/* * Copyright 2009-2010 Stefan Gehn * * 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 2 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 . */ #include "PhotoScene.hpp" #include "PhotoListView.hpp" #include "PhotoDraggable.hpp" #include "PhotoPage.hpp" #include "TouchEvent.hpp" #include "TrashDropWidget.hpp" #include #include #include #include #include #include #include #include #include using namespace IrTouch; // DIN-A4: 210mm × 297mm #define PAGE_BASE_WIDTH 210 #define PAGE_BASE_HEIGHT 297 #define OB_MARGIN 8 #define SB_ICON_SIZE 128 #define SB_WIDTH (OB_MARGIN + SB_ICON_SIZE + OB_MARGIN) #define TB_ICON_SIZE 48 #define TB_HEIGHT (OB_MARGIN + TB_ICON_SIZE + OB_MARGIN) static QString locateBase; static QString locateIcon(const QString &iconName) { if (locateBase.isNull()) { QDir locDir(QApplication::applicationDirPath()); if (locDir.dirName() == "debug" || locDir.dirName() == "release") { locDir.cdUp(); if (locDir.dirName() == "build") locDir.cdUp(); } locateBase = locDir.absolutePath(); } return locateBase + QDir::separator() + "icons" + QDir::separator() + iconName; } static void applyStyle(QWidget *w) { if (w->inherits("QListView")) { w->setStyleSheet("border:1px solid #332; background-color:#554; color:white;"); } else if (w->inherits("QPushButton")) { w->setStyleSheet( "QPushButton{border:1px solid #332; background-color:#554; color:white;}" \ "QPushButton:pressed{border:1px solid #666; " \ "background-color: qlineargradient(x1: 0, y1: 0, x2: 0, y2: 1, stop: 0 #dadbde, stop: 1 #f6f7fa); }"); } } static QGraphicsRectItem *createTouchDebugItem(const QRectF &rect, quint32 id) { QGraphicsRectItem *item = new QGraphicsRectItem(); item->setPen(Qt::NoPen); item->setBrush(QColor(255, 0, 0, 85)); // red rectangle for multi touch item->setData(0, id); item->setRect(rect); return item; } PhotoScene::PhotoScene(QObject *parent, const QRectF &sceneRect) : QGraphicsScene(parent), mTouchDebugGroup(0), mCurrentLeftPage(0), mCurrentRightPage(0), mTwoFingerId1(0), mTwoFingerId2(0) { setSceneRect(sceneRect); setItemIndexMethod(QGraphicsScene::NoIndex); setDisplayTouchDebug(false); //--- top-level widget in scene including grid-layout QGraphicsGridLayout *tlLayout = new QGraphicsGridLayout(); tlLayout->setContentsMargins(0, 0, 0, 0); tlLayout->setSpacing(OB_MARGIN / 2.0); QGraphicsWidget *tlWidget = new QGraphicsWidget(); tlWidget->setGeometry(sceneRect); tlWidget->setLayout(tlLayout); addItem(tlWidget); //---------------------------------------------------------------------- //--- Left sidebar PhotoListView *photoLv = new PhotoListView(); mPhotoLvProxy = addWidget(photoLv); tlLayout->addItem(mPhotoLvProxy, 1, 0); applyStyle(photoLv); photoLv->setViewMode(QListView::IconMode); photoLv->setMovement(QListView::Static); photoLv->setIconSize(QSize(SB_ICON_SIZE, SB_ICON_SIZE)); photoLv->setSpacing(OB_MARGIN/2.0); photoLv->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff); photoLv->setMaximumWidth(SB_WIDTH); QObject::connect(photoLv, SIGNAL(photoDragStarted(QPoint, QString)), this, SLOT(createDraggable(QPoint, QString))); //---------------------------------------------------------------------- //--- Central page-display mPageParent = new QGraphicsWidget(tlWidget); mPageParent->setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding); // Layout for page-display mPageLayout = new QGraphicsGridLayout(); // spacing between individual pages mPageLayout->setSpacing(0); // spacing around all pages mPageLayout->setContentsMargins(0, 0, 0, 0); mPageParent->setLayout(mPageLayout); tlLayout->addItem(mPageParent, 1, 1); //---------------------------------------------------------------------- //--- Right