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KShare/cropeditor/cropscene.cpp
ArsenArsen e090389201 Add usage hints
2017-07-09 21:04:21 +02:00

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#include "cropscene.hpp"
#include <QColorDialog>
#include <QDebug>
#include <QFontDialog>
#include <QGraphicsPolygonItem>
#include <QGraphicsSceneContextMenuEvent>
#include <QGraphicsView>
#include <QMenu>
#include <QTimer>
#include <cropeditor/drawing/arrowitem.hpp>
#include <cropeditor/drawing/bluritem.hpp>
#include <cropeditor/drawing/dotitem.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)
: QGraphicsScene(parent), cursorPos(0, 0), drawingSelectionMaker([] { return nullptr; }), prevButtons(Qt::NoButton),
_brush(Qt::SolidPattern), _font(settings::settings().value("font", QFont()).value<QFont>()) {
_pixmap = pixmap;
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()).toFloat());
brush().setColor(settings::settings().value("brushColor", brush().color()).value<QColor>());
brush().setStyle((Qt::BrushStyle)settings::settings().value("brushStyle", (int)Qt::SolidPattern).toInt());
addDrawingAction(menu, "Dot", [] { return new DotItem; });
addDrawingAction(menu, "Path", [] { return new PathItem; });
addDrawingAction(menu, "Blur", [] { return new BlurItem; });
addDrawingAction(menu, "Straight line", [] { return new LineItem; });
addDrawingAction(menu, "Text", [] { return new TextItem; });
addDrawingAction(menu, "Rectangle", [] { return new RectItem; });
addDrawingAction(menu, "Ellipse", [] { return new EllipseItem; });
addDrawingAction(menu, "Arrow", [] { return new ArrowItem; });
menu.addSeparator();
addDrawingAction(menu, "Eraser", [] { return new EraserItem; });
QAction *clear = menu.addAction("Clear all drawing");
connect(clear, &QAction::triggered, [&] {
auto its = items();
for (auto i : its) {
if (i != rect && i != polyItem && i->zValue() != -1) removeItem(i);
}
});
QAction *reset = menu.addAction("Reset pen selection");
connect(reset, &QAction::triggered, [&] { setDrawingSelection("None", [] { return nullptr; }); });
menu.addSeparator();
QAction *settings = new QAction;
settings->setText("Settings");
menu.addSeparator();
display = menu.addAction(drawingName);
display->setDisabled(true);
connect(settings, &QAction::triggered, [&] {
hide();
BrushPenSelection(this).exec();
show();
});
menu.addAction(settings);
QPolygonF cursorPoly;
cursorPoly << QPoint(-10, 0) //
<< QPoint(10, 0) //
<< QPoint(0, 0) //
<< QPoint(0, 10) //
<< QPoint(0, -10) //
<< QPoint(0, 0);
cursorItem = addPolygon(cursorPoly, QPen(Qt::white));
cursorItem->setZValue(3);
magnifier = addPixmap(QPixmap(110, 110));
magnifierBox = addRect(magnifier->boundingRect(), QPen(Qt::cyan));
magnifier->setZValue(3);
magnifierBox->setZValue(1.1);
magnifierBox->setParentItem(magnifier);
magnifierHint = addText("ptr: (0, 0)\nsel: (-1, -1, 0, 0)");
magnifierHint->setParentItem(magnifier);
magnifierHint->setY(magnifier->boundingRect().height());
QColor c(Qt::cyan);
c.setAlphaF(.25);
magnifierHintBox = addRect(magnifierHint->boundingRect(), Qt::NoPen, c);
magnifierHintBox->setParentItem(magnifierHint);
magnifierHintBox->setZValue(1);
magnifierHint->setZValue(1.1);
initMagnifierGrid();
updateMag();
addItem(hint);
hint->setPos(5, 5);
hint->setZValue(2);
hint->setVisible(settings::settings().value("crophint", true).toBool());
connect(menu.addAction("Set Font"), &QAction::triggered, this, &CropScene::fontAsk);
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);
QTimer::singleShot(0, [&] {
auto pf = views()[0]->mapFromGlobal(QCursor::pos());
cursorPos = QPoint(pf.x(), pf.y());
cursorItem->setPos(cursorPos);
updateMag();
});
}
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) {
this->setFocus();
drawingSelectionMaker = drawAction;
drawingSelection = drawAction();
drawingName = name;
if (drawingSelection)
if (!drawingSelection->init(this)) setDrawingSelection("None", [] { return nullptr; });
}
void CropScene::hide() {
setVisible(false);
}
void CropScene::show() {
setVisible(true);
}
void CropScene::setVisible(bool visible) {
for (auto view : views()) {
if (view->isVisible()) fullscreen |= view->isFullScreen();
view->setVisible(visible);
if (visible && fullscreen) view->showFullScreen();
}
}
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::mouseMoveEvent(QGraphicsSceneMouseEvent *e) {
QPointF delta = e->scenePos() - cursorPos;
if (e->modifiers() & Qt::ShiftModifier) {
cursorPos += delta / 2;
QCursor::setPos(views()[0]->mapToGlobal(cursorPos.toPoint()));
} else
cursorPos = e->scenePos();
hint->setVisible(!hint->sceneBoundingRect().contains(cursorPos));
cursorItem->setPos(cursorPos);
updateMag();
auto buttons = e->buttons();
if (e->modifiers() & Qt::ControlModifier && buttons == Qt::LeftButton) {
QTransform stupidThing = views()[0]->transform();
auto item = itemAt(cursorPos, stupidThing);
