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->setToolTip(qt_("Previous command"));
  88         connect(up, SIGNAL(clicked()), this, SLOT(up()));
  89         QPushButton * down = new QPushButton(qpdown, "", this);
  90         down->setToolTip(qt_("Next command"));
  91         connect(down, SIGNAL(clicked()), this, SLOT(down()));
  92
  93         edit_ = new QCommandEdit(this);
  94         edit_->setMinimumSize(edit_->sizeHint());
  95         edit_->setFocusPolicy(Qt::ClickFocus);
  96
  97         connect(edit_, SIGNAL(escapePressed()), this, SLOT(cancel()));
  98         connect(edit_, SIGNAL(returnPressed()), this, SLOT(dispatch()));
  99         connect(edit_, SIGNAL(tabPressed()), this, SLOT(complete()));
 100         connect(edit_, SIGNAL(upPressed()), this, SLOT(up()));
 101         connect(edit_, SIGNAL(downPressed()), this, SLOT(down()));
 102
 103         layout->addWidget(up, 0);
 104         layout->addWidget(down, 0);
 105         layout->addWidget(edit_, 10);
 106         layout->setMargin(0);
 107         top->addLayout(layout);
 108         top->setMargin(0);
 109 }
 110
 111
 112
 113 void QCommandBuffer::focus_command()
 114 {
 115         edit_->setFocus();
 116 }
 117
 118
 119 void QCommandBuffer::cancel()
 120 {
 121         view_->setFocus();
 122         edit_->setText(QString());
 123 }
 124
 125
 126 void QCommandBuffer::dispatch()
 127 {
 128         controller_.dispatch(fromqstr(edit_->text()));
 129         view_->setFocus();
 130         edit_->setText(QString());
 131         edit_->clearFocus();
 132 }
 133
 134
 135 void QCommandBuffer::complete()
 136 {
 137         string const input = fromqstr(edit_->text());
 138         string new_input;
 139         vector<string> comp = controller_.completions(input, new_input);
 140
 141         if (comp.empty() && new_input == input) {
 142                 // show_info_suffix(qt_("[no match]"), input);
 143                 return;
 144         }
 145
 146         if (comp.empty()) {
 147                 edit_->setText(toqstr(new_input));
 148         //      show_info_suffix(("[only completion]"), new_input + ' ');
 149                 return;
 150         }
 151
 152         edit_->setText(toqstr(new_input));
 153
 154         QTempListBox * list = new QTempListBox;
 155
 156         // For some reason the scrollview's contents are larger
 157         // than the number of actual items...
 158         vector<string>::const_iterator cit = comp.begin();
 159         vector<string>::const_iterator end = comp.end();
 160         for (; cit != end; ++cit)
 161                 list->addItem(toqstr(*cit));
 162
 163         list->resize(list->sizeHint());
 164         QPoint const pos = edit_->mapToGlobal(QPoint(0, 0));
 165
 166         int const y = std::max(0, pos.y() - list->height());
 167
 168         list->move(pos.x(), y);
 169
 170         connect(list, SIGNAL(itemPressed(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_->setFocus();
 184 }
 185
 186
 187 void QCommandBuffer::up()
 188 {
 189         string const input = fromqstr(edit_->text());
 190         string const h = controller_.historyUp();
 191
 192         if (h.empty()) {
 193         //      show_info_suffix(qt_("[Beginning of history]"), input);
 194         } else {
 195                 edit_->setText(toqstr(h));
 196         }
 197 }
 198
 199
 200 void QCommandBuffer::down()
 201 {
 202         string const input = fromqstr(edit_->text());
 203         string const h = controller_.historyDown();
 204
 205         if (h.empty()) {
 206         //      show_info_suffix(qt_("[End of history]"), input);
 207         } else {
 208                 edit_->setText(toqstr(h));
 209         }
 210 }
 211
 212
 213 #if 0
 214 void XMiniBuffer::show_info_suffix(string const & suffix, string const & input)
 215 {
 216         stored_input_ = input;
 217         info_suffix_shown_ = true;
 218         set_input(input + ' ' + suffix);
 219         suffix_timer_->start();
 220 }
 221
 222
 223 void XMiniBuffer::suffix_timeout()
 224 {
 225         info_suffix_shown_ = false;
 226         set_input(stored_input_);
 227 }
 228
 229 #endif
 230
 231 } // namespace frontend
 232 } // namespace lyx
 233
 234 #include "QCommandBuffer_moc.cpp"