sidebar mRightBar = new QGraphicsWidget(tlWidget); tlLayout->addItem(mRightBar, 1, 2); // Layout for right sidebar QGraphicsLinearLayout *rightBarLayout = new QGraphicsLinearLayout(Qt::Vertical, mRightBar); rightBarLayout->setContentsMargins(0, 0, 0, 0); QPushButton *btnAddPage = new QPushButton(); applyStyle(btnAddPage); btnAddPage->setIcon(QIcon(locateIcon("page_add.png"))); btnAddPage->setIconSize(QSize(SB_ICON_SIZE, SB_ICON_SIZE)); connect(btnAddPage, SIGNAL(clicked()), this, SLOT(slotAddPage())); rightBarLayout->addItem(addWidget(btnAddPage)); // stretch to align items at the bottom of the sidebar rightBarLayout->addStretch(1); mTrashWidget = new TrashDropWidget(mRightBar); mTrashWidget->setMinimumSize(SB_ICON_SIZE, SB_ICON_SIZE); mTrashWidget->setMaximumSize(SB_ICON_SIZE, SB_ICON_SIZE); mTrashWidget->setEnabled(false); connect(this, SIGNAL(selectionChanged()), this, SLOT(slotSelectionChanged())); rightBarLayout->addItem(mTrashWidget); //---------------------------------------------------------------------- //if (!loadScene("pages.tbp")) { // Add at least two empty pages at start while (mPages.count() < 2) addPage(); } // Display page 0 and 1 showPages(0); resetTouchDebugItems(); } PhotoScene::~PhotoScene() { //saveScene("pages.tbp"); } bool PhotoScene::loadScene(const QString &fileName) { QFile sceneFile(fileName); if (!sceneFile.open(QIODevice::ReadOnly)) return false; qDebug() << "Loading scene"; QDataStream sceneDataStream(&sceneFile); int pageCount; sceneDataStream >> pageCount; while (pageCount-- > 0) { PhotoPage *page = addPage(); sceneDataStream >> *page; } qDebug() << "Loaded" << mPages.count() << "pages from" << fileName; return mPages.count() > 1; } bool PhotoScene::saveScene(const QString &fileName) { QFile sceneFile(fileName); if (!sceneFile.open(QIODevice::WriteOnly)) return false; qDebug() << "Saving scene"; QDataStream sceneDataStream(&sceneFile); // store number of pages sceneDataStream << mPages.count(); // store each page Q_FOREACH(PhotoPage *page, mPages) { sceneDataStream << *page; } qDebug() << "Saved" << mPages.count() << "pages to" << fileName; return true; } void PhotoScene::showPages(int leftPageIndex) { qDebug() << "PhotoScene::showPages(" << leftPageIndex << ")"; if (mCurrentLeftPage) mCurrentLeftPage->hide(); if (mCurrentRightPage) mCurrentRightPage->hide(); // --- if (leftPageIndex >= mPages.count()) { qWarning() << "leftPageIndex too big:" << leftPageIndex << ">=" << mPages.count(); return; } qDebug() << "displaying page " << leftPageIndex + 1 << "on left side"; mCurrentLeftPage = mPages.at(leftPageIndex); mCurrentLeftPage->show(); mPageLayout->addItem(mCurrentLeftPage, 0, 0); // --- int rightPageIndex = leftPageIndex + 1; if (rightPageIndex >= mPages.count()) { qWarning() << "rightPageIndex too big:" << rightPageIndex << ">=" << mPages.count(); return; } qDebug() << "displaying page " << rightPageIndex + 1 << "on right side"; mCurrentRightPage = mPages.at(rightPageIndex); mCurrentRightPage->show(); mPageLayout->addItem(mCurrentRightPage, 0, 1); } PhotoPage *PhotoScene::addPage() { int pageIndex = mPages.count(); qDebug() << "PhotoScene::addPage(), adding page" << pageIndex + 1; PhotoPage *page = new PhotoPage(mPageParent); // hide new pages by default, showPages() "fixes" the display accordingly page->hide(); connect(page, SIGNAL(turnPage()), this, SLOT(slotTurnPage())); connect(page, SIGNAL(destroyed(QObject*)), this, SLOT(slotPageDestroyed(QObject*))); mPages.append(page); page->setPageIndex(pageIndex, mPages.count()); if (pageIndex > 0) // korrigieren der vorigen seite { qDebug() << "Fixing page" << pageIndex << "after adding