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KShare/src/cropeditor/cropscene.cpp
ArsenArsen edc462ab6f
Add ScreenOverlaySettings for later use 
gotta leave for class now
2017-12-06 14:08:49 +01:00

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// vim: set sw=4 tw=4 :
#include "cropscene.hpp"
#include "selectionrectangle.hpp"
#include <QApplication>
#include <QColorDialog>
#include <QDebug>
#include <QFontDialog>
#include <QGraphicsPolygonItem>
#include <QGraphicsProxyWidget>
#include <QGraphicsSceneContextMenuEvent>
#include <QGraphicsView>
#include <QMenu>
#include <QMenuBar>
#include <QScreen>
#include <QTimer>
#include <cropeditor/drawing/arrowitem.hpp>
#include <cropeditor/drawing/bluritem.hpp>
#include <cropeditor/drawing/ellipseitem.hpp>
#include <cropeditor/drawing/eraseritem.hpp>
#include <cropeditor/drawing/lineitem.hpp>
#include <cropeditor/drawing/pathitem.hpp>
#include <cropeditor/drawing/rectitem.hpp>
#include <cropeditor/drawing/textitem.hpp>
#include <cropeditor/settings/brushpenselection.hpp>
#include <functional>
#include <settings.hpp>
CropScene::CropScene(QObject *parent, QPixmap pixmap)
: ScreenOverlay(pixmap, parent), drawingSelectionMaker([] { return nullptr; }), prevButtons(Qt::NoButton),
_brush(Qt::SolidPattern), _font(settings::settings().value("font", QFont()).value<QFont>()) {
pen().setColor(settings::settings().value("penColor", pen().color()).value<QColor>());
pen().setCosmetic(settings::settings().value("penCosmetic", pen().isCosmetic()).toBool());
pen().setWidthF(settings::settings().value("penWidth", pen().widthF()).toReal());
brush().setColor(settings::settings().value("brushColor", brush().color()).value<QColor>());
brush().setStyle(
static_cast<Qt::BrushStyle>(settings::settings().value("brushStyle", static_cast<int>(Qt::SolidPattern)).toInt()));
setHighlight(settings::settings().value("highlightColor", QColor(Qt::cyan)).value<QColor>());
menu = new QMenuBar;
addDrawingAction(menu, tr("Free draw"), ":/icons/pencil.png", [] { return new PathItem; });
addDrawingAction(menu, tr("Blur"), ":/icons/blur.png", [] { return new BlurItem; });
addDrawingAction(menu, tr("Straight line"), ":/icons/line.png", [] { return new LineItem; });
addDrawingAction(menu, tr("Text"), ":/icons/text.png", [] { return new TextItem; });
addDrawingAction(menu, tr("Rectangle"), ":/icons/rectangle.png", [] { return new RectItem; });
addDrawingAction(menu, tr("Ellipse"), ":/icons/circle.png", [] { return new EllipseItem; });
addDrawingAction(menu, tr("Arrow"), ":/icons/arrow.png", [] { return new ArrowItem; });
menu->addSeparator();
addDrawingAction(menu, tr("Eraser"), ":/icons/erase.png", [] { return new EraserItem; });
QAction *clear = menu->addAction("");
clear->setToolTip(tr("Clear all drawing"));
clear->setIcon(QIcon(":/icons/delete.png"));
connect(clear, &QAction::triggered, [&] {
auto its = items();
for (auto i : its) {
if (i != polyItem && i != rect && i->zValue() != -1 && i != proxyMenu && i != hint && i->zValue() != 199) {
removeItem(i);
}
}
});
addDrawingAction(menu, tr("None"), ":/icons/crop.png", [] { return nullptr; });
menu->addSeparator();
QAction *settings = menu->addAction("");
settings->setToolTip(tr("Settings"));
settings->setIcon(QIcon(":/icons/settings.png"));
connect(settings, &QAction::triggered, [&] {
hide();
BrushPenSelection(this).exec();
show();
});
menu->addSeparator();
display = menu->addAction(drawingName);
display->setDisabled(true);
QAction *fonts = menu->addAction("");
fonts->setIcon(QIcon(":/icons/fontsettings.png"));
connect(fonts, &QAction::triggered, this, &CropScene::fontAsk);
menu->addAction(fonts);
menu->addSeparator();
QAction *confirm = menu->addAction("");
confirm->setToolTip(tr("Confirm"));
confirm->setIcon(QIcon(":/icons/accept.png"));
