summaryrefslogtreecommitdiffstats
path: root/kicker/applets/menu/menuapplet.cpp
blob: ae10614c6802c48527e0539622148d636978d2a0 (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
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
/*****************************************************************

Copyright (c) 2002 Siegfried Nijssen <snijssen@liacs.nl>
Copyright (c) 2003 Lubos Lunak <l.lunak@suse.cz>

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

******************************************************************/

#define _MENUAPPLET_CPP_

#include "menuapplet.h"

#include <qlayout.h>
#include <qtooltip.h>
#include <qvariant.h> // avoid X11 #define's

#include <kapplication.h>
#include <kconfig.h>
#include <kdebug.h>
#include <kglobal.h>
#include <klocale.h>
#include <kwin.h>
#include <kwinmodule.h>

#include <netwm.h>

#include <X11/Xlib.h>

/*

 KMenuBar from KDE3.1 and older won't work very well with this applet.
 This is because QMenuBar tries really hard to keep its preffered size,
 se even if the X window for the menubar has the size enforced by this
 applet, Qt thinks it has the size Qt wants. This results in parts
 of the menubar not being repainted. Also, old KMenuBar always forced
 with to be the width of the screen, so even if the menubar has only
 few entries, this applet will still indicate the menubar doesn't
 fit completely in it. There's no way to fix this, besides upgrading
 to KDE3.2.

*/


extern Time qt_x_time;

extern "C"
{
    KDE_EXPORT KPanelApplet* init( QWidget* parent_P, const QString& configFile_P )
    {
      KGlobal::locale()->insertCatalogue("kmenuapplet");
      return new KickerMenuApplet::Applet( configFile_P, parent_P );
    }
}

namespace KickerMenuApplet
{

static const int MOVE_DIFF = 100; // size increment for left/right menu moving
static const int GROW_WIDTH = 10; // width of grow buttons

const long SUPPORTED_WINDOW_TYPES = NET::NormalMask | NET::DesktopMask | NET::DockMask
                | NET::ToolbarMask | NET::MenuMask | NET::DialogMask | NET::OverrideMask
                | NET::TopMenuMask | NET::UtilityMask | NET::SplashMask;

Applet::Applet( const QString& configFile_P, QWidget* parent_P )
    :   KPanelApplet( configFile_P, Normal, 0, parent_P, "menuapplet" ),
        DCOPObject( "menuapplet" ),
        module( NULL ),
	active_menu( NULL ),
        selection( NULL ),
        selection_watcher( NULL ),
        desktop_menu( false ),
        topEdgeOffset( 0 )
    {
    setBackgroundOrigin(AncestorOrigin);
    dcopclient.registerAs( "menuapplet", false );
    // toolbarAppearanceChanged(int) is sent when changing macstyle
    connect( kapp, SIGNAL( toolbarAppearanceChanged( int )),
        this, SLOT( readSettings()));
    claimSelection();
    readSettings();
    updateTopEdgeOffset();
    }

Applet::~Applet()
    {
    lostSelection(); // release all menu's before really loosing the selection
    delete selection;
    delete selection_watcher;
    delete module;
    KGlobal::locale()->removeCatalogue("kmenuapplet");
    }

void Applet::windowAdded( WId w_P )
    {
    NETWinInfo info( qt_xdisplay(), w_P, qt_xrootwin(), NET::WMWindowType );
    if( info.windowType( SUPPORTED_WINDOW_TYPES ) != NET::TopMenu )
	return;
//    kdDebug() << "embedding:" << w_P << endl;
    Window transient_for = KWin::transientFor( w_P );
    if( transient_for == None )
	return;
    MenuEmbed* embed;
    if( transient_for == qt_xrootwin())
    {
        embed = new MenuEmbed( transient_for, true, this );
    }
    else
        {
        KWin::WindowInfo info2 = KWin::windowInfo( transient_for, NET::WMWindowType );
        embed = new MenuEmbed( transient_for,
            info2.windowType( SUPPORTED_WINDOW_TYPES ) == NET::Desktop, this );
        }
        embed->hide();
    embed->move( 0, -topEdgeOffset );
    embed->resize( embed->width(), height() + topEdgeOffset );
    embed->embed( w_P );
    if( embed->embeddedWinId() == None )
	{
	delete embed;
	return;
	}
    menus.append( embed );
    // in case the app mapped its menu after its mainwindow, check which menu should be shown
    activeWindowChanged( module->activeWindow());
    }

