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 "controllers/ControlCommandBuffer.h"
  22
  23 #include "support/filetools.h"
  24
  25 #include <QHBoxLayout>
  26 #include <QKeyEvent>
  27 #include <QLayout>
  28 #include <QListWidget>
  29 #include <QMouseEvent>
  30 #include <QPixmap>
  31 #include <QPushButton>
  32 #include <QToolTip>
  33 #include <QVBoxLayout>
  34
  35 using lyx::support::libFileSearch;
  36
  37 using std::vector;
  38 using std::string;
  39
  40 namespace lyx {
  41 namespace frontend {
  42
  43 namespace {
  44
  45 class QTempListBox : public QListWidget {
  46 public:
  47         QTempListBox() {
  48                 //setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
  49                 setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  50                 setWindowModality(Qt::WindowModal);
  51                 setWindowFlags(Qt::Popup);
  52                 setAttribute(Qt::WA_DeleteOnClose);
  53         }
  54 protected:
  55         void mouseReleaseEvent(QMouseEvent * ev) {
  56                 if (ev->x() < 0 || ev->y() < 0
  57                     || ev->x() > width() || ev->y() > height()) {
  58                         hide();
  59                 } else {
  60                         // emit signal
  61                         itemPressed(currentItem());
  62                 }
  63         }
  64
  65         void keyPressEvent(QKeyEvent * ev) {
  66                 if (ev->key() == Qt::Key_Escape) {
  67                         hide();
  68                         return;
  69                 } else if (ev->key() == Qt::Key_Return || ev->key() == Qt::Key_Space) {
  70                         // emit signal
  71                         itemPressed(currentItem());
  72                 } else
  73                         QListWidget::keyPressEvent(ev);
  74         }
  75 };
  76
  77 } // end of anon
  78
  79
  80 QCommandBuffer::QCommandBuffer(GuiView * view, ControlCommandBuffer & control)
  81         : view_(view), controller_(control)
  82 {
  83         QPixmap qpup(toqstr(libFileSearch("images", "up", "xpm").absFilename()));
  84         QPixmap qpdown(toqstr(libFileSearch("images", "down", "xpm").absFilename()));
  85
  86         QVBoxLayout * top = new QVBoxLayout(this);
  87         QHBoxLayout * layout = new QHBoxLayout(0);
  88
  89         QPushButton * up = new QPushButton(qpup, "", this);
  90         up->setMaximumSize(24, 24);
  91         up->setToolTip(qt_("Previous command"));
  92         connect(up, SIGNAL(clicked()), this, SLOT(up()));
  93         QPushButton * down = new QPushButton(qpdown, "", this);
  94         down->setToolTip(qt_("Next command"));
  95         down->setMaximumSize(24, 24);
  96         connect(down, SIGNAL(clicked()), this, SLOT(down()));
  97
  98         edit_ = new QCommandEdit(this);
  99         edit_->setMinimumSize(edit_->sizeHint());
 100         edit_->setFocusPolicy(Qt::ClickFocus);
 101
 102         connect(edit_, SIGNAL(escapePressed()), this, SLOT(cancel()));
 103         connect(edit_, SIGNAL(returnPressed()), this, SLOT(dispatch()));
 104         connect(edit_, SIGNAL(tabPressed()), this, SLOT(complete()));
 105         connect(edit_, SIGNAL(upPressed()), this, SLOT(up()));
 106         connect(edit_, SIGNAL(downPressed()), this, SLOT(down()));
 107         connect(edit_, SIGNAL(hidePressed()), this, SLOT(hideParent()));
 108
 109         layout->addWidget(up, 0);
 110         layout->addWidget(down, 0);
 111         layout->addWidget(edit_, 10);
 112         layout->setMargin(0);
 113         top->addLayout(layout);
 114         top->setMargin(0);
 115 }
 116
 117
 118
 119 void QCommandBuffer::focus_command()
 120 {
 121         edit_->setFocus();
 122 }
 123
 124
 125 void QCommandBuffer::cancel()
 126 {
 127         view_->setFocus();
 128         edit_->setText(QString());
 129 }
 130
 131
 132 void QCommandBuffer::dispatch()
 133 {
 134         controller_.dispatch(fromqstr(edit_->text()));
 135         view_->setFocus();
 136         edit_->setText(QString());
 137         edit_->clearFocus();
 138 }
 139
 140
 141 void QCommandBuffer::complete()
 142 {
 143         string const input = fromqstr(edit_->text());
 144         string new_input;
 145         vector<string> comp = controller_.completions(input, new_input);
 146
 147         if (comp.empty() && new_input == input) {
 148                 // show_info_suffix(qt_("[no match]"), input);
 149                 return;
 150         }
 151
 152         if (comp.empty()) {
 153                 edit_->setText(toqstr(new_input));
 154         //      show_info_suffix(("[only completion]"), new_input + ' ');
 155                 return;
 156         }
 157
 158         edit_->setText(toqstr(new_input));
 159
 160         QTempListBox * list = new QTempListBox;
 161
 162         // For some reason the scrollview's contents are larger
 163         // than the number of actual items...
