src/frontends/qt3/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 "frontends/LyXView.h"
  14 #include "BufferView.h"
  15
  16 #include "QWorkArea.h"
  17
  18 #include "lcolorcache.h"
  19 #include "qt_helpers.h"
  20
  21 #include "debug.h"
  22 #include "funcrequest.h"
  23 #include "LColor.h"
  24 #include "support/os.h"
  25 #include "frontends/Gui.h"
  26 #include "frontends/Selection.h"
  27
  28 #include <qapplication.h>
  29 #include <qclipboard.h>
  30 #include <qdragobject.h>
  31 #include <qlayout.h>
  32 #include <qmainwindow.h>
  33 #include <qpainter.h>
  34
  35 #ifdef Q_WS_X11
  36 #include <X11/Xlib.h>
  37 #endif
  38
  39 #ifdef Q_WS_MACX
  40 #include <Carbon/Carbon.h>
  41 #endif
  42
  43 using std::endl;
  44 using std::string;
  45
  46 namespace os = lyx::support::os;
  47
  48 namespace {
  49 lyx::frontend::QWorkArea * wa_ptr = 0;
  50 }
  51
  52 namespace lyx {
  53 namespace frontend {
  54
  55 QWorkArea::QWorkArea(LyXView & owner, int, int)
  56         : QWidget(qApp->mainWidget()), owner_(owner), painter_(*this)
  57 {
  58         scrollbar_ = new QScrollBar(QScrollBar::Vertical, this);
  59         content_ = new QContentPane(this);
  60
  61         (static_cast<QMainWindow*>(qApp->mainWidget()))->setCentralWidget(this);
  62
  63         setFocusProxy(content_);
  64         setAcceptDrops(true);
  65
  66         content_->show();
  67
  68         // It is said that this helps reduce flicker
  69         content_->setBackgroundMode(NoBackground);
  70
  71         QHBoxLayout * vl = new QHBoxLayout(this);
  72         vl->addWidget(content_, 5);
  73         vl->addWidget(scrollbar_, 0);
  74
  75 #ifdef Q_WS_MACX
  76         wa_ptr = this;
  77 #endif
  78         show();
  79 }
  80
  81
  82 QWorkArea::~QWorkArea()
  83 {
  84 }
  85
  86
  87 void QWorkArea::setScrollbarParams(int h, int pos, int line_h)
  88 {
  89         scrollbar_->setTracking(false);
  90         // do what cursor movement does (some grey)
  91         h += height() / 4;
  92
  93         int max = std::max(0, h - height());
  94
  95         scrollbar_->setRange(0, max);
  96         content_->trackScrollbar(false);
  97         scrollbar_->setValue(pos);
  98         content_->trackScrollbar(true);
  99         scrollbar_->setLineStep(line_h);
 100         scrollbar_->setPageStep(height());
 101
 102         scrollbar_->setTracking(true);
 103 }
 104
 105 } // namespace frontend
 106 } // namespace lyx
 107
 108
 109 #ifdef Q_WS_X11
 110 bool lyxX11EventFilter(XEvent * xev)
 111 {
 112         switch (xev->type) {
 113         case SelectionRequest:
 114                 lyxerr[Debug::GUI] << "X requested selection." << endl;
 115                 if (wa_ptr) {
 116                         lyx::docstring const sel = wa_ptr->view().view()->requestSelection();
 117                         if (!sel.empty())
 118                                 wa_ptr->view().gui().selection().put(sel);
 119                 }
 120                 break;
 121         case SelectionClear:
 122                 lyxerr[Debug::GUI] << "Lost selection." << endl;
 123                 if (wa_ptr)
 124                         wa_ptr->view().view()->clearSelection();
 125                 break;
 126         }
 127         return false;
 128 }
 129 #endif
 130
 131 #ifdef Q_WS_MACX
 132 namespace{
 133 OSErr checkAppleEventForMissingParams(const AppleEvent& theAppleEvent)
 134  {
 135         DescType returnedType;
 136         Size actualSize;
 137         OSErr err = AEGetAttributePtr(&theAppleEvent, keyMissedKeywordAttr,
 138                                       typeWildCard, &returnedType, nil, 0,
 139                                       &actualSize);
 140         switch (err) {
 141         case errAEDescNotFound:
 142                 return noErr;
 143         case noErr:
 144                 return errAEEventNotHandled;