if (item && item != polyItem && item != rect && item->zValue() != -1) {
item->moveBy(delta.x(), delta.y());
}
return;
}
if (buttons == Qt::LeftButton || (prevButtons == Qt::NoButton && prevButtons != buttons)) {
if (drawingSelection) {
drawingSelection->mouseDragEvent(e, this);
} else {
QPointF p = cursorPos;
if (rect == nullptr) {
rect = new QGraphicsRectItem(p.x(), p.y(), 1, 1);
initPos = p;
QPen pen(Qt::NoBrush, 1);
pen.setColor(Qt::cyan);
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())));
}
}
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);
e->accept();
}
}
prevButtons = buttons;
}
void CropScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *e) {
if (drawingSelection) {
drawingSelection->mouseDragEndEvent(e, this);
delete drawingSelection;
drawingSelection = drawingSelectionMaker();
if (drawingSelection)
if (!drawingSelection->init(this)) setDrawingSelection("None", [] { return nullptr; });
} else if (settings::settings().value("quickMode", false).toBool())
done(true);
prevButtons = Qt::NoButton;
}
void CropScene::mousePressEvent(QGraphicsSceneMouseEvent *e) {
if (e->modifiers() & Qt::AltModifier) {
QTransform stupidThing = views()[0]->transform();
auto item = itemAt(cursorPos, stupidThing);
if (item && item != polyItem && item != rect && item->zValue() != -1) {
removeItem(item);
}
}
}
void CropScene::wheelEvent(QGraphicsSceneWheelEvent *event) {
int pixCnt = settings::settings().value("magnifierPixelCount", 11).toInt();
if (pixCnt % 2 == 0) pixCnt++;
if (pixCnt > 20) return;
if (event->delta() > 0 && pixCnt < 19)
settings::settings().setValue("magnifierPixelCount", pixCnt += 2);
else if (pixCnt > 1)
settings::settings().setValue("magnifierPixelCount", pixCnt -= 2);
for (auto item : gridRectsX) delete item;
gridRectsX.clear();
for (auto item : gridRectsY) delete item;
gridRectsY.clear();
initMagnifierGrid();
updateMag();
}
void CropScene::addDrawingAction(QMenu &menu, QString name, std::function<DrawItem *()> item) {
QAction *action = new QAction;
action->setText(name);
connect(action, &QAction::triggered, [this, item, name](bool) { setDrawingSelection(name, item); });
menu.addAction(action);
}
QPoint contextOffset(5, 5);
void CropScene::contextMenuEvent(QGraphicsSceneContextMenuEvent *e) {
display->setText(drawingName);
menu.exec((cursorPos + contextOffset).toPoint());
e->accept();
}
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);
}
}
void CropScene::updateMag() {
QString rectStr("(-1, -1, 0, 0)");
if (rect) {
rectStr = "(%0, %1, %2, %3)";
rectStr = rectStr.arg(rect->rect().x()).arg(rect->rect().y()).arg(rect->rect().width()).arg(rect->rect().height());
}
magnifierHint->setPlainText(QString("ptr: (%0, %1)\nsel: %2").arg(qRound(cursorPos.x())).arg(qRound(cursorPos.y())).arg(rectStr));
magnifierHintBox->setRect(magnifierHint->boundingRect());
int pixCnt = settings::settings().value("magnifierPixelCount", 11).toInt();
if (pixCnt % 2 == 0) pixCnt++;
QPointF magnifierTopLeft = cursorPos - QPointF(pixCnt / 2., pixCnt / 2.);
QPointF magnifierPos = cursorPos + QPointF(5, 5);
magnifier->setPos(magnifierPos);
magnifier->setPixmap(_pixmap.copy(magnifierTopLeft.x(), magnifierTopLeft.y(), pixCnt, pixCnt).scaled(110, 110));
QPointF bottomRight = magnifierHintBox->sceneBoundingRect().bottomRight();
if (magnifier->sceneBoundingRect().bottom() > bottomRight.y())
bottomRight.setY(magnifier->sceneBoundingRect().bottom());
if (magnifier->sceneBoundingRect().right() > bottomRight.x())
bottomRight.setX(magnifier->sceneBoundingRect().right());
if (bottomRight.x() > sceneRect().right())
magnifierPos -= QPointF(qMax(130., magnifierHintBox->boundingRect().width()), 0);
if (bottomRight.y() > sceneRect().bottom())
magnifierPos -= QPointF(0, 130 + magnifierHintBox->boundingRect().height());
magnifier->setPos(magnifierPos);
}
void CropScene::initMagnifierGrid() {
QColor c(Qt::cyan);
c.setAlphaF(.25);
int pixCnt = settings::settings().value("magnifierPixelCount", 11).toInt();
if (pixCnt % 2 == 0) pixCnt++;
for (int i = 0; i < pixCnt; i++) {
auto gridRectX = addRect(0, i * 110. / pixCnt, 110, 110. / pixCnt, QPen(Qt::black, 0.5));
auto gridRectY = addRect(i * 110. / pixCnt, 0, 110. / pixCnt, 110, QPen(Qt::black, 0.5));
gridRectX->setParentItem(magnifierBox);
gridRectY->setParentItem(magnifierBox);
gridRectX->setZValue(1);
gridRectY->setZValue(1);
gridRectsX.append(gridRectX);
gridRectsY.append(gridRectY);
if (i == (pixCnt / 2)) {
gridRectX->setBrush(c);
gridRectY->setBrush(c);
}
}
}
void CropScene::done(bool notEsc) {
if (notEsc && rect) {
hint->setVisible(false);
rect->setPen(QPen(Qt::NoPen));
magnifier->setVisible(false);
cursorItem->setVisible(false);
magnifierBox->setVisible(false);
magnifierHint->setVisible(false);
magnifierHintBox->setVisible(false);
emit closedWithRect(rect->rect().toRect());
} else
emit closedWithRect(QRect());
}
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