Logo Search packages:      
Sourcecode: kdenlive version File versions  Download package

graphicsscenerectmove.cpp

/***************************************************************************
 *   copyright (C) 2008 by Marco Gittler (g.marco@freenet.de)                                 *
 *   Copyright (C) 2008 by Jean-Baptiste Mardelle (jb@kdenlive.org)        *
 *                                                                         *
 *   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, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
 ***************************************************************************/

#include "graphicsscenerectmove.h"

#include <KDebug>
#include <QGraphicsSceneMouseEvent>
#include <QGraphicsRectItem>
#include <QGraphicsSvgItem>
#include <QGraphicsView>
#include <QCursor>
#include <QTextCursor>
#include <QList>
#include <QKeyEvent>
#include <QApplication>
#include <QTextBlock>


GraphicsSceneRectMove::GraphicsSceneRectMove(QObject *parent) :
        QGraphicsScene(parent),
        m_selectedItem(NULL),
        m_resizeMode(NoResize),
        m_tool(TITLE_RECTANGLE)
{
    //grabMouse();
    m_zoom = 1.0;
    setBackgroundBrush(QBrush(Qt::transparent));
    m_fontSize = 0;
}

void GraphicsSceneRectMove::setSelectedItem(QGraphicsItem *item)
{
    clearSelection();
    m_selectedItem = item;
    item->setSelected(true);
    update();
}

TITLETOOL GraphicsSceneRectMove::tool()
{
    return m_tool;
}

void GraphicsSceneRectMove::setTool(TITLETOOL tool)
{
    m_tool = tool;
    switch (m_tool) {
    case TITLE_RECTANGLE:
        setCursor(Qt::CrossCursor);
        break;
    case TITLE_TEXT:
        setCursor(Qt::IBeamCursor);
        break;
    default:
        setCursor(Qt::ArrowCursor);
    }
}

void GraphicsSceneRectMove::keyPressEvent(QKeyEvent * keyEvent)
{
    if (m_selectedItem == NULL || !(m_selectedItem->flags() & QGraphicsItem::ItemIsMovable)) {
        QGraphicsScene::keyPressEvent(keyEvent);
        return;
    }
    int diff = 1;
    if (m_selectedItem->type() == 8) {
        QGraphicsTextItem *t = static_cast<QGraphicsTextItem *>(m_selectedItem);
        if (t->textInteractionFlags() & Qt::TextEditorInteraction) {
            QGraphicsScene::keyPressEvent(keyEvent);
            return;
        }
    }
    if (keyEvent->modifiers() & Qt::ControlModifier) diff = 10;
    switch (keyEvent->key()) {
    case Qt::Key_Left:
        m_selectedItem->setPos(m_selectedItem->pos() - QPointF(diff, 0));
        emit itemMoved();
        break;
    case Qt::Key_Right:
        m_selectedItem->setPos(m_selectedItem->pos() + QPointF(diff, 0));
        emit itemMoved();
        break;
    case Qt::Key_Up:
        m_selectedItem->setPos(m_selectedItem->pos() - QPointF(0, diff));
        emit itemMoved();
        break;
    case Qt::Key_Down:
        m_selectedItem->setPos(m_selectedItem->pos() + QPointF(0, diff));
        emit itemMoved();
        break;
    case Qt::Key_Delete:
    case Qt::Key_Backspace:
        delete m_selectedItem;
        m_selectedItem = NULL;
        emit selectionChanged();
        break;
    default:
        QGraphicsScene::keyPressEvent(keyEvent);
    }
    emit actionFinished();
}

void GraphicsSceneRectMove::mouseDoubleClickEvent(QGraphicsSceneMouseEvent* e)
{
    QPointF p = e->scenePos();
    p += QPoint(-2, -2);
    m_resizeMode = NoResize;
    m_selectedItem = NULL;

    // http://www.kdenlive.org/mantis/view.php?id=1035
    QList<QGraphicsItem*> i = items(QRectF(p , QSizeF(4, 4)).toRect());
    if (i.size() <= 0) return;

