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Library renamed to Pdf4Qt

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Jakub Melka
2020-12-20 19:03:58 +01:00
parent 6811820e1a
commit 7614ab8240
506 changed files with 1191 additions and 1081 deletions
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7
Pdf4QtViewerPlugins/DimensionsPlugin/DimensionsPlugin.json Normal file
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{
"Name" : "Dimensions",
"Author" : "Jakub Melka",
"Version" : "1.0.0",
"License" : "LGPL v3",
"Description" : "Measure distances, area, perimeter in a document page."
}

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Pdf4QtViewerPlugins/DimensionsPlugin/DimensionsPlugin.pro Normal file
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# Copyright (C) 2020 Jakub Melka
#
# This file is part of Pdf4Qt.
#
# Pdf4Qt is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Pdf4Qt 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 Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Pdf4Qt. If not, see <https://www.gnu.org/licenses/>.
TEMPLATE = lib
DEFINES += DIMENSIONPLUGIN_LIBRARY
QT += gui widgets
LIBS += -L$$OUT_PWD/../..
LIBS += -lPdf4QtLib
QMAKE_CXXFLAGS += /std:c++latest /utf-8
INCLUDEPATH += $$PWD/../../Pdf4QtLib/Sources
DESTDIR = $$OUT_PWD/../../pdfplugins
CONFIG += c++11
SOURCES += \
dimensionsplugin.cpp \
dimensiontool.cpp \
settingsdialog.cpp
HEADERS += \
dimensionsplugin.h \
dimensiontool.h \
settingsdialog.h
CONFIG += force_debug_info
DISTFILES += \
DimensionsPlugin.json
RESOURCES += \
icons.qrc
FORMS += \
settingsdialog.ui

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374
Pdf4QtViewerPlugins/DimensionsPlugin/dimensionsplugin.cpp Normal file
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// Copyright (C) 2020 Jakub Melka
//
// This file is part of Pdf4Qt.
//
// Pdf4Qt is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Pdf4Qt 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with Pdf4Qt. If not, see <https://www.gnu.org/licenses/>.
#include "dimensionsplugin.h"
#include "pdfdrawwidget.h"
#include "pdfwidgetutils.h"
#include "settingsdialog.h"
#include <QPainter>
#include <QFontMetricsF>
namespace pdfplugin
{
DimensionsPlugin::DimensionsPlugin() :
pdf::PDFPlugin(nullptr),
m_dimensionTools(),
m_showDimensionsAction(nullptr),
m_clearDimensionsAction(nullptr),
m_settingsAction(nullptr)
{
}
void DimensionsPlugin::setWidget(pdf::PDFWidget* widget)
{
Q_ASSERT(!m_widget);
BaseClass::setWidget(widget);
QAction* horizontalDimensionAction = new QAction(QIcon(":/pdfplugins/dimensiontool/linear-horizontal.svg"), tr("Horizontal Dimension"), this);
QAction* verticalDimensionAction = new QAction(QIcon(":/pdfplugins/dimensiontool/linear-vertical.svg"), tr("Vertical Dimension"), this);
QAction* linearDimensionAction = new QAction(QIcon(":/pdfplugins/dimensiontool/linear.svg"), tr("Linear Dimension"), this);
QAction* perimeterDimensionAction = new QAction(QIcon(":/pdfplugins/dimensiontool/perimeter.svg"), tr("Perimeter"), this);
QAction* rectanglePerimeterDimensionAction = new QAction(QIcon(":/pdfplugins/dimensiontool/rectangle-perimeter.svg"), tr("Rectangle Perimeter"), this);
QAction* areaDimensionAction = new QAction(QIcon(":/pdfplugins/dimensiontool/area.svg"), tr("Area"), this);
QAction* rectangleAreaDimensionAction = new QAction(QIcon(":/pdfplugins/dimensiontool/rectangle-area.svg"), tr("Rectangle Area"), this);
QAction* angleAction = new QAction(QIcon(":/pdfplugins/dimensiontool/angle.svg"), tr("Angle"), this);
horizontalDimensionAction->setObjectName("dimensiontool_LinearHorizontalAction");
verticalDimensionAction->setObjectName("dimensiontool_LinearVerticalAction");
linearDimensionAction->setObjectName("dimensiontool_LinearAction");
perimeterDimensionAction->setObjectName("dimensiontool_PerimeterAction");
rectanglePerimeterDimensionAction->setObjectName("dimensiontool_RectanglePerimeterAction");
