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/*------------------------------------------------------------------------------
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-- This file is a part of the Kicad Tools Software
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-- Copyright (C) 2015, Plasma Physics Laboratory - CNRS
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--
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-- This program is free software; you can redistribute it and/or modify
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-- it under the terms of the GNU General Public License as published by
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-- the Free Software Foundation; either version 2 of the License, or
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-- (at your option) any later version.
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--
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-- This program is distributed in the hope that it will be useful,
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-- but WITHOUT ANY WARRANTY; without even the implied warranty of
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-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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-- GNU General Public License for more details.
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--
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-- You should have received a copy of the GNU General Public License
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-- along with this program; if not, write to the Free Software
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-- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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-------------------------------------------------------------------------------*/
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/*-- Author : Alexis Jeandet
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-- Mail : alexis.jeandet@member.fsf.org
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----------------------------------------------------------------------------*/
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#include "graphicview.h"
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#include <math.h>
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#include <QPixmapCache>
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GraphicView::GraphicView(QWidget *parent)
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:QGraphicsView(parent)
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{
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this->setRenderHint(QPainter::Antialiasing, true);
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this->setDragMode(QGraphicsView::RubberBandDrag);
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this->setOptimizationFlags(QGraphicsView::DontSavePainterState);
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this->setViewportUpdateMode(QGraphicsView::SmartViewportUpdate);
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this->setContextMenuPolicy(Qt::ActionsContextMenu);
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this->setTransformationAnchor(AnchorUnderMouse);
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this->scale(qreal(0.8), qreal(0.8));
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this->setRubberBandSelectionMode(Qt::ContainsItemBoundingRect);
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this->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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this->setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
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// this->setViewport(new QOpenGLWidget());
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QPixmapCache::setCacheLimit(1024*1024*4);
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this->ctrl_pressed = false;
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this->shift_pressed = false;
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}
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void GraphicView::keyPressEvent(QKeyEvent *event)
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{
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switch (event->key()) {
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case Qt::Key_Plus:
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zoomIn();
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break;
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case Qt::Key_Minus:
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zoomOut();
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break;
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case Qt::Key_Shift:
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this->shift_pressed = true;
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break;
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case Qt::Key_Control:
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this->ctrl_pressed = true;
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break;
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default:
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QGraphicsView::keyPressEvent(event);
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}
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}
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void GraphicView::keyReleaseEvent(QKeyEvent *event)
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{
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switch (event->key()) {
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case Qt::Key_Shift:
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this->shift_pressed = false;
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break;
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case Qt::Key_Control:
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this->ctrl_pressed = false;
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break;
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default:
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QGraphicsView::keyReleaseEvent(event);
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}
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}
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void GraphicView::wheelEvent(QWheelEvent *event)
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{
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if (event->modifiers() & Qt::ControlModifier)
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{
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event->accept();
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if (event->orientation()== Qt::Vertical)
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scaleView(pow((double)2, event->delta() / 240.0));
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}
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else
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{
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if (event->modifiers() & Qt::ShiftModifier)
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{
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event->accept();
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QWheelEvent* tempevent = new QWheelEvent(event->pos(),(event->delta()/10),event->buttons(),event->modifiers(),Qt::Horizontal);
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QGraphicsView::wheelEvent(tempevent);
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}
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else
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QGraphicsView::wheelEvent(event);
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}
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}
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void GraphicView::drawBackground(QPainter *painter, const QRectF &rect)
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{
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Q_UNUSED(rect);
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// Shadow
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QRectF sceneRect = this->sceneRect();
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QRectF rightShadow(sceneRect.right(), sceneRect.top() + 2, 2, sceneRect.height());
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QRectF bottomShadow(sceneRect.left() + 2, sceneRect.bottom(), sceneRect.width(), 2);
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if (rightShadow.intersects(rect) || rightShadow.contains(rect))
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painter->fillRect(rightShadow, Qt::darkGray);
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if (bottomShadow.intersects(rect) || bottomShadow.contains(rect))
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painter->fillRect(bottomShadow, Qt::darkGray);
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// Fill
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QLinearGradient gradient(sceneRect.topLeft(), sceneRect.bottomRight());
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gradient.setColorAt(0, Qt::white);
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gradient.setColorAt(1, Qt::lightGray);
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painter->fillRect(rect.intersected(sceneRect), gradient);
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painter->setBrush(Qt::NoBrush);
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painter->drawRect(sceneRect);
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}
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void GraphicView::scaleView(qreal scaleFactor)
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{
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qreal factor = transform().scale(scaleFactor, scaleFactor).mapRect(QRectF(0, 0, 1, 1)).width();
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if (factor < 0.02 || factor > 1000)
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return;
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scale(scaleFactor, scaleFactor);
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}
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void GraphicView::zoomIn()
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{
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scaleView(qreal(1.2));
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}
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void GraphicView::zoomOut()
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{
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scaleView(1 / qreal(1.2));
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}
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