    QGraphicsItem* g = i.at(0);
    if (g) {
        if (g->type() == 8) {
            QGraphicsTextItem *t = static_cast<QGraphicsTextItem *>(g);
            m_selectedItem = g;
            t->setTextInteractionFlags(Qt::TextEditorInteraction);
        } else emit doubleClickEvent();
    }
    QGraphicsScene::mouseDoubleClickEvent(e);
}

void GraphicsSceneRectMove::mouseReleaseEvent(QGraphicsSceneMouseEvent *e)
{
    if (m_tool == TITLE_RECTANGLE && m_selectedItem) setSelectedItem(m_selectedItem);
    QGraphicsScene::mouseReleaseEvent(e);
    emit actionFinished();
}

void GraphicsSceneRectMove::mousePressEvent(QGraphicsSceneMouseEvent* e)
{
    m_clickPoint = e->screenPos();
    QPointF p = e->scenePos();
    p += QPoint(-2, -2);
    m_resizeMode = NoResize;
    const QList <QGraphicsItem *> list = items(QRectF(p , QSizeF(4, 4)).toRect());
    QGraphicsItem *item = NULL;
    bool hasSelected = false;

    if (m_tool == TITLE_SELECT) {
        foreach(QGraphicsItem *g, list) {
            kDebug() << " - - CHECKING ITEM Z:" << g->zValue() << ", TYPE: " << g->type();
            // check is there is a selected item in list
            if (g->zValue() > -1000 && g->isSelected()) {
                hasSelected = true;
                item = g;
                break;
            }
        }
        if (item == NULL  || !(item->flags() & QGraphicsItem::ItemIsSelectable)) {
            if (m_selectedItem && m_selectedItem->type() == 8) {
                // disable text editing
                QGraphicsTextItem *t = static_cast<QGraphicsTextItem *>(m_selectedItem);
                t->textCursor().setPosition(0);
                QTextBlock cur = t->textCursor().block();
                t->setTextCursor(QTextCursor(cur));
                t->setTextInteractionFlags(Qt::NoTextInteraction);
            }
            m_selectedItem = NULL;
            foreach(QGraphicsItem* g, list) {
                if (g->zValue() > -1000) {
                    item = g;
                    break;
                }
            }
        }
        if (item != NULL && item->flags() & QGraphicsItem::ItemIsMovable) {
            m_sceneClickPoint = e->scenePos();
            m_selectedItem = item;
            kDebug() << "/////////  ITEM TYPE: " << item->type();
            if (item->type() == 8) {
                QGraphicsTextItem *t = static_cast<QGraphicsTextItem *>(item);
                if (t->textInteractionFlags() == Qt::TextEditorInteraction) {
                    QGraphicsScene::mousePressEvent(e);
                    return;
                }
                t->setTextInteractionFlags(Qt::NoTextInteraction);
                setCursor(Qt::ClosedHandCursor);
            } else if (item->type() == 3 || item->type() == 13 || item->type() == 7) {
                QRectF r;
                if (m_selectedItem->type() == 3)
                    r = ((QGraphicsRectItem*)m_selectedItem)->rect();
                else
                    r = m_selectedItem->boundingRect();
                /*
                 * The vertices of the rectangle (check for matrix
                 * transformation); to be replaced by QTransform::map()?
                 */
                QPointF itemOrigin = item->scenePos();
                QTransform transform = item->transform();
                QPointF topLeft(transform.m11() * r.toRect().left() + transform.m21() * r.toRect().top() + transform.m31() + itemOrigin.x(), transform.m22() * r.toRect().top() + transform.m12() * r.toRect().left() + transform.m32() + itemOrigin.y());