 164         vector<string>::const_iterator cit = comp.begin();
 165         vector<string>::const_iterator end = comp.end();
 166         for (; cit != end; ++cit)
 167                 list->addItem(toqstr(*cit));
 168
 169         list->resize(list->sizeHint());
 170         QPoint const pos = edit_->mapToGlobal(QPoint(0, 0));
 171
 172         int const y = std::max(0, pos.y() - list->height());
 173
 174         list->move(pos.x(), y);
 175
 176         connect(list, SIGNAL(itemPressed(QListWidgetItem *)),
 177                 this, SLOT(complete_selected(QListWidgetItem *)));
 178         connect(list, SIGNAL(itemActivated(QListWidgetItem *)),
 179                 this, SLOT(complete_selected(QListWidgetItem *)));
 180
 181         list->show();
 182         list->setFocus();
 183 }
 184
 185
 186 void QCommandBuffer::complete_selected(QListWidgetItem * item)
 187 {
 188         QWidget const * widget = static_cast<QWidget const *>(sender());
 189         const_cast<QWidget *>(widget)->hide();
 190         edit_->setText(item->text() + ' ');
 191         edit_->activateWindow();
 192         edit_->setFocus();
 193 }
 194
 195
 196 void QCommandBuffer::up()
 197 {
 198         string const input = fromqstr(edit_->text());
 199         string const h = controller_.historyUp();
 200
 201         if (h.empty()) {
 202         //      show_info_suffix(qt_("[Beginning of history]"), input);
 203         } else {
 204                 edit_->setText(toqstr(h));
 205         }
 206 }
 207
 208
 209 void QCommandBuffer::down()
 210 {
 211         string const input = fromqstr(edit_->text());
 212         string const h = controller_.historyDown();
 213
 214         if (h.empty()) {
 215         //      show_info_suffix(qt_("[End of history]"), input);
 216         } else {
 217                 edit_->setText(toqstr(h));
 218         }
 219 }
 220
 221
 222 void QCommandBuffer::hideParent()
 223 {
 224         view_->setFocus();
 225         edit_->setText(QString());
 226         edit_->clearFocus();
 227         controller_.hide();
 228 }
 229
 230
 231 #if 0
 232 void XMiniBuffer::show_info_suffix(string const & suffix, string const & input)
 233 {
 234         stored_input_ = input;
 235         info_suffix_shown_ = true;
 236         set_input(input + ' ' + suffix);
 237         suffix_timer_->start();
 238 }
 239
 240
 241 void XMiniBuffer::suffix_timeout()
 242 {
 243         info_suffix_shown_ = false;
 244         set_input(stored_input_);
 245 }
 246
 247 #endif
 248
 249 } // namespace frontend
 250 } // namespace lyx
 251
 252 #include "QCommandBuffer_moc.cpp"