areaDimensionAction->setObjectName("dimensiontool_AreaAction");
rectangleAreaDimensionAction->setObjectName("dimensiontool_RectangleAreaAction");
angleAction->setObjectName("dimensiontool_AngleAction");
horizontalDimensionAction->setCheckable(true);
verticalDimensionAction->setCheckable(true);
linearDimensionAction->setCheckable(true);
perimeterDimensionAction->setCheckable(true);
rectanglePerimeterDimensionAction->setCheckable(true);
areaDimensionAction->setCheckable(true);
rectangleAreaDimensionAction->setCheckable(true);
angleAction->setCheckable(true);
m_dimensionTools[DimensionTool::LinearHorizontal] = new DimensionTool(DimensionTool::LinearHorizontal, widget->getDrawWidgetProxy(), horizontalDimensionAction, this);
m_dimensionTools[DimensionTool::LinearVertical] = new DimensionTool(DimensionTool::LinearVertical, widget->getDrawWidgetProxy(), verticalDimensionAction, this);
m_dimensionTools[DimensionTool::Linear] = new DimensionTool(DimensionTool::Linear, widget->getDrawWidgetProxy(), linearDimensionAction, this);
m_dimensionTools[DimensionTool::Perimeter] = new DimensionTool(DimensionTool::Perimeter, widget->getDrawWidgetProxy(), perimeterDimensionAction, this);
m_dimensionTools[DimensionTool::RectanglePerimeter] = new DimensionTool(DimensionTool::RectanglePerimeter, widget->getDrawWidgetProxy(), rectanglePerimeterDimensionAction, this);
m_dimensionTools[DimensionTool::Area] = new DimensionTool(DimensionTool::Area, widget->getDrawWidgetProxy(), areaDimensionAction, this);
m_dimensionTools[DimensionTool::RectangleArea] = new DimensionTool(DimensionTool::RectangleArea, widget->getDrawWidgetProxy(), rectangleAreaDimensionAction, this);
m_dimensionTools[DimensionTool::Angle] = new DimensionTool(DimensionTool::Angle, widget->getDrawWidgetProxy(), angleAction, this);
pdf::PDFToolManager* toolManager = widget->getToolManager();
for (DimensionTool* tool : m_dimensionTools)
{
toolManager->addTool(tool);
connect(tool, &DimensionTool::dimensionCreated, this, &DimensionsPlugin::onDimensionCreated);
}
m_showDimensionsAction = new QAction(QIcon(":/pdfplugins/dimensiontool/show-dimensions.svg"), tr("Show Dimensions"), this);
m_clearDimensionsAction = new QAction(QIcon(":/pdfplugins/dimensiontool/clear-dimensions.svg"), tr("Clear Dimensions"), this);
m_settingsAction = new QAction(QIcon(":/pdfplugins/dimensiontool/settings.svg"), tr("Settings"), this);
m_showDimensionsAction->setCheckable(true);
m_showDimensionsAction->setChecked(true);
connect(m_showDimensionsAction, &QAction::triggered, this, &DimensionsPlugin::onShowDimensionsTriggered);
connect(m_clearDimensionsAction, &QAction::triggered, this, &DimensionsPlugin::onClearDimensionsTriggered);
connect(m_settingsAction, &QAction::triggered, this, &DimensionsPlugin::onSettingsTriggered);
m_lengthUnit = DimensionUnit::getLengthUnits().front();
m_areaUnit = DimensionUnit::getAreaUnits().front();
m_angleUnit = DimensionUnit::getAngleUnits().front();
m_widget->getDrawWidgetProxy()->registerDrawInterface(this);
updateActions();
}
void DimensionsPlugin::setDocument(const pdf::PDFModifiedDocument& document)
{
BaseClass::setDocument(document);
if (document.hasReset())
{
m_dimensions.clear();
updateActions();
}
}
std::vector<QAction*> DimensionsPlugin::getActions() const
{
std::vector<QAction*> result;
for (DimensionTool* tool : m_dimensionTools)
{
if (tool)
{
result.push_back(tool->getAction());
}
}
if (!result.empty())
{
result.push_back(nullptr);
result.push_back(m_showDimensionsAction);
result.push_back(m_clearDimensionsAction);
result.push_back(m_settingsAction);
}
return result;
}
void DimensionsPlugin::drawPage(QPainter* painter,
pdf::PDFInteger pageIndex,
const pdf::PDFPrecompiledPage* compiledPage,
pdf::PDFTextLayoutGetter& layoutGetter,
const QMatrix& pagePointToDevicePointMatrix,
QList<pdf::PDFRenderError>& errors) const
{
Q_UNUSED(compiledPage);
Q_UNUSED(layoutGetter);
Q_UNUSED(errors);