                QPointF bottomLeft(transform.m11() * r.toRect().left() + transform.m21() * r.toRect().bottom() + transform.m31() + itemOrigin.x(), transform.m22() * r.toRect().bottom() + transform.m12() * r.toRect().left() + transform.m32() + itemOrigin.y());
                QPointF topRight(transform.m11() * r.toRect().right() + transform.m21() * r.toRect().top() + transform.m31() + itemOrigin.x(), transform.m22() * r.toRect().top() + transform.m12() * r.toRect().right() + transform.m32() + itemOrigin.y());
                QPointF bottomRight(transform.m11() * r.toRect().right() + transform.m21() * r.toRect().bottom() + transform.m31() + itemOrigin.x(), transform.m22() * r.toRect().bottom() + transform.m12() * r.toRect().right() + transform.m32() + itemOrigin.y());
                // The borders (using the transformed coordinates)
                QGraphicsLineItem borderTop(topLeft.x(), topLeft.y(), topRight.x(), topRight.y());
                QGraphicsLineItem borderRight(topRight.x(), topRight.y(), bottomRight.x(), bottomRight.y());
                QGraphicsLineItem borderBottom(bottomRight.x(), bottomRight.y(), bottomLeft.x(), bottomLeft.y());
                QGraphicsLineItem borderLeft(bottomLeft.x(), bottomLeft.y(), topLeft.x(), topLeft.y());
                // The area interested by the mouse pointer
                QPainterPath mouseArea;
                mouseArea.addRect(e->scenePos().toPoint().x() - 4 / m_zoom, e->scenePos().toPoint().y() - 4 / m_zoom, 8 / m_zoom, 8 / m_zoom);
                // Check for collisions between the mouse and the borders
                if (borderLeft.collidesWithPath(mouseArea) && borderTop.collidesWithPath(mouseArea))
                    m_resizeMode = TopLeft;
                else if (borderLeft.collidesWithPath(mouseArea) && borderBottom.collidesWithPath(mouseArea))
                    m_resizeMode = BottomLeft;
                else if (borderRight.collidesWithPath(mouseArea) && borderTop.collidesWithPath(mouseArea))
                    m_resizeMode = TopRight;
                else if (borderRight.collidesWithPath(mouseArea) && borderBottom.collidesWithPath(mouseArea))
                    m_resizeMode = BottomRight;
                else if (borderLeft.collidesWithPath(mouseArea))
                    m_resizeMode = Left;
                else if (borderRight.collidesWithPath(mouseArea))
                    m_resizeMode = Right;
                else if (borderTop.collidesWithPath(mouseArea))
                    m_resizeMode = Up;
                else if (borderBottom.collidesWithPath(mouseArea))
                    m_resizeMode = Down;
                else
                    setCursor(Qt::ClosedHandCursor);
            }
        }
        QGraphicsScene::mousePressEvent(e);
    } else if (m_tool == TITLE_RECTANGLE) {
        m_sceneClickPoint = e->scenePos();
        m_selectedItem = NULL;
    } else if (m_tool == TITLE_TEXT) {
        m_selectedItem = addText(QString());
        emit newText((QGraphicsTextItem *) m_selectedItem);
        m_selectedItem->setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable);
        ((QGraphicsTextItem *)m_selectedItem)->setTextInteractionFlags(Qt::TextEditorInteraction);
        m_selectedItem->setPos(e->scenePos() - QPointF(0, (int)(m_fontSize/2)));
        QGraphicsScene::mousePressEvent(e);
    }

