void
TreeCanvas::update(void) {
QMutexLocker locker(&mutex);
layoutMutex.lock();
if (root != NULL) {
root->layout(*na);
BoundingBox bb = root->getBoundingBox();
int w = static_cast<int>((bb.right-bb.left+Layout::extent)*scale);
int h =
static_cast<int>(2*Layout::extent+
root->getShape()->depth()*Layout::dist_y*scale);
xtrans = -bb.left+(Layout::extent / 2);
QSize viewport_size = size();
QAbstractScrollArea* sa =
static_cast<QAbstractScrollArea*>(parentWidget()->parentWidget());
sa->horizontalScrollBar()->setRange(0,w-viewport_size.width());
sa->verticalScrollBar()->setRange(0,h-viewport_size.height());
sa->horizontalScrollBar()->setPageStep(viewport_size.width());
sa->verticalScrollBar()->setPageStep(viewport_size.height());
sa->horizontalScrollBar()->setSingleStep(Layout::extent);
sa->verticalScrollBar()->setSingleStep(Layout::extent);
}
if (autoZoom)
zoomToFit();
layoutMutex.unlock();
QWidget::update();
}
void tst_QAbstractScrollArea::setScrollBars2()
{
QAbstractScrollArea scrollArea;
scrollArea.resize(300, 300);
QScrollBar *hbar = new QScrollBar;
scrollArea.setHorizontalScrollBar(hbar);
qApp->processEvents();
QCOMPARE(scrollArea.horizontalScrollBar(), hbar);
QScrollBar *vbar = new QScrollBar;
scrollArea.setVerticalScrollBar(vbar);
qApp->processEvents();
QCOMPARE(scrollArea.verticalScrollBar(), vbar);
scrollArea.horizontalScrollBar()->setRange(0, 100);
scrollArea.verticalScrollBar()->setRange(0, 100);
scrollArea.show();
// Make sure scroll bars are not explicitly hidden by QAbstractScrollArea itself.
QVERIFY(hbar->isVisible());
QVERIFY(vbar->isVisible());
// Hide the OLD scroll bar and ensure that the NEW one is hidden.
hbar->hide();
scrollArea.setHorizontalScrollBar(new QScrollBar);
qApp->processEvents();
QVERIFY(!scrollArea.horizontalScrollBar()->isVisible());
vbar->hide();
scrollArea.setVerticalScrollBar(new QScrollBar);
qApp->processEvents();
QVERIFY(!scrollArea.verticalScrollBar()->isVisible());
scrollArea.verticalScrollBar()->show();
scrollArea.horizontalScrollBar()->show();
// Hide the NEW scroll bar and ensure that it's visible
// (because the OLD one is visible).
hbar = new QScrollBar;
hbar->hide();
scrollArea.setHorizontalScrollBar(hbar);
qApp->processEvents();
QVERIFY(hbar->isVisible());
vbar = new QScrollBar;
vbar->hide();
scrollArea.setVerticalScrollBar(vbar);
qApp->processEvents();
QVERIFY(vbar->isVisible());
vbar->setRange(0, 0);
qApp->processEvents();
QVERIFY(!vbar->isVisible());
hbar->setRange(0, 0);
qApp->processEvents();
QVERIFY(!hbar->isVisible());
}
void
TreeCanvas::resizeEvent(QResizeEvent* e) {
QAbstractScrollArea* sa =
static_cast<QAbstractScrollArea*>(parentWidget()->parentWidget());
int w = sa->horizontalScrollBar()->maximum()+e->oldSize().width();
int h = sa->verticalScrollBar()->maximum()+e->oldSize().height();
sa->horizontalScrollBar()->setRange(0,w-e->size().width());
sa->verticalScrollBar()->setRange(0,h-e->size().height());
sa->horizontalScrollBar()->setPageStep(e->size().width());
sa->verticalScrollBar()->setPageStep(e->size().height());
}
void
TreeCanvas::scroll(int i) {
QAbstractScrollArea* sa =
static_cast<QAbstractScrollArea*>(parentWidget()->parentWidget());
double p = static_cast<double>(i)/100.0;
double xdiff = static_cast<double>(targetX-sourceX)*p;
double ydiff = static_cast<double>(targetY-sourceY)*p;
sa->horizontalScrollBar()->setValue(sourceX+static_cast<int>(xdiff));
sa->verticalScrollBar()->setValue(sourceY+static_cast<int>(ydiff));
}
void
TreeCanvas::scaleTree(int scale0, int zoomx, int zoomy) {
QMutexLocker locker(&layoutMutex);
QSize viewport_size = size();
QAbstractScrollArea* sa =
static_cast<QAbstractScrollArea*>(parentWidget()->parentWidget());
if (zoomx==-1)
zoomx = viewport_size.width()/2;
if (zoomy==-1)
zoomy = viewport_size.height()/2;
int xoff = (sa->horizontalScrollBar()->value()+zoomx)/scale;
int yoff = (sa->verticalScrollBar()->value()+zoomy)/scale;
BoundingBox bb;