page" << pageIndex + 1; mPages.at(pageIndex - 1)->setPageIndex(pageIndex - 1, mPages.count()); } qDebug() << "PhotoScene::addPage(); END"; return page; } void PhotoScene::slotTurnPage() { PhotoPage *page = qobject_cast(sender()); Q_ASSERT(page); if (page == mCurrentLeftPage) slotPrevPage(); else if (page == mCurrentRightPage) slotNextPage(); } void PhotoScene::slotPageDestroyed(QObject *obj) { PhotoPage *page = qobject_cast(obj); Q_ASSERT(page); qDebug() << "page destroyed: " << obj; int destroyedPageIndex = mPages.indexOf(page); int currLeftPageIndex = mPages.indexOf(mCurrentLeftPage); if (page == mCurrentLeftPage) mCurrentLeftPage = 0L; else if (page == mCurrentRightPage) mCurrentRightPage = 0L; qDebug() << "Removing destroyed page" << (destroyedPageIndex+1) << "from list of pages"; mPages.removeAt(destroyedPageIndex); int pageCount = mPages.count(); // Seitenzahlen aktualisieren, inklusive der Seite vor der gerade gelöschten. for (int i = qMin(destroyedPageIndex - 1, 0); i < pageCount; i++) { mPages.at(i)->setPageIndex(i, pageCount); } // Fix page display if one of the displayed pages was removed showPages(currLeftPageIndex); } void PhotoScene::slotSelectionChanged() { mTrashWidget->setEnabled(!selectedItems().isEmpty()); } void PhotoScene::createDraggable(const QPoint &lvPos, const QString &filePath) { // Make sure we're not selecting or moving anything but the new draggable clearSelection(); const QPointF scenePos = mPhotoLvProxy->mapToScene(lvPos); // create the draggable PhotoDraggable *dr = PhotoDraggable::createDraggable(filePath, scenePos); if (!dr) // invalid filePath return; // add draggable to scene addItem(dr); // FIXME: Ugly workaround to transfer mouse-grab from listview to draggabler #if 1 // "Fake" mouse release on listview QGraphicsSceneMouseEvent emulatedReleaseEvent(QEvent::GraphicsSceneMouseRelease); emulatedReleaseEvent.setScenePos(scenePos); emulatedReleaseEvent.setPos(scenePos); emulatedReleaseEvent.setButton(Qt::LeftButton); mouseReleaseEvent(&emulatedReleaseEvent); // Hack to forward all following mouse events to this newly created draggable //mPhotoLvProxy->installSceneEventFilter(dr); // Fake mouse press on PhotoDraggable QGraphicsSceneMouseEvent emulatedPressEvent(QEvent::GraphicsSceneMousePress); emulatedPressEvent.setScenePos(scenePos); emulatedPressEvent.setPos(scenePos); emulatedPressEvent.setButton(Qt::LeftButton); emulatedPressEvent.setButtons(Qt::LeftButton); mousePressEvent(&emulatedPressEvent); #endif } void PhotoScene::slotPrevPage() { qDebug() << "PhotoScene::slotPrevPage()"; int idx = mPages.indexOf(mCurrentLeftPage); if (idx > 1) showPages(idx - 2); else qWarning() << "not enough pages to go to previous page"; } void PhotoScene::slotAddPage() { qDebug() << "PhotoScene::slotAddPage()"; PhotoPage *page = addPage(); int idx = page->pageIndex(); if ((idx % 2) == 0) // left page showPages(idx); else if (idx - 1 >= 0) // right page added showPages(idx - 1); } void PhotoScene::slotNextPage() { qDebug() << "PhotoScene::slotNextPage()"; int idx = mPages.indexOf(mCurrentRightPage); if (idx + 1 < mPages.count()) showPages(idx + 1); else qWarning() << "not enough pages to go to next page"; } void PhotoScene::mouseMoveEvent(QGraphicsSceneMouseEvent *event) { updateMouseDebugItem(event->scenePos()); QGraphicsScene::mouseMoveEvent(event); } void PhotoScene::mousePressEvent(QGraphicsSceneMouseEvent *event) { resetTouchDebugItems(); updateMouseDebugItem(event->scenePos()); QGraphicsScene::mousePressEvent(event); } void PhotoScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event) { resetTouchDebugItems(); QGraphicsScene::mouseReleaseEvent(event); } void