    kDebug() << "//////  MOUSE CLICK, RESIZE MODE: " << m_resizeMode;

}

void GraphicsSceneRectMove::clearTextSelection()
{
    if (m_selectedItem && m_selectedItem->type() == 8) {
        // disable text editing
        QGraphicsTextItem *t = static_cast<QGraphicsTextItem *>(m_selectedItem);
        t->textCursor().setPosition(0);
        QTextBlock cur = t->textCursor().block();
        t->setTextCursor(QTextCursor(cur));
        t->setTextInteractionFlags(Qt::NoTextInteraction);
    }
    m_selectedItem = NULL;
    clearSelection();
}

void GraphicsSceneRectMove::mouseMoveEvent(QGraphicsSceneMouseEvent* e)
{
    if ((e->screenPos() - m_clickPoint).manhattanLength() < QApplication::startDragDistance()) {
        e->accept();
        return;
    }
    if (m_selectedItem && e->buttons() & Qt::LeftButton) {
        if (m_selectedItem->type() == 3 || m_selectedItem->type() == 13 || m_selectedItem->type() == 7) {
            QRectF newrect;
            if (m_selectedItem->type() == 3)
                newrect = ((QGraphicsRectItem*)m_selectedItem)->rect();
            else
                newrect = m_selectedItem->boundingRect();
            QPointF newpoint = e->scenePos();
            /*
             * The vertices of the rectangle (check for matrix
             * transformation); to be replaced by QTransform::map()?
             */
            QPointF itemOrigin = m_selectedItem->scenePos();
            QTransform transform = m_selectedItem->transform();
            QPointF topLeft(transform.m11() * newrect.toRect().left() + transform.m21() * newrect.toRect().top() + transform.m31() + itemOrigin.x(), transform.m22() * newrect.toRect().top() + transform.m12() * newrect.toRect().left() + transform.m32() + itemOrigin.y());
            QPointF bottomLeft(transform.m11() * newrect.toRect().left() + transform.m21() * newrect.toRect().bottom() + transform.m31() + itemOrigin.x(), transform.m22() * newrect.toRect().bottom() + transform.m12() * newrect.toRect().left() + transform.m32() + itemOrigin.y());
            QPointF topRight(transform.m11() * newrect.toRect().right() + transform.m21() * newrect.toRect().top() + transform.m31() + itemOrigin.x(), transform.m22() * newrect.toRect().top() + transform.m12() * newrect.toRect().right() + transform.m32() + itemOrigin.y());
            QPointF bottomRight(transform.m11() * newrect.toRect().right() + transform.m21() * newrect.toRect().bottom() + transform.m31() + itemOrigin.x(), transform.m22() * newrect.toRect().bottom() + transform.m12() * newrect.toRect().right() + transform.m32() + itemOrigin.y());
            // Convert the mouse coordinates applying inverted transformation
            QPointF newPointRelative = newpoint - itemOrigin;
            QPointF resizePoint(transform.inverted().m11() * newPointRelative.x() + transform.inverted().m21() * newPointRelative.y() + transform.inverted().m31(), transform.inverted().m22() * newPointRelative.y() + transform.inverted().m12() * newPointRelative.x() + transform.inverted().m32());
            /*
             * Will check if the mouse is on the right of the limit lines with a
             * determinant (it must be less than zero because the Y axis is
             * inverted)
             */
            int determinantH, determinantV;
            switch (m_resizeMode) {
            case TopLeft:
                determinantV = (bottomRight.x() - newpoint.x()) * (topRight.y() - newpoint.y()) - (bottomRight.y() - newpoint.y()) * (topRight.x() - newpoint.x());
                determinantH = (bottomLeft.x() - newpoint.x()) * (bottomRight.y() - newpoint.y()) - (bottomLeft.y() - newpoint.y()) * (bottomRight.x() - newpoint.x());
                if (determinantV < 0) {
                    if (determinantH < 0) {
                        // resizePoint is not working for some reason
                        newrect.setBottomRight(QPointF(newrect.width() - (transform.inverted().m11() * resizePoint.x() + transform.inverted().m21() * resizePoint.y() + transform.inverted().m31()), newrect.bottom() - (transform.inverted().m22() * resizePoint.y() + transform.inverted().m12() * resizePoint.x() + transform.inverted().m32())));
                        m_selectedItem->setPos(resizePoint + itemOrigin);
                    } else
                        m_resizeMode = BottomLeft;
                } else {
                    if (determinantH < 0)
                        m_resizeMode = TopRight;
                    else
                        m_resizeMode = BottomRight;
                }
                break;
            case BottomLeft:
                determinantV = (bottomRight.x() - newpoint.x()) * (topRight.y() - newpoint.y()) - (bottomRight.y() - newpoint.y()) * (topRight.x() - newpoint.x());
                determinantH = (topRight.x() - newpoint.x()) * (topLeft.y() - newpoint.y()) - (topRight.y() - newpoint.y()) * (topLeft.x() - newpoint.x());
                if (determinantV < 0) {
                    if (determinantH < 0) {
                        newrect.setBottomRight(QPointF(newrect.width() - resizePoint.x(), resizePoint.y()));
