (m_BlurSigma > 1e-6))
    {
        KPixmapIO io;
        TQImage img = io.convertToImage(pm);
        img = KImageEffect::blur(img, m_BlurRadius, m_BlurSigma);
        pm = io.convertToPixmap(img);
    }

    if ( !m_bCustomPaint )
	m_pWidget->setBackgroundPixmap( pm );
    else {
	emit backgroundUpdated( pm );
    }
}


void KRootPixmap::slotBackgroundChanged(int desk)
{
    if (!m_bInit || !m_bActive)
	return;

    if (desk == m_Desk)
	repaint(true);
}

#include "krootpixmap.moc"