if (!m_showDimensionsAction || !m_showDimensionsAction->isChecked() || m_dimensions.empty())
{
// Nothing to draw
return;
}
QLocale locale;
painter->setRenderHint(QPainter::Antialiasing, true);
for (const Dimension& dimension : m_dimensions)
{
if (pageIndex != dimension.getPageIndex())
{
continue;
}
switch (dimension.getType())
{
case Dimension::Linear:
{
QPointF p1 = pagePointToDevicePointMatrix.map(dimension.getPolygon().front());
QPointF p2 = pagePointToDevicePointMatrix.map(dimension.getPolygon().back());
// Swap so p1 is to the left of the page, before p2 (for correct determination of angle)
if (p1.x() > p2.x())
{
qSwap(p1, p2);
}
QLineF line(p1, p2);
if (qFuzzyIsNull(line.length()))
{
// If we have zero line, then do nothing
continue;
}
QLineF unitVectorLine = line.normalVector().unitVector();
QPointF unitVector = unitVectorLine.p2() - unitVectorLine.p1();
qreal extensionLineSize = pdf::PDFWidgetUtils::scaleDPI_y(painter->device(), 5);
painter->setPen(Qt::black);
painter->drawLine(line);
QLineF extensionLineLeft(p1 - unitVector * extensionLineSize, p1 + unitVector * extensionLineSize);
QLineF extensionLineRight(p2 - unitVector * extensionLineSize, p2 + unitVector * extensionLineSize);
painter->drawLine(extensionLineLeft);
painter->drawLine(extensionLineRight);
QPointF textPoint = line.center();
qreal angle = line.angle();
QFontMetricsF fontMetrics(painter->font());
QRectF textRect(-line.length() * 0.5, -fontMetrics.lineSpacing(), line.length(), fontMetrics.lineSpacing());
QString text = QString("%1 %2").arg(locale.toString(dimension.getMeasuredValue() * m_lengthUnit.scale, 'f', 2), m_lengthUnit.symbol);
painter->save();
painter->translate(textPoint);
painter->rotate(-angle);
painter->drawText(textRect, Qt::AlignCenter | Qt::TextDontClip, text);
painter->restore();
break;
}
case Dimension::Perimeter:
case Dimension::Area:
{
const bool isArea = dimension.getType() == Dimension::Type::Area;
const std::vector<QPointF>& polygon = dimension.getPolygon();
qreal lineSize = pdf::PDFWidgetUtils::scaleDPI_x(painter->device(), 1);
qreal pointSize = pdf::PDFWidgetUtils::scaleDPI_x(painter->device(), 5);
painter->save();
QPen pen(Qt::black);
pen.setWidthF(lineSize);
pen.setCosmetic(true);
QColor brushColor = Qt::black;
brushColor.setAlphaF(0.1);
painter->setPen(qMove(pen));
painter->setBrush(QBrush(brushColor, isArea ? Qt::SolidPattern : Qt::DiagCrossPattern));
painter->setMatrix(pagePointToDevicePointMatrix, true);
painter->drawPolygon(polygon.data(), int(polygon.size()), Qt::OddEvenFill);
painter->restore();
QPen penPoint(Qt::black);
penPoint.setCapStyle(Qt::RoundCap);
penPoint.setWidthF(pointSize);
painter->setPen(penPoint);
QPointF centerPoint(0, 0);
for (const QPointF& point : polygon)
{
QPointF mappedPoint = pagePointToDevicePointMatrix.map(point);
centerPoint += mappedPoint;
painter->drawPoint(mappedPoint);
}
centerPoint *= 1.0 / qreal(polygon.size());
QString text;
if (isArea)
{
text = tr("A = %1 %2").arg(locale.toString(dimension.getMeasuredValue() * m_areaUnit.scale, 'f', 2), m_areaUnit.symbol);
}
else
{
text = tr("p = %1 %2").arg(locale.toString(dimension.getMeasuredValue() * m_lengthUnit.scale, 'f', 2), m_lengthUnit.symbol);
}
painter->drawText(centerPoint, text);
break;
}
case Dimension::Angular:
{
const std::vector<QPointF>& polygon = dimension.getPolygon();
QLineF line1(pagePointToDevicePointMatrix.map(polygon[1]), pagePointToDevicePointMatrix.map(polygon.front()));
QLineF line2(pagePointToDevicePointMatrix.map(polygon[1]), pagePointToDevicePointMatrix.map(polygon.back()));
qreal lineSize = pdf::PDFWidgetUtils::scaleDPI_x(painter->device(), 1);
qreal pointSize = pdf::PDFWidgetUtils::scaleDPI_x(painter->device(), 5);
qreal maxLength = qMax(line1.length(), line2.length());
line1.setLength(maxLength);
line2.setLength(maxLength);
QPen pen(Qt::black);
pen.setWidthF(lineSize);
painter->setPen(qMove(pen));
painter->drawLine(line1);
