lyx_mirror/src/frontends/qt4/GuiWorkArea.cpp
Abdelrazak Younes f9744033b3 * TabWorkArea: rename 'close tab' button to 'close buffer' and add a 'close tab' button.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@23088 a592a061-630c-0410-9148-cb99ea01b6c8
2008-02-21 12:29:26 +00:00

1223 lines
30 KiB
C++

/**
* \file GuiWorkArea.cpp
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author John Levon
* \author Abdelrazak Younes
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "GuiWorkArea.h"
#include "Buffer.h"
#include "BufferParams.h"
#include "BufferView.h"
#include "CoordCache.h"
#include "Cursor.h"
#include "Font.h"
#include "FuncRequest.h"
#include "GuiApplication.h"
#include "GuiKeySymbol.h"
#include "GuiPainter.h"
#include "GuiPopupMenu.h"
#include "GuiView.h"
#include "KeySymbol.h"
#include "Language.h"
#include "LyXFunc.h"
#include "LyXRC.h"
#include "MetricsInfo.h"
#include "qt_helpers.h"
#include "version.h"
#include "graphics/GraphicsImage.h"
#include "graphics/GraphicsLoader.h"
#include "support/debug.h"
#include "support/gettext.h"
#include "support/FileName.h"
#include "frontends/Application.h"
#include "frontends/FontMetrics.h"
#include "frontends/WorkAreaManager.h"
#include <QContextMenuEvent>
#include <QInputContext>
#include <QHelpEvent>
#include <QMainWindow>
#include <QPainter>
#include <QPalette>
#include <QScrollBar>
#include <QTabBar>
#include <QTimer>
#include <QToolButton>
#include <QToolTip>
#include <boost/bind.hpp>
#ifdef Q_WS_X11
#include <QX11Info>
extern "C" int XEventsQueued(Display *display, int mode);
#endif
#ifdef Q_WS_WIN
int const CursorWidth = 2;
#else
int const CursorWidth = 1;
#endif
#undef KeyPress
#undef NoModifier
using namespace std;
using namespace lyx::support;
namespace lyx {
/// return the LyX mouse button state from Qt's
static mouse_button::state q_button_state(Qt::MouseButton button)
{
mouse_button::state b = mouse_button::none;
switch (button) {
case Qt::LeftButton:
b = mouse_button::button1;
break;
case Qt::MidButton:
b = mouse_button::button2;
break;
case Qt::RightButton:
b = mouse_button::button3;
break;
default:
break;
}
return b;
}
/// return the LyX mouse button state from Qt's
mouse_button::state q_motion_state(Qt::MouseButtons state)
{
mouse_button::state b = mouse_button::none;
if (state & Qt::LeftButton)
b |= mouse_button::button1;
if (state & Qt::MidButton)
b |= mouse_button::button2;
if (state & Qt::RightButton)
b |= mouse_button::button3;
return b;
}
namespace frontend {
class CursorWidget {
public:
CursorWidget() {}
void draw(QPainter & painter)
{
if (show_ && rect_.isValid()) {
switch (shape_) {
case L_SHAPE:
painter.fillRect(rect_.x(), rect_.y(), CursorWidth, rect_.height(), color_);
painter.setPen(color_);
painter.drawLine(rect_.bottomLeft().x() + CursorWidth, rect_.bottomLeft().y(),
rect_.bottomRight().x(), rect_.bottomLeft().y());
break;
case REVERSED_L_SHAPE:
painter.fillRect(rect_.x() + rect_.height() / 3, rect_.y(), CursorWidth, rect_.height(), color_);
painter.setPen(color_);
painter.drawLine(rect_.bottomRight().x() - CursorWidth, rect_.bottomLeft().y(),
rect_.bottomLeft().x(), rect_.bottomLeft().y());
break;
default:
painter.fillRect(rect_, color_);
break;
}
}
}
void update(int x, int y, int h, CursorShape shape)
{
color_ = guiApp->colorCache().get(Color_cursor);
shape_ = shape;
switch (shape) {
case L_SHAPE:
rect_ = QRect(x, y, CursorWidth + h / 3, h);
break;
case REVERSED_L_SHAPE:
rect_ = QRect(x - h / 3, y, CursorWidth + h / 3, h);
break;
default:
rect_ = QRect(x, y, CursorWidth, h);
break;
}
}
void show(bool set_show = true) { show_ = set_show; }
void hide() { show_ = false; }
QRect const & rect() { return rect_; }
private:
///
CursorShape shape_;
///
bool show_;
///
QColor color_;
///
QRect rect_;
};
// This is a 'heartbeat' generating synthetic mouse move events when the
// cursor is at the top or bottom edge of the viewport. One scroll per 0.2 s
