summaryrefslogtreecommitdiffstats
path: root/src/gui/kernel/qdesktopwidget_win.cpp
blob: 1b2dfe7a823a77ac1f852e09834a6ffaa194abcd (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
/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qdesktopwidget.h"
#include "qt_windows.h"
#include "qapplication_p.h"
#include <private/qsystemlibrary_p.h>
#include <qvector.h>
#include <limits.h>
#ifdef Q_WS_WINCE
#include <sipapi.h>
#endif
#include "qwidget_p.h"
#include "qdebug.h"

QT_BEGIN_NAMESPACE

class QDesktopWidgetPrivate : public QWidgetPrivate
{
public:
    QDesktopWidgetPrivate();
    ~QDesktopWidgetPrivate();

    static void init(QDesktopWidget *that);
    static void cleanup();
    static int screenCount;
    static int primaryScreen;

    static QVector<QRect> *rects;
    static QVector<QRect> *workrects;

    struct MONITORINFO
    {
        DWORD   cbSize;
        RECT    rcMonitor;
        RECT    rcWork;
        DWORD   dwFlags;
    };

    typedef BOOL (WINAPI *InfoFunc)(HMONITOR, MONITORINFO*);
    typedef BOOL (QT_WIN_CALLBACK *EnumProc)(HMONITOR, HDC, LPRECT, LPARAM);
    typedef BOOL (WINAPI *EnumFunc)(HDC, LPCRECT, EnumProc, LPARAM);

    static EnumFunc enumDisplayMonitors;
    static InfoFunc getMonitorInfo;
    static int refcount;
};

int QDesktopWidgetPrivate::screenCount = 1;
int QDesktopWidgetPrivate::primaryScreen = 0;
QDesktopWidgetPrivate::EnumFunc QDesktopWidgetPrivate::enumDisplayMonitors = 0;
QDesktopWidgetPrivate::InfoFunc QDesktopWidgetPrivate::getMonitorInfo = 0;
QVector<QRect> *QDesktopWidgetPrivate::rects = 0;
QVector<QRect> *QDesktopWidgetPrivate::workrects = 0;
static int screen_number = 0;
int QDesktopWidgetPrivate::refcount = 0;
#ifdef Q_WS_WINCE_WM
// Use SIP information, if available
// SipGetInfo is not supported by SSDK (no definition!). 
static inline void qt_get_sip_info(QRect &rect)
{
    SIPINFO sip;
    memset(&sip, 0, sizeof(SIPINFO));
    sip.cbSize = sizeof(SIPINFO);
    if (SipGetInfo(&sip))
        rect = QRect(QPoint(sip.rcVisibleDesktop.left, sip.rcVisibleDesktop.top),
        QPoint(sip.rcVisibleDesktop.right - 1, sip.rcVisibleDesktop.bottom - 1));
}
#endif


BOOL QT_WIN_CALLBACK enumCallback(HMONITOR hMonitor, HDC, LPRECT, LPARAM)
{
    QDesktopWidgetPrivate::screenCount++;
    QDesktopWidgetPrivate::rects->resize(QDesktopWidgetPrivate::screenCount);
    QDesktopWidgetPrivate::workrects->resize(QDesktopWidgetPrivate::screenCount);
    // Get the MONITORINFO block
    QDesktopWidgetPrivate::MONITORINFO info;
    memset(&info, 0, sizeof(QDesktopWidgetPrivate::MONITORINFO));
    info.cbSize = sizeof(QDesktopWidgetPrivate::MONITORINFO);
    BOOL res = QDesktopWidgetPrivate::getMonitorInfo(hMonitor, &info);
    if (!res) {
        (*QDesktopWidgetPrivate::rects)[screen_number] = QRect();
        (*QDesktopWidgetPrivate::workrects)[screen_number] = QRect();
        return true;
    }

