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MuseScore/mscore/navigator.cpp

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//=============================================================================
// MuseScore
// Linux Music Score Editor
// $Id: navigator.cpp 5630 2012-05-15 15:07:54Z lasconic $
//
// Copyright (C) 2002-2011 Werner Schweer and others
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//=============================================================================
#include "navigator.h"
#include "musescore.h"
#include "scoreview.h"
#include "libmscore/score.h"
#include "libmscore/page.h"
#include "preferences.h"
#include "libmscore/mscore.h"
#include "libmscore/system.h"
#include "libmscore/measurebase.h"
//---------------------------------------------------------
// showNavigator
//---------------------------------------------------------
void MuseScore::showNavigator(bool visible)
{
Navigator* n = static_cast<Navigator*>(_navigator->widget());
if (n == 0 && visible) {
n = new Navigator(_navigator, this);
n->setScoreView(cv);
n->updateViewRect();
}
_navigator->setVisible(visible);
getAction("toggle-navigator")->setChecked(visible);
}
//---------------------------------------------------------
// NScrollArea
//---------------------------------------------------------
NScrollArea::NScrollArea(QWidget* w)
: QScrollArea(w)
{
setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
setMinimumHeight(40);
setLineWidth(0);
}
//---------------------------------------------------------
// resizeEvent
//---------------------------------------------------------
void NScrollArea::resizeEvent(QResizeEvent* ev)
{
if (widget() && (ev->size().height() != ev->oldSize().height())) {
widget()->resize(widget()->width(), ev->size().height());
}
QScrollArea::resizeEvent(ev);
}
//---------------------------------------------------------
// Navigator
//---------------------------------------------------------
Navigator::Navigator(NScrollArea* sa, QWidget* parent)
: QWidget(parent)
{
setAttribute(Qt::WA_NoBackground);
_score = 0;
scrollArea = sa;
_cv = 0;
recreatePixmap = false;
viewRect = QRect();
cachedWidth = -1;
setSizePolicy(QSizePolicy::Ignored, QSizePolicy::Ignored);
sa->setWidget(this);
sa->setWidgetResizable(false);
connect(&watcher, SIGNAL(finished()), SLOT(pmFinished()));
}
//---------------------------------------------------------
// resizeEvent
//---------------------------------------------------------
void Navigator::resizeEvent(QResizeEvent* ev)
{
if (ev->size().height() == ev->oldSize().height())
return;
if (_score) {
rescale();
Page* lp = _score->pages().back();
int w = int ((lp->x() + lp->width()) * matrix.m11());
if (w != cachedWidth) {
cachedWidth = w;
updateViewRect();
layoutChanged();
}
}
else
recreatePixmap = true;
}
//---------------------------------------------------------
// setScoreView
//---------------------------------------------------------
void Navigator::setScoreView(ScoreView* v)
{
if (_cv) {
disconnect(this, SIGNAL(viewRectMoved(const QRectF&)), _cv, SLOT(setViewRect(const QRectF&)));
disconnect(_cv, SIGNAL(viewRectChanged()), this, SLOT(updateViewRect()));
}
_cv = QPointer<ScoreView>(v);
if (v) {
_score = v->score();
rescale();
connect(this, SIGNAL(viewRectMoved(const QRectF&)), v, SLOT(setViewRect(const QRectF&)));
connect(_cv, SIGNAL(viewRectChanged()), this, SLOT(updateViewRect()));
updateViewRect();
layoutChanged();
rescale();
}
else {
_score = 0;
pcl.clear();
update();
}
}
//---------------------------------------------------------
// setScore
//---------------------------------------------------------
void Navigator::setScore(Score* v)
{
_cv = 0;
if (v) {
_score = v;
rescale();
setViewRect(QRect());
}
else {
_score = 0;
pcl.clear();
update();
}
}
//---------------------------------------------------------
// rescale
//---------------------------------------------------------
void Navigator::rescale()
{
if (_score->pages().isEmpty())
return;
int h = height();
Page* lp = _score->pages().back();
qreal scoreWidth = lp->x() + lp->width();
qreal scoreHeight = lp->height();
qreal m;
qreal m1 = h / scoreHeight;
int w1 = int (scoreWidth * m1);
setFixedWidth(w1);
m = m1;
matrix.setMatrix(m, matrix.m12(), matrix.m13(), matrix.m21(), m,
matrix.m23(), matrix.m31(), matrix.m32(), matrix.m33());
int n = pcl.size();
for (int i = 0; i < n; ++i)
pcl[i].matrix = matrix;
}
//---------------------------------------------------------
// updateViewRect
//---------------------------------------------------------
void Navigator::updateViewRect()
{
if (_score == 0) {
setViewRect(QRect());
return;
}
if (_cv) {
QRectF r(0.0, 0.0, _cv->width(), _cv->height());
setViewRect(_cv->toLogical(r));
}
}
//---------------------------------------------------------
// mousePressEvent
//---------------------------------------------------------
void Navigator::mousePressEvent(QMouseEvent* ev)
{
if (_cv == 0)
return;
startMove = ev->pos();
if (!viewRect.contains(startMove)) {
QPointF p = matrix.inverted().map(QPointF(ev->pos()));