SyntheticMouseEvent::SyntheticMouseEvent()
: timeout(200), restart_timeout(true),
x_old(-1), y_old(-1), scrollbar_value_old(-1.0)
{}
GuiWorkArea::GuiWorkArea(Buffer & buffer, GuiView & lv)
: buffer_view_(new BufferView(buffer)), lyx_view_(&lv),
cursor_visible_(false),
need_resize_(false), schedule_redraw_(false),
preedit_lines_(1)
{
buffer.workAreaManager().add(this);
// Setup the signals
connect(&cursor_timeout_, SIGNAL(timeout()),
this, SLOT(toggleCursor()));
int const time = QApplication::cursorFlashTime() / 2;
if (time > 0) {
cursor_timeout_.setInterval(time);
cursor_timeout_.start();
} else
// let's initialize this just to be safe
cursor_timeout_.setInterval(500);
screen_ = QPixmap(viewport()->width(), viewport()->height());
cursor_ = new frontend::CursorWidget();
cursor_->hide();
setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
setAcceptDrops(true);
setMouseTracking(true);
setMinimumSize(100, 70);
updateWindowTitle();
viewport()->setAutoFillBackground(false);
// We don't need double-buffering nor SystemBackground on
// the viewport because we have our own backing pixmap.
viewport()->setAttribute(Qt::WA_NoSystemBackground);
setFocusPolicy(Qt::WheelFocus);
viewport()->setCursor(Qt::IBeamCursor);
synthetic_mouse_event_.timeout.timeout.connect(
boost::bind(&GuiWorkArea::generateSyntheticMouseEvent,
this));
// Initialize the vertical Scroll Bar
QObject::connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
this, SLOT(scrollTo(int)));
LYXERR(Debug::GUI, "viewport width: " << viewport()->width()
<< " viewport height: " << viewport()->height());
// Enables input methods for asian languages.
// Must be set when creating custom text editing widgets.
setAttribute(Qt::WA_InputMethodEnabled, true);
}
GuiWorkArea::~GuiWorkArea()
{
buffer_view_->buffer().workAreaManager().remove(this);
delete buffer_view_;
delete cursor_;
}
void GuiWorkArea::close()
{
lyx_view_->removeWorkArea(this);
}
void GuiWorkArea::setFullScreen(bool full_screen)
{
buffer_view_->setFullScreen(full_screen);
if (full_screen) {
setFrameStyle(QFrame::NoFrame);
if (lyxrc.full_screen_scrollbar)
setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
} else {
setFrameStyle(QFrame::Box);
setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
}
}
BufferView & GuiWorkArea::bufferView()
{
return *buffer_view_;
}
BufferView const & GuiWorkArea::bufferView() const
{
return *buffer_view_;
}
void GuiWorkArea::stopBlinkingCursor()
{
cursor_timeout_.stop();
hideCursor();
}
void GuiWorkArea::startBlinkingCursor()
{
showCursor();
//we're not supposed to cache this value.
int const time = QApplication::cursorFlashTime() / 2;
if (time <= 0)
return;
cursor_timeout_.setInterval(time);
cursor_timeout_.start();
}
void GuiWorkArea::redraw()
{
if (!isVisible())
// No need to redraw in this case.
return;
// No need to do anything if this is the current view. The BufferView
// metrics are already up to date.
if (lyx_view_ != guiApp->currentView()
|| lyx_view_->currentWorkArea() != this) {
// FIXME: it would be nice to optimize for the off-screen case.
buffer_view_->updateMetrics();
buffer_view_->cursor().fixIfBroken();
}
// update cursor position, because otherwise it has to wait until
// the blinking interval is over
if (cursor_visible_) {
hideCursor();
showCursor();
}
LYXERR(Debug::WORKAREA, "WorkArea::redraw screen");
updateScreen();
update(0, 0, viewport()->width(), viewport()->height());
/// \warning: scrollbar updating *must* be done after the BufferView is drawn
/// because \c BufferView::updateScrollbar() is called in \c BufferView::draw().
updateScrollbar();
lyx_view_->updateStatusBar();
if (lyxerr.debugging(Debug::WORKAREA))
buffer_view_->coordCache().dump();
}
void GuiWorkArea::processKeySym(KeySymbol const & key, KeyModifier mod)
{
// In order to avoid bad surprise in the middle of an operation,
// we better stop the blinking cursor...