painter->drawLine(line2);
qreal startAngle = line1.angle() * 16;
qreal angleLength = dimension.getMeasuredValue() * 16;
QRectF rect(-maxLength * 0.5, -maxLength * 0.5, maxLength, maxLength);
rect.translate(line1.p1());
painter->drawArc(rect, startAngle - angleLength, angleLength);
QPen penPoint(Qt::black);
penPoint.setCapStyle(Qt::RoundCap);
penPoint.setWidthF(pointSize);
painter->setPen(penPoint);
painter->drawPoint(line1.p1());
painter->drawPoint(line1.p2());
painter->drawPoint(line2.p2());
QMatrix textMatrix;
textMatrix.translate(line1.x1(), line1.y1());
textMatrix.rotate(-line1.angle() + dimension.getMeasuredValue() * 0.5);
QPointF textPoint = textMatrix.map(QPointF(maxLength * 0.25, 0.0));
QString text = QString("%1 %2").arg(locale.toString(dimension.getMeasuredValue() * m_angleUnit.scale, 'f', 2), m_angleUnit.symbol);
painter->drawText(textPoint, text);
break;
}
default:
Q_ASSERT(false);
break;
}
}
}
void DimensionsPlugin::onShowDimensionsTriggered()
{
updateGraphics();
}
void DimensionsPlugin::onClearDimensionsTriggered()
{
m_dimensions.clear();
updateActions();
updateGraphics();
}
void DimensionsPlugin::onSettingsTriggered()
{
SettingsDialog dialog(m_widget, m_lengthUnit, m_areaUnit, m_angleUnit);
dialog.exec();
updateGraphics();
}
void DimensionsPlugin::onDimensionCreated(Dimension dimension)
{
m_dimensions.emplace_back(qMove(dimension));
updateActions();
updateGraphics();
}
void DimensionsPlugin::updateActions()
{
if (m_showDimensionsAction)
{
m_showDimensionsAction->setEnabled(!m_dimensions.empty());
}
if (m_clearDimensionsAction)
{
m_clearDimensionsAction->setEnabled(!m_dimensions.empty());
}
}
void DimensionsPlugin::updateGraphics()
{
if (m_widget)
{
m_widget->getDrawWidget()->getWidget()->update();
}
}
}

73
Pdf4QtViewerPlugins/DimensionsPlugin/dimensionsplugin.h Normal file
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// Copyright (C) 2020 Jakub Melka
//
// This file is part of Pdf4Qt.
//
// Pdf4Qt is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Pdf4Qt 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with Pdf4Qt. If not, see <https://www.gnu.org/licenses/>.
#ifndef DIMENSIONSPLUGIN_H
#define DIMENSIONSPLUGIN_H
#include "pdfplugin.h"
#include "dimensiontool.h"
#include <QObject>
namespace pdfplugin
{
class DimensionsPlugin : public pdf::PDFPlugin, public pdf::IDocumentDrawInterface
{
Q_OBJECT
Q_PLUGIN_METADATA(IID "Pdf4Qt.DimensionsPlugin" FILE "DimensionsPlugin.json")
private:
using BaseClass = pdf::PDFPlugin;
public:
DimensionsPlugin();
virtual void setWidget(pdf::PDFWidget* widget) override;
virtual void setDocument(const pdf::PDFModifiedDocument& document) override;
virtual std::vector<QAction*> getActions() const override;
virtual void drawPage(QPainter* painter,
pdf::PDFInteger pageIndex,
const pdf::PDFPrecompiledPage* compiledPage,
pdf::PDFTextLayoutGetter& layoutGetter,
const QMatrix& pagePointToDevicePointMatrix,
QList<pdf::PDFRenderError>& errors) const override;
private:
void onShowDimensionsTriggered();
void onClearDimensionsTriggered();
void onSettingsTriggered();
void onDimensionCreated(Dimension dimension);
void updateActions();
void updateGraphics();
std::array<DimensionTool*, DimensionTool::LastStyle> m_dimensionTools;
std::vector<Dimension> m_dimensions;
QAction* m_showDimensionsAction;
QAction* m_clearDimensionsAction;
QAction* m_settingsAction;
DimensionUnit m_lengthUnit;
DimensionUnit m_areaUnit;
DimensionUnit m_angleUnit;
};
} // namespace pdfplugin
#endif // DIMENSIONSPLUGIN_H

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Pdf4QtViewerPlugins/DimensionsPlugin/dimensiontool.cpp Normal file
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// Copyright (C) 2020 Jakub Melka
//
// This file is part of Pdf4Qt.
//
// Pdf4Qt is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Pdf4Qt 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with Pdf4Qt. If not, see <https://www.gnu.org/licenses/>.
