src/frontends/qt/GuiAlert.cpp

   1 /**
   2  * \file qt/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 & title, 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" << title << "FOCUS: " << qApp->focusWidget() << endl;
  84         if (!use_gui || lyxerr.debugging()) {
  85                 lyxerr << toPlainText(title) << '\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         /// Long operation in progress prevents user from Ok-ing the error dialog
 101         bool long_op = theApp()->longOperationStarted();
 102         if (long_op)
 103                 theApp()->stopLongOperation();
 104
 105         // For some reason, sometimes Qt uses a hourglass or watch cursor when
 106         // displaying the alert. Hence, we ask for the standard cursor shape.
 107         qApp->setOverrideCursor(Qt::ArrowCursor);
 108
 109         // FIXME replace that with guiApp->currentView()
 110         //LYXERR0("FOCUS: " << qApp->focusWidget());
 111         QPushButton * b[4] = { 0, 0, 0, 0 };
 112         QMessageBox msg_box(QMessageBox::Information,
 113                         toqstr(title), toqstr(question),
 114                         QMessageBox::NoButton, qApp->focusWidget());
 115         b[0] = msg_box.addButton(b1.empty() ? "OK" : toqstr(b1),
 116                                         QMessageBox::ActionRole);
 117         if (!b2.empty())
 118                 b[1] = msg_box.addButton(toqstr(b2), QMessageBox::ActionRole);
 119         if (!b3.empty())
 120                 b[2] = msg_box.addButton(toqstr(b3), QMessageBox::ActionRole);
 121         if (!b4.empty())
 122                 b[3] = msg_box.addButton(toqstr(b4), QMessageBox::ActionRole);
 123         msg_box.setDefaultButton(b[default_button]);
 124         msg_box.setEscapeButton(static_cast<QAbstractButton *>(b[cancel_button]));
 125         int res = msg_box.exec();
 126
 127         qApp->restoreOverrideCursor();
 128
 129         if (long_op)
 130                 theApp()->startLongOperation();
 131
 132         // Qt bug: can return -1 on cancel or WM close, despite the docs.
 133         if (res == -1)
 134                 res = cancel_button;
 135         return res;
 136 }
 137
 138 int prompt(docstring const & title, docstring const & question,
 139                   int default_button, int cancel_button,
 140                   docstring const & b0, docstring const & b1,
 141                   docstring const & b2, docstring const & b3)
 142 {
 143 #ifdef EXPORT_in_THREAD
 144         return InGuiThread<int>().call(&doPrompt,
 145 #else
 146         return doPrompt(
 147 #endif
 148                                 title, question, default_button,
 149                                 cancel_button, b0, b1, b2, b3);
 150 }
 151
 152 void doWarning(docstring const & title, docstring const & message,
 153              bool askshowagain)
 154 {
 155         lyxerr << "Warning: " << toPlainText(title) << '\n'
 156                << "----------------------------------------\n"
 157                << toPlainText(message) << endl;
 158
 159         if (!use_gui)
 160                 return;
 161
 162         if (theApp() == 0) {
 163                 noAppDialog(toqstr(title), toqstr(message), QMessageBox::Warning);
 164                 return;
 165         }
 166
 167         /// Long operation in progress prevents user from Ok-ing the error dialog
 168         bool long_op = theApp()->longOperationStarted();
 169         if (long_op)
 170                 theApp()->stopLongOperation();
 171
 172         // Don't use a hourglass cursor while displaying the alert
 173         qApp->setOverrideCursor(Qt::ArrowCursor);
 174
 175         if (!askshowagain) {
 176                 ProgressInterface::instance()->warning(
 177                                 toqstr(title),
 178                                 toqstr(message));
 179         } else {
 180                 ProgressInterface::instance()->toggleWarning(
 181                                 toqstr(title),
 182                                 toqstr(message),
 183                                 toqstr(message));
 184         }
 185
 186         qApp->restoreOverrideCursor();
 187
 188         if (long_op)
 189                 theApp()->startLongOperation();
 190 }
 191
 192 void warning(docstring const & title, docstring const & message,
 193              bool askshowagain)
 194 {
 195 #ifdef EXPORT_in_THREAD
 196         InGuiThread<void>().call(&doWarning,
 197 #else
 198         doWarning(
 199 #endif
 200                                 title, message, askshowagain);
 201 }
 202
 203 void doError(docstring const & title, docstring const & message, bool backtrace)
 204 {
 205         lyxerr << "Error: " << toPlainText(title) << '\n'
