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OpenBoard/src/tools/UBGraphicsCompass.cpp

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/*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "tools/UBGraphicsCompass.h"
#include "domain/UBGraphicsScene.h"
#include "core/UBApplication.h"
#include "core/UBSettings.h"
#include "gui/UBResources.h"
#include "domain/UBGraphicsScene.h"
#include "board/UBBoardController.h" // TODO UB 4.x clean that dependency
#include "board/UBDrawingController.h" // TODO UB 4.x clean that dependency
#include "core/memcheck.h"
const QRect UBGraphicsCompass::sDefaultRect = QRect(0, -20, 300, 48);
const QColor UBGraphicsCompass::sLightBackgroundMiddleFillColor = QColor(0x72, 0x72, 0x72, sFillTransparency);
const QColor UBGraphicsCompass::sLightBackgroundEdgeFillColor = QColor(0xc3, 0xc3, 0xc3, sFillTransparency);
const QColor UBGraphicsCompass::sLightBackgroundDrawColor = QColor(0x33, 0x33, 0x33, sDrawTransparency);
const QColor UBGraphicsCompass::sDarkBackgroundMiddleFillColor = QColor(0xb5, 0xb5, 0xb5, sFillTransparency);
const QColor UBGraphicsCompass::sDarkBackgroundEdgeFillColor = QColor(0xdd, 0xdd, 0xdd, sFillTransparency);
const QColor UBGraphicsCompass::sDarkBackgroundDrawColor = QColor(0xff, 0xff, 0xff, sDrawTransparency);
const int UBGraphicsCompass::sMinRadius = UBGraphicsCompass::sNeedleLength + UBGraphicsCompass::sNeedleBaseLength
+ 32 + UBGraphicsCompass::sDefaultRect.height() + 32 + UBGraphicsCompass::sPencilBaseLength
+ UBGraphicsCompass::sPencilLength;
UBGraphicsCompass::UBGraphicsCompass()
: QGraphicsRectItem()
, mResizing(false)
, mRotating(false)
, mDrawing(false)
, mShowButtons(false)
, mSpanAngleInDegrees(0)
, mDrewCircle(false)
, mCloseSvgItem(0)
, mResizeSvgItem(0)
, mAntiScaleRatio(1.0)
, mDrewCenterCross(false)
{
setRect(sDefaultRect);
setFlag(QGraphicsItem::ItemIsMovable, true);
setFlag(QGraphicsItem::ItemIsSelectable, true);
setFlag(QGraphicsItem::ItemSendsGeometryChanges, true);
setAcceptsHoverEvents(true);
mCloseSvgItem = new QGraphicsSvgItem(":/images/closeTool.svg", this);
mCloseSvgItem->setVisible(false);
mCloseSvgItem->setData(UBGraphicsItemData::ItemLayerType, QVariant(UBItemLayerType::Control));
mResizeSvgItem = new QGraphicsSvgItem(":/images/resizeCompass.svg", this);
mResizeSvgItem->setVisible(false);
mResizeSvgItem->setData(UBGraphicsItemData::ItemLayerType, QVariant(UBItemLayerType::Control));
updateResizeCursor();
updateDrawCursor();
unsetCursor();
connect(UBApplication::boardController, SIGNAL(penColorChanged()), this, SLOT(penColorChanged()));
connect(UBDrawingController::drawingController(), SIGNAL(lineWidthIndexChanged(int)), this, SLOT(lineWidthChanged()));
}
UBGraphicsCompass::~UBGraphicsCompass()
{
// NOOP
}
UBItem* UBGraphicsCompass::deepCopy() const
{
UBGraphicsCompass* copy = new UBGraphicsCompass();
copy->setPos(this->pos());
copy->setRect(this->rect());
copy->setZValue(this->zValue());
copy->setTransform(this->transform());
// TODO UB 4.7 ... complete all members ?