// the cursor gets restarted in GuiView::restartCursor()
stopBlinkingCursor();
theLyXFunc().setLyXView(lyx_view_);
theLyXFunc().processKeySym(key, mod);
}
void GuiWorkArea::dispatch(FuncRequest const & cmd0, KeyModifier mod)
{
// Handle drag&drop
if (cmd0.action == LFUN_FILE_OPEN) {
lyx_view_->dispatch(cmd0);
return;
}
theLyXFunc().setLyXView(lyx_view_);
FuncRequest cmd;
if (cmd0.action == LFUN_MOUSE_PRESS) {
if (mod == ShiftModifier)
cmd = FuncRequest(cmd0, "region-select");
else if (mod == ControlModifier)
cmd = FuncRequest(cmd0, "paragraph-select");
else
cmd = cmd0;
}
else
cmd = cmd0;
bool const notJustMovingTheMouse =
cmd.action != LFUN_MOUSE_MOTION || cmd.button() != mouse_button::none;
// In order to avoid bad surprise in the middle of an operation, we better stop
// the blinking cursor.
if (notJustMovingTheMouse)
stopBlinkingCursor();
buffer_view_->mouseEventDispatch(cmd);
// Skip these when selecting
if (cmd.action != LFUN_MOUSE_MOTION) {
lyx_view_->updateLayoutList();
lyx_view_->updateToolbars();
}
// GUI tweaks except with mouse motion with no button pressed.
if (notJustMovingTheMouse) {
// Slight hack: this is only called currently when we
// clicked somewhere, so we force through the display
// of the new status here.
lyx_view_->clearMessage();
// Show the cursor immediately after any operation
startBlinkingCursor();
}
}
void GuiWorkArea::resizeBufferView()
{
// WARNING: Please don't put any code that will trigger a repaint here!
// We are already inside a paint event.
lyx_view_->setBusy(true);
buffer_view_->resize(viewport()->width(), viewport()->height());
updateScreen();
// Update scrollbars which might have changed due different
// BufferView dimension. This is especially important when the
// BufferView goes from zero-size to the real-size for the first time,
// as the scrollbar paramters are then set for the first time.
updateScrollbar();
lyx_view_->updateLayoutList();
lyx_view_->setBusy(false);
need_resize_ = false;
}
void GuiWorkArea::showCursor()
{
if (cursor_visible_)
return;
CursorShape shape = BAR_SHAPE;
Font const & realfont = buffer_view_->cursor().real_current_font;
BufferParams const & bp = buffer_view_->buffer().params();
bool const samelang = realfont.language() == bp.language;
bool const isrtl = realfont.isVisibleRightToLeft();
if (!samelang || isrtl != bp.language->rightToLeft()) {
shape = L_SHAPE;
if (isrtl)
shape = REVERSED_L_SHAPE;
}
// The ERT language hack needs fixing up
if (realfont.language() == latex_language)
shape = BAR_SHAPE;
Font const font = buffer_view_->cursor().getFont();
FontMetrics const & fm = theFontMetrics(font);
int const asc = fm.maxAscent();
int const des = fm.maxDescent();
int h = asc + des;
int x = 0;
int y = 0;
buffer_view_->cursor().getPos(x, y);
y -= asc;
// if it doesn't touch the screen, don't try to show it
if (y + h < 0 || y >= viewport()->height())
return;
cursor_visible_ = true;
showCursor(x, y, h, shape);
}
void GuiWorkArea::hideCursor()
{
if (!cursor_visible_)
return;
cursor_visible_ = false;
removeCursor();
}
void GuiWorkArea::toggleCursor()
{
if (cursor_visible_)
hideCursor();
else
showCursor();
}
void GuiWorkArea::updateScrollbar()
{
ScrollbarParameters const & scroll_ = buffer_view_->scrollbarParameters();
verticalScrollBar()->setRange(scroll_.min, scroll_.max);
verticalScrollBar()->setPageStep(scroll_.page_step);
verticalScrollBar()->setSingleStep(scroll_.single_step);
// Block the scrollbar signal to prevent recursive signal/slot calling.