    // Fill list of rects
    RECT r = info.rcMonitor;
    QRect qr(QPoint(r.left, r.top), QPoint(r.right - 1, r.bottom - 1));
    (*QDesktopWidgetPrivate::rects)[screen_number] = qr;

    r = info.rcWork;
    qr = QRect(QPoint(r.left, r.top), QPoint(r.right - 1, r.bottom - 1));
    (*QDesktopWidgetPrivate::workrects)[screen_number] = qr;

    if (info.dwFlags & 0x00000001) //MONITORINFOF_PRIMARY
        QDesktopWidgetPrivate::primaryScreen = screen_number;

    ++screen_number;
    // Stop the enumeration if we have them all
    return true;
}

QDesktopWidgetPrivate::QDesktopWidgetPrivate()
{
    ++refcount;
}

void QDesktopWidgetPrivate::init(QDesktopWidget *that)
{
    if (rects)
        return;

    rects = new QVector<QRect>();
    workrects = new QVector<QRect>();
    screenCount = 0;

#ifndef Q_OS_WINCE
    QSystemLibrary user32Lib(QLatin1String("user32"));
    if (user32Lib.load()) {
        enumDisplayMonitors = (EnumFunc)user32Lib.resolve("EnumDisplayMonitors");
        getMonitorInfo = (InfoFunc)user32Lib.resolve("GetMonitorInfoW");
    }

    if (!enumDisplayMonitors || !getMonitorInfo) {
        screenCount = GetSystemMetrics(80);  // SM_CMONITORS
        rects->resize(screenCount);
        for (int i = 0; i < screenCount; ++i)
            rects->replace(i, that->rect());
        return;
    }
    // Calls enumCallback
    enumDisplayMonitors(0, 0, enumCallback, 0);
    enumDisplayMonitors = 0;
    getMonitorInfo = 0;
#else
    QSystemLibrary coreLib(QLatin1String("coredll"));
    if (coreLib.load()) {
        // CE >= 4.0 case
        enumDisplayMonitors = (EnumFunc)coreLib.resolve("EnumDisplayMonitors");
        getMonitorInfo = (InfoFunc)coreLib.resolve("GetMonitorInfo");
    }

    if ((!enumDisplayMonitors || !getMonitorInfo)) {
        screenCount = GetSystemMetrics(SM_CMONITORS);
        return;
    }

    if (!coreLib.isLoaded() || !enumDisplayMonitors || !getMonitorInfo) {
        rects->resize(screenCount);
        for (int i = 0; i < screenCount; ++i)
            (*rects)[i] = that->rect();

        RECT r;
        SystemParametersInfo(SPI_GETWORKAREA, 0, &r, 0);
        QRect qr = QRect(QPoint(r.left, r.top), QPoint(r.right - 1, r.bottom - 1));

#if defined(Q_WS_WINCE_WM)
        qt_get_sip_info(qr);
#endif

        workrects->resize(screenCount);
        for (int j = 0; j < screenCount; ++j)
            (*workrects)[j] = qr;
        return;
    }

    // Calls enumCallback
    enumDisplayMonitors(0, 0, enumCallback, 0);
    enumDisplayMonitors = 0;
    getMonitorInfo = 0;
#endif // Q_WS_WINCE
}

QDesktopWidgetPrivate::~QDesktopWidgetPrivate()
{
    if (!--refcount)
        cleanup();
}

void QDesktopWidgetPrivate::cleanup()
{
    screen_number = 0;
    screenCount = 1;
    primaryScreen = 0;
    enumDisplayMonitors = 0;
    getMonitorInfo = 0;
    delete rects;
    rects = 0;
    delete workrects;
    workrects = 0;
}

/*
    \omit
    Function is commented out in header
    \fn void *QDesktopWidget::handle(int screen) const

    Returns the window system handle of the display device with the
    index \a screen, for low-level access.  Using this function is not
    portable.

    The return type varies with platform; see qwindowdefs.h for details.