return copy;
}
void UBGraphicsCompass::paint(QPainter *painter, const QStyleOptionGraphicsItem *styleOption, QWidget *widget)
{
Q_UNUSED(styleOption);
Q_UNUSED(widget);
mAntiScaleRatio = 1 / (UBApplication::boardController->systemScaleFactor() * UBApplication::boardController->currentZoom());
QTransform antiScaleTransform;
antiScaleTransform.scale(mAntiScaleRatio, mAntiScaleRatio);
mCloseSvgItem->setTransform(antiScaleTransform);
mCloseSvgItem->setPos(
closeButtonRect().center().x() - mCloseSvgItem->boundingRect().width() * mAntiScaleRatio / 2,
closeButtonRect().center().y() - mCloseSvgItem->boundingRect().height() * mAntiScaleRatio / 2);
mResizeSvgItem->setTransform(antiScaleTransform);
mResizeSvgItem->setPos(
resizeButtonRect().center().x() - mResizeSvgItem->boundingRect().width() * mAntiScaleRatio / 2,
resizeButtonRect().center().y() - mResizeSvgItem->boundingRect().height() * mAntiScaleRatio / 2);
painter->setPen(drawColor());
painter->drawRoundedRect(hingeRect(), 4, 4);
painter->fillPath(hingeShape(), middleFillColor());
painter->fillPath(needleShape(), middleFillColor());
painter->drawPath(needleShape());
painter->fillPath(needleBaseShape(), middleFillColor());
painter->drawPath(needleBaseShape());
QLinearGradient needleArmLinearGradient(
QPointF(rect().left() + sNeedleLength + sNeedleBaseLength, rect().center().y()),
QPointF(hingeRect().left(), rect().center().y()));
needleArmLinearGradient.setColorAt(0, edgeFillColor());
needleArmLinearGradient.setColorAt(1, middleFillColor());
painter->fillPath(needleArmShape(), needleArmLinearGradient);
painter->drawPath(needleArmShape());
QRectF hingeGripRect(rect().center().x() - 16, rect().center().y() - 16, 32, 32);
painter->drawEllipse(hingeGripRect);
if (mShowButtons)
paintAngleDisplay(painter);
QLinearGradient pencilArmLinearGradient(
QPointF(hingeRect().right(), rect().center().y()),
QPointF(rect().right() - sPencilLength - sPencilBaseLength, rect().center().y()));
pencilArmLinearGradient.setColorAt(0, middleFillColor());
pencilArmLinearGradient.setColorAt(1, edgeFillColor());
painter->fillPath(pencilArmShape(), pencilArmLinearGradient);
painter->drawPath(pencilArmShape());
if (scene()->isDarkBackground())
painter->fillPath(pencilShape(), UBApplication::boardController->penColorOnDarkBackground());
else
painter->fillPath(pencilShape(), UBApplication::boardController->penColorOnLightBackground());
painter->fillPath(pencilBaseShape(), middleFillColor());
painter->drawPath(pencilBaseShape());
if (mResizing || mRotating || mDrawing || (mShowButtons && rect().width() > sDisplayRadiusOnPencilArmMinLength))
paintRadiusDisplay(painter);
}
QVariant UBGraphicsCompass::itemChange(GraphicsItemChange change, const QVariant &value)
{
if (change == QGraphicsItem::ItemSceneChange)
{
mCloseSvgItem->setParentItem(this);
mResizeSvgItem->setParentItem(this);
}
return QGraphicsRectItem::itemChange(change, value);
}
void UBGraphicsCompass::mousePressEvent(QGraphicsSceneMouseEvent *event)
{
if (UBDrawingController::drawingController ()->stylusTool() != UBStylusTool::Selector)
return;
if (resizeButtonRect().contains(event->pos()))
{
mResizing = true;
mCloseSvgItem->setVisible(false);
event->accept();
}
else if (hingeRect().contains(event->pos()))
{
mRotating = true;
mResizeSvgItem->setVisible(false);
mCloseSvgItem->setVisible(false);
event->accept();
}
else
{
mDrawing = event->pos().x() > rect().right() - sPencilLength - sPencilBaseLength;
if (mDrawing)
{
mSpanAngleInDegrees = 0;
mSceneArcStartPoint = mapToScene(pencilPosition());
scene()->moveTo(mSceneArcStartPoint);
}
mResizeSvgItem->setVisible(false);
mCloseSvgItem->setVisible(false);
QGraphicsRectItem::mousePressEvent(event);