verticalScrollBar()->blockSignals(true);
verticalScrollBar()->setValue(scroll_.position);
verticalScrollBar()->setSliderPosition(scroll_.position);
verticalScrollBar()->blockSignals(false);
}
void GuiWorkArea::scrollTo(int value)
{
stopBlinkingCursor();
buffer_view_->scrollDocView(value);
if (lyxrc.cursor_follows_scrollbar) {
buffer_view_->setCursorFromScrollbar();
lyx_view_->updateLayoutList();
}
// Show the cursor immediately after any operation.
startBlinkingCursor();
QApplication::syncX();
}
bool GuiWorkArea::event(QEvent * e)
{
switch (e->type()) {
case QEvent::ToolTip: {
QHelpEvent * helpEvent = static_cast<QHelpEvent *>(e);
if (lyxrc.use_tooltip) {
QPoint pos = helpEvent->pos();
if (pos.x() < viewport()->width()) {
QString s = toqstr(buffer_view_->toolTip(pos.x(), pos.y()));
QToolTip::showText(helpEvent->globalPos(), s);
}
else
QToolTip::hideText();
}
// Don't forget to accept the event!
e->accept();
return true;
}
case QEvent::ShortcutOverride: {
// We catch this event in order to catch the Tab or Shift+Tab key press
// which are otherwise reserved to focus switching between controls
// within a dialog.
QKeyEvent * ke = static_cast<QKeyEvent*>(e);
if ((ke->key() != Qt::Key_Tab && ke->key() != Qt::Key_Backtab)
|| ke->modifiers() & Qt::ControlModifier)
return QAbstractScrollArea::event(e);
keyPressEvent(ke);
return true;
}
default:
return QAbstractScrollArea::event(e);
}
return false;
}
void GuiWorkArea::contextMenuEvent(QContextMenuEvent * e)
{
QPoint pos = e->pos();
docstring name = buffer_view_->contextMenu(pos.x(), pos.y());
if (name.empty()) {
QAbstractScrollArea::contextMenuEvent(e);
return;
}
QMenu * menu = guiApp->menus().menu(toqstr(name));
if (!menu) {
QAbstractScrollArea::contextMenuEvent(e);
return;
}
// Position the menu to the right.
// FIXME: menu position should be different for RTL text.
menu->exec(e->globalPos());
e->accept();
}
void GuiWorkArea::focusInEvent(QFocusEvent * /*event*/)
{
lyx_view_->setCurrentWorkArea(this);
// Repaint the whole screen.
// Note: this is different from redraw() as only the backing pixmap
// will be redrawn, which is cheap.
viewport()->repaint();
startBlinkingCursor();
}
void GuiWorkArea::focusOutEvent(QFocusEvent * /*event*/)
{
stopBlinkingCursor();
}
void GuiWorkArea::mousePressEvent(QMouseEvent * e)
{
if (dc_event_.active && dc_event_ == *e) {
dc_event_.active = false;
FuncRequest cmd(LFUN_MOUSE_TRIPLE, e->x(), e->y(),
q_button_state(e->button()));
dispatch(cmd);
return;
}
inputContext()->reset();
FuncRequest const cmd(LFUN_MOUSE_PRESS, e->x(), e->y(),
q_button_state(e->button()));
dispatch(cmd, q_key_state(e->modifiers()));
}
void GuiWorkArea::mouseReleaseEvent(QMouseEvent * e)
{
if (synthetic_mouse_event_.timeout.running())
synthetic_mouse_event_.timeout.stop();
FuncRequest const cmd(LFUN_MOUSE_RELEASE, e->x(), e->y(),
q_button_state(e->button()));
dispatch(cmd);
}
void GuiWorkArea::mouseMoveEvent(QMouseEvent * e)
{
// we kill the triple click if we move
doubleClickTimeout();
FuncRequest cmd(LFUN_MOUSE_MOTION, e->x(), e->y(),
q_motion_state(e->buttons()));
// If we're above or below the work area...
if (e->y() <= 20 || e->y() >= viewport()->height() - 20) {
// Make sure only a synthetic event can cause a page scroll,
// so they come at a steady rate:
if (e->y() <= 20)
// _Force_ a scroll up:
cmd.y = -40;
else
cmd.y = viewport()->height();
// Store the event, to be handled when the timeout expires.
synthetic_mouse_event_.cmd = cmd;
if (synthetic_mouse_event_.timeout.running())
// Discard the event. Note that it _may_ be handled
// when the timeout expires if
// synthetic_mouse_event_.cmd has not been overwritten.
