src/frontends/qt4/TocWidget.C

   1 /**
   2  * \file TocWidget.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  * \author Abdelrazak Younes
   8  *
   9  * Full author contact details are available in file CREDITS.
  10  */
  11
  12 #include <config.h>
  13
  14 #include "TocWidget.h"
  15
  16 #include "QToc.h"
  17 #include "qt_helpers.h"
  18
  19 #include "debug.h"
  20
  21 #include <QHeaderView>
  22 #include <QPushButton>
  23 #include <QTreeWidgetItem>
  24
  25 #include <vector>
  26 #include <string>
  27 #include <stack>
  28
  29 using std::endl;
  30 using std::pair;
  31 using std::stack;
  32 using std::vector;
  33 using std::string;
  34
  35
  36 namespace lyx {
  37 namespace frontend {
  38
  39
  40 TocWidget::TocWidget(QToc * form, QWidget * parent)
  41         : QWidget(parent), form_(form), depth_(0)
  42 {
  43         setupUi(this);
  44
  45         connect(form, SIGNAL(modelReset()),
  46                 SLOT(updateGui()));
  47
  48         // avoid flickering
  49         tocTV->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
  50
  51         tocTV->showColumn(0);
  52
  53         // hide the pointless QHeader for now
  54         // in the future, new columns may appear
  55         // like labels, bookmarks, etc...
  56         // tocTV->header()->hide();
  57         tocTV->header()->setVisible(false);
  58 }
  59
  60
  61 void TocWidget::selectionChanged(const QModelIndex & current,
  62                                   const QModelIndex & /*previous*/)
  63 {
  64         lyxerr[Debug::GUI]
  65                 << "selectionChanged index " << current.row()
  66                 << ", " << current.column()
  67                 << endl;
  68
  69         form_->goTo(typeCO->currentIndex(), current);
  70 }
  71
  72
  73 void TocWidget::on_updatePB_clicked()
  74 {
  75         form_->updateBackend();
  76         form_->update();
  77         update();
  78 }
  79
  80 /* FIXME (Ugras 17/11/06):
  81 I have implemented a getIndexDepth function to get the model indices. In my
  82 opinion, somebody should derive a new qvariant class for tocModelItem
  83 which saves the string data and depth information. that will save the
  84 depth calculation.
  85 */
  86 int TocWidget::getIndexDepth(QModelIndex const & index, int depth)
  87 {
  88         ++depth;
  89         return (index.parent() == QModelIndex())? depth : getIndexDepth(index.parent(),depth);
  90 }
  91
  92
  93 void TocWidget::on_depthSL_valueChanged(int depth)
  94 {
  95         if (depth == depth_)
  96                 return;
  97         setTreeDepth(depth);
  98 }
  99
 100
 101 void TocWidget::setTreeDepth(int depth)
 102 {
 103         depth_ = depth;
 104
 105         // expanding and then collapsing is probably better,
 106         // but my qt 4.1.2 doesn't have expandAll()..
 107         //tocTV->expandAll();
 108         QModelIndexList indices = tocTV->model()->match(
 109                 tocTV->model()->index(0,0),
 110                 Qt::DisplayRole, "*", -1,
 111                 Qt::MatchWildcard|Qt::MatchRecursive);
 112
 113         int size = indices.size();
 114         for (int i = 0; i < size; i++) {
 115                 QModelIndex index = indices[i];
 116                 if (getIndexDepth(index) < depth_)
 117                         tocTV->expand(index);
 118                 else
 119                         tocTV->collapse(index);
 120         }
 121 }
 122
 123
 124 void TocWidget::on_typeCO_activated(int value)
 125 {
 126         setTocModel(value);
 127 }
 128
 129
 130 void TocWidget::on_moveUpPB_clicked()
 131 {
 132         enableButtons(false);
 133         QModelIndexList const & list = tocTV->selectionModel()->selectedIndexes();
 134         if (!list.isEmpty()) {
 135                 enableButtons(false);
 136                 form_->goTo(typeCO->currentIndex(), list[0]);
 137                 form_->outlineUp();
 138                 enableButtons(true);
 139         }
 140 }
 141
 142
 143 void TocWidget::on_moveDownPB_clicked()
 144 {
 145         enableButtons(false);
 146         QModelIndexList const & list = tocTV->selectionModel()->selectedIndexes();
 147         if (!list.isEmpty()) {
 148                 enableButtons(false);
 149                 form_->goTo(typeCO->currentIndex(), list[0]);
 150                 form_->outlineDown();
 151                 enableButtons(true);
 152         }
 153 }
 154
 155
 156 void TocWidget::on_moveInPB_clicked()
 157 {