PhotoScene::mouseDoubleClickEvent(QGraphicsSceneMouseEvent * event) { if (event->button() == Qt::LeftButton) { PhotoDraggable *pd = photoDraggableAt(event->scenePos()); if (pd) { togglePageFixation(pd, event->scenePos()); event->accept(); return; } } QGraphicsScene::mouseDoubleClickEvent(event); } bool PhotoScene::eventFilter(QObject *watched, QEvent *event) { static QGraphicsRectItem *sideDebugItem = 0; Q_UNUSED(watched); if (event->type() != IrTouch::TouchEvent::eventType()) return false; const TouchData &data = static_cast(event)->data(); //qDebug() << "Got TouchEvent with data:" << data; updateTouchDebugItems(data); //--- Select items based on touch events if (data.rects().isEmpty()) { // No touch rectangles left, clear selection clearSelection(); } else if (selectedItems().isEmpty()) { // Set selection from current touch rectangles setTouchDebugVisible(false); Q_FOREACH(const TouchRect &trect, data.rects().values()) { // For now this only selects PhotoDraggables PhotoDraggable *pd = photoDraggableAt(trect.center()); if (!pd) continue; //qDebug() << "Selecting PhotoDraggable at " << trect.center(); pd->setSelected(true); } setTouchDebugVisible(true); } //--- if (data.guessedObjectType() == "vertical-hand-side") { if (mFirstSideRect.isNull()) { mFirstSideRect = data.boundingRect(); } else { QRectF unitedRect = mFirstSideRect.united(data.boundingRect()); delete sideDebugItem; sideDebugItem = createTouchDebugItem(unitedRect, 0); sideDebugItem->setBrush(QColor(0, 200, 0, 20)); addItem(sideDebugItem); if (mCurrentLeftPage) { QRectF leftRect = mCurrentLeftPage->sceneBoundingRect(); if (unitedRect.intersected(leftRect).width() > (leftRect.width() * 0.60)) { mCurrentLeftPage->clearPage(); mFirstSideRect = QRect(); delete sideDebugItem; sideDebugItem = 0; } } if (mCurrentRightPage) { QRectF rightRect = mCurrentRightPage->sceneBoundingRect(); if (unitedRect.intersected(rightRect).width() > (rightRect.width() * 0.60)) { mCurrentRightPage->clearPage(); mFirstSideRect = QRect(); delete sideDebugItem; sideDebugItem = 0; } } } } else { mFirstSideRect = QRect(); delete sideDebugItem; sideDebugItem = 0; } //--- dual-touch scaling and rotation if (data.rects().size() == 2) { if (mTwoFingerId1 == 0 && mTwoFingerId2 == 0) { // no touch-rects remembered so far, save for following events mTwoFingerId1 = data.rects().values().at(0).id(); mTwoFingerId2 = data.rects().values().at(1).id(); mTwoFingerStamp.start(); // remember time of initial dual-touch } else if (data.rects().contains(mTwoFingerId1) && data.rects().contains(mTwoFingerId2)) { // same touch-rects were found again handleDualTouch(data.rects().value(mTwoFingerId1), data.rects().value(mTwoFingerId2)); } else { // previous touch rects not found, do nothing //mTwoFingerId1 = 0; //mTwoFingerId2 = 0; } } else { // more or less than two touches, forget everything mTwoFingerId1 = 0; mTwoFingerId2 = 0; } //--- mLastData = data; // remember touchdata for comparing current and last data event->accept(); return true; } void PhotoScene::handleDualTouch(const TouchRect &r1, const TouchRect &r2) { if (!mLastData.rects().contains(r1.id()) || !mLastData.rects().contains(r2.id())) return; const TouchRect &prev_r1 = mLastData.rects().value(r1.id()); const TouchRect &prev_r2 = mLastData.rects().value(r2.id()); // line between center of previous touchrects QLineF oldL(prev_r1.center(), prev_r2.center()); // line between center of current touchrects QLineF newL(r1.center(), r2.center()); qreal lengthDiff = qAbs(newL.length() - oldL.length()); qreal angleDiff = newL.angleTo(oldL); qreal scaleFactor = newL.length() / oldL.length(); //FIXME: photo fixation