src/frontends/qt4/QCommandBuffer.cpp

   1 /**
   2  * \file QCommandBuffer.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  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 // Qt defines a macro 'signals' that clashes with a boost namespace.
  14 // All is well if the namespace is visible first.
  15 #include "GuiView.h"
  16
  17 #include "QCommandBuffer.h"
  18 #include "QCommandEdit.h"
  19 #include "qt_helpers.h"
  20
  21 #include "support/filetools.h"
  22
  23 #include <QHBoxLayout>
  24 #include <QKeyEvent>
  25 #include <QLayout>
  26 #include <QListWidget>
  27 #include <QMouseEvent>
  28 #include <QPixmap>
  29 #include <QPushButton>
  30 #include <QToolTip>
  31 #include <QVBoxLayout>
  32
  33 using lyx::support::libFileSearch;
  34
  35 using std::vector;
  36 using std::string;
  37
  38 namespace lyx {
  39 namespace frontend {
  40
  41 namespace {
  42
  43 class QTempListBox : public QListWidget {
  44 public:
  45         QTempListBox() {
  46                 //setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
  47                 setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  48                 setWindowModality(Qt::WindowModal);
  49                 setWindowFlags(Qt::Popup);
  50                 setAttribute(Qt::WA_DeleteOnClose);
  51         }
  52 protected:
  53         void mouseReleaseEvent(QMouseEvent * ev) {
  54                 if (ev->x() < 0 || ev->y() < 0
  55                     || ev->x() > width() || ev->y() > height()) {
  56                         hide();
  57                 } else {
  58                         // emit signal
  59                         itemPressed(currentItem());
  60                 }
  61         }
  62
  63         void keyPressEvent(QKeyEvent * ev) {
  64                 if (ev->key() == Qt::Key_Escape) {
  65                         hide();
  66                         return;
  67                 } else if (ev->key() == Qt::Key_Return || ev->key() == Qt::Key_Space) {
  68                         // emit signal
  69                         itemPressed(currentItem());
  70                 } else
  71                         QListWidget::keyPressEvent(ev);
  72         }
  73 };
  74
  75 } // end of anon
  76
  77
  78 QCommandBuffer::QCommandBuffer(GuiView * view)
  79         : view_(view), controller_(*view)
  80 {
  81         QPixmap qpup(toqstr(libFileSearch("images", "up", "xpm").absFilename()));
  82         QPixmap qpdown(toqstr(libFileSearch("images", "down", "xpm").absFilename()));
  83
  84         QVBoxLayout * top = new QVBoxLayout(this);
  85         QHBoxLayout * layout = new QHBoxLayout(0);
  86
  87         QPushButton * up = new QPushButton(qpup, "", this);
  88         up->setMaximumSize(24, 24);
  89         up->setToolTip(qt_("Previous command"));
  90         connect(up, SIGNAL(clicked()), this, SLOT(up()));
  91         QPushButton * down = new QPushButton(qpdown, "", this);
  92         down->setToolTip(qt_("Next command"));
  93         down->setMaximumSize(24, 24);
  94         connect(down, SIGNAL(clicked()), this, SLOT(down()));
  95
  96         edit_ = new QCommandEdit(this);
  97         edit_->setMinimumSize(edit_->sizeHint());
  98         edit_->setFocusPolicy(Qt::ClickFocus);
  99
 100         connect(edit_, SIGNAL(escapePressed()), this, SLOT(cancel()));
 101         connect(edit_, SIGNAL(returnPressed()), this, SLOT(dispatch()));
 102         connect(edit_, SIGNAL(tabPressed()), this, SLOT(complete()));
 103         connect(edit_, SIGNAL(upPressed()), this, SLOT(up()));
 104         connect(edit_, SIGNAL(downPressed()), this, SLOT(down()));
 105         connect(edit_, SIGNAL(hidePressed()), this, SLOT(hideParent()));
 106
 107         layout->addWidget(up, 0);
 108         layout->addWidget(down, 0);
 109         layout->addWidget(edit_, 10);
 110         layout->setMargin(0);
 111         top->addLayout(layout);