scale0 = std::min(std::max(scale0, LayoutConfig::minScale),
LayoutConfig::maxScale);
scale = (static_cast<double>(scale0)) / 100.0;
bb = root->getBoundingBox();
int w =
static_cast<int>((bb.right-bb.left+Layout::extent)*scale);
int h =
static_cast<int>(2*Layout::extent+
root->getShape()->depth()*Layout::dist_y*scale);
sa->horizontalScrollBar()->setRange(0,w-viewport_size.width());
sa->verticalScrollBar()->setRange(0,h-viewport_size.height());
sa->horizontalScrollBar()->setPageStep(viewport_size.width());
sa->verticalScrollBar()->setPageStep(viewport_size.height());
sa->horizontalScrollBar()->setSingleStep(Layout::extent);
sa->verticalScrollBar()->setSingleStep(Layout::extent);
xoff *= scale;
yoff *= scale;
sa->horizontalScrollBar()->setValue(xoff-zoomx);
sa->verticalScrollBar()->setValue(yoff-zoomy);
emit scaleChanged(scale0);
QWidget::update();
}
void
TreeCanvas::centerCurrentNode(void) {
QMutexLocker locker(&mutex);
int x=0;
int y=0;
VisualNode* c = currentNode;
while (c != NULL) {
x += c->getOffset();
y += Layout::dist_y;
c = c->getParent(*na);
}
x = static_cast<int>((xtrans+x)*scale); y = static_cast<int>(y*scale);
QAbstractScrollArea* sa =
static_cast<QAbstractScrollArea*>(parentWidget()->parentWidget());
x -= sa->viewport()->width() / 2;
y -= sa->viewport()->height() / 2;
sourceX = sa->horizontalScrollBar()->value();
targetX = std::max(sa->horizontalScrollBar()->minimum(), x);
targetX = std::min(sa->horizontalScrollBar()->maximum(),
targetX);
sourceY = sa->verticalScrollBar()->value();
targetY = std::max(sa->verticalScrollBar()->minimum(), y);
targetY = std::min(sa->verticalScrollBar()->maximum(),
targetY);
if (!smoothScrollAndZoom) {
sa->horizontalScrollBar()->setValue(targetX);
sa->verticalScrollBar()->setValue(targetY);
} else {
scrollTimeLine.stop();
scrollTimeLine.setFrameRange(0,100);
scrollTimeLine.setDuration(std::max(200,
std::min(1000,
std::min(std::abs(sourceX-targetX),
std::abs(sourceY-targetY)))));
scrollTimeLine.start();
}
}
// scroll by dx, dy
// return true if the widget was scrolled
bool scrollWidget(const int dx, const int dy)
{
QAbstractScrollArea *scrollArea = qobject_cast<QAbstractScrollArea*>(widget);
if (scrollArea) {
const int x = scrollArea->horizontalScrollBar()->value();
const int y = scrollArea->verticalScrollBar()->value();
scrollArea->horizontalScrollBar()->setValue(x - dx);
scrollArea->verticalScrollBar()->setValue(y - dy);
return (scrollArea->horizontalScrollBar()->value() != x
|| scrollArea->verticalScrollBar()->value() != y);
}
QWebView *webView = qobject_cast<QWebView*>(widget);
if (webView) {
QWebFrame *frame = webView->page()->mainFrame();
const QPoint position = frame->scrollPosition();
frame->setScrollPosition(position - QPoint(dx, dy));
return frame->scrollPosition() != position;
}
return false;
}
void
TreeCanvas::layoutDone(int w, int h, int scale0) {
targetW = w; targetH = h; targetScale = scale0;
QSize viewport_size = size();
QAbstractScrollArea* sa =
static_cast<QAbstractScrollArea*>(parentWidget()->parentWidget());
sa->horizontalScrollBar()->setRange(0,w-viewport_size.width());
sa->verticalScrollBar()->setRange(0,h-viewport_size.height());
if (layoutDoneTimerId == 0)
layoutDoneTimerId = startTimer(15);
}
VisualNode*
TreeCanvas::eventNode(QEvent* event) {
int x = 0;
int y = 0;
switch (event->type()) {
case QEvent::ToolTip:
{
QHelpEvent* he = static_cast<QHelpEvent*>(event);
x = he->x();
y = he->y();
break;
}
case QEvent::MouseButtonDblClick:
case QEvent::MouseButtonPress:
case QEvent::MouseButtonRelease:
case QEvent::MouseMove:
{
QMouseEvent* me = static_cast<QMouseEvent*>(event);
x = me->x();
y = me->y();
break;
}
case QEvent::ContextMenu:
{
QContextMenuEvent* ce = static_cast<QContextMenuEvent*>(event);
x = ce->x();
y = ce->y();
break;
}
default:
return NULL;
}
QAbstractScrollArea* sa =
static_cast<QAbstractScrollArea*>(parentWidget()->parentWidget());