// - if the active window has its topmenu -> show the menu
// - if desktop menu is enabled (i.e. explicitly in kdesktop) :
//   - show it
//   - otherwise show nothing
void Applet::activeWindowChanged( WId w_P )
    {
//    kdDebug() << "active:" << w_P << endl;
    for( WId window = w_P;
	 window != None;
	 window = tryTransientFor( window ))
	{
	for( QValueList< MenuEmbed* >::ConstIterator it = menus.begin();
	     it != menus.end();
	     ++it )
	    {
	    if( window == (*it)->mainWindow())
                {
                activateMenu( *it );
	        return;
		}
	    }
	}
//    kdDebug() << "no active" << endl;
    // No menu for active window found - if desktop menu
    // (in kdesktoprc) is enabled, use kdesktop's menu instead of none.
    bool try_desktop = desktop_menu;
    if( !try_desktop && w_P != None )
        { // also use the desktop menu if the active window is desktop
        KWin::WindowInfo info = KWin::windowInfo( w_P, NET::WMWindowType );
        if( info.windowType( SUPPORTED_WINDOW_TYPES ) == NET::Desktop )
            try_desktop = true;
        }
    if( try_desktop )
        {
	for( QValueList< MenuEmbed* >::ConstIterator it = menus.begin();
	     it != menus.end();
	     ++it )
	    {
            if( (*it)->isDesktopMenu())
                {
                activateMenu( *it );
                return;
                }
            }
        }
    activateMenu( NULL );
    }

void Applet::activateMenu( MenuEmbed* embed_P )
    {
    if( embed_P != active_menu )
	{
//        kdDebug() << "activate:" << embed_P << endl;
	if( active_menu != NULL )
	    active_menu->hide();
	active_menu = embed_P;
    if( active_menu != NULL )
    {
	    active_menu->show();
        //if (embed->isDesktopMenu())
        {
            active_menu->setMinimumSize( width(), height() + topEdgeOffset );
        }
    }
    emit updateLayout();
    }
    
    setBackground();
    }

void Applet::updateMenuGeometry( MenuEmbed* embed )
    {
    if( embed == active_menu )
        emit updateLayout();
    }

// If there's no menu for the window, try finding menu for its mainwindow
// (where the window's WM_TRANSIENT_FOR property points).
// If the window is modal (_NET_WM_STATE_MODAL), stop.
WId Applet::tryTransientFor( WId w_P )
    {
    KWin::WindowInfo info = KWin::windowInfo( w_P, NET::WMState );
    if( info.state() & NET::Modal )
	return None;
    WId ret = KWin::transientFor( w_P );
    if( ret == qt_xrootwin())
        ret = None;
    return ret;
    }

void Applet::menuLost( MenuEmbed* embed )
    {
    for( QValueList< MenuEmbed* >::Iterator it = menus.begin();
	 it != menus.end();
	 ++it )
	{
	if( *it == embed )
	    {
	    menus.remove( it );
	    embed->deleteLater();
//	    kdDebug() << "deleting:" << (*it)->mainWindow() << endl;
	    if( embed == active_menu )
		{
		active_menu = NULL;
		// trigger selecting new active menu
		activeWindowChanged( module->activeWindow());
		}
	    return;
	    }
	}
    }

void Applet::positionChange( Position )
    {
    updateTopEdgeOffset();
    }

// Detect mouse movement at the top screen edge also if the menubar
// has a popup open - in such case, Qt has a grab, and this avoids
// Kicker's FittsLawFrame. Therefore move the menubar a bit higher,
// so that it actually is positioned exactly at the screen edge
// (i.e. at a negative y coordinate within this applet, due to
// Kicker's frame).
void Applet::updateTopEdgeOffset()
    {
    QPoint p = topLevelWidget()->mapToGlobal( QPoint( 0, 0 ));
    if( p.y() <= 2 ) // 2 = work also when running in appletproxy
        topEdgeOffset = mapToGlobal( QPoint( 0, 0 )).y() - p.y();
    else
        topEdgeOffset = 0;
    if( active_menu != NULL )
        active_menu->move( active_menu->x(), -topEdgeOffset );
    }

