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KShare/cropeditor/cropscene.cpp
ArsenArsen fcf5ac0269 Fix a few screen capture bugs for some multiconfig 
Thanks to @lclc98 we worked around a bug in Qt<5.9 and made KShare work on weird multi monitor configurations where they for example overlap, also screens are now in proper positions despite what order they are in xrandr, for example.

Thanks again to @lclc98!
2017-07-03 15:43:28 +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), 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);
magnifier = addPixmap(pixmap.copy(0, 0, 11, 11).scaled(110, 110));
magnifierBox = addRect(magnifier->boundingRect(), QPen(Qt::cyan));
magnifier->setZValue(1);
magnifierBox->setZValue(1.1);
magnifierBox->setParentItem(magnifier);
magnifierHint = addText("ptr: (0, 0)\nsel: (0, 0, 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(QPointF(0, 0));
connect(menu.addAction("Set Font"), &QAction::triggered, this, &CropScene::fontAsk);
QTimer::singleShot(0, [&] {
QPolygonF poly;
poly.append(sceneRect().topLeft());
poly.append(sceneRect().topRight());
poly.append(sceneRect().bottomRight());
poly.append(sceneRect().bottomLeft());
polyItem = new QGraphicsPolygonItem(poly);
polyItem->setBrush(QBrush(QColor(0, 0, 0, 191)));
polyItem->setPen(QPen(Qt::NoPen));
addItem(polyItem);
});
}
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(), nullptr, "Font to use");
if (ok) _font = font;
show();
}
void CropScene::mouseMoveEvent(QGraphicsSceneMouseEvent *e) {
updateMag(e->scenePos());
auto buttons = e->buttons();
if (e->modifiers() & Qt::ControlModifier && buttons == Qt::LeftButton) {
QTransform stupidThing = views()[0]->transform();
auto item = itemAt(e->scenePos(), stupidThing);
if (item && item != polyItem && item != rect && item->zValue() != -1) {
QPointF delta = e->scenePos() - e->lastScenePos();
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 = e->scenePos();
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(-0.1);
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(e->scenePos(), 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(event->scenePos());
}
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);
}
void CropScene::contextMenuEvent(QGraphicsSceneContextMenuEvent *e) {
display->setText(drawingName);
menu.exec(e->screenPos());
e->accept();
}
void CropScene::keyReleaseEvent(QKeyEvent *event) {
if (event->key() == Qt::Key_Return || event->key() == Qt::Key_Enter || event->key() == Qt::Key_Escape)
done(event->key() != Qt::Key_Escape);
}
void CropScene::updateMag(QPointF scenePos) {
QString rectStr("(0, 0, 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(scenePos.x()).arg(scenePos.y()).arg(rectStr));
magnifierHintBox->setRect(magnifierHint->boundingRect());
int pixCnt = settings::settings().value("magnifierPixelCount", 11).toInt();
if (pixCnt % 2 == 0) pixCnt++;
QPointF magnifierTopLeft = scenePos - QPointF(pixCnt / 2., pixCnt / 2.);
QPointF magnifierPos = scenePos + 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) {
rect->setPen(QPen(Qt::NoPen));
magnifier->setVisible(false);
magnifierBox->setVisible(false);
magnifierHint->setVisible(false);
magnifierHintBox->setVisible(false);
emit closedWithRect(rect->rect().toRect());
} else
emit closedWithRect(QRect());
}
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