#include "dimensiontool.h"
#include "pdfwidgetutils.h"
#include "pdfdrawwidget.h"
#include <QPainter>
DimensionTool::DimensionTool(Style style, pdf::PDFDrawWidgetProxy* proxy, QAction* action, QObject* parent) :
BaseClass(proxy, action, parent),
m_style(style),
m_previewPointPixelSize(0),
m_pickTool(nullptr)
{
const bool isRectanglePicking = style == RectanglePerimeter || style == RectangleArea;
const pdf::PDFPickTool::Mode pickingMode = isRectanglePicking ? pdf::PDFPickTool::Mode::Rectangles : pdf::PDFPickTool::Mode::Points;
m_pickTool = new pdf::PDFPickTool(proxy, pickingMode, this);
addTool(m_pickTool);
connect(m_pickTool, &pdf::PDFPickTool::pointPicked, this, &DimensionTool::onPointPicked);
connect(m_pickTool, &pdf::PDFPickTool::rectanglePicked, this, &DimensionTool::onRectanglePicked);
m_previewPointPixelSize = pdf::PDFWidgetUtils::scaleDPI_x(proxy->getWidget(), 5);
}
void DimensionTool::drawPage(QPainter* painter,
pdf::PDFInteger pageIndex,
const pdf::PDFPrecompiledPage* compiledPage,
pdf::PDFTextLayoutGetter& layoutGetter,
const QMatrix& pagePointToDevicePointMatrix,
QList<pdf::PDFRenderError>& errors) const
{
Q_UNUSED(compiledPage);
Q_UNUSED(layoutGetter);
Q_UNUSED(errors);
if (m_pickTool->getPageIndex() != pageIndex)
{
// Other page, nothing to draw
return;
}
if (m_style == RectanglePerimeter || m_style == RectangleArea)
{
// Nothing to draw, picking tool is already drawing picked rectangle
return;
}
painter->setPen(Qt::black);
const std::vector<QPointF>& points = m_pickTool->getPickedPoints();
for (size_t i = 1; i < points.size(); ++i)
{
painter->drawLine(pagePointToDevicePointMatrix.map(points[i - 1]), pagePointToDevicePointMatrix.map(points[i]));
}
if (!points.empty())
{
QMatrix inverted = pagePointToDevicePointMatrix.inverted();
QPointF adjustedPoint = adjustPagePoint(inverted.map(m_pickTool->getSnappedPoint()));
painter->drawLine(pagePointToDevicePointMatrix.map(points.back()), pagePointToDevicePointMatrix.map(adjustedPoint));
}
QPen pen = painter->pen();
pen.setWidth(m_previewPointPixelSize);
pen.setCapStyle(Qt::RoundCap);
painter->setPen(pen);
for (size_t i = 0; i < points.size(); ++i)
{
painter->drawPoint(pagePointToDevicePointMatrix.map(points[i]));
}
}
void DimensionTool::onPointPicked(pdf::PDFInteger pageIndex, QPointF pagePoint)
{
Q_UNUSED(pagePoint);
if (Dimension::isComplete(getDimensionType(), m_pickTool->getPickedPoints()))
{
// Create a new dimension...
std::vector<QPointF> points = m_pickTool->getPickedPoints();
for (QPointF& point : points)
{
point = adjustPagePoint(point);
}
pdf::PDFReal measuredValue = getMeasuredValue(pageIndex, points);
emit dimensionCreated(Dimension(getDimensionType(), pageIndex, measuredValue, qMove(points)));
m_pickTool->resetTool();
}
if ((m_style == Perimeter || m_style == Area) && m_pickTool->getPickedPoints().size() == 1)
{
m_pickTool->setCustomSnapPoints(pageIndex, m_pickTool->getPickedPoints());
}
}
void DimensionTool::onRectanglePicked(pdf::PDFInteger pageIndex, QRectF pageRectangle)
{
if (pageRectangle.isEmpty())
{
return;
}
std::vector<QPointF> points = { pageRectangle.topLeft(), pageRectangle.topRight(), pageRectangle.bottomRight(), pageRectangle.bottomLeft(), pageRectangle.topLeft() };
Q_ASSERT(Dimension::isComplete(getDimensionType(), points));
pdf::PDFReal measuredValue = getMeasuredValue(pageIndex, points);
emit dimensionCreated(Dimension(getDimensionType(), pageIndex, measuredValue, qMove(points)));
}
QPointF DimensionTool::adjustPagePoint(QPointF pagePoint) const
{
switch (m_style)
{
case Style::LinearHorizontal:
{
const std::vector<QPointF>& pickedPoints = m_pickTool->getPickedPoints();
if (!pickedPoints.empty())
{
const pdf::PDFPage* page = getDocument()->getCatalog()->getPage(m_pickTool->getPageIndex());
const bool rotated = page->getPageRotation() == pdf::PageRotation::Rotate90 || page->getPageRotation() == pdf::PageRotation::Rotate270;
if (rotated)
{