QRectF r(_cv->toLogical(QRectF(0.0, 0.0, _cv->width(), _cv->height())));
double dx = p.x() - (r.x() + (r.width() * .5));
double dy = p.y() - (r.y() + (r.height() * .5));
r.translate(dx, dy);
setViewRect(r);
emit viewRectMoved(matrix.inverted().mapRect(viewRect));
update();
}
}
//---------------------------------------------------------
// mouseMoveEvent
//---------------------------------------------------------
void Navigator::mouseMoveEvent(QMouseEvent* ev)
{
QPoint delta = ev->pos() - startMove;
viewRect.translate(delta);
startMove = ev->pos();
/* if (viewRect.x() <= 0 && viewRect.width() < width())
viewRect.moveLeft(0);
else if (viewRect.right() > width() && viewRect.width() < width())
viewRect.moveRight(width());
*/
if (viewRect.width() == width())
viewRect.moveLeft(0);
else if (viewRect.width() < width()) {
if (viewRect.x() < 0)
viewRect.moveLeft(0);
else if (viewRect.right() > width())
viewRect.moveRight(width());
}
else {
if (viewRect.right() < width())
viewRect.moveRight(width());
else if (viewRect.left() > 0)
viewRect.moveLeft(0);
}
if (viewRect.height() == height())
viewRect.moveTop(0);
else if (viewRect.height() < height()) {
if (viewRect.y() < 0)
viewRect.moveTop(0);
else if (viewRect.bottom() > height())
viewRect.moveBottom(height());
}
else {
if (viewRect.bottom() < height())
viewRect.moveBottom(height());
else if (viewRect.top() > 0)
viewRect.moveTop(0);
}
emit viewRectMoved(matrix.inverted().mapRect(viewRect));
int x = delta.x() > 0 ? viewRect.x() + viewRect.width() : viewRect.x();
scrollArea->ensureVisible(x, height()/2, 0, 0);
update();
}
//---------------------------------------------------------
// setViewRect
//---------------------------------------------------------
void Navigator::setViewRect(const QRectF& _viewRect)
{
viewRect = matrix.mapRect(_viewRect).toRect();
scrollArea->ensureVisible(viewRect.x(), 0);
update();
}
//---------------------------------------------------------
// paintElement
//---------------------------------------------------------
static void paintElement(void* data, Element* e)
{
QPainter* p = static_cast<QPainter*>(data);
p->save();
// p->setPen(QPen(e->curColor()));
p->translate(e->pagePos());
e->draw(p);
p->restore();
}
//---------------------------------------------------------
// createPixmap
//---------------------------------------------------------
static void createPixmap(PageCache* pc)
{
QReadLocker locker (pc->page->score()->layoutLock());
pc->valid = false;
QRect pageRect = pc->matrix.mapRect(pc->page->bbox()).toRect();
if (pageRect.width() == 0 || pageRect.height() == 0) {
return;
}
pc->pm = QImage(pageRect.size(), QImage::Format_ARGB32_Premultiplied);
QPainter p(&pc->pm);
QColor _fgColor(Qt::white);
QColor _bgColor(Qt::darkGray);
p.setRenderHint(QPainter::Antialiasing, false);
p.setTransform(pc->matrix);
p.fillRect(pc->page->bbox(), _fgColor);
foreach(System* s, *pc->page->systems()) {
foreach(MeasureBase* m, s->measures())
m->scanElements(&p, paintElement, false);
}
pc->page->scanElements(&p, paintElement, false);
if (pc->page->score()->layoutMode() == LayoutPage) {
p.setFont(QFont("FreeSans", 400)); // !!
p.setPen(QColor(0, 0, 255, 50));
p.drawText(pc->page->bbox(), Qt::AlignCenter, QString("%1").arg(pc->page->no()+1));
}
pc->navigator->update(pageRect);
pc->valid = true;
}
//---------------------------------------------------------
// layoutChanged
//---------------------------------------------------------
void Navigator::layoutChanged()
{
if (watcher.isRunning()) {
updatePixmap.cancel();
recreatePixmap = true;
return;
}
if (_score == 0 || _score->pages().isEmpty()) {
recreatePixmap = true;
update();
return;
}
int n = _score->pages().size();
// if (n != pcl.size())
rescale();
pcl.clear();
for (int i = 0; i < n; ++i) {
PageCache pc;
pc.page = _score->pages()[i];
pc.matrix = matrix;
pc.valid = false;
pc.navigator = this;
pcl.append(pc);
}
update();
}
//---------------------------------------------------------
// pmFinished
//---------------------------------------------------------
void Navigator::pmFinished()
{
if (recreatePixmap) {
recreatePixmap = false;
layoutChanged();
}
else
update();
}
//---------------------------------------------------------
// paintEvent
//---------------------------------------------------------
void Navigator::paintEvent(QPaintEvent* ev)
{
if (watcher.isRunning())
return;
QPainter p(this);
QRect r(ev->rect());
QRegion region(r);
npcl.clear();
if (matrix.m11() != .0) {
for (int i = 0; i < pcl.size(); ++i) {
const PageCache& pc = pcl[i];
QRect rr = matrix.mapRect(pc.page->canvasBoundingRect()).toRect();
if (rr.intersects(r)) {
if (pc.valid) {
QPixmap pm = QPixmap::fromImage(pc.pm);
p.drawPixmap(rr.topLeft(), pm);
}
else {
npcl.append(&pcl[i]);
}
region -= rr;
}
}
}
foreach(QRect r, region.rects())
p.fillRect(r, Qt::gray);
if (_score && !recreatePixmap) {
QPen pen(Qt::blue, 2.0);
p.setPen(pen);
p.setBrush(QColor(0, 0, 255, 40));
p.drawRect(viewRect);
}
if (!npcl.isEmpty()) {
updatePixmap = QtConcurrent::map(npcl, createPixmap);
watcher.setFuture(updatePixmap);
}
}
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