// Ie, when the timeout expires, we handle the
// most recent event but discard all others that
// occurred after the one used to start the timeout
// in the first place.
return;
synthetic_mouse_event_.restart_timeout = true;
synthetic_mouse_event_.timeout.start();
// Fall through to handle this event...
} else if (synthetic_mouse_event_.timeout.running()) {
// Store the event, to be possibly handled when the timeout
// expires.
// Once the timeout has expired, normal control is returned
// to mouseMoveEvent (restart_timeout = false).
// This results in a much smoother 'feel' when moving the
// mouse back into the work area.
synthetic_mouse_event_.cmd = cmd;
synthetic_mouse_event_.restart_timeout = false;
return;
}
// Has anything changed on-screen since the last QMouseEvent
// was received?
double const scrollbar_value = verticalScrollBar()->value();
if (e->x() == synthetic_mouse_event_.x_old
&& e->y() == synthetic_mouse_event_.y_old
&& scrollbar_value == synthetic_mouse_event_.scrollbar_value_old) {
// Nothing changed on-screen since the last QMouseEvent.
return;
}
// Yes something has changed. Store the params used to check this.
synthetic_mouse_event_.x_old = e->x();
synthetic_mouse_event_.y_old = e->y();
synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
// ... and dispatch the event to the LyX core.
dispatch(cmd);
}
void GuiWorkArea::wheelEvent(QWheelEvent * e)
{
// Wheel rotation by one notch results in a delta() of 120 (see
// documentation of QWheelEvent)
double const lines = qApp->wheelScrollLines()
* lyxrc.mouse_wheel_speed
* e->delta() / 120.0;
LYXERR(Debug::SCROLLING, "wheelScrollLines = " << qApp->wheelScrollLines()
<< " delta = " << e->delta()
<< " lines = " << lines);
verticalScrollBar()->setValue(verticalScrollBar()->value() -
int(lines * verticalScrollBar()->singleStep()));
}
void GuiWorkArea::generateSyntheticMouseEvent()
{
// Set things off to generate the _next_ 'pseudo' event.
if (synthetic_mouse_event_.restart_timeout)
synthetic_mouse_event_.timeout.start();
// Has anything changed on-screen since the last timeout signal
// was received?
double const scrollbar_value = verticalScrollBar()->value();
if (scrollbar_value != synthetic_mouse_event_.scrollbar_value_old) {
// Yes it has. Store the params used to check this.
synthetic_mouse_event_.scrollbar_value_old = scrollbar_value;
// ... and dispatch the event to the LyX core.
dispatch(synthetic_mouse_event_.cmd);
}
}
void GuiWorkArea::keyPressEvent(QKeyEvent * ev)
{
// do nothing if there are other events
// (the auto repeated events come too fast)
// \todo FIXME: remove hard coded Qt keys, process the key binding
#ifdef Q_WS_X11
if (XEventsQueued(QX11Info::display(), 0) > 1 && ev->isAutoRepeat()
&& (Qt::Key_PageDown || Qt::Key_PageUp)) {
LYXERR(Debug::KEY, "system is busy: scroll key event ignored");
ev->ignore();
return;
}
#endif
LYXERR(Debug::KEY, " count: " << ev->count()
<< " text: " << fromqstr(ev->text())
<< " isAutoRepeat: " << ev->isAutoRepeat() << " key: " << ev->key());
KeySymbol sym;
setKeySymbol(&sym, ev);
processKeySym(sym, q_key_state(ev->modifiers()));
ev->accept();
}
void GuiWorkArea::doubleClickTimeout()
{
dc_event_.active = false;
}
void GuiWorkArea::mouseDoubleClickEvent(QMouseEvent * ev)
{
dc_event_ = DoubleClick(ev);
QTimer::singleShot(QApplication::doubleClickInterval(), this,
SLOT(doubleClickTimeout()));
FuncRequest cmd(LFUN_MOUSE_DOUBLE,
ev->x(), ev->y(),
q_button_state(ev->button()));
dispatch(cmd);
}
void GuiWorkArea::resizeEvent(QResizeEvent * ev)
{
QAbstractScrollArea::resizeEvent(ev);
need_resize_ = true;
}
void GuiWorkArea::update(int x, int y, int w, int h)
{
viewport()->repaint(x, y, w, h);
}
void GuiWorkArea::paintEvent(QPaintEvent * ev)
{
QRect const rc = ev->rect();
// LYXERR(Debug::PAINTING, "paintEvent begin: x: " << rc.x()
// << " y: " << rc.y() << " w: " << rc.width() << " h: " << rc.height());
if (need_resize_) {
screen_ = QPixmap(viewport()->width(), viewport()->height());
resizeBufferView();
hideCursor();
showCursor();
}
QPainter pain(viewport());
pain.drawPixmap(rc, screen_, rc);
cursor_->draw(pain);
}
void GuiWorkArea::updateScreen()
{
GuiPainter pain(&screen_);
buffer_view_->draw(pain);
}
void GuiWorkArea::showCursor(int x, int y, int h, CursorShape shape)
{
if (schedule_redraw_) {
buffer_view_->updateMetrics();
updateScreen();
viewport()->update(QRect(0, 0, viewport()->width(), viewport()->height()));
schedule_redraw_ = false;
// Show the cursor immediately after the update.