 112         top->setMargin(0);
 113         setFocusProxy(edit_);
 114 }
 115
 116
 117 void QCommandBuffer::cancel()
 118 {
 119         view_->setFocus();
 120         edit_->setText(QString());
 121 }
 122
 123
 124 void QCommandBuffer::dispatch()
 125 {
 126         controller_.dispatch(fromqstr(edit_->text()));
 127         view_->setFocus();
 128         edit_->setText(QString());
 129         edit_->clearFocus();
 130 }
 131
 132
 133 void QCommandBuffer::complete()
 134 {
 135         string const input = fromqstr(edit_->text());
 136         string new_input;
 137         vector<string> comp = controller_.completions(input, new_input);
 138
 139         if (comp.empty() && new_input == input) {
 140                 // show_info_suffix(qt_("[no match]"), input);
 141                 return;
 142         }
 143
 144         if (comp.empty()) {
 145                 edit_->setText(toqstr(new_input));
 146         //      show_info_suffix(("[only completion]"), new_input + ' ');
 147                 return;
 148         }
 149
 150         edit_->setText(toqstr(new_input));
 151
 152         QTempListBox * list = new QTempListBox;
 153
 154         // For some reason the scrollview's contents are larger
 155         // than the number of actual items...
 156         vector<string>::const_iterator cit = comp.begin();
 157         vector<string>::const_iterator end = comp.end();
 158         for (; cit != end; ++cit)
 159                 list->addItem(toqstr(*cit));
 160
 161         list->resize(list->sizeHint());
 162         QPoint const pos = edit_->mapToGlobal(QPoint(0, 0));
 163
 164         int const y = std::max(0, pos.y() - list->height());
 165
 166         list->move(pos.x(), y);
 167
 168         connect(list, SIGNAL(itemPressed(QListWidgetItem *)),
 169                 this, SLOT(complete_selected(QListWidgetItem *)));
 170         connect(list, SIGNAL(itemActivated(QListWidgetItem *)),
 171                 this, SLOT(complete_selected(QListWidgetItem *)));
 172
 173         list->show();
 174         list->setFocus();
 175 }
 176
 177
 178 void QCommandBuffer::complete_selected(QListWidgetItem * item)
 179 {
 180         QWidget const * widget = static_cast<QWidget const *>(sender());
 181         const_cast<QWidget *>(widget)->hide();
 182         edit_->setText(item->text() + ' ');
 183         edit_->activateWindow();
 184         edit_->setFocus();
 185 }
 186
 187
 188 void QCommandBuffer::up()
 189 {
 190         string const input = fromqstr(edit_->text());
 191         string const h = controller_.historyUp();
 192
 193         if (h.empty()) {
 194         //      show_info_suffix(qt_("[Beginning of history]"), input);
 195         } else {
 196                 edit_->setText(toqstr(h));
 197         }
 198 }
 199
 200
 201 void QCommandBuffer::down()
 202 {
 203         string const input = fromqstr(edit_->text());
 204         string const h = controller_.historyDown();
 205
 206         if (h.empty()) {
 207         //      show_info_suffix(qt_("[End of history]"), input);
 208         } else {
 209                 edit_->setText(toqstr(h));
 210         }
 211 }
 212
 213
 214 void QCommandBuffer::hideParent()
 215 {
 216         view_->setFocus();
 217         edit_->setText(QString());
 218         edit_->clearFocus();
 219         controller_.hide();
 220 }
 221
 222
 223 #if 0
 224 void XMiniBuffer::show_info_suffix(string const & suffix, string const & input)
 225 {
 226         stored_input_ = input;
 227         info_suffix_shown_ = true;
 228         set_input(input + ' ' + suffix);
 229         suffix_timer_->start();
 230 }
 231
 232
 233 void XMiniBuffer::suffix_timeout()
 234 {
 235         info_suffix_shown_ = false;
 236         set_input(stored_input_);
 237 }
 238
 239 #endif
 240
 241 } // namespace frontend
 242 } // namespace lyx
 243
 244 #include "QCommandBuffer_moc.cpp"