}
}
void UBGraphicsCompass::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
{
if (UBDrawingController::drawingController ()->stylusTool() != UBStylusTool::Selector)
return;
if (!mResizing && !mRotating && !mDrawing)
{
QGraphicsRectItem::mouseMoveEvent(event);
mDrewCenterCross = false;
}
else
{
if (mResizing)
{
QPointF delta = event->pos() - event->lastPos();
if (rect().width() + delta.x() < sMinRadius)
delta.setX(sMinRadius - rect().width());
setRect(QRectF(rect().topLeft(), QSizeF(rect().width() + delta.x(), rect().height())));
}
else
{
QLineF currentLine(needlePosition(), event->pos());
QLineF lastLine(needlePosition(), event->lastPos());
qreal deltaAngle = currentLine.angleTo(lastLine);
if (deltaAngle > 180)
deltaAngle -= 360;
else if (deltaAngle < -180)
deltaAngle += 360;
rotateAroundNeedle(deltaAngle);
if (mDrawing)
{
mSpanAngleInDegrees += deltaAngle;
if (mSpanAngleInDegrees >= 1080)
mSpanAngleInDegrees -= 360;
else if (mSpanAngleInDegrees < -1080)
mSpanAngleInDegrees += 360;
drawArc();
}
}
event->accept();
}
}
void UBGraphicsCompass::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
{
if (UBDrawingController::drawingController ()->stylusTool() != UBStylusTool::Selector)
return;
if (mResizing)
{
mResizing = false;
event->accept();
}
else if (mRotating)
{
mRotating = false;
updateResizeCursor();
updateDrawCursor();
event->accept();
}
else if (mDrawing)
{
mDrawing = false;
updateResizeCursor();
updateDrawCursor();
event->accept();
}
else if (closeButtonRect().contains(event->pos()))
{
hide();
emit hidden();
event->accept();
}
else
{
QGraphicsRectItem::mouseReleaseEvent(event);
}
if (scene())
scene()->setModified(true);
}
void UBGraphicsCompass::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
{
if (UBDrawingController::drawingController ()->stylusTool() != UBStylusTool::Selector)
return;
mOuterCursor = cursor();
mShowButtons = shape().contains(event->pos());
mCloseSvgItem->setParentItem(this);
mResizeSvgItem->setParentItem(this);
mCloseSvgItem->setVisible(mShowButtons);
if (mShowButtons)
{
if (hingeRect().contains(event->pos()))
setCursor(rotateCursor());
else if (event->pos().x() > rect().right() - sPencilLength - sPencilBaseLength)
setCursor(drawCursor());
else if (resizeButtonRect().contains(event->pos()))
setCursor(resizeCursor());
else if (closeButtonRect().contains(event->pos()))
setCursor(closeCursor());
else
setCursor(moveCursor());
}
event->accept();
update();
}
void UBGraphicsCompass::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
{
if (UBDrawingController::drawingController ()->stylusTool() != UBStylusTool::Selector)
return;
mShowButtons = false;
mCloseSvgItem->setVisible(mShowButtons);
mResizeSvgItem->setVisible(mShowButtons);
unsetCursor();
event->accept();
update();
}
void UBGraphicsCompass::hoverMoveEvent(QGraphicsSceneHoverEvent *event)
{
if (UBDrawingController::drawingController ()->stylusTool() != UBStylusTool::Selector)
return;
mShowButtons = shape().contains(event->pos());
mCloseSvgItem->setVisible(mShowButtons);
mResizeSvgItem->setVisible(mShowButtons);
if (mShowButtons)
{
if (hingeRect().contains(event->pos()))
setCursor(rotateCursor());
else if (event->pos().x() > rect().right() - sPencilLength - sPencilBaseLength)
setCursor(drawCursor());
else if (resizeButtonRect().contains(event->pos()))
setCursor(resizeCursor());
else if (closeButtonRect().contains(event->pos()))
setCursor(closeCursor());
else
setCursor(moveCursor());
}
else
{
setCursor(mOuterCursor);
}
event->accept();
update();
}
void UBGraphicsCompass::paintAngleDisplay(QPainter *painter)
{
qreal angle = angleInDegrees();
qreal angleValue = mDrawing ? - mSpanAngleInDegrees : angle;