 158         enableButtons(false);
 159         QModelIndexList const & list = tocTV->selectionModel()->selectedIndexes();
 160         if (!list.isEmpty()) {
 161                 enableButtons(false);
 162                 form_->goTo(typeCO->currentIndex(), list[0]);
 163                 form_->outlineIn();
 164                 enableButtons(true);
 165         }
 166 }
 167
 168
 169 void TocWidget::on_moveOutPB_clicked()
 170 {
 171         QModelIndexList const & list = tocTV->selectionModel()->selectedIndexes();
 172         if (!list.isEmpty()) {
 173                 enableButtons(false);
 174                 form_->goTo(typeCO->currentIndex(), list[0]);
 175                 form_->outlineOut();
 176                 enableButtons(true);
 177         }
 178 }
 179
 180
 181 void TocWidget::select(QModelIndex const & index)
 182 {
 183         if (!index.isValid()) {
 184                 lyxerr[Debug::GUI]
 185                         << "TocWidget::select(): QModelIndex is invalid!" << endl;
 186                 return;
 187         }
 188
 189         tocTV->selectionModel()->blockSignals(true);
 190         tocTV->scrollTo(index);
 191         tocTV->selectionModel()->setCurrentIndex(index,
 192                 QItemSelectionModel::ClearAndSelect);
 193         tocTV->selectionModel()->blockSignals(false);
 194 }
 195
 196
 197 void TocWidget::enableButtons(bool enable)
 198 {
 199         updatePB->setEnabled(enable);
 200
 201         if (!form_->canOutline(typeCO->currentIndex()))
 202                 enable = false;
 203
 204         moveUpPB->setEnabled(enable);
 205         moveDownPB->setEnabled(enable);
 206         moveInPB->setEnabled(enable);
 207         moveOutPB->setEnabled(enable);
 208 }
 209
 210
 211 void TocWidget::update()
 212 {
 213         lyxerr[Debug::GUI] << "In TocWidget::update()" << endl;
 214         select(form_->getCurrentIndex(typeCO->currentIndex()));
 215         QWidget::update();
 216 }
 217
 218
 219 void TocWidget::updateGui()
 220 {
 221         QStringListModel * type_model = form_->typeModel();
 222         if (type_model->stringList().isEmpty()) {
 223                 enableButtons(false);
 224                 typeCO->setModel(type_model);
 225                 tocTV->setModel(new QStandardItemModel);
 226                 tocTV->setEditTriggers(QAbstractItemView::NoEditTriggers);
 227                 depthSL->setEnabled(false);
 228                 return;
 229         }
 230
 231         QString current_text = typeCO->currentText();
 232         typeCO->setModel(type_model);
 233         int const current_type = typeCO->findText(current_text);
 234         if (current_type != -1)
 235                 typeCO->setCurrentIndex(current_type);
 236         else
 237                 typeCO->setCurrentIndex(form_->selectedType());
 238
 239         setTocModel(typeCO->currentIndex());
 240 }
 241
 242
 243 void TocWidget::setTocModel(size_t type)
 244 {
 245         bool buttons_enabled = false;
 246         QStandardItemModel * toc_model = form_->tocModel(type);
 247         if (toc_model) {
 248                 buttons_enabled = toc_model->rowCount() > 0;
 249                 tocTV->setModel(toc_model);
 250                 tocTV->setEditTriggers(QAbstractItemView::NoEditTriggers);
 251         }
 252
 253         enableButtons(buttons_enabled);
 254
 255         reconnectSelectionModel();
 256         depthSL->setEnabled(true);
 257         depthSL->setMaximum(form_->getTocDepth(type));
 258         depthSL->setValue(depth_);
 259
 260         lyxerr[Debug::GUI] << "In TocWidget::updateGui()" << endl;
 261
 262         select(form_->getCurrentIndex(typeCO->currentIndex()));
 263
 264         if (toc_model) {
 265                 lyxerr[Debug::GUI]
 266                 << "form_->tocModel()->rowCount "
 267                         << toc_model->rowCount()
 268                         << "\nform_->tocModel()->columnCount "
 269                         << toc_model->columnCount()
 270                         << endl;
 271         }
 272 }
 273
 274
 275 void TocWidget::reconnectSelectionModel()
 276 {
 277         connect(tocTV->selectionModel(),
 278                 SIGNAL(currentChanged(const QModelIndex &,
 279                         const QModelIndex &)),
 280                 this, SLOT(selectionChanged(const QModelIndex &,
 281                         const QModelIndex &)));
 282 }
 283
 284 } // namespace frontend
 285 } // namespace lyx
 286
 287 #include "TocWidget_moc.cpp"