hideCursor();
toggleCursor();
return;
}
cursor_->update(x, y, h, shape);
cursor_->show();
viewport()->update(cursor_->rect());
}
void GuiWorkArea::removeCursor()
{
cursor_->hide();
//if (!qApp->focusWidget())
viewport()->update(cursor_->rect());
}
void GuiWorkArea::inputMethodEvent(QInputMethodEvent * e)
{
QString const & commit_string = e->commitString();
docstring const & preedit_string
= qstring_to_ucs4(e->preeditString());
if (!commit_string.isEmpty()) {
LYXERR(Debug::KEY, "preeditString: " << fromqstr(e->preeditString())
<< " commitString: " << fromqstr(e->commitString()));
int key = 0;
// FIXME Iwami 04/01/07: we should take care also of UTF16 surrogates here.
for (int i = 0; i != commit_string.size(); ++i) {
QKeyEvent ev(QEvent::KeyPress, key, Qt::NoModifier, commit_string[i]);
keyPressEvent(&ev);
}
}
// Hide the cursor during the kana-kanji transformation.
if (preedit_string.empty())
startBlinkingCursor();
else
stopBlinkingCursor();
// last_width : for checking if last preedit string was/wasn't empty.
static bool last_width = false;
if (!last_width && preedit_string.empty()) {
// if last_width is last length of preedit string.
e->accept();
return;
}
GuiPainter pain(&screen_);
buffer_view_->updateMetrics();
buffer_view_->draw(pain);
FontInfo font = buffer_view_->cursor().getFont().fontInfo();
FontMetrics const & fm = theFontMetrics(font);
int height = fm.maxHeight();
int cur_x = cursor_->rect().left();
int cur_y = cursor_->rect().bottom();
// redraw area of preedit string.
update(0, cur_y - height, viewport()->width(),
(height + 1) * preedit_lines_);
if (preedit_string.empty()) {
last_width = false;
preedit_lines_ = 1;
e->accept();
return;
}
last_width = true;
// att : stores an IM attribute.
QList<QInputMethodEvent::Attribute> const & att = e->attributes();
// get attributes of input method cursor.
// cursor_pos : cursor position in preedit string.
size_t cursor_pos = 0;
bool cursor_is_visible = false;
for (int i = 0; i != att.size(); ++i) {
if (att.at(i).type == QInputMethodEvent::Cursor) {
cursor_pos = att.at(i).start;
cursor_is_visible = att.at(i).length != 0;
break;
}
}
size_t preedit_length = preedit_string.length();
// get position of selection in input method.
// FIXME: isn't there a way to do this simplier?
