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36704cd02e
the program crash. Because we don't need anymore this calss i just have removed it. --HG-- branch : develop
330 lines
12 KiB
C++
330 lines
12 KiB
C++
/************************************************************************
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**
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** @file vmaingraphicsview.cpp
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** @author Roman Telezhynskyi <dismine(at)gmail.com>
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** @date November 15, 2013
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**
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** @brief
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** @copyright
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** This source code is part of the Valentine project, a pattern making
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** program, whose allow create and modeling patterns of clothing.
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** Copyright (C) 2013-2015 Valentina project
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** <https://bitbucket.org/dismine/valentina> All Rights Reserved.
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**
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** Valentina 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 3 of the License, or
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** (at your option) any later version.
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**
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** Valentina 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 Valentina. If not, see <http://www.gnu.org/licenses/>.
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**
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*************************************************************************/
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#include "vmaingraphicsview.h"
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#include <QTimeLine>
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#include <QWheelEvent>
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#include <QApplication>
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#include <QScrollBar>
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#include "vsimplepoint.h"
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#include <QGraphicsItem>
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#include <QMouseEvent>
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#include <qmath.h>
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//---------------------------------------------------------------------------------------------------------------------
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GraphicsViewZoom::GraphicsViewZoom(QGraphicsView* view)
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: QObject(view), _view(view), _modifiers(Qt::ControlModifier), _zoom_factor_base(1.0015),
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target_scene_pos(QPointF()), target_viewport_pos(QPointF()), anim(nullptr), _numScheduledScalings(0)
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{
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_view->viewport()->installEventFilter(this);
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_view->setMouseTracking(true);
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anim = new QTimeLine(300, this);
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anim->setUpdateInterval(20);
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connect(anim, &QTimeLine::valueChanged, this, &GraphicsViewZoom::scrollingTime, Qt::UniqueConnection);
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connect(anim, &QTimeLine::finished, this, &GraphicsViewZoom::animFinished, Qt::UniqueConnection);
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}
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//---------------------------------------------------------------------------------------------------------------------
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void GraphicsViewZoom::gentle_zoom(double factor)
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{
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_view->scale(factor, factor);
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_view->centerOn(target_scene_pos);
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QPointF delta_viewport_pos = target_viewport_pos - QPointF(_view->viewport()->width() / 2.0,
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_view->viewport()->height() / 2.0);
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QPointF viewport_center = _view->mapFromScene(target_scene_pos) - delta_viewport_pos;
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_view->centerOn(_view->mapToScene(viewport_center.toPoint()));
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emit zoomed();
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}
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//---------------------------------------------------------------------------------------------------------------------
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// cppcheck-suppress unusedFunction
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void GraphicsViewZoom::set_modifiers(Qt::KeyboardModifiers modifiers)
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{
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_modifiers = modifiers;
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}
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//---------------------------------------------------------------------------------------------------------------------
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// cppcheck-suppress unusedFunction
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void GraphicsViewZoom::set_zoom_factor_base(double value)
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{
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_zoom_factor_base = value;
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}
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//---------------------------------------------------------------------------------------------------------------------
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void GraphicsViewZoom::scrollingTime(qreal x)
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{
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Q_UNUSED(x);
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qreal factor = 1.0;
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if (_numScheduledScalings < 0)
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{
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factor = factor*13.8;
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}
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else
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{
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factor = factor*-13.8;
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}
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_view->verticalScrollBar()->setValue(qRound(_view->verticalScrollBar()->value() + factor));
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}
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//---------------------------------------------------------------------------------------------------------------------
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void GraphicsViewZoom::animFinished()
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{
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if (_numScheduledScalings > 0)
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{
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_numScheduledScalings--;
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}
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else
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{
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_numScheduledScalings++;
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}
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anim->stop();
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/*
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* In moust cases cursor position on view doesn't change, but for scene after scrolling position will be different.
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* We are goint to check changes and save new value.
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* If don't do that we will zoom using old value cursor position on scene. It is not what we expect.
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* Almoust the same we do in method GraphicsViewZoom::eventFilter.
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*/
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QPoint pos = _view->mapFromGlobal(QCursor::pos());
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QPointF delta = target_scene_pos - _view->mapToScene(pos);
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if (qAbs(delta.x()) > 5 || qAbs(delta.y()) > 5)
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{
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target_viewport_pos = pos;
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target_scene_pos = _view->mapToScene(pos);
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}
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}
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//---------------------------------------------------------------------------------------------------------------------
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bool GraphicsViewZoom::eventFilter(QObject *object, QEvent *event)
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{
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if (event->type() == QEvent::MouseMove)
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{
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/*
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* Here we are saving cursor position on view and scene.
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* This data need for gentle_zoom().
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* Almoust the same we do in method GraphicsViewZoom::animFinished.
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*/
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QMouseEvent* mouse_event = static_cast<QMouseEvent*>(event);
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QPointF delta = target_viewport_pos - mouse_event->pos();
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if (qAbs(delta.x()) > 5 || qAbs(delta.y()) > 5)
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{
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target_viewport_pos = mouse_event->pos();
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target_scene_pos = _view->mapToScene(mouse_event->pos());
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}
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}
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else if (event->type() == QEvent::Wheel)
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{
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QWheelEvent* wheel_event = static_cast<QWheelEvent*>(event);
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if (QApplication::keyboardModifiers() == _modifiers)
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{
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if (wheel_event->orientation() == Qt::Vertical)
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{
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double angle = wheel_event->angleDelta().y();
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double factor = qPow(_zoom_factor_base, angle);
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gentle_zoom(factor);
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return true;
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}
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}
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else
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{
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int numSteps = wheel_event->delta() / 8 / 15; // see QWheelEvent documentation
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_numScheduledScalings += numSteps;
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if (_numScheduledScalings * numSteps < 0)
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{ // if user moved the wheel in another direction, we reset
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_numScheduledScalings = numSteps; // previously scheduled scalings
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}
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if (anim->state() != QTimeLine::Running)
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{
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anim->start();
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}
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return true;
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}
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}
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Q_UNUSED(object)
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return false;
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}
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//---------------------------------------------------------------------------------------------------------------------
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/**
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* @brief VMainGraphicsView constructor.
