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                 }
  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         connect(edit_, SIGNAL(hidePressed()), this, SLOT(hideParent()));
 105
 106         layout->addWidget(up, 0);
 107         layout->addWidget(down, 0);
 108         layout->addWidget(edit_, 10);
 109         layout->setMargin(0);
 110         top->addLayout(layout);
 111         top->setMargin(0);
 112 }
 113
 114
 115
 116 void QCommandBuffer::focus_command()
 117 {
 118         edit_->setFocus();
 119 }
 120
 121
 122 void QCommandBuffer::cancel()
 123 {
 124         view_->setFocus();
 125         edit_->setText(QString());
 126 }
 127
 128
 129 void QCommandBuffer::dispatch()
 130 {
 131         controller_.dispatch(fromqstr(edit_->text()));
 132         view_->setFocus();
 133         edit_->setText(QString());
 134         edit_->clearFocus();
 135 }
 136
 137
 138 void QCommandBuffer::complete()
 139 {
 140         string const input = fromqstr(edit_->text());
 141         string new_input;
 142         vector<string> comp = controller_.completions(input, new_input);
 143
 144         if (comp.empty() && new_input == input) {
 145                 // show_info_suffix(qt_("[no match]"), input);
 146                 return;
 147         }
 148
 149         if (comp.empty()) {
 150                 edit_->setText(toqstr(new_input));
 151         //      show_info_suffix(("[only completion]"), new_input + ' ');
 152                 return;
 153         }
 154
 155         edit_->setText(toqstr(new_input));
 156
 157         QTempListBox * list = new QTempListBox;
 158
 159         // For some reason the scrollview's contents are larger
 160         // than the number of actual items...
 161         vector<string>::const_iterator cit = comp.begin();
 162         vector<string>::const_iterator end = comp.end();
 163         for (; cit != end; ++cit)
 164                 list->addItem(toqstr(*cit));
 165
 166         list->resize(list->sizeHint());
 167         QPoint const pos = edit_->mapToGlobal(QPoint(0, 0));
 168
 169         int const y = std::max(0, pos.y() - list->height());
 170
 171         list->move(pos.x(), y);
 172
 173         connect(list, SIGNAL(itemPressed(QListWidgetItem *)),
 174                 this, SLOT(complete_selected(QListWidgetItem *)));
 175         connect(list, SIGNAL(itemActivated(QListWidgetItem *)),
 176                 this, SLOT(complete_selected(QListWidgetItem *)));
 177
 178         list->show();
 179         list->setFocus();
 180 }
 181
 182
 183 void QCommandBuffer::complete_selected(QListWidgetItem * item)
 184 {
 185         QWidget const * widget = static_cast<QWidget const *>(sender());
 186         const_cast<QWidget *>(widget)->hide();
 187         edit_->setText(item->text() + ' ');
 188         edit_->setFocus();
 189 }
 190
 191
 192 void QCommandBuffer::up()
 193 {
 194         string const input = fromqstr(edit_->text());
 195         string const h = controller_.historyUp();
 196
 197         if (h.empty()) {
 198         //      show_info_suffix(qt_("[Beginning of history]"), input);
 199         } else {
 200                 edit_->setText(toqstr(h));
 201         }
 202 }
 203
 204
 205 void QCommandBuffer::down()
 206 {
 207         string const input = fromqstr(edit_->text());
 208         string const h = controller_.historyDown();
 209
 210         if (h.empty()) {
 211         //      show_info_suffix(qt_("[End of history]"), input);
 212         } else {
 213                 edit_->setText(toqstr(h));
 214         }
 215 }
 216
 217
 218 void QCommandBuffer::hideParent()
 219 {
 220         view_->setFocus();
 221         edit_->setText(QString());
 222         edit_->clearFocus();
 223         controller_.hide();
 224 }
 225
 226
 227 #if 0
 228 void XMiniBuffer::show_info_suffix(string const & suffix, string const & input)
 229 {
 230         stored_input_ = input;
 231         info_suffix_shown_ = true;
 232         set_input(input + ' ' + suffix);
 233         suffix_timer_->start();
 234 }
 235
 236
 237 void XMiniBuffer::suffix_timeout()
 238 {
 239         info_suffix_shown_ = false;
 240         set_input(stored_input_);
 241 }
 242
 243 #endif
 244
 245 } // namespace frontend
 246 } // namespace lyx
 247
 248 #include "QCommandBuffer_moc.cpp"