// rStart : cursor position in selected string in IM.
size_t rStart = 0;
// rLength : selected string length in IM.
size_t rLength = 0;
if (cursor_pos < preedit_length) {
for (int i = 0; i != att.size(); ++i) {
if (att.at(i).type == QInputMethodEvent::TextFormat) {
if (att.at(i).start <= int(cursor_pos)
&& int(cursor_pos) < att.at(i).start + att.at(i).length) {
rStart = att.at(i).start;
rLength = att.at(i).length;
if (!cursor_is_visible)
cursor_pos += rLength;
break;
}
}
}
}
else {
rStart = cursor_pos;
rLength = 0;
}
int const right_margin = buffer_view_->rightMargin();
Painter::preedit_style ps;
// Most often there would be only one line:
preedit_lines_ = 1;
for (size_t pos = 0; pos != preedit_length; ++pos) {
char_type const typed_char = preedit_string[pos];
// reset preedit string style
ps = Painter::preedit_default;
// if we reached the right extremity of the screen, go to next line.
if (cur_x + fm.width(typed_char) > viewport()->width() - right_margin) {
cur_x = right_margin;
cur_y += height + 1;
++preedit_lines_;
}
// preedit strings are displayed with dashed underline
// and partial strings are displayed white on black indicating
// that we are in selecting mode in the input method.
// FIXME: rLength == preedit_length is not a changing condition
// FIXME: should be put out of the loop.
if (pos >= rStart
&& pos < rStart + rLength
&& !(cursor_pos < rLength && rLength == preedit_length))
ps = Painter::preedit_selecting;
if (pos == cursor_pos
&& (cursor_pos < rLength && rLength == preedit_length))
ps = Painter::preedit_cursor;
// draw one character and update cur_x.
cur_x += pain.preeditText(cur_x, cur_y, typed_char, font, ps);
}
// update the preedit string screen area.
update(0, cur_y - preedit_lines_*height, viewport()->width(),
(height + 1) * preedit_lines_);
// Don't forget to accept the event!
e->accept();
}
QVariant GuiWorkArea::inputMethodQuery(Qt::InputMethodQuery query) const
{
QRect cur_r(0,0,0,0);
switch (query) {
// this is the CJK-specific composition window position.
case Qt::ImMicroFocus:
cur_r = cursor_->rect();
if (preedit_lines_ != 1)
cur_r.moveLeft(10);
cur_r.moveBottom(cur_r.bottom() + cur_r.height() * preedit_lines_);
// return lower right of cursor in LyX.
return cur_r;
default:
return QWidget::inputMethodQuery(query);
}
}
void GuiWorkArea::updateWindowTitle()
{
docstring maximize_title;
docstring minimize_title;
Buffer & buf = buffer_view_->buffer();
FileName const fileName = buf.fileName();
if (!fileName.empty()) {
maximize_title = fileName.displayName(30);
minimize_title = from_utf8(fileName.onlyFileName());
if (!buf.isClean()) {
maximize_title += _(" (changed)");
minimize_title += char_type('*');
}
if (buf.isReadonly())
maximize_title += _(" (read only)");
}
QString title = windowTitle();
QString new_title = toqstr(maximize_title);
if (title == new_title)
return;
QWidget::setWindowTitle(new_title);
QWidget::setWindowIconText(toqstr(minimize_title));
titleChanged(this);
}
void GuiWorkArea::setReadOnly(bool)
{
updateWindowTitle();
if (this == lyx_view_->currentWorkArea())
lyx_view_->updateBufferDependent(false);
}
////////////////////////////////////////////////////////////////////
//
// TabWorkArea
//
////////////////////////////////////////////////////////////////////
TabWorkArea::TabWorkArea(QWidget * parent) : QTabWidget(parent)
{
QPalette pal = palette();
pal.setColor(QPalette::Active, QPalette::Button,
pal.color(QPalette::Active, QPalette::Window));
pal.setColor(QPalette::Disabled, QPalette::Button,
pal.color(QPalette::Disabled, QPalette::Window));
pal.setColor(QPalette::Inactive, QPalette::Button,
pal.color(QPalette::Inactive, QPalette::Window));
QObject::connect(this, SIGNAL(currentChanged(int)),
this, SLOT(on_currentTabChanged(int)));
QToolButton * closeBufferButton = new QToolButton(this);
closeBufferButton->setPalette(pal);
// FIXME: rename the icon to closebuffer.png
closeBufferButton->setIcon(QIcon(":/images/closetab.png"));
closeBufferButton->setText("Close Buffer");
closeBufferButton->setAutoRaise(true);
closeBufferButton->setCursor(Qt::ArrowCursor);
closeBufferButton->setToolTip(tr("Close Buffer"));
closeBufferButton->setEnabled(true);
QObject::connect(closeBufferButton, SIGNAL(clicked()),
this, SLOT(closeCurrentBuffer()));
setCornerWidget(closeBufferButton, Qt::TopRightCorner);
QToolButton * closeTabButton = new QToolButton(this);
closeTabButton->setPalette(pal);
// FIXME: we need another icon for this.