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* @param parent parent object.
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*/
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VMainGraphicsView::VMainGraphicsView(QWidget *parent)
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:QGraphicsView(parent), zoom(nullptr), showToolOptions(true)
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{
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zoom = new GraphicsViewZoom(this);
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this->setResizeAnchor(QGraphicsView::AnchorUnderMouse);
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this->setTransformationAnchor(QGraphicsView::AnchorUnderMouse);
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this->setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);
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this->setInteractive(true);
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}
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//---------------------------------------------------------------------------------------------------------------------
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void VMainGraphicsView::ZoomIn()
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{
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scale(1.1, 1.1);
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VMainGraphicsView::NewSceneRect(this->scene(), this);
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emit NewFactor(1.1);
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}
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//---------------------------------------------------------------------------------------------------------------------
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void VMainGraphicsView::ZoomOut()
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{
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scale(1.0/1.1, 1.0/1.1);
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VMainGraphicsView::NewSceneRect(this->scene(), this);
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emit NewFactor(1.0/1.1);
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}
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//---------------------------------------------------------------------------------------------------------------------
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void VMainGraphicsView::ZoomOriginal()
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{
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QTransform trans = this->transform();
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trans.setMatrix(1.0, trans.m12(), trans.m13(), trans.m21(), 1.0, trans.m23(), trans.m31(), trans.m32(),
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trans.m33());
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this->setTransform(trans);
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VMainGraphicsView::NewSceneRect(this->scene(), this);
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emit NewFactor(1.0);
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}
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//---------------------------------------------------------------------------------------------------------------------
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void VMainGraphicsView::ZoomFitBest()
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{
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QRectF rect = this->scene()->itemsBoundingRect();
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if (rect.isEmpty())
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{
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return;
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}
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this->fitInView(rect, Qt::KeepAspectRatio);
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VMainGraphicsView::NewSceneRect(this->scene(), this);
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emit NewFactor(this->transform().m11());
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}
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//---------------------------------------------------------------------------------------------------------------------
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/**
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* @brief mousePressEvent handle mouse press events.
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* @param mousePress mouse press event.
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*/
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void VMainGraphicsView::mousePressEvent(QMouseEvent *mousePress)
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{
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if (mousePress->button() & Qt::LeftButton)
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{
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switch (QGuiApplication::keyboardModifiers())
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{
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case Qt::ControlModifier:
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QGraphicsView::setDragMode(QGraphicsView::ScrollHandDrag);
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break;
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case Qt::NoModifier:
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if (showToolOptions)
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{
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QList<QGraphicsItem *> list = items(mousePress->pos());
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if (list.size() == 0)
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{
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emit itemClicked(nullptr);
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break;
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}
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for (int i = 0; i < list.size(); ++i)
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{
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if (this->scene()->items().contains(list.at(i)))
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{
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if (list.at(i)->type() <= VSimplePoint::Type &&
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list.at(i)->type() > QGraphicsItem::UserType)
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{
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emit itemClicked(list.at(i));
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break;
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}
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else
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{
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emit itemClicked(nullptr);
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}
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}
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}
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}
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break;
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default:
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break;
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}
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}
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QGraphicsView::mousePressEvent(mousePress);
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}
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//---------------------------------------------------------------------------------------------------------------------
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/**
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* @brief mouseReleaseEvent handle mouse release events.
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* @param event mouse release event.
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*/
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void VMainGraphicsView::mouseReleaseEvent(QMouseEvent *event)
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{
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QGraphicsView::mouseReleaseEvent ( event );
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QGraphicsView::setDragMode( QGraphicsView::RubberBandDrag );
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if (event->button() == Qt::LeftButton)
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{
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emit MouseRelease();
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}
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}
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//---------------------------------------------------------------------------------------------------------------------
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void VMainGraphicsView::setShowToolOptions(bool value)
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{
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showToolOptions = value;
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}
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//---------------------------------------------------------------------------------------------------------------------
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/**
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* @brief NewSceneRect calculate scene rect what contains all items and doesn't less that size of scene view.
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* @param sc scene.
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* @param view view.
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*/
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void VMainGraphicsView::NewSceneRect(QGraphicsScene *sc, QGraphicsView *view)
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{
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SCASSERT(sc != nullptr);
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SCASSERT(view != nullptr);
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//Calculate view rect
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//to receive the currently visible area, map the widgets bounds to the scene
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const QPointF a = view->mapToScene(0, 0 );
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const QPointF b = view->mapToScene(view->viewport()->width(), view->viewport()->height());
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const QRectF viewRect = QRectF( a, b );
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//Calculate scene rect
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const QRectF itemsRect = sc->itemsBoundingRect();
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//Unite two rects
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const QRectF newRect = itemsRect.united(viewRect);
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if (newRect != itemsRect)
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{//Update if only need
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sc->setSceneRect(newRect);
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}
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}
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