void Applet::paletteChange(const QPalette & /* oldPalette */)
{
    setBackground();
}

void Applet::moveEvent( QMoveEvent* )
{
    setBackground();
}

void Applet::setBackground()
{
    if (active_menu)
        active_menu->setBackground();
}

void Applet::claimSelection()
    {
    assert( selection == NULL );
    selection = new KSelectionOwner( makeSelectionAtom(), DefaultScreen( qt_xdisplay()));
// force taking the selection, but don't kill previous owner
    if( selection->claim( true, false ))
	{
        delete selection_watcher;
        selection_watcher = NULL;
        connect( selection, SIGNAL( lostOwnership()), SLOT( lostSelection()));
        module = new KWinModule;
	connect( module, SIGNAL( windowAdded( WId )), this, SLOT( windowAdded( WId )));
	connect( module, SIGNAL( activeWindowChanged( WId )),
	    this, SLOT( activeWindowChanged( WId )));
	QValueList< WId > windows = module->windows();
	for( QValueList< WId >::ConstIterator it = windows.begin();
	     it != windows.end();
	     ++it )
	    windowAdded( *it );
	activeWindowChanged( module->activeWindow());
	}
    else
        lostSelection();
    }

void Applet::lostSelection()
    {
    if( selection == NULL )
        return;
//    kdDebug() << "lost selection" << endl;
    for( QValueList< MenuEmbed* >::ConstIterator it = menus.begin();
	 it != menus.end();
	 ++it )
	delete (*it); // delete all MenuEmbed's = release all menus
    menus.clear();
    active_menu = NULL;
    if( selection_watcher == NULL )
        {
        selection_watcher = new KSelectionWatcher( makeSelectionAtom(), DefaultScreen( qt_xdisplay()));
        connect( selection_watcher, SIGNAL( lostOwner()), this, SLOT( claimSelection()));
        }
    delete module;
    module = NULL;
    selection->deleteLater();
    selection = NULL;
    // selection_watcher stays
    }

void Applet::readSettings()
    {
    KConfig cfg( "kdesktoprc", true );
    cfg.setGroup( "Menubar" );
    desktop_menu = cfg.readBoolEntry( "ShowMenubar", false );
    cfg.setGroup( "KDE" );
    if( cfg.readBoolEntry( "macStyle", false ) || desktop_menu )
        QToolTip::remove( this );
    else
        QToolTip::add( this, i18n(
            "You do not appear to have enabled the standalone menubar; "
            "enable it in the Behavior control module for desktop." ));
    if( !isDisabled() && active_menu == NULL )
        activeWindowChanged( module->activeWindow()); //enforce desktop_menu
    }

void Applet::configure()
    {
    readSettings();
    }

int Applet::widthForHeight( int ) const
    {
    if (active_menu)
        return active_menu->width();
    return 0; // we're stretch applet
    }

int Applet::heightForWidth( int ) const
    {
    // *shrug* running this applet in vertical mode is a bad idea anyway
    return 50;
    }

static Atom selection_atom = None;
static Atom msg_type_atom = None;

static
void initAtoms()
    {
    char nm[ 100 ];
    sprintf( nm, "_KDE_TOPMENU_OWNER_S%d", DefaultScreen( qt_xdisplay()));
    char nm2[] = "_KDE_TOPMENU_MINSIZE";
    char* names[ 2 ] = { nm, nm2 };
    Atom atoms[ 2 ];
    XInternAtoms( qt_xdisplay(), names, 2, False, atoms );
    selection_atom = atoms[ 0 ];
    msg_type_atom = atoms[ 1 ];
    }

Atom Applet::makeSelectionAtom()
    {
    if( selection_atom == None )
	initAtoms();
    return selection_atom;
    }