QString angleText = QString("%1").arg(angleValue, 0, 'f', 1) + "°";
painter->save();
painter->setFont(font());
QFontMetricsF fm(painter->font());
painter->translate(hingeRect().center());
painter->rotate(angle);
painter->drawText(
QRectF(
- fm.width(angleText) / 2,
- fm.height() / 2,
fm.width(angleText),
fm.height()),
Qt::AlignTop,
angleText);
painter->restore();
}
void UBGraphicsCompass::paintRadiusDisplay(QPainter *painter)
{
qreal radiusInCentimeters = rect().width() / (sPixelsPerMillimeter * 10);
QString format = rect().width() >= sDisplayRadiusUnitMinLength ? "%1 cm" : "%1";
QString radiusText = QString(format).arg(radiusInCentimeters, 0, 'f', 1);
bool onPencilArm = rect().width() > sDisplayRadiusOnPencilArmMinLength;
painter->save();
painter->setFont(font());
QFontMetricsF fm(painter->font());
QPointF textCenter;
if (onPencilArm)
textCenter = QPointF(rect().right() - sPencilBaseLength - sPencilLength - fm.width(radiusText) / 2 - 24 - 8, rect().center().y());
else
textCenter = QPointF((rect().left() + sNeedleLength + sNeedleBaseLength + hingeRect().left()) / 2, rect().center().y());
painter->translate(textCenter);
qreal angle = angleInDegrees();
if (angle > 180)
angle -= 360;
else if (angle < -180)
angle += 360;
if (angle <= -90 || angle > 90)
painter->rotate(180);
painter->drawText(
QRectF(
- fm.width(radiusText) / 2,
- rect().height() / 2,
fm.width(radiusText),
rect().height()),
Qt::AlignVCenter,
radiusText);
painter->restore();
}
QCursor UBGraphicsCompass::moveCursor() const
{
return Qt::SizeAllCursor;
}
QCursor UBGraphicsCompass::resizeCursor() const
{
return mResizeCursor;
}
QCursor UBGraphicsCompass::rotateCursor() const
{
return UBResources::resources()->rotateCursor;
}
QCursor UBGraphicsCompass::closeCursor() const
{
return Qt::ArrowCursor;
}
QCursor UBGraphicsCompass::drawCursor() const
{
return mDrawCursor;
}
QRectF UBGraphicsCompass::hingeRect() const
{
QRectF rotationRect(rect().width() / 2 - rect().height() / 2, 0, rect().height(), rect().height());
rotationRect.translate(rect().topLeft());
return rotationRect;
}
QRectF UBGraphicsCompass::closeButtonRect() const
{
QPixmap closePixmap(":/images/closeTool.svg");
QSizeF closeRectSize(
closePixmap.width() * mAntiScaleRatio,
closePixmap.height() * mAntiScaleRatio);
QPointF closeRectTopLeft(
sNeedleLength + sNeedleBaseLength + 4,
(rect().height() - closeRectSize.height()) / 2);
QRectF closeRect(closeRectTopLeft, closeRectSize);
closeRect.translate(rect().topLeft());
return closeRect;
}
QRectF UBGraphicsCompass::resizeButtonRect() const
{
QPixmap resizePixmap(":/images/resizeCompass.svg");
QSizeF resizeRectSize(
resizePixmap.width() * mAntiScaleRatio,
resizePixmap.height() * mAntiScaleRatio);
QPointF resizeRectTopLeft(
rect().width() - sPencilLength - sPencilBaseLength - resizeRectSize.width() - 4,
(rect().height() - resizeRectSize.height()) / 2);
QRectF resizeRect(resizeRectTopLeft, resizeRectSize);
resizeRect.translate(rect().topLeft());
return resizeRect;
}
void UBGraphicsCompass::rotateAroundNeedle(qreal angle)
{
QTransform transform;
transform.translate(needlePosition().x(), needlePosition().y());
transform.rotate(angle);
transform.translate(- needlePosition().x(), - needlePosition().y());
setTransform(transform, true);
}
void UBGraphicsCompass::drawArc()
{
if (!mDrewCenterCross)
{
paintCenterCross();
mDrewCenterCross = true;
scene()->moveTo(mSceneArcStartPoint);
}
QPointF sceneNeedlePosition = mapToScene(needlePosition());
qreal arcSpanAngle = mSpanAngleInDegrees;
if (arcSpanAngle > 360)
arcSpanAngle = 360;
else if (arcSpanAngle < -360)
arcSpanAngle = -360;
if (!mDrewCircle || (-360 != arcSpanAngle && 360 != arcSpanAngle))