pagePoint.setX(pickedPoints.front().x());
}
else
{
pagePoint.setY(pickedPoints.front().y());
}
}
break;
}
case Style::LinearVertical:
{
const std::vector<QPointF>& pickedPoints = m_pickTool->getPickedPoints();
if (!pickedPoints.empty())
{
const pdf::PDFPage* page = getDocument()->getCatalog()->getPage(m_pickTool->getPageIndex());
const bool rotated = page->getPageRotation() == pdf::PageRotation::Rotate90 || page->getPageRotation() == pdf::PageRotation::Rotate270;
if (!rotated)
{
pagePoint.setX(pickedPoints.front().x());
}
else
{
pagePoint.setY(pickedPoints.front().y());
}
}
break;
}
default:
break;
}
return pagePoint;
}
Dimension::Type DimensionTool::getDimensionType() const
{
switch (m_style)
{
case DimensionTool::LinearHorizontal:
case DimensionTool::LinearVertical:
case DimensionTool::Linear:
return Dimension::Type::Linear;
case DimensionTool::Perimeter:
case DimensionTool::RectanglePerimeter:
return Dimension::Type::Perimeter;
case DimensionTool::Area:
case DimensionTool::RectangleArea:
return Dimension::Type::Area;
case DimensionTool::Angle:
return Dimension::Type::Angular;
}
Q_ASSERT(false);
return Dimension::Type::Linear;
}
pdf::PDFReal DimensionTool::getMeasuredValue(pdf::PDFInteger pageIndex, const std::vector<QPointF>& pickedPoints) const
{
const pdf::PDFPage* page = getDocument()->getCatalog()->getPage(pageIndex);
Q_ASSERT(page);
switch (getDimensionType())
{
case Dimension::Linear:
case Dimension::Perimeter:
{
pdf::PDFReal length = 0.0;
for (size_t i = 1; i < pickedPoints.size(); ++i)
{
QPointF vector = pickedPoints[i] - pickedPoints[i - 1];
length += qSqrt(QPointF::dotProduct(vector, vector));
}
return length * page->getUserUnit();
}
case Dimension::Area:
{
pdf::PDFReal area = 0.0;
// We calculate the area using standard formula for polygons.
// We determine integral over perimeter (for each edge of the polygon).
for (size_t i = 1; i < pickedPoints.size(); ++i)
{
const QPointF& p1 = pickedPoints[i - 1];
const QPointF& p2 = pickedPoints[i];
area += p1.x() * p2.y() - p1.y() * p2.x();
}
area = qAbs(area) * 0.5;
return area * page->getUserUnit() * page->getUserUnit();
}
case Dimension::Angular:
{
Q_ASSERT(pickedPoints.size() == 3);
QLineF line1(pickedPoints[1], pickedPoints.front());
QLineF line2(pickedPoints[1], pickedPoints.back());
return line1.angleTo(line2);
}
default:
Q_ASSERT(false);
break;
}
return 0.0;
}
bool Dimension::isComplete(Type type, const std::vector<QPointF>& polygon)
{
switch (type)
{
case Dimension::Linear:
return polygon.size() == 2;
case Dimension::Perimeter:
case Dimension::Area:
return polygon.size() > 2 && polygon.front() == polygon.back();
case Dimension::Angular:
return polygon.size() == 3;
default:
Q_ASSERT(false);
break;
}
return false;
}
DimensionUnits DimensionUnit::getLengthUnits()
{
DimensionUnits units;
units.emplace_back(1.0, DimensionTool::tr("pt"));
units.emplace_back(pdf::PDF_POINT_TO_INCH, DimensionTool::tr("in"));
units.emplace_back(pdf::PDF_POINT_TO_MM, DimensionTool::tr("mm"));
units.emplace_back(pdf::PDF_POINT_TO_MM * 0.1, DimensionTool::tr("cm"));
return units;
}
DimensionUnits DimensionUnit::getAreaUnits()
{
DimensionUnits units;
units.emplace_back(1.0, DimensionTool::tr("sq. pt"));
units.emplace_back(pdf::PDF_POINT_TO_INCH * pdf::PDF_POINT_TO_INCH, DimensionTool::tr("sq. in"));
units.emplace_back(pdf::PDF_POINT_TO_MM * pdf::PDF_POINT_TO_MM, DimensionTool::tr("sq. mm"));
units.emplace_back(pdf::PDF_POINT_TO_MM * 0.1 * pdf::PDF_POINT_TO_MM * 0.1, DimensionTool::tr("sq. cm"));
return units;
}
DimensionUnits DimensionUnit::getAngleUnits()
{
DimensionUnits units;
units.emplace_back(1.0, DimensionTool::tr("°"));
units.emplace_back(qDegreesToRadians(1.0), DimensionTool::tr("rad"));
return units;
}

132
Pdf4QtViewerPlugins/DimensionsPlugin/dimensiontool.h Normal file
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// Copyright (C) 2020 Jakub Melka
//
// This file is part of Pdf4Qt.