                        m_selectedItem->setPos(QPointF(transform.m11() * resizePoint.x() + transform.m21() *(newrect.bottom() - resizePoint.y()) + transform.m31() + itemOrigin.x(), transform.m22() *(newrect.bottom() - resizePoint.y()) + transform.m12() * resizePoint.x() + transform.m32() + itemOrigin.y()));
                    } else
                        m_resizeMode = TopLeft;
                } else {
                    if (determinantH < 0)
                        m_resizeMode = BottomRight;
                    else
                        m_resizeMode = TopRight;
                }
                break;
            case TopRight:
                determinantV = (topLeft.x() - newpoint.x()) * (bottomLeft.y() - newpoint.y()) - (topLeft.y() - newpoint.y()) * (bottomLeft.x() - newpoint.x());
                determinantH = (bottomLeft.x() - newpoint.x()) * (bottomRight.y() - newpoint.y()) - (bottomLeft.y() - newpoint.y()) * (bottomRight.x() - newpoint.x());
                if (determinantV < 0) {
                    if (determinantH < 0) {
                        newrect.setBottomRight(QPointF(resizePoint.x(), newrect.bottom() - resizePoint.y()));
                        m_selectedItem->setPos(QPointF(transform.m11() *(newrect.width() - resizePoint.x()) + transform.m21() * resizePoint.y() + transform.m31() + itemOrigin.x(), transform.m22() * resizePoint.y() + transform.m12() *(newrect.width() - resizePoint.x()) + transform.m32() + itemOrigin.y()));
                    } else
                        m_resizeMode = BottomRight;
                } else {
                    if (determinantH < 0)
                        m_resizeMode = TopLeft;
                    else
                        m_resizeMode = BottomLeft;
                }
                break;
            case BottomRight:
                determinantV = (topLeft.x() - newpoint.x()) * (bottomLeft.y() - newpoint.y()) - (topLeft.y() - newpoint.y()) * (bottomLeft.x() - newpoint.x());
                determinantH = (topRight.x() - newpoint.x()) * (topLeft.y() - newpoint.y()) - (topRight.y() - newpoint.y()) * (topLeft.x() - newpoint.x());
                if (determinantV < 0) {
                    if (determinantH < 0)
                        newrect.setBottomRight(resizePoint);
                    else
                        m_resizeMode = TopRight;
                } else {
                    if (determinantH < 0)
                        m_resizeMode = BottomLeft;
                    else
                        m_resizeMode = TopLeft;
                }
                break;
            case Left:
                determinantV = (bottomRight.x() - newpoint.x()) * (topRight.y() - newpoint.y()) - (bottomRight.y() - newpoint.y()) * (topRight.x() - newpoint.x());
                if (determinantV < 0) {
                    newrect.setRight(newrect.width() - resizePoint.x());
                    m_selectedItem->setPos(QPointF(transform.m11() * resizePoint.x() + transform.m31() + itemOrigin.x(), transform.m12() * resizePoint.x() + transform.m32() + itemOrigin.y()));
                } else
                    m_resizeMode = Right;
                break;
            case Right:
                determinantV = (topLeft.x() - newpoint.x()) * (bottomLeft.y() - newpoint.y()) - (topLeft.y() - newpoint.y()) * (bottomLeft.x() - newpoint.x());
                if (determinantV < 0)
                    newrect.setRight(resizePoint.x());
                else
                    m_resizeMode = Left;
                break;
            case Up:
                determinantH = (bottomLeft.x() - newpoint.x()) * (bottomRight.y() - newpoint.y()) - (bottomLeft.y() - newpoint.y()) * (bottomRight.x() - newpoint.x());
                if (determinantH < 0) {
                    newrect.setBottom(newrect.bottom() - resizePoint.y());
                    m_selectedItem->setPos(QPointF(transform.m21() * resizePoint.y() + transform.m31() + itemOrigin.x(), transform.m22() * resizePoint.y() + transform.m32() + itemOrigin.y()));
                } else
                    m_resizeMode = Down;
                break;
            case Down:
                determinantH = (topRight.x() - newpoint.x()) * (topLeft.y() - newpoint.y()) - (topRight.y() - newpoint.y()) * (topLeft.x() - newpoint.x());
                if (determinantH < 0)
                    newrect.setBottom(resizePoint.y());
                else
                    m_resizeMode = Up;
                break;
            default:
                QPointF diff = e->scenePos() - m_sceneClickPoint;
                m_sceneClickPoint = e->scenePos();
                m_selectedItem->moveBy(diff.x(), diff.y());
                break;
            }
            if (m_selectedItem->type() == 3 && m_resizeMode != NoResize) {
                QGraphicsRectItem *gi = (QGraphicsRectItem*)m_selectedItem;
                // Resize using aspect ratio
                if (!m_selectedItem->data(0).isNull()) {
                    // we want to keep aspect ratio
                    double hRatio = (double) newrect.width() / m_selectedItem->data(0).toInt();
                    double vRatio = (double) newrect.height() / m_selectedItem->data(1).toInt();
                    if (hRatio < vRatio) newrect.setHeight(m_selectedItem->data(1).toInt() * hRatio);
                    else newrect.setWidth(m_selectedItem->data(0).toInt() * vRatio);
                }

