Taborca: boxtool.cpp (40) Source File

00001 #include "boxtool.h"
00002 #include "pdfscene.h"
00003 #include <QGraphicsView>
00004 
00005 BoxTool::BoxTool(PDFScene* scene) :
00006     Tool(scene),
00007     box(NULL)
00008 {
00009 }
00010 
00011 void BoxTool::activate()
00012 {
00013     scene->setTool(this);
00014     foreach(QGraphicsView* view, scene->views())
00015     {
00016         view->setDragMode(QGraphicsView::NoDrag);
00017         view->viewport()->setCursor(Qt::CrossCursor);
00018     }
00019 }
00020 
00021 void BoxTool::mousePressEvent ( QGraphicsSceneMouseEvent * ev)
00022 {
00023     box = new Rectangle(ev->scenePos().x(), ev->scenePos().y(), 10, 10);
00024     scene->addItem(box);
00025     box->setZValue(1.0);
00026 }
00027 
00028 void BoxTool::mouseMoveEvent ( QGraphicsSceneMouseEvent * ev)
00029 {
00030     if (box)
00031     {
00032         QRectF rect = box->rect();
00033         rect.setBottomRight(ev->scenePos());
00034         // If we normalize rect here, there are no droppings
00035         // while dragging a rectangle to size, but,
00036         // drawing the rectangle backwards is also not allowed.
00037         // The upper-left corner is anchored and the lower-right corner
00038         // is dragged.
00041         box->setRect(rect.normalized());
00042     }
00043 }
00044 
00045 void BoxTool::mouseReleaseEvent ( QGraphicsSceneMouseEvent * /* ev */)
00046 {
00047     if (box)
00048         box->setRect(box->rect().normalized());
00049     box = NULL;
00050 }