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         : view_(view), controller_(control)
  79 {
  80         QPixmap qpup(toqstr(libFileSearch("images", "up", "xpm").absFilename()));
  81         QPixmap qpdown(toqstr(libFileSearch("images", "down", "xpm").absFilename()));
  82
  83         QVBoxLayout * top = new QVBoxLayout(this);
  84         QHBoxLayout * layout = new QHBoxLayout(0);
  85
  86         QPushButton * up = new QPushButton(qpup, "", this);
  87         up->setMaximumSize(24, 24);
  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         down->setMaximumSize(24, 24);
  93         connect(down, SIGNAL(clicked()), this, SLOT(down()));
  94
  95         edit_ = new QCommandEdit(this);
  96         edit_->setMinimumSize(edit_->sizeHint());
  97         edit_->setFocusPolicy(Qt::ClickFocus);
  98
  99         connect(edit_, SIGNAL(escapePressed()), this, SLOT(cancel()));
 100         connect(edit_, SIGNAL(returnPressed()), this, SLOT(dispatch()));
 101         connect(edit_, SIGNAL(tabPressed()), this, SLOT(complete()));
 102         connect(edit_, SIGNAL(upPressed()), this, SLOT(up()));
 103         connect(edit_, SIGNAL(downPressed()), this, SLOT(down()));
 104
 105         layout->addWidget(up, 0);
 106         layout->addWidget(down, 0);
 107         layout->addWidget(edit_, 10);
 108         layout->setMargin(0);
 109         top->addLayout(layout);
 110         top->setMargin(0);
 111 }
 112
 113
 114
 115 void QCommandBuffer::focus_command()
 116 {
 117         edit_->setFocus();
 118 }
 119
 120
 121 void QCommandBuffer::cancel()
 122 {
 123         view_->setFocus();
 124         edit_->setText(QString());
 125 }
 126
 127
 128 void QCommandBuffer::dispatch()
 129 {
 130         controller_.dispatch(fromqstr(edit_->text()));
 131         view_->setFocus();
 132         edit_->setText(QString());
 133         edit_->clearFocus();
 134 }
 135
 136
 137 void QCommandBuffer::complete()
 138 {
 139         string const input = fromqstr(edit_->text());
 140         string new_input;
 141         vector<string> comp = controller_.completions(input, new_input);
 142
 143         if (comp.empty() && new_input == input) {
 144                 // show_info_suffix(qt_("[no match]"), input);
 145                 return;
 146         }
 147
 148         if (comp.empty()) {
 149                 edit_->setText(toqstr(new_input));
 150         //      show_info_suffix(("[only completion]"), new_input + ' ');
 151                 return;
 152         }
 153
 154         edit_->setText(toqstr(new_input));
 155
 156         QTempListBox * list = new QTempListBox;
 157
 158         // For some reason the scrollview's contents are larger
 159         // than the number of actual items...
 160         vector<string>::const_iterator cit = comp.begin();
 161         vector<string>::const_iterator end = comp.end();
 162         for (; cit != end; ++cit)
 163                 list->addItem(toqstr(*cit));
 164
 165         list->resize(list->sizeHint());
 166         QPoint const pos = edit_->mapToGlobal(QPoint(0, 0));
 167
 168         int const y = std::max(0, pos.y() - list->height());
 169
 170         list->move(pos.x(), y);
 171
 172         connect(list, SIGNAL(itemPressed(QListWidgetItem *)),
 173                 this, SLOT(complete_selected(QListWidgetItem *)));
 174         connect(list, SIGNAL(itemActivated(QListWidgetItem *)),
 175                 this, SLOT(complete_selected(QListWidgetItem *)));
 176
 177         list->show();
 178         list->setFocus();
 179 }
 180
 181
 182 void QCommandBuffer::complete_selected(QListWidgetItem * item)
 183 {
 184         QWidget const * widget = static_cast<QWidget const *>(sender());
 185         const_cast<QWidget *>(widget)->hide();
 186         edit_->setText(item->text() + ' ');
 187         edit_->setFocus();
 188 }
 189
 190
 191 void QCommandBuffer::up()
 192 {
 193         string const input = fromqstr(edit_->text());
 194         string const h = controller_.historyUp();
 195
 196         if (h.empty()) {
 197         //      show_info_suffix(qt_("[Beginning of history]"), input);
 198         } else {
 199                 edit_->setText(toqstr(h));
 200         }
 201 }
 202
 203
 204 void QCommandBuffer::down()
 205 {
 206         string const input = fromqstr(edit_->text());
 207         string const h = controller_.historyDown();
 208
 209         if (h.empty()) {
 210         //      show_info_suffix(qt_("[End of history]"), input);
 211         } else {
 212                 edit_->setText(toqstr(h));
 213         }
 214 }
 215
 216
 217 #if 0
 218 void XMiniBuffer::show_info_suffix(string const & suffix, string const & input)
 219 {
 220         stored_input_ = input;
 221         info_suffix_shown_ = true;
 222         set_input(input + ' ' + suffix);
 223         suffix_timer_->start();
 224 }
 225
 226
 227 void XMiniBuffer::suffix_timeout()
 228 {
 229         info_suffix_shown_ = false;
 230         set_input(stored_input_);
 231 }
 232
 233 #endif
 234
 235 } // namespace frontend
 236 } // namespace lyx
 237
 238 #include "QCommandBuffer_moc.cpp"