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Advanced snapping, basics of screenshot tool

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This commit is contained in:
Jakub Melka
2020-02-28 18:56:28 +01:00
parent 46c267e537
commit 13bfbd7095
7 changed files with 212 additions and 3 deletions
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115
PdfForQtLib/sources/pdfwidgettool.cpp
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@ -52,7 +52,7 @@ PDFWidgetTool::PDFWidgetTool(PDFDrawWidgetProxy* proxy, QAction* action, QObject
m_action(action),
m_proxy(proxy)
{
updateActions();
}
PDFWidgetTool::~PDFWidgetTool()
@ -949,7 +949,8 @@ void PDFMagnifierTool::setMagnifierSize(int magnifierSize)
PDFPickTool::PDFPickTool(PDFDrawWidgetProxy* proxy, PDFPickTool::Mode mode, QObject* parent) :
BaseClass(proxy, parent),
m_mode(mode)
m_mode(mode),
m_pageIndex(-1)
{
setCursor(Qt::BlankCursor);
m_snapper.setSnapPointPixelSize(PDFWidgetUtils::scaleDPI_x(proxy->getWidget(), 10));
@ -959,6 +960,36 @@ PDFPickTool::PDFPickTool(PDFDrawWidgetProxy* proxy, PDFPickTool::Mode mode, QObj
connect(proxy, &PDFDrawWidgetProxy::pageImageChanged, this, &PDFPickTool::buildSnapPoints);
}
void PDFPickTool::drawPage(QPainter* painter,
PDFInteger pageIndex,
const PDFPrecompiledPage* compiledPage,
PDFTextLayoutGetter& layoutGetter,
const QMatrix& pagePointToDevicePointMatrix) const
{
Q_UNUSED(compiledPage);
Q_UNUSED(layoutGetter);
// If we are picking rectangles, then draw current selection rectangle
if (m_mode == Mode::Rectangles && m_pageIndex == pageIndex && !m_pickedPoints.empty())
{
QPoint p1 = pagePointToDevicePointMatrix.map(m_pickedPoints.back()).toPoint();
QPoint p2 = m_snapper.getSnappedPoint().toPoint();
int xMin = qMin(p1.x(), p2.x());
int xMax = qMax(p1.x(), p2.x());
int yMin = qMin(p1.y(), p2.y());
int yMax = qMax(p1.y(), p2.y());
QRect selectionRectangle(xMin, yMin, xMax - xMin, yMax - yMin);
if (selectionRectangle.isValid())
{
QColor selectionColor(Qt::blue);
selectionColor.setAlphaF(0.25);
painter->fillRect(selectionRectangle, selectionColor);
}
}
}
void PDFPickTool::drawPostRendering(QPainter* painter, QRect rect) const
{
m_snapper.drawSnapPoints(painter);
@ -983,6 +1014,48 @@ void PDFPickTool::mousePressEvent(QWidget* widget, QMouseEvent* event)
{
Q_UNUSED(widget);
event->accept();
if (event->button() == Qt::LeftButton)
{
// Try to perform pick
QPointF pagePoint;
PDFInteger pageIndex = getProxy()->getPageUnderPoint(m_snapper.getSnappedPoint().toPoint(), &pagePoint);
if (pageIndex != -1 && // We have picked some point on page
(m_pageIndex == -1 || m_pageIndex == pageIndex)) // We are under current page
{
m_pageIndex = pageIndex;
m_pickedPoints.push_back(pagePoint);
m_snapper.setReferencePoint(pageIndex, pagePoint);
// Emit signal about picked point
emit pointPicked(pageIndex, pagePoint);
if (m_mode == Mode::Rectangles && m_pickedPoints.size() == 2)
{
QPointF first = m_pickedPoints.front();
QPointF second = m_pickedPoints.back();
const qreal xMin = qMin(first.x(), second.x());
const qreal xMax = qMax(first.x(), second.x());
const qreal yMin = qMin(first.y(), second.y());
const qreal yMax = qMax(first.y(), second.y());
QRectF pageRectangle(xMin, yMin, xMax - xMin, yMax - yMin);
emit rectanglePicked(pageIndex, pageRectangle);
// We must reset tool, to pick next rectangle
resetTool();
}
buildSnapPoints();
getProxy()->repaintNeeded();
}
}
else if (event->button() == Qt::RightButton)
{
// Reset tool to enable new picking (right button means reset the tool)
resetTool();
}
}
void PDFPickTool::mouseReleaseEvent(QWidget* widget, QMouseEvent* event)
@ -1012,6 +1085,22 @@ void PDFPickTool::setActiveImpl(bool active)
{
buildSnapPoints();
}
else
{
// Reset tool to reinitialize it for future use. If tool
// is activated, then it should be in initial state.
resetTool();
}
}
void PDFPickTool::resetTool()
{
m_pickedPoints.clear();
m_pageIndex = -1;
m_snapper.clearReferencePoint();
buildSnapPoints();
getProxy()->repaintNeeded();
}
void PDFPickTool::buildSnapPoints()
@ -1030,6 +1119,28 @@ PDFScreenshotTool::PDFScreenshotTool(PDFDrawWidgetProxy* proxy, QAction* action,
{
m_pickTool = new PDFPickTool(proxy, PDFPickTool::Mode::Rectangles, this);
addTool(m_pickTool);
connect(m_pickTool, &PDFPickTool::rectanglePicked, this, &PDFScreenshotTool::onRectanglePicked);
}
void PDFScreenshotTool::onRectanglePicked(PDFInteger pageIndex, QRectF pageRectangle)
{
PDFWidgetSnapshot snapshot = getProxy()->getSnapshot();
if (const PDFWidgetSnapshot::SnapshotItem* pageSnapshot = snapshot.getPageSnapshot(pageIndex))
{
QRect selectedRectangle = pageSnapshot->pageToDeviceMatrix.mapRect(pageRectangle).toRect();
if (selectedRectangle.isValid())
{
QImage image(selectedRectangle.size(), QImage::Format_RGB888);
{
QPainter painter(&image);
painter.translate(-selectedRectangle.topLeft());
getProxy()->drawPages(&painter, getProxy()->getWidget()->rect());
}
QApplication::clipboard()->setImage(image, QClipboard::Clipboard);
}
}
}
} // namespace pdf