connect(confirm, &QAction::triggered, [this] { done(true); });
menu->addAction(confirm);
QAction *cancel = menu->addAction("");
cancel->setToolTip(tr("Cancel"));
cancel->setIcon(QIcon(":/icons/cancel.png"));
connect(cancel, &QAction::triggered, [this] { done(false); });
menu->addAction(cancel);
addItem(hint);
hint->setPos(5, 5);
hint->setZValue(2);
hint->setVisible(settings::settings().value("crophint", true).toBool());
QPolygonF poly;
QRect prect = pixmap.rect();
poly.append(prect.topLeft());
poly.append(prect.topRight());
poly.append(prect.bottomRight());
poly.append(prect.bottomLeft());
polyItem = new QGraphicsPolygonItem(poly);
polyItem->setBrush(QBrush(QColor(0, 0, 0, 191)));
polyItem->setPen(QPen(Qt::NoPen));
polyItem->setZValue(1);
addItem(polyItem);
auto widget = addWidget(menu);
widget->setFlag(QGraphicsItem::ItemIsMovable, true);
widget->setZValue(100);
widget->setPos(100, 100);
proxyMenu = widget;
QTimer::singleShot(0, [&, widget] {
auto screen = QApplication::primaryScreen();
int w = screen->geometry().width();
widget->setPos(views()[0]->mapToScene(
QPoint(screen->geometry().x() + (w - widget->boundingRect().width()) / 2, screen->geometry().y() + 100)));
setGrid(settings::settings().value("gridEnabled", true).toBool());
});
}
CropScene::~CropScene() {
delete drawingSelection;
}
QPen &CropScene::pen() {
return _pen;
}
QBrush &CropScene::brush() {
return _brush;
}
QFont &CropScene::font() {
return _font;
}
void CropScene::setDrawingSelection(QString name, std::function<DrawItem *()> drawAction) {
if (drawingSelection) {
delete drawingSelection;
drawingSelection = 0;
}
this->setFocus();
drawingSelectionMaker = drawAction;
drawingSelection = drawAction();
drawingName = name;
display->setText(drawingName);
if (drawingSelection)
if (!drawingSelection->init(this)) setDrawingSelection(tr("None"), [] { return nullptr; });
menu->adjustSize();
auto screen = QApplication::primaryScreen();
int w = screen->geometry().width();
proxyMenu->setPos(views()[0]->mapToScene(
QPoint(screen->geometry().x() + (w - proxyMenu->boundingRect().width()) / 2, screen->geometry().y() + 100)));
}
QGraphicsItem *CropScene::whichItem(QPointF scenePos) {
for (auto item : items()) {
if (item->sceneBoundingRect().contains(scenePos))
if (item != polyItem && item != rect && item->zValue() != 199 && item->zValue() != -1) return item;
}
return nullptr;
}
void CropScene::fontAsk() {
hide();
bool ok = false;
QFont font = QFontDialog::getFont(&ok, this->font(), this->views()[0], "Font to use");
if (ok) _font = font;
show();
}
void CropScene::mouseMoved(QGraphicsSceneMouseEvent *e, QPointF cursorPos, QPointF delta) {
hint->setVisible(settings::settings().value("crophint").toBool() && !hint->sceneBoundingRect().contains(cursorPos));
if (rect && !drawingRect) {
// qAbs(e->scenePos().<axis>() - rect->rect().<edge>()) < 10
bool close = false;
QRectF newRect = rect->rect();
if (qAbs(e->scenePos().x() - rect->rect().right()) < 10) {
if (qAbs(e->scenePos().y() - rect->rect().bottom()) < 10) {
close = true;
views()[0]->setCursor(Qt::SizeFDiagCursor);
if (e->buttons() & Qt::LeftButton) newRect.setBottomRight(cursorPos);
} else if (qAbs(e->scenePos().y() - rect->rect().top()) < 10) {
close = true;
views()[0]->setCursor(Qt::SizeBDiagCursor);
if (e->buttons() & Qt::LeftButton) newRect.setTopRight(cursorPos);
}
} else if (qAbs(e->scenePos().x() - rect->rect().left()) < 10) {
if (qAbs(e->scenePos().y() - rect->rect().top()) < 10) {
close = true;
views()[0]->setCursor(Qt::SizeFDiagCursor);
if (e->buttons() & Qt::LeftButton) newRect.setTopLeft(cursorPos);
} else if (qAbs(e->scenePos().y() - rect->rect().bottom()) < 10) {
close = true;
views()[0]->setCursor(Qt::SizeBDiagCursor);
if (e->buttons() & Qt::LeftButton) newRect.setBottomLeft(cursorPos);
}
}
if (!close)
views()[0]->setCursor(Qt::BlankCursor);
