src/frontends/qt4/QCommandBuffer.C

   1 /**
   2  * \file QCommandBuffer.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  *
   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                 }
  70                 QListWidget::keyPressEvent(ev);
  71         }
  72 };
  73
  74 } // end of anon
  75
  76
  77 QCommandBuffer::QCommandBuffer(GuiView * view, ControlCommandBuffer & control,
  78                         QWidget * parent)
  79         : QWidget(parent), view_(view), controller_(control)
  80 {
  81         QPixmap qpup(toqstr(libFileSearch("images", "up", "xpm")));
  82         QPixmap qpdown(toqstr(libFileSearch("images", "down", "xpm")));
  83
  84         QVBoxLayout * top = new QVBoxLayout(this);
  85         QHBoxLayout * layout = new QHBoxLayout(0);
  86
  87         QPushButton * up = new QPushButton(qpup, "", this);
  88         up->setToolTip(qt_("Previous command"));
  89         connect(up, SIGNAL(clicked()), this, SLOT(up()));
  90         QPushButton * down = new QPushButton(qpdown, "", this);
  91         down->setToolTip(qt_("Next command"));
  92         connect(down, SIGNAL(clicked()), this, SLOT(down()));
  93
  94         edit_ = new QCommandEdit(this);
  95         edit_->setMinimumSize(edit_->sizeHint());
  96         edit_->setFocusPolicy(Qt::ClickFocus);
  97
  98         connect(edit_, SIGNAL(escapePressed()), this, SLOT(cancel()));
  99         connect(edit_, SIGNAL(returnPressed()), this, SLOT(dispatch()));
 100         connect(edit_, SIGNAL(tabPressed()), this, SLOT(complete()));
 101         connect(edit_, SIGNAL(upPressed()), this, SLOT(up()));
 102         connect(edit_, SIGNAL(downPressed()), this, SLOT(down()));
 103
 104         layout->addWidget(up, 0);
 105         layout->addWidget(down, 0);
 106         layout->addWidget(edit_, 10);
 107         layout->setMargin(0);
 108         top->addLayout(layout);
 109         top->setMargin(0);
 110 }
 111
 112
 113
 114 void QCommandBuffer::focus_command()
 115 {
 116         edit_->setFocus();
 117 }
 118
 119
 120 void QCommandBuffer::cancel()
 121 {
 122         view_->centralWidget()->setFocus();
 123         edit_->setText(QString());
 124 }
 125
 126
 127 void QCommandBuffer::dispatch()
 128 {
 129         controller_.dispatch(fromqstr(edit_->text()));
 130         view_->centralWidget()->setFocus();
 131         edit_->setText(QString());
 132         edit_->clearFocus();
 133 }
 134
 135
 136 void QCommandBuffer::complete()
 137 {
 138         string const input = fromqstr(edit_->text());
 139         string new_input;
 140         vector<string> comp = controller_.completions(input, new_input);
 141
 142         if (comp.empty() && new_input == input) {
 143                 // show_info_suffix(qt_("[no match]"), input);
 144                 return;
 145         }
 146
 147         if (comp.empty()) {
 148                 edit_->setText(toqstr(new_input));
 149         //      show_info_suffix(("[only completion]"), new_input + ' ');
 150                 return;
 151         }
 152
 153         edit_->setText(toqstr(new_input));
 154
 155         QTempListBox * list = new QTempListBox;
 156
 157         // For some reason the scrollview's contents are larger
 158         // than the number of actual items...
 159         vector<string>::const_iterator cit = comp.begin();
 160         vector<string>::const_iterator end = comp.end();
 161         for (; cit != end; ++cit)
 162                 list->addItem(toqstr(*cit));
 163
 164         list->resize(list->sizeHint());
 165         QPoint const pos = edit_->mapToGlobal(QPoint(0, 0));
 166
 167         int const y = std::max(0, pos.y() - list->height());
 168
 169         list->move(pos.x(), y);
 170
 171         connect(list, SIGNAL(itemPressed(QListWidgetItem *)),
 172                 this, SLOT(complete_selected(QListWidgetItem *)));
 173
 174         list->show();
 175         list->setFocus();
 176 }
 177
 178
 179 void QCommandBuffer::complete_selected(QListWidgetItem * item)
 180 {
 181         QWidget const * widget = static_cast<QWidget const *>(sender());
 182         const_cast<QWidget *>(widget)->hide();
 183         edit_->setText(item->text() + ' ');
 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 #if 0
 215 void XMiniBuffer::show_info_suffix(string const & suffix, string const & input)
 216 {
 217         stored_input_ = input;
 218         info_suffix_shown_ = true;
 219         set_input(input + ' ' + suffix);
 220         suffix_timer_->start();
 221 }
 222
 223
 224 void XMiniBuffer::suffix_timeout()
 225 {
 226         info_suffix_shown_ = false;
 227         set_input(stored_input_);
 228 }
 229
 230 #endif
 231
 232 } // namespace frontend
 233 } // namespace lyx
 234
 235 #include "QCommandBuffer_moc.cpp"