//
// Pdf4Qt is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Pdf4Qt 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with Pdf4Qt. If not, see <https://www.gnu.org/licenses/>.
#ifndef DIMENSIONTOOL_H
#define DIMENSIONTOOL_H
#include "pdfwidgettool.h"
#include <QAction>
#include <QPolygonF>
struct DimensionUnit;
using DimensionUnits = std::vector<DimensionUnit>;
struct DimensionUnit
{
explicit inline DimensionUnit() = default;
explicit inline DimensionUnit(pdf::PDFReal scale, QString symbol) :
scale(scale),
symbol(qMove(symbol))
{
}
pdf::PDFReal scale = 1.0;
QString symbol;
static DimensionUnits getLengthUnits();
static DimensionUnits getAreaUnits();
static DimensionUnits getAngleUnits();
};
class Dimension
{
public:
enum Type
{
Linear,
Perimeter,
Area,
Angular
};
inline explicit Dimension() = default;
inline explicit Dimension(Type type, pdf::PDFInteger pageIndex, pdf::PDFReal measuredValue, std::vector<QPointF> polygon) :
m_type(type),
m_pageIndex(pageIndex),
m_measuredValue(measuredValue),
m_polygon(qMove(polygon))
{
}
Type getType() const { return m_type; }
pdf::PDFInteger getPageIndex() const { return m_pageIndex; }
pdf::PDFReal getMeasuredValue() const { return m_measuredValue; }
const std::vector<QPointF>& getPolygon() const { return m_polygon; }
/// Returns true, if definition fo given type is complete
static bool isComplete(Type type, const std::vector<QPointF>& polygon);
private:
Type m_type = Linear;
pdf::PDFInteger m_pageIndex = -1;
pdf::PDFReal m_measuredValue = 0.0;
std::vector<QPointF> m_polygon;
};
class DimensionTool : public pdf::PDFWidgetTool
{
Q_OBJECT
private:
using BaseClass = pdf::PDFWidgetTool;
public:
enum Style
{
LinearHorizontal,
LinearVertical,
Linear,
Perimeter,
RectanglePerimeter,
Area,
RectangleArea,
Angle,
LastStyle
};
explicit DimensionTool(Style style, pdf::PDFDrawWidgetProxy* proxy, QAction* action, QObject* parent);
void drawPage(QPainter* painter,
pdf::PDFInteger pageIndex,
const pdf::PDFPrecompiledPage* compiledPage,
pdf::PDFTextLayoutGetter& layoutGetter,
const QMatrix& pagePointToDevicePointMatrix,
QList<pdf::PDFRenderError>& errors) const override;
signals:
void dimensionCreated(Dimension dimension);
private:
void onPointPicked(pdf::PDFInteger pageIndex, QPointF pagePoint);
void onRectanglePicked(pdf::PDFInteger pageIndex, QRectF pageRectangle);
QPointF adjustPagePoint(QPointF pagePoint) const;
Dimension::Type getDimensionType() const;
pdf::PDFReal getMeasuredValue(pdf::PDFInteger pageIndex, const std::vector<QPointF>& pickedPoints) const;
Style m_style;
int m_previewPointPixelSize;
pdf::PDFPickTool* m_pickTool;
};
#endif // DIMENSIONTOOL_H

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Pdf4QtViewerPlugins/DimensionsPlugin/icons.qrc Normal file
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<RCC>
<qresource prefix="/pdfplugins/dimensiontool">
<file>area.svg</file>
<file>linear.svg</file>
<file>linear-horizontal.svg</file>
<file>linear-vertical.svg</file>
<file>perimeter.svg</file>
<file>clear-dimensions.svg</file>
<file>settings.svg</file>
<file>show-dimensions.svg</file>
<file>angle.svg</file>
<file>rectangle-area.svg</file>
<file>rectangle-perimeter.svg</file>
</qresource>
</RCC>

114
Pdf4QtViewerPlugins/DimensionsPlugin/linear-horizontal.svg Normal file
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xmlns:svg="http://www.w3.org/2000/svg"
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viewBox="0 0 30 30"
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inkscape:pageshadow="2"
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65
Pdf4QtViewerPlugins/DimensionsPlugin/settingsdialog.cpp Normal file
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// Copyright (C) 2020 Jakub Melka
//
// This file is part of Pdf4Qt.
//
// Pdf4Qt is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Pdf4Qt 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with Pdf4Qt. If not, see <https://www.gnu.org/licenses/>.