 145         default:
 146                 return err;
 147         }
 148  }
 149 }
 150
 151 pascal OSErr handleOpenDocuments(const AppleEvent* inEvent,
 152                                  AppleEvent* /*reply*/, long /*refCon*/)
 153 {
 154         QString s_arg;
 155         AEDescList documentList;
 156         OSErr err = AEGetParamDesc(inEvent, keyDirectObject, typeAEList,
 157                                    &documentList);
 158         if (err != noErr)
 159                 return err;
 160
 161         err = checkAppleEventForMissingParams(*inEvent);
 162         if (err == noErr) {
 163                 long documentCount;
 164                 err = AECountItems(&documentList, &documentCount);
 165                 for (long documentIndex = 1;
 166                      err == noErr && documentIndex <= documentCount;
 167                      documentIndex++) {
 168                         DescType returnedType;
 169                         Size actualSize;
 170                         AEKeyword keyword;
 171                         FSRef ref;
 172                         char qstr_buf[1024];
 173                         err = AESizeOfNthItem(&documentList, documentIndex,
 174                                               &returnedType, &actualSize);
 175                         if (err == noErr) {
 176                                 err = AEGetNthPtr(&documentList, documentIndex,
 177                                                   typeFSRef, &keyword,
 178                                                   &returnedType, (Ptr)&ref,
 179                                                   sizeof(FSRef), &actualSize);
 180                                 if (err == noErr) {
 181                                         FSRefMakePath(&ref, (UInt8*)qstr_buf,
 182                                                       1024);
 183                                         s_arg=QString::fromUtf8(qstr_buf);
 184                                         wa_ptr->view().view()->workAreaDispatch(
 185                                                 FuncRequest(LFUN_FILE_OPEN,
 186                                                             fromqstr(s_arg)));
 187                                         break;
 188                                 }
 189                         }
 190                 } // for ...
 191         }
 192         AEDisposeDesc(&documentList);
 193         return err;
 194 }
 195 #endif  // Q_WS_MACX
 196
 197
 198 namespace lyx {
 199 namespace frontend {
 200
 201 void QWorkArea::haveSelection(bool own)
 202 {
 203         wa_ptr = const_cast<QWorkArea*>(this);
 204
 205         if (!QApplication::clipboard()->supportsSelection())
 206                 return;
 207
 208         if (own) {
 209                 QApplication::clipboard()->setSelectionMode(true);
 210                 QApplication::clipboard()->setText(QString());
 211         }
 212         // We don't need to do anything if own = false, as this case is
 213         // handled by QT.
 214 }
 215
 216
 217 void QWorkArea::dragEnterEvent(QDragEnterEvent * event)
 218 {
 219         event->accept(QUriDrag::canDecode(event));
 220 }
 221
 222
 223 void QWorkArea::dropEvent(QDropEvent * event)
 224 {
 225         QStringList files;
 226
 227         if (QUriDrag::decodeLocalFiles(event, files)) {
 228                 lyxerr[Debug::GUI] << "QWorkArea::dropEvent: got URIs!"
 229                                    << endl;
 230                 for (QStringList::Iterator i = files.begin();
 231                      i != files.end(); ++i) {
 232                         string const file = os::internal_path(fromqstr(*i));
 233                         view().view()->workAreaDispatch(FuncRequest(LFUN_FILE_OPEN, file));
 234                 }
 235         }
 236 }
 237
 238 } // namespace frontend
 239 } // namespace lyx