else {
rect->setRect(newRect);
prevButtons = e->buttons();
updatePoly();
return;
}
}
auto buttons = e->buttons();
if (e->modifiers() & Qt::ControlModifier && buttons == Qt::LeftButton) {
auto item = whichItem(cursorPos);
if (item) item->moveBy(delta.x(), delta.y());
return;
}
if (buttons == Qt::LeftButton) {
if (drawingSelection) {
drawingSelection->mouseDragEvent(e, this);
} else {
QPointF p = cursorPos;
if (rect == nullptr) {
drawingRect = true;
rect = new SelectionRectangle(p.x(), p.y(), 1, 1);
initPos = p;
QPen pen(Qt::NoBrush, 1);
pen.setColor(highlight());
rect->setPen(pen);
rect->setZValue(1);
addItem(rect);
} else {
if (prevButtons == Qt::NoButton) {
initPos = p;
rect->setRect(p.x(), p.y(), 1, 1);
} else {
rect->setRect(QRect(qMin(initPos.x(), p.x()), qMin(initPos.y(), p.y()), qAbs(initPos.x() - p.x()),
qAbs(initPos.y() - p.y())));
}
}
updatePoly();
e->accept();
}
}
prevButtons = buttons;
QGraphicsScene::mouseMoveEvent(e);
}
void CropScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *e) {
drawingRect = false;
if (drawingSelection) {
drawingSelection->mouseDragEndEvent(e, this);
setDrawingSelection(drawingName, drawingSelectionMaker);
} else if (settings::settings().value("quickMode", false).toBool() && !proxyMenu->sceneBoundingRect().contains(e->scenePos()))
done(true);
prevButtons = Qt::NoButton;
if (!(e->modifiers() & Qt::ControlModifier)) QGraphicsScene::mouseReleaseEvent(e);
}
void CropScene::mousePressEvent(QGraphicsSceneMouseEvent *e) {
if (e->modifiers() & Qt::AltModifier) {
auto item = whichItem(cursorPos());
if (item && item != proxyMenu) removeItem(item);
}
if (!(e->modifiers() & Qt::ControlModifier)) QGraphicsScene::mousePressEvent(e);
}
void CropScene::addDrawingAction(QMenuBar *menu, QString name, QString icon, std::function<DrawItem *()> item) {
QAction *action = menu->addAction("");
action->setToolTip(name);
action->setIcon(QIcon(icon));
connect(action, &QAction::triggered, [this, menu, action, item, name](bool) { setDrawingSelection(name, item); });
}
void CropScene::keyReleaseEvent(QKeyEvent *event) {
if (((event->key() == Qt::Key_Return || event->key() == Qt::Key_Enter) && !drawingSelection) || event->key() == Qt::Key_Escape)
done(event->key() != Qt::Key_Escape);
else if (event->key() == Qt::Key_F1) {
bool enabled = !settings::settings().value("crophint", true).toBool();
hint->setVisible(enabled);
settings::settings().setValue("crophint", enabled);
}
if (!(event->modifiers() & Qt::ControlModifier)) QGraphicsScene::keyReleaseEvent(event);
}
void CropScene::updatePoly() {
QPolygonF poly;
QPointF theMagicWikipediaPoint(rect->rect().right(), sceneRect().bottom());
poly << sceneRect().topLeft();
poly << sceneRect().topRight();
poly << sceneRect().bottomRight();
poly << theMagicWikipediaPoint;
poly << rect->rect().bottomRight();
poly << rect->rect().topRight();
poly << rect->rect().topLeft();
poly << rect->rect().bottomLeft();
poly << rect->rect().bottomRight();
poly << theMagicWikipediaPoint;
poly << sceneRect().bottomLeft();
poly << sceneRect().topLeft();
this->polyItem->setPolygon(poly);
}
void CropScene::done(bool notEsc) {
if (notEsc && rect) {
QRectF rect2 = rect->rect();
hint->setVisible(false);
rect->setRect(QRect(-100, -100, 0, 0));
proxyMenu->setVisible(false);
hideMag();
emit closedWithRect(rect2.toRect());
} else
emit closedWithRect(QRect());
}
QString CropScene::generateHint() {
QString rectStr("(-1, -1, 0, 0)");
if (rect) {
rectStr = "(%0, %1, %2, %3)";
rectStr = rectStr.arg(qRound(rect->rect().x()))
.arg(qRound(rect->rect().y()))
.arg(qRound(rect->rect().width()))
.arg(qRound(rect->rect().height()));
}
return QString("ptr: (%0, %1)\nsel: %2").arg(qRound(cursorPos().x())).arg(qRound(cursorPos().y())).arg(rectStr);
}
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