src/frontends/qt4/GuiAlert.cpp

   1 /**
   2  * \file qt4/GuiAlert.cpp
   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  * \author Jürgen Spitzmüller
   8  * \author Abdelrazak Younes
   9  *
  10  * Full author contact details are available in file CREDITS.
  11  */
  12
  13 #include <config.h>
  14
  15 #include "alert.h"
  16 #include "InGuiThread.h"
  17
  18 #include "frontends/Application.h"
  19
  20 #include "qt_helpers.h"
  21 #include "LyX.h" // for lyx::use_gui
  22
  23 #include "support/gettext.h"
  24 #include "support/debug.h"
  25 #include "support/docstring.h"
  26 #include "support/lstrings.h"
  27 #include "support/lassert.h"
  28 #include "support/ProgressInterface.h"
  29
  30 #include <QApplication>
  31 #include <QCheckBox>
  32 #include <QMessageBox>
  33 #include <QLineEdit>
  34 #include <QInputDialog>
  35 #include <QPushButton>
  36 #include <QSettings>
  37
  38 #include <iomanip>
  39 #include <iostream>
  40
  41
  42 // sync with GuiView.cpp
  43 #define EXPORT_in_THREAD 1
  44
  45
  46 using namespace std;
  47 using namespace lyx::support;
  48
  49 namespace lyx {
  50 namespace frontend {
  51
  52
  53 void noAppDialog(QString const & title, QString const & msg, QMessageBox::Icon mode)
  54 {
  55         int argc = 1;
  56         const char *argv[] = { "lyx", 0 };
  57
  58         QApplication app(argc, (char**)argv);
  59         switch (mode)
  60         {
  61                 case QMessageBox::Information: QMessageBox::information(0, title, msg); break;
  62                 case QMessageBox::Warning: QMessageBox::warning(0, title, msg); break;
  63                 case QMessageBox::Critical: QMessageBox::critical(0, title, msg); break;
  64                 default: break;
  65         }
  66 }
  67
  68
  69 namespace Alert {
  70
  71
  72 docstring toPlainText(docstring const & msg)
  73 {
  74         return qstring_to_ucs4(qtHtmlToPlainText(toqstr(msg)));
  75 }
  76
  77
  78 int doPrompt(docstring const & title0, docstring const & question,
  79                   int default_button, int cancel_button,
  80                   docstring const & b1, docstring const & b2,
  81                   docstring const & b3, docstring const & b4)
  82 {
  83         //lyxerr << "PROMPT" << title0 << "FOCUS: " << qApp->focusWidget() << endl;
  84         if (!use_gui || lyxerr.debugging()) {
  85                 lyxerr << toPlainText(title0) << '\n'
  86                        << "----------------------------------------\n"
  87                        << toPlainText(question) << endl;
  88
  89                 lyxerr << "Assuming answer is ";
  90                 switch (default_button) {
  91                 case 0: lyxerr << b1 << endl; break;
  92                 case 1: lyxerr << b2 << endl; break;
  93                 case 2: lyxerr << b3 << endl; break;
  94                 case 3: lyxerr << b4 << endl;
  95                 }
  96                 if (!use_gui)
  97                         return default_button;
  98         }
  99
 100         docstring const title = bformat(_("LyX: %1$s"), title0);
 101
 102         /// Long operation in progress prevents user from Ok-ing the error dialog
 103         bool long_op = theApp()->longOperationStarted();
 104         if (long_op)
 105                 theApp()->stopLongOperation();
 106
 107         // For some reason, sometimes Qt uses a hourglass or watch cursor when
 108         // displaying the alert. Hence, we ask for the standard cursor shape.