int xoff = sa->horizontalScrollBar()->value()/scale;
int yoff = sa->verticalScrollBar()->value()/scale;
BoundingBox bb = root->getBoundingBox();
int w =
static_cast<int>((bb.right-bb.left+Layout::extent)*scale);
if (w < sa->viewport()->width())
xoff -= (sa->viewport()->width()-w)/2;
VisualNode* n;
n = root->findNode(*na,
static_cast<int>(x/scale-xtrans+xoff),
static_cast<int>((y-30)/scale+yoff));
return n;
}
void
TreeCanvas::paintEvent(QPaintEvent* event) {
QMutexLocker locker(&layoutMutex);
QPainter painter(this);
painter.setRenderHint(QPainter::Antialiasing);
QAbstractScrollArea* sa =
static_cast<QAbstractScrollArea*>(parentWidget()->parentWidget());
int xoff = sa->horizontalScrollBar()->value()/scale;
int yoff = sa->verticalScrollBar()->value()/scale;
BoundingBox bb = root->getBoundingBox();
int w =
static_cast<int>((bb.right-bb.left+Layout::extent)*scale);
if (w < sa->viewport()->width())
xoff -= (sa->viewport()->width()-w)/2;
QRect origClip = event->rect();
painter.translate(0, 30);
painter.scale(scale,scale);
painter.translate(xtrans-xoff, -yoff);
QRect clip(static_cast<int>(origClip.x()/scale-xtrans+xoff),
static_cast<int>(origClip.y()/scale+yoff),
static_cast<int>(origClip.width()/scale),
static_cast<int>(origClip.height()/scale));
DrawingCursor dc(root, *na, curBest, painter, clip, showCopies);
PreorderNodeVisitor<DrawingCursor>(dc).run();
// int nodesLayouted = 1;
// clock_t t0 = clock();
// while (v.next()) { nodesLayouted++; }
// double t = (static_cast<double>(clock()-t0) / CLOCKS_PER_SEC) * 1000.0;
// double nps = static_cast<double>(nodesLayouted) /
// (static_cast<double>(clock()-t0) / CLOCKS_PER_SEC);
// std::cout << "Drawing done. " << nodesLayouted << " nodes in "
// << t << " ms. " << nps << " nodes/s." << std::endl;
}
void ScrollAreaLayout::setGeometry ( const QRect & r ) {
QAbstractScrollArea* theChild = dynamic_cast<QAbstractScrollArea*>(theItem->widget());
//qDebug() << "--------------------------------------";
// qDebug() << " Layout geometry:" << r;
//qDebug() << " Scroll bar width: " << theChild->verticalScrollBar()->width();
// get the widget which is scrolled by the scrollarea
//QWidget* wdg = theChild->widget();
// qDebug() << "Widget sizeHint():" << wdg->objectName() << " - "<< wdg->sizeHint();
//qDebug() << "Widget size():" << wdg->objectName() << " - "<< wdg->size();
// int fh = theChild->fontMetrics().height();
//qDebug() << "Scroll area max size:" << QSize(36 * fh, 24 * fh);
int wid = theChild->sizeHint().width(); // frame width is considered!
int h = theChild->sizeHint().height(); // frame height is considered!
int xpos = 0;
int ypos = 0;
if (r.width() < wid && r.height() < h) {
// both scrollbars required
wid = r.width();
h = r.height();
} else if (r.width() < wid) {
// only horizontal scroll bar required
h += theChild->horizontalScrollBar()->sizeHint().height();
wid = r.width();
// the new y position is based on the extended height (including scroll bars)
// this leads to a lesser smoothly transition from no scroll bars to scroll bars,
// but avoids an asymmetry once the scroll bars are shown.
ypos = (r.height() - h) / 2;
if (r.height() < h) { // again both required
xpos = 0;
ypos = 0;
h = r.height();
}
} else if (r.height() < h) {
// only vertical scroll bar required
wid += theChild->verticalScrollBar()->sizeHint().width();
h = r.height();
// the new x position is based on the extended width (including scroll bars)
// this leads to a lesser smoothly transition from no scroll bars to scroll bars,
// but avoids an asymmetry once the scroll bars are shown.
xpos = (r.width() - wid) / 2;
if (r.width() < wid) { // again both required
xpos = 0;
ypos = 0;
wid = r.width();
}
} else {
xpos = (r.width() - wid) / 2;
ypos = (r.height() - h) / 2;
}
int frameWidth = 0; // !!!!
QRect newRect = QRect(xpos, ypos, wid + frameWidth, h + frameWidth);
//qDebug() << " Child geometry:" << newRect;
theChild->setGeometry(newRect);
}