                gi->setRect(newrect);
            }
            /*else {
            qreal s;
            if (resizeMode == Left || resizeMode == Right ) s = m_selectedItem->boundingRect().width() / newrect.width();
            else s = m_selectedItem->boundingRect().height() / newrect.height();
            m_selectedItem->scale( 1 / s, 1 / s );
            kDebug()<<"/// SCALING SVG, RESIZE MODE: "<<resizeMode<<", RECT:"<<m_selectedItem->boundingRect();
            }*/
            //gi->setPos(m_selectedItem->scenePos());
            /*if (resizeMode == NoResize) {
                QGraphicsScene::mouseMoveEvent(e);
                return;
            }*/
        } else if (m_selectedItem->type() == 8) {
            QGraphicsTextItem *t = static_cast<QGraphicsTextItem *>(m_selectedItem);
            if (t->textInteractionFlags() & Qt::TextEditorInteraction) {
                QGraphicsScene::mouseMoveEvent(e);
                return;
            }
            QPointF diff = e->scenePos() - m_sceneClickPoint;
            m_sceneClickPoint = e->scenePos();
            m_selectedItem->moveBy(diff.x(), diff.y());
        }
        emit itemMoved();
    } else if (m_tool == TITLE_SELECT) {
        QPointF p = e->scenePos();
        p += QPoint(-2, -2);
        m_resizeMode = NoResize;
        bool itemFound = false;
        foreach(const QGraphicsItem* g, items(QRectF(p , QSizeF(4, 4)).toRect())) {
            if ((g->type() == 13 || g->type() == 7) && g->zValue() > -1000) {
                // image or svg item
                setCursor(Qt::OpenHandCursor);
                break;
            } else if (g->type() == 3 && g->zValue() > -1000) {
                QRectF r = ((const QGraphicsRectItem*)g)->rect();
                itemFound = true;
                /*
                 * The vertices of the rectangle (check for matrix
                 * transformation); to be replaced by QTransform::map()?
                 */
                QPointF itemOrigin = g->scenePos();
                QTransform transform = g->transform();
                QPointF topLeft(transform.m11() * r.toRect().left() + transform.m21() * r.toRect().top() + transform.m31() + itemOrigin.x(), transform.m22() * r.toRect().top() + transform.m12() * r.toRect().left() + transform.m32() + itemOrigin.y());
                QPointF bottomLeft(transform.m11() * r.toRect().left() + transform.m21() * r.toRect().bottom() + transform.m31() + itemOrigin.x(), transform.m22() * r.toRect().bottom() + transform.m12() * r.toRect().left() + transform.m32() + itemOrigin.y());
                QPointF topRight(transform.m11() * r.toRect().right() + transform.m21() * r.toRect().top() + transform.m31() + itemOrigin.x(), transform.m22() * r.toRect().top() + transform.m12() * r.toRect().right() + transform.m32() + itemOrigin.y());
                QPointF bottomRight(transform.m11() * r.toRect().right() + transform.m21() * r.toRect().bottom() + transform.m31() + itemOrigin.x(), transform.m22() * r.toRect().bottom() + transform.m12() * r.toRect().right() + transform.m32() + itemOrigin.y());
                // The borders (using the transformed coordinates)
                QGraphicsLineItem borderTop(topLeft.x(), topLeft.y(), topRight.x(), topRight.y());
                QGraphicsLineItem borderRight(topRight.x(), topRight.y(), bottomRight.x(), bottomRight.y());
                QGraphicsLineItem borderBottom(bottomRight.x(), bottomRight.y(), bottomLeft.x(), bottomLeft.y());
                QGraphicsLineItem borderLeft(bottomLeft.x(), bottomLeft.y(), topLeft.x(), topLeft.y());
                // The area interested by the mouse pointer
                QPainterPath mouseArea;
                mouseArea.addRect(e->scenePos().toPoint().x() - 4 / m_zoom, e->scenePos().toPoint().y() - 4 / m_zoom, 8 / m_zoom, 8 / m_zoom);
                // Check for collisions between the mouse and the borders
                if ((borderLeft.collidesWithPath(mouseArea) && borderTop.collidesWithPath(mouseArea)) || (borderRight.collidesWithPath(mouseArea) && borderBottom.collidesWithPath(mouseArea)))
                    setResizeCursor(borderLeft.line().angle() - 45);
                else if ((borderLeft.collidesWithPath(mouseArea) && borderBottom.collidesWithPath(mouseArea)) || (borderRight.collidesWithPath(mouseArea) && borderTop.collidesWithPath(mouseArea)))
                    setResizeCursor(borderLeft.line().angle() + 45);
                else if (borderLeft.collidesWithPath(mouseArea) || borderRight.collidesWithPath(mouseArea))
                    setResizeCursor(borderLeft.line().angle());
                else if (borderTop.collidesWithPath(mouseArea) || borderBottom.collidesWithPath(mouseArea))
                    setResizeCursor(borderTop.line().angle());
                else
                    setCursor(Qt::OpenHandCursor);
                break;
            }
            if (!itemFound) setCursor(Qt::ArrowCursor);
        }
        QGraphicsScene::mouseMoveEvent(e);
    } else if (m_tool == TITLE_RECTANGLE && e->buttons() & Qt::LeftButton) {
        if (m_selectedItem == NULL) {
            // create new rect item
            QRectF r(0, 0, e->scenePos().x() - m_sceneClickPoint.x(), e->scenePos().y() - m_sceneClickPoint.y());
            r = r.normalized();
            m_selectedItem = addRect(QRectF(0, 0, r.width(), r.height()));
            emit newRect((QGraphicsRectItem *) m_selectedItem);
            m_selectedItem->setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable);
            m_selectedItem->setPos(m_sceneClickPoint);
            m_resizeMode = BottomRight;
            QGraphicsScene::mouseMoveEvent(e);
        }
    }
}