{
mDrewCircle = (-360 == arcSpanAngle || 360 == arcSpanAngle);
scene()->drawArcTo(sceneNeedlePosition, arcSpanAngle);
}
}
void UBGraphicsCompass::updateResizeCursor()
{
QPixmap pix(":/images/cursors/resize.png");
qreal angle = angleInDegrees();
QTransform tr;
tr.rotate(- angle);
mResizeCursor = QCursor(pix.transformed(tr, Qt::SmoothTransformation), pix.width() / 2, pix.height() / 2);
}
void UBGraphicsCompass::updateDrawCursor()
{
QPixmap pix(":/images/cursors/drawCompass.png");
qreal angle = angleInDegrees();
QTransform tr;
tr.rotate(- angle);
mDrawCursor = QCursor(pix.transformed(tr, Qt::SmoothTransformation), pix.width() / 2, pix.height() / 2);
}
void UBGraphicsCompass::paintCenterCross()
{
QPointF needleCrossCenter = mapToScene(needlePosition());
scene()->moveTo(QPointF(needleCrossCenter.x() - 5, needleCrossCenter.y()));
scene()->drawLineTo(QPointF(needleCrossCenter.x() + 5, needleCrossCenter.y()), 1,
UBDrawingController::drawingController()->stylusTool() == UBStylusTool::Line);
scene()->moveTo(QPointF(needleCrossCenter.x(), needleCrossCenter.y() - 5));
scene()->drawLineTo(QPointF(needleCrossCenter.x(), needleCrossCenter.y() + 5), 1,
UBDrawingController::drawingController()->stylusTool() == UBStylusTool::Line);
}
QPointF UBGraphicsCompass::needlePosition() const
{
return QPointF(rect().x(), rect().y() + rect().height() / 2);
}
QPointF UBGraphicsCompass::pencilPosition() const
{
return QPointF(rect().right(), rect().center().y());
}
QPainterPath UBGraphicsCompass::shape() const
{
QPainterPath path = needleShape();
path = path.united(needleBaseShape());
path = path.united(needleArmShape());
path.addRect(hingeRect());
path = path.united(pencilArmShape());
path = path.united(pencilBaseShape());
path = path.united(pencilShape());
return path;
}
QPainterPath UBGraphicsCompass::needleShape() const
{
QPainterPath path;
path.moveTo(rect().left(), rect().center().y());
path.lineTo(rect().left() + sNeedleLength, rect().center().y() - 2);
path.lineTo(rect().left() + sNeedleLength, rect().center().y() + 2);
path.closeSubpath();
return path;
}
QPainterPath UBGraphicsCompass::needleBaseShape() const
{
QPainterPath path;
path.moveTo(rect().left() + sNeedleLength, rect().center().y() - 4);
path.arcTo(
rect().left() + sNeedleLength,
rect().center().y() - 8,
8, 8,
180, -90);
path.lineTo(rect().left() + sNeedleLength + sNeedleBaseLength, rect().center().y() - 8);
path.lineTo(rect().left() + sNeedleLength + sNeedleBaseLength, rect().center().y() + 8);
path.lineTo(rect().left() + sNeedleLength + 4, rect().center().y() + 8);
path.arcTo(
rect().left() + sNeedleLength,
rect().center().y(),
8, 8,
-90, -90);
path.closeSubpath();
return path;
}
QPainterPath UBGraphicsCompass::needleArmShape() const
{
QPainterPath path;
path.moveTo(rect().left() + sNeedleLength + sNeedleBaseLength, rect().center().y() - 8);
path.arcTo(
rect().left() + sNeedleLength + sNeedleBaseLength,
rect().center().y() - 12,
8, 8,
180, -90);
path.lineTo(hingeRect().left(), rect().center().y() - 16);
path.lineTo(hingeRect().left(), rect().center().y() + 16);
path.lineTo(rect().left() + sNeedleLength + sNeedleBaseLength + 4, rect().center().y() + 12);
path.arcTo(
rect().left() + sNeedleLength + sNeedleBaseLength,
rect().center().y() + 4,
8, 8,
-90, -90);
path.closeSubpath();
return path;
}
QPainterPath UBGraphicsCompass::hingeShape() const
{
QPainterPath path;
path.moveTo(hingeRect().left() + 4, hingeRect().top());
path.lineTo(hingeRect().right() - 4, hingeRect().top());
path.arcTo(
hingeRect().right() - 8,
hingeRect().top(),
8, 8,
90, -90);
path.lineTo(hingeRect().right(), hingeRect().bottom() - 4);
path.arcTo(
hingeRect().right() - 8,
