lyx_mirror/src/frontends/screen.C
André Pönitz 84b462dd37 ismall stuff
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@8144 a592a061-630c-0410-9148-cb99ea01b6c8
2003-11-28 08:55:12 +00:00

306 lines
6.2 KiB
C

/**
* \file screen.C
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author John Levon
*
* Full author contact details are available in file CREDITS.
*
* Splash screen code added by Angus Leeming
*/
#include <config.h>
#include "screen.h"
#include "font_metrics.h"
#include "lyx_gui.h"
#include "Painter.h"
#include "WorkArea.h"
#include "BufferView.h"
#include "buffer.h"
#include "bufferparams.h"
#include "cursor.h"
#include "debug.h"
#include "language.h"
#include "LColor.h"
#include "lyxfont.h"
#include "lyxrc.h"
#include "lyxrow.h"
#include "lyxtext.h"
#include "metricsinfo.h"
#include "paragraph.h"
#include "rowpainter.h"
#include "version.h"
#include "insets/updatableinset.h"
#include "graphics/GraphicsImage.h"
#include "graphics/GraphicsLoader.h"
#include "support/filetools.h" // LibFileSearch
#include <boost/utility.hpp>
#include <boost/bind.hpp>
#include <boost/signals/trackable.hpp>
using lyx::support::LibFileSearch;
using std::endl;
using std::min;
using std::max;
using std::string;
namespace {
class SplashScreen : boost::noncopyable, boost::signals::trackable {
public:
/// This is a singleton class. Get the instance.
static SplashScreen const & get();
///
lyx::graphics::Image const * image() const { return loader_.image(); }
///
string const & text() const { return text_; }
///
LyXFont const & font() const { return font_; }
///
void connect(lyx::graphics::Loader::slot_type const & slot) const {
loader_.connect(slot);
}
///
void startLoading() const {
if (loader_.status() == lyx::graphics::WaitingToLoad)
loader_.startLoading();
}
private:
/** Make the c-tor private so we can control how many objects
* are instantiated.
*/
SplashScreen();
///
lyx::graphics::Loader loader_;
/// The text to be written on top of the pixmap
string const text_;
/// in this font...
LyXFont font_;
};
SplashScreen const & SplashScreen::get()
{
static SplashScreen singleton;
return singleton;
}
SplashScreen::SplashScreen()
: text_(lyx_version ? lyx_version : "unknown")
{
if (!lyxrc.show_banner)
return;
string const file = LibFileSearch("images", "banner", "ppm");
if (file.empty())
return;
// The font used to display the version info
font_.setFamily(LyXFont::SANS_FAMILY);
font_.setSeries(LyXFont::BOLD_SERIES);
font_.setSize(LyXFont::SIZE_NORMAL);
font_.setColor(LColor::yellow);
// Load up the graphics file
loader_.reset(file);
}
} // namespace anon
LyXScreen::LyXScreen()
: cursor_visible_(false), greyed_out_(true)
{
// Start loading the pixmap as soon as possible
if (lyxrc.show_banner) {
SplashScreen const & splash = SplashScreen::get();
splash.connect(boost::bind(&LyXScreen::greyOut, this));
splash.startLoading();
}
}
LyXScreen::~LyXScreen()
{
}
void LyXScreen::showCursor(BufferView & bv)
{
// this is needed to make sure we copy back the right
// pixmap on the hide for the Qt frontend
lyx_gui::sync_events();
if (cursor_visible_)
return;
if (!bv.available())
return;
Cursor_Shape shape = BAR_SHAPE;
LyXText const & text = *bv.getLyXText();
LyXFont const & realfont = text.real_current_font;
BufferParams const & bp = bv.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;
int ascent = font_metrics::maxAscent(realfont);
int descent = font_metrics::maxDescent(realfont);
int h = ascent + descent;
int x = 0;
int y = 0;
bv.cursor().getPos(x, y);
y -= ascent + bv.top_y();
//lyxerr << "LyXScreen::showCursor x: " << x << " y: " << y << endl;
// if it doesn't fit entirely on the screen, don't try to show it
if (y < 0 || y + h > workarea().workHeight())
return;
cursor_visible_ = true;
showCursor(x, y, h, shape);
}
void LyXScreen::hideCursor()
{
if (!cursor_visible_)
return;
cursor_visible_ = false;
removeCursor();
}
void LyXScreen::toggleCursor(BufferView & bv)
{
if (cursor_visible_)
hideCursor();
else
showCursor(bv);
}
bool LyXScreen::fitCursor(BufferView * bv)
{
int const top_y = bv->top_y();
int const h = workarea().workHeight();
int newtop = top_y;
int x, y, asc, desc;
bv->cursor().getPos(x, y);
bv->cursor().getDim(asc, desc);
bool const big_row = h / 4 < asc + desc && asc + desc < h;
if (y + desc - top_y >= h) {
if (big_row)
newtop = y + desc - h;
else
newtop = y - h / 2;
} else if (top_y > max(y - asc, 0)) {
if (big_row)
newtop = y - asc;
else {
newtop = y - h / 2;
newtop = min(newtop, top_y);
}
}
newtop = max(newtop, 0);
if (newtop == top_y)
return false;
bv->top_y(newtop);
return true;
}
void LyXScreen::redraw(BufferView & bv)
{
greyed_out_ = !bv.text();
if (greyed_out_) {
greyOut();
return;
}
workarea().getPainter().start();
hideCursor();
int const y = paintText(bv);
// maybe we have to clear the screen at the bottom
int const y2 = workarea().workHeight();
if (y < y2 && !bv.text()->isInInset()) {
workarea().getPainter().fillRectangle(0, y,
workarea().workWidth(), y2 - y,
LColor::bottomarea);
}
lyxerr << "Redraw screen" << endl;
expose(0, 0, workarea().workWidth(), workarea().workHeight());
workarea().getPainter().end();
}
void LyXScreen::greyOut()
{
if (!greyed_out_)
return;
workarea().getPainter().start();
workarea().getPainter().fillRectangle(0, 0,
workarea().workWidth(),
workarea().workHeight(),
LColor::bottomarea);
// Add a splash screen to the centre of the work area
SplashScreen const & splash = SplashScreen::get();
lyx::graphics::Image const * const splash_image = splash.image();
if (splash_image) {
int const w = splash_image->getWidth();
int const h = splash_image->getHeight();
int x = (workarea().workWidth() - w) / 2;
int y = (workarea().workHeight() - h) / 2;
workarea().getPainter().image(x, y, w, h, *splash_image);
x += 260;
y += 265;
workarea().getPainter().text(x, y, splash.text(), splash.font());
}
expose(0, 0, workarea().workWidth(), workarea().workHeight());
workarea().getPainter().end();
}