 109         qApp->setOverrideCursor(Qt::ArrowCursor);
 110
 111         // FIXME replace that with guiApp->currentView()
 112         //LYXERR0("FOCUS: " << qApp->focusWidget());
 113         QPushButton * b[4] = { 0, 0, 0, 0 };
 114         QMessageBox msg_box(QMessageBox::Information,
 115                         toqstr(title), toqstr(question),
 116                         QMessageBox::NoButton, qApp->focusWidget());
 117         b[0] = msg_box.addButton(b1.empty() ? "OK" : toqstr(b1),
 118                                         QMessageBox::ActionRole);
 119         if (!b2.empty())
 120                 b[1] = msg_box.addButton(toqstr(b2), QMessageBox::ActionRole);
 121         if (!b3.empty())
 122                 b[2] = msg_box.addButton(toqstr(b3), QMessageBox::ActionRole);
 123         if (!b4.empty())
 124                 b[3] = msg_box.addButton(toqstr(b4), QMessageBox::ActionRole);
 125         msg_box.setDefaultButton(b[default_button]);
 126         msg_box.setEscapeButton(static_cast<QAbstractButton *>(b[cancel_button]));
 127         int res = msg_box.exec();
 128
 129         qApp->restoreOverrideCursor();
 130
 131         if (long_op)
 132                 theApp()->startLongOperation();
 133
 134         // Qt bug: can return -1 on cancel or WM close, despite the docs.
 135         if (res == -1)
 136                 res = cancel_button;
 137         return res;
 138 }
 139
 140 int prompt(docstring const & title0, docstring const & question,
 141                   int default_button, int cancel_button,
 142                   docstring const & b1, docstring const & b2,
 143                   docstring const & b3, docstring const & b4)
 144 {
 145 #ifdef EXPORT_in_THREAD
 146         return InGuiThread<int>().call(&doPrompt,
 147 #else
 148         return doPrompt(
 149 #endif
 150                                 title0, question, default_button,
 151                                 cancel_button, b1, b2, b3, b4);
 152 }
 153
 154 void doWarning(docstring const & title0, docstring const & message,
 155              bool const & askshowagain)
 156 {
 157         lyxerr << "Warning: " << toPlainText(title0) << '\n'
 158                << "----------------------------------------\n"
 159                << toPlainText(message) << endl;
 160
 161         if (!use_gui)
 162                 return;
 163
 164         docstring const title = bformat(_("LyX: %1$s"), title0);
 165
 166         if (theApp() == 0) {
 167                 noAppDialog(toqstr(title), toqstr(message), QMessageBox::Warning);
 168                 return;
 169         }
 170
 171         /// Long operation in progress prevents user from Ok-ing the error dialog
 172         bool long_op = theApp()->longOperationStarted();
 173         if (long_op)
 174                 theApp()->stopLongOperation();
 175
 176         // Don't use a hourglass cursor while displaying the alert
 177         qApp->setOverrideCursor(Qt::ArrowCursor);
 178
 179         if (!askshowagain) {
 180                 ProgressInterface::instance()->warning(
 181                                 toqstr(title),
 182                                 toqstr(message));
 183         } else {
 184                 ProgressInterface::instance()->toggleWarning(
 185                                 toqstr(title),
 186                                 toqstr(message),
 187                                 toqstr(message));
 188         }
 189
 190         qApp->restoreOverrideCursor();
 191
 192         if (long_op)
 193                 theApp()->startLongOperation();
 194 }
 195
 196 void warning(docstring const & title0, docstring const & message,
 197              bool const & askshowagain)
 198 {
 199 #ifdef EXPORT_in_THREAD
 200         InGuiThread<void>().call(&doWarning,
 201 #else
 202         doWarning(
 203 #endif
 204                                 title0, message, askshowagain);
 205 }
 206
 207 void doError(docstring const & title0, docstring const & message, bool backtrace)
 208 {
 209         lyxerr << "Error: " << toPlainText(title0) << '\n'
 210                << "----------------------------------------\n"
 211                << toPlainText(message) << endl;
 212
 213         QString details;
 214         if (backtrace)
 215                 details = toqstr(printCallStack());
 216
 217         if (!use_gui)
 218                 return;
 219
 220         docstring const title = bformat(_("LyX: %1$s"), title0);
 221
 222         if (theApp() == 0) {