closeTabButton->setIcon(QIcon(":/images/closetab.png"));
closeTabButton->setText("Minimize Buffer");
closeTabButton->setAutoRaise(true);
closeTabButton->setCursor(Qt::ArrowCursor);
closeTabButton->setToolTip(tr("Close tab"));
closeTabButton->setEnabled(true);
QObject::connect(closeTabButton, SIGNAL(clicked()),
this, SLOT(closeCurrentTab()));
setCornerWidget(closeTabButton, Qt::TopLeftCorner);
setUsesScrollButtons(true);
}
void TabWorkArea::setFullScreen(bool full_screen)
{
for (int i = 0; i != count(); ++i) {
if (GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i)))
wa->setFullScreen(full_screen);
}
if (lyxrc.full_screen_tabbar)
showBar(!full_screen && count()>1);
}
void TabWorkArea::showBar(bool show)
{
tabBar()->setEnabled(show);
tabBar()->setVisible(show);
}
GuiWorkArea * TabWorkArea::currentWorkArea()
{
if (count() == 0)
return 0;
GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(currentWidget());
BOOST_ASSERT(wa);
return wa;
}
GuiWorkArea * TabWorkArea::workArea(Buffer & buffer)
{
for (int i = 0; i != count(); ++i) {
GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
BOOST_ASSERT(wa);
if (&wa->bufferView().buffer() == &buffer)
return wa;
}
return 0;
}
void TabWorkArea::closeAll()
{
while (count()) {
GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(0));
BOOST_ASSERT(wa);
removeTab(0);
delete wa;
}
}
bool TabWorkArea::setCurrentWorkArea(GuiWorkArea * work_area)
{
BOOST_ASSERT(work_area);
int index = indexOf(work_area);
if (index == -1)
return false;
if (index == currentIndex())
// Make sure the work area is up to date.
on_currentTabChanged(index);
else
// Switch to the work area.
setCurrentIndex(index);
work_area->setFocus();
return true;
}
GuiWorkArea * TabWorkArea::addWorkArea(Buffer & buffer, GuiView & view)
{
GuiWorkArea * wa = new GuiWorkArea(buffer, view);
wa->setUpdatesEnabled(false);
// Hide tabbar if there's no tab (avoid a resize and a flashing tabbar
// when hiding it again below).
showBar(count() > 0);
addTab(wa, wa->windowTitle());
QObject::connect(wa, SIGNAL(titleChanged(GuiWorkArea *)),
this, SLOT(updateTabText(GuiWorkArea *)));
// Hide tabbar if there's only one tab.
showBar(count() > 1);
return wa;
}
bool TabWorkArea::removeWorkArea(GuiWorkArea * work_area)
{
BOOST_ASSERT(work_area);
int index = indexOf(work_area);
if (index == -1)
return false;
work_area->setUpdatesEnabled(false);
removeTab(index);
delete work_area;
if (count()) {
// make sure the next work area is enabled.
currentWidget()->setUpdatesEnabled(true);
// Hide tabbar if there's only one tab.
showBar(count() > 1);
}
return true;
}
void TabWorkArea::on_currentTabChanged(int i)
{
GuiWorkArea * wa = dynamic_cast<GuiWorkArea *>(widget(i));
BOOST_ASSERT(wa);
BufferView & bv = wa->bufferView();
bv.cursor().fixIfBroken();
bv.updateMetrics();
wa->setUpdatesEnabled(true);
wa->redraw();
wa->setFocus();
///
currentWorkAreaChanged(wa);
LYXERR(Debug::GUI, "currentTabChanged " << i
<< "File" << bv.buffer().absFileName());
}
void TabWorkArea::closeCurrentBuffer()
{
lyx::dispatch(FuncRequest(LFUN_BUFFER_CLOSE));
}
void TabWorkArea::closeCurrentTab()
{
removeWorkArea(currentWorkArea());
}
void TabWorkArea::updateTabText(GuiWorkArea * wa)
{
int const i = indexOf(wa);
if (i < 0)
return;
setTabText(i, wa->windowTitle());
}
} // namespace frontend
} // namespace lyx
#include "GuiWorkArea_moc.cpp"