    \sa x11Display(), QPaintDevice::handle()
    \endomit
*/

QDesktopWidget::QDesktopWidget()
    : QWidget(*new QDesktopWidgetPrivate, 0, Qt::Desktop)
{
    setObjectName(QLatin1String("desktop"));
    QDesktopWidgetPrivate::init(this);
}

QDesktopWidget::~QDesktopWidget()
{
}

bool QDesktopWidget::isVirtualDesktop() const
{
    return true;
}

int QDesktopWidget::primaryScreen() const
{
    return d_func()->primaryScreen;
}

int QDesktopWidget::numScreens() const
{
    return d_func()->screenCount;
}

QWidget *QDesktopWidget::screen(int /* screen */)
{
    // It seems that a Qt::WType_Desktop cannot be moved?
    return this;
}

//
// MSVC 7.10 warns that d (the result of the expanded Q_D macro) as a local variable that is not referenced.
// Therefore, we ignore that warning with the following pragmas
// I've also tried to eliminate the macro, but to no use...
// We pop it further down
#ifdef Q_CC_MSVC
# pragma warning(push)
# pragma warning(disable : 4189)
#endif
const QRect QDesktopWidget::availableGeometry(int screen) const
{
    Q_D(const QDesktopWidget);
#ifdef Q_WS_WINCE_WM
    for(int i=0; i < d->workrects->size(); ++i)
        qt_get_sip_info((*d->workrects)[i]);
#endif
    if (screen < 0 || screen >= d->screenCount)
        screen = d->primaryScreen;

    return d->workrects->at(screen);
}

const QRect QDesktopWidget::screenGeometry(int screen) const
{
    const QDesktopWidgetPrivate *d = d_func();
    if (screen < 0 || screen >= d->screenCount)
        screen = d->primaryScreen;

    return d->rects->at(screen);
}

int QDesktopWidget::screenNumber(const QWidget *widget) const
{
    Q_D(const QDesktopWidget);
    if (!widget)
        return d->primaryScreen;

    QRect frame = widget->frameGeometry();
    if (!widget->isWindow())
        frame.moveTopLeft(widget->mapToGlobal(QPoint(0,0)));

    int maxSize = -1;
    int maxScreen = -1;

    for (int i = 0; i < d->screenCount; ++i) {
        QRect sect = d->rects->at(i).intersected(frame);
        int size = sect.width() * sect.height();
        if (size > maxSize && sect.width() > 0 && sect.height() > 0) {
            maxSize = size;
            maxScreen = i;
        }
    }

    return maxScreen;
}

int QDesktopWidget::screenNumber(const QPoint &point) const
{
    Q_D(const QDesktopWidget);

    int closestScreen = -1;
    int shortestDistance = INT_MAX;

    for (int i = 0; i < d->screenCount; ++i) {
        int thisDistance = d->pointToRect(point, d->rects->at(i));
        if (thisDistance < shortestDistance) {
            shortestDistance = thisDistance;
            closestScreen = i;
        }
    }

    return closestScreen;
}

void QDesktopWidget::resizeEvent(QResizeEvent *)
{
    Q_D(QDesktopWidget);
    const QVector<QRect> oldrects(*d->rects);
    const QVector<QRect> oldworkrects(*d->workrects);
    int oldscreencount = d->screenCount;

    QDesktopWidgetPrivate::cleanup();
    QDesktopWidgetPrivate::init(this);
#ifdef Q_WS_WINCE_WM
    for(int i=0; i < d->workrects->size(); ++i)
        qt_get_sip_info((*d->workrects)[i]);
#endif

    for (int i = 0; i < qMin(oldscreencount, d->screenCount); ++i) {
        const QRect oldrect = oldrects[i];
        const QRect newrect = d->rects->at(i);
        if (oldrect != newrect)
            emit resized(i);
    }

    for (int j = 0; j < qMin(oldscreencount, d->screenCount); ++j) {
        const QRect oldrect = oldworkrects[j];
        const QRect newrect = d->workrects->at(j);
        if (oldrect != newrect)
            emit workAreaResized(j);
    }

    if (oldscreencount != d->screenCount) {
        emit screenCountChanged(d->screenCount);
    }
}

#ifdef Q_CC_MSVC
# pragma warning(pop)
#endif

QT_END_NAMESPACE