void GraphicsSceneRectMove::wheelEvent(QGraphicsSceneWheelEvent * wheelEvent)
{
    if (wheelEvent->modifiers() == Qt::ControlModifier) {
        QList<QGraphicsView*> viewlist = views();
        //kDebug() << wheelEvent->delta() << " " << zoom;
        if (viewlist.size() > 0) {
            if (wheelEvent->delta() > 0) emit sceneZoom(true);
            else emit sceneZoom(false);
        }
    } else wheelEvent->setAccepted(false);
}

void GraphicsSceneRectMove::setScale(double s)
{
    if (m_zoom < 1.0 / 7.0 && s < 1.0) return;
    else if (m_zoom > 10.0 / 7.9 && s > 1.0) return;
    QList<QGraphicsView*> viewlist = views();
    if (viewlist.size() > 0) {
        viewlist[0]->scale(s, s);
        m_zoom = m_zoom * s;
    }
    //kDebug()<<"//////////  ZOOM: "<<zoom;
}

void GraphicsSceneRectMove::setZoom(double s)
{
    QList<QGraphicsView*> viewlist = views();
    if (viewlist.size() > 0) {
        viewlist[0]->resetTransform();
        viewlist[0]->scale(s, s);
        m_zoom = s;
    }

    //kDebug()<<"//////////  ZOOM: "<<zoom;
}

void GraphicsSceneRectMove::setCursor(QCursor c)
{
    const QList<QGraphicsView*> l = views();
    foreach(QGraphicsView* v, l) {
        v->setCursor(c);
    }
}

void GraphicsSceneRectMove::setResizeCursor(qreal angle)
{
    // % is not working...
    while (angle < 0)
        angle += 180;
    while (angle >= 180)
        angle -= 180;
    if (angle > 157.5 || angle <= 22.5)
        setCursor(Qt::SizeVerCursor);
    else if (angle > 22.5 && angle <= 67.5)
        setCursor(Qt::SizeFDiagCursor);
    else if (angle > 67.5 && angle <= 112.5)
        setCursor(Qt::SizeHorCursor);
    else if (angle > 112.5 && angle <= 157.5)
        setCursor(Qt::SizeBDiagCursor);
}

void GraphicsSceneRectMove::slotUpdateFontSize(int s)
{
      m_fontSize = s;
}

#include "graphicsscenerectmove.moc"

Generated by  Doxygen 1.6.0   Back to index