hingeRect().bottom() - 8,
8, 8,
0, -90);
path.lineTo(hingeRect().left() + 4, hingeRect().bottom());
path.arcTo(
hingeRect().left(),
hingeRect().bottom() - 8,
8, 8,
-90, -90);
path.lineTo(hingeRect().left(), hingeRect().top() + 4);
path.arcTo(
hingeRect().left(),
hingeRect().top(),
8, 8,
-180, -90);
path.closeSubpath();
return path;
}
QPainterPath UBGraphicsCompass::pencilShape() const
{
int penWidthIndex = UBSettings::settings()->penWidthIndex();
int logicalCompassPencilWidth = penWidthIndex > 1 ? 8 : (penWidthIndex > 0 ? 4 : 2);
QPainterPath path;
path.moveTo(rect().right() - sPencilLength, rect().center().y() - logicalCompassPencilWidth / 2);
path.lineTo(rect().right() - logicalCompassPencilWidth / 2, rect().center().y() - logicalCompassPencilWidth / 2);
QRectF tipRect(rect().right() - logicalCompassPencilWidth, rect().center().y() - logicalCompassPencilWidth / 2, logicalCompassPencilWidth, logicalCompassPencilWidth);
path.arcTo(tipRect, 90, -180);
path.lineTo(rect().right() - sPencilLength, rect().center().y() + logicalCompassPencilWidth / 2);
path.closeSubpath();
return path;
}
QPainterPath UBGraphicsCompass::pencilBaseShape() const
{
QPainterPath path;
path.moveTo(rect().right() - sPencilLength - sPencilBaseLength, rect().center().y() - 8);
path.lineTo(rect().right() - sPencilLength - 4, rect().center().y() - 8);
path.arcTo(
rect().right() - sPencilLength - 8, rect().center().y() - 8,
8, 8,
90, -90);
path.lineTo(rect().right() - sPencilLength, rect().center().y() + 4);
path.arcTo(
rect().right() - sPencilLength - 8, rect().center().y(),
8, 8,
0, -90);
path.lineTo(rect().right() - sPencilLength - sPencilBaseLength, rect().center().y() + 8);
path.closeSubpath();
return path;
}
QPainterPath UBGraphicsCompass::pencilArmShape() const
{
QPainterPath path;
path.moveTo(hingeRect().right(), rect().center().y() - 16);
path.lineTo(rect().right() - sPencilLength - sPencilBaseLength - 4, rect().center().y() - 12);
path.arcTo(
rect().right() - sPencilLength - sPencilBaseLength - 8, rect().center().y() - 12,
8, 8,
90, -90);
path.lineTo(rect().right() - sPencilLength - sPencilBaseLength, rect().center().y() + 8);
path.arcTo(
rect().right() - sPencilLength - sPencilBaseLength - 8, rect().center().y() + 4,
8, 8,
0, -90);
path.lineTo(hingeRect().right(), rect().center().y() + 16);
path.closeSubpath();
return path;
}
UBGraphicsScene* UBGraphicsCompass::scene() const
{
return static_cast<UBGraphicsScene*>(QGraphicsRectItem::scene());
}
QColor UBGraphicsCompass::drawColor() const
{
return scene()->isDarkBackground() ? sDarkBackgroundDrawColor : sLightBackgroundDrawColor;
}
QColor UBGraphicsCompass::middleFillColor() const
{
return scene()->isDarkBackground() ? sDarkBackgroundMiddleFillColor : sLightBackgroundMiddleFillColor;
}
QColor UBGraphicsCompass::edgeFillColor() const
{
return scene()->isDarkBackground() ? sDarkBackgroundEdgeFillColor : sLightBackgroundEdgeFillColor;
}
QFont UBGraphicsCompass::font() const
{
QFont font("Arial");
font.setPixelSize(16);
font.setBold(true);
return font;
}
qreal UBGraphicsCompass::angleInDegrees() const
{
QRectF itemRect = boundingRect();
QTransform itemTransform = sceneTransform();
QPointF topLeft = itemTransform.map(itemRect.topLeft());
QPointF topRight = itemTransform.map(itemRect.topRight());
QLineF topLine(topLeft, topRight);
return topLine.angle();
}
void UBGraphicsCompass::penColorChanged()
{
QRect pencilRect(rect().right() - sPencilLength, rect().top(), sPencilLength, rect().height());
update(pencilRect);
}
void UBGraphicsCompass::lineWidthChanged()
{
QRect pencilRect(rect().right() - sPencilLength, rect().top(), sPencilLength, rect().height());
update(pencilRect);
}