#include "settingsdialog.h"
#include "ui_settingsdialog.h"
#include "pdfwidgetutils.h"
SettingsDialog::SettingsDialog(QWidget* parent, DimensionUnit& lengthUnit, DimensionUnit& areaUnit, DimensionUnit& angleUnit) :
QDialog(parent),
ui(new Ui::SettingsDialog),
m_lengthUnit(lengthUnit),
m_areaUnit(areaUnit),
m_angleUnit(angleUnit)
{
ui->setupUi(this);
m_lengthUnits = DimensionUnit::getLengthUnits();
m_areaUnits = DimensionUnit::getAreaUnits();
m_angleUnits = DimensionUnit::getAngleUnits();
initComboBox(m_lengthUnits, m_lengthUnit, ui->lengthsComboBox);
initComboBox(m_areaUnits, m_areaUnit, ui->areasComboBox);
initComboBox(m_angleUnits, m_angleUnit, ui->anglesComboBox);
setMinimumSize(pdf::PDFWidgetUtils::scaleDPI(this, QSize(320, 160)));
}
SettingsDialog::~SettingsDialog()
{
delete ui;
}
void SettingsDialog::initComboBox(const DimensionUnits& units, const DimensionUnit& currentUnit, QComboBox* comboBox)
{
for (const DimensionUnit& unit : units)
{
comboBox->addItem(unit.symbol, unit.symbol);
}
comboBox->setCurrentIndex(comboBox->findText(currentUnit.symbol));
}
void SettingsDialog::accept()
{
m_lengthUnit = m_lengthUnits[ui->lengthsComboBox->currentIndex()];
m_areaUnit = m_areaUnits[ui->areasComboBox->currentIndex()];
m_angleUnit = m_angleUnits[ui->anglesComboBox->currentIndex()];
QDialog::accept();
}

58
Pdf4QtViewerPlugins/DimensionsPlugin/settingsdialog.h Normal file
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// Copyright (C) 2020 Jakub Melka
//
// This file is part of Pdf4Qt.
//
// Pdf4Qt is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Pdf4Qt 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with Pdf4Qt. If not, see <https://www.gnu.org/licenses/>.
#ifndef SETTINGSDIALOG_H
#define SETTINGSDIALOG_H
#include "dimensiontool.h"
#include <QDialog>
class QComboBox;
namespace Ui
{
class SettingsDialog;
}
class SettingsDialog : public QDialog
{
Q_OBJECT
public:
explicit SettingsDialog(QWidget* parent,
DimensionUnit& lengthUnit,
DimensionUnit& areaUnit,
DimensionUnit& angleUnit);
virtual ~SettingsDialog() override;
virtual void accept() override;
private:
Ui::SettingsDialog* ui;
void initComboBox(const DimensionUnits& units, const DimensionUnit& currentUnit, QComboBox* comboBox);
DimensionUnits m_lengthUnits;
DimensionUnits m_areaUnits;
DimensionUnits m_angleUnits;
DimensionUnit& m_lengthUnit;
DimensionUnit& m_areaUnit;
DimensionUnit& m_angleUnit;
};
#endif // SETTINGSDIALOG_H

103
Pdf4QtViewerPlugins/DimensionsPlugin/settingsdialog.ui Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>SettingsDialog</class>
<widget class="QDialog" name="SettingsDialog">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>254</width>
<height>165</height>
</rect>
</property>
<property name="windowTitle">
<string>Unit Settings</string>
</property>
<layout class="QVBoxLayout" name="verticalLayout">
<item>
<widget class="QGroupBox" name="unitsGroupBox">
<property name="title">
<string>Units</string>
</property>
<layout class="QFormLayout" name="formLayout">
<item row="0" column="0">
<widget class="QLabel" name="lengthsLabel">
<property name="text">
<string>Lengths</string>
</property>
</widget>
</item>
<item row="0" column="1">
<widget class="QComboBox" name="lengthsComboBox"/>
</item>
<item row="1" column="0">
<widget class="QLabel" name="areasLabel">
<property name="text">
<string>Areas</string>
</property>
</widget>
</item>
<item row="1" column="1">
<widget class="QComboBox" name="areasComboBox"/>
</item>
<item row="2" column="0">
<widget class="QLabel" name="anglesLabel">
<property name="text">
<string>Angles</string>
</property>
</widget>
</item>
<item row="2" column="1">
<widget class="QComboBox" name="anglesComboBox"/>
</item>
</layout>
</widget>
</item>
<item>
<widget class="QDialogButtonBox" name="buttonBox">
<property name="orientation">
<enum>Qt::Horizontal</enum>
</property>
<property name="standardButtons">
<set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
</property>
</widget>
</item>
</layout>
</widget>
<resources/>
<connections>
<connection>
<sender>buttonBox</sender>
<signal>accepted()</signal>
<receiver>SettingsDialog</receiver>
<slot>accept()</slot>
<hints>
<hint type="sourcelabel">
<x>248</x>
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</hint>
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</hint>
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<y>274</y>
</hint>
</hints>
</connection>
</connections>
</ui>

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