MenuEmbed::MenuEmbed( WId mainwindow_P, bool desktop_P,
    QWidget* parent_P, const char* name_P )
    :   QXEmbed( parent_P, name_P ),
	main_window( mainwindow_P ),
        desktop( desktop_P )
    {
    setAutoDelete( false );
    }

void MenuEmbed::windowChanged( WId w_P )
    {
    if( w_P == None )
	static_cast< Applet* >( parent())->menuLost( this );
    }

bool MenuEmbed::x11Event( XEvent* ev_P )
    {
    if( ev_P->type == ConfigureRequest
	&& ev_P->xconfigurerequest.window == embeddedWinId()
        && ev_P->xconfigurerequest.value_mask & ( CWWidth | CWHeight ))
        {
	XConfigureRequestEvent& ev = ev_P->xconfigurerequest;
        QSize new_size = size();
        if( ev.value_mask & CWWidth )
            new_size.setWidth( ev.width );
        if( ev.value_mask & CWHeight )
            new_size.setHeight( ev.height );
	// resize when the embedded window resizes (still obey min size)
//	kdDebug() << "RES:" << embeddedWinId() << ":" << ev.width << ":" << ev.height << endl;
	if( ev.width != width() || ev.height != height())
            {
            resize( ev.width, ev.height );
            static_cast< Applet* >( parent())->updateMenuGeometry( this );
            }
	sendSyntheticConfigureNotifyEvent();
//        int x, y;
//        unsigned int w, h, d, b;
//        Window root;
//        XGetGeometry( qt_xdisplay(), embeddedWinId(), &root, &x, &y, &w, &h, &b, &d );
//        kdDebug() << "RES3:" << width() << ":" << height() << ":" << w << ":" << h << endl;
	return true;
	}
    return QXEmbed::x11Event( ev_P );
    }

void MenuEmbed::sendSyntheticConfigureNotifyEvent()
{
    QPoint globalPos = mapToGlobal(QPoint(0,0));
    if (embeddedWinId()) {
        XConfigureEvent c;
        memset(&c, 0, sizeof(c));
        c.type = ConfigureNotify;
        c.display = qt_xdisplay();
        c.send_event = True;
        c.event = embeddedWinId();
        c.window = winId();
        c.x = globalPos.x();
        c.y = globalPos.y();
        c.width = width();
        c.height = height();
        c.border_width = 0;
        c.above = None;
        c.override_redirect = 0;
        XSendEvent(qt_xdisplay(), c.event, true, StructureNotifyMask, (XEvent*)&c);
    }
}

void MenuEmbed::setMinimumSize( int w, int h )
{
    QXEmbed::setMinimumSize( w, h );
    // tell the menubar also the allowed minimum size
    // the applet won't allow resizing to smaller size
    if( embeddedWinId() != None )
        {
//        kdDebug() << "RES2:" << width() << ":" << height() << ":" << minimumWidth() << ":" << minimumHeight() << endl;
        XEvent ev;
        ev.xclient.display = qt_xdisplay();
        ev.xclient.type = ClientMessage;
        ev.xclient.window = embeddedWinId();
        assert( msg_type_atom != None );
        ev.xclient.message_type = msg_type_atom;
        ev.xclient.format = 32;
        ev.xclient.data.l[0] = qt_x_time;
        ev.xclient.data.l[1] = minimumWidth();
        ev.xclient.data.l[2] = minimumHeight();
        ev.xclient.data.l[3] = 0;
        ev.xclient.data.l[4] = 0;
        XSendEvent( qt_xdisplay(), embeddedWinId(), False, NoEventMask, &ev );
        }
}

void MenuEmbed::setBackground()
{
    const QPixmap *pbg = parentWidget()->backgroundPixmap();
    
    if (pbg)
    {
        QPixmap bg(width(), height());
        bg.fill(parentWidget(), pos());
        setPaletteBackgroundPixmap(bg);
        setBackgroundOrigin(WidgetOrigin);
    }
    else
        unsetPalette();
    
    hide();
    show();
    //XClearArea(x11Display(), embeddedWinId(), 0, 0, 0, 0, True);
}

} // namespace

#include "menuapplet.moc"