should not be mixed with rotation/scaling! if (lengthDiff < 2 && (angleDiff < 0.4 || angleDiff > 359.6)) { // almost no movement of fingers detected if (mTwoFingerStamp.isValid() && mTwoFingerStamp.elapsed() > 300) { setTouchDebugVisible(false); // find PhotoDraggable that is under both TouchRects PhotoDraggable *d1 = photoDraggableAt(r1.center()); PhotoDraggable *d2 = photoDraggableAt(r2.center()); if (d1 && (d1 == d2)) { qDebug() << "No huge touch-movement detected, toggling fixation of PhotoDraggable"; togglePageFixation(d1, r1.center()); mTwoFingerStamp = QTime(); // invalidate } setTouchDebugVisible(true); } } else { if (mTwoFingerStamp.isValid()) mTwoFingerStamp.start(); // reset "no-movement" timestamp } // Scale and rotate all currently selected items Q_FOREACH(QGraphicsItem *item, selectedItems()) { PhotoDraggable *pd = dynamic_cast (item); if (!pd) continue; pd->scaleAndRotate(scaleFactor, angleDiff); } } PhotoPage *PhotoScene::pageAt(const QPointF &scenePos) const { // Find the page at scenePos QList possiblePages = items(scenePos); Q_FOREACH(QGraphicsItem *item, possiblePages) { PhotoPage *page = dynamic_cast(item); if (page) return page; } return 0L; } PhotoDraggable *PhotoScene::photoDraggableAt(const QPointF &scenePos) { QGraphicsItem *item = itemAt(scenePos); if (!item) return 0; PhotoDraggable *dr; // check if topmost item is a photodraggable dr = dynamic_cast(item); if (dr) return dr; // do the same for the parent (happens if point is on a childitem of our photodraggable) dr = dynamic_cast(item->parentItem()); if (dr) return dr; return 0; } void PhotoScene::togglePageFixation(PhotoDraggable *pd, const QPointF &scenePos) { if (!pd) return; PhotoPage *page = pageAt(scenePos); if (!page) return; clearSelection(); if (pd->parentItem()) { page->removeDraggable(pd); pd->setEnabled(true); pd->setSelected(true); } else { page->addDraggable(pd); pd->setEnabled(false); } } static QGraphicsItem *findChildItem(const QGraphicsItem *parent, int key, const QVariant &val) { Q_FOREACH(QGraphicsItem *item, parent->childItems()) { if (item->data(key) == val) return item; } return 0L; } void PhotoScene::resetTouchDebugItems() { delete mTouchDebugGroup; mTouchDebugGroup = new QGraphicsItemGroup(0L, this); mTouchDebugGroup->setZValue(5); } void PhotoScene::updateMouseDebugItem(const QPointF &pos) { if (!mDisplayTouchDebug) return; QRectF rect(pos.x() - 8, pos.y() - 8, 16, 16); QGraphicsRectItem *debugItem = static_cast (findChildItem(mTouchDebugGroup, 0, 0)); if (!debugItem) { debugItem = createTouchDebugItem(rect, 0); debugItem->setBrush(QColor(0, 0, 255, 96)); // blue rectangle for mouse touch mTouchDebugGroup->addToGroup(debugItem); } else { debugItem->setRect(rect); } } void PhotoScene::updateTouchDebugItems(const IrTouch::TouchData &data) { if (!mDisplayTouchDebug) return; QList debugItemList = mTouchDebugGroup->childItems(); QGraphicsRectItem *debugItem = 0L; // delete debug-items whose TouchRect has disappeared Q_FOREACH(QGraphicsItem *item, debugItemList) { if (!data.rects().contains(item->data(0).toUInt())) delete item; } // Add or update debug-items for all TouchRectangles Q_FOREACH(const TouchRect &trect, data.rects().values()) { debugItem = static_cast (findChildItem(mTouchDebugGroup, 0, trect.id())); if (debugItem) debugItem->setRect(trect); else mTouchDebugGroup->addToGroup(createTouchDebugItem(trect, trect.id())); } } void PhotoScene::setTouchDebugVisible(bool b) { if (mTouchDebugGroup) mTouchDebugGroup->setVisible(b); } void PhotoScene::setDisplayTouchDebug(bool display) { mDisplayTouchDebug = display; if (!display) resetTouchDebugItems(); } #include "moc_PhotoScene.cpp"