src/frontends/qt2/QWorkArea.C

   1 /**
   2  * \file QWorkArea.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author John Levon
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "QWorkArea.h"
  14
  15 #include "lcolorcache.h"
  16 #include "qt_helpers.h"
  17
  18 #include "debug.h"
  19 #include "funcrequest.h"
  20 #include "LColor.h"
  21
  22 #include <qapplication.h>
  23 #include <qclipboard.h>
  24 #include <qdragobject.h>
  25 #include <qlayout.h>
  26 #include <qmainwindow.h>
  27 #include <qpainter.h>
  28
  29 #ifdef Q_WS_X11
  30 #include <X11/Xlib.h>
  31 #endif
  32
  33 #ifdef Q_WS_MACX
  34 #include <Carbon/Carbon.h>
  35 #endif
  36
  37 using std::endl;
  38 using std::string;
  39
  40 namespace {
  41 QWorkArea const * wa_ptr = 0;
  42 }
  43
  44 QWorkArea::QWorkArea(LyXView &, int, int)
  45         : WorkArea(), QWidget(qApp->mainWidget()), painter_(*this)
  46 {
  47         scrollbar_ = new QScrollBar(QScrollBar::Vertical, this);
  48         content_ = new QContentPane(this);
  49
  50         (static_cast<QMainWindow*>(qApp->mainWidget()))->setCentralWidget(this);
  51
  52         setFocusProxy(content_);
  53         setAcceptDrops(true);
  54
  55         content_->show();
  56
  57         content_->setBackgroundColor(lcolorcache.get(LColor::background));
  58
  59         QHBoxLayout * vl = new QHBoxLayout(this);
  60         vl->addWidget(content_, 5);
  61         vl->addWidget(scrollbar_, 0);
  62
  63 #ifdef Q_WS_MACX
  64         wa_ptr = this;
  65 #endif
  66         show();
  67 }
  68
  69
  70 QWorkArea::~QWorkArea()
  71 {
  72 }
  73
  74
  75 void QWorkArea::setScrollbarParams(int h, int pos, int line_h)
  76 {
  77         // do what cursor movement does (some grey)
  78         h += height() / 4;
  79
  80         int max = std::max(0, h - height());
  81
  82         scrollbar_->setRange(0, max);
  83         content_->trackScrollbar(false);
  84         scrollbar_->setValue(pos);
  85         content_->trackScrollbar(true);
  86         scrollbar_->setLineStep(line_h);
  87         scrollbar_->setPageStep(height());
  88 }
  89
  90 #ifdef Q_WS_X11
  91 bool lyxX11EventFilter(XEvent * xev)
  92 {
  93         switch (xev->type) {
  94         case SelectionRequest:
  95                 lyxerr[Debug::GUI] << "X requested selection." << endl;
  96                 if (wa_ptr)
  97                         wa_ptr->selectionRequested();
  98                 break;
  99         case SelectionClear:
 100                 lyxerr[Debug::GUI] << "Lost selection." << endl;
 101                 if (wa_ptr)
 102                         wa_ptr->selectionLost();
 103                 break;
 104         }
 105         return false;
 106 }
 107 #endif
 108
 109 #ifdef Q_WS_MACX
 110 namespace{
 111 OSErr checkAppleEventForMissingParams(const AppleEvent& theAppleEvent)
 112  {
 113         DescType returnedType;
 114         Size actualSize;
 115         OSErr err = AEGetAttributePtr(&theAppleEvent, keyMissedKeywordAttr,
 116                                       typeWildCard, &returnedType, nil, 0,
 117                                       &actualSize);
 118         switch (err) {
 119         case errAEDescNotFound:
 120                 return noErr;
 121         case noErr:
 122                 return errAEEventNotHandled;
 123         default:
 124                 return err;
 125         }
 126  }
 127 }
 128
 129 pascal OSErr handleOpenDocuments(const AppleEvent* inEvent,
 130                                  AppleEvent* /*reply*/, long /*refCon*/)
 131 {
 132         QString s_arg;
 133         AEDescList documentList;
 134         OSErr err = AEGetParamDesc(inEvent, keyDirectObject, typeAEList,
 135                                    &documentList);
 136         if (err != noErr)
 137                 return err;
 138
 139         err = checkAppleEventForMissingParams(*inEvent);
 140         if (err == noErr) {
 141                 long documentCount;
 142                 err = AECountItems(&documentList, &documentCount);
 143                 for (long documentIndex = 1;
 144                      err == noErr && documentIndex <= documentCount;
 145                      documentIndex++) {
 146                         DescType returnedType;
 147                         Size actualSize;
 148                         AEKeyword keyword;
 149                         FSRef ref;
 150                         char qstr_buf[1024];
 151                         err = AESizeOfNthItem(&documentList, documentIndex,
 152                                               &returnedType, &actualSize);
 153                         if (err == noErr) {
 154                                 err = AEGetNthPtr(&documentList, documentIndex,
 155                                                   typeFSRef, &keyword,
 156                                                   &returnedType, (Ptr)&ref,
 157                                                   sizeof(FSRef), &actualSize);
 158                                 if (err == noErr) {
 159                                         FSRefMakePath(&ref, (UInt8*)qstr_buf,
 160                                                       1024);
 161                                         s_arg=QString::fromUtf8(qstr_buf);
 162                                         wa_ptr->dispatch(
 163                                                 FuncRequest(LFUN_FILE_OPEN,
 164                                                             fromqstr(s_arg)));
 165                                         break;
 166                                 }
 167                         }
 168                 } // for ...
 169         }
 170         AEDisposeDesc(&documentList);
 171         return err;
 172 }
 173 #endif  // Q_WS_MACX
 174
 175 void QWorkArea::haveSelection(bool own) const
 176 {
 177         wa_ptr = this;
 178
 179 #if QT_VERSION >= 300
 180         if (!QApplication::clipboard()->supportsSelection())
 181                 return;
 182
 183         if (own) {
 184                 QApplication::clipboard()->setSelectionMode(true);
 185                 QApplication::clipboard()->setText(QString());
 186         }
 187         // We don't need to do anything if own = false, as this case is
 188         // handled by QT.
 189 #endif
 190 }
 191
 192
 193 string const QWorkArea::getClipboard() const
 194 {
 195 #if QT_VERSION >= 300
 196         QApplication::clipboard()->setSelectionMode(true);
 197 #endif
 198         QString str = QApplication::clipboard()->text();
 199         if (str.isNull())
 200                 return string();
 201         return fromqstr(str);
 202 }
 203
 204
 205 void QWorkArea::putClipboard(string const & str) const
 206 {
 207 #if QT_VERSION >= 300
 208         QApplication::clipboard()->setSelectionMode(true);
 209 #endif
 210         QApplication::clipboard()->setText(toqstr(str));
 211 }
 212
 213
 214 void QWorkArea::dragEnterEvent(QDragEnterEvent * event)
 215 {
 216         event->accept(QUriDrag::canDecode(event));
 217 }
 218
 219
 220 void QWorkArea::dropEvent(QDropEvent* event)
 221 {
 222         QStringList files;
 223
 224         if (QUriDrag::decodeLocalFiles(event, files)) {
 225                 lyxerr[Debug::GUI] << "QWorkArea::dropEvent: got URIs!"
 226                                    << endl;
 227                 for (QStringList::Iterator i = files.begin();
 228                      i!=files.end(); ++i)
 229                         dispatch(FuncRequest(LFUN_FILE_OPEN, fromqstr(*i)));
 230         }
 231 }