 206                << "----------------------------------------\n"
 207                << toPlainText(message) << endl;
 208
 209         QString details;
 210         if (backtrace)
 211                 details = toqstr(printCallStack());
 212
 213         if (!use_gui)
 214                 return;
 215
 216         if (theApp() == 0) {
 217                 noAppDialog(toqstr(title), toqstr(message), QMessageBox::Critical);
 218                 return;
 219         }
 220
 221         /// Long operation in progress prevents user from Ok-ing the error dialog
 222         bool long_op = theApp()->longOperationStarted();
 223         if (long_op)
 224                 theApp()->stopLongOperation();
 225
 226         // Don't use a hourglass cursor while displaying the alert
 227         qApp->setOverrideCursor(Qt::ArrowCursor);
 228
 229         ProgressInterface::instance()->error(
 230                 toqstr(title),
 231                 toqstr(message),
 232                 details);
 233
 234         qApp->restoreOverrideCursor();
 235
 236         if (long_op)
 237                 theApp()->startLongOperation();
 238 }
 239
 240 void error(docstring const & title, docstring const & message, bool backtrace)
 241 {
 242 #ifdef EXPORT_in_THREAD
 243         InGuiThread<void>().call(&doError,
 244 #else
 245         doError(
 246 #endif
 247                                 title, message, backtrace);
 248 }
 249
 250 void doInformation(docstring const & title, docstring const & message)
 251 {
 252         if (!use_gui || lyxerr.debugging())
 253                 lyxerr << toPlainText(title) << '\n'
 254                        << "----------------------------------------\n"
 255                        << toPlainText(message) << endl;
 256
 257         if (!use_gui)
 258                 return;
 259
 260         if (theApp() == 0) {
 261                 noAppDialog(toqstr(title), toqstr(message), QMessageBox::Information);
 262                 return;
 263         }
 264
 265         /// Long operation in progress prevents user from Ok-ing the error dialog
 266         bool long_op = theApp()->longOperationStarted();
 267         if (long_op)
 268                 theApp()->stopLongOperation();
 269
 270         // Don't use a hourglass cursor while displaying the alert
 271         qApp->setOverrideCursor(Qt::ArrowCursor);
 272
 273         ProgressInterface::instance()->information(
 274                 toqstr(title),
 275                 toqstr(message));
 276
 277         qApp->restoreOverrideCursor();
 278
 279         if (long_op)
 280                 theApp()->startLongOperation();
 281 }
 282
 283 void information(docstring const & title, docstring const & message)
 284 {
 285 #ifdef EXPORT_in_THREAD
 286         InGuiThread<void>().call(&doInformation,
 287 #else
 288         doInformation(
 289 #endif
 290                                 title, message);
 291 }
 292
 293 bool doAskForText(docstring & response, docstring const & msg,
 294         docstring const & dflt)
 295 {
 296         if (!use_gui || lyxerr.debugging()) {
 297                 lyxerr << "----------------------------------------\n"
 298                        << toPlainText(msg) << '\n'
 299                        << "Assuming answer is " << dflt << '\n'
 300                        << "----------------------------------------" << endl;
 301                 if (!use_gui) {
 302                         response = dflt;
 303                         return true;
 304                 }
 305         }
 306
 307         docstring const title = bformat(from_utf8("%1$s"), msg);
 308
 309         /// Long operation in progress prevents user from Ok-ing the error dialog
 310         bool long_op = theApp()->longOperationStarted();
 311         if (long_op)
 312                 theApp()->stopLongOperation();
 313
 314         bool ok;
 315         QString text = QInputDialog::getText(qApp->focusWidget(),
 316                 toqstr(title),
 317                 toqstr(char_type('&') + msg),
 318                 QLineEdit::Normal,
 319                 toqstr(dflt), &ok);
 320
 321         if (long_op)
 322                 theApp()->startLongOperation();
 323
 324         if (ok) {
 325                 response = qstring_to_ucs4(text);
 326                 return true;
 327         }
 328         response.clear();
 329         return false;
 330 }
 331
 332 bool askForText(docstring & response, docstring const & msg,
 333         docstring const & dflt)
 334 {
 335 #ifdef EXPORT_in_THREAD
 336         return InGuiThread<bool>().call(&doAskForText,
 337 #else
 338         return doAskForText(
 339 #endif
 340                                 response, msg, dflt);
 341 }
 342
 343 } // namespace Alert
 344 } // namespace frontend
 345 } // namespace lyx