 223                 noAppDialog(toqstr(title), toqstr(message), QMessageBox::Critical);
 224                 return;
 225         }
 226
 227         /// Long operation in progress prevents user from Ok-ing the error dialog
 228         bool long_op = theApp()->longOperationStarted();
 229         if (long_op)
 230                 theApp()->stopLongOperation();
 231
 232         // Don't use a hourglass cursor while displaying the alert
 233         qApp->setOverrideCursor(Qt::ArrowCursor);
 234
 235         ProgressInterface::instance()->error(
 236                 toqstr(title),
 237                 toqstr(message),
 238                 details);
 239
 240         qApp->restoreOverrideCursor();
 241
 242         if (long_op)
 243                 theApp()->startLongOperation();
 244 }
 245
 246 void error(docstring const & title0, docstring const & message, bool backtrace)
 247 {
 248 #ifdef EXPORT_in_THREAD
 249         InGuiThread<void>().call(&doError,
 250 #else
 251         doError(
 252 #endif
 253                                 title0, message, backtrace);
 254 }
 255
 256 void doInformation(docstring const & title0, docstring const & message)
 257 {
 258         if (!use_gui || lyxerr.debugging())
 259                 lyxerr << toPlainText(title0) << '\n'
 260                        << "----------------------------------------\n"
 261                        << toPlainText(message) << endl;
 262
 263         if (!use_gui)
 264                 return;
 265
 266         docstring const title = bformat(_("LyX: %1$s"), title0);
 267
 268         if (theApp() == 0) {
 269                 noAppDialog(toqstr(title), toqstr(message), QMessageBox::Information);
 270                 return;
 271         }
 272
 273         /// Long operation in progress prevents user from Ok-ing the error dialog
 274         bool long_op = theApp()->longOperationStarted();
 275         if (long_op)
 276                 theApp()->stopLongOperation();
 277
 278         // Don't use a hourglass cursor while displaying the alert
 279         qApp->setOverrideCursor(Qt::ArrowCursor);
 280
 281         ProgressInterface::instance()->information(
 282                 toqstr(title),
 283                 toqstr(message));
 284
 285         qApp->restoreOverrideCursor();
 286
 287         if (long_op)
 288                 theApp()->startLongOperation();
 289 }
 290
 291 void information(docstring const & title0, docstring const & message)
 292 {
 293 #ifdef EXPORT_in_THREAD
 294         InGuiThread<void>().call(&doInformation,
 295 #else
 296         doInformation(
 297 #endif
 298                                 title0, message);
 299 }
 300
 301 bool doAskForText(docstring & response, docstring const & msg,
 302         docstring const & dflt)
 303 {
 304         if (!use_gui || lyxerr.debugging()) {
 305                 lyxerr << "----------------------------------------\n"
 306                        << toPlainText(msg) << '\n'
 307                        << "Assuming answer is " << dflt << '\n'
 308                        << "----------------------------------------" << endl;
 309                 if (!use_gui) {
 310                         response = dflt;
 311                         return true;
 312                 }
 313         }
 314
 315         docstring const title = bformat(_("LyX: %1$s"), msg);
 316
 317         /// Long operation in progress prevents user from Ok-ing the error dialog
 318         bool long_op = theApp()->longOperationStarted();
 319         if (long_op)
 320                 theApp()->stopLongOperation();
 321
 322         bool ok;
 323         QString text = QInputDialog::getText(qApp->focusWidget(),
 324                 toqstr(title),
 325                 toqstr(char_type('&') + msg),
 326                 QLineEdit::Normal,
 327                 toqstr(dflt), &ok);
 328
 329         if (long_op)
 330                 theApp()->startLongOperation();
 331
 332         if (ok) {
 333                 response = qstring_to_ucs4(text);
 334                 return true;
 335         }
 336         response.clear();
 337         return false;
 338 }
 339
 340 bool askForText(docstring & response, docstring const & msg,
 341         docstring const & dflt)
 342 {
 343 #ifdef EXPORT_in_THREAD
 344         return InGuiThread<bool>().call(&doAskForText,
 345 #else
 346         return doAskForText(
 347 #endif
 348                                 response, msg, dflt);
 349 }
 350
 351 } // namespace Alert
 352 } // namespace frontend
 353 } // namespace lyx